Loading patent…
AssigneeWestmoreland Advanced Materials, Inc.
InventorKenneth A. McGowan
Estimating the term…
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.
A 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, and x is an integer from about 1 to about 24, wherein the concentration of a C12A7 phase is less than about 50% C12A7, and including a source of barium that is substituted for calcium in the 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 the calcium aluminate clinker has from zero to less than about 50 wt % C12A7, and wherein greater than 98 weight percent of the calcium aluminate clinker having a particle size ranging from 325 mesh to +10 mesh.
Dependencies are inferred from the claim text.