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A physical separation and recovery method for positive and negative electrode materials of waste ternary lithium batteries

A technology of ternary lithium battery and positive and negative electrodes is applied in the field of physical sorting and recycling of positive and negative electrode materials of waste ternary lithium batteries, which can solve the problems of high cost of chemical separation and disposal, unrecovered graphite materials, etc., and achieve the elimination of adhesion. , Increase the difference of floatability and the effect of efficient separation

Active Publication Date: 2022-06-21
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a physical separation and recovery method for the positive and negative electrode materials of waste ternary lithium batteries, aiming at the high cost of chemical separation and disposal of the positive and negative electrode materials of the existing waste ternary lithium batteries, serious secondary pollution, The status quo of unrecycled graphite materials, realize clean and efficient separation of positive electrode powder and negative electrode powder in positive and negative electrode mixed powder

Method used

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  • A physical separation and recovery method for positive and negative electrode materials of waste ternary lithium batteries

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Effect test

Embodiment 1

[0027] The physical sorting and recycling method of the positive and negative electrode materials of the waste ternary lithium battery of the present embodiment, the process flow chart is shown in figure 1 shown. The positive and negative electrode materials of a ternary lithium battery in Foshan, Guangdong were sorted according to the following steps:

[0028] (1) Put the mixed powder of the positive and negative electrodes of the waste ternary lithium battery in a pyrolysis furnace, heat it for 2.0 h at a temperature of 350 °C and an inert atmosphere, and condense and collect the electrode powder after pyrolysis.

[0029] (2) The electrode powder after pyrolysis in step (1) is mixed with water to prepare a slurry with a mass percentage concentration of 68% and placed in a scrubbing machine, and the scrubbing time is 18 minutes.

[0030] (3) Introducing the scrubbed slurry in step (2) into the mixing tank, adding water to prepare a slurry with a mass percentage concentration...

Embodiment 2

[0034] The physical sorting and recycling method of the positive and negative electrode materials of the waste ternary lithium battery of the present embodiment, the process flow chart is shown in figure 1 shown. The positive and negative electrode materials of a ternary lithium battery in Shenzhen, Guangdong were sorted according to the following steps:

[0035] (1) Put the mixed powder of the positive and negative electrodes of the waste ternary lithium battery in a pyrolysis furnace, heat it for 1.5 hours at a temperature of 400 °C under an inert atmosphere, and condense and collect the electrode powder after pyrolysis.

[0036] (2) adding water to the pyrolyzed electrode powder to prepare a slurry with a mass percentage concentration of 70% and placing it in a scrubbing machine for a scrubbing time of 20 minutes.

[0037] (3) introducing the scrubbed slurry into the mixing tank, adding water to prepare a slurry with a mass percentage concentration of 10%, and adding sodiu...

Embodiment 3

[0041] The physical sorting and recycling method of the positive and negative electrode materials of the waste ternary lithium battery of the present embodiment, the process flow chart is shown in figure 1 shown. The positive and negative electrode materials of a ternary lithium battery in Jiangmen, Guangdong were sorted according to the following steps:

[0042] (1) Put the mixed powder of the positive and negative electrodes of the waste ternary lithium battery in a pyrolysis furnace, heat it for 2.0 h at a temperature of 450 ℃ and an inert atmosphere, and condense and collect the electrode powder after pyrolysis.

[0043] (2) adding water to the pyrolyzed electrode powder to prepare a slurry with a mass percentage concentration of 65% and placing it in a scrubbing machine, and the scrubbing time is 15 minutes.

[0044] (3) Introduce the scrubbed slurry into the mixing tank, add water to prepare a slurry with a mass percentage concentration of 15%, and add sodium carbonate ...

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Abstract

The invention relates to the technical field of recycling waste power lithium-ion batteries, and specifically discloses a method for physically sorting and recovering positive and negative electrode materials of waste ternary lithium batteries. The invention lays the foundation for clean and environmentally friendly physical separation by pyrolyzing the positive and negative electrode materials while removing organic matter, and eliminates the adhesion between the positive electrode material and the graphite by stirring and scrubbing, providing a solid foundation for subsequent flotation and The step-by-step recovery of graphite by magnetic separation creates favorable conditions. The method has the advantages of economy and environmental protection, simple operation and high product purity, realizes efficient separation of positive and negative electrode materials, and improves resource utilization.

Description

technical field [0001] The invention relates to the technical field of reuse of waste power lithium ion batteries, in particular to a physical sorting and recycling method for positive and negative electrode materials of waste ternary lithium batteries. Background technique [0002] In recent years, lithium-ion power batteries have been widely used in the field of new energy vehicles, and a large number of lithium-ion power batteries are about to enter the stage of end-of-life treatment. Waste lithium-ion batteries are both hazardous and resourceful, and the resulting problems of resource circulation and environmental pollution are becoming increasingly prominent. Recycling and harmless treatment of waste lithium batteries has become a research hotspot in the field of resources and environment. [0003] The recycling of waste power batteries requires dismantling, discharging, crushing, sieving, magnetic separation and other pretreatments to obtain plastic casings, diaphragm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 刘勇刘超甘涛刘牡丹周吉奎吕先谨吕建芳陈志强吕昊子胡红喜
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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