High Al brick

High Alumina Brick have good thermal stability, vibration, alkali corrosion suitable for hanging load skin softening temperature of the kiln BrandMLHA-80a MLHA-75a MLHA-65a ApplicationSteel-smelting Electric Furnace RoofAl2O3 (%) ≥80≥75≥65Refractoriness()≥1790≥1790≥1790Refractoriness under Load 0.2 Mpa()≥1550≥1530≥1520Reheat Linear Change1550 x 2h(%)0.0 /- 0.30.0 /- 0.4---1500 x 2h(%)------0.0/- 0.4Apparent PorosityFurnace-top(%)≤19≤19≤22Arch-type(%) ≤21≤21≤23Cold Crushing Strength (Mpa) ≥78.5≥68.6≥58.8This products are made from bauxite of super quality,bonding chamotte adn additives.The advantages of these products are high refractoriness ,anti alkaline /acid erosion ,good strength under high strength and thermal shock resistances.They are widely accepted in thermal equipment of metallurgic ,petroleum,contruction materials ,machinery and millitaries et. BrandMLHA-65c MLHA-55 MLHA-48 ApplicationHot Stove OvenAl2O3(%)≥65≥55≥48Refractoriness()≥1790≥1770≥17500.2 Mpa Load Softening Point()≥1500≥1470≥1420Reheat Linear Change1550 2h(%)+0.1/ - 0.4+0.1/ - 0.4---1450 2h(%)------+0.1/ - 0.4Apparent Porosity(%)≤24≤24≤24Cold Crushing Strength(Mpa)≥49.0≥44.1≥39.2