Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1974-05-20
1976-05-11
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 53, 75 93G, C21C 706, C22B 910
Patent
active
039559670
ABSTRACT:
The treatment, preferably sulphide modification of molten steel in the ladle, which treatment is effected by the addition of an agent which is normally highly reactive to oxygen, such as rare earth metal compounds, particularly rare earth metal silicides, thereto after a desired amount of deoxidation of the molten steel has taken place, preferably after substantially complete deoxidation of said molten steel in which addition agent is enclosed in at least one metal, preferably steel container suspended in the molten steel in the ladle such that at least that portion of the container containing the addition agent is disposed below the surface of the molten steel in the ladle whereby the addition agent is distributed into the molten steel on melting of the walls of the container, the thickness of the walls of the container being selected to provide the required delay in the introduction of the addition agent in said steel for the desired amount of deoxidation of the steel to have taken place in the ladle.
REFERENCES:
patent: 1119643 (1914-12-01), Saklatwalia
patent: 1275449 (1918-08-01), Lemon
patent: 1899152 (1933-02-01), Jeavons
patent: 2633438 (1953-03-01), Uhle
patent: 3438820 (1969-04-01), Goss
patent: 3467167 (1969-09-01), Mahin
patent: 3634075 (1972-01-01), Hoff
patent: 3729309 (1973-04-01), Kawawa
patent: 3738827 (1973-06-01), Pryor
Rosenberg Peter D.
The Algoma Steel Corporation Limited
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