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Waste lithium battery resource recycling method and application of product

A waste lithium battery and recycling method technology, applied in the field of electronic waste recycling, can solve the problems of easily destroying the physical structure of active substances, a large amount of waste gas, secondary pollution, etc., to achieve environmental friendliness, less three waste emissions, and improve recovery rate Effect

Inactive Publication Date: 2015-03-11
四川长虹格润环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly uses strong acid, which is easy to cause secondary pollution
The fire method needs to roast the lithium battery and then sieve it, which not only produces a lot of exhaust gas but also easily destroys the physical structure of the active material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Recycling methods of waste lithium batteries:

[0026] Step 1: Soak the waste lithium battery in a NaCl solution with a mass fraction of 4% to 6%, and discharge it for 12 hours to avoid safety accidents caused by short circuit sparks when broken;

[0027] Step 2: Wet crush the discharged waste lithium battery until the particle size is ≤12mm;

[0028] Step 3: Send the crushed waste lithium battery into the crushing tank, mix it with water, stir to obtain the mixture, extract the suspension in the mixture and filter to obtain the mixture of lithium cobaltate, carbon powder and clarified liquid, and return the clarified liquid to the tank Internal recycling, the recovery rate of lithium cobaltate and carbon powder in this step is about 50%;

[0029] Step 4: Transport the mixture after the suspension is extracted to the next tank through a screw conveyor, add 4% to 5% sodium hydroxide solution to dissolve aluminum for 1.5h to 2h, then separate the alkali washing liquid an...

Embodiment 2

[0032] Recycling methods of waste lithium batteries:

[0033] Step 1: Soak the waste lithium battery in a NaCl solution with a mass fraction of 4% to 6%, and discharge it for 12 hours to avoid safety accidents caused by short circuit sparks when broken;

[0034] Step 2: Wet crush the discharged waste lithium battery until the particle size is ≤12mm;

[0035] Step 3: Send the crushed waste lithium battery into the crushing tank, mix it with water, stir to obtain the mixture, extract the suspension in the mixture and filter to obtain the mixture of lithium cobaltate, carbon powder and clarified liquid, and return the clarified liquid to the tank Internal recycling, the recovery rate of lithium cobaltate and carbon powder in this step is about 50%;

[0036] Step 4: Transport the mixture after the suspension is extracted to the next tank through a screw conveyor, and wash it with water until no lithium cobaltate and carbon powder are produced, and separate and recover the floatin...

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PUM

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Abstract

The invention belongs to the field of recycling treatment of electronic wastes, particularly relates to a waste lithium battery resource recycling method and application of a product, and aims to provide an environment-friendly waste lithium battery resource recycling method. The waste lithium battery resource recycling method comprises the steps: crushing a discharged waste lithium battery; mixing the crushed waste lithium battery with water, stirring to enable lithium cobaltate and carbon powder to fall off, enable metal slag to sink down and enable plastic to float up, and separating to obtain suspension, the metal slag and the plastic; filtering the suspension to obtain a mixture of lithium cobaltate and the carbon powder; washing the metal slag and the plastic by water until lithium cobaltate and the carbon powder are washed out, separating to obtain washing liquor, and filtering the washing liquor to obtain the mixture of lithium cobaltate and the carbon powder. The waste lithium battery resource recycling method is simple; a high-temperature or strong-acid environment is not needed; the method is environment-friendly; furthermore, the recycling rate of lithium cobaltate and the recycling rate of the carbon powder are up to 90 percent.

Description

technical field [0001] The invention belongs to the field of recycling electronic waste, and in particular relates to a recycling method and product application of waste lithium batteries. Background technique [0002] Lithium batteries are widely used in daily life due to their advantages of high energy density, large working voltage, no memory effect and long cycle life, such as cameras, mobile phones, notebook computers and portable measuring instruments and other electronic products. The preferred light and high-energy power source for electric vehicles. However, after lithium batteries are scrapped, they often bring certain harm to the environment and human health. At the same time, the lithium and cobalt contained in waste lithium batteries are strategic resources with high value. Therefore, no matter from the perspective of environmental protection or economics, waste lithium batteries should be recycled as resources. [0003] It has been determined that the content...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 王炼江先洪张国强郅慧
Owner 四川长虹格润环保科技股份有限公司
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