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Alumina bubble brick

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Product Description

  product Overview:

 

  Alumina bubble brick is made of alumina hollow spheres and alumina powder as the main raw materials, combined with other binders, and fired at 1750 ℃. It belongs to a kind of energy-saving and heat-preservation material of ultra-high temperature material. Mainly used in petrochemical industry gasification furnace, carbon black industrial reactor, metallurgical industry induction electric furnace and other high-temperature, ultra-high-temperature furnaces are widely used.

 

  Physical and chemical indicators:

 

Item Indicator
85 90 99
Maximum use temperature         ℃ 1680 1700 1800
Al2O3        %      ≥ 85 90 99
SiO2         %       ≤ 13 8 0.3
Fe2O3        %      ≤ 0.2 0.2 0.2
Bulk Density      g/cm³           1.4~1.7 1.4~1.7 1.4~1.7
Compressive strength at room temperature   Mpa       ≥ 12 10 9
0.1MPaLoad softening start temperature ℃  ≥ 1650 1700 1700
Reburning line change        %           ≤ 1600℃×3h
±0.3
1600℃×3h
±0.3
1600℃×3h
±0.3
Thermal Conductivity【W/(m·K)】average temperature(350±10)℃      ≤ 0.8 1.3 1.5

 

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