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High grade high alumina brick refers to the high alumina brick with Al2O3 content greater than 80%. The main raw material for the production of this product is super Calcined Bauxite, Al2O3 > 88 percent , add light calcined aluminum oxide powder, and the firing temperature is 1500 ± 10 degree . The properties of high-grade bauxite are superior to those of ordinary high alumina bricks. The fire resistance is greater than 1800 degree , the density is greater than 2.7g/cm3, the compressive strength is greater than 80MPa, and the softening temperature is greater than 1550 degree , especially the porosity is less than 19 percent . Advanced high alumina bricks have superior physical properties and are often used in key parts and high-temperature resistant areas of high-temperature kiln equipment, such as electric furnace top, ladle lining, cement kiln, petrochemical equipment, etc.