High alumina insulation brick is a type of lightweight insulating bricks made with alumina as the main raw material. Its excellent fire resistance, thermal insulation performance, and light weight make it the choice for many high temperature industries. Kerui Refractory provides standard and customized bricks that meet customer requirements.
- Al2O3: ≥48%;
- Fe2O3: ≤2.0%;
- Bulk Density: 0.5-1.2g/cm³;
- Cold Crushing Strength: 1.2-4.5MPa;
- Permanent Linear Change: -2-1.0% T/ºC*12h.
Free Sample Available to Any Country
Low Volume Density
Excellent Heat Insulation
Lower Thermal Conductivity
Significant Energy Saving Effect
What is High Alumina Insulation Brick?
High alumina insulation bricks are a type of high-temperature insulation product made from high-quality alumina, clay, and other raw materials. Its main component is alumina, with a content of at least 48%. In addition, it also contains a small amount of iron oxide, calcium oxide, magnesium oxide, etc. Therefore, this insulation brick has comprehensive performance.
Parameters of Kerui High Alumina Insulation Brick
| Item/Grade | LG140-1.2 | LG140-1.0 | LG140-0.8L |
|---|---|---|---|
| Al2O3, % | ≥48 | ||
| Fe2O3, /% | ≤2 | ||
| Bulk Density, g/cm³ | ≤1.2 | ≤1 | ≤0.8 |
| Cold Crushing Strength, MPa | ≥4.5 | ≥3.5 | ≥2.5 |
| Permanent Linear Change, % (T/℃*12h) | 1400 | ||
| Thermal Conductivity Coefficient, W/(m·K) Average Temperature (350±25℃) | ≤0.55 | ≤0.50 | ≤0.35 |
Advantages of Kerui High-alumina Insulation Brick
- High refractoriness: The refractoriness of high alumina insulation bricks is generally between 1580 and 1750°C. The refractoriness is higher than that of other insulating brick. This makes them suitable for use in high temperature environments.
- Good thermal insulation performance: The thermal conductivity of high alumina insulation bricks is between 0.2 and 0.55 W/(m·K). The thermal conductivity is lower than that of clay insulation bricks and silica insulation bricks. This means that they have excellent thermal insulation properties.
- Light weight: The density of alumina insulation bricks is between 0.5 and 1.2 g/cm³. This makes them lightweight and easy to handle. It improves construction quality.
- High strength: The compressive strength of high alumina insulation bricks is between 1.0 and 2.0 MPa. This makes them strong and durable, with a long service life in high temperature mechanical applications.
- Good chemical stability: Alumina has good chemical stability. This feature helps to resist corrosion from acidic and alkaline slags.
Applications of Kerui High Alumina Insulation Brick
- Metallurgical industry: The inner lining of steelmaking furnaces, reheating furnaces, annealing furnaces, sintering furnaces, blast furnaces, converters, etc.
- Chemical industry: The insulation and lining of chemical reactors, synthesis furnaces, decomposition furnaces, coking furnaces, etc.
- Construction materials industry: Ceramic kilns, tunnel kilns, roller kilns, shuttle kilns, wall kilns, the thermal insulation and fire protection of buildings, etc.
- Power industry: The insulation and lining of boilers, chimneys, turbines, and other power plant equipment.