Method for desulfurizing a molten iron by injection

Details Method for desulfurizing a molten iron by injection Method for desulfurizing a molten iron by injection

1983-09-15

1984-09-25

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 52, 75 53, 75257, C21C 702

Patent

active

044733984

ABSTRACT:
Injection-desulfurization of a molten iron is carried out in a low cost by using powdery CaCO.sub.3 obtained by pulverizing limestone as a desulfurizing agent. This injection-desulfurization also can be attained by using a powdery mixture in which a main ingredient is said powdery calcium carbonate and not more than 30% by weight of powdery quicklime is added thereto, a powdery mixture in which a main ingredient is said powdery calcium carbonate and 5.about.20% by weight of a carbonaceous material and 2.about.15% by weight of at least one of halides of alkali and alkaline earth metals are added thereto, or a powdery mixture in which a main ingredient is said calcium carbonate and 5.about.20% by weight of a carbonaceous material, 2.about.15% by weight of at least one of halides of alkali and alkaline earth metals and not more than 30% by weight of powdery quicklime are added thereto, as the desulfurizing agent.

REFERENCES:
patent: 3853540 (1974-12-01), Schlatter
patent: 4209325 (1980-06-01), Cooper
patent: 4217134 (1980-08-01), Russell
patent: 4266969 (1981-05-01), Koros

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