Methods for simultaneously desulfurizing and degassing steels

Details Methods for simultaneously desulfurizing and degassing steels Methods for simultaneously desulfurizing and degassing steels

1985-11-21

1987-07-21

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 58, C21C 702

Patent

active

046816259

ABSTRACT:
A method is provided for removing sulfur and hydrogen from steel by the steps of pouring a stream of steel, low in oxygen and free of slag into a vertical tube installed in a ladle which extends from the bottom of the ladle to the top of the ladle, providing a means to introduce a flow of inert gas into the bottom of the tube to provide a stirring action within the tube, adding a lime based slag with a large capacity to absorb sulfur into the tube; adding ferro-alloys and metals into the tube which are known to enhance desulfurization and are necessary to achieve the specified composition of the steel; utilizing the stream of inert gas introduced into the bottom of the tube as a means for hydrogen removal.

REFERENCES:
patent: 3980469 (1976-09-01), Forster
patent: 3998625 (1976-12-01), Koros

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