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China Mullite Brick Suppliers - High-Quality Thermal Shock Resistant Refractory Materials from Reliable Factory
Core Advantages
Exceptional High-Temperature Stability
With refractoriness up to 1790℃ and load softening temperature 1600–1700℃, they maintain structural integrity under extreme heat, ensuring long service life.
Superior Thermal Shock Resistance
Resisting cracking from rapid temperature changes, suitable for intermittent operation furnaces.
Strong Corrosion & Wear Resistance
Resists most acid slags, chemical attack, and oxidation, with high cold crushing strength (70–260 MPa) for erosion-prone environments.
Low Thermal Conductivity
Reduces heat loss, improving energy efficiency of industrial kilns while ensuring stable temperature distribution.
Customizable Specifications
Available in sintered/fused cast types and various sizes, tailored to specific furnace structures and working conditions.
Product Parameters
| Item | Sintered Mullite Brick | ||
| Al₂O₃ % | ≥75–80 | ≥72–75 | ≥70 |
| Fe₂O₃ % | ≤1.2 | ≤1.2 | ≤2.0 |
| Bulk Density (g/cm³) | ≥2.70 | ≥2.65 | ≥2.65 |
| Apparent Porosity (%) | ≤18 | ≤19 | ≤20 |
| Cold Crushing Strength (MPa) | ≥90 | ≥90 | ≥70 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | ≥1650 | ≥1650 | ≥1530 |
| Creep Rate 0.2MPa (1400℃×50h) % | ≤0.8 | ≤0.8 | ≤0.8 |
Detailed Application Scenarios
1
Metallurgy Industry
◎ Applied in hot blast furnace roofs, blast furnace stacks and bottoms, torpedo tanker slag line areas, and hot air channel hanging parts. Resists iron liquid scouring and high-temperature furnace atmospheres, ensuring stable operation of metallurgical equipment.
2
Petrochemical Industry
◎ Suitable for slag gasification furnaces, synthetic ammonia conversion furnaces, carbon black reactors, and cracking furnace linings. Withstands chemical corrosion from reaction media and high-temperature creep, extending furnace service life.
3
Glass & Ceramic Industry
◎ Used in glass melting furnace regenerative chambers, clarification tank walls, ceramic tunnel kilns, roller kilns, and kiln furniture. Features low thermal conductivity and excellent thermal stability, adapting to continuous high-temperature working conditions.
4
Building Materials & Other Industries
◎ Ideal for rotary cement kilns, lime kiln inner linings, heat treatment furnaces, and resistance furnaces. Available as lightweight insulation bricks for backing linings and standard bricks for fire-facing surfaces, meeting diverse insulation and load-bearing needs.
5
Product Type
◎ Sintered Mullite Bricks: Cost-effective with balanced performance, suitable for general high-temperature kiln linings like ceramic kilns and hot blast stoves.
◎ Fused Cast Mullite Bricks: Higher purity and density, superior erosion resistance, ideal for harsh environments like glass kiln key parts and acid slag contact areas.
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 bricks?
Mullite bricks have a refractoriness of up to 1790℃ and a load softening temperature between 1600–1700℃, making them suitable for a wide range of extreme high-temperature industrial applications including metallurgy, glass, and ceramics.
What is the difference between sintered and fused cast mullite bricks?
Sintered mullite bricks are cost-effective with balanced performance, ideal for general high-temperature kiln linings such as ceramic kilns and hot blast stoves. Fused cast mullite bricks offer higher purity, greater density, and superior erosion resistance, making them the preferred choice for harsh environments like glass kiln key components and acid slag contact areas.
What is the Al₂O₃ content range in your mullite bricks?
Our sintered mullite bricks are available with Al₂O₃ content ranging from ≥70% up to ≥75–80%, depending on the grade selected. Higher alumina content corresponds to improved refractoriness and chemical stability.
Are mullite bricks suitable for intermittent or continuous furnace operations?
Yes. Mullite bricks feature superior thermal shock resistance, allowing them to withstand rapid temperature changes without cracking. This makes them equally suitable for both intermittent operation furnaces (subject to frequent thermal cycling) and continuous high-temperature processes.
Can mullite bricks be customized for specific furnace dimensions or conditions?
Absolutely. We offer mullite bricks in a variety of sizes and specifications, including both sintered and fused cast types. Products can be tailored to your specific furnace structure, working conditions, and load-bearing or insulation requirements.
Which industries commonly use mullite bricks?
Mullite bricks are widely used across multiple industries including metallurgy (blast furnaces, hot blast stoves), petrochemicals (gasification furnaces, cracking furnaces), glass and ceramics (melting furnaces, tunnel kilns), and building materials (rotary cement kilns, lime kilns, heat treatment furnaces).