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  • High Alumina Insulating Brick
  • High Alumina Insulating Brick

High Alumina Insulating Brick

  • HG-1.2 Al2O3,% : ≥48
  • HG-1.2 Fe2O3,% : ≤2.0
  • HG-1.2 Bulk Density ≤ : 1.2
  • HG-1.2 Cold Crushing Strength ≥ : 5
  • Quantities can be customized

Product details:location : Home > Products > High Alumina Brick

High alumina lightweight insulating refractory brick is a kind of insulation material adopting organic matter as ignition loss substance in order to increase the porosity of refractory, which has such advantages as high porosity, small volume density, good insulation effect, high mechanical intensity, small thermal conductivity and long service life. For various industrial kilns & furnaces, it is a kind of essential refractory for energy saving and temperature preservation.
Characterized by low bulk density, maximum service temperature is 1350C., high cold crushing strength, size precision and hold the most stable and lowest thermal conductivity of all insulating refractory bricks at present.
The total weight of the furnace body and walls thickness can be reduced effectively, thermal efficiency and working condition can be improved, energy consumption can be lowered, and productivity and significant economic results can be achieved.
Physical and chemical index  
Brand Inedx HG-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 ≤ 1.2 1.0 0.9 0.8 0.7 0.6 0.5
Cold Crushing Strength ≥ 5 3.92 3.43 2.94 2.45 1.96 1.47
(350°C)W/m.K Thermal Conductivity ≤ 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

This series of High Alumina Insulating Refractory Brick are made of selected high alumina bauxite, kaolin clay, and hollow microsphere. By shaping at high pressure and sintering at high temperature 

 By using the products widely in insulating layers of various thermal equipments for example blast furnace, hot blast furnace, coke oven and linings where no high temperatures melt corrosion occurs.

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