A recovery and regeneration process for a waste battery graphite material

A technology for graphite materials and waste batteries, which is applied in the field of recycling and regeneration of graphite materials for waste batteries, can solve problems such as resource waste, impact, environment and even human health problems, achieve high recovery rate, improve purity and production efficiency, and reduce impurities The effect of content

Inactive Publication Date: 2018-05-15
SHENZHEN ANDING NEW ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If waste batteries cannot be effectively recycled, it will have a negative impact on the environment and even human health, and it will also lead to a waste of resources and affect the sustainable development of the social economy.

Method used

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  • A recovery and regeneration process for a waste battery graphite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the negative electrode sheet containing graphite material in the waste battery is put into a rod mill for wet grinding to separate the copper foil as a current collector from the negative electrode powder adhering to the surface of the copper foil, and during the wet grinding process The solid content is controlled at 15 wt% by adding water, and the wet milling is completed after 10 minutes, and the mixed liquid containing the copper foil and the negative electrode powder is transferred to a high turbulence mixing equipment for stirring and mixing.

[0037] During the pulping process, the solid content is controlled at 5wt% by adding water, and sodium silicate as a dispersant, kerosene as a collector and terpineol oil as a foaming agent are added, and sodium silicate, kerosene and pine The amount of alcohol oil added relative to the total mass of the copper foil and the negative electrode powder is 100 g / t, 100 g / t, and 100 g / t, respectively.

[0038...

Embodiment 2

[0042] In this embodiment, the negative electrode sheet containing graphite material in the waste battery is put into a rod mill for wet grinding to separate the copper foil as a current collector from the negative electrode powder adhering to the surface of the copper foil, and during the wet grinding process The solid content is controlled at 25wt% by adding water, and the wet grinding is completed after 20 minutes, and the mixed liquid containing the copper foil and the negative electrode powder is transferred to a high turbulence mixing equipment for stirring and mixing.

[0043] During the pulping process, the solid content is controlled at 8wt% by adding water, and sodium hexametaphosphate as a dispersant, kerosene as a collector and pine oil as a foaming agent are added, and sodium hexametaphosphate, kerosene And the addition amount of terpineol oil relative to the total mass of the copper foil and the negative electrode powder is 150g / t, 200g / t, 150g / t respectively.

...

Embodiment 3

[0048] In this embodiment, the negative electrode sheet containing graphite material in the waste battery is put into a rod mill for wet grinding to separate the copper foil as a current collector from the negative electrode powder adhering to the surface of the copper foil, and during the wet grinding process The solid content is controlled at 30wt% by adding water, and the wet grinding is completed after 30 minutes, and the mixed liquid containing the copper foil and the negative electrode powder is transferred to a high-turbulence mixing equipment for stirring and mixing.

[0049] During the pulping process, the solid content is controlled at 10wt% by adding water, and sodium silicate as a dispersant, kerosene as a collector and pine alcohol oil as a foaming agent are added, and sodium silicate, kerosene and pine The amount of alcohol oil added relative to the total mass of the copper foil and the negative electrode powder is 200g / t, 400g / t, and 200g / t, respectively.

[005...

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Abstract

A recovery and regeneration process for a waste battery graphite material is disclosed. The process includes 1) subjecting negative electrode plates containing a graphite material in waste batteries to wet grinding to separate copper foil adopted as current collectors from negative electrode powder adhered to the copper foil; 2) after wet grinding is finished, performing stirring and pulp adjusting, adding a certain amount of a dispersant, a collecting agent and a foaming agent to float the graphite material; 3) after pulp adjusting is finished, performing floatation, and separating graphite concrete floating along with foams from copper foil tailings; 4) transferring the graphite concrete into a solution containing an oxidant and an inorganic acid to remove metal impurities, and then performing filtration and drying to obtain graphite filter cake; 5) subjecting the graphite filter cake to thermal treatment to oxidize surfaces and to remove residual organic matters, and cooling a product to obtain high-purity graphite; 6) dispersing the high-purity graphite into a phenolic resin solution, and performing suction filtration and drying to obtain phenolic resin covered graphite; and 7)subjecting the phenolic resin covered graphite to high-temperature thermal treatment, and cooling the product to obtain regenerated graphite.

Description

【Technical field】 [0001] The invention belongs to the technical field of battery recycling, and in particular relates to a recycling process for graphite materials of waste batteries. 【Background technique】 [0002] In recent years, electric vehicles have developed rapidly. China has become the largest country in the promotion of electric vehicles. In 2016, the sales volume of electric vehicles in my country was 507,000. By 2020, the sales of electric vehicles will reach 2 million. reached 5 million vehicles. With the development of electric vehicles, a problem that cannot be ignored has attracted more and more attention-some power batteries have begun to enter the scrapping period. Some studies predict that by 2020, the amount of scrapped power batteries will reach 32.2Gwh, about 500,000 tons. If waste batteries cannot be effectively recycled, it will have adverse effects on the environment and even human health, and it will also lead to waste of resources and affect the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C01B32/215
CPCY02W30/84H01M10/54
Inventor 边颖邓昌源许辉
Owner SHENZHEN ANDING NEW ENERGY TECH DEV CO LTD
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