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China Suppliers Factory: Mullite Insulation Brick for Energy-Saving Refractory Solutions in Metallurgy and Ceramics
Core Advantages
Outstanding Energy Conservation & Insulation
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 performance is particularly prominent in intermittent operation kilns, enhancing production efficiency.
Exceptional High-Temperature & Corrosion Resistance
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, ideal for various harsh high-temperature industrial environments.
Green & Eco-Friendly Performance
Produced from natural mineral raw materials, our mullite insulation brick emits no harmful components and complies with global environmental standards. Its lightweight design (bulk density 0.5-1.35 g/cm³) reduces furnace load and ensures safe equipment operation.
Product Parameters
| Mullite Insulation Brick Specifications | ||||||||
|---|---|---|---|---|---|---|---|---|
| JM23 | JM26 | JM28 | ||||||
| Al₂O₃ (%) | 42 | 42 | 45 | 45 | 55 | 55 | 60 | 60 |
| Fe₂O₃ (%) | 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 |
| Crushing Strength (MPa) | 1.0 | 1.5 | 1.8 | 2.5 | 2.0 | 2.5 | 2.5 | 3.0 |
| Service Temperature (℃) | 1260 | 1260 | 1300 | 1300 | 1400 | 1400 | 1450 | 1450 |
| Reheat Change (%) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Thermal Cond. (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
Suited for blast furnace hot blast stoves and sinter cooling equipment. Endures 800-1200℃ shocks with wear resistance 1.5 times that of ordinary castables. Improves cooling efficiency by 5%-8%.
◎ 2. Ceramics & Building Materials
Ideal for ceramic tunnel kilns and roller kilns. Precisely controls temperature uniformity, minimizes heat loss, and facilitates uniform sintering while extending kiln service life.
◎ 3. Glass Industry
Used in glass melting furnaces and annealing furnaces. Withstands temperatures above 1500℃ and exhibits strong chemical stability against glass slag erosion.
◎ 4. Petrochemical Industry
Applicable to gasifiers and reactors. Endures high temperatures, pressures, and corrosive gases, ensuring continuous and safe equipment operation.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
Q1: What is the maximum service temperature of your Mullite Insulation Bricks?
Our mullite insulation bricks are available in various grades, with the JM28 series capable of withstanding stable service temperatures up to 1450-1500℃, depending on the specific working environment.
Q2: How do these bricks contribute to energy savings?
With a thermal conductivity as low as 0.15 W/(m·k), they act as a highly efficient thermal barrier, significantly reducing heat loss through furnace walls and lowering overall energy consumption.
Q3: Are these bricks suitable for use in reducing atmospheres?
Yes. Due to the high purity of raw materials and low iron content (Fe₂O₃ ≤ 1.0%), our mullite bricks maintain excellent structural and chemical stability even in reducing atmospheres.
Q4: What are the main differences between JM23, JM26, and JM28?
The primary differences lie in their Al₂O₃ content and temperature resistance. JM23 is suitable for up to 1260℃, JM26 for 1400℃, and JM28 for 1450℃, with densities and strengths increasing accordingly.
Q5: Can these bricks be used in direct contact with flames?
While they are primarily used as insulation layers, high-grade mullite bricks like JM26 and JM28 can be used as hot-face linings in kilns where there is no heavy mechanical wear or intense slag erosion.
Q6: Are your products environmentally certified?
Yes, our bricks are produced using natural minerals and contain no harmful fibers or organic binders, complying with global environmental protection and safety standards.