Title:
METHOD FOR RECOVERING VALUABLE METAL
Document Type and Number:
WIPO Patent Application WO/2024/048249
Kind Code:
A1
Abstract:
To provide a method whereby a valuable metal can be efficiently recovered from a waste lithium-ion battery, the present invention is a method for recovering a valuable metal from a waste lithium-ion battery, and comprises an oxidation roasting step S3 for performing oxidation roasting treatment of a raw material that includes a waste lithium-ion battery, and a reduction step S4 for reducing a resultant oxidation roasted product in the presence of carbon. The present invention is characterized in that dust in an exhaust gas that is generated in the oxidation roasting step S3 is subjected to heat treatment at no less than 600°C but less than 1000°C to perform recovery, and at least a portion of the recovered heat-treated dust is added to material to be treated in the reduction step S4. The temperature of heat treatment of the dust is preferably no less than 900°C but less than 1000°C.
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Inventors:
NAGAKURA TOSHIHIKO (JP)
Application Number:
PCT/JP2023/029293
Publication Date:
March 07, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B7/02; C22B1/00; C22B1/02; C22B5/10; C22B7/00; H01M10/54
Foreign References:
| JP2021161455A | 2021-10-11 | |||
| JP2021161454A | 2021-10-11 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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