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Methods of use of calcium hexa aluminate refractory linings and/or chemical barriers in high alkali or alkaline environments

United States Patent

October 22, 2013
View the Complete Patent at the US Patent & Trademark Office
A method for improving the insulating character/and or penetration resistance of a liner in contact with at least one of an alkali and/or alkaline environments is provided. The method comprises lining a surface that is subject to wear by an alkali environment and/or an alkaline environment with a refractory composition comprising a refractory aggregate consisting essentially of a calcium hexa aluminate clinker having the formula CA.sub.6, wherein C is equal to calcium oxide, wherein A is equal to aluminum oxide, and wherein the hexa aluminate clinker has from zero to less than about fifty weight percent C.sub.12A.sub.7, and wherein greater than 98 weight percent of the calcium hexa aluminate clinker having a particle size ranging from -20 microns to +3 millimeters, for forming a liner of the surface. This method improves the insulating character/and or penetration resistance of the liner.
McGowan; Kenneth A. (Harrison City, PA), Cullen; Robert M. (Bethel Park, PA), Keiser; James R. (Oak Ridge, TN), Hemrick; James G. (Knoxville, TN), Meisner; Roberta A. (Knoxville, TN)
Westmoreland Advanced Materials, Inc. (Monessen, PA)
11/ 901,909
September 19, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH Certain embodiments of this invention were made with Government support in conjunction with Oak Ridge National Laboratory under contract CEED 001 and ED1904032 awarded by the Department of Energy. The Government may have certain rights in the invention.