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China Mullite Insulation Brick Factory - Energy-Saving Refractory Solution from Top Suppliers
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
What is the maximum service temperature of mullite insulation bricks?
Our mullite insulation bricks are available in grades JM23, JM26, and JM28, with maximum service temperatures of 1260℃, 1400℃, and 1450℃ respectively. The JM28 grade is specifically designed for applications requiring sustained exposure to temperatures above 1500℃ in glass and high-temperature industrial furnaces.
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℃, with values ranging from ≤0.16 to 0.45 W/(m·k) depending on the grade and bulk density. This low thermal conductivity ensures outstanding heat insulation and significant energy savings in industrial furnace applications.
Are mullite insulation bricks suitable for corrosive or chemically aggressive environments?
Yes. Our mullite insulation bricks contain 37%-77% Al₂O₃ with strictly controlled impurity levels (Fe₂O₃, K₂O, etc.), providing strong resistance to both acidic and alkaline media erosion. They also maintain stable performance in reducing atmospheres, making them well-suited for petrochemical reactors, glass furnaces, and other chemically demanding environments.
What are the bulk density options available for mullite insulation bricks?
Mullite insulation bricks are available in bulk densities ranging from 0.5 to 1.35 g/cm³. The lightweight design helps reduce overall furnace structural load, minimizes the risk of overload on kiln frameworks, and contributes to safer long-term equipment operation without compromising thermal performance.
Which industries commonly use mullite insulation bricks?
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 processing (residual oil gasifiers, ammonia synthesis reformers, carbon black reactors).
Are mullite insulation bricks environmentally friendly and safe to use?
Absolutely. Our mullite insulation bricks are manufactured from natural mineral raw materials and emit no harmful components during use or production. They comply with global environmental protection standards, making them a safe and sustainable choice for industrial applications that require both high performance and environmental responsibility.