C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/102, 53/367
C22B 9/10 (2006.01) C21C 1/00 (2006.01) C21C 1/02 (2006.01) C21C 7/04 (2006.01)
Patent
CA 1297302
ABSTRACT OF THE DISCLOSURE: A process for the continuous treatment of hot metal as it is running from the blast furnace, in order to enable low phos- phorus and sulphur levels to he attained simply and cheaply, 50 that the metal thus treated is suitable for subsequent use in the convertor for the preparation of steels with a low and very low impurities content. Desulphurizing agent is added to the hot metal flowing in a trough into which it falls from the iron notch of a blast furnace, at a point close to that falling stream of hot metal. The silicon level is measured; and when it exceeds 0.25%, a cilicon reduction agent is subsequently added to the hot metal in the trough. Finally, a phosphorus reduction agent is added to the hot metal as it leaves the trough and falls into a receptacle such as a torpedo car. Slag can be skimmed following sulphur and sili- con treatments. The order of addition of the silicon reducing agent and sulphur reducing agent can be reversed.
524330
Crisafulli Adolfo
Palchetti Maurizio
Palella Santi
Centro Sperimentale Metallurgico S.p.a.
Centro Sviluppo Materiali S.p.a.
Crisafulli Adolfo
Palchetti Maurizio
Palella Santi
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