Abstract

xxx, preparing concentrated nitric acid, preparing the nitric acid solution, and returning the nitric acid solution as the leaching agent. The method can achieve the effective separation of iron from nickel-cobalt, reduces the content of metals, such as aluminum and magnesium, in a nickel-cobalt product, reduces the use of a neutralizing agent, achieves the renewable use of a nitric acid, and greatly improves the comprehensive utilization efficiency and the economic value of the laterite nickel ore.

IPC Classes  ?

• C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions

Abstract

Disclosed in the present invention is a method for treating low-magnesium limonite type laterite nickel ore. The method specifically comprises the following seven steps: ore grinding pretreatment, nitric acid pressure leaching, neutralization for removing iron and aluminum, neutralization for precipitating nickel and cobalt, recovery of nickel and cobalt by resin column, ratio adjustment for solution, and evaporating concentration and drying. The selective use of a leaching agent and a pH regulator in a synergistic cooperation treatment process enables all steps in the whole process synergistically cooperate with each other so as to implement efficient and sufficient leaching and recovery of cobalt and nickel in the laterite nickel ore, and enables chemical agents added in the treatment process to cooperate with calcium and magnesium metals in the laterite nickel ore so as to all convert into a directly recyclable calcium magnesium nitrate mixed fertilizer, thereby implementing completely full utilization and treatment of resources, and solving the difficult problem in the past of comprehensive utilization of the low-magnesium limonite type laterite nickel ore. Moreover, substances discharged in the entire treatment process are all directly recyclable products, and no waste water/waste residue/waste gas is discharged. The method has simple and easily-controlled treatment steps, low energy consumption, low costs, and high industrial practical values.

IPC Classes  ?

• C22B 23/00 - Obtaining nickel or cobalt
• C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical 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
• C01F 5/38 - Magnesium nitrates
• C01F 11/36 - Nitrates
• C05C 5/00 - Fertilisers containing other nitrates
• C05C 5/04 - Fertilisers containing other nitrates containing calcium nitrate

Abstract

Disclosed is a method for the homogeneous precipitation separation of nickel, cobalt and manganese from a laterite nickel ore acid leaching solution, wherein the present invention belongs to the technical field of the comprehensive utilization of complex multi-metal resources. The method comprises: formulating a sodium hydroxide solution or finely ground calcium oxide or magnesium oxide into a slurry as a precipitating agent; conveying the precipitating agent to a homogeneous reactor via a pipe provided with a rate control device and installing a refiner at an outlet end to refine the precipitating agent; conveying an acid solution containing nickel, cobalt and manganese to the homogeneous reactor via a pipe provided with a rate control device and installing an atomizer at an outlet end to atomize the acid solution, wherein the controlled rate atomized nickel-cobalt-manganic acid solution and the rate-control refined precipitating agent are homogeneously reacted in the homogeneous reactor to obtain a post-reaction slurry; and filtering the post-reaction slurry to obtain a liquid remaining after nickel-cobalt precipitation and a sand-like nickel-cobalt-manganese residue. The method has a simple process, a high operability, a low cost and convenient industrial production, can realize high-efficiency separation of nickel, cobalt and manganese from a laterite nickel ore acid leaching liquid, and has broad application prospects.

IPC Classes  ?

• C22B 23/00 - Obtaining nickel or cobalt
• C22B 47/00 - Obtaining manganese

Abstract

A method for preparing a ternary cathode material from a laterite nickel ore nitric acid leaching solution, comprising: adjusting pH of a laterite nickel ore nitric acid leaching solution to obtain an iron and aluminum slag and a filtrate, adding fluoride salt to the filtrate to deeply remove calcium and magnesium to obtain a calcium-magnesium slag and a nickel, cobalt, and manganese-rich solution, adjusting pH of the nickel, cobalt, and manganese-rich solution again, precipitating nickel, cobalt, and manganese to obtain one nickel, cobalt, and manganese slag and a nickel, cobalt, and manganese-poor solution, adjusting the pH of the nickel, cobalt, and manganese-poor solution, deeply precipitating nickel, cobalt, and manganese, returning the obtained second nickel, cobalt, and manganese slag for adjusting the pH of the laterite nickel ore nitric acid leaching solution, and preparing a precursor of the ternary cathode material from the one nickel, cobalt, and manganese slag; adding the precursor, a lithium source, an additive agent, and water to a high pressure reactor by the amount, performing a hydrothermal reaction, directly drying, grinding, and high temperature calcination to obtain the nickel, cobalt, manganese, and lithium ternary cathode material. The method improves the comprehensive use of associated resources in a laterite nickel ore, is wide in source of raw material, has a simple processing procedure, is low in cost and the like. The ternary cathode material prepared by the method has a uniform granularity, good stability, high specific capacity, and high activity.

IPC Classes  ?

• C01G 53/00 - Compounds of nickel
• 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 electrodes; Lithium-ion batteries

Abstract

Disclosed are a method for efficiently recycling iron, scandium, and aluminum from limonite type lateritic nickel ores, comprising: crushing or finely grinding the limonite type laterite nickel ores to obtain ore powder; selectively leaching the ore powder by using nitric acid to obtain sulfur-free iron ore concentrates of which the iron content exceeds 60%; performing controllable sedimentation/separation operations on a leach solution by adding magnesium oxide, or calcium oxide, or calcium carbonate, so that an aluminum-scandium mixture is obtained; after roasting dehydration of the aluminum-scandium mixture, adding the approximate amount of cryolite and performing molten salt electrolysis to directly prepare an aluminum-scandium alloy; and performing controllable sedimentation/separation on the subsequent solution, and preparing nickel-cobalt hydroxide products by neutralizing or performing extraction-electrodeposition to prepare nickel-cobalt products. According to the present invention, under mild conditions without external pressurization, efficient iron, scandium, and aluminum recovery and utilization can be achieved while selective nickel and cobalt leaching is ensured, both the nickel and cobalt leaching rates can reach above 90%, the iron and scandium recovery rates can reach above 95%,and the aluminum recovery rate can reach 65%. Therefore, the present invention well achieves efficient recovery and utilization of iron, scandium, aluminum, nickel, and cobalt in the limonite type lateritic nickel ores.

IPC Classes  ?

• C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
• C22B 21/00 - Obtaining aluminium
• C22B 59/00 - Obtaining rare earth metals
• C25C 3/36 - Alloys obtained by cathodic reduction of all their ions
• C25C 1/24 - Alloys obtained by cathodic reduction of all their ions
• C22B 23/00 - Obtaining nickel or cobalt

Abstract

Disclosed is a method for the homogeneous precipitation separation of iron and aluminum from a laterite nickel ore acid leaching solution, wherein the present invention belongs to the technical field of nonferrous metal wet metallurgy. The present invention comprises: finely grinding calcium carbonate or magnesium carbonate and mixing same with water in a certain ratio, and uniformly stirring same to prepare a calcium carbonate milk or a magnesium carbonate milk as a precipitating agent; transferring the precipitating agent to a homogeneous reactor via a pipe provided with a rate control device and installing a refiner at an outlet end for refining the precipitating agent; conveying a laterite nickel ore acid leaching solution to the homogeneous reactor via a pipe provided with a rate control device, and installing an atomizer at an outlet end for atomizing the acid leaching solution, wherein the controlled-rate atomized laterite nickel ore acid leaching solution and the controlled-rate refined precipitating agent are homogeneously reacted in the homogeneous reactor to obtain a post-reaction slurry; and filtering the reaction slurry to obtain a liquid remaining after iron aluminum removal and a sand-like iron-aluminum residue. The method has a simple process, a high reliability and easy industrialization, can effectively realize the separation of iron and aluminum from the red earth nickel ore acid leaching solution, and has broad application prospects.

IPC Classes  ?

• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 23/00 - Obtaining nickel or cobalt