GOOD REFRACTORINESS GOOD REFRACTORINESS UNDER LOAD TECHNICAL DATA ItemHigh alumina brickLZ-55LZ-65LZ-75Chemical composition Al2O3, %≥55≥65≥75Fe2O3, % ≤1.8≤1.6≤1.5Bulk density, g/cm32.352.52.65Refractoriness, °C ≥1770≥1790≥1790Refractoriness under load, °C , (0.2Mpa 0.6%) ≥1420≥1470≥1520Apparent porosity, %≤23≤23≤22 SK-34,SK-36 HIGH ALUMINA BRICK