Title:
ELECTRIC FURNACE AND METHOD FOR PRODUCING VALUABLE METAL
Document Type and Number:
WIPO Patent Application WO/2023/026854
Kind Code:
A1
Abstract:
Provided is a technology for executing stable processing by extending the furnace refractory life in an electric furnace for heating and melting a raw material containing a valuable metal. The present invention provides an electric furnace 1 for heating and melting a raw material 2 containing a valuable metal, the electric furnace 1 including: a furnace body 11; and a plurality of electrodes 12 that are provided so as to hang down into the interior of the furnace body 11 from a top section thereof. The raw material 2 is heated and melted in the furnace body 11 by energizing the electrodes 12 and a molten material consisting of a slag 3 and a metal 4 is generated. The electric furnace 1 is configured so that the overall heat transfer coefficient of a side wall 11B of the furnace body 11 is lower than the overall heat transfer coefficient of a side wall 11A of the furnace body 11, the side wall 11B coming into contact with a layer of the metal 4 formed in a bottom layer, the side wall 11A coming into contact with a layer of the slag 3 formed in a top layer, and said layers being formed in the molten material due to gravity separation.
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Inventors:
MAEBA KAZUNARI (JP)
Application Number:
PCT/JP2022/030429
Publication Date:
March 02, 2023
Filing Date:
August 09, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B7/00; F27B3/14; F27B3/16; F27D1/00
Domestic Patent References:
| WO2019092951A1 | 2019-05-16 |
Foreign References:
| JP2016114317A | 2016-06-23 | |||
| JP2008531971A | 2008-08-14 | |||
| JPH05141868A | 1993-06-08 | |||
| JPS54150304A | 1979-11-26 | |||
| JP5818798B2 | 2015-11-18 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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