Steelmaking degassing apparatus

Details Steelmaking degassing apparatus Steelmaking degassing apparatus

1995-04-13

1996-05-28

Kastler, Scott

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By providing, treating or protecting environment, e.g., vacuum

266210, C21C 710

Patent

active

055203736

ABSTRACT:
A method for degassing molten steel comprises the use of a lift gas which includes carbon dioxide. The inventive method includes providing a reaction zone isolated from the ambient atmosphere, and providing a bath of molten steel, at least a portion of which is located in the reaction zone. The pressure is reduced in the reaction zone to a sub-atmospheric pressure. A gas comprising carbon dioxide is supplied to the bath of molten steel in order to vertically circulate the molten steel. The method also preferably includes (a) supplying carbon dioxide, e.g., with a tuyere, to the reaction zone and (b) supplying carbon dioxide to the bath of molten steel, e.g., by gas bubbling or stirring. An apparatus for performing the method steps is also disclosed.

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