Cleansing of steel by gas rinsing

Details Cleansing of steel by gas rinsing Cleansing of steel by gas rinsing

1979-06-27

1980-12-09

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 59, C21C 702

Patent

active

042382270

ABSTRACT:
A method for deoxidizing steel to effect exceptional cleanliness wherein a relatively high amount of aluminum is added to the tap ladle before the first one-third volume of steel is tapped, and then adding conventional deoxidizers while the final two-thirds volume of steel is tapped. Argon is subsequently blown through the steel at a rate not exceeding 10 scfm for a period of about nine to twenty minutes.

REFERENCES:
patent: 3575695 (1971-04-01), Miyashita
patent: 3702243 (1973-11-01), Miltenberger
patent: 3754591 (1973-08-01), Bales
patent: 3769004 (1973-10-01), Barnhardt
patent: 3885957 (1975-05-01), Richter
patent: 3980469 (1976-09-01), Forster
patent: 3992195 (1976-11-01), Klapdar
patent: 4066444 (1978-01-01), Kosmider
Gerasimov, "Treatment of Metal in the Ladle With Inert Gas," pp. 33-34 (Jan. 1970).
Torsell, "The Effect of Clustering or the Elimination of Al.sub.2 O.sub.3 Inclusions Introduced the Aluminum Deoxidation of Liquid Steel", (Jul., 1970).
Nemoto, et al., "Operation and Technical Development of Wide Slab Continuous Caster at Nippon Kokan", pp. 13-18 (1949).
Holmes, "Argon Degassing of Seamless Tubular Steels", Journal of Metals, pp. 22-30 (Jun., 1973).

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