Method and apparatus for testing the integrity of a shroud seal on a ladle for a continuous casting installation
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United States of America Patent
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-
Dec 8, 2009
Grant Date -
Oct 9, 2008
app pub date -
Apr 5, 2007
filing date -
Apr 5, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Molten steel is conducted by a tubular shroud interconnecting a slide gate at a bottom tap hole of a ladle with the molten steel in an underlying tundish of a continuous caster. The flow path is confirmed to be isolated from contaminants in atmospheric air by applying a source of partial vacuum to the internal cavity of tubular shroud to allow prevailing atmospheric pressure acting on molten steel in a tundish to push molten steel upwardly in the internal cavity of the tubular shroud. A measure of the partial vacuum in the cavity of the shroud is used to assess the integrity of the gas tight seal. Before and after the integrity of the gas tight seal is determined, a three way valve is used to apply an inert gas to the volume in the cavity of the shroud.
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