Patent ID: 6313056
Filing Date: 2001-11-06
Classification: C04B

Abstract:
An essentially non-slumping, high density, low moisture sprayable refractory castable composition that is applied without the use of forms comprising:(a) a tempered, pumpable first component comprising (i) 100 weight percent of a refractory composition, said refractory composition comprising from about 60 to 90 weight percent of a refractory aggregate wherein said refractory aggregate comprises a magnesia, 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, and 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, and (ii) from about 3 to 10 weight percent water based upon 100 weight percent of said refractory composition, wherein said water is present in an amount sufficient to achieve a pumpable consistency; and(b) a second component comprising a flocculating agent wherein said flocculating agent comprises an alkaline earth chloride, and wherein said second component is added to said first component for achieving installation of the sprayable refractory castable composition in an amount to prevent slumping.