Technical performance comparison This product granularity (mm) 1-5 bulk specific gravity (Kg/m3) 60-70 thermal conductivity (w/m.k) 0.028-0.037 water-absorptivity 200%-300% the tube presses the intensity (1Mpa pressure volume loss factor) 38%-50% refractoriness 1280-1360¡æ application temperature 800¡æ below