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US 4,522,926 AGranted
Aluminum resistant refractory composition
AssigneeCombustion Engineering, Inc.
InventorFrank T. Felice
Life of this patent
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Abstract
A refractory composition for use in contact with molten aluminum alloys containing a refractory aggregate, a binder and 9Al.sub.2 O.sub.3.2B.sub.2 O.sub.3. The aluminum borate may be of the type produced as a by-product in the production of ferro-boron alloys and known as aluminum boron slag.
Claims6
A refractory composition resistant to attack by molten aluminum alloys consisting essentially of:
- a. 45 to 90 weight percent refractory aggregate particles compatible with the selected refractory binder,
- b. 3 to 40 weight percent refractory binder selected from the group consisting of calcium aluminate cement, aluminum phosphate, phosphoric acid, alkali silicates and clay, and
- c. an additive consisting essentially of crystalline 9Al.sub.2 O.sub.3.2B.sub.2 O.sub.3 such that the refractory composition contains 1 to 12 percent 9Al.sub.2 O.sub.3.2B.sub.2 O.sub.3 by weight.
Dependencies are inferred from the claim text.