Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1991-08-21
1992-05-12
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C22B 400
Patent
active
051123878
ABSTRACT:
A method to produce stainless steels in electric arc furnaces without secondary processing is disclosed. The method includes three main steps: melting, oxidizing and reducing periods; during all of the steps natural gas is bottom blowed. During the oxidizing period an oxygen blow is accomplished preferably through a vertical lance and during the reducing period a chromium adjustment can be carried out by chromium ore additions.
REFERENCES:
patent: 3728101 (1973-04-01), d'Entremont
patent: 3854932 (1974-12-01), Bishop
patent: 4021233 (1977-05-01), Johnson
patent: 4045213 (1977-08-01), Leroy
patent: 4362556 (1982-12-01), Kishida
patent: 4783219 (1988-11-01), Mori
Brown Laurence R.
Instituto Mexicano de Investigaciones Siderurgicas
Rosenberg Peter D.
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