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Physical sorting and recycling method for positive and negative electrode materials of waste ternary lithium battery

A technology for ternary lithium batteries and positive and negative electrodes, which is applied in the field of physical separation and recovery of positive and negative electrode materials of waste ternary lithium batteries, can solve the problems of unrecovered graphite materials and high cost of chemical separation and disposal, and achieve increased floatability Sexual difference, elimination of adhesion, and high-efficiency separation

Active Publication Date: 2021-04-30
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Physical sorting and recycling method for positive and negative electrode materials of waste ternary lithium battery

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Experimental program
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Effect test

Embodiment 1

[0027] The physical separation and recovery method of positive and negative electrode materials of waste ternary lithium batteries in this 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 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. under an inert atmosphere, and condense and collect the pyrolyzed electrode powder.

[0029] (2) Add water to the pyrolyzed electrode powder in step (1) to form a slurry with a concentration of 68% by mass and place it in a scrubbing machine for 18 minutes.

[0030] (3) Introduce the slurry after scrubbing in the step (2) into the mixing tank, add water and adjust it into a slurry with a mass percentage concentration of 12%, add water glass regulator, sodium hexame...

Embodiment 2

[0034] The physical separation and recovery method of positive and negative electrode materials of waste ternary lithium batteries in this 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 positive and negative electrode powders of waste ternary lithium batteries in a pyrolysis furnace, heat them for 1.5 hours at a temperature of 400° C. under an inert atmosphere, and condense and collect them to obtain pyrolyzed electrode powders.

[0036] (2) Add water to the pyrolyzed electrode powder to form a slurry with a concentration of 70% by mass and place it in a scrubbing machine for 20 minutes.

[0037] (3) The slurry after scrubbing is introduced in the mixing tank, and water is added to be formulated into a slurry with a mass percentage concentration of 10%, and sodium carbonate regulator, sodium ...

Embodiment 3

[0041] The physical separation and recovery method of positive and negative electrode materials of waste ternary lithium batteries in this 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 positive and negative electrode mixed powder of the waste ternary lithium battery in a pyrolysis furnace, heat for 2.0 h at a temperature of 450° C. under an inert atmosphere, and condense and collect the pyrolyzed electrode powder.

[0043] (2) Add water to the pyrolyzed electrode powder to form a slurry with a concentration of 65% by mass and place it in a scrubbing machine for 15 minutes.

[0044] (3) Introduce the slurry after scrubbing in the mixing tank, add water and adjust it into a slurry with a mass percentage concentration of 15%, add sodium carbonate and water glass mixing regulator, sodium hexametaphosp...

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Abstract

The invention relates to the technical field of recycling of waste power lithium ion batteries, and particularly discloses a physical sorting and recycling method of positive and negative electrode materials of a waste ternary lithium battery. Herein, the positive electrode material and the negative electrode material are pyrolyzed, wherein a foundation is laid for clean and environment-friendly physical separation while organic matter is removed; the adhesion effect between the positive electrode material and graphite is eliminated through stirring and scrubbing, and beneficial conditions are created for step-by-step recovery of the graphite through subsequent flotation and magnetic separation. The method has the advantages of economy, environmental protection, simple operation, high product purity and the like, realizes efficient separation of positive and negative electrode materials, and improves the utilization rate of resources.

Description

technical field [0001] The invention relates to the technical field of reuse of waste power lithium-ion batteries, in particular to a physical separation and recovery 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 scrapping. Waste lithium-ion batteries are both hazardous and resource-intensive, and the problems of resource recycling and environmental pollution have become increasingly prominent. The 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 pretreatment such as dismantling, discharging, crushing, screening, and magnetic separation to obtain plastic shells, diaphragms, copper ...

Claims

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Application Information

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Patent Type & Authority Applications(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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