Process for desulfurizing molten steel

Details Process for desulfurizing molten steel Process for desulfurizing molten steel

1984-11-26

1985-12-24

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 58, 75257, C21C 552

Patent

active

045604053

ABSTRACT:
A process for desulfurizing molten steel comprising the steps of: removing converter slag from molten steel; adding a desulfurizing flux onto the molten steel from which the converter slag has been removed; supplying power to electrodes at a predetermined distance from the molten steel so as to generate an electric arc, the desulfurizing flux being melted by arc-heating so as to form the slag; and introducing a gas into the molten steel through a lance submerged into the molten steel to stir the molten steel and the slag which are arc-heated. In the process the desulfurizing flux is melted to a slag consisting essentially of 53 to 62% of CaO, 0 to 15% of SiO.sub.2, and 30 to 45% of Al.sub.2 O.sub.3.

REFERENCES:
patent: 4308415 (1981-12-01), Hasegawa
patent: 4341554 (1982-07-01), Koras
patent: 4362556 (1982-12-01), Kishida
McGannon, The Making, Shaping & Treating of Steel (8th ed.), p. 314, (1964).

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