Alumina-silicon carbide-carbon refractory castable containing magnesium aluminate spinel
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United States of America Patent
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Aug 3, 1999
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N/A
app pub date -
Feb 23, 1998
filing date -
Feb 23, 1998
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Expired
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Abstract
A refractory castable comprised of: about 45% to about 75% by weight high alumina grain; about 2% to about 35% by weight silicon carbide; about 1% to about 8% by weight carbon; about 1% to about 8% by weight calcium aluminate cement; and about 1% to about 10% by weight fine magnesium aluminate spinel, the spinel having a grain size of less than about 150 .mu.m (100 Tyler mesh) and being comprised of about 10% to about 33% by weight magnesium oxide (MgO) and about 67% to about 90% by weight alumina (Al.sub.2 O.sub.3).
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