Patent ID: 8354056

Claim:
A refractory assembly comprised of: a precast shape formed of a castable refractory material having an outer surface that includes a plurality of spaced-apart recesses in said outer surface, each spaced-apart recess having a single outer peripheral edge that surrounds each spaced-apart recess, each spaced-apart recess extends inwardly in a direction perpendicular to said outer surface of said precast shape and each peripheral edge of each spaced-apart recess is displaced from each neighboring peripheral edge of other adjacent spaced-apart recesses in a first direction and a second direction, a refractory material applied to said outer surface of said precast shape, said refractory material extending into said plurality of spaced-apart recesses to lock said precast shape into said refractory material and to define a tortuous, convoluted path between said outer surface of said precast shape and said refractory material.