Title:
PRODUCTION METHOD FOR VALUABLE METALS
Document Type and Number:
WIPO Patent Application WO/2023/157397
Kind Code:
A1
Abstract:
Provided is a method by which it is possible to safely and efficiently collect valuable metals from raw material including waste lithium-ion batteries or the like. The present invention is a method for producing valuable metals from raw material containing valuable metals including Cu, Ni and Co. The method includes at least: a preparation step for preparing raw material containing Li, Al, and valuable metals; a reduction melting step for subjecting the raw material to reduction melting treatment using a melting furnace provided with a cooling means for cooling the furnace walls from the outside to obtain a reduced product comprising a valuable metals-containing alloy and slag; and a slag separation step for separating the slag from the reduced product to collect the alloy. One or both of the preparation step and the reduction melting step include adding Ca-containing flux to the raw material. In the reduction melting step, while the furnace walls of the melting furnace are cooled with the cooling means, a solid slag layer having a Ca/Al value smaller than the Ca/Al value of the slag or a solid slag layer containing 15 mass% or more Al and 3 mass% or more Li is formed on the inside surface of the melting furnace.
Inventors:
YAMASHITA YU (JP)
MAEBA KAZUNARI (JP)
NAGAKURA TOSHIHIKO (JP)
MAEBA KAZUNARI (JP)
NAGAKURA TOSHIHIKO (JP)
Application Number:
PCT/JP2022/041660
Publication Date:
August 24, 2023
Filing Date:
November 09, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B7/00; B09B5/00; C22B5/02; C22B15/00; C22B23/02; F27D1/12; H01M10/54
Domestic Patent References:
| WO2011035916A1 | 2011-03-31 | |||
| WO2022019172A1 | 2022-01-27 |
Foreign References:
| JP2013506048A | 2013-02-21 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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