Cement of chromium,zirconium,and ramming material,castable material AL2O3% ZrO2% Cr2O3% Bulk density g/cm3 refractoriness ℃ Mpa cold compressive strength Moisture water Cement of chromium corundum ramming material ≥85 ≥8 ≥3.0 ≥1790 110℃?4h ≥35 3～5 Cement of chromium corundum castable material ≥85 ≥8 ≥3.0 ≥1790 110℃?4h ≥45 5～7 Cement of zirconium corundum ramming material ≥45 ≥30 ≥3.0 ≥1790 110℃?4h ≥35 3～5 Cement of zirconium corundum castable material ≥45 ≥30 ≥3.0 ≥1790 110℃?4h ≥45 3～7 Silicon-aluminum,zirconium-aluminum products series AL2O3% Fe2O3% Apparent ponosity % Bukl density g/cm3 MPa Cold compressive strength initial softing point under load Combined antistripping high alumina brick phosphate ≥75 ≤1.2 ≤22 ≥2.55 ≥60 ≥1550 Silicon line stone brick ≥65 ≤0.5 ≤18 ≥2.45 ≥60 ≥1600 Mullite brick ≥70 ≤0.5 ≤18 ≥2.55 ≥70 ≥1650 Corundum-mullite brick ≥80 ≤0.5 ≤18 ≥2.65 ≥80 ≥1650 Agglutination corundum brick 90 ≥90 ≤0.5 ≤18 ≥3.0 ≥90 ≥1700 Agglutination corundum brick 95 ≥95 ≤0.5 ≤18 ≥3.0 ≥90 ≥1700 Zirconium corundum brick ≥60 ZrO2 ≥20 ≤22 ≥3.0 ≥75 ≥1600 Chromium corundum brick ≥90 Cr2O3 ≥4 ≤20 ≥3.0 ≥75 ≥1600 purpose Widely used in high temperature kiln-furnace as metallurgy, chemical industry,electron,glass and so on Corborundum and compound product SiC % AL2O3% Apparent rate % Bulk density g/cm3 Initial softening point under load Cold compressive strength MPa Carbonrundum product ≥75 - ≤21 ≥2.40 ≥1520 ≥70 Mullite combined with silicon product ≥60 ≥8 ≤20 ≥2.40 ≥1520 ≥80 Corundum silicon carbide product ≥60 ≥30 ≤20 ≥2.50 ≥1530 ≥90 High aluminum silicon carbide product ≥30 ≥40 ≤22 ≥2.45 ≥1500 ≥50 Carbon sillimanite brick product ≥30 ≥45 ≤22 ≥2.50 ≥1500 ≥60 Cellular corundum carbonrundum slideway ≥10 ≥80 ≤22 ≥2.90 ≥1600 ≥85 Silicon nitride combined with carborundum brick ≥72 Si3N4≥15 ≤17 ≥2.60 ≥1550 ≥100 purpose Used for color metallurgy,porcelain and ceramics industry,cement rotary kiln mouth,and high temperature of glass annealing ovean and all kinds of furnace