Corrosion resistant castable refractory mix
AssigneeAluminum Company of America
InventorRichard G. La Bar
Life of this patent
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Abstract
A corrosion resistant castable refractory mix is provided comprising a particulate mixture capable of mixture with water to form a castable refractory having enhanced corrosion resistance to molten aluminum. The mixture consists essentially of 20-34 parts by weight calcium aluminate, 6-10 parts by weight of a zinc borosilicate frit, and 60-70 parts by weight fused silica. The zinc borosilicate frit consists essentially of 50-60% by weight zinc oxide, 20-40% by weight boron oxide, 8-12% by weight silicon oxide, and 0-10% by weight aluminum oxide with less than 0.5% by weight of other impurities. The refractory mix contains not greater than 1% by weight impurities.
Claims6
A particulate refractory mixture capable of mixture with water to form a castable refractory having enhanced corrosion resistance to molten aluminum consisting essentially of:
- 90-94% by weight refractory material and 6-10% by weight of a zinc borosilicate frit consisting essentially of 50-60% by weight zinc oxide, 20-40% by weight boron oxide, 8-12% by weight silicon oxide and 0-10% by weight aluminum oxide with less than 0.55% by weight impurities in the frit and not more than 1% by weight impurities in the refractory mixture.
A corrosion resistant castable refractory mix capable of mixture with water to form a castable refractory having enhanced corrosion resistance to molten aluminum consisting essentially of 20-34% by weight calcium aluminate, 6-10% by weight of a zinc borosilicate frit consisting essentially of zinc oxide, boron oxide, and silicon oxide with less than 0.5% by weight impurities, and 60-70% by weight fused silica.
Dependencies are inferred from the claim text.