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Corundum brick

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Product Description

  product Overview:

 

  Corundum brick is mainly made by fused white corundum, tabular corundum, super fine alumina powder through mixing them as per certain ratio, high pressure forming and burning under high-temperature. It’s a type of refractory product featuring high temperature resistance, high compression strength, high-temperature erosion resistance, scouring resistance, etc. It’s mainly used at key parts of kilns for steel, petrochemical, fertilizer, nonferrous metal, electronic and other industries.

 

  Physical and chemical indicators:

 

Item GYZ-99A GYZ-99B GYZ-98 GYZ-95
Al2O3              %            ≥ 99 99 98 95
SiO2             %           ≤ 0.15 0.20 0.50 -
Fe2O3             %           ≤ 0.10 0.15 0.20 0.30
Apparent porosity      %           ≤ 19 19 19 20
Volume density        g/cm³            ≥ 3.20 3.15 3.15 3.10
Ambient compression strength     Mpa        ≥ 80 80 80 100
Changes in heating permanent line (16000°C×3h))% -0.2~+0.2 -0.2~+0.2 -0.2~+0.2 -0.3~+0.3
load softening starting temperature(0.2Mpa,0.6%) ℃    1700 1700 1700 1700