Title:
PROCESS FOR SELECTIVELY RECOVERING CURRENT COLLECTORS FROM SPENT LITHIUM-ION BATTERIES AND APPLICATION
Document Type and Number:
WIPO Patent Application WO/2022/161086
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of the recycling of spent lithium-ion batteries, and provided is a process for selectively recovering current collectors from spent lithium-ion batteries, the process comprising the following steps: (1) discharging, drying, and incinerating the spent lithium-ion batteries, and then performing crushing, screening, and ball-milling to obtain a ball-milled material; (2) carrying out water washing and magnetic separation on the ball-milled material to obtain a low-magnetism current collector copper-aluminum mixture; and (3) pulping the low-magnetism current collector copper-aluminum mixture, and performing a shaking table treatment to obtain current collector copper and current collector aluminum, respectively. In the present invention, by ingeniously using the fact that the metals nickel, cobalt, and manganese have magnetic properties and copper and aluminum are non-magnetic, and the principle of the specific gravity of copper being significantly higher than that of aluminum, and by means of processes, such as a heat treatment, ball milling, hydraulic separation, a cyclone, magnetic separation, and a shaking table treatment, for the separation of copper and aluminum without new impurity ions being introduced throughout the separation process, the subsequent impurity removal process is greatly simplified, the purity of both the copper and aluminum current collectors are improved, and the sales value of the current collectors are improved.
Inventors:
FANG BOLIN (CN)
CHEN RUOKUI (CN)
TANG HONGHUI (CN)
GONG QINXUE (CN)
LIU WEI (CN)
LI QIANG (CN)
LI CHANGDONG (CN)
CHEN RUOKUI (CN)
TANG HONGHUI (CN)
GONG QINXUE (CN)
LIU WEI (CN)
LI QIANG (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2021/142347
Publication Date:
August 04, 2022
Filing Date:
December 29, 2021
Export Citation:
Assignee:
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
C22B21/00; C22B7/00; C22B15/00; H01M10/54
Foreign References:
CN112961984A | 2021-06-15 | |||
CN105671316A | 2016-06-15 | |||
CN111468284A | 2020-07-31 | |||
CN102534223A | 2012-07-04 | |||
CN108428958A | 2018-08-21 | |||
CN105355997A | 2016-02-24 | |||
JP2020064855A | 2020-04-23 | |||
KR20120126946A | 2012-11-21 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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