Title:
PRODUCTION METHOD FOR VALUABLE METALS
Document Type and Number:
WIPO Patent Application WO/2023/162361
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, from raw materials containing valuable metals including Cu, Ni, and Co, said valuable metals. The method includes: a preparation step for preparing raw material including Li, Al, and valuable metals; a reduction melting step for subjecting the raw material to a reduction melting treatment using a melting furnace in which is provided a cooling means for cooling the furnace wall from the outside, to obtain a reduced material comprising slag and an alloy containing valuable materials; and a slag separation step for separating the slag from the reduced material to collect the alloy. A flux containing Ca is added to the raw material in one or both of the preparation step and the reduction melting step. In the reduction melting step, while the furnace wall of the melt furnace is cooled by the cooling means, the thickness of the slag layer is adjusted so that the interface temperature between the alloy layer and the slag layer becomes greater than the surface temperature of refractories on the furnace wall in the melt furnace.
Inventors:
YAMASHITA YU (JP)
MAEBA KAZUNARI (JP)
NAGAKURA TOSHIHIKO (JP)
MAEBA KAZUNARI (JP)
NAGAKURA TOSHIHIKO (JP)
Application Number:
PCT/JP2022/041659
Publication Date:
August 31, 2023
Filing Date:
November 09, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B7/00; B09B3/40; C22B15/00; C22B23/02; H01M10/54
Domestic Patent References:
| WO2011035916A1 | 2011-03-31 | |||
| WO2022019172A1 | 2022-01-27 |
Foreign References:
| JP2013506048A | 2013-02-21 | |||
| JPS5337461A | 1978-04-06 | |||
| JP2020193363A | 2020-12-03 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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