Cover for launders

Details Cover for launders Cover for launders

1996-07-09

1998-04-28

Kastler, Scott

Metallurgical apparatus

Process

Plugging or tapping

266158, 266196, C21B 714

Patent

active

057440930

ABSTRACT:
A cover is provided for a launder, or an equivalent open-topped vessel for containing molten metal, the cover including a heat-insulative layer spanning the open top of the vessel, with a spacer arrangement to maintain a gap of uniform width between the heat-insulative layer and the open-top. A housing defines an evacuation plenum, and connections are made to allow an exhaust device to remove gaseous materials from the plenum. Adjacent the gap is an air-guide arrangement which directs outside air into the evacuation chamber along a path which is intercepted by any gaseous materials exiting through the gap, whereby such gaseous materials are entrained into the evacuation chamber.

REFERENCES:
patent: 3863907 (1975-02-01), Pierson, Sr. et al.
patent: 4216708 (1980-08-01), Wyatt et al.
patent: 4405363 (1983-09-01), Tivelius
patent: 4720837 (1988-01-01), Kanada

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