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Chromium zirconium corundum brick
Chromium zirconium corundum brick
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Product Description

  Product Overview:

     High alumina bricks are products made by calcining high alumina bauxite clinker and binder, first going through granulation and powder making processes, mixing them in a certain proportion, pressing them into shape, and firing them at high temperatures. According to physical and chemical indicators, it is divided into five grades: LZ-80, LZ-75, LZ-65, LZ-55, and LZ-48. Mainly used in high-temperature parts of industrial kilns.


  Physical and chemical indicators:

Item Indexes
LZ-80 LZ-75 LZ-65 LZ-55 LZ-48
Al2O3        %          ≥ 80 75 65 55 48
Apparent porosity      %            ≤ 21 24 24 22 22
Ambient compression strength     Mpa       ≥ 70 60 50 45 40
0.2MPa load softening starting temperature  ℃   ≥ 1530 1520 1500 1450 1420
Changes in heating permanent line          % 1500℃×2h -0.4~+0.2 1450℃×2h -0.4~+0.1