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China Zircon Mullite Brick Suppliers - High-Performance Refractory Materials from a Leading Factory
Core Advantages
Superior High-Temperature Stability
With refractoriness under load up to 1650℃ and pyrometric cone equivalent of SK 31, our zircon mullite brick maintains structural integrity and stable performance in extreme high-temperature industrial environments, avoiding deformation or damage during long-term continuous operation. This high-temperature stability makes the zircon mullite refractory brick an ideal choice for high-heat industrial furnaces.
Strong Erosion & Slag Resistance
The unique crystal structure of our zircon mullite brick, composed of mullite and zirconium oxide particles, forms a dense protective layer. This layer resists penetration and erosion of molten glass, acidic/alkaline slags and corrosive gases, making the zircon mullite refractory brick highly durable and extending its service life in harsh industrial settings.
Low Apparent Porosity & High Bulk Density
Our zircon mullite brick bulk density ≥2.9 g/cm³. This low porosity and high density shorten bubble discharge time during furnace operation, improve production efficiency and product yield. The zircon mullite refractory brick's dense structure also enhances its overall mechanical performance.
Product Parameters
| Item | Zircon Mullite Brick | ||
| ZrO₂ % | ≥20 | ≥16 | ≥12 |
| Fe₂O₃ % | ≤0.3 | ≤0.3 | ≤0.3 |
| Bulk Density (g/cm³) | ≥3.00 | ≥2.90 | ≥2.90 |
| Apparent Porosity (%) | ≤10 | ≤11 | ≤11 |
| Cold Crushing Strength (MPa) | ≥100 | ≥100 | ≥100 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | ≥1700 | ≥1700 | ≥1650 |
Detailed Application Scenarios
1
Glass Industry
As a core refractory material for glass production lines, zircon mullite brick is widely used in key parts that are in direct contact with molten glass, such as photovoltaic ultra-white glass rolling production line lip stones, overflow port side blocks, furnace throat, and weir. Our zircon mullite brick's extremely low apparent porosity shortens bubble discharge time to less than 5 hours, reducing furnace downtime and improving glass yield. The excellent corrosion resistance and low pollution performance of this zircon mullite refractory brick ensure the purity of molten glass, avoiding defects such as bubbles and impurities in glass products. Meanwhile, its good thermal insulation performance reduces temperature loss on both sides of the overflow port, ensuring stable glass rolling molding.
2
Ceramic Industry
In ceramic firing processes, zircon mullite brick is suitable for high-temperature zones of tunnel kilns, shuttle kilns, and roller kilns, as well as kiln furniture such as shelves and posts. Our zircon mullite brick can withstand the high temperature environment above 1600℃ and frequent temperature changes during ceramic firing, and has strong resistance to erosion by ceramic glazes and fluxes. The high mechanical strength of this zircon mullite refractory brick ensures that it is not easily damaged during stacking and use, extending the service life of kiln furniture and reducing production costs for ceramic enterprises.
3
Metallurgical Industry
In metallurgical production, zircon mullite brick is used in linings of steel ladles, tundishes, and intermediate frequency furnaces, as well as high-temperature flue ducts and combustion chambers. Our zircon mullite brick can resist erosion and scouring by molten steel, slag, and high-temperature flue gas, and maintain stable structural performance under high temperature and high pressure conditions. The good thermal shock resistance of this zircon mullite refractory brick adapts to the frequent start-stop and temperature fluctuation of metallurgical furnaces, reducing the number of maintenance and ensuring continuous production of metallurgical processes.
4
Petrochemical Industry
In petrochemical equipment such as crackers, carbon black reactors, and gasifiers, zircon mullite brick is used as a lining material for high-temperature reaction zones. Our zircon mullite brick can withstand the corrosion of high-temperature hydrocarbons, acidic and alkaline media, and has excellent thermal stability and mechanical strength. This zircon mullite refractory brick effectively isolates the high-temperature reaction zone from the equipment shell, preventing equipment deformation and damage, and ensuring safe and stable operation of petrochemical production.
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 zircon mullite brick and what are its main components?
Zircon mullite brick is a high-performance refractory material composed primarily of mullite (Al₂O₃·SiO₂) and zirconium oxide (ZrO₂). The combination of these two materials gives the brick its exceptional high-temperature stability, corrosion resistance, and low apparent porosity, making it suitable for demanding industrial applications in glass, ceramic, metallurgical, and petrochemical industries.
Q
What is the maximum operating temperature of zircon mullite brick?
Our zircon mullite brick can withstand a refractoriness under load of up to 1700℃ (at 0.2 MPa, 0.6% deformation) for grades with ZrO₂ ≥20% and ≥16%, and up to 1650℃ for the grade with ZrO₂ ≥12%. The pyrometric cone equivalent reaches SK 31, ensuring reliable performance in extreme high-temperature industrial environments.
Q
What industries are zircon mullite bricks most commonly used in?
Zircon mullite bricks are widely used across multiple industries including the glass industry (lip stones, overflow port side blocks, furnace throats, and weirs), the ceramic industry (tunnel kilns, shuttle kilns, roller kilns, and kiln furniture), the metallurgical industry (steel ladles, tundishes, intermediate frequency furnaces), and the petrochemical industry (crackers, carbon black reactors, and gasifiers).
Q
How does zircon mullite brick resist chemical erosion and slag penetration?
The unique crystal microstructure of zircon mullite brick — formed by the dense interlocking of mullite crystals and zirconium oxide particles — creates a highly compact protective layer. This dense structure effectively blocks the penetration of molten glass, acidic and alkaline slags, and corrosive gases. The low apparent porosity (≤10–11%) further minimizes pathways for chemical attack, significantly extending the brick's service life in harsh environments.
Q
What are the available ZrO₂ content grades and how do they differ?
We offer zircon mullite bricks in three ZrO₂ content grades: ≥20%, ≥16%, and ≥12%. Higher ZrO₂ content generally corresponds to greater bulk density (up to ≥3.00 g/cm³), better corrosion resistance, and higher refractoriness under load (up to ≥1700℃). All grades maintain a cold crushing strength of ≥100 MPa and Fe₂O₃ content ≤0.3%, ensuring high purity and mechanical reliability.
Q
Can zircon mullite bricks be customized to specific sizes and shapes?
Yes, we offer customized zircon mullite bricks tailored to specific dimensions, shapes, and technical requirements based on your application needs. Whether you require standard brick formats or special profiles for complex furnace structures, our engineering team can work with you to develop the optimal solution. Please contact us with your project specifications to receive an accurate quote and technical consultation.