Title:
METHOD FOR PRODUCING VALUABLE METAL
Document Type and Number:
WIPO Patent Application WO/2023/286386
Kind Code:
A1
Abstract:
Provided is a method for safely and efficiently recovering a valuable metal from a material including waste lithium ion batteries or the like. The present invention is for producing a valuable metal from a material including the valuable metal, the method comprising: a preparation step for preparing a material including at least Li, Al, and a valuable metal; a reduction and melting step for carrying out a reduction and melting process on the material to obtain a reduced product including a slag and an alloy containing a valuable metal; and a slag separation step for separating the slag from the reduced product to recover the alloy. In the preparation step and/or the reduction and melting step, a flux containing Ca is added to the material. In the reduction and melting step, the reduction and melting process is carried out such that the mass ratio of aluminum oxide / (aluminum oxide + calcium oxide + lithium oxide), in the generated slag, is set to 0.5-0.65, and the slag heating temperature is set to 1400-1600ºC.
Inventors:
YAMASHITA YU (JP)
NAGAKURA TOSHIHIKO (JP)
YABE TAKAYUKI (JP)
NAGAKURA TOSHIHIKO (JP)
YABE TAKAYUKI (JP)
Application Number:
PCT/JP2022/014650
Publication Date:
January 19, 2023
Filing Date:
March 25, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B1/02; C22B5/02; C22B7/00; C22B9/10; F27D1/12
Foreign References:
| JP2021031760A | 2021-03-01 | |||
| JP2013506048A | 2013-02-21 | |||
| JP6819827B2 | 2021-01-27 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
Download PDF: