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Magnesia-Zirconia Brick for Glass Kiln Regenerators - High-Quality Suppliers & Factory in China
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.
Frequently Asked Questions
What makes magnesia-zirconia bricks superior to traditional magnesia-chrome bricks?
Magnesia-zirconia bricks offer higher cold crushing strength (up to 100 MPa), superior resistance to alkali vapor attack, and eliminate environmental concerns associated with hexavalent chromium formation present in magnesia-chrome bricks.
Which areas of the glass furnace regenerator benefit most from magnesia-zirconia bricks?
They are ideal for checkerwork grid systems, upper and lower chamber linings, flue connections, and regenerator throats where intense thermal cycling and corrosive alkali batch dust are concentrated.
How does the addition of ZrO₂ improve refractory performance?
Zirconia (ZrO₂) creates micro-crack toughening within the periclase matrix, significantly mitigating spalling during rapid heating-cooling cycles and preventing structural degradation under 800℃ cyclic temperature swings.
Can these bricks be used in specialty glass furnaces?
Yes, they are engineered for a broad range of glass melting operations, including float glass, container glass, borosilicate glass, and optical glass melting furnaces.
How do these bricks contribute to energy conservation?
With lower apparent porosity (14-15%) and enhanced bulk density, they maximize thermal heat storage and heat exchange efficiency in checkerwork, directly lowering fuel consumption per ton of molten glass.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.