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High-Quality Magnesite Chrome Brick from China Suppliers & Factory for Metallurgical and Cement Kiln Applications
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 (FAQ)
Q
What is the maximum operating temperature of Magnesia-Chrome Bricks?
Magnesia-Chrome Bricks can maintain structural integrity at temperatures up to 1800°C. Their refractoriness under load (0.2MPa) ranges from 1620°C to 1700°C depending on the grade (DMC-8 to DMC-20), making them suitable for the most demanding high-temperature industrial environments.
Q
What is the difference between Magnesia-Chrome Bricks and Magnesia-Zirconia Bricks?
Magnesia-Chrome Bricks (DMC series) contain Cr₂O₃ ranging from 8% to 20% and are primarily designed for corrosion resistance against molten slag and metal liquids in metallurgical and cement industries. Magnesia-Zirconia Bricks (MZr series) incorporate ZrO₂ (13%) which enhances cold crushing strength (up to 100 MPa) and provides superior thermal shock resistance, making them ideal for glass furnace applications.
Q
Which industries are Magnesia-Chrome and Magnesia-Zirconia Bricks most commonly used in?
These refractory bricks are widely used across multiple high-temperature industries including: the cement industry (rotary kiln burning zones and transition zones), metallurgical industry (steelmaking converters, electric furnace linings, ladles, and non-ferrous smelting furnaces), glass industry (melting furnace regenerators and throat parts), as well as waste incinerators, chemical reactors, and thermal power plant boilers.
Q
How does thermal shock stability affect the performance of these refractory bricks?
Thermal shock stability measures how many heating and rapid cooling cycles (at 950°C water cooling) a brick can withstand before cracking. Magnesia-Chrome Bricks achieve up to 20 cycles, while Magnesia-Zirconia Bricks achieve 15 cycles. Higher thermal shock stability means the bricks resist cracking during rapid temperature changes common in industrial furnace operations, significantly extending service life and reducing maintenance costs.
Q
How do I choose the right grade of Magnesia-Chrome Brick for my application?
Grade selection depends on the specific operating conditions of your application. Higher Cr₂O₃ content grades (DMC-20, DMC-16) offer stronger corrosion resistance and are recommended for environments with intense slag and chemical erosion. Lower Cr₂O₃ content grades (DMC-8, DMC-12) provide a cost-effective option for less severe conditions. For applications requiring very high mechanical strength, MZr-78 Magnesia-Zirconia Bricks with 100 MPa cold crushing strength are recommended. Please contact us with your specific requirements for a tailored recommendation.
Q
What makes these refractory bricks cost-effective compared to alternatives?
These bricks deliver long-term cost savings through their high durability and low maintenance requirements. Their dense structure prevents cracking and peeling during extended operation, reducing replacement frequency. The superior resistance to thermal shock, corrosion, and mechanical stress minimizes unplanned downtime and maintenance interventions, ultimately lowering total production costs over the lifespan of your industrial equipment.