Patent ID: 6313055
Filing Date: 2001-11-06
Classification: C04B

Abstract:
A refractory composition comprising from about 60 to 90 weight percent of a refractory aggregate wherein said refractory aggregate comprises a magnesium oxide, from about 2 to 25 weight percent of an ultrafine refractory material having an average particle diameter size less than or equal to about 3 microns, from about 0.5 to 15 weight percent of a binder wherein said binder comprises pitch, and from about 0.05 to 2.0 weight percent of a dispersant wherein said dispersant comprises an anionic dispersing agent, wherein all or a portion of said ultrafine refractory material comprises a thermal black such that said refractory composition comprises from about 2 to 15 weight percent of said thermal black.