Title:
METHOD FOR RECYCLING VALUABLE METAL IN LITHIUM BATTERY POSITIVE PLATE
Document Type and Number:
WIPO Patent Application WO/2023/093182
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for recycling valuable metal in a lithium battery positive plate, comprising the following steps: S1, mixing a positive plate material with reducing metal, and then roasting, the roasting being carried out in a protective atmosphere; S2, performing magnetic separation on the material obtained in step S1 to obtain a magnetic component and a non-magnetic component; S3, performing acid dissolution on the magnetic component, concentrating the obtained leaching solution, and then performing cooling crystallization to obtain a metal salt A; and S4, performing water soaking on the non-magnetic component to obtain sediment and water soaking liquid, adding carbonate into the water soaking liquid to obtain lithium carbonate, performing acid dissolution on the sediment, purifying, and performing evaporative crystallization to obtain a dissolved solution to obtain a metal salt B. According to the recycling method of the present invention, the purpose of omitting extraction and accessory steps thereof can be achieved by means of simple impurity removal and separation processes, the technological process is simplified, and the investment cost is reduced.
Inventors:
OUYANG SHIBAO (CN)
LI CHANGDONG (CN)
CHEN RUOKUI (CN)
FU XIONGCONG (CN)
RUAN DINGSHAN (CN)
CAI YONG (CN)
LI CHANGDONG (CN)
CHEN RUOKUI (CN)
FU XIONGCONG (CN)
RUAN DINGSHAN (CN)
CAI YONG (CN)
Application Number:
PCT/CN2022/115955
Publication Date:
June 01, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
C22B7/00; C01D15/08; C22B1/02; C22B23/00; C22B26/12; C22B47/00; C25C3/06; C30B7/14; C30B28/04; C30B29/46; H01M10/54
Foreign References:
| CN114231745A | 2022-03-25 | |||
| CN111118294A | 2020-05-08 | |||
| CN111206151A | 2020-05-29 | |||
| CN112573586A | 2021-03-30 | |||
| CN111945006A | 2020-11-17 | |||
| JPH1046266A | 1998-02-17 | |||
| CN112661201A | 2021-04-16 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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