Title:
有価金属の製造方法
Document Type and Number:
Japanese Patent JP7342989
Kind Code:
B2
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.
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Inventors:
Yu Yamashita
Kazuya Maeba
Toshihiko Nagakura
Kazuya Maeba
Toshihiko Nagakura
Application Number:
JP2022025641A
Publication Date:
September 12, 2023
Filing Date:
February 22, 2022
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B7/00; B09B3/40; C22B15/00; C22B23/02; H01M10/54
Domestic Patent References:
| JP2013506048A | ||||
| JP53037461A | ||||
| JP2020193363A |
Foreign References:
| WO2011035916A1 | ||||
| WO2022019172A1 |
Attorney, Agent or Firm:
Masayuki Shobayashi
Kazuyoshi Hayashi
Kazuyoshi Hayashi