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China Magnesia-Zirconia Brick for Glass Kiln Regenerators - Durable Suppliers & Factory Quality
Custom-engineered for glass furnace regenerators, our magnesia-zirconia brick blends high-purity magnesite and zirconia via advanced sintering. It integrates magnesia's alkali resistance and zirconia's thermal stability, tailored to the harsh cyclic high-temperature, alkaline erosion environment of glass kiln regenerators, serving as a premium refractory for glass manufacturing.
Core Advantages
Superior Thermal Shock Resistance
ZrO₂-modified structure enhances resistance to rapid temperature changes, perfectly adapting to glass furnace regenerators' frequent heating-cooling cycles, effectively preventing cracking, peeling and structural damage.
Strong Alkali & Erosion Resistance
High MgO content resists alkaline glass melts, flue gas and dust erosion, while zirconia reinforces surface compactness, outperforming ordinary magnesia bricks in glass kiln harsh working conditions.
Excellent High-Temperature Stability
Withstands high temperatures, maintaining structural density, mechanical strength and dimensional stability under prolonged high-temperature operation in regenerators.
Energy-Saving & Long Lifespan
Dense texture minimizes heat loss, improves heat storage and exchange efficiency of regenerators, reduces glass furnace energy consumption, and extends lining service life to lower maintenance costs.
Product Parameters
| Item | Magnesia-Chrome Bricks | Magnesia-Zirconia Bricks | ||||
| DMC-20 | DMC-16 | DMC-12 | DMC-8 | MZr-75 | MZr-78 | |
| MgO % | 55 | 60 | 65 | 70 | 75 | 78 |
| SiO₂ % | 1.5 | 1.5 | 2.8 | 3.0 | 10.0 | 8.0 |
| CaO % | / | / | / | / | 2.0 | 1.5 |
| ZrO₂ % | / | / | / | / | 13.0 | 13.0 |
| Cr₂O₃ % | 20 | 16 | 12 | 8 | 2.0 | 3.0 |
| Bulk Density (g/cm³) | 3.15 | 3.05 | 3.02 | 2.95 | 3.10 | 3.18 |
| Apparent Porosity (%) | 16 | 16 | 18 | 18 | 15 | 14 |
| Cold Crushing Strength (MPa) | 40 | 40 | 40 | 40 | 80 | 100 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | 1700 | 1700 | 1650 | 1620 | 1600 | 1670 |
| Thermal Shock Stability (950℃ cooling, times) | 20 | 20 | 20 | 20 | 15 | 15 |
Detailed Application Scenarios
1. Application Scenarios
◎ This magnesia-zirconia brick is exclusively designed for glass furnace regenerators, widely applicable to float glass, container glass, optical glass, borosilicate glass and other specialty glass production lines. It is specifically suitable for lining key parts of glass furnace regenerators, including checkerwork (grid bricks), upper chamber linings (high-temperature zone in contact with flue gas), lower chamber linings (thermal exchange zone), flue connections (transition zone with temperature fluctuations), and regenerator throat parts (high erosion area). It perfectly adapts to the core working conditions of glass furnace regenerators, such as cyclic heating-cooling (temperature difference up to 800℃), alkaline erosion from glass melt volatiles and flue dust, and thermal shock caused by air-fuel switching, ensuring stable operation of the regenerator and improving the overall efficiency of the glass furnace.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
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Q What makes magnesia-zirconia bricks better than standard magnesia bricks for glass furnace regenerators?
Magnesia-zirconia bricks incorporate ZrO₂ into the magnesia matrix, which significantly improves thermal shock resistance and surface compactness. This makes them far more durable under the cyclic heating-cooling conditions and alkaline erosion typical of glass furnace regenerators, where standard magnesia bricks tend to crack and degrade faster.
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Q Which specific parts of a glass furnace regenerator are these bricks suitable for?
These bricks are suitable for all key zones of glass furnace regenerators, including checkerwork (grid bricks), upper chamber linings in the high-temperature flue gas contact zone, lower chamber thermal exchange linings, flue connection transition zones, and regenerator throat areas that experience high erosion.
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Q What types of glass production lines are compatible with these bricks?
These magnesia-zirconia bricks are compatible with a wide range of glass production lines, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass manufacturing processes that use regenerative furnaces.
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Q What is the ZrO₂ content in the MZr-75 and MZr-78 grades, and how does it affect performance?
Both MZr-75 and MZr-78 grades contain 13.0% ZrO₂. This zirconia content reinforces the brick's microstructure, improving resistance to thermal shock and alkaline erosion while enhancing surface density — key factors for long service life in regenerator environments.
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Q How do these bricks contribute to energy savings in glass furnace operations?
The dense texture of magnesia-zirconia bricks minimizes heat loss through the regenerator lining. This improves the overall heat storage and exchange efficiency of the regenerator, which directly reduces the energy consumption of the glass furnace and lowers operating costs over time.
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Q Can custom sizes or specifications be provided for specific furnace designs?
Yes. Our magnesia-zirconia bricks are custom-engineered to meet the specific requirements of different glass furnace designs. We can work with your technical team to provide tailored dimensions, chemical compositions, and performance specifications to match your regenerator's exact working conditions.