High alumina thermal insulation brick 1)ISOCertified 2)Light Weight Mullite Brick 3)High density 4)High wear-resistance High alumina thermal insulation brick1). ... fireproofing, mine, etc5.Characteristics:high strength, high tenacity, high density, low wear, fine neat, abrasion resistance, and is the ideal grinding ... 0. 20≤0.15≤0.15≤0.15colourWhiteWhiteWhiteWhite High alumina thermal insulation brick