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Recovery treatment method for waste power battery powder

A technology for recycling and processing power batteries, which is applied in the field of recycling and processing waste power battery powder, can solve the problems of low lithium yield and high cost, and achieve the effects of high lithium leaching rate, low recycling cost, and easy acid leaching process

Pending Publication Date: 2021-02-19
湖南德景源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has the problems of low yield and high cost of lithium

Method used

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  • Recovery treatment method for waste power battery powder
  • Recovery treatment method for waste power battery powder
  • Recovery treatment method for waste power battery powder

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The recycling method of waste power battery powder, the process is as follows figure 1 shown, including the following steps:

[0047] S1: reducing and roasting the waste power battery powder to obtain reduced and roasted battery powder;

[0048] S2: Dissolving and filtering the battery powder treated in step S1 to obtain a filtrate and a filter residue, passing carbon dioxide into the filtrate, separating the formed precipitate from solid and liquid, and drying to obtain lithium carbonate;

[0049]S3: adding sulfuric acid to the filter residue in step S2, and leaching to obtain a solution containing nickel, cobalt and manganese;

[0050] S4: Extract the solution containing nickel, cobalt and manganese obtained in step S3 with P204 to obtain a sodium-containing stripping solution, a manganese-containing stripping solution, a zinc-aluminum-containing stripping solution, and a cobalt-containing magnesium-nickel stripping solution;

[0051] S5: Extract the manganese-conta...

Embodiment 2

[0058] This example adopts the method of embodiment 1 to the waste power battery powder, and the subdivision particle size 180 order passing rate is greater than 95%, the waste and old ternary power battery of dismantling, as the nickel-containing, the nickel that the battery of electric vehicle, the battery of electric tool etc. are produced Both cobalt and manganese waste power battery powder can be recycled by this method, the process is as follows figure 1 As shown, the specific situation is

[0059] 1. Production of lithium carbonate

[0060] The reduced battery powder is leached, and the Li in the leaching solution reaches about 20-30g / L. It can be cyclically leached, and the concentration of the leachate can be increased to Li: 50g / L. After the solution is purified, lithium carbonate is synthesized, and solid lithium carbonate is obtained after solid-liquid separation of lithium carbonate. Lithium carbonate is obtained through drying, metering and packaging. The quali...

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Abstract

The invention provides a recovery treatment method for waste power battery powder. According to the treatment method, a dynamic reduction roasting process is adopted for reduction roasting treatment,so that the battery powder is treated more thoroughly, the recovery rate of lithium is increased by about 10%, reduced nickel, cobalt and manganese all are changed from a high valence state to a low valence state more thoroughly, a reducing agent is not consumed basically in the subsequent leaching process, and during nickel recovery, recovery in an extraction mode is not needed. In addition, according to the recovery treatment method, the dynamic reduction process is taken as a starting point, so that lithium recovery is economical and efficient; and the influence on nickel recovery is considered in the cobalt and manganese recovery process, and nickel saponification is adopted, so that the nickel recovery cost is low.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a method for recycling waste power battery powder. Background technique [0002] With the promotion and use of new energy vehicles, more and more power batteries of new energy vehicles are scrapped. The disassembled power battery powder contains a large amount of valuable metals such as nickel, cobalt, manganese, lithium, copper, etc. How to recycle these metals with high yield and low cost is a key link in the circular chain of the new energy industry. Currently, the main recycling methods include: [0003] Recover nickel, cobalt and manganese first, and then recover lithium. Specifically, the battery powder is reduced and dissolved to remove nickel, cobalt, manganese, and lithium solution. First, the iron in the solution is removed by chemical methods, and then nickel, cobalt, and manganese are recovered by extraction, and lithium is recovered from the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B19/20C22B19/30C22B21/00C22B26/12C22B47/00H01M10/54
CPCC22B7/006C22B7/007C22B26/12C22B23/043C22B47/00C22B19/30C22B19/20C22B21/0023H01M10/54Y02W30/84Y02P10/20
Inventor 李军秀杜长福朱文兵黄孝伟
Owner 湖南德景源科技有限公司
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