Method of degassing and decarburizing stainless molten steel

Details Method of degassing and decarburizing stainless molten steel Method of degassing and decarburizing stainless molten steel

1993-10-05

1994-10-18

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75711, C21C 710

Patent

active

053564561

ABSTRACT:
A method of degassing and decarburizing molten stainless steel in a vacuum, which molten steel is produced in a steel making furnace. Molten steel is foamed in a vacuum tank. Before foaming the [N] (%) in the molten steel is increased. The foam is produced by denitrification of the steel during vacuum degassing. Oxidizing gas is blown through a top-blow lance onto the surface of the steel in a vacuum tank, causing the reaction C+1/2O.sub.2 .fwdarw.CO to decarbonize the steel. Temperature decrease of the molten steel is resisted by combustion of CO produced by the reaction of C+1/2O.sub.2 .fwdarw.CO.

REFERENCES:
patent: 4104057 (1978-08-01), Maas
patent: 4979983 (1990-12-01), Nishikawa

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