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China Magnesite Chrome Brick Suppliers | High-Quality Factory Refractories for Metallurgical & Cement Kilns
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
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
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Q What is the maximum operating temperature for Magnesia-Chrome Bricks?
Magnesia-Chrome Bricks can maintain structural integrity at temperatures up to 1800°C, making them highly suitable for extreme high-heat industrial environments such as rotary kilns, steelmaking converters, and glass melting furnaces.
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Q What is the difference between Magnesia-Chrome Bricks and Magnesia-Zirconia Bricks?
Magnesia-Chrome Bricks (DMC series) feature higher Cr₂O₃ content for superior corrosion resistance against molten slag and metal liquids, while Magnesia-Zirconia Bricks (MZr series) incorporate ZrO₂ to significantly improve cold crushing strength (up to 100 MPa) and refractoriness under load, making them ideal for applications requiring enhanced mechanical performance.
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Q Which industries are these refractory bricks most commonly used in?
These bricks are widely used across multiple high-temperature industries, including cement production (rotary kiln burning zones), metallurgy (steelmaking converters, ladles, electric furnace linings), the glass industry (melting furnace regenerators), and other high-temperature equipment such as waste incinerators, chemical reactors, and thermal power plant boilers.
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Q How does thermal shock stability affect the service life of these bricks?
Thermal shock stability measures how many heating-and-cooling cycles a brick can withstand without cracking. Our Magnesia-Chrome Bricks achieve up to 20 cycles (at 950°C water cooling), which significantly reduces the risk of spalling and cracking during rapid temperature changes, thereby extending the overall service life and reducing maintenance frequency.
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Q Can these bricks be customized to specific dimensions or compositions?
Yes. We offer customized solutions tailored to your specific application requirements, including custom dimensions, shapes, and chemical compositions. Please contact our technical team with your project details, and we will provide an accurate quote and technical recommendation.
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Q How do I choose the right grade of Magnesia-Chrome Brick for my application?
The selection depends on the operating temperature, the type of corrosive media (slag, metal liquids, chemical agents), and the required mechanical strength. For example, DMC-20 with 20% Cr₂O₃ is ideal for highly corrosive environments, while DMC-8 suits moderate conditions. MZr-78 is recommended where higher cold crushing strength (100 MPa) and better refractoriness under load (1670°C) are required. Our engineers are available to assist you in selecting the optimal product.