Method for stably refining high carbon steel

Details Method for stably refining high carbon steel Method for stably refining high carbon steel

C - Chemistry, Metallurgy

21

C

53/91

C21C 5/34 (2006.01) C21C 5/32 (2006.01) C21C 5/35 (2006.01)

Patent

CA 1184383

ABSTRACT OF THE DISCLOSURE There is disclosed a method for stably refining high carbon steel by top and bottom blown converter refining in which the entire quantity or part of refining pure oxygen is blown onto molten iron through a top blowing lance nozzle while blowing an inert gas into the converter through a nozzle at the bottom thereof, and wherein the bottom blown inert gas is fed at a rate less than 0,09 Nm3/min?ton during the blowing and/or at a rate less than 0.03 Nm3/min?ton in a controlling stage immediately after turndown.

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