Molten metal slide gate valve
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United States of America Patent
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Mar 31, 1992
Issued Date -
N/A
app pub date -
Mar 25, 1991
filing date -
Apr 16, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A molten metal slide gate valve for use on a ladle or tundish. The slide gate valve uses a refractory plate or plates having a shallow groove all around the periphery of one or both surfaces of the plate. The groove surrounds the molten metal orifice in the plate. The base of the groove has a porous refractory insert connected to a source of nonoxidizing gas under pressure to provide a nonoxidizing gas seal all around the molten metal orifices in the slide gate valve and to prevent the aspiration of air into the molten metal orifices during discharge of the molten metal from the ladle or tundish.
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