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65% Zircon Brick for Industrial Use - High-Quality Suppliers and Factory in China
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
Q
What is the maximum operating temperature for zircon mullite brick?
Our zircon mullite brick has a refractoriness under load of up to 1650℃ (pyrometric cone equivalent SK 31), making it suitable for sustained operation in extreme high-temperature industrial environments without deformation or structural damage.
Q
What industries are zircon bricks most commonly used in?
Zircon bricks are widely used across the glass industry (melting furnaces, furnace crowns, port arches), metallurgical industry (steel ladles, continuous casting ladles, induction furnace linings), as well as ceramic sintering kilns and high-temperature chemical processing equipment.
Q
What is the ZrO₂ content of your zircon bricks, and why does it matter?
Both our Dense Zircon Brick and standard Zircon Brick contain ≥65% ZrO₂. A higher ZrO₂ content directly contributes to superior corrosion resistance against molten glass and slag, greater thermal stability, and longer service life in demanding industrial applications.
Q
What is the difference between Dense Zircon Brick and standard Zircon Brick?
The Dense Zircon Brick offers a slightly higher bulk density (≥3.80 g/cm³ vs ≥3.75 g/cm³) and lower apparent porosity (≤17% vs ≤18%), which translates to greater resistance to penetration by molten glass or slag. Both grades share the same cold crushing strength (≥100MPa) and refractoriness under load (≥1700℃).
Q
How do zircon bricks help improve glass quality and furnace longevity?
Zircon bricks effectively reduce bubble precipitation in glass melts due to their dense, low-porosity structure. This ensures higher purity and optical quality of glass products. Additionally, their excellent thermal shock resistance and chemical inertness significantly extend furnace service life, reducing downtime and overall production costs.
Q
Can zircon bricks withstand both acid and alkali environments?
Yes. Zircon bricks exhibit excellent resistance to both acidic and alkaline corrosive media. This makes them highly suitable not only for glass and steel industries but also for chemical industry equipment that handles high-temperature corrosive substances, including acid-generating and alkali-generating processes.