Composite regulator for flotation of graphite in waste lithium ion battery and recovery method of graphite in waste lithium ion battery

A compound regulator and lithium-ion battery technology, which is applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of low carbon grade and high impurities, and achieve the effect of improving grade

Active Publication Date: 2020-08-04
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The main purpose of the present invention is to provide a composite regulator for graphite flotation in waste lithium-ion batteries and a recovery method for graphite in waste

Method used

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  • Composite regulator for flotation of graphite in waste lithium ion battery and recovery method of graphite in waste lithium ion battery

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Effect test

Embodiment 1

[0041] Taking the waste lithium-ion battery of an enterprise in Shaanxi as the implementation object, it was crushed to less than 30mm after discharge, and then roasted at 600°C for 2 hours in a nitrogen protective atmosphere. After the pyrolysis material is cleaned, it is classified into two particle sizes of >0.15mm and <0.15mm. The <0.15mm particle size product is magnetically separated to remove impurities under a magnetic field strength of 240kA / m, and the magnetic separation tailings enter the flotation process. Adjust the magnetic separation tailings with water to a concentration of 20% pulp, and then add a composite regulator (being a mixture of sodium thioglycolate and water glass, the weight ratio of which is water glass: sodium thioglycolate = 1: 9), after stirring for 3 minutes, add kerosene at 180g / t, and finally add terpineol oil at 100g / t, stir for 2 minutes after the addition, the pH of the pulp reaches 7, and carry out graphite flotation for 6 minutes. Under t...

Embodiment 2

[0043] Taking the waste lithium-ion battery of an enterprise in Shaanxi as the implementation object, it was crushed to less than 30mm after discharge, and then roasted at 600°C for 2 hours in a nitrogen protective atmosphere. After the pyrolysis material is cleaned, it is classified into two particle sizes of >0.15mm and <0.15mm. The <0.15mm particle size product is magnetically separated to remove impurities under a magnetic field strength of 240kA / m, and the magnetic separation tailings enter the flotation process. Adjust the magnetic separation tailings with water to a concentration of 20% pulp, and then add a composite regulator (being a mixture of sodium thioglycolate and water glass, the weight ratio of which is water glass: sodium thioglycolate = 1: 20), after stirring for 3 minutes, add kerosene at 180g / t, and finally add terpineol oil at 100g / t, stir for 3 minutes after the addition, the pH of the pulp reaches 7, and carry out graphite flotation for 6 minutes. Under ...

Embodiment 3

[0045] Taking the waste lithium-ion battery of an enterprise in Shaanxi as the implementation object, it was crushed to less than 30mm after discharge, and then roasted at 600°C for 2 hours in a nitrogen protective atmosphere. After the pyrolysis material is cleaned, it is classified into two particle sizes of >0.15mm and <0.15mm. The <0.15mm particle size product is magnetically separated to remove impurities under a magnetic field strength of 240kA / m, and the magnetic separation tailings enter the flotation process. Adjust the magnetic separation tailings with water to a concentration of 20% pulp, and then add a composite regulator (being a mixture of sodium thioglycolate and water glass, the weight ratio of which is water glass: sodium thioglycolate = 1: 0.1), after stirring for 3 minutes, add kerosene at 180g / t, and finally add terpineol oil at 100g / t, stir for 3 minutes after the addition, the pH of the pulp reaches 7, and carry out graphite flotation for 6 minutes. Under...

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Abstract

The invention provides a composite regulator for flotation of graphite in a waste lithium ion battery and a recovery method of the graphite in the waste lithium ion battery. The composite regulator comprises a sulfhydryl compound and water glass. The composite regulator is added in the graphite flotation process, and copper and nickel-cobalt-manganese entering flotation concentrate can be reduced,so that the content of the copper and the nickel-cobalt-manganese in the graphite is reduced, and the grade of carbon in the graphite is improved. Valuable components such as the copper, the nickel-cobalt-manganese and the like in flotation tailings are enriched and can be used as raw materials for recovering the valuable components through wet metallurgy or pyrometallurgy.

Description

technical field [0001] The invention relates to the technical field of resource recovery of waste lithium ion batteries, in particular to a composite regulator for graphite flotation in waste lithium ion batteries and a recovery method for graphite in waste lithium ion batteries. Background technique [0002] Most of the negative electrode materials in waste lithium-ion batteries use graphite materials as the negative electrode. After a long-term charge-discharge cycle of lithium-ion secondary batteries, the graphite structure of the negative electrode has almost no change, but other substances in the battery will remain in the graphite, which is leading to battery performance. A very important reason for the decline. Therefore, the negative electrode graphite material in the scrap lithium-ion battery is recycled, removed, and recycled repeatedly, thereby avoiding the waste of resources. Some harmful substances such as hydrofluoric acid remain in the negative electrode mate...

Claims

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Application Information

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IPC IPC(8): C01B32/215H01M10/54
CPCC01B32/215H01M10/54Y02W30/84
Inventor 王传龙于传兵宋磊刘志国康金星
Owner CHINA ENFI ENGINEERING CORPORATION
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