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Silica Insulation Brick

Silica Insulation Brick is made of quartz stone material, the content of SiO2 is approximately 91% and it has good resistance to acid slag and low heat conductivity.

Excellent fire resistance

High softening temperature under load

Good thermal stability

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Description

The silica content of siliceous insulation bricks is above 91%, and the bulk density is below 1.2g/cm3. The refractoriness and load softening temperature are not much different from ordinary silica bricks with the same composition.

Characteristic

  1. High porosity.
  2. Small volume density.
  3. Good insulation effect.
  4. High mechanical intensity.
  5. Small thermal conductivity.

Specifications

ItemQG-1.0QG-1.1QG-1.2
SiO2 (%)919191
Refractoriness °C168016801670
0.2Mpa Refractoriness Under Load °C148015601560
Cold Crushing Strength Mpa3.53.53.5
True Density g/cm32.392.392.39
Bulk Density g/cm311.11.2
Permanent Linear Change On Reheating(%)

0~+0.5

1450°C*2h

0~+0.5

1550°C*2h

0~+0.5

1550°C*2h

Thermal Conductivity (W/MK) 350°C0.550.60.65

Application

Silica Insulation Brick is suitable for coke ovens, hot blast furnaces, glass melting furnaces, carbon furnaces, etc.

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