high thermal shock pure andalusite brick

high thermal shock pure andalusite brick: Mainly used in the combined bricks, arch roof and straight section of the hot-blast outlet. 1. ISO9001-2008 2. our patent products 3. high refractoriness under load index: Al2O3 % ≥60Fe2O3 % ≤0.8TiO2 % ≤0.5K2O+Na2O % ≤0.6Impurity % ≤0.7Base+impurity ≤1.2Apparent porosity % ≤20(22)Mpa ≥40(30)Bulk density g/cm3 ≥2.40(2.35)0.2Mpa refractory under load °C0.5%≥14702.0%≥1580Cold bending strength Mpa ≥15Reheating linear change %, 1500°Cx4h ±0.2Creeping, % 1450°C/20-50h/0.2Mpa ≤0.2Thermal stability 1100°C,water cooling ,times ≥20