ab1-a-b-cc2xyz1-x-y-z-vv22, wherein 0.1≤x<0.3, 0.02≤y≤0.2, 0.2≤z≤0.4 and 0≤v≤0.01, and the shell containing pores. In said precursor of the present application, primary particles of the core are of a dense packing while primary particles of the shell are of a loose packing, so that compaction density, energy density, porosity and specific surface area of the material are improved, thus improving properties of the material.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
2.
COBALT-FREE NICKEL-MANGANESE BINARY PRECURSOR MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present application are a cobalt-free nickel-manganese binary precursor material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing a nickel-manganese metal source solution, a precipitant solution and a first complexing agent solution, and carrying out a nucleation stage of a coprecipitation reaction; after the nucleation stage is finished, adjusting the pH value of the coprecipitation reaction, replacing the first complexing agent solution with a second complexing agent solution containing an additive, and carrying out a growth stage of the coprecipitation reaction, so as to obtain a precursor slurry; and washing and drying the precursor slurry, so as to obtain the cobalt-free nickel manganese binary precursor material, wherein a washing solution used in washing comprises a reducing agent. In the preparation method of the present application, the additive is added in the growth stage of the coprecipitation reaction to control the growth of crystals, and the reducing agent is added in the washing stage of the post-treatment to inhibit the precipitation of a manganese oxide, thereby enabling the obtained precursor to have a better crystallinity and a lower precipitation amount of the manganese oxide.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
3.
HIGH-ENTROPY LITHIUM-RICH MANGANESE-BASED PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Disclosed in the present application are a high-entropy lithium-rich manganese-based precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: 1) preparing an aluminum-niobium co-doped nickel-manganese precursor by using a co-precipitation method; 2) introducing a doping and coating solution into the reaction system for preparing the aluminum-niobium co-doped nickel-manganese precursor, wherein the doping and coating solution comprises zirconium, tungsten and titanium, proceeding with the co-precipitation reaction to coat the aluminum-niobium co-doped nickel-manganese precursor, thereby obtaining a doped and coated precursor; and 3) sintering the doped and coated precursor to make doping elements in the doped and coated precursor diffuse, thereby obtaining the high-entropy lithium-rich manganese-based precursor. In the present application, by combining wet doping and coating in a synthesis stage of the high-entropy lithium-rich manganese-based precursor, elements are uniformly distributed without affecting the morphology and structure of the precursor, thereby effectively improving the structural stability of the high-entropy lithium-rich manganese-based positive electrode material prepared from the precursor, and improving the electrochemical performance thereof.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
4.
POROUS ALUMINUM GRADIENT LITHIUM-RICH MANGANESE-BASED PRECURSOR, PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a porous aluminum gradient lithium-rich manganese-based precursor, a preparation method therefor, and a use thereof. In the preparation method, a porous aluminum gradient lithium-rich manganese-based precursor particle prepared by means of a two-step co-precipitation reaction comprises a dense nickel-cobalt-manganese core and a loose porous aluminum concentration gradient shell layer coated on the surface of the core, so that the particle has a dense interior, providing relatively high tap density and energy density; the porous aluminum-containing shell layer formed on the surface enhances the transmission and diffusion of lithium ions, thereby improving the rate performance of a positive electrode material; in addition, the porous structure on the surface can also alleviate stress changes during charging and discharging, reduce the generation of microcracks induced by lithium ion deintercalation, and improve the structural stability of the positive electrode material.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
5.
HIGH-ENTROPY METAL OXIDE POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND SODIUM-ION BATTERY
xabcdefg22, wherein 0.8≤x≤1.05, 0.1≤a≤0.2, 0.1≤b≤0.2, 0.1≤c≤0.2, 0≤d≤0.25, 0≤e≤0.25, 0≤f≤0.25, and 0≤g≤0.25; d, e, f, and g cannot be 0 at the same time; a+b+c+d+e+f+g=1; and M1, M2, M3, and M4 are each independently selected from Li, Mg, Cu, Zn, Ca, V, Al, or Zr. A plurality of specific types of low-cost metal elements are introduced into the layered oxide positive electrode material by using a high-entropy strategy; therefore, the structure of the O3-type material can be stabilized, and the stability of the material during a cycling process is improved.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
6.
COBALT-FREE, MAGNESIUM-DOPED LITHIUM-RICH MANGANESE-BASED POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
x1-xy22, where 0.1 ≤ x ≤ 0.5 and 0.01 ≤ y ≤ 0.1. The preparation method comprises: (1) mixing a nickel salt, a manganese salt, a magnesium salt, and deionized water to obtain a metal salt solution; (2) adding the metal salt solution, a precipitant solution, and a complexing agent solution into a base liquid in parallel flow and carrying out co-precipitation reaction, so as to obtain a lithium-rich manganese-based precursor; (3) mixing the lithium-rich manganese-based precursor and a lithium salt and performing primary calcination, so as to obtain a lithium-rich manganese-based intermediate; and (4) mixing the lithium-rich manganese-based intermediate and a lithium salt solution, and performing solid-liquid separation and then secondary calcination, so as to obtain a cobalt-free, magnesium-doped lithium-rich manganese-based positive electrode material. The provided cobalt-free, magnesium-doped lithium-rich manganese-based positive electrode material overcomes the shortcomings of conventional modification methods and improves the electrochemical performance of positive electrode materials.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
7.
COMBINED TREATMENT METHOD FOR LATERITE NICKEL ORE HYDROMETALLURGICAL SLAG AND PHOSPHATING SLAG
Disclosed is a combined treatment method for laterite nickel ore hydrometallurgical slag and phosphating slag, the combined treatment method includes uniformly mixing a laterite nickel ore hydrometallurgical slag, a phosphating slag, and a sodium alkaline salt to obtain a mixed material; subjecting the mixed material to sodium reduction roasting to obtain a roasted material; leaching the roasted material with water and filtering to obtain a water leaching solution and a water leaching slag; subjecting the water leaching slag to magnetic separation to obtain an iron concentrate. In the disclosure, by mixing a laterite nickel ore hydrometallurgical slag and a phosphating slag and then performing sodium reduction roasting, the iron exists in the form of Fe3O4 and elements such as manganese and zinc exist in the slag in the form of oxides, and during the roasting process, aluminum oxides react with alkali to be converted into sodium aluminate.
A core-shell-type sodium-ion battery positive electrode material, and a preparation method therefor and the use thereof. The positive electrode material comprises a nickel-iron-manganese inner core and a zinc-magnesium co-doped outer shell. The preparation method comprises: (1) mixing a nickel salt, a ferric salt, a manganese salt and deionized water, so as to obtain a first metal salt solution; (2) mixing a zinc salt, a magnesium salt and deionized water, so as to obtain a second metal salt solution; (3) adding the first metal salt solution, a precipitant solution and a complexing agent solution into a base solution in a parallel flow manner to perform a co-precipitation reaction, so as to obtain a nickel-iron-manganese inner core precursor; (4) replacing the first metal salt solution with a second metal salt solution, and continuously performing a co-precipitation reaction, so as to obtain a precursor; and (5) mixing the core-shell-type sodium-ion battery precursor and a sodium source, and sintering the mixture, so as to obtain a positive electrode material, wherein microwave-assisted heating is used for both the co-precipitation reactions. The preparation method simplifies the synthesis process, improves the production efficiency, and further improves the electrochemical performance of the material.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
9.
METHOD FOR MEASURING FERROUS IRON CONTENT IN LATERITE NICKEL ORE
A method for measuring the ferrous iron content in a laterite nickel ore, comprising the following steps: (1) decomposing a laterite nickel ore sample by using a first mixed acid solution to obtain a sample solution; (2) mixing a second mixed acid solution and the sample solution, and dropwisely adding sodium diphenylamine sulfonate to the obtained mixed solution as an indicator; (3) titrating the mixed solution by using a potassium dichromate standard solution, a titration endpoint being reached when the color of the solution changes to purple blue; and (4) calculating the ferrous iron content in the laterite nickel ore sample on the basis of the consumption amount of the potassium dichromate standard solution, wherein the first mixed acid solution in step (1) comprises a sulfuric acid solution and a hydrofluoric acid solution, and the second mixed acid solution in step (2) comprises a sulfuric acid solution, a phosphoric acid solution and a boric acid solution.
G01N 31/16 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using titration
10.
METHOD FOR PREPARING LITHIUM MANGANESE IRON PHOSPHATE MATERIAL, LITHIUM MANGANESE IRON PHOSPHATE MATERIAL, AND USE
The present application provides a method for preparing a lithium manganese iron phosphate material, a lithium manganese iron phosphate material, and use. The method comprises the following steps: mixing a manganese source, an iron source, and a solvent to give a mixed liquid, removing the solvent from the mixed liquid, and calcining the residue to give an oxide precursor; and mixing a phosphorus source and a lithium source with the oxide precursor and sintering the mixture to give the lithium manganese iron phosphate material. In the method of the present application, an oxide precursor containing manganese and iron is prepared first, so that manganese and iron are mixed at an atomic level, and the lithium manganese iron phosphate material is then prepared. As a result, the process of preparing lithium manganese iron phosphate is simplified, and the elements manganese and iron in the prepared lithium manganese iron phosphate material are mixed at an atomic level, thereby improving the cycling performance of the lithium manganese iron phosphate material.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
11.
CORE-SHELL MANGANESE-BASED BATTERY PRECURSOR, POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR
A core-shell manganese-based battery precursor, a positive electrode material, and a preparation method therefor. The core-shell manganese-based battery precursor comprises a core and a shell layer covering the surface of the core, wherein the core comprises nickel manganese hydroxide; the shell layer comprises nickel manganese hydroxide doped with a metal; the shell layer comprises, sequentially from the core outwards, a first outer shell and a second outer shell; and the doped metal comprises at least Zr, and the content of Zr in the second outer shell is greater than the content of Zr in the first outer shell. The precursor can provide a higher specific capacity for the positive electrode material and inhibit phase transition. The shell material can effectively prevent the core of the material from coming into contact with an electrolyte, avoid the precipitation of lattice oxygen and the dissolution of Mn, and can comprehensively improve the cycle performance and rate performance of a lithium-rich manganese-based battery under high voltage conditions.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
12.
CORE-SHELL TERNARY PRECURSOR AND PREPARATION METHOD THEREFOR, AND POSITIVE ELECTRODE MATERIAL
xyz2-a4aa, wherein x is greater than 0, but less than 1; y is greater than 0, but less than 1; z is greater than 0, but less than 1; x+y+z=1; and the value range of a is 0.01-1. The shell contains aluminum. By means of a combination of tungsten doping and aluminum doping, the advantages of the both are incorporated, and a high-performance precursor is prepared. In addition, the core-shell precursor can effectively improve the surface structure of a precursor, suppress the propagation of cracks on the surface of a high-nickel large-particle precursor, and also effectively inhibit the corrosion of a positive electrode material by an electrolyte, thereby prolonging the battery life.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
13.
COATED LITHIUM MANGANESE IRON PHOSPHATE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
A coated lithium manganese iron phosphate material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing and drying a phosphorus source, a lithium source, a manganese source, an iron source, a solvent, an organic amine and an organic carbon source, so as to obtain a precursor, wherein the organic amine comprises an amino group, and the organic carbon source comprises a hydroxyl group; and calcining the precursor, so as to obtain the coated lithium manganese iron phosphate material. By means of in-situ coating used in the preparation method, not only can in-situ doping of both carbon and nitrogen be achieved, but a carbon-nitrogen-coated network having high conductivity can also be formed, thereby overcoming the problems of poor intrinsic conductivity for both electrons and lithium ions, a low capacity retention rate during long-term cycling, etc., of lithium iron manganese phosphate materials.
H01M 4/1397 - Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
14.
TERNARY PLATINUM-BASED ALLOY CATALYST, AND PREPARATION METHOD THEREFOR AND USE THEREOF
A ternary platinum-based alloy catalyst, and a preparation method therefor and the use thereof. The ternary platinum-based alloy catalyst comprises a carrier and active particles loaded in the carrier, wherein the ternary platinum-based alloy catalyst is doped with non-metal atoms, which comprise N atoms and/or P atoms; and the active particles comprise a ternary platinum-based alloy material, the constituent elements of which comprise Pt, M1 and M2, M1 and M2 being different non-noble metal elements. By means of the synergistic cooperation between the non-metal atoms and the elements of platinum, M1 and M2 in the ternary platinum-based alloy catalyst, the dissolution of the metal is effectively inhibited, the anchoring effect on nanoparticles is enhanced, the migration and agglomeration effects of the nanoparticles are weakened, the adjustment of the particle size of the platinum-based catalyst is facilitated, and the activity and stability of the catalyst in a cathode of a fuel cell are greatly improved.
A precursor having high sphericity and tap density, a preparation method therefor, and a use thereof, the preparation method comprising adding carbonate into a precipitant solution. Compared with bases such as sodium hydroxide and potassium hydroxide, carbonate more easily precipitates metal ions; thus, in a hydroxide precipitation system, introducing carbonate induces crystal defects, thereby promoting the formation of amorphous branches and improving sphericity; in addition, the degree of reaction of carbonate with metal ions is also easier to control. By means of controlling the amount of carbonate added at different stages of a co-precipitation reaction, the present method obtains a precursor having high sphericity and tap density.
Provided in the present application is a resource utilization method for high-pressure acid leaching residues of laterite nickel ore. The method comprises: (1) performing alkaline washing and solid-liquid separation on high-pressure acid leaching residues of laterite nickel ore to obtain alkaline washed residues; (2) subjecting the alkaline washed residues in step (1) to first water washing and solid-liquid separation to obtain first water washed residues; (3) subjecting the first water washed residues in step (2) to acid washing and solid-liquid separation to obtain acid washed residues; and (4) subjecting the acid washed residues in step (3) to second water washing and solid-liquid separation to obtain second water washed residues, and drying same to obtain an iron concentrate product. The present application uses staged washing to selectively elute impurities from high-pressure acid leaching residues of laterite nickel ore, achieves iron enrichment and recovery, and obtains high-grade Hematite concentrate products, thereby achieving efficient resource utilization of high-pressure acid leaching residues of laterite nickel ore.
The present application provides a method for recovering hydrometallurgical residue of lateritic nickel ore. The method comprises: (1) subjecting hydrometallurgical residue of lateritic nickel ore to an alkali leaching treatment, so as to obtain a first leachate and a first leach residue; and subjecting the first leachate to evaporative crystallization, so as to obtain a sodium sulfate product; (2) subjecting the first leach residue to a water leaching treatment, and introducing carbon dioxide, so as to obtain a second leachate and a second leach residue; and subjecting the second leachate to evaporative crystallization, so as to obtain a calcium carbonate product; (3) mixing the second leach residue, a carbonaceous reducing agent and a fluxing agent, performing reduction roasting, crushing same, and then performing a size mixing treatment, so as to obtain an intermediate slurry; and (4) subjecting the intermediate slurry to magnetic separation, so as to obtain a magnetic substance and a non-magnetic substance, wherein the magnetic substance is an iron ore concentrate product, and the non-magnetic substance is used for producing a building material or a cement product. The recovery method provided in the present application achieves the recycling of iron resources, and improves the resource utilization rate of lateritic nickel ore, while simplifying the process flow, and avoiding environmental pollution.
xyab22, wherein 0.25＜x≤0.4, 0.6≤y＜0.75, 0.001≤a＜0.005, 0.005≤b＜0.01, x+y+a+b=1, the content of Nb element decreases in a gradient from inside to outside, the content of Co element increases in a gradient from inside to outside, and the lithium-rich manganese-based precursor has a compact inner structure and a loose outer structure. Further provided are a preparation method for the precursor, a further obtained positive electrode material, and a solid-state battery.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material, wherein the bulk phase of the lithium-rich manganese-based positive electrode material is doped with a high-valent transition metal element, and the surface phase of the lithium-rich manganese-based positive electrode material has a lithium metal compound coating layer and an oxygen vacancy. In the modified lithium-rich manganese-based positive electrode material, the doping with a bulk-phase high-valence transition metal element, the coating with a surface-phase lithium metal compound coating layer and the construction of an oxygen vacancy are conducted at the same time; and by means of the co-action of the three, the rate capability and the cycling performance of the lithium-rich manganese-based positive electrode material can be significantly improved, which is of great significance for the further commercialization of the lithium-rich manganese-based positive electrode material.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A high-stability lithium-rich manganese-based positive electrode material, a preparation method therefor, and use thereof. The preparation method comprises the following steps: mixing a lithium-rich manganese-based positive electrode material to be modified and an ammonium salt containing a transition metal, and sintering to give an intermediate material; and performing water leaching treatment on the intermediate material to give the high-stability lithium-rich manganese-based positive electrode material. The preparation method synchronously allows for oxygen vacancies, transition metal doping, and lithium concentration gradient distribution on the surface of the lithium-rich manganese-based positive electrode material, thereby enabling the lithium-rich manganese-based positive electrode material to possess high rate performance, voltage attenuation suppression, and excellent long-term cycling stability. Moreover, the method is simple and low-cost, and has good repeatability, making it very suitable for large-scale production and facilitating the practical application of high-capacity and high-voltage materials in high-energy-density batteries.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
21.
LITHIUM-RICH MANGANESE-BASED POSITIVE ELECTRODE MATERIAL HAVING LITHIUM CONCENTRATION GRADIENT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a lithium-rich manganese-based positive electrode material having a lithium concentration gradient, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: uniformly mixing a lithium-rich manganese-based positive electrode material with a modifier, and calcining the resulting mixture in an inert atmosphere to obtain a coated modified positive electrode material; and carrying out pure water ultrasonic treatment on the obtained coated modified positive electrode material and drying the treated material to obtain the lithium-rich manganese-based positive electrode material having a lithium concentration gradient, wherein the modifier can react with Li to generate a lithium salt readily soluble in water. The preparation method of the present application realizes lithium concentration distribution by means of water immersion and has the advantages of environmental optimization, low costs, and easy scale-up. A lithium concentration gradient layer can inhibit the transition of a layered structure to a spinel structure, and thus, the thermal stability of the structure is significantly improved and high-rate performance, inhibited voltage attenuation, and excellent long-term stability are achieved.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
22.
SODIUM-ION BATTERY POSITIVE ELECTRODE MATERIAL OF CORE-SHELL STRUCTURE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided are a sodium-ion battery positive electrode material of a core-shell structure, and a preparation method therefor and a use thereof. The sodium-ion battery positive electrode material is of a core-shell structure, and comprises a nickel-manganese-zinc inner core, an iron-based intermediate layer and a copper-based shell which are stacked. The preparation method comprises: (1) mixing a nickel salt, a manganese salt, a zinc salt and deionized water to obtain a ternary salt solution; (2) carrying out first spray pyrolysis on the ternary salt solution to obtain a first precursor; (3) mixing an iron salt solution and the first precursor for second spray pyrolysis to obtain a second precursor; (4) mixing a copper salt solution and the second precursor for third spray pyrolysis to obtain a third precursor; and (5) mixing a sodium salt and the third precursor for calcination to obtain a sodium-ion battery positive electrode material of a core-shell structure. A sodium-ion battery positive electrode material of a core-shell structure is prepared by means of a spray pyrolysis method, improving the sphericity and the particle size uniformity of particles while simplifying the preparation process, improving the electrochemical performance of the material, and facilitating large-scale popularization and application.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
23.
PRECURSOR WITH CORE-SHELL STRUCTURE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Disclosed in the present application are a precursor with a core-shell structure, and a preparation method therefor and the use thereof. The precursor with a core-shell structure comprises a porous nickel-rich core and a manganese-rich or aluminum-containing shell that coats the surface of the core, wherein primary crystal grains forming the core are of a thin needle shape, and primary crystal grains forming the shell are of a thick block shape. By means of the method of the present application, during a coprecipitation reaction process, an internal loose and porous structure is manufactured by means of micro-oxidation, and a core-shell structure is formed; and a positive electrode material prepared from the precursor has improved rate capability, cycling performance and safety performance. By means of the method of the present application, a precursor having an internal porous structure can be formed without needing to add an extra pore-forming agent or a specific organic additive, thereby effectively avoiding the problem of reduced product performance due to impurity residues or increased cost due to subsequent impurity removal; and the preparation method is simple, and is easily applied to mass production.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
24.
CORE-SHELL CATHODE PRECURSOR, PREPARATION METHOD THEREFOR, AND USE THEREOF
The present application provides a core-shell cathode precursor, a preparation method therefor, and use thereof. The preparation method comprises: firstly, preparing a nickel-cobalt-manganese primary particle cluster core by means of reverse feeding, then taking the nickel-cobalt-manganese primary particle cluster core as a seed crystal, and carrying out in-situ growth on the exterior of the seed crystal by means of forward feeding to obtain a nickel-cobalt-manganese single crystal coating layer as an outer shell, such that the core-shell cathode precursor for a lithium-ion battery can be simply and efficiently prepared. In one aspect, since the core is porous and fluffy, the prepared core-shell cathode precursor can be used as a buffer layer for material deformation, so that internal stress is reduced, and the lithium ion storage space can be provided; in another aspect, the nickel-cobalt-manganese single crystal coating layer is based on uniform contraction and expansion of a single crystal material, so that cracking of the material is reduced, and side reaction with an electrolyte is inhibited, thereby reducing polarization overpotential of lithium ion diffusion, and the in-situ grown nickel-cobalt-manganese single crystal serves as a firm and stable primary particle, enhancing the mechanical-thermal stability of electrodes.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
25.
SUBMICRON SMALL-PARTICLE-SIZE LITHIUM-RICH MANGANESE-BASED PRECURSOR, PREPARATION METHOD THEREFOR, AND USE THEREOF
The present application provides a submicron small-particle-size lithium-rich manganese-based precursor, a preparation method therefor, and use thereof. The preparation method comprises the following steps: mixing a nickel source, a cobalt source, a manganese source, a doped metal source, an additive, and a solvent to obtain a mixed metal salt solution, the additive comprising a heteroatom-containing organic matter; and carrying out flame spray pyrolysis on the mixed metal salt solution to obtain the submicron small-particle-size lithium-rich manganese-based precursor. According to the preparation method of the present application, on the basis of flame spray pyrolysis, the heteroatom-containing additive is added into the mixed metal salt solution, so that the surface energy of particles is effectively adjusted, and the growth of a crystal nucleus is controlled, thereby obtaining submicron-grade small-particle-size lithium-rich manganese precursor spherical particles.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
26.
SURFACE-MODIFIED SODIUM ELECTRIC PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a surface-modified sodium electric precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) injecting a mixed solution A, a precipitant solution and a complexing agent solution into a base solution in a cocurrent flow manner, and performing a one-step co-precipitation reaction; and (2) switching the mixed solution A into a mixed solution B, and continuing to perform a two-step co-precipitation reaction to obtain a surface-modified sodium electric precursor, wherein the mixed solution A comprises a main metal element and a doped metal element, and the mixed solution B comprises a coating metal element. In the present application, the coating modification of the surface of precursor particles is achieved by means of a heterogeneous precipitation method, such that the coating layer is more uniform and complete, and the thickness and the components are adjustable, which is beneficial to improving the stability and electrochemical performance of the material. The preparation method involved in the present application is simple and easy to implement, and is easy for industrial application.
A method for preparing iron phosphate from lateritic nickel ore hydrometallurgical slag, which obtains a high-purity ferrous ferric oxide intermediate product by means of phase regulation-reduction roasting-magnetic separation, as well as wet leaching-co-precipitation, to prepare a high-purity iron phosphate product. This method realizes high-value utilization of iron in lateritic nickel ore hydrometallurgical slag, and better solves environmental problems caused by long-term storage and landfilling of lateritic nickel ore hydrometallurgical slag; the prepared iron phosphate product can be used for the preparation of lithium iron phosphate batteries, which has high economic benefits, and is conducive to promotion and application; moreover, the obtained non-magnetic substances can be used to produce building materials, cement and other additional products, and the filtrate from the precipitation reaction can be used to produce ammonium salt by-products, thereby further maximizing the utilization of lateritic nickel ore resources.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
29.
CORE-SHELL STRUCTURE TERNARY PRECURSOR MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a core-shell structure ternary precursor material, a preparation method therefor, and a use thereof. The core-shell structure ternary precursor material comprises a core and an outer shell, and further comprises a blocking layer between the core and the outer shell; the core comprises a first nickel-cobalt-manganese hydroxide, the outer shell comprises a second nickel-cobalt-manganese hydroxide, and the nickel content in the second nickel-cobalt-manganese hydroxide is less than the nickel content in the first nickel-cobalt-manganese hydroxide. The blocking layer in the core-shell structure ternary precursor material acts as a bridge between the core and the shell, and can hinder the separation of the core and the shell during a subsequent positive electrode material sintering process, thereby solving the phenomenon of stratification during the sintering process caused by a large difference in components in the core-shell material, improving the cycle stability and rate performance of a battery.
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
The present application provides a doped coated lithium-rich manganese-based positive electrode material, a preparation method therefor, and a use thereof. The preparation method comprises the following steps: (1) concurrently injecting a metal salt solution, a precipitant, and a complexing agent into a base solution, starting stirring, then concurrently injecting a molybdenum source solution, and carrying out a one-step coprecipitation reaction; (2) replacing the molybdenum source solution with a lanthanum source solution and carrying out a two-step coprecipitation reaction to obtain a modified lithium-rich manganese-based precursor; (3) mixing the modified lithium-rich manganese-based precursor with a lithium source and carrying out a one-step sintering treatment to obtain a primary sintered material; and (4) mixing the primary sintered material with an aluminum source and a calcium source and carrying out a two-step sintering treatment to obtain the doped coated lithium-rich manganese-based positive electrode material. The doped coated lithium-rich manganese-based positive electrode material prepared by the method of the present application has relatively high conductivity, exhibits good coulombic efficiency, and has excellent cycling stability and voltage decay resistance effect.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
31.
NICKEL-RICH POSITIVE ELECTRODE PRECURSOR, PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a nickel-rich positive electrode precursor, a preparation method therefor and a use thereof. The nickel-rich positive electrode precursor comprises a core, and a coating layer coated on a surface of the core; the core comprises a positive electrode precursor matrix material, and boron oxide and zirconium doped in the positive electrode precursor matrix material; along a direction from a center of the positive electrode precursor matrix material core to the surface, the doping amount of the zirconium gradually increases; coating elements in the coating layer comprise zirconium. In the present application, by means of directly doping boron oxide in the precursor, and in synergy and cooperation with gradient doping and coating of zirconium, the uneven surface stress distribution of the positive electrode material prepared subsequently is significantly reduced, the generation of microcracks is reduced, and the structure of the material is stabilized, thereby improving safety performance and electrochemical performance.
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
xabcde22, wherein 0.5 ≤ x ≤ 1, 0.1 ≤ a ≤ 0.4, 0.2 ≤ b ≤ 0.4, 0.01 ≤ c ≤ 0.2, 0.01 ≤ d ≤ 0.2, 0.2 ≤ e ≤ 0.5, and a + b + c + d + e = 1; Ni and Fe content gradually reduces from the center of the sodium battery inner core to the surface, while Cu, Zn, and Mn content gradually increases. Gradient doping is carried out on the sodium battery inner core of the sodium battery positive electrode material, and a Co coating layer is arranged on the surface thereof, thus significantly improving the stability of the layered oxide sodium battery positive electrode material, and facilitating widespread popularization and use.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
33.
CORE-SHELL SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
A core-shell sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) concurrent flow addition of a mixed solution A, an additive solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a one-step coprecipitation reaction; (2) switching the mixed solution A with a mixed solution B, and continuing to carry out a two-step coprecipitation reaction to obtain a core-shell sodium battery precursor; and (3) mixing the core-shell sodium battery precursor with a sodium source and carrying out sintering treatment to obtain the core-shell sodium battery positive electrode material; the mixed solution A comprises a main metal element, and the mixed solution B comprises a main metal element and an auxiliary metal element. Elemental components in the inner core and the outer shell are controlled via multi-step coprecipitation, the prepared core-shell structure material possesses high energy density, high safety and stability, etc., and the problems of quaternary or quinary phase separation, primary particles having no crystal form, and low tap density are solved.
A doped modified nickel-cobalt-manganese-sodium positive electrode material, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a doped metal M salt with a complexing agent solution to obtain an M- complexing solution; (2) injecting a nickel-cobalt-manganese mixed salt solution, a precipitant solution, ammonia and the M- complexing solution into a base solution in a concurrent flow mode, and carrying out coprecipitation reaction to obtain a precursor; and (3) mixing the precursor with a sodium source, and carrying out sintering treatment to obtain a doped modified nickel-cobalt-manganese-sodium positive electrode material. Compared with doping during sintering, directly doping the metal element in the precursor coprecipitation stage can simplify the preparation process of the positive electrode material, and can also reduce the cost consumption in material preparation.
22, wherein 0＜x≤0.6, 0＜y≤0.4, 0＜z≤0.7. The high-rate sodium battery precursor is a sodium-electric precursor material having a porous structure. The porous structure is beneficial to the transmission of sodium ions, and allows the sodium battery layered oxide material to have a lower migration barrier and a higher ion diffusion coefficient, such that high-rate charging and discharging of the sodium-ion battery can be achieved.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
Disclosed in the present invention are a method and system for determining an optimal discharge ore pulp concentration of a thickener. The method comprises: determining a first optimal discharge ore pulp concentration range of a thickener on the basis of the highest viscosity of an ore pulp; determining a second optimal discharge ore pulp concentration range of the thickener on the basis of the minimum scale removal period of a discharge pipe; determining a third optimal discharge ore pulp concentration range of the thickener on the basis of a feed ore pulp concentration of the thickener, a feed ore pulp density of the thickener, an effective volume of the thickener, a discharge amount, and an addition amount of a flocculant; and determining an optimal discharge ore pulp concentration range of the thickener. The beneficial effects of the present invention are as follows: a discharge ore pulp concentration of the thickener is constrained by means of discharge ore pulp viscosity control, scale removal period control and effective settling time control, and finally, the optimal discharge ore pulp concentration range of the thickener is obtained, so that the problems of a heavy pumping load, an excessively short scale removal period of the discharge pipe, and the overflow of the ore pulp, which are caused by an inappropriate discharge ore pulp concentration can be prevented, and the highest production efficiency and economic benefits can be achieved.
A method for electrolytic recovery of manganese using a post-second-stage nickel-cobalt precipitation liquid in laterite-nickel ore hydrometallurgy, comprising the following steps: using an alkaline neutralizer to adjust the pH value of a post-second-stage nickel-cobalt precipitation liquid in laterite-nickel ore hydrometallurgy to 7.8-8.2, then introducing air or oxygen for oxidation, and performing solid-liquid separation to obtain a manganese residue and a filtrate; using sulfuric acid to perform acid leaching on the manganese residue, and performing solid-liquid separation to obtain a manganese-containing leachate and a filter residue; using the alkaline neutralizer to adjust the pH value of the manganese-containing leachate to 6.0-6.5, carrying out primary impurity removal, and performing solid-liquid separation to obtain an iron-aluminum residue and a post-primary impurity removal liquid; adding a soluble sulfide into the post-primary impurity removal liquid, carrying out secondary impurity removal, and performing solid-liquid separation to obtain a nickel-cobalt-containing residue and a manganese-containing purified liquid; and electrolyzing the manganese-containing purified liquid so as to obtain manganese simple substance and a post-electrolysis liquid. The method recovers manganese from an originally waste post-second-stage nickel-cobalt precipitation liquid, thus achieving high economic value and benefits while reducing resource waste and environmental pollution.
C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
C25C 1/10 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of chromium or manganese
38.
APPLICATION OF SODIUM THIOSULFATE AS AUXILIARY AGENT FOR NICKEL-COBALT PRECIPITATION
Disclosed in the present invention is an application of sodium thiosulfate as an auxiliary agent for nickel-cobalt precipitation. The application comprises the following steps: (1) adding sodium thiosulfate to a solution after iron and aluminum removal, and stirring at 50-65°C to obtain a nickel-cobalt precipitation stock solution; (2) adding an alkali to the nickel-cobalt precipitation stock solution, adjusting the pH of a system to 7.0-7.4, and maintaining the pH to allow for sufficient precipitation of nickel and cobalt to obtain precipitate; and (3) washing the precipitate to obtain mixed hydroxide precipitate (MHP). In the present invention, sodium thiosulfate is used as the auxiliary agent for nickel-cobalt precipitation, and the precipitation rate of nickel and cobalt from the solution after iron and aluminum removal is promoted by means of the addition of the auxiliary agent, reducing the content of manganese in MHP product. The present invention has good economic value and is easy for industrial application.
An in-situ coated ternary positive electrode composite material, and the preparation and use thereof. The in-situ coated ternary positive electrode composite material comprises a ternary positive electrode base material and a fast ion conductor material, which is in-situ coated on and chemically bonded to the surface of the ternary positive electrode base material, wherein the ternary positive electrode base material is LiNi1-x-yCoxMnyO2, and the fast ion conductor material is Li2TiO3, where 0.02≤x+y≤0.67. By means of wet coating followed by lithium mixed sintering, the synchronous generation of an outer layer (Li2TiO3) and an inner layer (LiNi1-x-yCoxMnyO2) is realized, and the chemical bonding between the inner layer and the outer layer is achieved while the coating uniformity is improved, such that the coated lithium ion conductor Li2TiO3 is not prone to falling off during the charging and discharging of a battery, thereby finally improving the rate capability and the cycling performance of the ternary positive electrode composite material.
The technical solution of the present invention provides a preparation device for a neutralizing agent for a laterite nickel ore acid-leaching solution, comprising a preparation part, a buffer part, and a compartment part. The preparation part is used for mixing and preparing limestone slurry; the buffer part is used for storing the produced limestone slurry; and the compartment part has one end connected to the preparation part and the other end connected to the buffer part, and is used for stepwise pouring the slurry continuously produced by the preparation part into the buffer part and using the subsequently poured slurry to impact the previously stored slurry from the periphery. According to the present invention, the compartment part stepwise pours the limestone slurry prepared in the preparation part into the buffer part, and uses the subsequently poured slurry to impact the previously stored slurry from the periphery, namely, the stepwise injection forms impact on the stored limestone slurry, thereby avoiding excessive precipitation of the limestone slurry caused by long-time standing, guaranteeing the quality of the limestone slurry stored in the buffer part, and stabilizing the properties of the limestone slurry which serves as a neutralizing agent subsequently.
Disclosed in the present invention is a lateritic nickel ore pulp thickener, comprising a thickener body and a material pressing mechanism. The thickener body has a tapered accommodating cavity. The material pressing mechanism comprises a lifting/lowering plate, a plurality of vertical plates, a plurality of sieve plates, a lifting/lowering driving member, and a posture adjusting assembly. The lifting/lowering plate is arranged in the accommodating cavity. The vertical plates are all fixed under the lifting/lowering plate. Sieve holes are uniformly and densely formed in the sieve plates. The posture adjusting assembly is connected to the sieve plates and used for driving the sieve plates to rotate. The beneficial effects of the present invention are: the posture adjusting assembly drives the sieve plates to rotate until the sieve plates are perpendicular to the vertical plates, and the lifting/lowering driving member drives the lifting/lowering plate to descend; and at this time, the sieve plates move downwards, particles in ore pulp with a particle size smaller than the size of the sieve holes can directly pass through the sieve plates, while particles in the ore pulp with a particle size greater than the size of the sieve holes are intercepted by the sieve plates and move downwards along with the sieve plates, so that settling of the particles in the ore pulp can be accelerated, and the concentration rate of the ore pulp is increased.
Provided in a technical solution of the present invention is a multi-stage countercurrent washing system for the hydrometallurgical processing of a laterite nickel ore. The multi-stage countercurrent washing system comprises a plurality of stages of washing devices, overflow pipes and buffer tanks, wherein each buffer tank is arranged on the corresponding washing device, is connected to an overflow area of the washing device at the next stage by means of the overflow pipe, and is connected to a discharging pipe at the previous stage; an end of each overflow pipe that is connected to the corresponding buffer tank is located on an outer periphery of said buffer tank; and an end of each discharging pipe that is connected to the corresponding buffer tank is located at the top of said buffer tank to form a countercurrent between a slag phase and a washing liquid. In the present invention, by means of the buffer tanks, slag washing water at the next stage and the slag phase at the previous stage form a countercurrent, and primary first-stage solid-liquid impact-based separation is created, such that the washing liquid and materials are fully impacted. By means of a liquid injection pipe, the slag phase and the slag washing water which are impacted and mixed in a buffer pipe are injected from a position below a liquid level of the washing devices, and the slag phase in the washing devices is subjected to second-stage solid-liquid impact-based separation, such that the solid-liquid separation effect is improved.
A titanium-doped layered oxide material for a sodium-ion battery, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: mixing a nickel-iron-manganese salt solution, a precipitant solution, a complexing agent solution and a titanium source solution to perform a coprecipitation reaction, so as to obtain a precursor material of which primary particles are radially packed; mixing a sodium source and the precursor material and sintering same, so as to obtain the titanium-doped layered oxide material for a sodium-ion battery. The preparation method uses titanium doping and morphology regulation to improve the structural strength and cycle performance of the material, thereby improving lattice oxygen stability during the process of high-voltage deep desodiation, suppressing multiple phase transition reactions and also improving the plateau voltage and the energy density.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
44.
COBALT-COATED SODIUM ION BATTERY PRECURSOR, AND PREPARATION METHOD AND USE THEREFOR
A cobalt-coated sodium ion battery precursor, and a preparation method and use therefor. The cobalt-coated sodium ion battery precursor sequentially comprises, from inside to outside, a core, a transition layer and an outer coating layer. The core comprises a nickel-iron-manganese precursor material. The transition layer comprises a nickel-iron-manganese-cobalt precursor material. The coating layer comprises a cobalt hydroxide material. By carrying out gradient coating of cobalt on the nickel-iron-manganese core, cobalt is sequentially increased from inside to outside, such that the surface structure stability of the nickel-iron-manganese precursor is improved, side reaction between the electrode and the electrolyte is inhibited, and the use voltage and rate capability of the sodium-ion battery are effectively improved.
Disclosed is a method for continuously preparing mixed hydroxide precipitate from a laterite nickel ore by hydrometallurgy. Primary-precipitated mixed hydroxide precipitate particles are used as crystal nuclei, by controlling precipitation process conditions, the quantity of the crystal nuclei, and reaction time of the crystal nuclei, primary mixed hydroxide precipitate crystal nuclei gradually grow, and crystal forms become larger. By controlling the number of cycles, a proportion of returned seed crystals, and a homogenization ratio with precipitants, mixed hydroxide precipitate particles with narrow particle size distribution, dense particles, and better sedimentation effect are obtained, thereby reducing a moisture content of mixed hydroxide precipitate. The preparation method in this disclosure plays a certain guiding role in practical production and has good application prospects.
bxyz1-x-y-z22, wherein 0.4 ≤ b ≤ 1.2, 0.10 ≤ x ≤ 0.50, 0.10 ≤ y ≤ 0.50, 0.10 ≤ z ≤ 0.50; the coating layer comprises a composite oxide, and the composite oxide comprises two or more metal elements. The positive electrode material is coated with the composite oxide, which significantly improves the conductivity and stability of the positive electrode material, reduces contact between the positive electrode material and an electrolyte, inhibits the occurrence of side reactions, and improves the cycle performance of the material.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
47.
DOPED COATED SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
bxyzk22, where 0.6≤b≤1.2, x+y+z+k=1, 0.1≤x≤0.5, 0.01≤y≤0.10, 0.2≤z≤0.6, 0.1≤k≤0.5, and M comprises a transition metal element; and the shell comprises a transition metal oxide. As for the sodium battery positive electrode material, by means of doping, the stability of oxygen in the material is improved, and oxygen vacancies and structural recession are inhibited; and by means of being coated with a metal oxide shell, metal ions are prevented from being dissolved out, thereby improving the air stability and cycle performance of the material, such that the capacity retention rate of a battery can still reach 80% or above after 4000 cycles.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
48.
NICKEL-IRON-MANGANESE-ZINC PRECURSOR PREPARATION METHOD THEREFOR, AND USE THEREOF
A nickel-iron-manganese-zinc precursor, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: concurrent flow addition of a nickel-iron-manganese-zinc salt solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a coprecipitation reaction to obtain the nickel-iron-manganese-zinc precursor; wherein the complexing agent comprises sodium oxalate and/or sodium citrate. A certain amount of zinc is evenly doped in a metal layered oxide positive electrode material, and at least one among sodium oxalate and sodium citrate is selected during the preparation of the precursor to replace common the complexing agent aqueous ammonia, thus solving the problem of inconsistent precipitation speeds of ferrous ions with other metal ions when ammonia water is used as a complexing agent; simultaneously, the complexing speed is regulated and controlled by means of controlling reaction temperature, thus controlling metal ion precipitation speeds, thereby realizing further control of precursor morphology.
Disclosed in the present invention is a process for inhibiting silicon leaching during high-pressure leaching of laterite-nickel ore. The process comprises the following steps: performing first-stage high-pressure acid leaching on a laterite-nickel ore mixed ore slurry, and then performing second-stage medium-pressure acid leaching, the temperature of the first-stage high-pressure acid leaching being 230-260℃, and the temperature of the second-stage medium-pressure acid leaching being 150-200℃. In the present invention, high-pressure acid leaching is performed on laterite-nickel ore at a temperature of 230-260℃ to ensure that valuable metal nickel and cobalt can be effectively leached out while impurity metals such as iron and aluminum can be hydrolyzed as much as possible, and then second-stage medium-pressure acid leaching is performed at a temperature of 150-200℃ to promote hydrolysis of silicon to the maximum extent and greatly reduce the content of impurity silicon in the liquid obtained after leaching, thereby greatly reducing the content of silicon in subsequent MHP products, and further greatly improving the efficiency of an acid leaching procedure during the preparation of nickel sulfate crystals.
A nickel-cobalt-manganese ternary precursor having a high specific surface area, and preparation and a use thereof. The preparation comprises the following steps: S1, in an inert atmosphere, introducing in parallel a mixed metal salt solution containing nickel, cobalt and manganese, a strong alkaline solution, and ammonia water into a reaction kettle base solution, and carrying out a nucleation stage reaction in a coprecipitation process to obtain a first slurry containing seed crystals; S2, in the inert atmosphere, reducing the pH value in the first slurry by 1.0-2.0, carrying out stirring, and carrying out a stage I growth reaction to obtain a second slurry containing stage I crystal grains; and S3, in an oxygen-containing atmosphere, reducing the pH value in the second slurry by 0.4-0.6, carrying out stirring, and carrying out a stage II growth reaction to obtain a second slurry containing stage II crystal grains, wherein the stage II crystal grains are the nickel-cobalt-manganese ternary precursor having a high specific surface area, and the D50 of the stage I crystal grains is 1/2-4/5 of the D50 of the stage II crystal grains. The specific surface area of the nickel-cobalt-manganese ternary precursor is increased, and the structural uniformity of the nickel-cobalt-manganese ternary precursor is maintained.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
51.
APPARATUS FOR INCREASING SOLID-LIQUID RATIO OF THICKENER UNDERFLOW
The present invention relates to an apparatus for increasing the solid-liquid ratio of a thickener underflow, comprising an outer cylinder, a centrifugal assembly, and a backflow assembly. The centrifugal assembly comprises an inner cylinder, a screen, and a driving member. The inner cylinder is disposed in the outer cylinder and is rotationally connected to the outer cylinder; the screen is arranged at an opening formed in the outer wall of the inner cylinder; a feed port connected to an upper-stage thickener underflow and a lower-stage thickener overflow is formed in the top of the inner cylinder, a discharge port is formed in the bottom of the inner cylinder, and the outer wall of the inner cylinder above the screen is provided with an overflow port; the driving member is mounted on the outer cylinder, an output end of the driving member is connected to the inner cylinder; and the backflow assembly is communicated with the gap between the outer cylinder and the inner cylinder. Light and heavy ore particles can be separated so as to increase the solid content of ore pulp, thereby improving the washing efficiency of thickeners. The apparatus can decrease the number of stages of thickeners and reduce the water absorption ratio, thereby effectively saving costs.
Provided are a doped and coated sodium-ion positive electrode material, a preparation method therefor and a use thereof. The doped and coated sodium-ion positive electrode material comprises a core and a coating layer located on the surface of the core; the core comprises a nickel-iron-manganese sodium-ion positive electrode matrix and a titanium element doped in the nickel-iron-manganese sodium-ion positive electrode matrix; and the coating layer comprises a titanium-containing oxide. According to the provided sodium-ion positive electrode material, by synergistically combining bulk doping of titanium in the core with a titanium-containing oxide surface coating, the voltage decay is mitigated while the capacity is increased.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/50 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
H01M 4/52 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
53.
MAGNETIC SEPARATION APPARATUS FOR IRON-BEARING SUBSTANCES IN HYDROMETALLURGICAL TAILINGS FOR LATERITE NICKEL ORE
A magnetic separation apparatus for iron-bearing substances in hydrometallurgical tailings for a laterite nickel ore. The magnetic separation apparatus comprises: a tube (1) which is configured to allow tailings to be poured from the top end of the tube, wherein a plurality of vertical flat holes (101) running through the tube (1) are provided in an outer side of the tube (1); a magnetic separation member (2) comprising an electromagnetic plate (21) and a sliding sleeve (22), wherein the electromagnetic plate (21) is arranged in the flat hole (101), the sliding sleeve (22) is sleeved on an outer side of the electromagnetic plate (21) and can shuttle back and forth in the flat hole (101) along the electromagnetic plate (21), and by means of the electromagnetic plate (21), iron-bearing substances are magnetically attracted to the sliding sleeve (22) in an area where the electromagnetic plate overlaps with the sliding sleeve (22); a driving member (3) which is configured to drive the sliding sleeve (22) to shuttle back and forth in the flat hole (101); and a material guide member (4) which is configured to receive the iron-bearing substances which are brought out of the tube (1) by the sliding sleeve (22) and released from magnetic attraction and fall down.
A storage tank for neutralizer powder for a lateritic nickel ore acid leach solution, comprising a tank body (1) and a restoring apparatus (2). A feed port is formed in the top of the tank body, and a discharge port is formed in the bottom of the tank body. The restoring apparatus comprises a high-pressure air source (21) and a plurality of branch pipes (22); the high-pressure air source is located outside the tank body; the branch pipes penetrate through the tank body and are sealedly connected to the tank body; air inlet ends of the branch pipes are communicated with the high-pressure air source, air outlet ends of the branch pipes face upwards and are located in the tank body, and the air outlet ends of the plurality of branch pipes are distributed at intervals along the height direction. The storage tank is provided with the restoring apparatus, the high-pressure air source blows air into the tank body by means of the plurality of branch pipes, the branch pipes are distributed at intervals along the height direction, powder in an upper layer has the lowest density and is the first to be blown away, and after the powder in the upper layer is blown away, the pressure on powder in a lower layer is reduced and the powder can also be blown away by the airflow blown out from lower branch pipes, thereby restoring the powder in the entire storage tank to a fluffy state.
A drum-type ore washing device for a laterite nickel ore. The drum ore washing device comprises: a plurality of ore washing drums (1), a slurry intake structure (2), a plurality of driving mechanisms (3) and a water injection mechanism (4), wherein an ore washing cavity is formed in each ore washing drum (1); the slurry intake structure (2) is provided with a main conveying channel (21) and a plurality of material conveying channels (22), wherein a consistency measurement module (23) for measuring the consistency of slurry is provided in the main conveying channel (21); the plurality of driving mechanisms (3) are respectively connected to the plurality of ore washing drums (1); and the water injection mechanism (4) is arranged in each washing cylinder (1). The drum ore washing device for a laterite nickel ore can convey and wash, on the basis of the consistency condition of raw materials, the raw materials in a targeted manner; for a slurry with a large consistency, due to the high mud content, the slurry needs to be fed into a first-stage ore washing drum; and for a slurry with a relatively small consistency, the slurry is conveyed into a subsequent ore washing drum on the basis of a consistency setting condition of the slurry, thus reducing the number of ore washing steps relatively, ensuring that ores can be fully cleaned, and facilitating an increase in the ore washing efficiency.
B08B 3/02 - Cleaning by the force of jets or sprays
B08B 3/10 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
B08B 13/00 - Accessories or details of general applicability for machines or apparatus for cleaning
56.
REACTION KETTLE FOR NEUTRALIZATION AND IMPURITY REMOVAL OF LATERITE NICKEL ORE
The present invention belongs to the technical field of metallurgy. Disclosed is a reaction kettle for the neutralization and impurity removal of a laterite nickel ore. The reaction kettle comprises a kettle body, a feeding device, a detection device and a stirring device, wherein a plurality of reaction layers are formed inside the kettle body in a height direction of the kettle body; the feeding device comprises a plurality of output portions, wherein outlets of the plurality of output portions are respectively in communication with the plurality of reaction layers, and an inlet of each output portion is in communication with both a slurry conveying unit for conveying slurry and a neutralizer conveying unit for conveying a neutralizer, and a first valve and a second valve are provided between pipelines which are in communication with the slurry conveying unit and the neutralizer conveying unit; and the detection device is provided with a plurality of detection members, each reaction layer being internally provided with at least one detection member. The present invention provides layered control and adjustment of the pH value of the slurry in the kettle body, such that the pH value of the slurry at each position in the kettle body is kept within a proper range, thus avoiding large differences in pH values and local over-alkalinity.
A high-pressure leaching flash tank for a laterite nickel ore. The high-pressure leaching flash tank comprises a tank body, a buffer assembly and a stirring assembly, wherein a steam outlet is provided at an upper end of the tank body, a liquid discharge port is provided at a lower end of the tank body, and a liquid inlet is provided at a side portion of the tank body; the buffer assembly comprises a housing, a rotating shaft and an impeller, wherein the housing is arranged in the tank body, and is provided with a cavity and an inlet and an outlet which are in communication with the cavity; the outlet is located at the bottom of the housing, the inlet is connected to the liquid inlet, an upper end of the rotating shaft is rotationally mounted in the cavity, a lower end of the rotating shaft extends out of the cavity from the outlet, and the impeller is located in the cavity and connected to the upper end of the rotating shaft; and the stirring assembly is mounted at the lower end of the rotating shaft, and is configured to extend into a slurry. By providing the buffer assembly and the stirring assembly, the method can avoid scouring and abrasion of the tank body by a high-speed slurry; and a high-speed liquid flow can also be used to do work, so as to stir the bottom of the slurry.
A tank-type ore washer for a laterite nickel ore. The tank-type ore washer comprises a rack (1), a rotating shaft (2), a blade (3), a locking member (4) and a power device (6), wherein the rack (1) is provided with a washing tank (11); the rotating shaft (2) is rotationally mounted in the washing tank (11), and the rotating shaft (2) is provided with a cavity (23) and a slot (221) in communication with the cavity (23); a locking hole (321) is provided in one end of the blade (3), the blade (3) is adapted to the slot (221), and the end of the blade (3) provided with the locking hole (321) is inserted into the slot (221); the locking member (4) is movably mounted in the cavity (23) in a direction moving close to and away from the blade (3), such that when the locking member (4) is close to the blade (3), the locking member (4) passes through the locking hole (321), so as to limit separation of the blade (3) from the slot (221); and the power device (6) is connected to the rotating shaft (2) and configured to drive the rotating shaft (2) to rotate. Dismounting and mounting can be completed by means of driving the locking member (4), the replacement speed is high, the operation is simple, and the maintenance time of an apparatus is greatly shortened, so that the production efficiency is effectively increased.
A method for low-cost extraction and separation of battery-grade nickel and cobalt from laterite-nickel ore, comprising the following steps: adjusting a pH value of a laterite-nickel ore high-pressure leachate to 2.5 or above to obtain a leachate A; introducing the leachate A into a continuous ion exchange resin device to adsorb nickel to obtain a nickel-adsorbed resin and a resin adsorption tail liquid; desorbing the nickel-adsorbed resin to obtain a first nickel salt solution; performing extraction, washing and back-extraction on the first nickel salt solution by means of an extraction organic phase to obtain a battery-grade nickel solution of a target concentration; adding a reducing agent into the obtained resin adsorption tail liquid, adding a precipitant after the reaction to adjust the pH value of the resin adsorption tail liquid to 7-8, and performing pressure filtration to obtain a cobalt hydroxide intermediate product; and preparing a battery-grade cobalt salt solution of a target concentration by using the cobalt hydroxide intermediate product as a raw material. According to the method, nickel and cobalt are separated at an early stage of a metallurgical process, thereby solving the problem of a tedious process flow of nickel and cobalt extraction and separation, saving a large amount of usage of a flocculant and liquid alkali, and reducing costs.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
The present invention relates to a two-step extraction process for preparing battery-grade nickel from a laterite-nickel ore high-pressure leach solution, comprising the following steps: preparing an extraction organic phase; mixing the extraction organic phase with a laterite-nickel ore high-pressure leach solution having a pH value of 2-5 and performing extraction to obtain a first nickel-loaded organic phase; using a pickling acid to wash the first nickel-loaded organic phase to obtain a second nickel-loaded organic phase; using a first stripping acid to strip Ni from the second nickel-loaded organic phase to obtain a first-stage stripped solution; adding an acid solution to the first-stage stripped solution to prepare a second stripping acid, and introducing the second stripping acid into a stripping section for second-stage stripping to obtain a second-stage stripped solution; and subjecting the second-stage stripped solution to a saponification-based impurity removal extraction line to obtain a battery-grade nickel solution. In the present invention, the battery-grade nickel is prepared by utilizing a two-step extraction process of segmented stripping and subsequent saponification-based extraction and impurity removal. The problem that extraction agents are not acid-resistant is solved, and the concentration of nickel in the final stripped solution is guaranteed; in addition, by placing the extraction and impurity removal step at the end, nickel is effectively enriched, the subsequent crystallization cost is reduced, and the resulting nickel-enriched solution is purified.
Disclosed in the present invention is a method for recovering Mn, Mg, Ni, and Co from laterite-nickel ore tailings. The method comprises the following steps: adding concentrated sulfuric acid to an underflow from thickened laterite-nickel ore tailings for first-stage leaching to obtain a magnesium sulfate solution and tailings with magnesium preliminarily removed; slurrying the tailings with magnesium preliminarily removed and then adding concentrated sulfuric acid and hydrogen peroxide for second-stage leaching to obtain a crude manganese solution; adjusting the pH of the solution to 5-7 to undergo a reaction to remove impurities such as Fe, Al, Sc, and Si from the crude manganese solution, and carrying out pressure filtration to obtain a manganese solution subjected to preliminary impurity removal; and then adding a sulfide for deep impurity removal to remove Ni and Co, and carrying out filtration to obtain a qualified manganese electrolyte solution and cobalt nickel sulfide residue. The present invention creatively proposes a method for recovering Mn, Mg, Ni, and Co from laterite-nickel ore tailings. The recovery process does not need heating and has a small consumption of auxiliary materials, and a low cost. The extracted manganese sulfate solution can completely meet the requirements for electrolytic manganese.
Disclosed in the present invention is a method for reducing the water content of an MHP product of laterite-nickel ore and increasing the manganese content thereof. The method comprises the following steps: (1) using concentrated sulfuric acid to adjust the pH of a solution obtained after two-stage neutralization for iron-aluminum removal to 2-4.5; (2) adding hydrogen peroxide to the system of step (1) for reaction, upon completion of the reaction, adding an alkali to adjust the pH of the system to 6.5-7.5, and performing primary nickel-cobalt precipitation, so as to obtain a primary nickel-cobalt precipitate solution; and (3) settling in a thickener the primary nickel-cobalt precipitate solution of step (2), and performing pressure filtration on a bottom flow obtained after the thickening, so as to obtain an MHP product. By means of jointly controlling the pH of the solution obtained after two-stage neutralization for iron-aluminum removal and the amount of hydrogen peroxide, the present invention can obviously increase the manganese content in MHP; additionally, the method will not additionally introduce other impurities and can obviously reduce the water content of the MHP product, thus reducing the volume and freight charges, and solving the industrial technical problem of high water contents of MHP.
Provided are a modified P2-type sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: concurrent flow addition of a nickel-manganese salt solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a coprecipitation reaction to replace the nickel-manganese salt solution with a cobalt salt solution; continuing to carry out a coprecipitation reaction to obtain a sodium battery precursor; mixing and sintering the sodium battery precursor and a sodium source, and separately coating a carbon layer and a metal oxide. The modified P2-type sodium battery positive electrode material prepared using the present method is a P2-type manganese-based layered oxide structure; the battery has excellent cycle performance, rate capability, and material stability, the battery can reduce side reactions with the electrolyte at high potentials, lowers material dissolution and electrolyte consumption, and improves the cycle performance of a material.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
65.
MODIFIED LITHIUM-RICH MANGANESE-BASED POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
Provided in the present application are a modified lithium-rich manganese-based positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) cocurrently injecting a mixed metal salt solution, a precipitant and a complexing agent into a base solution, and performing a primary coprecipitation reaction; (2) stopping injecting the mixed metal salt solution, cocurrently injecting a manganese salt solution, the precipitant and the complexing agent into the reaction solution, carrying out a secondary coprecipitation reaction, and performing low-temperature pre-sintering treatment on the obtained particles, so as to obtain a modified precursor; and (3) mixing the modified precursor with a lithium source, and performing sintering treatment to obtain the modified lithium-rich manganese-based positive electrode material. The present application can improve the structural stability of the interior of the material while ensuring a high specific surface area of the lithium-rich manganese-based positive electrode material. In addition, the spinel-phase manganese oxide can prevent performance deterioration of the material during charging and discharging processes.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
66.
COMPREHENSIVE RECYCLING METHOD FOR LATERITE NICKEL ORE HYDROMETALLURGICAL SLAG
A comprehensive recycling method for laterite nickel ore hydrometallurgical slag. The method is mainly to perform operations such as acid leaching, alkali leaching, and calcining on laterite nickel ore hydrometallurgical slag, and in the process of recovering iron concentrates and/or iron phosphate products, sodium silicate, calcium sulfate, magnesium oxide, and aluminum oxide products can also be recovered, so that comprehensive recycling of the laterite nickel ore hydrometallurgical slag is achieved to the maximum extent, thereby achieving comprehensive development and utilization of laterite nickel ore resources; and the method results no three-waste emissions, the process is green and environment-friendly, and the method is simple and feasible, and is conducive to popularization and application.
0.67xy(1-x)(1-y)(1-x)22; wherein 0＜x≤0.01, 0.2≤y≤0.4, and the M element comprises any one or a combination of at least two of Zn, Mg, Cr, Ti or Al. The provided P2 type nickel-manganese binary sodium battery positive electrode material, by means of doping and modification of specific metal elements, can reduce the capacity degradation rate in the battery cycling process, and prolong the service life of the battery. In addition, the preparation process is simplified, the raw material cost is reduced, the economic benefit is improved, and commercial application is facilitated.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
68.
COPPER-IRON-MANGANESE-BASED SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD AND USE THEREFOR
A copper-iron-manganese-based sodium battery positive electrode material, and a preparation method and use therefor. The preparation method comprises the following steps: mixing a copper-iron-manganese-based precursor, a sodium source, a transition metal source and a solvent, removing the solvent, and sintering, so as to obtain the copper-iron-manganese-based sodium battery positive electrode material. The preparation method can achieve doping and coating of the positive electrode material in one step, specifically, metal ions are doped into the positive electrode material, the surface of the positive electrode material is coated with a metal fast ion conductor layer, such that the cycling stability, the gas generation performance and the sodium ion conductivity of the positive electrode material are improved, and the sliding of the inner core transition metal layer is also inhibited.
A treatment method for laterite nickel ore by curing and roasting-water leaching-atmospheric pressure acid leaching is provided. The treatment method includes the following steps: mixing a laterite nickel ore dry powder, concentrated sulfuric acid, and sodium fluoride uniformly, performing curing and roasting under a reducing atmosphere to obtain a cured material; performing water leaching on the cured material to obtain a water leaching solution and a water leaching slag after filtration; and performing atmospheric pressure acid leaching on the water leaching slag to obtain an acid leaching solution and an acid leaching slag after filtration.
A process and system for recovering manganese from a high-pressure leaching system of laterite nickel ore, including the following steps: S1. adding limestone to the high-pressure leaching solution of the laterite nickel ore for pre-neutralization to obtain first-stage carbon dioxide and a neutralization solution, adding limestone for precipitation of iron and aluminum to obtain second-stage carbon dioxide and a slurry, and adding liquid alkali to the slurry for precipitation of nickel-cobalt-manganese to obtain nickel-cobalt-manganese hydroxide and a nickel-cobalt-manganese precipitated lean solution; S2. collecting first-stage carbon dioxide and second-stage carbon dioxide and passing same into a nickel-cobalt-manganese precipitated lean solution, adjusting the pH value of the nickel-cobalt-manganese precipitated lean solution to 5-6.5 by liquid alkali, and then performing a precipitation reaction to obtain a crude manganese carbonate; S3. dissolving the crude manganese carbonate with sulfuric acid to obtain a dissolution liquid and third-stage carbon dioxide, then removing calcium and magnesium from the dissolution liquid to obtain a manganese sulfate solution and then evaporating and crystallizing to obtain manganese sulfate crystals; recycling the third-stage carbon dioxide and introducing same into a nickel-cobalt-manganese precipitated lean solution; the recovery rate and utilization rate of manganese is high, and the carbon emission from laterite nickel ore leaching process is reduced.
A wastewater treatment process in the production of nickel cobalt hydroxide includes the following steps: S1. subjecting a laterite nickel ore acid-leaching solution successively to iron-aluminum removal and nickel-cobalt precipitation to obtain wastewater; S2. subjecting the wastewater successively to chromium ions, manganese ions, and silicon ion removal treatments to obtain a suspension; and S3. reusing portion of the suspension and continuing iron-aluminum removal; subjecting the remaining suspension successively to homogenizing, alkali adjusting, standing still, CCD counter-current washing, and solid-liquid separation to obtain a supernatant and a residue phase, collecting the residue phase, and discharging the supernatant after neutralization. This method used to treat the laterite nickel ore wastewater can meet the discharge standard, with high safety.
C02F 1/64 - Heavy metal compounds of iron or manganese
C02F 1/66 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
C02F 1/70 - Treatment of water, waste water, or sewage by reduction
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
C02F 1/00 - Treatment of water, waste water, or sewage
C02F 101/20 - Heavy metals or heavy metal compounds
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
72.
High-pressure reactor acid adding system for laterite nickel ore hydrometallurgy
A high-pressure reactor acid adding system for laterite nickel ore hydrometallurgy includes: an acid liquor supply tank, an acid adding pipe, an acid adding pump, a pressure stabilizer, and a high-pressure reaction kettle, where one end of the acid adding pipe is communicated with the high-pressure reaction kettle, the other end thereof is communicated with the acid liquor supply tank, and the acid adding pump is disposed on the acid adding pipe and is configured to pressurize and pump acid liquor in the acid liquor supply tank to the high-pressure reaction kettle through the acid adding pipe; and the pressure stabilizer is disposed on the acid adding pipe and is configured to dynamically accommodate or discharge the acid liquor, to reduce pressure fluctuation in the acid adding pipe. Compared with the prior art, according to this disclosure, the pressure stabilizer is disposed on the acid adding pipe.
A method for green and low-cost extraction of nickel-cobalt from laterite nickel ore includes: (1) iron removing pretreatment: adding an iron removing agent to a high-pressure leaching solution of the laterite nickel ore to reduce an iron concentration to less than 0.2 g/L to obtain a laterite nickel ore leaching solution; (2) nickel adsorption: adsorbing and enriching nickel in the laterite nickel ore leaching solution using a first resin adsorption process to obtain a nickel adsorption resin and a nickel adsorption tail liquid; wherein the nickel adsorption resin is desorbed to obtain a crude nickel solution; (3) cobalt adsorption: subjecting the nickel adsorption tail liquid to cobalt adsorption and enrichment by a second resin adsorption process to obtain a cobalt solution by desorbing; (4) copper adsorption: subjecting the crude nickel solution to a third resin adsorption process for removing copper to obtain a purified nickel solution.
B01D 15/18 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns
B01D 15/20 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
B01D 15/42 - Selective adsorption, e.g. chromatography characterised by the development mode, e.g. by displacement or by elution
C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
74.
Automatic descaling system for high-pressure reactor of laterite nickel ore
Disclosed is an automatic descaling system for high-pressure reactor of laterite nickel ore, which comprises a high-pressure reactor, multiple mixing devices, multiple detection devices, and a scale removal assembly; within the reactor, multiple partition plates are arranged sequentially along the material flow direction, dividing the internal cavity of the reactor into multiple compartments. Multiple mixing devices are correspondingly installed within the multiple compartments, and multiple detection devices are correspondingly installed in the multiple compartments as well. The scale removal assembly comprises an acid storage tank, multiple first connecting pipes, and multiple first control valves. Multiple first control valves are correspondingly installed on the multiple first connecting pipes. This disclosure finely adjusts the amount of acid injected based on the thickness of the scale, not only achieving a better descaling effect but also correspondingly reducing the usage of acid, thereby lowering the production costs for enterprises.
A dynamic optimization method for acid-to-ore ratio in high-pressure leaching of laterite nickel ore includes: obtaining a feed ore composition, a pulp concentration, a pulp flow rate, a leaching temperature and a pulp duration time in an autoclave, and setting a target leaching rate of nickel; setting a flow rate of sulfuric acid; obtaining a relationship between a hydrogen ion concentration in a solution and a reaction time; obtaining a theoretical leaching rate of nickel when a leaching time reaches the pulp duration time in the autoclave; comparing the theoretical leaching rate of nickel with the target leaching rate of nickel; adjusting the set flow rate of the sulfuric acid until the theoretical leaching rate of nickel is equal to the target leaching rate of nickel, calculating a corresponding optimal acid-to-ore ratio; and adjusting an opening degree of a sulfuric acid flow regulating valve of the autoclave.
Disclosed is a limestone slurry and lime milk preparing device for hydrometallurgy of laterite nickel ore, comprising a limestone slurry preparation assembly and a lime milk preparation assembly. The limestone slurry preparation assembly comprises a first feeding machine, a grinding mill, a mixing machine, a first transfer pump, and a first buffer tank, connected sequentially. When the weight of the limestone slurry in the first buffer tank is not within a first preset range, the first feeding machine, grinding mill, mixing machine, and first transfer pump can adjust their respective operating speeds. The lime milk preparation assembly comprises a lime kiln, a second feeding machine, a nitrifying machine, a third transfer pump, and a second buffer tank, connected sequentially. The entire production line can respond in coordination, with overall automated adjustment of production efficiency and a high level of intelligence.
B01J 8/08 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
B01J 8/10 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles
Disclosed is a combined heat exchange system of flash tank and preheater for laterite nickel ore leaching. The system comprises a high-pressure reactor, preheating towers, and flash tanks. The preheating tower is connected to the feed inlet of the high-pressure reactor. The flash tank is connected to the discharge outlet of the high-pressure reactor, and it is also connected to the preheating tower. Inside the flash tank, there is a pressure relief chamber and a buffering mechanism. The buffering mechanism comprises a buffering component and a connecting structure that are interconnected. In this disclosure, the buffering component of the pressure relief chamber is equipped with a central bulge and a buffering tank, materials falling from the pressure relief chamber can sequentially pass over the central bulge and slide from one end of the buffering tank to the other, then slide upwards out of the tank, achieving a buffering effect.
A system for optimizing duration time of high-pressure leaching of laterite nickel ore, includes a data collecting module, an actual duration time calculating module configured to obtain an actual duration time of the pulp in the autoclave during the high-pressure leaching process, an optimal duration time determining module configured to obtain an optimal duration time corresponding to a maximum income value, according to the qualities of the pulp, and a duration time control module configured to compare an actual duration time with the optimal duration time under this condition, and control opening degrees of a feed valve and a discharge valve of the autoclave by using a feedback control system, to ensure the actual duration time of the pulp in the autoclave is within the optimal duration time all the time.
Disclosed is a treatment system for the slag phase after removing iron-aluminum-chromium from leaching solution of laterite nickel ore, comprising a filtering module, a refining module, a feeding module, and a measurement module. The filtering module comprises a material suction component and a filtering assembly. The filtering assembly is connected to the outlet of the material suction component and features a filter residue outlet and a filtrate outlet. The refining module is connected to the filter residue outlet. The feeding module consists of a material pipe and a material guiding drive component. The material pipe has an inlet end connected to the outlet of the refining module. This setup enables the timely filtration of the generated slag phase, followed by refinement processing, and allows for the controlled metering of the returned filter residue. Consequently, it enhances the subsequent acid leaching and dissolution efficiency of the slag phase.
Disclosed is a precipitation system for hydrometallurgical processing of laterite nickel ore, comprising a reaction tank, a feeding assembly, and a discharging assembly. Inside the reaction tank, there is a holding chamber; the feeding assembly comprises a first inlet pipe and a second inlet pipe; the discharging assembly comprises a material lifting pipe and a gas conduit; the gas conduit extends into the material lifting pipe below the liquid level. By introducing gas into the material lifting pipe through the gas conduit, bubbles are entrained in the solid-liquid mixture within the material lifting pipe, the liquid level within the material lifting pipe rises, ultimately causing the solid-liquid mixture at the bottom of the holding chamber to be discharged through the material lifting pipe. This allows for the direct extraction of precipitates from the bottom of the holding chamber, extending the period between manual cleanings of the reaction tank.
Disclosed is a system and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore, the system comprises an autoclave, a subsequent processing equipment, and a control device; the autoclave comprises a kettle body, a first feeding pipe, a second feeding pipe, and a discharge pipe, the subsequent processing equipment is connected to the discharge pipe and is used to process the reactants; the control device comprises a first valve, a second valve, a first pressure sensor, a second pressure sensor, an aluminum ion detection device, and a control unit. This disclosure can maintain the aluminum ion concentration in the leachate within an appropriate range, effectively reducing fluctuations in the production process, achieving stable production, and lowering production and maintenance costs.
The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method therefor, and a use thereof. The preparation method comprises the following steps: adding a mixed metal salt solution, a precipitant solution, a complexing agent solution, and an anion solution to a base solution in parallel, and performing a coprecipitation reaction to achieve a first target particle size; and continuing to add a ferrous sulfate solution, a diammonium hydrogen phosphate solution, the complexing agent solution, and the anion solution in parallel, performing a coprecipitation reaction to achieve a second target particle size, and performing solid-liquid separation, washing, and drying to obtain the sodium-ion battery precursor, wherein metal salts in the mixed metal salt solution include a nickel salt, a ferrous salt, a copper salt, a manganese salt, and a salt modified by means of doping; and the salt modified by means of doping includes a zirconium salt and/or a tungsten salt. By means of the use of the salt modified by means of doping and the anion solution, the sodium-ion battery precursor provided by the present application prevents an irreversible phase change, thereby improving the structural stability, so that the electrochemical performance of a corresponding positive electrode material is improved.
2 2 ab1-a-b-cc22; wherein 0.1≤a＜0.5, 0.2≤b＜0.4, 0＜c＜0.08. The sodium battery positive electrode material can reduce the difficulty in embedding and removing sodium ions, increase the transportation and diffusion rate of same, such that the specific capacity of the battery is improved, the stability of the material crystal structure is improved, the cycle performance of the battery is improved, the service life of the battery is prolonged, and large-scale promotion and application are facilitated.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
84.
ANION-CATION DUAL-DOPED BATTERY PRECURSOR, POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD AND USE
The present application relates to an anion-cation dual-doped battery precursor, a positive electrode material, a preparation method and a use. The preparation method comprises the following steps: mixing a precipitant solution, a complexing agent solution, a boron source solution and a mixed salt solution, subjecting the resulting mixture to a coprecipitation reaction until a target particle size is reached, and performing solid-liquid separation, washing and drying, so as to obtain the anion-cation dual-doped battery precursor. In the present application, by means of dual doping with molybdenum cations and boron anions, the electrochemical performance of the obtained anion-cation dual-doped battery precursor is improved; moreover, by means of a mode of feeding the mixed salt solution and the boron source solution, redundant procedures are reduced, the preparation cost is reduced, and the content of Mo and B can be stabilized, thereby achieving uniform doping with Mo and B.
The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method, and a use. A complexing agent solution used for preparing the sodium-ion battery precursor comprises a first complexing agent and a second complexing agent, wherein the first complexing agent comprises any one of or a combination of at least two of oxalic acid, sodium oxalate, or potassium oxalate, and the second complexing agent comprises any one of or a combination of at least two of citric acid, sodium citrate, or potassium citrate. In the present application, by providing the specific complexing agents, the prepared sodium-ion battery precursor has a relatively high specific surface area, thereby facilitating the intercalation of sodium ions when sintering and preparing a positive electrode material, so that the electrochemical performance of the sodium-ion battery positive electrode material can be significantly improved.
A preheating device and method for a high-pressure leaching system for laterite nickel ore, belonging to the technical field of metallurgy. The preheating device comprises a preheater (1), a steam turbine (2), a generator (3), a first-stage heater (4) and a second-stage heater (5). The first-stage heater (4) is provided with a first feeding end (41) connected to an ore pulp feeding pipe, and a first discharging end (42) connected to a second feeding end (51) of the second-stage heater (5). The second-stage heater (5) is provided with a second discharging end (52) connected to a third feeding end (11) of the preheater (1). A steam inlet (21) of the steam turbine (2) is communicated with a steam outlet (12) of the preheater (1). The steam turbine (2) is connected to the generator (3), a steam discharge end (22) of the steam turbine (2) being connected to the first-stage heater (4) so as to provide the first-stage heater (4) with a heat source by using discharged steam as a heating medium for raw materials. The generator (3) is connected to the second-stage heater (5) so as to supply power to the second-stage heater (5). The preheating device can use generated steam cyclically to enable ore pulp to be rapidly heated to a set temperature, thereby saving energy and lowering costs.
The technical solutions of the present invention provide a whole-zone coordinated water supply system, comprising water supply units and a balance unit. Each water supply unit is arranged close to a water use end, communicates with a main water supply line, and is used for storing a water source and directly conveying the stored water source to the water use end. The balance units are arranged between the plurality of water supply units and are used for communicating adjacent water supply units. In the present invention, by using the water supply units for storing the water source at positions close to water use devices, buffer spaces are provided at the ends of the water supply line, and pressure differences and flow fluctuation generated in the water pipeline are counteracted, such that the water use devices are stably supplied with water. When a single water supply unit experiences a reduced water use rate, and the water use rate is greater than the water supply rate, by means of the balance units and the nearby water supply units, the stored water source is conveyed to the water supply unit, so that multiple paths of water supply supplement is formed, the insufficient water supply rate is replenished in time, and the water supply stability for the water devices is maintained.
A multi-stage hybrid high-pressure reactor for high-pressure leaching of nickel laterite, belonging to the technical field of metallurgy. The multi-stage hybrid high-pressure reactor comprises a reactor body (1), a plurality of overflow assemblies (2) and a plurality of flow guide members (3). A material inlet pipe (11) and a material outlet pipe (12) are respectively arranged at the two ends of the reactor body (1). The plurality of overflow assemblies (2) is sequentially arranged in the reactor body (1) in the material flowing direction, so as to divide the inside of the reactor body (1) into a plurality of reaction areas (13). Each overflow assembly (2) comprises a first overflow plate (21), a second overflow plate (22) and a material pushing member (23). The material pushing member (23) is provided with a material pushing end arranged between the first overflow plate (21) and the second overflow plate (22). The plurality of flow guide members (3) is arranged at the overflow outlets (221) in a one-to-one correspondence manner. The reactor can promote the flowing and mixing of materials, so that the materials do not easily sink to the bottom. By promoting the flow of the materials, scaling can be delayed, and the slurry mixing and reaction efficiency can be improved.
Disclosed is cylindrical ore washer for hydrometallurgical smelting of laterite nickel ore, comprising a mounting bracket, a screening component, a regulator, and an ore-washing component. The screening component comprises a frame, a cylinder body, a screening cylinder, and a driving component. The cylinder body is rotatably mounted on the frame along an axis oriented in a first direction. The screening cylinder is housed within the cylinder body, with a feed inlet and a discharge outlet located at opposite ends along the first direction, respectively. The cylindrical wall of the screening cylinder is provided with multiple screen holes, and an inner side wall of the screening cylinder protrudes to form a baffle plate. This disclosure is capable of impeding the movement of ore towards the discharge outlet, thereby prolonging the residence time of the ore within the screening cylinder and enhancing both the ore-washing efficiency and cleaning effectiveness.
The present disclosure discloses a system for preparing new energy Ni—Co—Mn raw material from laterite nickel Ore. The system includes a raw auxiliary material supply module, a leaching reaction module, a neutralization and purification module, a neutralization and purification module, a Ni—Co—Mn mixed hydroxide synthesis module, a valuable metal recovery module, a crystal manufacturing module, a ternary precursor manufacturing module, and a ternary positive material manufacturing module. The present disclosure overcomes the defects of prior art and process, and is a green technology and process for simultaneous extraction of nickel, cobalt and manganese from low-grade laterite nickel ore, which not only realizes simultaneous and efficient extraction of nickel, cobalt and manganese, but also adopts energy-saving and emission reduction green technology and clean production technology to effectively recycle and safely dispose of waste water, waste residue and waste gas.
Provided are a cobalt-bromine co-coated positive electrode material, and a preparation method and use therefor. Metal salt solutions with different concentration gradients are used, such that NFM ternary precursors with different ferronickel concentration gradient distributions in the radial direction can be prepared, and the content of the metal nickel is gradually reduced from inside to outside. Then, the surface of the ternary precursors is coated with cobalt ions and bromine ions by using an atomic layer deposition technique, so as to obtain a cobalt-bromine co-coated sodium ion battery positive electrode material having low cost, high rate and high stability.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/1391 - Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
93.
HIGH-PRESSURE ACID LEACHING TEST SYSTEM FOR LATERITE NICKEL ORE ACID
A high-pressure acid leaching test system for a laterite nickel ore acid, comprising a reaction kettle (100) and a feeding assembly (200). The feeding assembly (200) comprises two feeding boxes (210), two door plates (220), and two discharging members (230); the two door plates (220) are hingedly connected to openings formed in the bottoms of the two feeding boxes (210), respectively, and are used for opening and closing the openings; the two feeding boxes (210) are fixedly connected; the two feeding boxes (210) are slidably and sealedly connected to through grooves formed in the reaction kettle (100); when one of the feeding boxes (210) slides till the door plate (220) at the bottom of the feeding box (210) is located in the reaction kettle (100), the other feeding box (210) slides till the door plate (220) at the bottom of the feeding box (210) is located outside the reaction kettle (100); the two discharging members (230) are respectively arranged in the two feeding boxes (210) and can move through the openings in the vertical direction; and the discharging members (230) are used for carrying laterite nickel ores. In the moving process of the feeding boxes (210), it can be guaranteed that the reaction kettle (100) is always in a high pressure state during material changing, and pressure relief is not needed, so that the test cycle is effectively shortened; moreover, the removal of a solid phase in the previous reaction and the feeding step of the laterite nickel ores in the next reaction are synchronously carried out, so that the test cycle is further shortened.
An ore pulp thickening system for laterite-nickel ore, the system comprising an extrusion-type thickening device (1), a speed measurement system (2), and a control system (3), wherein the extrusion-type thickening device (1) comprises an inner barrel (11), an outer barrel (12) and a thickening mechanism (13), the inner barrel (11) is vertically arranged inside the outer barrel (12), has an upper part connected to an ore pulp feeding pipe (111) and a lower part connected to an ore pulp discharging pipe (112), and is provided with a concentration sensor (114), and a filtering surface is formed on a surface thereof; the speed measurement system (2) comprises a first speed measurement device (21) and a second speed measurement device (22) which are respectively arranged on the ore pulp discharging pipe (112) and a water drainage pipe (113); and the control system (3) comprises a first controller (31) and a second controller (32), and the first controller (31) is electrically connected to the speed measurement system (2) and a feeding valve (116). The system enables efficient concentration of ore pulp so as to save on the area occupied by apparatuses and costs.
Disclosed is a turbulent structure of a reactor, the turbulent structure comprising a reactor body (1), a main shaft (2), and a drive assembly (5), wherein the main shaft (2) is rotatably connected to the reactor body (1) and is provided with a shaft rod (201) transversely extending at a bottom end thereof, a transmission member (3) is arranged between the shaft rod (201) and the interior of the main shaft (2), a propeller-type agitator (4) is provided at an output end of the transmission member (3) to drive the propeller-type agitator (4) to rotate, the propeller-type agitator (4) rotates eccentrically around the central axis of the main shaft (2), and the propeller-type agitator (4) is used for propelling fluid upward. The main shaft (2) and the shaft rod (201) drive the propeller-type agitator (4) to perform a circular motion around the axis of the main shaft (2), expanding the area for upward agitation at the bottom, thereby creating a fluid motion inside the reactor body (1) with upward floating on one side and gradual sinking on the other side, resulting in a differential speed between the two sides of the reactor body (1). During rotation, when a blade moves into the differential region of sinking, the upward-floating fluid collides with the sinking fluid, resulting in turbulence.
A high-pressure leaching reaction kettle and a control method therefor. The high-pressure leaching reaction kettle comprises a kettle body (1), a plurality of stirring mechanisms (2), and a plurality of baffle assemblies (3). Each stirring mechanism (2) comprises a stirring rod (21), a stirring drive member (22), a plurality of stirring blades (23), and a plurality of pressure measurement members (24), each pressure measurement member (24) being disposed on one stirring blade (23) and being used for measuring the pressure on the blade surface of the corresponding stirring blade (23) during rotation; and each baffle assembly (3) comprises a fixed baffle (31), a telescopic baffle (32), and a baffle height adjustment member (33). The technical solution has the beneficial effects of enabling determination of whether ore slurry has been uniformly mixed in each mixing cavity, and when the ore slurry is uniformly mixed, lowering the height of the telescopic baffle (32) so as to actively reduce the residence time of the ore slurry in each mixing cavity, thereby improving production efficiency while ensuring uniform mixing, and achieving a balance between the leaching reaction rate and the overall production efficiency.
A vanadium gradient doped sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) mixing a vanadium source and a complexing agent solution to obtain a vanadium-containing mixed solution, conducting concurrent flow addition of a nickel-copper-iron-manganese mixed salt solution, the vanadium-containing mixed solution, a precipitating agent solution, and a complexing agent solution into a base solution, performing a co-precipitation reaction, and obtaining a sodium battery precursor; and (2) mixing the sodium battery precursor with a sodium source, performing sintering, and obtaining the vanadium gradient doped sodium battery positive electrode material; wherein during the co-precipitation reaction, the feed rate of the vanadium-containing mixed solution gradually increases while the feed rate of another solution remains unchanged. By means of first dissolving a vanadate in a complexing agent and then carrying out precipitation during a reaction, wet preparation of a vanadium-doped precursor is implemented, and by means of vanadium gradient doping, the prepared positive electrode material acquires better long cycle performance.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
98.
COATING-MODIFIED IRON-COPPER-MANGANESE-BASED PRECURSOR, PREPARATION METHOD THEREFOR, AND USE THEREOF
abc22, and then using the coprecipitation method again for a coating reaction to obtain the coating-modified iron-copper-manganese-based precursor coated with a zirconium source and an aluminum source. The addition of zirconium can improve the stability of a positive electrode material in a high-voltage area, and the addition of aluminum can improve the cycling performance of the positive electrode material. The synergistic effect of zirconium and aluminum ensures the electrochemical performance of the obtained coating-modified iron-copper-manganese-based precursor. In addition, the preparation method is simple to operate, the obtained coating layer is uniform, and the coating amount is controllable. The preparation method is suitable for industrial production.
Provided are a cathode material for sodium-ion batteries, a preparation method therefor, and an application thereof, and the preparation method comprises the following steps: (1) mixing a nickel source, a manganese source, and a magnesium source to obtain a ternary salt solution, adding the ternary salt solution, a precipitating agent, a complexing agent, a boron source solution, and an organic additive to a reaction vessel in parallel flow, and performing a reaction to obtain a B-doped radially-packed hydroxide precursor; and (2) mixing the B-doped radially-packed hydroxide precursor obtained in step (1) with a sodium source, and performing sintering treatment to obtain the cathode material for sodium-ion batteries. In the present application, the chemical composition (B-doping) and microscopic morphology (radial-packed arrangement of primary particles) of the cathode material are synergistically modified and regulated by optimizing the co-precipitation process, so as to improve the element distribution uniformity, structure stability, cycle performance, rate capability, and production efficiency of the cathode material for sodium-ion batteries simultaneously.
C01G 53/50 - Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
H01M 10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
100.
CARBON-COATED LITHIUM-RICH MANGANESE-BASED POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01G 11/34 - Carbon-based characterised by carbonisation or activation of carbon
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
