Silica Insulation Brick

Silica insulation brick is a kind of lightweight silica bricks with silica as the main raw material. Kerui Refractory offers a wide selection of high-quality standard and customized silica insulation bricks to meet the diverse needs of our customers. We maintain a comprehensive inventory of standard bricks for immediate shipment. And we can also produce customized bricks tailored to your specific application requirements based on your detailed drawings.

  • SiO2: ≥91%;
  • Bulk Density: 1.0-1.2g/cm³;
  • Cold Crushing Strength: 3.5MPa;
  • Refractoriness Under Load: 1480-1560ºC;
  • Thermal Conductivity Coefficient ≤0.55-0.70W/(m·K);
  • Permanent Linear Change On Reheating: ≤0.5ºC.
Great Thermal Mechanical Strength
Strong Acid Slag Erosion Resistance
Good Thermal Stability
Lower Thermal Conductivity
Lightweight and Energy-saving
Silica Insulation Brick - Kerui Refractory

Parameters of Kerui Silica Insulation Brick

ω (SiO2) ≥/%91919191
Bulk Density ≥/(g/cm³)1.00 1.10 1.151.20
Cold Crushing Strength ≥/MPa2.0 3.0 5.0 5.0
Permanent Linear Change On Reheating ≤/℃1500℃, 2h//0.50.5
1450℃, 2h0.50.5//
0.1MPa Refractoriness Underload ≥/℃1400142015001520
Thermal Conductivity Coefficient ≤/[W/(m·K)]
(Average Temperature 350±10℃)
0.550.60 0.650.70

Introduction of Silica Insulation Brick

Silica insulation bricks are lightweight and heat-efficient refractory products with a silica dioxide (SiO2) content exceeding 91%. It is also known as silica heat-insulating bricks or silica insulating refractories. They are primarily composed of mineral particles such as quartz, tridymite, and cristobalite. Silica insulation bricks are typically manufactured using the burnout method or the foaming method.

Advantages of Kerui Silica Insulation Brick

  • High refractoriness: Silica insulation bricks exhibit high refractoriness. Its load softening temperature ranges from 1400 to 1550 °C. This characteristic makes them suitable for applications in high-temperature environments.
  • Low thermal conductivity: Bricks possess low thermal conductivity, typically between 0.55 and 0.70 W/(m·K). Its insulation effet is better than high alumina insulation bricks. This low thermal conductivity contributes to their excellent thermal insulation properties.
  • Lightweight: Silica insulation bricks have a low bulk density, ranging from 1.00 to 1.20 g/cm³. Their lightweight nature facilitates transportation and installation.
  • High strength: They demonstrate high compressive strength. Its compressive strength surpasses the mechanical performance of other clay insulation bricks.
  • Resistance to acidic chemical corrosion: The silica dioxide content in silica insulation bricks provides resistance to the corrosive effects of acidic chemical media.

Good Properties of Kerui Silica Insulation Bricks

Applications of Kerui Silica Insulation Brick

  • Steelmaking and metallurgy industry: Hot blast stoves for air preheating, high-temperature blast furnaces, roof of steel rolling heating furnaces, etc.
  • Construction materials industry: Glass furnace crowns, lining of tunnel kilns for ceramics, lining of shuttle kilns, thermal insulation layers for buildings, etc.
  • Chemical industry: Coke oven insulation layers, walls and domes of hot blast stoves, chemical reactors, etc.
  • Power industry: Boiler insulation layers, chimneys, etc.