Al2O3: 42-99%
refractoriness min 1790
bulk density: 2.1-3.0
apparent porosity: 24-17%
fireclay insulation brick
high alumina insulation brick
mullite insulation brick
bulk density: 0.5-1.0 g/cm3
SiO2: 95%
for coke oven, blast furnace, glass furnace.
