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China Suppliers Factory Magnesia-Zirconia Brick for High-Temperature Glass Kiln Regenerators - Thermal Shock Resistance
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 (FAQ)
Q
What is magnesia-zirconia brick and what makes it different from ordinary magnesia brick?
Magnesia-zirconia brick is a composite refractory produced by blending high-purity magnesite with zirconia (ZrO₂) through advanced sintering. Unlike ordinary magnesia bricks, the addition of ZrO₂ significantly enhances thermal shock resistance, surface compactness, and alkali erosion resistance, making it far more suitable for the demanding cyclic high-temperature environments found in glass furnace regenerators.
Q
Which parts of a glass furnace regenerator are magnesia-zirconia bricks most suitable for?
Magnesia-zirconia bricks are specifically designed for key regenerator components including checkerwork (grid bricks), upper chamber linings (high-temperature flue gas contact zones), lower chamber linings (thermal exchange zones), flue connections (temperature transition zones), and regenerator throat parts (high erosion areas). Their properties are tailored to withstand the unique stresses in each of these locations.
Q
What types of glass production lines can benefit from magnesia-zirconia bricks?
These bricks are widely applicable across a broad range of glass manufacturing processes, including float glass, container glass, optical glass, borosilicate glass, and other specialty glass production lines. Any process using a regenerative glass furnace that requires reliable, long-lasting refractory materials can benefit from their use.
Q
How do magnesia-zirconia bricks help reduce energy consumption in glass furnaces?
The dense microstructure of magnesia-zirconia bricks minimizes heat loss through the regenerator lining, improving the overall heat storage and exchange efficiency. This enhanced thermal performance directly reduces the energy required to maintain furnace operating temperatures, leading to measurable reductions in fuel consumption and overall glass furnace operating costs.
Q
What is the difference between the MZr-75 and MZr-78 grades of magnesia-zirconia brick?
The primary differences lie in MgO content, density, and mechanical strength. MZr-78 contains a higher MgO percentage (78% vs. 75%), has 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). MZr-78 also offers a higher refractoriness under load (1670℃ vs. 1600℃), making it better suited for the most demanding high-temperature and high-load zones in regenerators.
Q
How do I select the right magnesia-zirconia brick grade for my glass furnace regenerator?
Selecting the right grade depends on the specific zone of the regenerator, operating temperature, frequency of thermal cycling, and the type of glass being produced. For zones with extreme temperatures and heavy mechanical loads, MZr-78 is recommended due to its superior strength and density. For other zones with moderate conditions, MZr-75 may be sufficient. We recommend contacting our technical team with your furnace specifications so we can provide a tailored recommendation for optimal performance and cost efficiency.