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high alumina brickindex item high-alumina brick for hot stovelow-creep series high-alumina bricksRL-65RL-55LDRL-150LDRL-150LDRL-145LDRL-140LDRL-135LDRL-130AL2O3% ≥6555757565656560refractoriness 0C ≥ 179017701790179018001850185018500.2MParefractoriness under load 0C ≥ 15001470155015501500150015001480linear change after heating %(15000C×2h) +0.1 -0.4 +0.1 -0.4 ±0.2±0.2±0.2±0.2±0.2±0.2apparent porosity % ≤ 2424202119232323cold crushing strength MPa ≥ 4944.1606060504545creep rate(0.2MPa×50h)% ≤ 15500C15000C14500C14000C13500C13000C0.40.40.40.40.40.40.60.60.60.60.60.60.80.80.80.80.80.8 index item andalusite brickAL2O3-SiC-C brickcompound brown corundum brickLHZ-65LHZ-60LHZ-55LHZ-50andalusite SiC-C bauxite SiC-C corundum SiC-C AL2O3% ≥6560555050706575Fe2O3% ≤10101.21.2SiC% 88510C% ≥1010150.2MPa refractoriness under load 0C ≥16501600160015801700linear change after heating % (15000C×2h)0 +0.3 0 +0.3 +0.2+0.20 +1.0 -0.1 +0.4 0 +1.2 ±0.2(16000C×2h)±0.3apparent porosity% ≤1919191917.016.515.518cold crushing strengthMPa ≥50505050405055100bulk density g/cm3 ≥2.602.502.502.402.652.752.903.0 index item mullite brickhigh-purity mullite bricksillimanite-mullite brickcorundum-mullite brickAL2O3% ≥7075607580Fe2O3% ≤0.80.81.50.8refractoriness 0C ≥ 17901790179017900.2MParefractoriness under load 0C ≥ 1650168016501700linear change after heating % 0+0.4(15000C×2h)0+0.5(15000C×3h)apparent porosity % ≤ 1820192218cold crushing strength MPa ≥ 60806060120bulk density g/cm3 ≥ 2.52.62.42.823.0cold bending strength MPa ≥ 825thermal shock resistance (11000C-water) times ≥ 5020index item high alumina bricks for blast furnaceAL2O3-C brick for blast furnaceGL-55GL-65GL-75unburnt AL2O3-C brickAL2O3-C brickAL2O3% ≥5565766060Fe2O3% ≤2.02.02.01.51.5C% ≥1212refractoriness0C ≥1770179017900.2MPa refractoriness under load 0C ≥14801500152016501650linear change after heating %(15000C×2h)0-0.20-0.20-0.2±0.2±0.2apparent porosity % ≤1919191018cold crushing strength MPa ≥49.058.8704060