+86-15527482889
Hot Products
0102030405
China Suppliers Magnesia-Zirconia Brick for Glass Kiln Regenerators - High Thermal Shock & Alkali Resistance 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
Contact us now for a quote and experience the difference of working with the best in the business.
❓ Frequently Asked Questions
Q
What makes magnesia-zirconia bricks superior to ordinary magnesia bricks for glass furnace regenerators?
Magnesia-zirconia bricks combine the high MgO content of magnesia bricks with the added benefits of zirconia (ZrO₂), which significantly enhances thermal shock resistance, surface compactness, and structural stability. This dual-material design allows them to better withstand the frequent heating-cooling cycles, alkaline erosion, and high-temperature stresses found in glass furnace regenerators, extending service life and reducing maintenance costs compared to ordinary magnesia bricks.
Q
Which specific parts of a glass furnace regenerator are magnesia-zirconia bricks suitable for?
These bricks are suitable for lining multiple critical zones within glass furnace regenerators, including checkerwork (grid bricks), upper chamber linings in the high-temperature flue gas contact zone, lower chamber linings in the thermal exchange zone, flue connection transition zones with temperature fluctuations, and regenerator throat parts subject to high erosion. Their versatility makes them ideal across the entire regenerator structure.
Q
What types of glass production lines can benefit from magnesia-zirconia bricks?
Magnesia-zirconia bricks are widely applicable to a broad range of glass production lines, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass manufacturing facilities. Any glass furnace that operates regenerators under cyclic high-temperature and alkaline erosion conditions can benefit from these advanced refractory bricks.
Q
How do magnesia-zirconia bricks contribute to energy savings in glass furnaces?
The dense microstructure of magnesia-zirconia bricks minimizes heat loss through the regenerator lining, improving the efficiency of heat storage and exchange within the regenerator. This enhanced thermal efficiency directly reduces the overall energy consumption of the glass furnace. Additionally, their extended service life means fewer shutdowns for relining, further contributing to operational cost savings.
Q
What is the difference between MZr-75 and MZr-78 magnesia-zirconia brick grades?
The primary difference between MZr-75 and MZr-78 lies in their MgO content — 75% and 78% respectively — and their resulting physical properties. MZr-78 offers a higher bulk density (3.18 g/cm³ vs. 3.10 g/cm³), lower apparent porosity (14% vs. 15%), and significantly higher cold crushing strength (100 MPa vs. 80 MPa), making it the stronger and denser option. MZr-78 also achieves a higher refractoriness under load (1670℃ vs. 1600℃), making it more suitable for zones with more extreme thermal and mechanical demands.
Q
How should magnesia-zirconia bricks be installed and maintained in glass furnace regenerators?
Magnesia-zirconia bricks should be installed by experienced refractory professionals following the furnace manufacturer's specifications and appropriate jointing materials compatible with high MgO refractories. During operation, gradual heat-up schedules are recommended to avoid thermal shock during initial firing. Regular inspections during scheduled maintenance shutdowns should be performed to assess wear in high-erosion zones such as the regenerator throat. Prompt replacement of damaged sections can prevent cascading structural issues and extend the overall lining campaign life.