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High Alumina Insulation Brick

High alumina insulation brick has an alumina content of 48% or more, Which is a refractory product having a porous structure mainly composed of mullite and a glass phase, or a corundum phase and a glass phase. High alumina insulation bricks made from industrial alumina and high alumina bauxite have a refractoriness up to 1800 ° C and a maximum temperature of 1 650 ° C.


High Alumina Insulation Brick

1.High compressive strength
2.Good thermal shock resistance
3.High thermal efficiency of the furnace
4.Heat capacity reduction of the furnace wall

Application Of High Alumina Insulation Brick

High alumina insulation brick can be used as furnace lining in hot blast stove, ceramic roller kiln,metallurgical soaking furnace, petrochemical reforming furnace, thermal insulation equipment and etc.

items LG-1.2 LG-1.0 LG-0.9 LG-0.8 LG-0.7 LG-0.6 LG-0.5
Al2O3,%                   ≥ 48
Fe2O3,%                   ≤ 2.0
Bulk Density(g/cm3)         ≤ 1.2 1.0 0.9 0.8 0.7 0.6 0.5
Cold Crushing Strength Mpa        ≥ 5 3.92 3.43 2.94 2.45 1.96 1.47
Thermal Conductivity (350℃)W/m.K  ≤ 0.55 0.5 0.45 0.35 0.35 0.30 0.25
Temp reheating shrinkage less than 2.0% ℃ 1400 1400 1400 1400 1350 1350 1250

high alumina insulation brick4

high alumina insulation brick5

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