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Title:
METHOD FOR REFINING HIGH-S CHROMIUM STEEL
Document Type and Number:
Japanese Patent JPS61170507
Kind Code:
A
Abstract:

PURPOSE: To reduce the melt fracture of the refractories of a refining furnace and to increase the yield of Cr when a high-S Cr steel is refined, by carrying out refining so as to regulate the amount of S in slag to a specified value during refining and the basicity of slag to a specified value after refining.

CONSTITUTION: A high-S Cr steel contg. 0.1W0.5% S is refined in a refining furnace. At this time, refining is carried out so as to regulate the amount of S in slag to 1.5W6% during refining and the basicity (CaO/SiO2) of slat to 1.2W2 after refining. Since the basicity of slag can be kept high during refining, the erosion of the refractories of the furnace is reduced, and a high yield of Cr is attained.


Inventors:
IKEHARA YASUMASA
ARIYOSHI HARUKI
HIDAKA RYOICHI
Application Number:
JP1108885A
Publication Date:
August 01, 1986
Filing Date:
January 25, 1985
Export Citation:
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Assignee:
NIPPON STEEL CORP
International Classes:
C21C5/28; C21C5/00; C21C5/36; C21C7/00; C21C7/064; C21C7/068; (IPC1-7): C21C5/28; C21C5/36
Attorney, Agent or Firm:
Kazuo Ozeki



 
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