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China Mullite Insulation Brick Suppliers - Energy-Saving Refractory Solutions from a Leading 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 | |||||||
| JM23 | JM26 | JM28 | |||||
| 42 | 42 | 45 | 45 | 55 | 55 | 60 | 60 |
| 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| 0.5 | 0.6 | 0.8 | 1.0 | 0.8 | 1.0 | 1.0 | 1.2 |
| 1.0 | 1.5 | 1.8 | 2.5 | 2.0 | 2.5 | 2.5 | 3.0 |
| 1260 | 1260 | 1300 | 1300 | 1400 | 1400 | 1450 | 1450 |
| 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| ≤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
Q
What is the maximum service temperature of mullite insulation bricks?
Mullite insulation bricks are available in different grades. Our JM28 series can withstand service temperatures up to 1450℃, while high-temperature grades used in glass melting furnaces can sustain temperatures above 1500℃, making them suitable for a wide range of extreme industrial applications.
Q
What is the thermal conductivity of your mullite insulation bricks?
Our mullite insulation bricks feature a thermal conductivity as low as 0.15 W/(m·k) at 400℃. This exceptionally low value is achieved through a uniform internal microporous structure that effectively blocks high-temperature heat conduction, significantly reducing furnace heat loss and energy consumption.
Q
What industries are mullite insulation bricks suitable for?
Mullite insulation bricks are widely used across multiple industries including metallurgy (blast furnace hot blast stoves, sinter cooling equipment), ceramics and building materials (tunnel kilns, roller kilns, shuttle kilns), glass manufacturing (melting furnaces, annealing furnaces), and petrochemical sectors (residual oil gasifiers, carbon black reactors, ammonia synthesis reformers).
Q
Are mullite insulation bricks environmentally friendly and safe?
Yes. Our mullite insulation bricks are produced from natural mineral raw materials and emit no harmful components during use. They 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.
Q
What Al₂O₃ content do your mullite insulation bricks contain?
Our mullite insulation bricks contain between 37% and 77% Al₂O₃ depending on the grade. Impurities such as Fe₂O₃ and K₂O are strictly controlled to ensure high chemical stability, excellent resistance to acidic and alkaline media erosion, and consistent performance even in reducing atmospheres.
Q
How do mullite insulation bricks help reduce energy costs in industrial kilns?
The uniform microporous internal structure of mullite insulation bricks significantly reduces heat loss through furnace walls. This energy-saving effect is especially pronounced in intermittent operation kilns, where rapid heating and cooling cycles are common. By minimizing heat dissipation, these bricks help lower fuel consumption, reduce operating costs, and improve overall production efficiency.