Method of making steel

Details Method of making steel Method of making steel

1986-10-14

1987-09-22

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 46, 75 53, 75 58, C21C 702

Patent

active

046953183

ABSTRACT:
There is practiced a method of making low carbon silicon steel in which the lining of the ladle is made of dolomite instead of fireclay or alumina, and there is added to the ladle, before the metal is teemed into it, a pre-melted or pre-fused mixture containing appropriate portions of calcium silicate, lime, magnesia, and spar, and argon bubbling is practice as before but preferably for a slightly longer period of time, and the ladle is provided during argon bubbling with a hood or lid. There is then obtained a product steel with desirably low contents of oxygen and nitrogen, and without penalty in the form of higher contents of aluminum and titanium in the finished steel.

REFERENCES:
patent: 4036635 (1977-07-01), Klapdar
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E. T. Turkdogan, Ironmaking and Steelmaking, pp. 64-78, vol. 12, No. 2, 1985.
H. Saito et al., Trans. ISIJ, p. B-345, vol. 22, 1982.
A. Ishii et al., "The Ladle Refining Process for Alloyed Oil Country Tubular Goods Steels at Nippon Kokan KK", pp. 137 to 144 of Ladle Metallurgy Principles and Practices, published by the Iron and Steel Society of the AIME, edited by R. J. Fruehan, published 1985.
T. Takenouchi et al., Trans. ISIJ, pp. 758 to 765, vol. 19, 1979.
F. J. Havrilla et al., Start-up and Operation of USS Loraine-Cuyahoga Works, CAB Ladle Treatment Facilities, 1984.
D. J. Diederich et al., "Improving Internal Cleanliness for Bar and Rod Products", USS Publication, date not specified.
A. Moriya et al., "Steel Quality Improvement by Flux Injection", Scaninject III, Part III, pp. 32:1-32:34, 1983.
J. G. Yount et al., Steel Making Proceedings, pp. 194-202, vol. 64, 1981.

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