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High-Quality 65% Zircon Brick from China Suppliers and Factory for Glass, Metallurgy, and Ceramic Industries
⭐ Core Advantages
Exceptional High-Temperature Resistance
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.
Superior Corrosion & Wear Resistance
The dense crystal structure of zircon brick effectively resists erosion from molten glass, steel slag, metal oxides and acid-alkali media. Its high hardness also reduces wear caused by material scouring during long-term use.
Stable Volume & High Mechanical Strength
With low re-fire shrinkage and cold crushing strength ≥100MPa, our zircon brick maintains stable volume at high temperatures and withstands mechanical impact, suitable for heavy-duty industrial applications.
📊 Product Parameters
| Item | Dense Zircon Brick | Zircon Brick |
| ZrO₂ % | ≥65 | ≥65 |
| SiO₂ % | ≤34 | ≤34 |
| Fe₂O₃ % | ≤0.4 | ≤0.5 |
| Bulk Density (g/cm³) | ≥3.80 | ≥3.75 |
| Apparent Porosity (%) | ≤17 | ≤18 |
| Cold Crushing Strength (MPa) | ≥100 | ≥100 |
| Refractoriness Under Load ℃ (0.2MPa, T0.6) | ≥1700 | ≥1700 |
🏭 Detailed Application Scenarios
1. Glass Industry (Core Application)
◎ As an indispensable refractory material for glass melting furnaces, zircon brick is perfectly adapted to glass production due to its outstanding resistance to glass liquid erosion and thermal shock stability. Our zircon refractory brick is widely used in key parts of various glass furnaces, including lining of alkali-free, low-alkali, sodium-calcium and borosilicate glass melting furnaces, as well as furnace crown, port arch, melting pool bottom, feeder brick and other critical components that directly contact molten glass.
It can effectively reduce bubble precipitation in glass melts, ensure the purity and quality of glass products, and extend the service life of glass furnaces, thereby reducing production downtime and costs.
2. Metallurgical Industry
◎ In metallurgical production, zircon brick is specially designed for high-temperature and corrosion-prone working environments, relying on its excellent chemical stability and refractory performance. It is mainly used in lining of stainless steel ladles and continuous casting ladles, high-temperature induction furnace lining, sprue brick, plug brick, and furnace bottom/back lining that contacts metal oxides and slags.
3. Ceramic & Other High-Temperature Industries
◎ In the ceramic industry, zircon brick is applied to lining of ceramic sintering kilns and ball mills, leveraging its high wear resistance and high-temperature stability to improve the sintering quality of ceramic products. In the chemical industry, it is used for lining equipment handling high-temperature and corrosive media due to its acid-alkali resistance. Additionally, it is suitable for other high-temperature industrial furnaces with frequent thermal shock and heavy erosion, providing reliable refractory protection.
📬 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 zircon brick?
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Zircon brick has a refractoriness under load (0.2MPa, T0.6) of ≥1700℃ and a pyrometric cone equivalent of SK 31, making it suitable for continuous operation in extreme high-temperature environments up to 1650℃ and beyond, depending on the specific grade selected.
What is the difference between Dense Zircon Brick and standard Zircon Brick?
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Dense Zircon Brick features a higher bulk density (≥3.80 g/cm³ vs ≥3.75 g/cm³) and lower apparent porosity (≤17% vs ≤18%) compared to standard Zircon Brick. This makes the dense version more suitable for applications requiring superior resistance to glass melt penetration and chemical corrosion, while both grades share the same high cold crushing strength of ≥100MPa.
In which parts of a glass melting furnace is zircon brick typically used?
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Zircon brick is widely applied in key structural components of glass melting furnaces, including the furnace crown, port arch, melting pool bottom, feeder bricks, and the lining of alkali-free, low-alkali, sodium-calcium and borosilicate glass furnaces. These are areas that come into direct contact with molten glass and require the highest level of corrosion and thermal shock resistance.
Is zircon brick suitable for use in the metallurgical industry?
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Yes. Zircon brick is well-suited for metallurgical applications due to its excellent chemical stability and resistance to metal oxides and slag erosion. It is used in stainless steel ladle linings, continuous casting ladles, high-temperature induction furnace linings, sprue bricks, plug bricks, and furnace bottom linings that are exposed to aggressive molten metal environments.
How does zircon brick help reduce production costs in industrial furnaces?
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By combining exceptional high-temperature resistance, superior corrosion resistance, and stable volume at operating temperatures, zircon brick significantly extends the service life of industrial furnace linings. This reduces the frequency of maintenance shutdowns, lowers replacement material costs, and minimizes production downtime — resulting in improved overall operational efficiency and cost savings.
Can zircon brick withstand thermal shock in high-frequency heating and cooling cycles?
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Yes. Zircon brick offers excellent thermal shock stability, making it highly suitable for industrial furnaces that experience frequent temperature fluctuations. Its dense crystal structure and low re-fire shrinkage help maintain dimensional stability under repeated heating and cooling cycles, ensuring long-term structural integrity in demanding operating conditions such as ceramic sintering kilns and chemical processing equipment.