Steel making process

Details Steel making process Steel making process

1979-10-16

1981-10-20

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 58, 75 60, 75257, C21C 702

Patent

active

042958822

ABSTRACT:
Molten steel in desiliconized, dephosphorized and decarburized in a three-step sequence. In the first-two steps the melt is agitated. In the first step the temperature is also maintained at between 1480.degree.-1380.degree. C. while oxygen is introduced until the silicon content is reduced to 0.20%. In the second step a flux consisting essentially of CaO and 0.2-0.5 parts by weight of CaCl.sub.2 and/or KCl is introduced while maintaining the basicity of the slag at between 3.5-8.0 and the T.Fe value at between 3-10%. The third step involves blowing oxygen onto this melt without using a refining flux.

REFERENCES:
patent: 2693411 (1954-11-01), Cremer
patent: 3153602 (1964-10-01), Duckett
patent: 3843354 (1974-10-01), Nilles
patent: 4036635 (1977-07-01), Klapdor
Huttenwerk Oberhausen AG, Technishe Berichte, pp. 1-2 (1951/1954).

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