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China Suppliers - Hengli Mullite Insulation Brick Factory for High-Quality, Precision-Engineered Insulation Blocks
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 |
|---|---|---|---|---|---|
| Classfication 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 ℃X12h | % | -0.2 | -0.3 | -0.5 | -0.5 |
| 1230 | 1400 | 1500 | 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 (FAQ)
What is the maximum service temperature of Mullite Insulating Bricks?
Mullite insulating bricks can typically withstand high operating temperatures ranging from 1000°C up to 1650°C, depending on the specific classification grade (such as FJM23, FJM26, or FJM28).
How do Mullite bricks help in saving energy?
Due to their low thermal conductivity, these bricks minimize heat loss through the furnace walls. This excellent thermal insulation capacity significantly improves energy efficiency and reduces fuel consumption in industrial applications.
What are the benefits of the low thermal expansion in Mullite bricks?
Low thermal expansion reduces the risk of structural cracking, spalling, and deformation when the bricks are subjected to rapid temperature fluctuations, ensuring long-term structural stability.
Where are Mullite insulating bricks commonly applied?
They are widely used in glass furnace sidewalls and bottoms, ceramic roller kilns, tunnel kilns, cracking furnaces, hot blast furnaces, and other high-temperature industrial linings where precision insulation is required.
Why is accurate dimensional tolerance important for these bricks?
Precise dimensions ensure a tight fit during installation, which minimizes mortar joints and gaps. This tight construction prevents heat leakage and further enhances the thermal efficiency of the furnace lining.