Abstract

A method for reducing consumption of fresh steam in aluminum oxide production, belonging to the technical field of aluminum oxide production. The method comprises the following steps: a low-temperature mother liquor (1) undergoing heat exchange with a concentrated liquor for temperature rising, and then conveying same to an alkali liquor blending (4) step; separately conveying a blended circulating mother liquor (5) to raw ore pulp grinding (7) and pre-desiliconization (9) steps, the blended circulating mother liquor after undergoing raw ore pulp grinding (7) being also then fed to the pre-desiliconization step (9); mixing the pre-desiliconized ore pulp and the circulating mother liquor (5) and then feeding same to a dissolution (10) step; and in the dissolution (10) step, heating same with dissolution exhaust steam, fresh steam condensate water and fresh steam in sequence to reach a dissolution temperature, subjecting the digested pulp to flash evaporation for pressure reduction and cooling and dilution and then conveying same to a downstream step, the fresh steam condensate water undergoing flash evaporation for cooling and then being fed back to a thermal power plant, and the flash steam being combined into a low-pressure steam pipe network. The method can reduce the comprehensive steam consumption of aluminum oxide production, simplify the production process, and reduce the use amount of circulating water in aluminum oxide production.

IPC Classes  ?

• C01F 7/0606 - Making-up the alkali hydroxide solution from recycled spent liquor
• C01F 7/062 - Digestion

Abstract

The present invention belongs to the technical field of hydrometallurgy. Disclosed is a volute-type feeding device for a settling tank, the device comprising a feeding well (2). The main body of the feeding well (2) is in the shape of a horizontal volute, the volute being composed of a multi-section diameter-variable arc-shaped housing and an upper portion and a bottom portion thereof being opened; and an inner wall of the feeding well (2) is fixedly connected to one side of a flow deflector plate (4) for flow guide, several blades (6) are arranged in an area enclosed by the other side of the flow deflector plate (4) and are configured to enhance mixing of a flocculant with slurry, and the slurry flows along the several blades (6) and flows out via gaps therebetween. By means of the arrangement of the volute-shaped feeding well (2), which cooperates with the blades (6) and the flow deflector plate (4) that form angles and further cooperates with a dispersion cone (7) at the bottom thereof, the flocculant and the slurry are fully mixed, and a residence time of the slurry in the feeding well (2) is increased, such that the flocculated slurry is uniformly dispersed into the settling tank, and a processing capacity per unit area of the settling tank is thus improved.

IPC Classes  ?

• B01D 21/24 - Feed or discharge mechanisms for settling tanks
• B01D 21/01 - Separation of suspended solid particles from liquids by sedimentation using flocculating agents

Abstract

A large graphitization furnace and a joint production method. The large graphitization furnace comprises a furnace body (1), wherein several material boxes (5) aligned end to end are arranged in the furnace body (1) side by side in a width direction; two ends of each material box (5) in a length direction are each provided with an electrode wall (7); one station is formed by one material box (5) and the corresponding electrode walls (7) at the two ends of the material box (5); the electrode walls (7) are conductors; an insulating carbon brick (9) is arranged between adjacent electrode walls (7); a pre-graphitization material box (6) is arranged between adjacent material boxes (5); each material box (5) is filled with a resistive material and a raw material to be graphitized; a raw material to be heated at a low temperature is arranged in each pre-graphitization material box (6); and the remaining positions inside the furnace body (1) are filled with a thermal insulation material (4). By dividing the whole furnace body (1) into several stations, the heat storage and heat dissipation losses of the furnace body (1) are reduced, a large-scale graphitization furnace is realized, and in comparison with a graphitization furnace with the same productivity, the area occupied for construction and the one-time investment cost are saved on. By arranging a pre-graphitization material box (6) between adjacent material boxes (5), the graphitization waste heat in the material boxes (5) is recycled. By means of a production method of sequentially applying electricity from the center to two sides, the waste heat during a graphitization process is fully utilized, thereby shortening the graphitization time, and improving the production efficiency.

IPC Classes  ?

• C01B 32/205 - Preparation

Abstract

Disclosed is an automatic repair production line for an anode rod, comprising a rotary workbench, a cutting machine, a turnover positioning machine, a ground rail, a disassembling apparatus, a chamfering apparatus, a welding robot, and a welding apparatus; the turnover positioning machine is slidingly connected to an upper surface of the ground rail, and the disassembling apparatus crosses and is secured to a position above an end portion of the right side of the ground rail; the rotary workbench is secured to an end portion of the left side of the ground rail; the chamfering apparatus is secured in front of the rotary workbench; the welding apparatus is secured to the left side of the rotary workbench; and the welding robot is secured between the chamfering apparatus and the welding apparatus. The present invention can effectively prevent the disadvantages of uneven cutting surface, poor welding accuracy, the rod and a steel yoke beam not being perpendicular, pseudo soldering, proneness to falling off or cracking, short service life, etc. caused by welding process limitations and manual operation, improving welding quality. In addition, by means of automatic cutting and welding, rod transfer time is shortened, and production efficiency can be greatly improved.

IPC Classes  ?

• B23P 23/00 - Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
• B23Q 7/00 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting

Abstract

The present invention relates to the technical fields of aluminum electrolysis and carbon, and provides an unmanned stacking system for an aluminum anode carbon block warehouse. The system comprises an intelligent stacking crane device, an intelligent ground conveyor line device, an automatic unloading guidance system, the Internet of Things, a crane dispatching and warehouse management system, and an operation and maintenance terminal. The intelligent stacking crane device is electrically connected to the intelligent ground conveyor line device, the automatic unloading guidance system, the Internet of Things, the crane dispatching and warehouse management system, and the operation and maintenance terminal. By means of the unmanned stacking system for an aluminum anode carbon block warehouse, warehouse operation procedures and service processes are integrated and divided, unmanned driving and intelligent dispatching of stacking cranes are achieved, inventory management of carbon blocks is improved, and intelligent warehouse management of a carbon block transfer station is implemented, so that the requirements of unmanned and intelligent development of enterprise production are met, the enterprise production costs are reduced, and the production efficiency is improved.

IPC Classes  ?

• B65G 57/32 - Stacking of articles characterised by stacking during transit

Abstract

The present invention relates to the technical field of molten salt lithium electrolysis, and disclosed is a multi-anode electrolytic cell. The present invention comprises a sealed container; at least two electrode sets are evenly arranged in the sealed container; each electrode set is composed of an anode and a cathode; the top end of the anode penetrates through the top end of the sealed container and protrudes out of the sealed container; a separation net is provided on the outer side of the bottom of the anode; the cathode is provided on the outer side of the separation net; the cathode is connected to a conductive plate; the top end of the conductive plate protrudes out of the top end of the sealed container; a collection hood with a bottom cutout is provided above the cathode; and the collection hood surrounds the anode and is used for collecting metal generated by ionization of the cathode. According to the present invention, the electrode sets are evenly arranged, such that the physical field distribution in the sealed container is uniform, and a continuous and stable electrolysis process is ensured.

IPC Classes  ?

• C25C 7/02 - ElectrodesConnections thereof
• C25C 7/00 - Constructional parts, or assemblies thereof, of cellsServicing or operating of cells
• C25C 3/02 - Electrolytic production, recovery or refining of metals by electrolysis of melts of alkali or alkaline earth metals

Abstract

A high-purity graphitization furnace with ventilation, the furnace comprising a furnace end wall (1), side walls (2), a bottom plate (4) and a furnace core (9), wherein the furnace end wall (1), the side walls (2) and the bottom plate (4) enclose a basic structure of a furnace body, and the furnace core (9) is located in the furnace body; side columns (3) are disposed on an outer side of each side wall (2); a ground beam (5) is provided below the bottom plate (4); a gas distribution device (6) is provided outside the side wall (2), a gas intake pipe (7) is connected to the gas distribution device (6), and the gas intake pipe (7) extends into a lower area inside the furnace body from the side wall (2); and a furnace cover is provided above the furnace body. The furnace is simple to manufacture, and has low implementation cost, high purification efficiency, stable performance in use, a long service life, guaranteed product quality and productivity, and low operation and maintenance cost.

IPC Classes  ?

• C01B 32/205 - Preparation

Abstract

3.

IPC Classes  ?

• C10B 47/04 - Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge in shaft furnaces
• C10B 57/00 - Other carbonising or coking processesFeatures of destructive distillation processes in general
• C10L 9/08 - Treating solid fuels to improve their combustion by heat treatment, e.g. calcining
• C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,

Abstract

A pot furnace for calcining petroleum coke at low temperature may include a pot, and a cooling water jacket and a flame path below the pot. The flame path may include eight layers. An inlet of a first flame path layer may be in communication with a volatile channel in the front wall, and is provided with a first flame path layer flashboard An eighth flame path layer may be in communication with a communication flue. Flue gas may be discharged out of the furnace body through a main flue. A furnace bottom cooling channel may be provided below the eighth flame path layer.

IPC Classes  ?

• F27B 14/08 - Details specially adapted for crucible, pot or tank furnaces
• C10B 57/00 - Other carbonising or coking processesFeatures of destructive distillation processes in general
• F27B 14/04 - Crucible or pot furnacesTank furnaces adapted for treating the charge in vacuum or special atmosphere
• F27B 14/14 - Arrangements of heating devices
• F27D 7/06 - Forming or maintaining special atmospheres or vacuum within heating chambers
• F27D 9/00 - Cooling of furnaces or of charges therein
• B01J 6/00 - CalciningFusing
• C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,

Abstract

Provided is a low-temperature calcination process for petroleum coke. The process comprises: controlling the flame path temperature and discharge rate of a pot furnace, so that the calcination temperature of petroleum coke in a material pot is 1150-1220°C, the discharge rate is 10-20% higher than the normal discharge rate and reaches 110-120 kg/h, and the desulfurization amount of the petroleum coke during the calcination is reduced so that the true density of calcined coke is 2.05-2.07 g/cm3. The phenomenon of overcalcination generated in producing calcined coke for a prebaked anode by using the pot furnace is avoided, the desulfurization amount of the petroleum coke during the calcination is reduced, the content of sulfur dioxide in flue gas is reduced, corrosion to silica bricks by sulfur in the petroleum coke is slowed down, the service life of the furnace body is prolonged, and the production capacity of the pot furnace is improved.

IPC Classes  ?

• C01B 31/02 - Preparation of carbon; Purification

Abstract

Provided is a pot furnace for low-temperature calcination of petroleum coke. The pot furnace comprises a material pot (10), cooling water jackets (2) and flame paths (1), wherein the cooling water jackets (2) and the flame paths (1) are arranged below the material pot (10). There are eight layers of flame paths (1); an entrance of a first-layer flame path (5) is communicated with a volatile matter channel (3) on the front wall; a first-layer flame path gate (4) is arranged at the entrance of the first-layer flame path (5); an eighth-layer flame path (6) is communicated with a linkage flue (9); discharge out of the furnace body is performed through a total flue (8); a furnace bottom cooling channel (7) is arranged below the eighth-layer flame path (6). The phenomenon of overcalcination generated in producing calcined coke for a prebaked anode by using the pot furnace is avoided, the desulfuration amount of the petroleum coke during the calcination is reduced, the content of sulfur dioxide in flue gas is reduced, corrosion to silica bricks by sulfur in the petroleum coke is slowed down, and the service life of the pot furnace is prolonged.

IPC Classes  ?

• C01B 31/02 - Preparation of carbon; Purification
• F27B 14/00 - Crucible or pot furnacesTank furnaces

Abstract

The present invention relates to a control system, and in particular to an aluminum electrolysis plant control system. The system comprises an information integration platform, a production management system, and a plant optimization controller. The information integration platform is in charge of integrating data from each workshop and providing process control information to the production management system and the plant optimization controller. The production management system receives and processes data of the information integration platform, and provides production management information to the plant optimization controller. The plant optimization controller receives, optimizes, and diagnoses the production management information provided by the production management system and provides optimized and diagnosed signals to the information integration platform and each workshop control system. The present invention has the following advantages and effects: the present invention is capable of improving the enterprise management efficiency, optimizing the management process, and ultimately realizing the overall informatization goals of optimizing the management of enterprise internal resources, enhancing the production management and command, reducing the production cost, improving the product quality, and improving the overall management efficiency.

IPC Classes  ?

• G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]

Abstract

A large downstream tank type incinerator; a volatile material concentration channel (2) is arranged above a material tank (1); a front wall is provided with a front wall volatile material vertical channel (3) therein; a back wall is provided with a back wall volatile material vertical channel (4) therein; the front wall volatile material vertical channel (3) communicates with the volatile material concentration channel (2) and a first layer flame path (5); a pulling plate is arranged at the inlet of a bottommost layer flame path (5); the back wall volatile material vertical channel (4) communicates with the volatile material concentration channel (2), a second layer flame path (5) and a fourth layer flame path (5); a volatile material pulling plate is arranged at the inlets of the second layer flame path (5) and the fourth layer flame path (5); the bottommost layer flame path (5) is provided with preheated air channels (8) therebelow; one preheated air channel is connected to the first layer flame path (5), and an adjacent preheated air channel is connected to the fourth layer flame path (5); the bottommost layer flame path (5) communicates with a flue (13); the material tank (1) is provided with a cooling water jacket (21) therebelow; the flame paths (5) are a total of eight layers, and each layer flame path (5) communicates with the next in a circuitous manner; and the height of each flame path (5) is 680 mm. Therefore, the size of the material tank is increased while reasonably increasing the height of the flame path, increasing the sectional area of the flame path, and greatly ensuring product quality.

IPC Classes  ?

• C01B 31/02 - Preparation of carbon; Purification

Abstract

An anode rod and crossbeam steel claw structure, and more particularly, a multi-metal-material anode rod and crossbeam steel claw structure with the advantages of low voltage drop, high intensity, long service life and easy maintenance. An anode rod of the anode rod and crossbeam steel claw structure is connected to a crossbeam, and a steel claw thereof is connected to the crossbeam through a soldering lug. Using the structure mentioned above changes the material of the crossbeam, and effectively reduces the voltage drop of this section. By changing the strength of the crossbeam, the deformation of the steel claw and the thermal expansion stress of a ferrophosphorus ring are absorbed, the stress state of an anode carbon block is improved, and the conductive area is increased. Therefore, the voltage drop can be reduced.

IPC Classes  ?

• C25C 3/12 - Anodes

Abstract

Disclosed is a lateral composite block for a liner in a heat-insulating aluminum electrolysis cell, the composite block comprising a lateral block combining silicon nitride and silicon carbide, a cell housing and a profile carbon block, wherein the side of the lateral block combining silicon nitride and silicon carbide in contact with the cell housing is grooved, a heat-insulating layer being mounted inside the groove, and a material resistant to corrosion from the electrolyte vapour sealing between the heat-insulating layer in the groove and the cell housing. The lateral composite block for the liner alters the mounting form of the heat-insulating layer of the melt region in the liner structure of a traditional heat-insulating electrolysis cell, wherein the heat-insulating layer is inserted into the groove of the lateral block combining silicon nitride and silicon carbide, the seal of the material resistant to corrosion from the electrolyte vapour is sintered together with the lateral block combining silicon nitride and silicon carbide as one piece, facilitating long-term maintenance of the performance of the heat insulation material, maintaining the heat balance ability of the electrolysis cell, and extending the service life of the electrolysis cell.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

Provided is a counterflow calcine furnace, which comprises a material tank (1), a fire channel (5) disposed at two sides of the material tank (1), a front wall, and a rear wall. A volatile component gathering channel (2) is disposed above the material tank, a front wall volatile component vertical channel (3) is disposed inside the front wall, a rear wall volatile component vertical channel (4) is disposed inside the rear wall, the front wall volatile component vertical channel communicates with the volatile component gathering channel (2) and a bottom layer fire channel, a volatile component pulling plate (6) is disposed at the entrance of the bottom layer fire channel, the rear wall volatile component vertical channel communicates with the volatile component gathering channel and the second lowest layer fire channel and the middle portion fire channel, a volatile component pulling plate (6) is disposed at the entrances of the second lowest layer fire channel and the middle portion fire channel, a preheating air channel is disposed below the bottom layer fire channel, a preheating air pulling plate (7) is disposed at the entrance of the preheating air channel, the preheating air channel communicates with the rear wall of the bottom layer fire channel, the first layer fire channel communicates with a flue (8), a cooling water sleeve (10) is disposed below the material tank. The calcine furnace is capable of increasing the maximum calcining temperature, so as to improve the quality of products.

IPC Classes  ?

• F27B 14/00 - Crucible or pot furnacesTank furnaces
• F27B 14/14 - Arrangements of heating devices
• C01B 31/02 - Preparation of carbon; Purification

Abstract

Disclosed is a method for producing aluminium oxide using industrial solid wastes, and especially relates to a method for preparing aluminium oxide using fly ash. The method comprises the following steps: milling the raw materials, clinker sintering, clinker dissolution, recovery by ammonia gas, separation and scrubbing of high silicon slag, decomposition of the aluminium sulfate solution, separation and scrubbing of the aluminium hydroxide, calcination of the aluminium hydroxide, circulation and evaporation of the ammonium sulfate solution and so on, the product being aluminium oxide. The present invention requires no accessory ingredients and can effectively extract aluminium oxide from fly ash, the extraction rate thereof exceeding 85%.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C01F 7/30 - Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds

Abstract

Disclosed is a cathode structure for reducing horizontal current in molten aluminum, the structure comprising a cathode carbon block; the cathode carbon block is provided with a cathode steel bar thereunder; the cathode steel bar is provided with a separation gap in the longitudinal direction; the separation gap is provided with separation gap insulation materials therein; the bottom of the separation gap in the cathode steel bar together with the end and bottom of the cathode carbon block enclose an insulated rectangular area; the upper part of the cathode steel bar is connected to the cathode carbon block via an electric conductor. The structure homogenizes the current distribution of the molten aluminum in an aluminum electrolytic tank without changing the cathode discharge mode, namely side discharge, reduces the horizontal current in the molten aluminum, improves electrolytic tank stability, and enables the electrolytic tank to operate efficiently under a low polar distance, thus effectively reducing the energy consumption per ton of aluminum, saving energy while extending the service life of the cathode.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

The present invention relates to a method for producing aluminium oxide using industrial solid wastes, and especially relates to a method for producing aluminium oxide by processing fly ash with an ammonia process. The method comprises the following steps: milling raw materials, calcining same to obtain a wrought material, dissolution of the wrought material, recovery by ammonia gas, separation and scrubbing of high silicon slag, decomposition of the aluminium ammonium sulfate solution, separation and scrubbing of the crude aluminium oxide, evaporation of the ammonium sulfate solution and Bayer process treatment. The products are aluminium oxide of metallurgical grade, high silicon slag and high iron slag, wherein the high silicon slag can be used as the raw material for producing carbon white, silica gel and high silicon products, and the high iron slag can be used as the raw material for iron-making. The present invention does not need any aid, can effectively extract aluminium oxide from fly ash, and the extraction rate of aluminium oxide can reach more than 90%, thereby achieving comprehensive utilization of fly ash.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C01F 7/30 - Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless

Abstract

Disclosed is a bottom aspiration purification system, formed by the following structure: a dust remover, the bottom of which is communicated with a front collection pipe of the dust remover through an air-intake pipe of the dust remover; a reactor, which is arranged at the air-intake pipe of the dust remover; an alumina distributing device, which is arranged between the reactor and a fresh alumina storage cabin and communicated with the reactor through a distributing chute; an alumina feeding device, which is arranged between the alumina distributing device and the fresh alumina storage cabin; a return feeding tube, which is arranged at the lower part of the dust remover. The alumina in the return feeding tube is transferred to a material lifting device through a return chute and then transferred to a fluorinated alumina cabin. The upper part of the dust remover is communicated with an export collection pipe of the dust remover through an export pipe of the dust remover. The export collection pipe of the dust remover is communicated with a chimney through a fan. The system can improve the efficiency and maintenance convenience, reduce the energy consumption of the system and increase the stability of the system.

IPC Classes  ?

• C25C 3/22 - Collecting emitted gases
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols

Abstract

Disclosed is a single-point control based feeding method for a pre-baked anode aluminum reduction cell feeder. A feeding port is divided into different regions. Equidistant voltage drop signals are sampled on anode leaders in different regions. The anode current is calculated according to the equidistant voltage drop signal. The aluminum oxide concentration in regions of the feeding port is compared according to the variation trend of the anode current. Feeding control is performed distinguishingly for states of the regions of the feeding port. Through the method, targeted controlling can be performed on the aluminum oxide concentration in each region of the electrolytic cell, thereby improving the accuracy of the feeding control, avoiding precipitation production or effect frequency, being beneficial to stable running of the electrolytic cell, and achieving the effect of saving energy, reducing consumption and improving current efficiency.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

Disclosed is a single-point control based feeding method for a pre-baked anode aluminum reduction cell feeder. A feeding port is divided into different regions. Equidistant voltage drop signals are sampled on anode leaders in different regions. The anode current is calculated according to the equidistant voltage drop signal. The aluminum oxide concentration in regions of the feeding port is compared according to the variation trend of the anode current. Feeding control is performed distinguishingly for states of the regions of the feeding port. Through the method, targeted controlling can be performed on the aluminum oxide concentration in each region of the electrolytic cell, thereby improving the accuracy of the feeding control, avoiding precipitation production or effect frequency, being beneficial to stable running of the electrolytic cell, and achieving the effect of saving energy, reducing consumption and improving current efficiency.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

A device using the live welding method for aluminum electrolytic cell overhauling under series full current consists of short-circuit buses at the bottom of the cell (1), pillar buses (2), an anode bus (3), a balance bus (4), a inter-cell standby bus (5), a door-shaped pillar clamp (6), an arcuate clamp (7) of anode buses, a current conversion switch (8, a mechanical switching device (9) for the short-circuit port, a voltage sensor and wires thereof (10), a temperature sensor and wires thereof (11), a system (12) for data acquiring, displaying, analyzing and alarming, an A-side welding area (13), a B-side welding area (14) and compression-joint points (15) on pillar soft belts of overhauling cells; and the live welding method comprises the following steps: when welding is required to be performed in some zone, the currents of short-circuit buses at the bottom of the cell (1) and pillar buses (2) which influence the welding area most are cut off, the serial currents are shunted to other pillar buses (2), other buses at the bottom of the cell (1) and the inter-cell standby buses (5) such that the magnetic field intensity at the welding area can be lowered to the extent that welding can be performed so as to perform welding, and such a device and method can achieve live welding of aluminum electrolytic cells overhauling under series full current.

IPC Classes  ?

• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• B23K 31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups
• C25D 9/04 - Electrolytic coating other than with metals with inorganic materials
• C25D 21/12 - Process control or regulation
• C25C 3/16 - Electric current supply devices, e.g. bus bars

Abstract

The present invention relates to a device for on-line measuring anode current distribution of an aluminum electrolytic cell. The device comprises the following structures: an insulating connector body which inside is provided with a measuring contact and which outside is fixed on a fastening means. The measuring contact is a metal conductor, one end of the measuring contact is threaded, and the measuring contact is fixed with the insulating connector body via the threaded end. Advantages of the present invention are as follows: the present invention is advantages in a simple structure, safe operations, a long service life, easy installation and removal, lower manpower costs, a reduced cell effect coefficient, and reduced energy consumption of the aluminum factory. Since the adjusting nut for fastening and adjusting looseness is installed at the opening of the concave-shaped steel strip, in a completely open state the fastening means is completely open on one side so that the means can be smoothly and quickly installed on the guide rod; a gap can be adjusted in the locked state so as to ensure close contact between the measuring contact and the anode guide rod.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

A method for suppressing and extinguishing an anode effect of a pre-baked anode electrolyzer and an equipment for implementing the method are provided. The method includes the following steps: determining the anode to be occurring an anode effect; feeding through the feed opening corresponding to the anode to be occurring the anode effect of the electrolyzer; if the anode effect occurs, only raising and pressing the local bus according to the anode position where the anode effect occurs to extinguish the anode effect. By merely supplying alumina locally, it can effectively inhibit the generation of the anode effect, as well as by raising and pressing of the local bus, it can extinguish the anode effect. By feeding locally through a single feeding point into the anode which appears a feature of anode effect to inhibit the generation of the anode effect, it can avoid destroying the state of the electrolyzer when feeding through all of the feed openings at the same time, and is beneficial to the stability of electrolyzer operation. At the same time, by raising and pressing of the local bus to extinguish the anode effect, it can achieve the effects of energy saving and consumption reduction.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

Disclosed is a method for uniforming the distribution of current in an aluminum electrolysis cell. At least one cathode steel bar is fixedly tied or casted at the lower part of a cathode carbon block,and the cathode steel bar is cutted into several sections located at different places along the length direction by a separating seam.The said sections upon the separating seams of the cathode steel bar except those between the separating seams are totally connected with the cathode carbon block by conductive bodies,and the sections between and below the separating seams of the cathode carbon steel bar are insulated from the cathode carbon block by insulators. Insulating materials for separating seam are filled in the separating seam, so that the sections upon and below the separating seams of the cathode steel bar are insulated from each other,and one end of the cathode steel bar penetrates out of the electrolytic cell from its sidepiece. The cathode current of the aluminum electrolysis cell is distributed more uniformly, and the horizontal current in the aluminum liquid is reduced, then the stability of the electrolytic cell is improved, and the aluminum electrolysis cell can be efficiently circulated with a low polar distance, thus the energy consumption for per ton of aluminum is reduced effectively, and the energy-saving effect is achieved, meanwhile the service life of the cathode is also prolonged.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

Disclosed is a method for uniforming the distribution of current in an aluminum electrolysis cell. At least one cathode steel bar is fixedly tied or casted at the lower part of a cathode carbon block,and the cathode steel bar is cutted into several sections located at different places along the length direction by a separating seam.The said sections upon the separating seams of the cathode steel bar except those between the separating seams are totally connected with the cathode carbon block by conductive bodies,and the sections between and below the separating seams of the cathode carbon steel bar are insulated from the cathode carbon block by insulators. Insulating materials for separating seam are filled in the separating seam, so that the sections upon and below the separating seams of the cathode steel bar are insulated from each other,and one end of the cathode steel bar penetrates out of the electrolytic cell from its sidepiece. The cathode current of the aluminum electrolysis cell is distributed more uniformly, and the horizontal current in the aluminum liquid is reduced, then the stability of the electrolytic cell is improved, and the aluminum electrolysis cell can be efficiently circulated with a low polar distance, thus the energy consumption for per ton of aluminum is reduced effectively, and the energy-saving effect is achieved, meanwhile the service life of the cathode is also prolonged.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A method using anode rod equidistant voltage drop to predict anode effect comprises the following steps: an anode rod equidistant voltage drop sensor is mounted on each anode rod of a prebaked anode electrolytic cell, said anode rod equidistant voltage drop sensor transmitting the collected anode rod equidistant voltage drop signal to a front end data analyzer; the front end data analyzer analyzes and processes the anode rod equidistant voltage drop data, identifies anodes for which there is an impending anode effect, and transmits the prediction results to the electrolytic cell control machine. Malfunctioning anodes are effectively monitored by means of targeted prediction of the anode effect on each anode in the electrolytic cell, thereby allowing for precision operation of the electrolytic cell, which in turn promotes stable electrolytic cell operations, saves energy and improves current efficiency.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

A method using anode rod equidistant voltage drop to predict anode effect comprises the following steps: an anode rod equidistant voltage drop sensor is mounted on each anode rod of a prebaked anode electrolytic cell, said anode rod equidistant voltage drop sensor transmitting the collected anode rod equidistant voltage drop signal to a front end data analyzer; the front end data analyzer analyzes and processes the anode rod equidistant voltage drop data, identifies anodes for which there is an impending anode effect, and transmits the prediction results to the electrolytic cell control machine. Malfunctioning anodes are effectively monitored by means of targeted prediction of the anode effect on each anode in the electrolytic cell, thereby allowing for precision operation of the electrolytic cell, which in turn promotes stable electrolytic cell operations, saves energy and improves current efficiency.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

Disclosed is a device for measuring anode current distribution of an aluminum electrolytic cell on line. The device is formed by the following structure: an insulation connector. A measurement contact is disposed at an inner side of the insulation connector, and an outer side of the insulation connector is fixed on a fastening device. The measurement contact is a metal conductor. An end of the measurement contact is provided with a thread. The measurement contact is fixed to the insulation connector through the end with the thread. Since an adjustment nut capable of being fixed and with a tension adjustable is mounted at an opening of a concave steel tape, in a fully open state, one side of the fastening device is completely open, ensuring that the device can be successfully and rapidly mounted on a guide rod; while in a locking state, a gap can be adjusted, ensuring that the measurement contact is tightly in contact with an anode guide rod. The device is easy to mount and demount, thereby reducing the cell effect coefficient and implementing energy-saving and consumption-reducing of the aluminum manufacturer.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells

Abstract

A switching mechanism of a clamp includes clamping plates (1) and crank arm mechanisms (2). The upper ends of crank arm mechanisms (2) are connected with a common hanger beam (9). The upper part of the hanger beam (9) is equipped with a guide chute (10) where slidable insert plates (3) are arranged. Each insert plate (3) has a key-shape groove (4) composed of a long strip hole and a large round hole. The hanger beam (9) is provided with a hydraulic driving unit (6) which can drive the insert plates (3) moving. One support rod (5) is provided in the groove (4) of each insert plate (3) and a boss (7) is formed on the upper end of each support rod (5). The diameter of the boss (7) is greater than the width of the long strip hole and less than the diameter of the large round hole. The lower end of each support rod (5) is connected with a set of clamping plates (1) through a short connecting rod (11). The mechanism has a simple structure and a low manufacturing cost. The mechanism is not influenced by the height error of carbon blocks during the operation, thereby being easy to operate and difficult to damage.

IPC Classes  ?

• B25J 15/00 - Gripping heads
• B25J 19/00 - Accessories fitted to manipulators, e.g. for monitoring, for viewingSafety devices combined with or specially adapted for use in connection with manipulators
• B65G 57/00 - Stacking of articles
• B65G 61/00 - Use of pick-up or transfer devices or of manipulators for stacking or de-stacking articles not otherwise provided for

Abstract

A cathode structure of an aluminum electrolytic cell, wherein the section of the cathode steel bar adjacent to the end portion of the cathode carbon block in its lengthwise direction is divided from top to bottom by partition gap(s) into at least two portions including an upper portion in a height direction of the cathode steel bar, the section of the cathode steel bar which is in a middle portion of the cathode carbon block and not divided is connected to the cathode carbon block by totally using a conductor, the upper portion of the cathode steel bar adjacent to the end portion of the cathode carbon block is connected to the cathode carbon block by using the conductor, the other portions below the upper portion are insulated from the cathode carbon block by using an insulator, and the partition gap is filled with a partition gap insulating material. An aluminum electrolytic cell including the above-mentioned cathode structure and a process for reducing horizontal electric current in the liquid aluminum in the aluminum electrolytic cell are also disclosed. The present invention substantially reduces the horizontal electric current in the liquid aluminum, makes the cathode electric current more uniformly distributed, improves the stability of the electrolytic cell, prolongs the service lifetime of the electrolytic cell, effectively reduces energy consumption of producing aluminum per ton and exhibits a remarkable energy-saving effect.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

Disclosed is a cathode structure of an aluminum electrolysis cell, where a cathode steel bar is divided, along a height direction of the cathode steel bar from top to bottom, into at least two portions comprising an upper portion by a dividing seam in a segment close to an end portion of a cathode carbon block along the length direction, the cathode steel bar is connected to the cathode carbon block by an electric conductor in a segment in a middle part of the cathode carbon block which is not divided, the upper portion of the cathode steel bar that is close to the end portion of the cathode carbon block and is divided is connected to the cathode carbon block by an electric conductor, the other portions that are located below the upper portion is insulated from the cathode carbon block by using an insulator, and the dividing seam is filled with a dividing seam insulating material. Disclosed are also an aluminum electrolysis cell comprising the cathode structure and a method for lowering a horizontal current in an aluminum liquid. Through the present invention, the horizontal current in the aluminum liquid is greatly lowered, so that the distribution of cathode current becomes more even, the stability of the electrolysis cell is improved, the service life of the cell is prolonged, the energy consumption per ton of aluminum is effectively lowered, and a significant energy saving effect is achieved.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

The present invention discloses a cell bottom structure of a reduction cell which comprises a reduction cell (1) and a cathode bus (2), wherein the bottom of the reduction cell (1) is provided with column-shaped cathode carbon blocks (3) perpendicular to the bottom of the reduction cell (1), and a lower end of the column-shaped cathode carbon block (3) is connected to the cathode bus (2). By means of inserting the column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell and connecting the lower end of the column-shaped cathode carbon block with the cathode bus, such that electrical current that guided from anode carbon blocks is guided through the molten aluminum to the column-shaped cathode carbon blocks and is downwardly guided out, the present invention reduces horizontal electrical current in the molten aluminum, such that the cathode extending into the molten aluminum can effectively reduce fluctuations of the molten aluminum to obtain a stable surface of the molten aluminum, thereby reducing a polar distance between a cathode and an anode and lowering cell voltage so as to achieve the object of lowering electricity consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A cathode with a replaceable assembly for retarding flow in an aluminum electrolytic cell is disclosed, which comprises a cathode carbon block (1) arranged at the bottom of the aluminum electrolytic cell and a cathode assembly (2) for retarding flow arranged on the surface of the cathode carbon block. The cathode assembly (2) for retarding flow is made from a material with high temperature resistance, corrosion resistance and large density such as mullite, spinel or zircon. The cross section of the cathode assembly (2) for retarding flow is in the shape of semicircle, arc or streamline. The height of the cathode assembly for retarding flow is in a range of 50-150 mm, and the width is in a range of 100-300 mm. The cathode assembly (2) for retarding flow is in the form of long strip or block. The cathode assembly(2) for retarding flow is arranged in the longitudinal direction of the cathode in the electrolytic cell, and each group has one or more cathode assemblies(2) for retarding flow. The stability of the interface between the aluminum solution and the electrolyte is properly improved in the aluminum electrolytic cell, and then the polar distance is effectively reduced during normal production. A lower working voltage thus obtained in the electrolytic cell will in turn lead to an effect of saving and reducing energy consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A cathode with a protrusion structure for an aluminum electrolytic cell is disclosed. The cathode protrusion structure (2) is arranged on the top of the cathode carbon block (1) or across the gap (3) between two cathode carbon blocks (1). The distance between cathode protrusion structures is in a range of 400mm-900 mm. The length of the traversely extended cathode protrusion structure is 100-250 mm longer than that of cathode carbon block. Two ends of protrusion structures are directly embedded into the paste around the sidewall. The length of the embedded and butted cathode protrusion structure is in a range of 3000-3200 mm. Two ends of the embedded and butted cathode protrusion structure are fixed by binding carbon blocks (4) respectively, and the binding carbon blocks are embedded into the paste around the sidewall (5). The cross-section of the cathode protrusion structure is in the shape of rectangle or isosceles trapezoid. The cathode protrusion structure is applicable to all types of aluminum electrolytic cells. The strip cathode protrusion structure can be implanted into the upper surface of the cathode conveniently and quickly when the sidewall of the common aluminum electrolytic cell is rammed, thereby forming a "flow retardation effect", reducing the flow rate of the aluminum liquid layer, decreasing energy dissipation from the aluminum liquid layer, therefore improving the stability of production and reducing energy consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

The present invention discloses replaceable cathode choking devices of an aluminum reduction cell which comprises cathode carbon blocks (1) and cathode choking devices (2) placed at the bottom of the aluminum reduction cell. The cathode choking devices (2) are placed on surfaces of the cathode carbon blocks. The cathode choking devices (2) are made of mullite, spinel or zirconite which is high temperature resistant, corrosion resistant and of high specific gravity. The cathode choking devices (2) have a cross-section of semicircular, arc or streamline shape. The cathode choking devices have a height of 50-150mm and a width of 100-300mm. The cathode choking devices (2) are elongated block-shaped. The cathode choking devices (2) are placed in a direction along a long side of a cathode of the reduction cell, wherein one or more cathode choking devices (2) are placed as a group. The present invention can better improve the stability of molten aluminum-electrolyte interface within the aluminum reduction cell, decrease the polar distance effectively during normal production and achieve a lower operating voltage of the reduction cell, thereby realize the effect of energy saving and consumption reduction.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A cathode boss structure for an aluminum electrolytic cell is disclosed. The cathode boss (2) is arranged on the top surface of the cathode carbon block (1) or on the top of the gap (3) between two cathode carbon blocks (1). The distance between cathode bosses is 400mm-900 mm. The length of the throughout elongate cathode boss is 100-250 mm longer than that of cathode carbon block, and two ends thereof are directly embedded into the paste around lateral portion. The length of the embedded and butted cathode boss is in a range of 3000-3200 mm, two ends thereof are fixed by binding carbon blocks (4) respectively, and the binding carbon blocks are embedded into the paste (5) around lateral portion. The cross-section of the cathode boss structure is in the shape of rectangle or isosceles trapezoid. The cathode boss structure is applicable to all types of current electrolytic cells. The strip boss is implanted into the top surface of the cathode of the electrolytic cell conveniently and quickly when the lateral portion of the common electrolytic cell is rammed, thereby forming a "choking effect", reducing the flow rate of the aluminum liquid layer, decreasing energy dissipation from the aluminum liquid layer, therefore improving the production stability of the electrolytic cell and reducing energy consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A bottom structure of an electrolytic cell is disclosed which comprises an electrolytic cell (1) and a cathode busbar (2). Columnar cathode carbon blocks (3) arranged at the bottom of the electrolytic cell (1) are perpendicular to the bottom of the electrolytic cell (1), and lower ends of the columnar cathode carbon blocks (3) are connected with the cathode busbars (2). By perpendicularly inserting the columnar cathode carbon blocks into the bottom of the electrolytic cell and by connecting the lower ends of the columnar cathode carbon blocks (3) with the cathode busbars, the current led from the anode block is moved downwardly through the aluminum liquid and the columnar cathode carbon blocks, thereby reducing the horizontal current. The cathode extending into the aluminum liquid can efficiently reduce the fluctuation of the aluminum liquid, thereby obtaining a stable surface of the aluminum liquid, reducing the distance between the anode and the cathode. A lower cell voltage thus obtained will in turn lead to an effect of reducing energy consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

The present invention discloses a method of configuring energy saving high and low cathodes of an aluminum reduction cell, said method comprising disposing cathode carbon blocks and cathode steel rods (3) at the bottom of the aluminum reduction cell, the cathode carbon blocks being formed by staggering high cathode blocks (1) and low cathode blocks (2) with different thicknesses. Both sides of the portion of each of the high cathode blocks (1) higher than each of the low cathode blocks (2) must be machined into bevels or arc angles, so as to achieve a good choking effect. The present invention can better improve the stability of molten aluminum-electrolyte interface within the aluminum reduction cell, decrease the polar distance effectively during normal production, and achieve a lower operating voltage of the reduction cell, thereby saving energy and reducing energy consumption

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A method for allocating higher and lower cathodes of an aluminum electrolytic cell in an energy-saving way is disclosed, in which cathode carbon blocks and cathode steel bars (3) are arranged at the bottom of the aluminum electrolytic cell, and the cathode carbon blocks are formed by alternatively mounting higher cathode blocks (1) and lower cathode blocks (2) with different thickness. The parts of the higher cathode blocks (1) higher than the low cathode blocks (2) shall be chamfered or cambered on both sides, such that a good effect of fluid resistance can be obtained. The stability of the interface between the aluminum solution and the electrolyte is properly improved in the aluminum electrolytic cell, and then the polar distance is effectively reduced during normal production. A lower working voltage thus obtained in the electrolytic cell will in turn lead to an effect of saving and reducing energy consumption.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A device used for a live welding method for aluminum electrolytic cell overhauling under series full current comprises of short-circuit busbars at the bottom of the cell (1), vertical-post busbars (2), an anode busbar (3), a balance busbar (4), a standby busbar across the cell (5), a door-shaped clamp of vertical post (6), an arcuate fixture of anode busbar (7), a commutating switch (8), a mechanical switching apparatus for short-circuit port (9), a voltage sensor and wires thereof (10), a temperature sensor and wires thereof (11), a system for data acquiring, displaying, analyzing and alarming (12), a welding area at A side (13), a welding area at B side (14), and a vertical-post soft belt contact for overhauling cell (15). The live welding method includes the following steps: when an area is required to be welded, cutting off the short-circuit busbar at the bottom of the cell (1) and the vertical-post busbar (2) which affect the welding area most, guiding the series full current to the other vertical-post busbars (2), the other short-circuit busbars at the bottom of the cell (1), and the standby busbar across the cell (5) so as to reduce the magnetic field strength at the welding area to the extent that welding can be performed, and then performing welding. The device and method can realize live welding for aluminum electrolytic cell overhauling under series full current.

IPC Classes  ?

• B23K 23/00 - Alumino-thermic welding
• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• C25C 3/16 - Electric current supply devices, e.g. bus bars

Abstract

A device used for a live welding method for aluminum electrolytic cell overhauling under series full current comprises of short-circuit busbars at the bottom of the cell (1), vertical-post busbars (2), an anode busbar (3), a balance busbar (4), a standby busbar across the cell (5), a door-shaped clamp of vertical post (6), an arcuate fixture of anode busbar (7), a commutating switch (8), a mechanical switching apparatus for short-circuit port (9), a voltage sensor and wires thereof (10), a temperature sensor and wires thereof (11), a system for data acquiring, displaying, analyzing and alarming (12), a welding area at A side (13), a welding area at B side (14), and a vertical-post soft belt contact for overhauling cell (15). The live welding method includes the following steps: when an area is required to be welded, cutting off the short-circuit busbar at the bottom of the cell (1) and the vertical-post busbar (2) which affect the welding area most, guiding the series full current to the other vertical-post busbars (2), the other short-circuit busbars at the bottom of the cell (1), and the standby busbar across the cell (5) so as to reduce the magnetic field strength at the welding area to the extent that welding can be performed, and then performing welding. The device and method can realize live welding for aluminum electrolytic cell overhauling under series full current.

IPC Classes  ?

• B23K 23/00 - Alumino-thermic welding
• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• C25C 3/16 - Electric current supply devices, e.g. bus bars

Abstract

A device used for a live welding method for aluminum electrolytic cell overhauling under series full current comprises of short-circuit busbars at the bottom of the cell (1), vertical-post busbars (2), an anode busbar (3), a balance busbar (4), a standby busbar across the cell (5), a door-shaped clamp of vertical post (6), an arcuate fixture of anode busbar (7), a commutating switch (8), a mechanical switching apparatus for short-circuit port (9), a voltage sensor and wires thereof (10), a temperature sensor and wires thereof (11), a system for data acquiring, displaying, analyzing and alarming (12), a welding area at A side (13), a welding area at B side (14), and a vertical-post soft belt contact for overhauling cell (15). The live welding method includes the following steps: when an area is required to be welded, cutting off the short-circuit busbar at the bottom of the cell (1) and the vertical-post busbar (2) which affect the welding area most, guiding the series full current to the other vertical-post busbars (2), the other short-circuit busbars at the bottom of the cell (1), and the standby busbar across the cell (5) so as to reduce the magnetic field strength at the welding area to the extent that welding can be performed, and then performing welding. The device and method can realize live welding for aluminum electrolytic cell overhauling under series full current.

IPC Classes  ?

• B23K 23/00 - Alumino-thermic welding
• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• C25C 3/16 - Electric current supply devices, e.g. bus bars

Abstract

A tool trolley for an electrolysis multifunctional machine set includes a frame (1); a feed box (2) fixed on the frame; a tool rotation table (3) arranged in the lower part of the feed box and capable of rotating around it; an operating chamber (4) positioned below the center of tool rotation table; a crust breaking tool (5), an anode replacing tool (6), a grab bucket tool (7) for cleaning anode pit and a discharging tool (8) all of which are flexibly connected to the tool rotation table around the operating chamber; a swing driving mechanism (13) located between the feed box and the tool rotation table. Because of employing a configuration structure in which the tools are arranged radially around the operating chamber, the operating chamber can rotate 190 degrees in clockwise and counterclockwise directions or not rotate, and the operation platform therein can rotate 90 degrees in clockwise and counterclockwise directions. Therefore, it is convenient for an operator to operate, and the operator is provided with wider view. The tool trolley has simple structure, and is very convenient and quick to mount and maintain. The configuration structure of the tool trolley has broken with traditional mode, so the appearance of the product is very novel.

IPC Classes  ?

• B66C 17/06 - Overhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forgesOverhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports combined with auxiliary apparatus serving particular purposes
• C25C 3/14 - Devices for feeding or crust breaking

Abstract

A method for configuring the tool set of a multifunctional trolley system for electrolysis is disclosed, wherein, a bin for starting materials is fixed on the frame of the trolley system so that the bin is fixed in the center of the trolley system without rotation; a rotating turntable for suspending tools is arranged below the bin and a control cab is fixed below the turntable, thus the control cab has the coincident centerline with the turntable and can rotate with the turntable; four tools, i.e. a crust breaking tool, an anode replacement tool, an anode pit cleaning grab and a charging device are arranged around the control cab and are fixed on the turntable; a manipulating platform capable of rotating within ±90 degree is arranged inside the control cab such that the centerline of the platform is located at the rotary center of the turntable; a hydraulic station and an electric controlling cabinet for controlling the actions of the trolley system and each tool are all fixed on the turntable. An apparatus obtained by the above-said configuring method is also disclosed.

IPC Classes  ?

• C25C 3/20 - Automatic control or regulation of cells
• C25C 3/14 - Devices for feeding or crust breaking
• B66C 17/06 - Overhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forgesOverhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports combined with auxiliary apparatus serving particular purposes

Abstract

The present invention provides a device used in an aluminum electrolytic cell for producing primary aluminum by Hell-Heroult process. Specifically, a method for avoiding the horizontal current in the aluminum pad of an aluminum electrolytic cell is disclosed. In the present invention, a conductor is arranged at the bottom of a cathode carbon block or below it, and the conductor directly passes through the bottom of the shell. The present invention can avoid the horizontal current in the aluminum pad of an aluminum electrolytic cell, and make the current distribution on the surface of the cathode carbon block much even. It can improve the current efficiency, and greatly increase the stability of the cell, thus it can prolong the life-time of the cell. The present invention has higher practicability. By using the method of the present invention, the problems induced by the horizontal current in the aluminum pad can be solved, so it has very important guiding- significance on the development of larger aluminum electrolytic cell in the future.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• C25C 3/16 - Electric current supply devices, e.g. bus bars

Abstract

A method for preventing the cell bottom from up-wrapping and a structure used for the same, especially a method for preventing the cell bottom from up-wrapping during the baking start-up process of the aluminum electrolytic cell and a structure used for the same are provided. In the structure, a connection (14) is provided on the cell bottom, and its one end is connected to the cradle(1) on the bottom surface of the aluminum electrolytic cell and the other end is fixed on the support pier(13) of the cell. The present invention can prevent the cell bottom from up-wrapping during the baking start-up process, and it not only can prevent the cathode from cracking but also can operate conveniently. The structure of the present invention is simple and easy to be carried out, and it can be conveniently operated and has good results.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• C25C 3/10 - External supporting frames or structures

Abstract

A fluidizing distribution apparatus for distributing alumina powder in the fume-purifying system of the aluminium electrolytic process is disclosed. The fluidizing distribution apparatus includes a material chamber for accommodating and distributing material, multiple distributor boxes for respectively receiving the material from the material chamber and discharging them out, and a gas chamber for providing the fluidizing air for the material chamber to fluidize the material in this chamber. Wherein, the material chamber is arranged horizontally or nearly horizontal, and the material chamber is communicated with the distributor box through adistributor pipe and a distributor nozzle. By setting a small level of height difference between the material chamber and the distributor box and by fluidising the material in the material chamber, the upper surface of the material in the chamber tends to be horizontal, and the relatively identical condition for distributing can be obtained. Thus it can effectively distribute the powdery alumina to multiple spots with better results, and it can improve and ensure the fume-purifying efficiency in aluminium electrolysis. Furthermore, the apparatus has lower cost and simple structure, so it is easier to be carried out.

IPC Classes  ?

• C25C 3/14 - Devices for feeding or crust breaking
• B65G 53/22 - Gas pressure systems operating with fluidisation of the materials through a porous wall the systems comprising a reservoir, e.g. a bunker
• B65G 53/20 - Gas pressure systems operating with fluidisation of the materials through a porous wall of an air slide, e.g. a trough

Abstract

An arrangement structure of discharge fans and a chimney, especially an arrangement structure of discharge fans and a chimney for a large-scale dust collecting system, preferably for an aluminium electrolysis smoke purifying system, is disclosed. Multiple fans (1,5,7,9) are evenly distributed around a chimney (8), the position difference between the fans each other. Cross-shaped partitions (4) and guide flues (3) are disposed in the chimney (8), in order to reduce the resistance at the outlet of the fans, and avoid the interference of the fans each other.

IPC Classes  ?

• F23J 11/00 - Devices for conducting smoke or fumes, e.g. flues
• F23J 13/00 - Fittings for chimneys or flues
• F23L 17/00 - Inducing draughtTops for chimneys or ventilating shaftsTerminals for flues

Abstract

A method and an apparatus for directly heating slurry are provided, especially, a method and an apparatus for directly heating bauxite slurry during digesting process in production of alumina are provided. Direct heating digester, steam buffer, temperature detector etc are used in the apparatus. The advantages are that the apparatus is simple, the steam is fully utilized, the heating efficiency is high, the investment of apparatus is reduced, bauxite slurry is digested at optimum temperature at all the time, the whole process is continuous, automatic, safe, and stable. The investment and energy consumption are reduced, and the economic benefit, labour productivity, and automation level are improved.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates

Abstract

A cooling system, especially a controlled cooling system for aluminium electrolytic cell is disclosed. The controlled cooling system of the present invention for aluminium electrolytic cell is carried into execution by the following technical means: a lateral exhausting tube is provided in the compartment located at the side of the electrolytic cell, the lateral exhausting tube supplies to the arterial vent-pipe, the arterial vent-pipe supplies to the main vent-pipe, and the main vent-pipe is connected to the exhaust fan. The system of the present invention has the simple structure and lower cost, which is easy to be reassembled, supervised and repaired. Some cooling plates are welded on the sides of the cell, and some exhausting tubes with special structure are also provided there. Thus the pipe orifice is near to the high temperature zone at the sides of the cell. By exhausting or blowing air via a tube, the high-temperature air layer near the high-temperature sidewall of the cell is destroyed and transferred, the air flow near the sidewall is enhanced, and the heat exchange by convection is improved, thus the aim to cool the cell is obtained.

IPC Classes  ?

• C25C 3/06 - Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium

Abstract

A pipe-type causticizer used in chemical industry is provided, especially, a pipe-type causticizer used to causticize inorganic salts in evaporation system in the preparation of alumina by the Bayer method is provided. The present pipe-type causticizer is consisted of pipe (8), steam heating jacket (7) disposed outside the pipe (8) and static mixing element (9) disposed inside the pipe (8), steam inlet (1) and condensation water outlet (2) connected with steam heating jacket (7). The inorganic salts are mixed with lime cream, then the mixture is fed into the pipe-type causticizer, the causticization reaction is completed in the conduit of the pipe-type causticizer by certain residence time and under the heat of steam in the heating jacket. During the reaction, the static mixing element inside the pipe-type causticizer can ensure quick reaction of the causticizing liquid. The device can save energy, and can make the reaction fully and completely.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• B01F 5/00 - Flow mixers; Mixers for falling materials, e.g. solid particles
• B01F 13/00 - Other mixers; Mixing plant, including combinations of dissimilar mixers

Abstract

The present invention discloses a feed apparatus of powder materials, more particularly a ration feed apparatus of alumina powder used in fume cleaning system of aluminum electrolysis. A fluidizing feed apparatus, the structure of which is as follows: a fluidization material reservoir (5) is connected with a potential fluidization material reservoir (4) through a porous plate, the lower part of which is perforated, the potential fluidization material reservoir (4) intercommunicates with a hopper (1), the fluidization material reservoir (5) intercommunicates with a discharging contain (12), the fluidization material reservoir (5) and the potential fluidization material reservoir (4) are provided with a gas inlet (10). The present invention may not only attain the object of feeding evenly and stably, but also be environment friendly, the structure of which is simple and easy to operate and manage.

IPC Classes  ?

• C25C 3/14 - Devices for feeding or crust breaking
• B65G 53/16 - Gas pressure systems operating with fluidisation of the materials
• B65G 53/22 - Gas pressure systems operating with fluidisation of the materials through a porous wall the systems comprising a reservoir, e.g. a bunker
• B01J 8/26 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
• C25C 3/22 - Collecting emitted gases

Abstract

A damming method for permeable red mud dam with red mud from sintering process comprises the following steps: building the dam body (1) of a red mud dam with red mud from sintering process layer by layer using hydraulic filling; laying drainage devices (2) in the dam body (1) at intervals as the dam rises.

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• C02F 101/10 - Inorganic 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
• E02B 7/00 - Barrages or weirsLayout, construction, methods of, or devices for, making same
• E02D 17/18 - Making embankments
• C01F 7/06 - Preparation of alkali metal aluminatesAluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

Abstract

An asphalt melting apparatus, in particular an asphalt melting apparatus used in the carbon or metallurgy industry, comprises an asphalt melting vessel (12), a manual asphalt valve (2), an asphalt filter (3) and an asphalt pump (4). The inlet of the asphalt melting vessel (12) is connected with a discharge port of a bucket conveyer (9). The asphalt melting vessel (12) communicates with a buffer vessel (13) and the buffer vessel (13) is connected with the asphalt pump (4). The apparatus has following advantages: the energy could be used efficiently and the melting rate could be raised; the automation of the whole melting process can be easilyrealized, cleaning and maintenance is convenient and labor intensity of workers could be reduced; the solid asphalt feed uses seal structure and the content of dust in workshop is low; asphalt fume is concentrated at the top of the asphalt melting vessel (12) and can be collected conveniently and centralized processed by a purifier.

IPC Classes  ?

• C10C 3/12 - Devices therefor
• C10C 3/10 - Melting

Abstract

A cleaning machine for cleaning the ferrophosphorus ring of the anode includes a left end axle (2) and a right end axle (6), each of which respectively installs on one side of a roller (14). The left end axle (2) connects with an air conduit (1); the right end axle (6) connects with a shaft coupling (9); the shaft coupling (9) connects with a reducer (10); the input end of the reducer (10) connects with a motor (12) via a brake (11); the roller (14) is provided with air exhausts (4) and a roller door (15); and the right end axle (6) is provided with a fresh air inlet (7). The cleaning machine can purge the carbon block impurities, electrolyte impurities and other impurities from the broken phosphorous pig iron to recycle the phosphorous pig iron. It can decrease the resistance between the ferrum and the charcoal, operate stably and safely, and it is of simple structure.

IPC Classes  ?

• B07B 4/06 - Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall using revolving drums
• B07B 11/00 - Arrangement of accessories in apparatus for separating solids from solids using gas currents
• B07B 9/02 - Combinations of similar or different apparatus for separating solids from solids using gas currents

Abstract

A control system and a control method for an overhead traveling crane to stack carbon blocks, include a PLC controller, several switches (1-11) for collecting signals, execution elements consisting of an electromagnet (7), an electric bottle (12), a lifting motor (17) and a traveling motor (2). The PLC controller receives the input signals from the switches, and then sends the directions to the execution elements. The chain action of the control system and method for the overhead traveling crane increases the automatic control scope, and avoid errors made by operators,

IPC Classes  ?

• B66C 13/22 - Control systems or devices for electric drives
• B66C 13/50 - Applications of limit circuits or of limit-switch arrangements
• B66C 1/44 - Gripping members engaging only the external or internal surface of the articles and applying frictional forces
• B66C 19/00 - Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries

Abstract

A conduit for a DC electromagnetic pump for delivering metal liquids. A conduit body (2) is an L-shaped construction. A heat conductive plate (4) and a mouthpiece (3) are provided at an L-shaped corner in the conduit body (2). An electric heater (5) is provided above the heat conductive plate (4) and mounted on an end cover (6). The end cover (6) is mounted on the top of the L-shaped corner of the conduit body (2). Moreover positive and negative electrodes (7) are provided on the end cover (6).

IPC Classes  ?

• H02K 44/04 - Conduction pumps

Abstract

An electromagnetic pump, especially a direct-current electromagnetic pump without external power source for transporting liquid metal, which is suitable for taping out liquid aluminum from an electrolytic cell. Wherein, the pump body (2) has a L-shape structure and a cathode (5) is arranged at the corner of the L-shape structure in the pump body (2). Two magnetic conduction plates (4) are oppositely arranged on the two sides of the L-shape structure in the pump body (2), and the two magnetic conduction plates are connected to N pole and S pole of an electromagnet (6) separately. The cathode (5) and the magnetic conduction plates (4) constitute a pump channel. An exciting winding (8) is wound on the electromagnet (6). The cathode (5) and the exciting winding (8) are all connected to a control box in situ. The present invention possesses simple structure, liability, smaller volume, economy and convenience to be repaired.

IPC Classes  ?

• C25C 3/06 - Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
• H02K 44/02 - Electrodynamic pumps
• B22D 35/04 - Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
• F04B 15/04 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive

Abstract

The structure of a device for fetching ingot, especially big aluminous ingot is, the swing device driving a clamp to swing is installed on machine frame (19), and the clamp that can be opened and closed is installed on the swing device. The invention has simple structure, it is convenient for using and its response is sensitive. It is easy for it to convey the big aluminous ingot on big aluminous ingot casting machine onto conveyor.

IPC Classes  ?

• B66C 17/12 - Overhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forgesOverhead travelling cranes comprising one or more substantially-horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports combined with auxiliary apparatus serving particular purposes for handling workpieces, e.g. ingots, which require to be supported temporarily within, or withdrawn from, a treatment chamber, e.g. tong cranes, soaking-pit cranes, stripper cranes
• B66C 1/42 - Gripping members engaging only the external or internal surface of the articles
• B22D 29/00 - Removing castings from moulds, not restricted to casting processes covered by a single main groupRemoving coresHandling ingots

Abstract

A cleaning unit assembly of two-man ladle comprises: a tilting mechanism for securing the ladle and driving it to tilt, reposit and rotate; a cleaning cutter (13) for cleaning the ladle; and a cutter controlling mechanism for controlling the rotation, feeding, retracting and horizontal movement of the cutter (13). A method for cleaning the two-man ladle is also disclosed. According to the present invention, the ladle-cleaning is performed in a mechanization way so as to achieve higher work efficiency, better cleaning quality and lower labor strength, greatly improve the working environment, enhance the intactness rate of the ladle and therefore increase its service life.

IPC Classes  ?

• B22D 43/00 - Mechanical cleaning, e.g. skimming of molten metals

Abstract

In a method of piling red mud, red mud from sintering process is conveyed to the red mud piling yard which is divided into three or more subdivisions, and is used for building a dam in a subdivision I at first. Upon the dam in the subdivision I reaches the desired altitude, the red mud from sintering process is transferred to a subdivision II and is used for building a dam therein, while red mud from Bayer process is piled in the subdivision I. Upon the dam in the subdivision II reaches the desired altitude, the red mud from sintering process is transferred to a subdivision III to build a dam therein, while the red mud piled in the subdivision I is under drying, and the red mud from Bayer process is piled in the subdivision II. Such that, the method of piling red mud with a circulation of building a dam using red mud from sintering process, piling red mud from Bayer process, and drying red mud by turns is established.

IPC Classes  ?

• C02F 11/00 - Treatment of sludgeDevices therefor
• C02F 101/10 - Inorganic 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
• E02D 17/18 - Making embankments
• C01F 7/06 - Preparation of alkali metal aluminatesAluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

Abstract

A side-end heat-preservation structure for aluminum electrolytic cell, especially a side-end heat-preservation structure suitable for aluminum electrolytic cell which has an aluminum collection reservoir located at its one end is disclosed. In the structure, a non-conducting anode (2) is suspended above the aluminum collection reservoir (1) located at the one end of the cell (6). The present invention can provide the heat preservation above the aluminum collection reservoir located at the one end of the electrolytic cell, while the integrality of the upper shell is insured. It can prevent the cover material from dropping into the aluminum collection reservoir, thus can insure the normal production of the cell. The present invention uses the function of the anode assembly, and the structure is simple and has remarkably effects.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

An aluminum electrolytic cell, especially an aluminum electrolytic cell using 150kA or more than 150kA is disclosed. The cell includes the shell, lining and the upper-structure. Carbon cathode blocks are set inside the lining and carbon anode blocks are set inside the upper-structure. A drained groove is formed between the carbon cathode blocks inside the lining, an Al-collecting ditch is formed at the midposition above the lining, and an aluminum collection reservoir is arranged at the cell port where the product is tapped. One end of the Al-collecting ditch is connected with the aluminum collection reservoir, and the material feeding spots are arranged between the anodes. The present invention can reduce the anode-cathode distance and improve the rate of utilization of the electric energy. It also can be realized that there is no liquid aluminum between the anode and the cathode during the production process of aluminum electrolysis, this can greatly reduce the effect of magnetic field on the stability of the production process.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes

Abstract

A technology of dissolving out red mud clinker and separating red mud in alumina manufacturing by series process. It comprises processes that the serous fluid which is dissolved out by wet mill of ball mill is poured into classifier, and overfall from the classifier flows into water cyclone, and overfall from the water cyclone flows into setting bath, and overfall from the setting bath is set to be desiliconized, and the classifier returns sand to ball mill, base flow from the water cyclone combines with base flow from setting bath, and then they are mixed with the secondary lotion of red mud and the mixture is sent to red mud washing process.

IPC Classes  ?

• C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates
• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• B03B 5/34 - Applications of hydrocyclones
• B03B 7/00 - Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage

Abstract

A stacking crane for carbon block includes a clamp for carbon block, adjustment pins, a beam device, a clamp limit device, and a balance pulley block. A horizontal beam (7) is hinged with the rotary hook (11), a fix hook (5) is mounted on a support frame (4), the rotary hook (11) and the fix hook (5) can engage or disengage, an electromagnet (15) is provided on one side of the rotary hook (11), one end of a moveable rod (14) is inserted in the electromagnet (15), the other end of the moveable rod (14) is connected with the rotary hook (11) by the hemispherical nut (12), the other end of the rotary hook (11) is connected with a spring (10), the electromagnet(15) is connected with an electrical source. Due to above structure, the invention can open the clamp exactly in every operation, and provides a simple structure, durable clamp, and low cost.

IPC Classes  ?

• B66C 11/00 - Trolleys or crabs, e.g. operating above runways
• B66C 1/44 - Gripping members engaging only the external or internal surface of the articles and applying frictional forces
• B66C 13/50 - Applications of limit circuits or of limit-switch arrangements
• B66C 13/06 - Auxiliary devices for controlling movements of suspended loads, or for preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
• B66C 9/14 - Trolley or crane travel drives
• B66C 9/16 - Travelling gear incorporated in, or fitted to, trolleys or cranes with means for maintaining alignment between wheels and track
• B66C 9/00 - Travelling gear incorporated in, or fitted to, trolleys or cranes
• B66C 7/16 - Devices specially adapted for limiting trolley or crane travelArrangements of buffer-stops

Abstract

A fume purifying process and system in baking anode used for production of aluminum by electrolysis is provided. The fume emitted from the anode-baking furnace is firstly passed through a cooling system to decrease the temperature of it; the cooled fume is then passed through an electric tar separator to trap most of the tars or asphalts in the fume; after that, the fume out of the separator is sent to a dry-scrubbing system to eliminate the solid fluoride, HF, dust and tar; the purified fume is discharged to the chimney by the main exhaust fan. The present invention has high fume purify efficiency and has no secondary pollution. It can purify not only the tars or asphalts and dust, but also the HF gas in the fume, thus can thoroughly purify all the pollutants.

IPC Classes  ?

• C25C 3/22 - Collecting emitted gases
• B01D 53/75 - Multi-step processes

Abstract

A two-stage aluminum fluoride recycling process and system of tail gas condensate from the aluminum fluoride producing system (8), the process comprising the following steps: introducing the tail gas condensate into a buffer tank (2) to reserve it; separating the tail gas condensate from the buffer tank (2) to produce a first aluminum fluoride solid and a solution; sending the separated solution into a depositing pool (5) to get a deposited second aluminum fluoride solid and a supernatant; returning the supernatant from the depositing pool (5) to the aluminum fluoride producing system (8).

IPC Classes  ?

• B01D 21/02 - Settling tanks
• C02F 9/02 - Multistep treatment of water, waste water or sewage involving a separation step
• C01F 7/50 - Fluorides

Abstract

A ground insulation resistance detecting device for electrolytic pot sets in an electrolytic aluminum factory includes an isolating transformer and a voltage signal converter. The one end of secondary side of the isolating transformer is connected with a divider resistance, an inductance coil for limiting electric current value, a first capacitance for insulating direct current in series, and is connected to the connecting cable for connecting with DC bus line. Another end of secondary side of the isolating transformer is connected to an end of a rectification bridge of which b and c ends are parallel connecting with a rheostat for adjustinga resistance and a capacitance for reducing pulsation of output voltage. The d end of the rectification bridge is connected to the grounding cable. A neutral grounding circuit is set between the midpoint of the electrolytic pot sets connected in series to DC bus line and the ground, and is used to detect neutral voltage of the electrolytic pot sets. A detecting method is used to the ground insulation resistance detecting device.

IPC Classes  ?

• G01R 27/02 - Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
• G01R 27/20 - Measuring earth resistanceMeasuring contact resistance of earth connections, e.g. plates
• G01N 27/04 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
• C25C 7/00 - Constructional parts, or assemblies thereof, of cellsServicing or operating of cells

Abstract

A clamp has an unpowered and automatic gripping unit, which includes a first engagement element (10), a drive mechanism (13), and a second engagement element (11). The drive mechanism (13) is connected with a rod (1) and transfers the up/down movement of the rod relative to the supporting base (3) to the first engagement element (10), so as to rotate the first engagement element (10); The second engagement element (11) is provided on said supporting base (3). The first engagement element (10) can rotate between an engagement position and a disengagement position, the first engagement element (10) engages with the second engagement element (11) at the engagement position, the first engagement element (10) disengages with the second engagement element (11) at the disengagement position. Thus, the clamp can realize the clamping action or loosening action when the clamp is raised or lowered, so that realizes the stacking operation for carbon blocks, without the help of the operator standing under the crane. The invention can reduce the hidden safety trouble and improve the work efficiency.

IPC Classes  ?

• B66C 1/44 - Gripping members engaging only the external or internal surface of the articles and applying frictional forces
• B66C 1/42 - Gripping members engaging only the external or internal surface of the articles

Abstract

An electric control system comprises a combined switch (SA), a conversion switch (SE), a startup pushbutton (SF), a stop pushbutton (SS), and a middle relay (KS). One end of the combined switch (SA) is connected between the conversion switch (SE) and the stop pushbutton (SS), the other end of the combined switch (SA) is connected with the carry-in terminal of the PLC system by a middle relay (KA3). The combined switch (SA) is connected with the startup pushbutton (SF) and the contactor coil (KM).

IPC Classes  ?

• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
• H02P 1/02 - Arrangements for starting electric motors or dynamo-electric converters Details

Abstract

A power supply device for a high-temperature electric balancer of rotary kiln flue with a waste heat boiler comprises a low-voltage switchboard (1), a high-temperature electric balancer control box (5), and an emergency power device (3) provided therebetween.

IPC Classes  ?

• H02J 9/00 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• F27D 17/00 - Arrangements for using waste heatArrangements for using, or disposing of, waste gases

Abstract

A configuration structure with inherent ventilation flues for a rectifier room includes air inlet windows (1) at the lower part of the wall facing each rectifier (2) and a vertical ventilation channel (3) on the rear and upper part of the rectifiers (2). Air exhaust windows (4) are set at the upper part of the vertical ventilation channel (3).

IPC Classes  ?

• H02B 1/56 - CoolingVentilation
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An antiwear bend for conveying material includes a feed pipe (1), a pipe body (2) and a discharge pipe(3), which form one sealing piece in a whole. The angle between the feed pipe and the discharge pipe is in the range of 120 to 150 degree. The pipe body is composed of an upright circumferential plate and a horizontal plate, which are perpendicular with each other. The horizontal plate is provided on the feeding path and connected with the discharge pipe. With the aid of the horizontal plate and the upright plate, the material can accumulate and form an impacting-slope, thus block off the material with the pipe wall as far as possible. Therefore, it can relieve the abrasion between material and pipe wall and increase the service life of the bend of conveying material.

IPC Classes  ?

• F16L 57/06 - Protection of pipes or objects of similar shape against external or internal damage or wear against wear
• F16L 43/00 - BendsSiphons
• B65G 53/52 - Adaptations of pipes or tubes

Abstract

A chain wheel suitable for using in a slot-like conveyor, which includes gear teeth (3) and a hub (5), both of them are separate structures. The gear teeth (3) are inlaid in the hub (5). The advantage of the chain wheel is the gear teeth (3) can be replaced quickly when they are wore out and there is no need to replace the entire chain wheel.

IPC Classes  ?

• F16H 55/30 - Chain wheels

Abstract

A mould and a heavy hammer are used for a cathode vibration shape machine. One mould and one heavy hammer might produce many specifications of cathode carbon block. The mould is a plug-board structure, and the heavy hammer is a slicing assembling structure, which mates with the mould.

IPC Classes  ?

• C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
• B28B 7/02 - Moulds with adjustable parts
• B28B 3/02 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein a ram exerts pressure on the material in a moulding spaceRam heads of special form
• B30B 11/04 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould

Abstract

The present invention discloses a dielectric isolation method of connecting rails between electrolysis plant and repairing plant that prevents the metallic connection between the insulated operation plane of electrolysis plant and the earth zero potential or the environment by the rails of portal transfer car. The invention belongs to the insulation technology of electrolysis plant. It lays insulated isolators on the rails between the electrolysis plant and electrolytic bath repairing plant at the exit of the electrolysis plant by making breaks on the rails. The distance between the breaks is a little larger than the wheel-base of the portaltransfer car to prevent the connection of the outer rails by the car. The invention effectively solves the insulation problem between the insulated region of operation plane in the electrolysis plant and the repairing plant, and the problem that the whole rail is difficult to be insulated.

IPC Classes  ?

• C25C 7/00 - Constructional parts, or assemblies thereof, of cellsServicing or operating of cells

Abstract

A vertical pipe provided with a microwave flow meter includes the microwave flow meter (1), a steel tube (2) and a medium pipe (3) to be measured, wherein the steel tube (2) is installed on the medium pipe (3) to be measured in a uptilting way.

IPC Classes  ?

• G01F 15/00 - Details of, or accessories for, apparatus of groups insofar as such details or appliances are not adapted to particular types of such apparatus

Abstract

The present invention refers to a liquid tank provided with a filling level measuring device, especially to a liquid tank provided with a radar filling level gauge and a overflow port in the vicinity of the tank top for containing easily foaming corrosive liquid. The liquid tank comprises a radar filling level gauge (1), a probe head (2) of the radar filling level gauge, a tank top (3), wherein the probe head (2) is above the tank top (3). In the present invention a steel tube is provided at the tank top, and the mounting position of the probe head of the radar filling level gauge is heightened, so the probe head (2) is above the tank top (3). Therefore when meeting with an accident, the probe head of the radar filling level gauge would not get in touch with the liquid, and the radar liquid level gauge would not be damaged, so reducing maintenance and production cost.

IPC Classes  ?

• B65D 90/48 - Arrangements of indicating or measuring devices
• F17C 13/02 - Special adaptations of indicating, measuring, or monitoring equipment
• G01F 23/28 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
• B65D 85/84 - Containers, packaging elements or packages, specially adapted for particular articles or materials for corrosive chemicals

Abstract

An alumina digesting apparatus, comprises the following devices: high pressure diaphragm pumps, double-pipe preheaters, pulse buffers, autoclaves with heating tube bundles, autoclaves and flash evaporators. The devices are connected successively by pipes according to leaching process. The apparatus enhances the output of alumina from 450kt/year by existing apparatus to above 500kt/year, so that productivity could be enhanced.

IPC Classes  ?

• C22B 3/02 - Apparatus therefor
• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C22B 21/00 - Obtaining aluminium

Abstract

A method and a furnace for electrical calcination enables utilization of volatile matters of petroleum coke or anthracite during electrical calcination, i.e. conventional calcination or semi-graphitization. The furnace includes an anode, a cathode, and a furnace body. The furnace body includes an annular inner wall, an annular fume duct disposed circumferentially outside of the annular inner wall, an annular outer wall for heat preservation disposed circumferentially outside of the annular fume duct, and an air passage disposed in the annular outer wall. The air passage is in communication with the fume duct and outer atmosphere, respectively. An outlet opening for the volatile matters, in communication with a hearth of the furnace body, is disposed in the fume duct. The combustible volatile matters of the petroleum coke, anthracite, or other raw material are sufficiently utilized during electrical calcination, therefore the energy is saved and the environmental pollution is reduced.

IPC Classes  ?

• F27D 7/06 - Forming or maintaining special atmospheres or vacuum within heating chambers
• H05B 3/00 - Ohmic-resistance heating

Abstract

A method for producing powdery alumina from low concentration solution by seed composition, it comprises a one-stage decomposition process. The decomposition tank used is a conventional flat-bottomed one with mechanical agitating means. The refined liquid from the sedimentation department and aluminium hydroxide seeds from the seeds filtration procedure are mixed, and then the mixture is charged into the first two tanks of the decomposition system, wherein the temperature of the first decomposition tank is 58-62 °C, the temperature of the last decomposition tank is 46-49 °C. The seed crystal coefficient is 2.0-2.5, the decomposition time is 60-62 hours, the concentration of the refined liquid is 90-100g/l by Na2Ok, and 80-90g/l by Al2O3. One portion of the decomposed aluminium hydroxide slurry is undergone the final product filtration procedure, and the other portion is undergone the seeds filtration procedure. The filter cake of the seeds filtration is merged with the refined liquid and returns to the first two decomposition tanks of the decomposition system. The method solves the problem of the dissolving procedure for treating high ferro content alumina trihydrate, in the sequence of aluminium and ferro, resulting in a better economical and social efficiency.

IPC Classes  ?

• C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates
• C01F 7/04 - Preparation of alkali metal aluminatesAluminium oxide or hydroxide therefrom
• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates

Abstract

A process for reducing the content of carbonates in the flow path of alumina production, which comprises substituting the shaft kiln for rotary kiln for lime calcining in the production of aluminum oxide, wherein the content of carbon dioxide in the lime is 23%. Instead of the current sintering method for Bayer process alkali supplementing procedure, it employs liquid caustic alkali containing NaOH ≥ 42% to supplement alkali into the Bayer process system. The process can reduce the content of carbonate in the process, which would eliminate the negative affect of carbonate and improve the efficiency of heat exchanger.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates

Abstract

The invention discloses a novel red mud conveying and filtering process in aluminum oxide production, which consists of loading the red mud slurry from the final level washing and settling bath in sedimentation workshop into a red mud slurry tank through cascade centrifugal pumps and pipes, charging a portion of hot-water, pumping into a red mud pressing filter for press filtration, transferring the obtained dust cakes to various discharging spots of red mud storage through automobiles, storing the red mud with dry method, returning the washed red mud cleaning solution after press filtration to sedimentation workshop of alumina plants for washing.

IPC Classes  ?

• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• C02F 11/00 - Treatment of sludgeDevices therefor
• C01F 7/00 - Compounds of aluminium
• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates

Abstract

The invention discloses a crude red mud filtrating and washing process, which consists of loading the crude red mud slurry from the red mud grading procedure into horizontal band filters or flat disc type filters for filtrating and washing, wherein a distribution head on the filters divides the whole filter into a separation zone and a washing zone, loading the crude liquor obtained in the separation zone into a desiliconization procedure, supplying the filter cakes from the separation area into the washing zone to proceed reversal washing for two to three times, loading the washed red mud cleaning solution to a dissolving procedure, loading the washed crude red mud to sponge ironworks for reclamation of iron.

IPC Classes  ?

• C01F 7/00 - Compounds of aluminium
• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C02F 11/00 - Treatment of sludgeDevices therefor

Abstract

A process for increasing solid content in ore pulp is disclosed, it is characterized in that an ore pulp concentration device is added behind the cyclone of the conventional technique. The process comprises the following steps: feeding the crude ore pulp with a solid content of 250-300g/l from the overflow port of cyclone in the conventional raw material grinding step into an added extra cyclone for concentrating, after which the solid content in the underflow amounting to 600-800g/l, conveying the underflow as a product to atmospheric pressure desilicification step, and returning the overflow after concentration into the intermediate pumping tank for circulation grading and condensing. The process can increase the solid content of ore pulp effectively, improve the technique index of desilicification procedure, and save the expense of the project. The process is used for the raw material grinding procedure.

IPC Classes  ?

• C01F 7/02 - Aluminium oxideAluminium hydroxideAluminates
• C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates
• C01F 7/06 - Preparation of alkali metal aluminatesAluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

Abstract

A process for dissolving high ferro content gibbsite. It is characterized in that, dissolving is proceeded at low temperature, atmospheric pressure, and low alkali concentration. The dissolving conditions are: alkali concentration Na2Ok of the circulation mother liquor is 140-150g/l, the dissolving temperature is 105-108°C, the dissolving pressure is atmospheric pressure, the dissolving time is 10-15 min, the fineness of the primary ore pulp should be able to pass 20 mesh screen, and the pressure of the heating steam is 0.6 MPa. The process can be used to satisfy the requirement for dissolving high ferro content gibbsite in our country, saving not only a great deal of project expense, but also the consumption of steam.

IPC Classes  ?

• C01F 7/06 - Preparation of alkali metal aluminatesAluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
• C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates