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Method for recycling all components of waste lithium battery

A waste lithium battery, full component technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problem of long discharge cycle, recovery rate of electrode powder, low grade, strong electrolyte smell, etc. in the salt water discharge process problems, to achieve the effect of improving the recovery rate of the powder, improving the recovery rate and grade, and large particle size

Inactive Publication Date: 2022-03-08
HUNAN JIANG YE MECHANICAL & ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process has the following problems: (1) The discharge cycle of the salt water discharge process is long, and the water body is seriously polluted
(2) The black powder on the production site is serious, the electrolyte smells strong, and the production environment is poor
(3) Using multi-stage crushing and grinding process to peel off the pole powder, resulting in low recovery rate and grade of pole powder, copper and aluminum doping with each other, making it impossible to separate
(4) The electrolyte is untreated, and the aluminum foil is ground into powder, all of which have potential safety hazards

Method used

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  • Method for recycling all components of waste lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Transport the scrap lithium iron phosphate battery to the crusher through the automatic feeding device.

[0030] 2) In a shear crusher with a sealed cavity and filled with nitrogen protection, the charged scrap lithium iron phosphate battery is sheared and crushed once, and the particle size of the crushed material is 30mm.

[0031] 3) The crushed material directly enters the low-temperature volatilization furnace to volatilize the electrolyte, and volatilizes in a sealed converter filled with nitrogen protection. The volatilization time is 1 hour and the volatilization temperature is 120°C.

[0032] 4) Use a vibrating screen to screen the fine-grained materials from the products after low-temperature volatilization, and then use a vertical winnowing machine to select the light product diaphragm, positive and negative electrode sheets, heavy product casing, and pile head.

[0033] 5) The septum, casing, and stigma sorted out in step 4) are cleaned by a cleaning devic...

Embodiment 2

[0040] Use the feeding, crushing, low-temperature volatilization, multi-component sorting, and pyrolysis procedures in Example 1 to process the waste lithium iron phosphate battery cells, and the obtained positive and negative electrodes are stripped by wet method, and the mass fraction is 0.5%. Soak in dilute sulfuric acid for 5 minutes, then sieve through a vibrating sieve and wash with high-pressure water. The slurry under the sieve is filtered through a filter press to obtain wet pole powder, and the filtrate is returned for reuse. The post-drying treatment process of the oversize is the same as in Example 1.

[0041] The grade of the final electrode powder obtained is 98%, and the recovery rate is 98%; the grade of copper foil and aluminum foil is 99%, and the recovery rate is 97%; the grade of the shell and column head is 99%, and the recovery rate is 96%.

Embodiment 3

[0043] Using the process in Example 1 to process waste ternary lithium-ion battery monomers, the grade of the finally obtained pole powder is 96%, and the recovery rate is 96%; the grade of copper foil and aluminum foil is 99%, and the recovery rate is 96%; the grade of the shell and the column head is 99%. %, the recovery rate is 96%.

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Abstract

The invention discloses a method for recycling all components of a waste lithium battery. The method comprises the steps of electrified crushing, low-temperature volatilization, winnowing separation, high-temperature pyrolysis, screening and stripping, color sorting, centralized treatment of tail gas and the like under anaerobic and closed conditions. According to the method, all-component recovery and resource maximization of the waste lithium battery can be realized, the recovery rate of each component is high, the product purity is high, the polar powder recovery rate is 96%-98%, and the grade is 96%-98%; the recovery rate of copper foil and aluminum foil is 95-98%, and the grade is 99%; the recovery rate of shells and column heads is 95-98%, and the grade is 95-98%.

Description

technical field [0001] The invention relates to the recycling of lithium batteries, in particular to a method for recycling all components of waste lithium batteries. Background technique [0002] With the vigorous development of the new energy field, lithium battery recycling has become an indispensable and important link in this field. The current technology on the market is to use salt water discharge, multi-stage crushing, and then recover valuable lithium batteries through gravity separation. Element. The process has the following problems: (1) The discharge cycle of the salt water discharge process is long and the water body is seriously polluted. (2) The black powder on the production site is serious, the electrolyte has a strong smell, and the production environment is poor. (3) Using multi-stage crushing and grinding process to peel off the powder, resulting in low recovery rate and grade of powder, copper and aluminum doped with each other, making it impossible t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00F23G5/033F23G5/02F23G5/027F23G7/06F23G5/14F23J15/06F23J15/04H01M10/54
CPCF23G7/003F23G5/033F23G5/02F23G5/027F23G7/06F23G5/14F23J15/06F23J15/04H01M10/54F23G2201/80F23G2201/60F23G2201/302F23G2201/303F23J2219/40Y02W30/84
Inventor 甄必波吴光辉谭文强刘方方
Owner HUNAN JIANG YE MECHANICAL & ELECTRICAL TECH CO LTD
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