METHOD FOR RECYCLING SPENT LITHIUM-ION BATTERIES - GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD

Title:

METHOD FOR RECYCLING SPENT LITHIUM-ION BATTERIES

Document Type and Number:

WIPO Patent Application WO/2023/010969

Kind Code:

A1

Abstract:

Disclosed in the present invention is a method for recycling spent lithium-ion batteries, which method relates to the technical field of the recovery or processing of waste materials. The method for recycling spent lithium-ion batteries of the present invention comprises the following steps: (1) drying spent lithium-ion batteries; (2) crushing and sieving same to obtain the oversize and the undersize; (3) mixing and roasting the oversize and sodium hydroxide; (4) mixing the roasted oversize with water, and carrying out pulping and wet magnetic separation to obtain iron slag and a non-magnetic slurry; (5) subjecting the non-magnetic slurry to solid-liquid separation to obtain a non-magnetic material and a circulating fluid; and (6) immersing the non-magnetic material into an ammonium sulfate solution and reacting same for a period of time to obtain copper slag. By means of recycling spent lithium-ion batteries via the method in the present invention, high-purity iron slag and copper slag can be obtained.

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Inventors:

TANG HONGHUI (CN)
JIANG KUAILIANG (CN)

Application Number:

PCT/CN2022/095679

Publication Date:

February 09, 2023

Filing Date:

May 27, 2022

Export Citation:

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Assignee:

GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)

International Classes:

C01B32/05; C01B17/02; C22B1/02; C22B7/00; C22B15/00; C22B23/00; C22B47/00; H01M10/0525; H01M10/54

Foreign References:

CN113801990A	2021-12-17
CN102534223A	2012-07-04
CN112813253A	2021-05-18
CN112186287A	2021-01-05
CN106299523A	2017-01-04
JP2019135321A	2019-08-15
JP2016113672A	2016-06-23
KR20110056033A	2011-05-26
JPWO2012169073A1	2015-02-23

Attorney, Agent or Firm:

JIAQUAN IP LAW (CN)

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