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Energy-Saving Mullite Insulation Brick from China Suppliers and Factory for High-Temperature Applications
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 your mullite insulation bricks?
Our mullite insulation bricks are available in grades JM23, JM26, and JM28, with maximum service temperatures ranging from 1260℃ to 1450℃ depending on the grade selected. The JM28 grade supports continuous use at up to 1450℃, making it suitable for the most demanding high-temperature industrial applications including glass melting furnaces.
Q
What Al₂O₃ content do your mullite insulation bricks contain?
Our mullite insulation bricks contain between 37% and 77% Al₂O₃, with strict control over impurities such as Fe₂O₃ and K₂O. This composition ensures outstanding corrosion resistance against both acidic and alkaline media, as well as stable performance in reducing atmospheres.
Q
What is the thermal conductivity of your mullite insulation bricks?
The thermal conductivity of our mullite insulation bricks is as low as 0.15 W/(m·k) at 400℃, achieved through a uniform internal microporous structure. This exceptionally low conductivity significantly reduces furnace heat loss and lowers energy consumption, especially in intermittent-operation kilns.
Q
Which 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 processing (residual oil gasifiers, carbon black reactors, ammonia synthesis reformers).
Q
Are your mullite insulation bricks environmentally friendly and safe to use?
Yes. Our mullite insulation bricks are produced from natural mineral raw materials and emit no harmful components during use, fully complying with global environmental protection standards. Their lightweight design, with a bulk density of 0.5–1.35 g/cm³, also reduces structural load on furnace equipment, ensuring long-term safe and reliable operation.
Q
Can mullite insulation bricks withstand thermal shock in intermittent-operation kilns?
Absolutely. Our mullite insulation bricks are specifically engineered to endure repeated thermal cycling. In metallurgical applications, they withstand repeated temperature shocks between 800℃ and 1200℃ with wear resistance 1.5 times that of ordinary castables. Their stable microporous structure prevents cracking and spalling, extending service life and reducing maintenance frequency.