Application: Burning zone, preheating zone and kiln hood of cement rotary kiln. Middle-temperature zone of regenerator of glass tank. Typical technical specification: 1)AL2O3: Min75% 2)MGO: Min10% 3)Bulk density: Min2.85g/cm3 4)Apparent porosity: Max20% 5)Cold crushing strength: Min48MPa 6)0.20MPa RUL: Min1550C