C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/13, 53/91
C21C 5/34 (2006.01) C21C 5/35 (2006.01) F27D 3/16 (2006.01)
Patent
CA 1153560
ABSTRACT OF THE DISCLOSURE A method of producing carbon steel and low-alloy steel in a basic oxygen furnace is disclosed, in which a blow of the bottom-blowing gas predominantly comprised of carbon dioxide is introduced into a molten metal through at least one nozzle provided in the bottom or side wall of said basic oxygen furnace at least partly during the period of time from the beginning of blowing to the tapping of the melt, and the flow rate of the bottom-blowing gas is 1/200 - 9/200 the rate of oxygen impinged upon the melt through a lance. A steel making apparatus adapted to carry out the above-mentioned novel method of producing steel is also disclosed, which comprises, in combination, a furnace permitting both top-blowing of pure oxygen and bottom-blowing of a gas mainly composed of carbon dioxide, means for collecting the waste gas generated from the furnace, means for mixing the waste gas with oxygen and/or steam, means for burning the mixture thereof, and means for injecting the resulting combustion gas into the molten metal within said furnace.
352347
Anezaki Syoji
Hirata Takeyuki
Hiroki Nobuyoshi
Kajimoto Tsutomu
Marukawa Katsukiyo
George H. Riches And Associates
Sumitomo Metal Industries Ltd.
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