Backup structure for an uprising pipe or downfalling pipe in a vacuum degassing apparatus
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United States of America Patent
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Jul 27, 2010
Grant Date -
May 29, 2008
app pub date -
Dec 13, 2007
filing date -
Jun 28, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A backup structure for an uprising pipe or a downfalling pipe of a vacuum degassing apparatus including the uprising pipe, a vacuum degassing vessel and the downfalling pipe, comprises the uprising pipe or the downfalling being made of platinum or a platinum alloy and having refractory bricks disposed therearound; and the refractory bricks having a thermal expansion relief member disposed on a top end thereof, the thermal expansion relief member comprising a material selected from a metal material and a ceramic material having a creep strength (JIS Z2271: 1993) of 35 MPa or above at 760° C.
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