Title:
VALUABLE METAL RECOVERY METHOD AND RECOVERY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/168805
Kind Code:
A1
Abstract:
The present invention has: a heating step (S3) for heating a battery slag (M1) having a positive-electrode active material that includes one or both of Ni and Co and a negative-electrode active material that includes graphite, and thereby oxidizing the graphite included in the negative-electrode active material in the battery slag (M1) to generate carbon dioxide gas (G); and an acid leaching step (S4) for adding sulfuric acid to a residual powder (M2) that remains after generation of carbon dioxide gas (G) from the battery slag (M1), and thereby leaching one or both of the Ni and Co included in the positive-electrode active material in the residual powder (M2) into the sulfuric acid to generate a leachate (E1).
Inventors:
MURAOKA HIROKI (JP)
Application Number:
PCT/JP2022/003697
Publication Date:
August 11, 2022
Filing Date:
January 31, 2022
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
C22B1/00; C22B1/02; C22B3/08; C22B3/44; C22B7/00; C22B23/00
Domestic Patent References:
| WO2020109045A1 | 2020-06-04 | |||
| WO2019197192A1 | 2019-10-17 |
Foreign References:
| JP2019169309A | 2019-10-03 | |||
| JP2020535323A | 2020-12-03 | |||
| JP2013112538A | 2013-06-10 | |||
| JP2012036420A | 2012-02-23 | |||
| JPH0681050A | 1994-03-22 | |||
| JP2013095988A | 2013-05-20 | |||
| JPH07252548A | 1995-10-03 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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