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Low Creep High Alumina Bricks

The low creep high alumina brick used in hot blast furnace is mainly made of high quality bauxite, white corundum, mullite and "three stones".
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  • Description
  • The low creep high alumina brick used in hot blast furnace is mainly made of high quality bauxite, white corundum, mullite and "three stones". Combined with compound ultrafine powder and admixture. It is formed by high pressure forming and sintering at high temperature. It is mainly used for the upper masonry of the air furnace. It has the characteristics of high temperature resistance, high compressive strength, high load softening starting temperature, high temperature volume stability and excellent creep performance.

    General Properties

    Chemical Analysis Item Standard
    DRL-155 DRL-150 DRL-145 DRL-140 DRL-135
    Al2O3 ≥75% ≥75% ≥65% ≥65% ≥65%

    Physical Properties

      

    Item Unit Standard
    DRL-155 DRL-150 DRL-145 DRL-140 DRL-135
    Apparent Porosity  (%) ≤20 ≤21 ≤21 ≤22 ≤22
    Bulk Density    (g/cm³) 2.65-2.85 2.65-2.85

    2.50-2.70

    2.40-2.60 2.35-2.55
    Cold Crushing Strength   (MPa) ≥60 ≥60 ≥60 ≥55 ≥55

    Creep Rate T0.2

    %

    ≤0.8

    1500℃×50h

    ≤0.8

    1500℃×50h

    ≤0.8

    1450℃×50h

    ≤0.8

    1450℃×50h

    ≤0.8

    1350℃×50h

    Permanent Linear Change  (%)

    -0.2~0.1

    1550℃×2h

    -0.2~0.1

    1500℃×2h

    -0.2~0.1

    1500℃×2h

    -0.2~0.1

    1450℃×2h

    -0.4~0.1

    1450℃×2h

Keywords:

Steel

Low Creep High Alumina Bricks

Refractory materials

Categorie:

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