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Selective extraction recycling method of waste ternary lithium battery

A ternary lithium battery and recycling method technology, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve problems such as poor industrial operability and lengthy process flow

Active Publication Date: 2019-03-15
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the first technical route requires a complex element chemical separation process, the process is lengthy, and the industrial operability is poor; the second technical route is relatively simple, but lithium needs to be extracted from the system before it can be combined with the existing The preparation technology of the ternary material precursor is in line

Method used

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  • Selective extraction recycling method of waste ternary lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Mix 1 kg of waste ternary lithium battery cathode material with 5 kg of phosphoric acid solution with a concentration of 1 mol / L for slurry preparation, raise the temperature of the reaction system to 60°C, and continue stirring at a speed of 50 r / min for 20 minutes to obtain a mixed slurry;

[0074] Add 5 mol of hydrogen peroxide to the mixed slurry at a constant speed, and continue to add the hydrogen peroxide for 1 hour. After the oxidation-reduction reaction, add a sodium hydroxide solution with a mass concentration of 40wt.% to adjust the pH value to adjust the mixed slurry. pH value of the feed to 3.0;

[0075] After performing the aging operation on the mixed slurry for 0.5h, the first filtering operation is carried out by adopting the intermittent pressurization and decompression filtering operation method to obtain the first filtrate rich in lithium ions, and the first filtrate rich in nickel, cobalt, and manganese. The first filter residue of the element, and ...

Embodiment 2

[0082] Mix 1 kg of waste ternary lithium battery cathode material with 10 kg of phosphoric acid solution with a concentration of 2 mol / L for slurry preparation, raise the temperature of the reaction system to 70°C, and continue stirring at a speed of 40 r / min for 25 minutes to obtain a mixed slurry;

[0083] Add 10 mol of hydrogen peroxide to the mixed slurry at a constant speed, and continue to add the hydrogen peroxide for 2 hours. After the oxidation-reduction reaction, add a sodium hydroxide solution with a mass concentration of 30wt.% to adjust the pH value to adjust the mixed slurry. pH value of the material to 3.5;

[0084] After performing the aging operation on the mixed slurry for 0.5h, the first filtering operation is carried out by adopting the intermittent pressurization and decompression filtering operation method to obtain the first filtrate rich in lithium ions, and the first filtrate rich in nickel, cobalt, and manganese. The first filter residue of the elemen...

Embodiment 3

[0091] Mix 1 kg of waste ternary lithium battery positive electrode material with 15 kg of phosphoric acid solution with a concentration of 3.5 mol / L for slurry preparation, raise the temperature of the reaction system to 75°C, and continue stirring at a speed of 48 r / min for 23 minutes to obtain a mixed slurry ;

[0092] Add 12 mol of hydrogen peroxide to the mixed slurry at a constant speed, and continue to add the hydrogen peroxide for 5 hours. After the oxidation-reduction reaction, add a sodium hydroxide solution with a mass concentration of 35wt.% to adjust the pH value to adjust the mixed slurry. pH value of the material to 3.8;

[0093]After performing the aging operation on the mixed slurry for 1.5 hours, the first filtering operation was performed by adopting the intermittent pressurization and decompression filtering operation method to obtain the first filtrate rich in lithium ions, and the first filtrate rich in nickel, cobalt, and manganese. The first filter res...

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Abstract

Disclosed is a selective extraction recycling method of a waste ternary lithium battery. The method includes the following steps: a waste ternary lithium battery anode material and a phosphoric acid solution are mixed to prepare a pulp, then hydrogen peroxide is added to carry out an oxidation-reduction reaction and regulate the pH value, a first filtrate rich in lithium ions is obtained after aging and filtering, water is added to dissolve a first filter residue, and then potassium cyanide is added to obtained a second filtrate rich in Ni(CN)4<2-> ions, the second filtrate is then subjected to electrolysis to obtain elemental nickel, ammonium hydroxide is added to a second filter residue subsequently, and a third filtrate rich in Co[(NH3)x]<2+> ions and manganese phosphate precipitation are obtained after filtering, and finally, a third filtrate is heated to obtain cobaltous phosphate. In this way, the selective extraction recycling method of a waste ternary lithium battery, which isprovided by the invention has better industrial operability through the design of a simpler and more rational overall process. In the meanwhile, a ternary element and elemental lithium that can be directly used in industry can be obtained pertinently.

Description

technical field [0001] The invention relates to the field of lithium battery recovery, in particular to a method for selective extraction and recovery of waste ternary lithium batteries. Background technique [0002] At present, the methods for recovering valuable metal elements from waste ternary lithium battery cathode materials can be divided into two main technical routes according to different end products: one is to use extraction method or selective precipitation method or selective oxidation method or electrolysis method to separate and recover valuable metal elements, and prepare corresponding salts or metal oxides or metal elements; the second is to dissolve the ternary materials, remove iron, aluminum, copper and other impurity elements by extraction, and then extract the Introduce nickel, cobalt, and manganese salts, adjust the molar ratio of these three elements, and add a mixed lye of ammonia water and sodium hydroxide to prepare a ternary material precursor. ...

Claims

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Application Information

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IPC IPC(8): H01M6/52H01M10/54C22B7/00C22B26/12C22B47/00C22B23/00C25C1/08
CPCC22B7/007C22B23/0415C22B26/12C22B47/00C25C1/08H01M6/52H01M10/54Y02W30/84Y02P10/20
Inventor 祝宏帅李亚德袁中直陈翔李刚
Owner EVE ENERGY CO LTD
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