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High-Quality Mullite Insulation Brick from China Suppliers - Factory Direct with Precision Machined Shapes
Features
1. High Temperature Resistance
Mullite bricks can withstand very high temperatures, typically ranging from 1000°C to 1650°C, making them suitable for use in various high-temperature furnaces and kilns.
2. Low Thermal Conductivity
Low thermal conductivity helps in minimizing heat loss and improving energy efficiency in industrial applications.
3. Good Chemical Stability
Mullite bricks are resistant to chemical attack and corrosion, which enhances their durability in harsh environments.
4. High Compressive Strength
They possess high compressive strength, which allows them to maintain structural integrity under heavy loads and high temperatures.
5. Low Thermal Expansion
Mullite insulating bricks exhibit low thermal expansion, reducing the risk of cracking and spalling under temperature fluctuations.
6. Lightweight
These bricks are lightweight, which makes them easier to handle and install while also reducing the overall weight load on structures.
7. Accurate Dimensions
They are manufactured to precise dimensions, ensuring a tight fit and minimizing gaps in insulation, which further improves thermal efficiency.
8. Applications
Mullite insulating bricks are widely used in the lining of cracking furnaces, hot blast furnaces, ceramic kilns, electric furnaces, and other high-temperature industrial furnaces.
These features make mullite insulating bricks a preferred choice in industries requiring robust and efficient thermal insulation solutions.
Typical Application
- Glass furnace sidewall and bottom insulation, port insulation, tin bath roof, etc.
- Ceramics roller kiln, tunnel kiln, pusher kiln, etc.
- Other industrial furnaces where less mortar joint is required.
Typical Indexes
| Item | Unit | FJM23 | FJM26 | FJM28 | FJM25-1350 |
|---|---|---|---|---|---|
| Classification Temperature | ℃ | 1260 | 1430 | 1540 | 1350 |
| Bulk Density | Kg/m³ | 650 | 800 | 900 | 1250 |
| Cold Crushing Strength | MPa | 1.3 | 2.5 | 2.8 | ≥ 6 |
| Modules of Rupture | MPa | 1 | 1.4 | 1.7 | -- |
| Reheating Linear Change (℃ × 12h) | % | -0.2 (at 1230℃) | -0.3 (at 1400℃) | -0.5 (at 1500℃) | -0.5 (at 1350℃) |
| Thermal Conductivity @350 ± 10℃ | W/m·K | 0.18 | 0.24 | 0.3 | 0.54 @600℃ |
| Al2O3 | % | 42 | 55 | 65 | 52 |
| Fe2O3 | % | 0.8 | 0.8 | 0.6 | 2 |
All data above are average test results under standard procedure and are subjected to variation. Result should not be used for specification purpose or creating any contractual obligation. For more information on the safety application or materials, please contact with our sales engineer.
Frequently Asked Questions
What temperature range can Mullite insulating bricks withstand?
Mullite insulating bricks are designed for high-temperature stability, typically withstanding temperatures ranging from 1000°C up to 1650°C, depending on the specific model grade (e.g., FJM23, FJM26, or FJM28).
How do Mullite bricks help in energy saving?
Due to their low thermal conductivity, these bricks effectively minimize heat transfer and loss through furnace walls, significantly improving thermal efficiency and reducing fuel consumption in industrial furnaces.
What are the primary applications of Mullite insulating bricks?
They are widely utilized in glass furnace sidewalls and bottom insulation, ceramic roller kilns, tunnel kilns, cracking furnaces, hot blast furnaces, electric furnaces, and other high-temperature industrial heating equipment.
Why is low thermal expansion important for Mullite bricks?
Low thermal expansion ensures that the bricks undergo minimal dimensional changes during heating and cooling cycles. This property drastically reduces the risk of structural cracking, spalling, and deformation.
What is the difference in Al2O3 content among FJM models?
The Al2O3 content varies to suit different thermal requirements: FJM23 contains 42% Al2O3, FJM26 contains 55%, FJM28 contains 65%, and FJM25-1350 contains 52%. Higher alumina content generally yields higher temperature resistance.