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Mullite Insulation Brick Suppliers in China - Energy-Saving Refractory Solution from 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 can withstand temperatures exceeding 1500℃, making them suitable for demanding high-temperature applications such as glass melting furnaces, ceramic kilns, and petrochemical reactors. Specific grades like JM28 are rated for use up to 1450℃ in continuous service.
Q
What are the available grades of mullite insulation bricks and how do they differ?
We offer three primary grades: JM23, JM26, and JM28. These grades differ in Al₂O₃ content (ranging from 37% to 77%), bulk density (0.5–1.2 g/cm³), cold crushing strength, and maximum service temperature (1260℃ to 1450℃). Higher grades offer superior temperature resistance and mechanical strength.
Q
How does the mullite insulation brick contribute to energy savings?
With a thermal conductivity as low as 0.15 W/(m·k) at 400℃ and a uniform internal microporous structure, these bricks significantly reduce furnace heat loss. This is especially effective in intermittent kilns, where rapid heat-up and cool-down cycles benefit greatly from the brick's low heat storage capacity, leading to measurable energy and cost savings.
Q
Are mullite insulation bricks resistant to chemical corrosion?
Yes. The high Al₂O₃ content and strict control of impurities such as Fe₂O₃ and K₂O give mullite insulation bricks excellent resistance to both acidic and alkaline media. They also perform stably in reducing atmospheres, making them well-suited for petrochemical and metallurgical environments where corrosive gases are present.
Q
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 substances during production or use. They comply with international environmental protection standards. Their lightweight nature (bulk density 0.5–1.35 g/cm³) also reduces structural load on furnaces, contributing to safer long-term equipment operation.
Q
Which industries are mullite insulation bricks most commonly used in?
Mullite insulation bricks are widely used across multiple industries including metallurgy (blast furnaces, sinter cooling equipment), ceramics and building materials (tunnel kilns, roller kilns, shuttle kilns), glass manufacturing (melting and annealing furnaces), and petrochemicals (gasifiers, reformers, carbon black reactors). Their versatility makes them a preferred insulation solution in virtually any high-temperature industrial application.