Hign Alumina Brick Refractory Brick

High Alumina Brick. Al2O3: 45% 85%. Bulk density: 2.15 2.8%. Porosity: below 23%. Cold crushing strength: 35 80Mpa. High alumina brick with the following specifications: Item:LZ-85LZ-80LZ-75LZ-65LZ-55LZ-48Al2O3 %≥85≥80≥75≥65≥55≥48Apparent porosity %≤23≤22≤23≤23≤22≤22Cold crushing strength Mpa≥55≥55≥53.9≥49≥44.1≥39.2Refractoriness °c≥1790≥1790≥1790≥1790≥1770≥1750Refractoriness under loadin 0.2MPa≥1550≥1530≥1520≥1500≥1450≥1420Permanent linear change1500°c×2h-0.4 0.1-0.4 0.1-0.4 +0.1-0.4 0.1-0.4 0.11450°c×2h-0.4 0.1 High alumina brickrefractoriness under load is normally around 1420 1550°Cwhichis higher than fireclay brick and it increases along with the AL2O3 content increase. High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation. High alumina brickis mainlyusedin industry furnaces such as Blast furnace, hot-blast furnace and EAF etc.