Title:
RECOVERY METHOD AND RECOVERY APPARATUS FOR VALUABLE METAL
Document Type and Number:
Japanese Patent JP2022118594
Kind Code:
A
Abstract:
To recover Ni or/and Co contained in battery slag by efficiently leaching it into sulfuric acid.SOLUTION: A recovery method includes a heating step S3 for heating battery slag M1 having a cathode active material containing Ni or/and Co and an anode active material containing graphite to oxidize the graphite contained in the anode active material in the battery slag M1 and thus to generate carbon dioxide G, an acid leaching step S4 for adding sulfuric acid to residual powder M2 remaining after generating carbon dioxide G from the battery slag M1 to leach Ni or/and Co contained in the cathode active material in the residual powder M2 into the sulfuric acid and thus to produce a leachate E1, and recovery steps S5-S15 for recovering the Ni or/and Co contained in the leachate E1.SELECTED DRAWING: Figure 1
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Inventors:
MURAOKA HIROKI
Application Number:
JP2021015218A
Publication Date:
August 15, 2022
Filing Date:
February 02, 2021
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C22B23/00; C22B1/00; C22B1/02; C22B3/08; C22B3/44; C22B7/00
Attorney, Agent or Firm:
Naruse Shigeo
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