Title:
METHOD FOR RECOVERING VALUABLE METAL
Document Type and Number:
WIPO Patent Application WO/2022/019172
Kind Code:
A1
Abstract:
The present invention provides a method for recovering a valuable metal with high efficiency, while suppressing refractory erosion in a furnace and efficiently removing impurity metals in cases where a valuable metal is recovered from a valuable metal-containing burden by a pyrometallurgy process. A method for recovering valuable metals (Cu, Ni, Co), said method comprising: a step for preparing, as a starting material, a burden that contains at least the valuable metals; a step for heating and melting the staring material into an alloy and slag; and a step for recovering the alloy that contains the valuable metals by separating the slag therefrom. When the staring material is heated and melted, the starting material is charged into an electric furnace that is internally provided with an electrode, and the starting material is melted by means of Joule heat that is generated by applying a current to the electrode or by means of heat generation of an arc itself, thereby being separated into a molten alloy and molten slag that is positioned above the alloy.
Inventors:
MAEBA KAZUNARI (JP)
YAMASHITA YU (JP)
NAGAKURA TOSHIHIKO (JP)
TAKAHASHI JUNICHI (JP)
TOGASHI RYO (JP)
YAMASHITA YU (JP)
NAGAKURA TOSHIHIKO (JP)
TAKAHASHI JUNICHI (JP)
TOGASHI RYO (JP)
Application Number:
PCT/JP2021/026190
Publication Date:
January 27, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
B09B3/00; C22B7/00; C22B9/20; C22B15/00; C22B23/02; F27D11/04; F27D11/08; H01M10/54
Domestic Patent References:
| WO2019092951A1 | 2019-05-16 |
Foreign References:
| JP2014105348A | 2014-06-09 | |||
| JPH07126793A | 1995-05-16 | |||
| JP2012041569A | 2012-03-01 | |||
| JP5818798B2 | 2015-11-18 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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