Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By providing – treating or protecting environment – e.g. – vacuum
Patent
1975-07-08
1976-08-17
Dost, Gerald A.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By providing, treating or protecting environment, e.g., vacuum
C21C 710
Patent
active
039750043
ABSTRACT:
A vacuum degassing apparatus is so constructed that molten steel is circulated or flowed between a ladle and a vacuum vessel through a tube, the molten steel is degassed in the vacuum vessel, the surrounding air is prevented from flowing into the ladle during a degassing operation by placing a cover at the top of the ladle, an inert gas is forced into the ladle for sealing the molten steel from the surrounding atmosphere, and, when necessary, a space between the ladle and the vacuum vessel is sealed by a bellows.
REFERENCES:
patent: 3116999 (1964-01-01), Armbruster
patent: 3240588 (1966-03-01), Finkl
patent: 3468525 (1969-09-01), Kawawa
patent: 3523684 (1970-08-01), Cuscino et al.
patent: 3606293 (1971-09-01), Erdely
patent: 3618924 (1971-11-01), Messing
Inoue Jun
Okada Masaru
Dost Gerald A.
Sumitomo Metal Industries Ltd.
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