Title:
METHOD FOR DESULFURIZING MOLTEN METAL
Document Type and Number:
WIPO Patent Application WO/2022/172568
Kind Code:
A1
Abstract:
Proposed is a method for efficiently desulfurizing a molten metal in a short time without passing an excessive current when applying a potential difference between a slag and the metal. A method for desulfurizing a molten metal by using a DC power source, setting an electrode in contact with the molten metal as a negative electrode, setting an electrode in contact with only the molten slag as a positive electrode, and providing a potential difference between the molten slag and the molten metal through both electrodes, wherein an applied current density Ja is determined according to equilibrium reaching S concentration [S]e0 before applying the potential difference, so that an equilibrium reaching S concentration [S]ea when the potential difference is applied becomes equal to or lower than a target S concentration [S]ft.
Inventors:
NEGISHI HIDEMITSU (JP)
Application Number:
PCT/JP2021/045104
Publication Date:
August 18, 2022
Filing Date:
December 08, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21C7/064
Foreign References:
| JP2020180319A | 2020-11-05 | |||
| JPH093515A | 1997-01-07 | |||
| CN102399937A | 2012-04-04 | |||
| JPH049420A | 1992-01-14 |
Other References:
D. J. SOSINSKY ET AL., METALL. TRANS., vol. 17B, 1986, pages 331
TAKASHI NAKAMURA ET AL., BULLETIN OF THE JAPAN INSTITUTE OF METALS, vol. 50, no. 5, 1986, pages 456 - 461
See also references of EP 4265743A4
TAKASHI NAKAMURA ET AL., BULLETIN OF THE JAPAN INSTITUTE OF METALS, vol. 50, no. 5, 1986, pages 456 - 461
See also references of EP 4265743A4
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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