Title: Vacuum degassing apparatus

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.

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Other info:

Inventors: Okada, Masaru (Nara, JA)
Inoue, Jun (Nishinomiya, JA)

Application Number: 594079
Filing Date: 1975-07-08
Publication_date: 1976-08-17
Assignee: Sumitomo Metal Industries, Ltd. (Osaka, JA)
Primary Class(es): 266/210
Other Classes:
US Patent Ref:

3116999	Jan, 1964	Armbruster	75/49.
3240588	Mar, 1966	Finkl	75/49.
3468525	Sep, 1969	Kawawa	266/34.
3523684	Aug, 1970	Cuscino et al.	266/34.
3606293	Sep, 1971	Erdely	266/34.
3618924	Nov, 1971	Messing	266/34.

Other Refs:
Primary Examiner: Dost, Gerald A.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack