Method for recycling waste lithium battery and preparing ternary precursor

A technology of waste lithium battery and recovery method, which is applied in the field of waste lithium battery recovery and preparation of ternary precursors, can solve the problems of many types of extractants, large area, long process flow, etc., and achieves large storage area. , The effect of small storage area and lower production cost

Pending Publication Date: 2021-12-17
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manganese sulfate, cobalt sulfate and nickel sulfate prepared by this method have high purity, but

Method used

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  • Method for recycling waste lithium battery and preparing ternary precursor
  • Method for recycling waste lithium battery and preparing ternary precursor
  • Method for recycling waste lithium battery and preparing ternary precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of recovery of waste lithium battery and the method for preparing ternary precursor, refer to figure 1 , the specific process is:

[0040] (1) Disassemble, crush, sort and sieve the waste ternary lithium batteries to obtain powdery battery powder and aluminum slag. After finely crushing the aluminum slag, pass through a 100-mesh sieve to obtain aluminum slag Powder, powdered battery powder is roasted in a nitrogen atmosphere at 600 ° C for 3.5 hours;

[0041] (2) Add the calcined battery powder to pure water with a liquid-solid ratio of 3:1mL / g to make a slurry, then add calcium chloride 1.5 times the theoretical amount required for the reaction, stir and leach at 80°C, react for 60 minutes and then filter to obtain Nickel-cobalt-manganese slag and lithium chloride solution, after the nickel-cobalt-manganese slag is washed, the lotion is merged into the lithium chloride solution, and the leaching rate of lithium reaches 97% through testing and calculation, and t...

Embodiment 2

[0050] A method for recycling waste lithium batteries and preparing a ternary precursor, the specific process is:

[0051] (1) Disassemble, crush, sort and sieve the waste ternary lithium batteries to obtain powdery battery powder and aluminum slag. After finely crushing the aluminum slag, pass through a 100-mesh sieve to obtain aluminum slag Powder, battery powder roasted in nitrogen atmosphere at 800°C for 2h;

[0052] (2) Add the roasted battery powder to pure water with a liquid-solid ratio of 5:1mL / g to make slurry, then add magnesium chloride 2.0 times the theoretical amount required for the reaction, stir and leach at 60°C, react for 40 minutes and filter to obtain nickel-cobalt Manganese slag and lithium chloride solution, after the nickel-cobalt-manganese slag is washed, the lotion is merged in the lithium chloride solution, and the leaching rate of lithium reaches 98% through testing and calculation, and the lithium chloride solution is concentrated to a lithium conc...

Embodiment 3

[0061] A method for recycling waste lithium batteries and preparing a ternary precursor, the specific process is:

[0062] (1) After the waste ternary lithium battery is discharged, it is disassembled, crushed, sorted and screened to obtain powdered battery powder and aluminum slag. After the aluminum slag is finely broken, it is processed through a 100-mesh sieve to obtain aluminum slag powder, and the battery powder is roasted in a nitrogen atmosphere at 500°C for 5 hours;

[0063] (2) Add the calcined battery powder to pure water with a liquid-solid ratio of 4:1mL / g to make a slurry, then add aluminum chloride 1.3 times the theoretical amount required for the reaction, stir and leach at 70°C, react for 50 minutes and filter to obtain Nickel-cobalt-manganese slag and lithium chloride solution, after the nickel-cobalt-manganese slag is washed, the washing liquid is combined into the lithium chloride solution, and the leaching rate of lithium reaches 98% through detection and ...

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Abstract

The invention discloses a method for recycling a waste lithium battery and preparing a ternary precursor. The method comprises the following steps of pretreating the waste lithium battery to obtain battery powder and aluminum slag, roasting the battery powder, adding water into the roasted battery powder to prepare slurry, adding metal chloride to carry out leaching reaction, and carrying out solid-liquid separation to obtain nickel-cobalt-manganese slag and a lithium chloride solution; adding sulfuric acid into nickel-cobalt-manganese slag for acid leaching, adding aluminum slag into an acid leaching solution to remove copper, adjusting the pH value of the acid leaching solution to remove aluminum, mixing the aluminum-removed solution with a compound extraction agent, extracting to obtain a manganese-containing organic phase and a nickel-cobalt-containing raffinate, wherein the organic phase can be used for preparing manganese sulfate, and the raffinate can be used for preparing a high-purity nickel-cobalt sulfate mixed crystal through crystallization; and after the obtained battery-grade manganese sulfate and nickel-cobalt sulfate mixed crystal is dissolved in water, a certain amount of nickel-cobalt-manganese sulfate is supplemented to prepare a ternary precursor. The recovery process route provided by the invention has the advantages of simplicity in operation, low production cost, stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium batteries, and in particular relates to a method for recycling waste lithium batteries and preparing a ternary precursor. Background technique [0002] With the rapid development of my country's economy, the demand for consumer 3C digital electronic products and new energy vehicles is increasing, and most of these products use lithium-ion batteries as energy carriers. Since lithium-ion batteries have a service life, So as time goes by, more and more lithium-ion batteries will be scrapped. Lithium-ion batteries contain metal resources such as lithium, nickel, cobalt, manganese, iron, copper, aluminum, etc. If these scrapped lithium-ion batteries are discarded at will, it will not only cause waste of resources, but also pollute the environment, so it is necessary to recycle them. [0003] The wet recovery process of nickel-cobalt-manganese ternary lithium batteries first needs to dis...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/12C22B47/00C22B23/00C22B3/38H01M10/54C01G53/00C01G53/10C01G51/10C01G45/10C01D15/08
CPCC22B7/006C22B26/12C22B23/0407C22B47/00H01M10/54C01G53/006C01G53/003C01G53/10C01G51/10C01G51/003C01G45/003C01G45/10C01D15/08C01P2006/80Y02P10/20Y02W30/84
Inventor 欧阳石保李长东乔延超陈若葵阮丁山蔡勇
Owner GUANGDONG BRUNP RECYCLING TECH
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