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Method for removing zirconium from zirconium-doped ternary precursor waste dissolving solution

A precursor and solution technology, applied in the field of zirconium-doped ternary precursor waste solution for zirconium removal, can solve the problems of inability to obtain a ternary solution, unfavorable environmental protection, large loss of nickel, etc., and achieve high purity and low cost. , the effect of reducing the loss of nickel

Active Publication Date: 2021-03-02
贵州中伟资源循环产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the zirconium-doped ternary precursor waste with low aluminum and iron content, the existing method cannot completely separate it by means of pressure filtration, and thus cannot obtain a qualified ternary solution.
[0004]In the prior art, the removal of zirconium is often accompanied by a large amount of nickel, which leads to excessive loss of nickel, resulting in great waste and is not conducive to the environment Protect

Method used

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  • Method for removing zirconium from zirconium-doped ternary precursor waste dissolving solution
  • Method for removing zirconium from zirconium-doped ternary precursor waste dissolving solution
  • Method for removing zirconium from zirconium-doped ternary precursor waste dissolving solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A batch of zirconium-doped ternary precursor waste was slurried with water, and the chemical composition of the solution obtained by adding sulfuric acid and hydrogen peroxide reduction leaching and filtering was shown in Table 1:

[0056] Table 1 Chemical composition list of zirconium-doped ternary precursor waste solution solution

[0057]

[0058] The temperature of the solution was raised to 90°C, the pH of the solution was adjusted to 6.5 with sodium hydroxide solution, stirred and reacted for 1.5 hours and filtered. The test results of the filtrate are shown in Table 2:

[0059] Table 2 Chemical composition list of liquid after zirconium removal

[0060]

[0061] It can be seen from Table 2 that after treatment, the zirconium content decreased from 336.5mg / L to 0.87mg / L, and the zirconium removal rate was 99.74%.

[0062] The obtained zirconium-nickel slag is mixed with crude nickel sulfate, leached and purified with sulfuric acid, and the nickel in the zir...

Embodiment 2

[0064] The zirconium-doped ternary precursor waste solution used in this example is the same as that in Example 1.

[0065] Heat the solution to 60°C, adjust the pH of the solution to 7 with sodium hydroxide solution, stir and react for 0.5h and filter. The test results of the filtrate are shown in Table 3:

[0066] Table 3 Chemical composition list of liquid after zirconium removal

[0067]

[0068]

[0069] It can be seen from Table 3 that after treatment, the zirconium content decreased from 336.5mg / L to 0.37mg / L, and the zirconium removal rate was 99.89%.

[0070] The obtained zirconium-nickel slag is mixed with crude cobalt hydroxide, leached and purified with sulfuric acid, and the nickel in the zirconium-nickel slag is recovered.

Embodiment 3

[0072] The zirconium-doped ternary precursor waste solution used in this example is the same as that in Example 1.

[0073] Heat the solution to 75°C, adjust the pH of the solution to 6 with sodium hydroxide solution, stir and react for 3 hours and filter. The test results of the filtrate are shown in Table 4:

[0074] Table 4 Chemical composition list of liquid after zirconium removal

[0075]

[0076] It can be seen from Table 4 that after treatment, the zirconium content decreased from 336.5mg / L to 1.12mg / L, and the zirconium removal rate was 99.67%.

[0077] The obtained zirconium-nickel slag is mixed with ternary waste, and then leached and purified with sulfuric acid to recover nickel in the zirconium-nickel slag.

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Abstract

The invention provides a method for removing zirconium from a zirconium-doped ternary precursor waste dissolving solution, and relates to the field of lithium ion batteries. The method for removing zirconium from the zirconium-doped ternary precursor waste dissolving solution comprises the following steps: mixing raw materials including an alkaline substance and the zirconium-doped ternary precursor waste dissolving solution to obtain a mixed solution, carrying out a first reaction, and carrying out post-treatment to obtain a ternary solution and zirconium-containing slag; wherein raw materials of the zirconium-doped ternary precursor waste dissolving solution comprise zirconium-doped ternary precursor waste, the content of an iron element and the content of an aluminum element in the zirconium-doped ternary precursor waste are smaller than or equal to 0.03 wt%, and the pH of the mixed solution is 2.5-7. According to the method for removing zirconium from the zirconium-doped ternary precursor waste dissolving solution, zirconium in the ternary precursor waste can be effectively removed, meanwhile, nickel loss is reduced, and the recycling cost is reduced.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for removing zirconium from a zirconium-doped ternary precursor waste solution. Background technique [0002] Ternary nickel, cobalt, and manganese precursors are the positive electrode materials of ternary batteries. With the rapid development of the lithium battery industry, the demand for high-purity nickel-cobalt-manganese precursors is increasing. The ternary precursor doped with zirconium is a very common precursor in the preparation process of lithium-ion batteries. The waste generated due to pollution or unqualified physical indicators such as appearance and electrical properties needs to be recycled to reduce production costs and reduce environmental pollution. [0003] For zirconium-doped ternary precursor waste with high content of elements such as aluminum and iron, the removal of zirconium is relatively easy, because zirconium can be removed during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
CPCC01G53/44C01P2006/80Y02P10/20Y02W30/84
Inventor 王博宇刘增威王文平张大伟
Owner 贵州中伟资源循环产业发展有限公司
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