Abstract: A device for removing iron from a nickel-cobalt-manganese sulfuric acid solution and a method for continuously removing iron ions from a nickel-cobalt-manganese sulfuric acid solution. The device has an iron removal reactor (2) having a stirrer (3) and an iron removal reactor inner cylinder (5) and an aging reactor (9) having an aging reactor stirrer (7) and an automatic stone powder feeder (8), a mixing feed pipe (12) and a carbonate solution feed pipe (4) are arranged in an interlayer between the iron removal reactor (2) and the iron removal reactor inner cylinder (5), a mixer (1) for a preheating the device is arranged at a top of the mixing feed pipe (12), a compressed air inlet (11) and a feed inlet (10) of a solution to be subjected to iron removal are arranged in the mixer (1). Further disclosed is a method for removing iron of the device.

Abstract: The invention discloses a method and crystallization device for preparing electronic-grade nickel sulfate from nickel powder, and a control method of the crystallization device, and relates to the technical field of non-ferrous metal hydrometallurgy. The method comprises: oxidation, cooling, acid leaching, copper removal, acid adjustment, concentration, cooling crystallization, drying and screening, and secondary leaching: the oxidation comprises: controlling a temperature of nickel powder in a calcining furnace to be 400° C. to 700° C., allowing a use amount of compressed air for each kilogram of nickel powder to be 1 m3 to 5 m3, and making the reaction last for 1.0 hour to 2.5 hours; and the acid leaching comprises: placing cooled nickel oxide in a reactor, controlling a temperature to be 45° C. to 70° C., adding dilute sulfuric acid to control a pH value to be 0.5 to 1.5, and making the reaction last for 1 hour to 3 hours.

Abstract: Disclosed are a method and device for extracting and preparing battery-grade lithium carbonate from a P507 raffinate. The method comprises steps of impurity adjustment, extraction, purification, reverse extraction, alkalization, crystallization, separation, drying, the impurity adjustment comprises: adjusting a pH value of the P507 raffinate to be 8.5 to 10.5 with lithium hydroxide or alkali, and filtering to obtain a filtrate for later use; the alkalization comprises: heating a lithium solution to 85° C. to 95° C., adding lithium hydroxide or alkali to adjust a pH value to be 9.0 to 13.0, maintaining a temperature at 85° C. to 95° C. and standing for 2 hours to 8 hours, and then filtering to obtain a filtrate for later use; and the crystallization comprises: introducing compressed air into the filtrate after alkalization, evaporating and concentrating at the same time, and discharging and cooling when fine crystals exist in the concentrated solution.

Abstract: A method for disassembling and separating a waste lithium-ion battery comprises: directly tearing a battery pack or a cell of the waste lithium-ion battery with water and electricity without discharging after removing a housing, then performing first wet screening, directly performing wet degumming without drying after recovering an electrolyte and removing iron by magnetic separation, then performing first crushing with water, third wet screening and second crushing with water after performing second wet screening, and finally performing jigging separation to obtain copper powder, aluminum powder, positive and negative electrode materials, plastic powder and separator pulp.

Abstract: A comprehensive recycling method for a waste lithium iron phosphate battery relates to a waste lithium ion battery recycling technology, and particularly comprises: first selectively extracting lithium, and then using a lithium extraction residue to prepare iron phosphate, the using the lithium extraction residue to prepare the iron phosphate comprising: adding the lithium extraction residue to water to form a slurry, adding hydrochloric acid and stirring to react, so that iron is completely dissolved, performing solid-liquid separation, on the basis of iron and phosphorus contents of the obtained liquid, adding trisodium phosphate or ferric chloride, and then adding a sodium hydroxide solution to precipitate crude iron phosphate; and then performing reverse three-stage washing to remove impurities to obtain a battery iron phosphate product. The problem of environmental protection is solved and meanwhile, all of the valuable elements are recycled, and a relative cost is greatly reduced by about 25%.

Abstract: A manganese-lithium separation process and a pre-extraction solution preparation process in comprehensive recovery of ternary battery wastes, and a method for comprehensive recovery of cobalt, nickel, manganese and lithium elements from the ternary battery wastes, relates to a method for recycling battery wastes. According to the present disclosure, cobalt and nickel ions are separated from an impurity-removed solution by a hydrolysis method; manganese, lithium and other ions in the impurity-removed solution are free from an extraction procedure, so that most manganese ions are separated and removed by a wet method before extraction, to prevent the manganese ions from entering the extraction system; nickel ions are free from an extraction procedure of full extraction and full back-extraction; and nickel hydroxide is directly precipitated after related impurities are removed by extraction.

Abstract: The present disclosure provides a method for preparing lithium carbonate from lithium iron phosphate battery scraps and lithium carbonate thereof, and relates to a method for preparing lithium carbonate from lithium iron phosphate battery scraps and a lithium carbonate product thereof. The method specifically includes the following steps; performing oxidative acidolysis on a lithium iron phosphate material, thickening lithium solution, adding alkali to remove iron, and precipitating lithium carbonate, thereby obtaining a filter cake which is a lithium carbonate product. Lithium may be directly extracted by utilizing the lithium iron phosphate battery scraps. A technical problem in the prior art that lithium iron phosphate battery wastes cannot be effectively decomposed and recycled is solved. The method has the characteristics of simple process, high, lithium yield, and low production cost.

Abstract: A method for preparing nickel/manganese/lithium/cobalt sulfate and tricobalt tetraoxide from battery wastes adopts the following process: dissolving battery wastes with acid, removing iron and aluminum, removing calcium, magnesium and copper, carrying extraction separation, and carrying out evaporative crystallization to prepare nickel sulfate, manganese sulfate, lithium sulfate, cobalt sulfate or/and tricobalt tetraoxide. By using the method, multiple metal elements, such as nickel, manganese, lithium and cobalt, can be simultaneously recovered from the battery wastes, the recovered products are high in purity and can reach battery grade, battery-grade tricobalt tetraoxide can also be directly produced. The method is simple in process, low in energy consumption and free in exhaust gas pollution, and can realize zero release of wastewater.

Abstract: A method for preparing industrial grade lithium carbonate from crude lithium fluoride includes the following steps: a, pulping by stirring crude lithium fluoride into a pulp, and adding an acid to prepare a crude lithium fluoride pulp-like material; b, double decomposition by adding the lithium fluoride pulp-like material obtained in the step a into a boiling calcium chloride solution, and then adding an alkaline substance to obtain a lithium chloride solution; c, lithium carbonate precipitation by heating the lithium chloride solution obtained in the step b, adding a carbonate solution according to the mass of lithium in the lithium chloride solution, stirring at a constant temperature, and filtering, wherein the filter cake is a lithium carbonate product. The lithium fluoride is decomposed at one time in a low-acidity environment; fluoride ions are removed; and a double decomposition reaction is used to decompose the lithium fluoride into lithium ions and calcium fluoride precipitates.

Abstract: A method for recovering lithium from low-content extraction tailwater and recycling extraction tailwater is provided. The disclosure is characterized that recovery of lithium from lithium-containing extraction tailwater is achieved by adding calcium to remove fluorine, carrying out evaporative crystallization and precipitating lithium salts. Recycle of extraction tailwater is achieved by adopting the following steps: in the lithium-containing extraction tailwater, adding calcium to remove fluorine, carrying out evaporative crystallization, recovering condensate water, precipitating a lithium salt and recycling mother liquor. According to the disclosure, lithium is recovered from low-content extraction tailwater via enrichment and sodium sulfate and distilled water therein are incidentally recovered, so that zero release of battery waste treatment wastewater is achieved.

Abstract: A method for preparing nickel/manganese/lithium/cobalt sulfate and tricobalt tetraoxide from battery wastes adopts the following process: dissolving battery wastes with acid, removing iron and aluminum, removing calcium, magnesium and copper, carrying extraction separation, and carrying out evaporative crystallization to prepare nickel sulfate, manganese sulfate, lithium sulfate, cobalt sulfate or/and tricobalt tetraoxide. By using the method, multiple metal elements, such as nickel, manganese, lithium and cobalt, can be simultaneously recovered from the battery wastes, the recovered products are high in purity and can reach battery grade, battery-grade tricobalt tetraoxide can also be directly produced. The method is simple in process, low in, energy consumption and free in exhaust gas pollution, and can realize zero release of wastewater.

Abstract: A method for recovering lithium from low-content extraction tailwater and recycling extraction tailwater is provided. The disclosure is characterized that recovery of lithium from lithium-containing extraction tailwater is achieved by adding calcium to remove fluorine, carrying out evaporative crystallization and precipitating lithium salts. Recycle of extraction tailwater is achieved by adopting the following steps: in the lithium-containing extraction tailwater, adding calcium to remove fluorine, carrying out evaporative crystallization, recovering condensate water, precipitating a lithium salt and recycling mother liquor. According to the disclosure, lithium is recovered from low-content extraction tailwater via enrichment and sodium sulfate and distilled water therein are incidentally recovered, so that zero release of battery waste treatment wastewater is achieved.

Abstract: A method for preparing industrial grade lithium carbonate from crude lithium fluoride includes the following steps: a, pulping by stirring crude lithium fluoride into a pulp, and adding an acid to prepare a crude lithium fluoride pulp-like material; b, double decomposition by adding the lithium fluoride pulp-like material obtained in the step a into a boiling calcium chloride solution, and then adding an alkaline substance to obtain a lithium chloride solution; c, lithium carbonate precipitation by heating the lithium chloride solution obtained in the step b, adding a carbonate solution according to the mass of lithium in the lithium chloride solution, stirring at a constant temperature, and filtering, wherein the filter cake is a lithium carbonate product. The lithium fluoride is decomposed at one time in a low-acidity environment; fluoride ions are removed; and a double decomposition reaction is used to decompose the lithium fluoride into lithium ions and calcium fluoride precipitates.