Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1975-05-07
1976-10-12
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 46, 75 60, 266201, C21C 700
Patent
active
039855490
ABSTRACT:
The disclosed process of continuously refining molten metal is carried out in a refining apparatus having communicating first and second refining stage spaces. Refining gas, such as oxygen, is blown into the molten metal in the presence of a slag layer on the molten metal. The molten metal and the slag are conveyed as two separate non-intermingled streams through the refining stage spaces, as distinguished from a slag-metal emulsion. The slag in the second refining stage space is caused continuously to flow back into the first refining stage space to form a slag layer on the molten metal in the first refining stage space. Refining gas is blown into the molten metal in the first refining stage space below said slag layer, and the molten metal is conveyed from said first refining stage space to said second refining stage space while preventing the flow of slag from said first refining stage space to said second refining stage space. Refining gas is blown onto said molten metal in said second refining stage space in the presence of slag so that a slag layer on the molten metal in said second refining stage space is formed. The molten metal and the slag are separated from each other after the molten metal has passed through said second refining stage space.
REFERENCES:
patent: 2707675 (1955-05-01), Graef
patent: 2918365 (1959-12-01), Kanamori
patent: 3275432 (1966-09-01), Alexandrovsky
patent: 3565605 (1971-02-01), Vayssiere
patent: 3617257 (1971-11-01), Rouang
patent: 3692290 (1972-09-01), Hager
Berner Klaus
Mahn Gustav
Rheinlander Paul
Ruhland, legal representative by Ingrid
Schulz, deceased Klaus
Rosenberg Peter D.
Stahlwerke Peine-Salzgitter Aktiengesellschaft
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