Title:
PRODUCTION METHOD FOR VALUABLE METALS
Document Type and Number:
WIPO Patent Application WO/2023/286387
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 which is for producing valuable metals from raw material that contains valuable metals including Cu, Ni, and Co and which includes: a step for preparing raw material including at least Li, Al, and the valuable metals; a step for obtaining a reduction that includes slag and an alloy containing the valuable metals by subjecting the raw material to a reduction melting treatment; and a slag separation step for collecting the alloy by separating out the slag from the reduction, wherein, in a step for adding a flux containing calcium (Ca) to the raw material and performing reduction and melting thereof, the reduction melting treatment is performed such that the liquidus line temperature of ternary Al2O3–Li2O–CaO slag in a phase diagram is greater than the liquidus line temperature of a ternary Cu–Ni–Co alloy in a phase diagram.
Inventors:
YAMASHITA YU (JP)
NAGAKURA TOSHIHIKO (JP)
HAGIO TOMOYA (JP)
NAGAKURA TOSHIHIKO (JP)
HAGIO TOMOYA (JP)
Application Number:
PCT/JP2022/014653
Publication Date:
January 19, 2023
Filing Date:
March 25, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B1/04; C22B5/02; C22B7/00; C22B9/10; C22B15/00; C22B23/02
Foreign References:
| JP2021031760A | 2021-03-01 | |||
| JP2019135321A | 2019-08-15 | |||
| JP2013506048A | 2013-02-21 | |||
| JP6819827B2 | 2021-01-27 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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