Method for providing steel with lowered hydrogen level after lad

Details Method for providing steel with lowered hydrogen level after lad Method for providing steel with lowered hydrogen level after lad

1991-05-02

1992-04-21

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75305, 106 3827, 164464, 164473, C21C 536

Patent

active

051064120

ABSTRACT:
A method is provided for obtaining steel with lowered hydrogen levels after ladle treatment. The method includes covering molten steel in the ladle with a particulate mixture consisting essentially of calcium aluminate and dolomitic limestone. The mixture is used in amounts of about 5 to 25 pounds per net ton of molten steel. Using the method of this invention, some steels to be cast without vacuum degassing to reduce the hydrogen level.

REFERENCES:
patent: 4373949 (1983-02-01), Spruell et al.
patent: 4417924 (1983-11-01), Schwer
patent: 4795491 (1989-01-01), Quigley
patent: 5028257 (1991-07-01), Tomkins et al.

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