Patent ID: 8563083

Claim:
A method for manufacturing a black liquor gasifier liner comprising: lining a surface of a black liquor gasifier which operates in an aqueous environment that is subject to operating pressures of black liquor gasification and wear by an alkali environment and/or an alkaline environment with a refractory composition comprising greater than 70 percent by weight of a refractory aggregate consisting essentially of a calcium hexa aluminate clinker having the formula CA 6 , wherein C is equal to calcium oxide, wherein A is equal to aluminum oxide, and wherein said hexa aluminate clinker has from zero to less than about fifty weight percent C 12 A 7 , and wherein greater than 98 weight percent of said calcium hexa aluminate clinker having a particle size ranging from −20 microns to +3 millimeters, for forming a liner of said surface prior to contacting said surface with at least one of an alkali material, and an alkaline material, or combinations of said alkali and said alkaline materials, and providing said liner wherein said refractory composition has a surface that is devoid of thermal expansive glass phases when contacted with said alkali and/or alkaline environments at temperatures below 1830° C.