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China Suppliers Factory Magnesite Chrome Brick for Metallurgical and Cement Kiln High-Temperature Refractory Solutions
Core Advantages
Superior Heat Resistance
Maintains structural integrity at temperatures up to 1800°C, resisting thermal shock and deformation even under rapid temperature fluctuations, suitable for high-heat industrial processes.
Strong Corrosion Resistance
Effectively resists erosion from molten slag, metal liquid, and chemical media in metallurgical and cement production, reducing material wear and extending service cycle.
High Mechanical Strength
Dense structure ensures excellent compression and impact resistance, preventing cracking and peeling during long-term operation, lowering replacement frequency.
Cost-Effective Performance
Balances high durability and reasonable cost, reducing overall production costs by minimizing downtime for maintenance and replacement.
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
Cement Industry
◎ Widely used in the burning zone, transition zone, and tertiary air duct of rotary cement kilns. Resists erosion from alkali metals and clinker, ensuring stable kiln operation and improving cement production efficiency.
2
Metallurgical Industry
◎ Applied in steelmaking converters, electric furnace linings, ladles, and tundishes. Withstands molten steel and slag erosion, suitable for primary and secondary steelmaking processes. Also used in non-ferrous metallurgy (copper, aluminum smelting) for furnace linings.
3
Glass Industry
◎ Used in glass melting furnace regenerators and throat parts. Resists high temperature and corrosion from glass liquid, maintaining furnace tightness and extending furnace service life.
4
Other High-Temperature Equipment
◎ Suitable for waste incinerators, chemical reactors, and thermal power plant boilers that operate under extreme heat and corrosive conditions, providing reliable refractory protection.
Conclusion
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Frequently Asked Questions
Magnesia-Chrome Bricks can maintain structural integrity at temperatures up to 1800°C. They are specifically engineered to resist thermal shock and deformation even under rapid temperature fluctuations, making them ideal for the most demanding high-heat industrial environments.
Magnesia-Chrome Bricks (DMC series) contain Cr₂O₃ ranging from 8% to 20% and are primarily used in cement kilns and metallurgical furnaces for their superior corrosion resistance. Magnesia-Zirconia Bricks (MZr series) incorporate ZrO₂ (13%) which delivers higher cold crushing strength (up to 100 MPa) and better thermal shock stability, making them suitable for glass furnace regenerators and applications requiring extreme mechanical durability.
These bricks are widely applied across multiple high-temperature industries including: the cement industry (burning zone and transition zone of rotary kilns), the metallurgical industry (steelmaking converters, electric furnace linings, ladles, tundishes, and non-ferrous smelting), the glass industry (melting furnace regenerators and throat parts), as well as waste incinerators, chemical reactors, and thermal power plant boilers.
These bricks are engineered to balance high durability with a reasonable cost structure. Their dense microstructure prevents cracking and peeling during long-term operation, which significantly lowers the frequency of replacements. Combined with their strong resistance to corrosion and thermal shock, they minimize unplanned downtime for maintenance, ultimately reducing total production and operational costs.
Refractoriness Under Load (RUL) is the temperature at which a refractory brick begins to deform under a specified compressive load (0.2 MPa) by a defined amount (0.6%). It is a critical parameter because it indicates how well the brick can maintain its shape and structural support under real furnace operating conditions. Our Magnesia-Chrome Bricks achieve RUL values of up to 1700°C, ensuring reliable performance in the most demanding thermal environments.
Yes. We welcome inquiries for custom specifications tailored to your specific application requirements. Please use the contact form above to describe your project details including operating temperature, chemical environment, and desired dimensions. Our technical team will review your requirements and can arrange product samples prior to bulk order placement to ensure the product meets your exact standards.