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China Zircon Mullite Brick Suppliers - High-Performance Refractory Factory for Industrial High-Temp Applications
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
What is zircon mullite brick and what are its main components?
Zircon mullite brick is a high-performance refractory material composed primarily of mullite and zirconium oxide (ZrO₂) particles. The ZrO₂ content ranges from ≥12% to ≥20% depending on the grade, while Fe₂O₃ is kept as low as ≤0.3% to ensure high purity and minimal contamination of processed materials.
What is the maximum operating temperature for zircon mullite brick?
Our zircon mullite brick offers refractoriness under load (0.2 MPa, 0.6%) of up to ≥1700℃ for premium grades, with a pyrometric cone equivalent of SK 31. This makes it suitable for the most demanding high-temperature industrial applications including glass furnaces, ceramic kilns, and metallurgical equipment.
Which industries are best suited for zircon mullite refractory brick?
Zircon mullite brick is widely used across multiple industries including the glass industry (furnace throats, overflow ports, lip stones), ceramic industry (tunnel kilns, shuttle kilns, roller kilns and kiln furniture), metallurgical industry (steel ladles, tundishes, intermediate frequency furnaces), and petrochemical industry (crackers, carbon black reactors, gasifiers).
How does the low apparent porosity of zircon mullite brick benefit glass production?
The extremely low apparent porosity (≤10–11%) of zircon mullite brick shortens bubble discharge time in glass furnaces to less than 5 hours. This significantly reduces furnace downtime, improves glass yield, and ensures the purity of molten glass — preventing defects such as bubbles and impurities in finished glass products.
What is the cold crushing strength and bulk density of zircon mullite brick?
All grades of our zircon mullite brick achieve a cold crushing strength of ≥100 MPa, demonstrating excellent mechanical durability. The bulk density ranges from ≥2.90 g/cm³ to ≥3.00 g/cm³ depending on the ZrO₂ content grade, ensuring a dense and robust structure suitable for heavy-duty industrial use.
Can zircon mullite brick withstand frequent thermal cycling and temperature fluctuations?
Yes. Zircon mullite brick exhibits excellent thermal shock resistance, making it well-suited to applications that involve frequent start-stop cycles and rapid temperature changes — such as metallurgical furnaces and ceramic kilns. This property reduces maintenance frequency, extends service life, and ensures continuous, reliable industrial production.