... corrosion Fire-caly bricksThe main chemical components:Al2O3 content is 30%-48%, SiO2 content ... is 50%-65%, and a small number of alkali metals, alkaline earth metal oxides, ... electric power and machine building.Our refractory bricks are mainly including fireclay, magnesia, high ... Apparent porosity,%≤2224262426242628Compress strength,N/mm2≥3025202015201515Thermal shockresistanceN-2b, N-3b must be tested ...