Silica Refractory Bricks For Coke Oven

Silica Refractory Bricks For Coke Oven Physical And Chemical Indicators ItemsNumerical requirementsRetest Allowed DeviationBottom,Furnace wallOtherw(SiO2)/% ≥94.5—w(Al2O3)/% ≤1.5—w(Fe2O3)/% ≤1.5—w(CaO)/% ≤2.5— Apparent Porosit/% ≤2224+1 Cold Crushing Strength/ Mpa ≥403510% Refractoriness Under Load (T0.6)/°C ≥1650-10 True Density /(g/cm3) ≤2.332.34+0.01 Residual Quartz/% ≤1—Permanent Change In The Heating (1450°C*2h)/%0 0.2— Thermal Expansion(1000°C) /%≤1.281.3+0.03 If necessary, 1200 °C ambient temperature can provide the thermal expansion curves.