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High-Quality Magnesia-Zirconia Brick for Glass Kiln 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
Q
What makes magnesia-zirconia bricks superior to standard magnesia bricks for glass furnace regenerators?
Magnesia-zirconia bricks combine the high MgO content's strong alkali resistance with zirconia's superior thermal stability and thermal shock resistance. The ZrO₂-modified microstructure significantly reduces cracking under rapid temperature cycling, making them far more durable than standard magnesia bricks in the aggressive environment of glass furnace regenerators.
Q
Which glass production types are compatible with these magnesia-zirconia bricks?
These bricks are suitable for a wide range of glass manufacturing applications, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass production lines. They are specifically engineered for the regenerator sections of these furnaces.
Q
What are the key positions in a glass furnace regenerator where these bricks are applied?
These bricks are used in critical regenerator positions including 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).
Q
What is the maximum temperature difference these bricks can withstand during heating-cooling cycles?
Our magnesia-zirconia bricks are engineered to handle cyclic heating-cooling conditions with temperature differences of up to 800℃. The ZrO₂-enhanced structure effectively prevents cracking, peeling, and structural damage under such extreme thermal cycling conditions.
Q
How do MZr-75 and MZr-78 grades differ, and how do I choose the right one?
MZr-78 offers a higher MgO content (78% vs 75%), greater cold crushing strength (100 MPa vs 80 MPa), lower apparent porosity (14% vs 15%), and higher bulk density (3.18 vs 3.10 g/cm³), making it better suited for the most demanding high-load and high-erosion zones. MZr-75 is ideal for standard regenerator applications with excellent overall performance. Our technical team can assist you in selecting the optimal grade based on your specific furnace conditions.
Q
How do magnesia-zirconia bricks contribute to energy savings in glass furnace operations?
The dense texture of magnesia-zirconia bricks minimizes heat loss through the regenerator lining, significantly improving heat storage and exchange efficiency. This leads to a measurable reduction in overall glass furnace energy consumption. Combined with their extended service life, they lower both operational energy costs and maintenance/replacement expenses over the long term.