High alumina refractory shapes
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United States of America Patent
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Aug 16, 1994
Grant Date -
N/A
app pub date -
Jun 21, 1993
filing date -
Jun 21, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Mixes for forming high alumina refractory shapes with high resistance to aluminum penetration comprising at least about 60% by weight aluminum oxide, about 1 to 5% by weight boron phosphate, and about 5 to 15% by weight silicon carbide. A phosphorous-containing binder is added and the mix can be formed into brick which when cured or burned to a temperature below the oxidation temperature of silicon carbide can be used to minimize aluminum penetration and dross when the brick are employed in a metallurgical vessel in contact with molten aluminum.
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