... brick 1 High Purity:SiO2>95% 2 High RUL:T1,1670~1700 3 Super quality:A.P.<16% Smetal Smetal high quality hot blast ... for furnace top and wallchecker brickSiO2,%≥95≥95A.P. ,%≤22≤23B.D. g/cm3≤2.35≤2.35C.C.S ... . ,MPa≥35≥30Refractoriness under load ,°C:≥1600≥1600Thermal expansion , 1000°C,%≤1.26≤1.26 -Silica fire brick for coke ... %≥65≥65≥70 Al2O3%--≥19Fe2O3%--≤2.5A.P. %≤23≤22≤21B.D. g/cm3≥2.0≥2.0≥2.0CCS ...