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Method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium and manganese from battery black powder

A technology of battery grade and black powder, which is applied in the field of battery grade manganese sulfate by separating nickel, cobalt, lithium and manganese from battery black powder, which can solve the problems of poor economy, high production cost, and small processing capacity, so as to improve production efficiency and reduce extraction The effect of high production costs

Pending Publication Date: 2021-07-13
ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium, and manganese from battery black powder, and aims to solve the problems of poor economy, small processing capacity, and production cost in the existing high-manganese ternary black powder processing technology advanced questions

Method used

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  • Method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium and manganese from battery black powder

Examples

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Embodiment 1

[0023] A method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium, and manganese from battery black powder, comprising the following steps: 1) slurrying the positive and negative electrode powders of waste high-manganese ternary lithium-ion batteries, adding concentrated sulfuric acid to carry out a stage of stirring and leaching, In this process, the pH value is controlled at 1.4, the temperature is 85°C, and hydrogen peroxide is added in a molar amount of 0.8 times the cobalt content; the leachate is subjected to pressure filtration, and the content of nickel and cobalt in the filtrate is high, and the content of manganese is low. The leaching rate of lithium at this stage can be It reaches more than 98%. After removing iron and aluminum by adjusting the Ph value, it enters the extraction production line for extraction treatment to separate manganese, cobalt, nickel and lithium; the filter residue is used as the raw material for the second-sta...

Embodiment 2

[0025] A method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium, and manganese from battery black powder, comprising the following steps: 1) slurrying the positive and negative electrode powders of waste high-manganese ternary lithium-ion batteries, adding concentrated sulfuric acid to carry out a stage of stirring and leaching, In this process, the pH value is controlled to be less than 1.5, the temperature is 85-95°C, and sodium sulfite is added in a molar amount that is 1.2 times the cobalt content; the leachate is subjected to pressure filtration, and the filtrate contains high nickel and cobalt content and low manganese content. Lithium leaching at this stage The efficiency can reach more than 98%. After removing iron and aluminum by adjusting the Ph value, it enters the extraction production line for extraction treatment to separate manganese, cobalt, nickel and lithium; the filter residue is used as the raw material for the second-stage...

Embodiment 3

[0027] A method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium, and manganese from battery black powder, comprising the following steps: 1) slurrying the positive and negative electrode powders of waste high-manganese ternary lithium-ion batteries, adding concentrated sulfuric acid to carry out a stage of stirring and leaching, This process controls the Ph value to be less than 1.5, the temperature is 85-95°C, and sodium thiosulfate is added according to the molar amount of 0.8-1.2 times the cobalt content; the leachate is subjected to pressure filtration, and the content of the filtrate is higher in nickel and cobalt, and the content of manganese is lower. The leaching rate of lithium at this stage can reach more than 98%. After removing iron and aluminum by adjusting the Ph value, it enters the extraction production line for extraction treatment to separate manganese, cobalt, nickel and lithium; the filter residue is used as the raw materia...

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Abstract

The invention relates to a method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium and manganese from battery black powder. The method comprises the following steps: 1) slurrying the battery black powder, adding concentrated sulfuric acid, performing first-stage agitation leaching, controlling the pH value to be less than 1.5 and the temperature to be 85-95 DEG C, and adding a reducing agent; (2) carrying out filter pressing on the first-stage leachate, removing iron and aluminum from filtrate by adjusting the pH value, and then carrying out extraction treatment to separate manganese, cobalt, nickel and lithium, and taking filter residues as raw materials for second-stage leaching; 3) carrying out second-stage reduction leaching on filter residues produced by the first-stage filter pressing, adding the reducing agent, controlling the pH value to be less than 1.5, and controlling the temperature to be 85-95 DEG C; (4) carrying out filter pressing on the leachate, and washing filter residues to obtain graphite residues; 5) adding barium sulfide into the filtrate subjected to second-stage filter pressing, controlling the temperature to be 55-70 DEG C and the pH value to be 3.5-4.5, and reacting for 1-3 hours; (6) carrying out filter pressing on the nickel and cobalt removed solution, wherein the filtrate is a manganese sulfate solution; and 7) adding sodium dimethyl dithiocarbamate and sodium fluoride into the manganese sulfate solution, and carrying out filter pressing to obtain the battery-grade manganese sulfate solution.

Description

technical field [0001] The invention belongs to the technical field of recovery and treatment of waste lithium batteries, in particular to a method for preparing battery-grade manganese sulfate by separating nickel, cobalt, lithium and manganese from battery black powder. Background technique [0002] China is the world's largest producer of lithium-ion batteries, and the lithium-ion battery industry has become one of the high-tech industries supported by the state. Among them, high-manganese ternary lithium-ion batteries are widely used in two-wheel and three-wheel electric vehicles, and the amount of scrapping is even more considerable. The disposal of waste products and production waste in the lithium-ion battery industry has become an urgent problem to be solved in the clean production of the lithium-ion battery industry. Waste lithium-ion batteries are typical solid wastes. Their resource utilization can not only solve the environmental problems caused by waste lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10C22B7/00C22B47/00C22B23/00C22B26/12
CPCC01G45/10C22B7/007C22B47/00C22B23/043C22B26/12C01P2006/80Y02P10/20
Inventor 孔繁振甄爱钢姚建友蔡文雨马佳丁伯芬凌怊刘元龙吕昀城
Owner ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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