Hign Alumina Refractory Brick

Refractory Brick Features 1.High slag Resistance 2.Excellent Corrosion Resistance 3.Good thermal shock resistance Refractory Brick Characteristic: low thermal conductivity Light weight and easy construction excelent thermal shock resistance Refractory Brick Applications: 1) Lining of hot-surface of industrial furnaces as carbon furnace, cracking furnace, heating furnace for oil heater, roller kiln, tunnel kiln 2) Back lining insulating layer of industrial furnace as glass tank 3) Reducing atmosphere furnace High Alumina Brick HA-60ItemStandardAl2O3(%)≥60SIO2(%)32Fe2O3(%)≤1.7Na2O+K2O(%)<2.3Refractoriness1790refractoriness under load 0.2mpa(°C)1450Porosity(%)22Bulk density(g/cm3)2.33Cold cushing strength (mpa)≥50Thermal expansion at 1000°C(%)≤0.3Reheating shrinkingchange(%) 1500°CX24h-0.3High Alumina Brick HA-70ItemStandardAl2O3(%)≥70SIO2(%)22Fe2O3(%)≤2.0Na2O+K2O(%)<2.0Refractoriness>1770refractoriness under load 0.2mpa(°C)>1510Porosity(%)<22Bulk density(g/cm3)2.43-2.48Cold cushing strength (mpa)≥50Thermal expansion at 1000°C(%)≤0.3Reheating shrinkingchange(%) 1500°CX24h-0.3High Alumina Brick HA-75ItemStandardAl2O3(%)≥75SIO2(%)20Fe2O3(%)≤1.8Na2O+K2O(%)<1.2Refractoriness>1790refractoriness under load 0.2mpa(°C)>1520Porosity(%)<21Bulk density(g/cm3)2.45-2.55Cold cushing strength (mpa)≥54Thermal shock resistant at 1100C(water)>10Thermal expansion at 1000°C(%)≤0.3Reheating shrinkingchange(%) 1500°CX24h-0.3High Alumina Brick HA-80ItemStandardAl2O3(%)78-80SIO2(%)≥18Fe2O3(%)≤1.8Refractoriness≥1790refractoriness under load 0.2mpa(°C)≥1520Porosity(%)20Bulk density(g/cm3)2.55Cold cushing strength (mpa)≥60Thermal expansion at 1000°C(%)≤0.3Reheating shrinking change(%) 1500°CX24h-0.3