Process for the production of alloy steel grades using treatment

Details Process for the production of alloy steel grades using treatment Process for the production of alloy steel grades using treatment

1991-12-23

1992-08-18

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75547, C21C 530

Patent

active

051395690

ABSTRACT:
In secondary steel refining, in addition to the process gas oxygen, the gases nitrogen and argon are employed as treatment gases in the bottom blowing converter. Oxygen and argon can be partially replaced by inexpensive CO.sub.2. The invention provides a process which makes it possible to completely replace nitrogen and argon by CO.sub.2.

REFERENCES:
patent: Re29584 (1978-03-01), Heise
patent: 4225341 (1980-09-01), Nilles
patent: 4450005 (1984-05-01), Nakao et al.
patent: 4555266 (1985-11-01), Wells

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