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Spalling-Resistant High Alumina Bricks

Anti-spalling high alumina brick production using high bauxite as the main raw material, the introduction of a small amount of ZrO2 (because ZrO2 is a monoclinal and quadrangular phase change, can improve the thermal shock stability of the product), adding a certain amount of composite binder and additives.
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  • Description

  • Anti-spalling high alumina brick production using high bauxite as the main raw material, the introduction of a small amount of ZrO2 (because ZrO2 is a monoclinal and quadrangular phase change, can improve the thermal shock stability of the product), adding a certain amount of composite binder and additives, by controlling the size of the mud, by molding and high temperature fired refractory products, known as anti-spalling high alumina brick. The traditional high aluminum brick is a kind of refractory material, the main component of this refractory brick is Al2O3.


    Product category


    The physical and chemical indexes of anti-spalling high-alumina bricks mainly involve the content of aluminum oxide, bulk density, apparent porosity, compressive strength at normal temperature, softening temperature under load, thermal shock stability and other indexes, which are divided into two categories according to chemical composition. One is anti-spalling high-alumina brick containing ZrO2, model GKBL-70. The other type is ZRO2-free anti-spalling high aluminum brick, model KBL-70.


    Product characteristics


    (1) High fire resistance temperature; (2) 0.2MPA load softening temperature greater than 1450 degrees; (3) Excellent thermal shock resistance, 1100 degrees water cooling more than 15 times; (4) High compressive strength at room temperature, greater than 70MPA; (5) Low apparent porosity and stable volume at high temperature; (6) Excellent spalling resistance; (7) Good resistance to chemical erosion.


    Anti-spalling high aluminum brick price


    The price of anti-spalling high aluminum brick is higher than that of ordinary high aluminum brick, and it is cheaper than silicon Mo brick.


    Product application


    High aluminum brick has strong resistance to falling off, high fire resistance, good cracking resistance and corrosion resistance, but also has resistance to potassium, sodium, sulfur, chlorine and alkaline salt corrosion, low thermal conductivity and other properties, is the ideal material for cement kiln transition zone and decomposition zone, can also be used in cement kiln door cover, cooling machine and other parts. For now, high alumina bricks are mainly used in cement kilns.

    General Properties

        Standard
    Chemical Analysis Al2O3 ≥70%
    Fe2O3 ≤1.5%

    Physical Properties

      

    Item Unit Standard
    Apparent Porosity  % ≤24
    Bulk Density   g/cm³ ≥2.50
    Cold Crushing Strength  MPa ≥70

    Refractoriness Under load T0.2

    		℃ ≥1450
    Thermal Shock Resistance （1100℃water cooling） cycles ≥15

Keywords：

Spalling-Resistant High Alumina Bricks

Cement

Refractory materials

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