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Magnesium Iron Spinel Brick from China Suppliers - High-Performance Factory Solution for Cement Rotary Kilns
Core Advantages
Superior High-Temperature Performance
Withstands continuous working temperatures up to 1790°C, maintains structural integrity under extreme heat without deformation, ensuring stable operation in high-temperature industrial processes.
Excellent Corrosion & Erosion Resistance
The spinel phase (MgO·Fe₂O₃) forms a dense protective layer, effectively resisting erosion from molten slag, alkali metals and corrosive gases in kilns and furnaces.
Strong Thermal Shock Stability
Low thermal expansion coefficient and high thermal conductivity reduce damage caused by rapid temperature changes, minimizing cracking and extending service life compared to ordinary magnesia bricks.
High Density & Mechanical Strength
Sintered at high temperature with advanced technology, the brick has low porosity (≤18%) resisting mechanical impact and wear during operation.
Product Parameters
| Item | Magnesia-Al Spinel Bricks | Magnesia-Ferro-Spinel Bricks | |||
|---|---|---|---|---|---|
| MgO % | 80 | 75 | 70 | 60 | 88 |
| Fe₂O₃ % | / | / | / | / | 4-5 |
| Al₂O₃ % | 12 | 12 | 12 | 18 | / |
| SiO₂ % | 1.0 | 1.0 | 1.5 | 1.0 | 1.2 |
| Apparent Porosity % | 18 | 18 | 18 | 18 | 18 |
| Bulk Density g/cm³ | 2.95 | 2.90 | 2.90 | 2.85 | 2.95 |
| Cold Crushing Strength MPa | 40 | 40 | 40 | 40 | 40 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | 1650 | 1650 | 1650 | 1650 | 1650 |
| Thermal Shock Stability (1100℃ cooling) times | 40 | 40 | 40 | 40 | 40 |
Detailed Application Scenarios
1
Cement Industry
◎ Widely used in the burning zone, transition zone and tertiary air duct of cement rotary kilns. Resists erosion from clinker, alkali and sulfur-containing gases, improves kiln operation stability and reduces downtime for brick replacement. Suitable for new dry-process cement production lines with high production efficiency.
2
Glass Industry
◎ Applied to the regenerator checkerwork, melting pool sidewall and bottom of glass furnaces. Withstands high temperature and corrosion from molten glass, prevents glass liquid pollution, and ensures the transparency and quality of glass products. Compatible with soda-lime glass, borosilicate glass and other production processes.
3
Non-Ferrous Metal Smelting
◎ Used in the lining of blast furnaces, electric furnaces and converter for smelting copper, aluminum, zinc and other non-ferrous metals. Resists erosion from molten metal, slag and flue gas, maintains the integrity of smelting equipment, and improves smelting efficiency and product purity.
4
Other High-Temperature Industrial Furnaces
◎ Suitable for waste incineration boilers, petrochemical cracking furnaces, ceramic kilns and refractory cement kilns. Adaptable to harsh working environments with high temperature, corrosion and thermal shock, providing reliable refractory protection for various industrial production.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
Q
What is the maximum working temperature of Magnesia Spinel Bricks?
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Magnesia Spinel Bricks can withstand continuous working temperatures up to 1790°C. They maintain structural integrity under extreme heat without deformation, making them ideal for use in high-temperature industrial processes such as cement kilns, glass furnaces and metal smelting furnaces.
Q
What is the difference between Magnesia-Al Spinel Bricks and Magnesia-Ferro-Spinel Bricks?
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Magnesia-Al Spinel Bricks contain Al₂O₃ (12–18%) and higher MgO content (60–80%), offering excellent thermal shock resistance and corrosion resistance. Magnesia-Ferro-Spinel Bricks feature a higher MgO content (88%) with Fe₂O₃ (4–5%), forming a dense spinel phase (MgO·Fe₂O₃) that provides superior protection against molten slag, alkali metals and corrosive gases in kilns and furnaces.
Q
In which industries are Magnesia Spinel Bricks most commonly used?
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Magnesia Spinel Bricks are widely used across multiple industries including: the cement industry (burning zone and transition zone of rotary kilns), the glass industry (regenerator checkerwork and melting pool), non-ferrous metal smelting (blast furnaces and electric furnaces for copper, aluminum and zinc), as well as waste incineration boilers, petrochemical cracking furnaces, ceramic kilns and refractory cement kilns.
Q
What are the key physical properties of Magnesia Spinel Bricks?
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The key physical properties include: Apparent Porosity ≤18%, Bulk Density of 2.85–2.95 g/cm³, Cold Crushing Strength ≥40 MPa, Refractoriness Under Load (0.2MPa, 0.6%) at 1650°C, and Thermal Shock Stability of 40 times (1100°C water cooling). These properties ensure high durability and long service life in demanding industrial environments.
Q
How do Magnesia Spinel Bricks improve the service life of industrial kilns and furnaces?
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Magnesia Spinel Bricks extend service life through multiple mechanisms: their low thermal expansion coefficient and high thermal conductivity minimize cracking from rapid temperature changes; the dense spinel phase resists chemical erosion from molten slag and alkali; low porosity (≤18%) reduces penetration of corrosive substances; and high mechanical strength withstands physical impact during operation — all significantly reducing maintenance downtime and replacement frequency.
Q
Can Magnesia Spinel Bricks be customized for specific application requirements?
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Yes. Magnesia Spinel Bricks are available in various formulations with different MgO content (60%–88%) and spinel compositions to suit specific industrial requirements. Whether you need bricks for cement rotary kilns, glass furnace regenerators, non-ferrous metal smelting or other high-temperature applications, our technical team can recommend the most suitable product specification. Please contact us to discuss your specific requirements and receive a tailored quote.