C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
53/108, 53/77
C21C 7/10 (2006.01)
Patent
CA 1337846
A process of degassing and decarbonizing is directed to a process for performing vacuum degassing non-deoxidized or slightly deoxidized molten steel utilizing RH process or DH process. The process includes blowing of oxygen or oxygen containing gas toward the surface of the molten steel in a vacuum chamber for promoting decarbonizing reaction. The process further includes a step of combusting CO gas in the vicinity of the surface of the molten metal at a timing, in which the concentration of (CO + CO2) in an exhaust gas is higher than or equal to 5% by volume and at a CO2/(CO + CO2) ratio in the exhaust gas is approximately 0.3. Heat generated by combustion of CO gas is utilized for compensating temperature drop of the molten steel.
603224
Asaho Ryuichi
Kameyama Kyoichi
Nishikawa Hiroshi
Kawasaki Steel Corporation
Smart & Biggar
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