High Alumina Insulation Brick Refractory Material
DYSen Industrial
DYSen Industrial
DYSen Industrial

High Alumina Insulation Brick DYSEN Industrial

High alumina insulation brick is a type of refractory brick that is made primarily from high-purity alumina, typically with an alumina content of 48% to 95%. These bricks are known for their excellent insulating properties, high-temperature resistance, and low thermal conductivity. They are widely used in various industrial applications where thermal insulation is critical.

  • Payment :

    In Advance
  • Product Origin :

  • Shipping Port :

    Shanghai Port
  • Lead Time :

    15 Working days

Product parameters:

Item LG-1.0 LG-0.9 LG-0.8 LG-0.7 LG-0.6
Al2O3 ≥48 ≥48 ≥48 ≥48 ≥48
Fe2O3 ≤2.0 ≤2.0 ≤2.0 ≤2.0 ≤2.0
Bulk Density (g/cm3) ≤1 ≤0.9 ≤0.8 ≤0.7 ≤0.6
Cold Crushing strength (Mpa) ≥3.92 ≥3.43 ≥2.94 ≥2.45 ≥1.96
Thermal Conductivity Coefficient (W/mk) ≤0.45 ≤0.45 ≤0.35 ≤0.35 ≤0.3
Permanent Linear Change Rate (max 2%) (℃) 1400 1400 1400 1350 1350


The key characteristics and features:

  1. Thermal Insulation: High alumina insulation bricks have low thermal conductivity, which means they can effectively reduce heat transfer through the material. This property helps to minimize heat loss, conserve energy, and maintain stable temperatures in industrial furnaces and kilns.

  2. High-Temperature Resistance: These bricks can withstand high temperatures, typically up to 1500°C (2732°F), without significant structural deformation or degradation. They are used in applications where there is exposure to extreme heat, such as in the walls and linings of furnaces, kilns, and thermal equipment.

  3. Lightweight: High alumina insulation bricks are lightweight, which makes them easier to handle and install compared to other dense refractory bricks. The reduced weight also helps to reduce the load on supporting structures.

  4. Low Heat Storage: These bricks have low heat storage capacity, meaning they can quickly absorb and release heat. This property allows for faster heat-up and cooldown times in industrial processes, improving operational efficiency.

  5. Good Thermal Shock Resistance: High alumina insulation bricks have good resistance to thermal shock, which is the ability to withstand rapid temperature changes without cracking or spalling. This property is essential in applications where there are frequent temperature fluctuations.

  6. Chemical Inertness: These bricks are chemically inert and have good resistance to chemical attack from various gases, slags, and molten metals. This makes them suitable for use in environments with corrosive atmospheres.


  • Steel and iron industry: Furnaces, ladles, tundishes, and hot metal transfer systems.
  • Ceramic industry: Kilns, ovens, and kiln cars in ceramics manufacturing.
  • Nonferrous industry: Copper converters, anode furnaces, and refining vessels.
  • Petrochemical industry: Reformers, crackers, and reaction vessels.
  • Glass industry: Glass melting furnaces, regenerators, and forehearths.
  • Power generation: Insulation in boilers, chimneys, and stacks.

Overall, high alumina insulation bricks are valued for their thermal insulation properties, high-temperature resistance, lightweight nature, and good thermal shock resistance. These characteristics make them an ideal choice for applications that require both excellent insulation and durability in high-temperature environments.

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