Shandong Gaoha Refractories Technology Co.,Ltd.

General index Item  Mullite Bricks RF-70 High-purity Mullite Bricks  RF-75 Max Service Temperature  °C  1600 1650   Al2o3,  % ≥  70 75   SIO2, % ≤  25 23   Fe2o3,  % ≤  0.5 0.5   Bulb density, g/cm3  ≥ 2.65 2.7  Apparent porosity, %  ≤  17  17  Cold crushing strength, Mpa ≥  90 100   Refractoriness under load(0.2Mpa,0.6%),≥  1630 1700  Technical data of corundum mullite bricks for your reference Size : 230x114x64mm Specifications: The alumina content,density,size of the products can be customized according to your request. Item High purity corundum bricks DL-98 Normal  corundum  bricks DL-95 Corundum  mullite bricks DL-90 Corundum  mullite bricks DL-80 Mullite bricks DL-75 Mullite Bricks DL-70 Al2O3％≥ 98.5 95 90 80 75 70 SiO2％≤ 0.3 3.0 9.0 18 23 25 Fe2O3％≤ 0.2 0.2 0.5 0.5 0.5 0.5 Bulk Density (g/cm3 ≥) 3.0 2.9 2.9 2.7 2.7 2.65 Compressive strength at normal temperature (MPa≥) 75 100 100 60 100 90 Refractoriness (°C≥) 1790 1790 1790 1760 1700 1650 Linear Change(%)1600°C x3h ±0.2 ±0.2 ±0.2 ±0.3 ±0.3 ±0.3