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AssigneeWestmoreland Advanced Materials, Inc.
InventorKenneth A. McGowan
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The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said clinker has from zero to less than about fifty weight percent C12A7, and including a source of barium that is substituted for calcium in said calcium aluminate clinker. Analogs, derivatives and hydrates of the improved calcium aluminate clinker are provided. A refractory composition and a sprayable refractory composition are disclosed comprising the improved calcium aluminate clinker. A method for improving the insulating character and/or penetration resistance of a liner in contact with molten aluminum in an aluminum manufacturing process or during aluminum transport is provided.
An improved calcium aluminate clinker of the type having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, and x is an integer from about 1 to about 24, the improvement comprising limiting the concentration of a C12A7 phase to less than about fifty percent C12A7, and including a source of barium that is substituted for calcium in said calcium aluminate clinker.
A cast product or a shaped pressed product comprising a refractory composition comprising a refractory aggregate consisting essentially of a calcium aluminate clinker having the formula CnAx, wherein C is equal to calcium oxide, wherein A is equal to aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said calcium aluminate clinker has from zero to less than about fifty weight percent C12A7, and wherein greater than 98 weight percent of said calcium aluminate clinker having a particle size ranging from 325 mesh to +10 mesh.
Dependencies are inferred from the claim text.