Title:
METHOD FOR RECOVERING VALUABLE METALS
Document Type and Number:
WIPO Patent Application WO/2024/048247
Kind Code:
A1
Abstract:
To provide a method of recovering, at low cost, valuable metals from waste lithium-ion batteries by a dry smelting process. The present invention is a method of recovering valuable metals from waste lithium-ion batteries, the method comprising: an oxidation roasting step S3 in which oxidation roasting is implemented on a raw material containing waste lithium-ion batteries; and a reduction step S4 in which the obtained oxidation-roasted matter is reduced in the presence of carbon. In the oxidation roasting step S3, an oxidant of 1.5 times or more the chemical equivalent of carbon within the raw material to be treated is introduced, and the oxidation roasting is carried out at a processing temperature selected in a range of 600°C to 900°C, so that the carbon grade of the obtained oxidation-roasted matter will be less than 1.0 mass%.
Inventors:
NAGAKURA TOSHIHIKO (JP)
YABE TAKAYUKI (JP)
YABE TAKAYUKI (JP)
Application Number:
PCT/JP2023/029291
Publication Date:
March 07, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B7/00; C22B1/02; C22B5/10; H01M10/54
Domestic Patent References:
| WO2021205903A1 | 2021-10-14 | |||
| WO2020013294A1 | 2020-01-16 |
Foreign References:
| JP2021161454A | 2021-10-11 | |||
| JP2012229481A | 2012-11-22 | |||
| JP2021161453A | 2021-10-11 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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