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High-Quality Magnesia-Zirconia Brick for Glass Furnace Regenerators | China Suppliers & Factory
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
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Frequently Asked Questions
1
What is magnesia-zirconia brick and why is it used in glass furnace regenerators?
Magnesia-zirconia brick is a high-performance refractory material made by blending high-purity magnesite and zirconia (ZrO₂) through advanced sintering. It is specifically engineered for glass furnace regenerators because it combines magnesia's strong alkali resistance with zirconia's superior thermal stability, making it ideal for withstanding the cyclic high-temperature and alkaline erosion conditions inside glass kiln regenerators.
2
What are the key differences between magnesia-zirconia bricks (MZr) and magnesia-chrome bricks (DMC)?
Magnesia-zirconia bricks (MZr-75 / MZr-78) offer significantly higher cold crushing strength (80–100 MPa vs. 40 MPa), improved bulk density, and lower apparent porosity compared to magnesia-chrome bricks. MZr bricks are also chrome-free, making them a more environmentally friendly alternative while providing excellent performance in high-erosion zones of glass furnace regenerators.
3
Which specific parts of a glass furnace regenerator are magnesia-zirconia bricks suitable for?
Magnesia-zirconia bricks are suitable for multiple critical positions within glass furnace regenerators, including the checkerwork (grid bricks), upper chamber linings (high-temperature flue gas contact zone), lower chamber linings (thermal exchange zone), flue connections (temperature transition zone), and regenerator throat parts (high-erosion area). Their versatility across these positions ensures stable regenerator operation and improved overall glass furnace efficiency.
4
How does zirconia (ZrO₂) addition improve the performance of magnesia bricks?
The addition of ZrO₂ modifies the microstructure of magnesia bricks to significantly enhance thermal shock resistance, allowing the bricks to withstand rapid temperature fluctuations without cracking or spalling. Zirconia also reinforces surface compactness, reduces porosity, and improves mechanical strength, resulting in a longer service life and better performance under the demanding conditions of glass furnace regenerators.
5
What types of glass production lines can benefit from using magnesia-zirconia bricks?
Magnesia-zirconia bricks are suitable for a wide range of glass production lines, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass manufacturing. Any glass production process that utilizes regenerative furnaces with cyclic heating-cooling conditions and exposure to alkaline glass melt volatiles can benefit from the enhanced performance of these bricks.
6
How do magnesia-zirconia bricks help reduce energy consumption and maintenance costs?
The dense texture of magnesia-zirconia bricks minimizes heat loss and significantly improves the heat storage and exchange efficiency of glass furnace regenerators. This leads to reduced energy consumption for the overall glass furnace operation. Additionally, their superior thermal shock resistance, alkali resistance, and mechanical strength extend the lining service life, thereby reducing the frequency of maintenance shutdowns and associated replacement costs.