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A kind of comprehensive recycling method of waste lithium-ion battery

A lithium-ion battery, waste technology, applied in the field of hydrometallurgy, can solve the problems of long process, high logistics and transportation cost and time cost, and achieve the effect of saving resources and maximizing economic benefits

Active Publication Date: 2022-07-26
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From mining to product production, the process is long, and the logistics transportation cost and time cost are relatively high

Method used

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  • A kind of comprehensive recycling method of waste lithium-ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A comprehensive recycling method for waste lithium-ion batteries, characterized in that the method comprises:

[0029] (1) The black powder (weight is 50g) is obtained by pre-processing the waste lithium-ion battery through discharge, heat treatment, crushing and sorting:

[0030] Acid leaching: the mass ratio of nitric acid to black powder is 1:1, and the mass ratio of sodium metabisulfite as reducing agent to black powder is 0.5:1 to carry out acid leaching, the reaction time is 4 hours, and the reaction temperature is 80°C ;

[0031] Removal of impurities: the oxidant used is air, the alkali used is magnesium oxide, the pH of the adjusted solution is 2.5, the control temperature is 25°C, and the reaction time is 4 hours;

[0032] Extraction: the extraction agent is P204, the ratio of the oil phase and water of the extraction is 1:1, and the back-extraction liquid and the raffinate are obtained through extraction, wherein the back-extraction liquid is a mixed nickel-...

Embodiment 2

[0036] Step (1) and step (2) are the same as in Example 1, wherein, in the acid leaching process, the acid adopts hydrochloric acid, and the ratio of the add-on to the black powder is 1.3:1, and the reducing agent is that the ratio of the add-on of sulfur dioxide and the black powder is: 1:1, the reaction time was 6 hours, and the temperature was 60°C; in the impurity removal process, the oxidant was hydrogen peroxide, the alkali was calcium carbonate, the temperature was 45°C, and the reaction time was 0.5 hour; the extraction agent was P507, and the oil-water ratio was 3 :1;

[0037] In step (3), the solution to be treated obtained in step (2) undergoes transformation, freezing, first concentrated crystallization, dissolution, and second concentrated crystallization to obtain battery-grade lithium hydroxide; wherein, transformation process: the added reagent is hydrogen Sodium oxide, added in [OH - ]: [Li 2 O] = 1:1 (Li 2 O is in the solution to be treated);

[0038] Fre...

Embodiment 3

[0040] A comprehensive recycling method for waste lithium-ion batteries, characterized in that the method comprises:

[0041] (1) The black powder (weight is 70g) is obtained by pre-processing the waste lithium-ion battery through discharge, heat treatment, crushing and sorting:

[0042] Acid leaching: the mixed acid of sulfuric acid and nitric acid is used, the mass ratio of the added amount to the black powder is 1.5:1, and the mass ratio of the added amount of hydrogen peroxide as a reducing agent to the black powder is 1.5:1 for acid leaching, and the reaction time is 10 hours. The reaction temperature is 100°C;

[0043] Impurity removal: the oxidant used is sulfur dioxide+air, ​​the alkali used is magnesium oxide, the pH of the adjusted solution is 4, the control temperature is 100°C, and the reaction time is 6 hours;

[0044] Extraction: the extraction agent is Cyanex272, the ratio of the oil phase and water of the extraction is 8:1, and the back-extraction liquid and t...

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Abstract

The invention discloses a comprehensive recycling method for waste lithium ion batteries. Using waste lithium ion batteries as raw materials, a process for jointly preparing battery-grade lithium carbonate and lithium hydroxide products is developed, and metals such as cobalt, nickel and manganese can be simultaneously recovered for preparing precursors. It can also recover and extract lithium elements to prepare battery-grade lithium carbonate and lithium hydroxide for positive manufacturing of positive electrode materials, which can not only recycle waste to protect the environment, but also maximize economic benefits and save resources.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a comprehensive recycling method for waste lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in many fields such as mobile phones, notebook computers, and new energy vehicles due to their high specific capacitance, excellent cyclability, and light weight and portability. With the explosive growth of new energy vehicles, the demand for lithium-ion batteries is also growing rapidly. At present, the first batch of new energy vehicle batteries have also begun to enter the retirement period one after another, and the number of scrapped lithium-ion batteries will increase with the increase of service life. It will cause great threat and pollution to the safety and environment of the place where it is placed. [0003] At present, the raw materials of battery-grade lithium carbonate and lithium hydroxide that can be purchased on the mark...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B26/12C22B47/00C22B3/38C22B23/00H01M10/54C01D15/02C01D15/08
CPCC22B7/007C22B26/12C22B47/00C22B23/0438C22B23/0423C22B23/043H01M10/54C01D15/02C01D15/08C22B3/3842C22B3/3846Y02W30/84
Inventor 李琴香许开华王文杰张坤王峻苏陶贵
Owner JINGMEN GEM NEW MATERIAL
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