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Energy-Saving Mullite Insulation Brick from China Suppliers | High-Quality Refractory Factory
Core Advantages
Outstanding Energy Conservation & Insulation, Significant Cost Reduction & Efficiency Boost
With a thermal conductivity as low as 0.15 W/(m·k) (at 400℃), our mullite insulation brick features a uniform internal microporous structure that efficiently blocks high-temperature conduction, reducing furnace heat loss. This energy-saving performance is particularly prominent in intermittent operation kilns, greatly enhancing overall production efficiency.
Exceptional High-Temperature & Corrosion Resistance, Versatile for Harsh Working Conditions
Containing 37%-77% Al₂O₃ and strictly controlling impurities like Fe₂O₃ and K₂O, it withstands erosion from acidic and alkaline media and maintains stable performance even in reducing atmospheres, making it ideal for various harsh high-temperature industrial environments.
Green & Eco-Friendly, Safe & Reliable Performance
Produced from natural mineral raw materials, our mullite insulation brick emits no harmful components and complies with global environmental protection standards. Its lightweight design (bulk density 0.5-1.35 g/cm³) reduces furnace load, avoids structural overload risks, and ensures safe, continuous equipment operation.
Product Parameters
| Mullite Insulation Brick | ||||||||
| Parameter | JM23 | JM23 (Alt.) | JM26 | JM28 | ||||
| Grade | 42 | 42 | 45 | 45 | 55 | 55 | 60 | 60 |
| Permanent Linear Change (%) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Bulk Density (g/cm³) | 0.5 | 0.6 | 0.8 | 1.0 | 0.8 | 1.0 | 1.0 | 1.2 |
| Cold Crushing Strength (MPa) | 1.0 | 1.5 | 1.8 | 2.5 | 2.0 | 2.5 | 2.5 | 3.0 |
| Max. Service Temp. (℃) | 1260 | 1260 | 1300 | 1300 | 1400 | 1400 | 1450 | 1450 |
| Reheating Linear Change (%) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Thermal Conductivity W/(m·k) | ≤0.16 | ≤0.20 | 0.25 | 0.30 | 0.25 | 0.30 | 0.30 | 0.45 |
Detailed Application Scenarios
1
Metallurgy Industry
◎ Our mullite insulation brick is perfectly suited for blast furnace hot blast stoves, circular cooler trolleys, sinter cooling equipment, and more. It endures repeated 800-1200℃ temperature shocks, with wear resistance 1.5 times that of ordinary castables. It reduces heat conduction in trolley steel structures and improves cooling efficiency by 5%-8% for enhanced metallurgical production efficiency.
2
Ceramics & Building Materials Industry
◎ Ideal for linings and insulation layers of ceramic tunnel kilns, roller kilns, and shuttle kilns, our mullite insulation brick precisely controls furnace temperature uniformity, minimizes heat loss, and facilitates uniform sintering of ceramic green bodies. It extends kiln service life and reduces maintenance frequency, cutting operational costs for ceramic and building materials enterprises.
3
Glass Industry
◎ Used in insulation structures of glass melting furnaces and annealing furnaces, our high-temperature mullite insulation brick withstands temperatures above 1500℃ and exhibits strong chemical stability. It resists glass slag erosion, prevents lining peeling from contaminating glass liquid, and ensures consistent glass product quality.
4
Petrochemical Industry
◎ Our mullite insulation brick is applicable to residual oil gasifiers, ammonia synthesis secondary reformers, carbon black reactors, and other petrochemical equipment. It endures high temperatures, high pressures, and corrosive gases, delivering excellent sealing and insulation effects to ensure continuous, safe equipment operation and reduce potential safety hazards.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
What is the maximum service temperature of your mullite insulation brick?
Our mullite insulation brick is available in multiple grades. The JM23 grade supports up to 1260℃, JM26 up to 1400℃, and JM28 up to 1450℃. For glass melting furnace applications, our high-temperature variants can withstand temperatures above 1500℃, making them suitable for the most demanding industrial environments.
What is the thermal conductivity of your mullite insulation brick?
The thermal conductivity of our mullite insulation brick is as low as 0.15 W/(m·k) at 400℃. Depending on the grade and bulk density, values range from ≤0.16 to 0.45 W/(m·k), providing outstanding insulation performance and significantly reducing furnace heat loss.
Which industries are mullite insulation bricks most suitable for?
Mullite insulation bricks are widely used across metallurgy, ceramics and building materials, glass, and petrochemical industries. They are ideal for blast furnace hot blast stoves, ceramic tunnel kilns, glass melting furnaces, residual oil gasifiers, and many other high-temperature industrial applications requiring reliable insulation and corrosion resistance.
Are your mullite insulation bricks environmentally friendly?
Yes. Our mullite insulation bricks are produced from natural mineral raw materials and emit no harmful components during use. They fully comply with global environmental protection standards. The lightweight design (bulk density 0.5–1.35 g/cm³) also reduces structural load on furnaces, contributing to safer and more sustainable industrial operations.
Can mullite insulation bricks resist both acidic and alkaline corrosion?
Absolutely. With an Al₂O₃ content of 37%–77% and strictly controlled impurities such as Fe₂O₃ and K₂O, our mullite insulation bricks exhibit excellent resistance to erosion from both acidic and alkaline media. They also maintain stable performance in reducing atmospheres, making them versatile for a wide range of harsh chemical environments.
How do mullite insulation bricks improve energy efficiency in kilns?
The uniform internal microporous structure of our mullite insulation bricks effectively blocks high-temperature heat conduction, minimizing heat loss through furnace walls. This energy-saving effect is especially significant in intermittent operation kilns, where rapid heating and cooling cycles are frequent. The result is reduced fuel consumption, lower operating costs, and improved overall production efficiency.