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Magnesia-Zirconia Bricks for Glass Kiln Regenerators - High-Quality China Suppliers & Factory Products
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
QWhat is magnesia-zirconia brick and what makes it different from ordinary magnesia brick?
Magnesia-zirconia brick is a premium refractory material produced by blending high-purity magnesite with zirconia (ZrO₂) through advanced sintering technology. Unlike ordinary magnesia bricks, it combines the alkali resistance of MgO with the enhanced thermal stability and surface compactness provided by ZrO₂, resulting in superior thermal shock resistance, higher cold crushing strength, and longer service life — especially in the harsh cyclic high-temperature environments of glass furnace regenerators.
QWhich parts of a glass furnace regenerator are magnesia-zirconia bricks most suitable for?
Magnesia-zirconia bricks are specifically designed for key structural zones of glass furnace regenerators, including checkerwork (grid bricks), upper chamber linings (high-temperature flue gas contact zones), lower chamber linings (thermal exchange zones), flue connection transition zones, and regenerator throat areas that experience high erosion. These positions benefit most from the brick's thermal shock resistance and alkali erosion resistance.
QWhat types of glass production lines are compatible with magnesia-zirconia bricks?
These bricks are widely applicable across multiple glass manufacturing sectors, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass production lines. Any glass furnace regenerator operating under cyclic heating-cooling conditions with alkaline flue gas and dust erosion can benefit from magnesia-zirconia brick linings.
QWhat is the difference between MZr-75 and MZr-78 magnesia-zirconia bricks?
The primary difference lies in MgO content and performance metrics. MZr-78 contains a higher MgO percentage (78% vs. 75%), features a higher bulk density (3.18 g/cm³ vs. 3.10 g/cm³), lower apparent porosity (14% vs. 15%), significantly higher cold crushing strength (100 MPa vs. 80 MPa), and a higher refractoriness under load (1670°C vs. 1600°C). MZr-78 is therefore more suitable for extremely demanding high-temperature and high-load applications.
QHow does the ZrO₂ content in magnesia-zirconia bricks improve thermal shock resistance?
ZrO₂ (zirconia) modifies the microstructure of the brick by introducing micro-crack toughening mechanisms and improving the matrix's ability to absorb thermal stress. When the brick undergoes rapid temperature changes — such as the frequent air-fuel switching cycles in regenerators with temperature differences up to 800°C — the ZrO₂-modified structure effectively dissipates stress, preventing macro-cracking, peeling, and structural collapse that commonly affect ordinary magnesia bricks.
QHow do magnesia-zirconia bricks contribute to energy savings in glass furnaces?
The dense, low-porosity texture of magnesia-zirconia bricks (apparent porosity as low as 14%) significantly minimizes heat loss through the regenerator lining. This improves the overall heat storage and exchange efficiency of the regenerator, allowing the glass furnace to maintain target temperatures with reduced fuel consumption. Additionally, the extended service life of the lining reduces the frequency of costly shutdowns and maintenance operations, contributing to long-term operational cost savings.