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China Mullite Insulation Brick Suppliers - High-Quality Factory Direct Blocks with No Mortar Joints
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 ℃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 temperature limit for Mullite insulating bricks?
Mullite insulating bricks can withstand high classification temperatures typically ranging from 1000°C up to 1650°C, depending on the specific grade (such as FJM23, FJM26, or FJM28).
How do Mullite bricks contribute to energy efficiency?
They feature low thermal conductivity (ranging from 0.18 to 0.54 W/m·K depending on the grade and temperature), which minimizes heat loss in high-temperature industrial furnaces.
What are the typical applications for these insulating bricks?
They are widely used in glass furnace sidewalls/bottoms, port insulation, tin bath roofs, ceramics roller kilns, tunnel kilns, pusher kilns, cracking furnaces, and hot blast furnaces.
Why is the low thermal expansion of Mullite bricks beneficial?
Low thermal expansion reduces structural stresses during temperature fluctuations, which significantly minimizes the risk of cracking and spalling over time.
Are Mullite insulating bricks chemically stable?
Yes, they exhibit good chemical stability, providing strong resistance to chemical attack and corrosion in harsh, high-temperature industrial environments.