Title:
METHOD FOR PRODUCING VALUABLE METAL
Document Type and Number:
WIPO Patent Application WO/2023/032495
Kind Code:
A1
Abstract:
The present invention provides a method for producing a valuable metal at a low cost. A method according to the present invention comprises at least: a preparation step in which a starting material that contains Li, Mn, Al and a valuable metal is prepared; a reduction melting step in which the starting material is subjected to a reduction melting process so as to obtain a reduced product that contains slag and an alloy containing the valuable metal; and a slag separation step in which the slag is separated from the reduced product, thereby recovering the alloy. In one or both of the preparation step and the reduction melting step, a flux that contains calcium (Ca) is added; the molar ratio of Li to Al (Li/Al ratio) in the slag that is obtained by the reduction melting process is set to 0.25 or more, while the molar ratio of Ca to Al (Ca/Al ratio) in the slag is set to 0.30 or more; the Mn amount in the slag is set to 5.0% by mass or more; and the oxygen partial pressure in a melt that is obtained by melting the starting material is controlled to be 10-14 to 10-11 in the reduction melting process.
Inventors:
YAMASHITA YU (JP)
HAGIO TOMOYA (JP)
HAGIO TOMOYA (JP)
Application Number:
PCT/JP2022/028093
Publication Date:
March 09, 2023
Filing Date:
July 19, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B5/02; C22B1/02; C22B5/10; C22B7/00; C22B23/02; C22B26/12
Domestic Patent References:
| WO2020212587A1 | 2020-10-22 | |||
| WO2020203937A1 | 2020-10-08 |
Foreign References:
| JP2013506048A | 2013-02-21 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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