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Premium 65% Zircon Brick Suppliers in China - High-Quality Refractory Bricks from Our Factory
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
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Frequently Asked Questions (FAQ)
What are the primary chemical components of zircon bricks?
Our zircon bricks contain high-purity raw materials with a ZrO₂ content of ≥65%, SiO₂ of ≤34%, and low Fe₂O₃ impurities (≤0.4% to ≤0.5%), ensuring optimal chemical stability and refractory performance.
What is the refractoriness under load for zircon refractory bricks?
Under a load of 0.2MPa (T0.6), our zircon bricks offer refractoriness under load of ≥1700℃, with refractoriness reaching up to 1650℃ in heavy industrial settings, maintaining excellent dimensional and structural stability.
Why are zircon bricks preferred in glass melting furnaces?
They feature outstanding resistance to molten glass erosion and thermal shock. They minimize bubble formation in glass melts, prolong furnace lifespan, and are extensively used in crowns, port arches, pool bottoms, and feeder bricks.
How does cold crushing strength contribute to zircon brick durability?
With a cold crushing strength of ≥100 MPa, our zircon bricks can withstand heavy mechanical impacts, high physical loads, and scouring from molten metals or batch materials without cracking or spalling.
In which metallurgical applications are zircon bricks used?
They are ideal for lining stainless steel ladles, continuous casting ladles, high-temperature induction furnaces, sprue bricks, and plug bricks due to their resistance to aggressive metal oxides and molten slag.
Can zircon bricks handle acidic and alkaline industrial environments?
Yes, their dense crystal structure provides superior resistance against both acid-alkali media and chemical corrosion, making them suitable for ceramic sintering kilns, ball mills, and chemical process equipment.