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China Magnesia Brick Suppliers | High-Quality Heat Resistant & Corrosion-Proof Factory Products
Core Advantages
Superior Heat Resistance
With a refractoriness under load (RUL) of ≥1700℃ and low thermal conductivity, it effectively retains heat, reduces energy consumption, and maintains structural integrity even in long-term high-temperature operations.
Strong Corrosion Resistance
High magnesia content (≥92%) enables excellent resistance to alkaline slags, molten metals, and chemical reagents, minimizing wear and extending service life in aggressive industrial environments.
Exceptional Mechanical Strength
Dense structure and high compressive strength (≥25MPa) prevent cracking and spalling caused by thermal shock, ensuring stable performance during temperature fluctuations.
Eco-Friendly & Compliant
Produced with low-pollution processes, free of harmful substances, and compliant with ISO 9001 standards, meeting global environmental and quality requirements.
Customizable Specifications
We offer tailored sizes, shapes, and magnesia content to fit specific furnace designs and industrial needs, providing personalized refractory solutions.
Product Parameters
| Item | Magnesia Bricks | ||||||
| DMZ-98A | DMZ-98B | DMZ-97A | DMZ-97B | DMZ-96 | DMZ-95 | DMZ-92 | |
| MgO % | 97.5 | 97.3 | 97 | 96.5 | 96 | 95 | 92 |
| CaO% | 1.3 | 1.6 | 1.5 | 1.8 | 1.8 | 2.0 | 2.5 |
| SiO₂ % | 0.7 | 0.8 | 0.8 | 1.0 | 2.0 | 2.4 | 3.0 |
| Bulk Density (g/cm³) | 3.05 | 3.03 | 3.0 | 2.98 | 2.98 | 2.95 | 2.92 |
| Apparent Porosity (%) | 14.5 | 16 | 15 | 15.50 | 15.50 | 16 | 17 |
| Cold Crushing Strength (MPa) | 95 | 95 | 95 | 95 | 90 | 90 | 90 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | 1700 | 1700 | 1700 | 1700 | 1680 | 1620 | 1540 |
| Thermal Shock Stability (950℃ cooling) times | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Detailed Application Scenarios
1 Glass Industry
◎ Our magnesia bricks are widely applied in glass furnace regenerators and melting furnaces, with targeted performance for harsh working conditions. In regenerators, high-purity magnesia bricks (MgO ≥ 97%) are used for upper checker bricks and upper walls, while medium-grade ones (MgO 95%-96%) fit the middle and lower checker bricks (800-1000℃ area). They excel in heat storage and transfer at 1100-1300℃, boosting furnace thermal efficiency. With low apparent porosity and strong corrosion resistance, they resist alkali metal oxides, sulfides, and soot erosion, avoiding loose intercrystalline structure caused by low-melting substances. Also suitable for regenerator flues and breast walls, and melting furnace crowns/walls, adapting to float glass and bottle glass furnaces, ensuring stable glass quality and long service life.
2 Cement Industry
◎ Applied in the burning zone and transition zone of rotary kilns for cement production. Withstands high temperatures and erosion from cement clinker and alkaline dust, reducing lining replacement frequency and improving production efficiency. Ideal for large-scale cement plants pursuing continuous operation.
3 Steel Industry
◎ Widely used in the lining of steelmaking furnaces, including electric arc furnaces, basic oxygen furnaces (BOF), and ladles. It resists erosion from molten steel and alkaline slags, ensuring the furnace lining's long service life and stable steel quality. Suitable for slag lines, tapping mouths, and other key parts with high wear and corrosion.
4 Non-Ferrous Metallurgy Industry
◎ Suitable for the lining of furnaces used in copper, aluminum, and zinc smelting. Withstands erosion from molten non-ferrous metals and acidic/alkaline slags, ensuring stable smelting processes and reducing production losses. Applied in blast furnaces, reverberatory furnaces, and electrolytic cells.
5 Other High-Temperature Industries
◎ Also used in waste incinerators, petroleum coke calcination furnaces, and ceramic kilns. Its excellent heat resistance and corrosion resistance make it adaptable to various harsh high-temperature environments, providing reliable refractory protection for 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 service temperature of your magnesia bricks?
Our high-purity magnesia bricks (DMZ-98A / DMZ-98B) feature a Refractoriness Under Load (RUL) of ≥1700℃ at 0.2MPa, making them suitable for the most demanding high-temperature industrial applications including glass furnaces and steel-making furnaces.
Q What MgO content grades are available for magnesia bricks?
We offer a full range of grades from DMZ-92 (MgO ≥92%) to DMZ-98A (MgO ≥97.5%), allowing customers to select the optimal purity level based on their specific furnace conditions, operating temperature, and budget requirements.
Q Which industries are magnesia bricks most commonly used in?
Magnesia bricks are widely used across the glass industry (furnace regenerators and melting furnaces), cement industry (rotary kilns), steel industry (electric arc furnaces, BOF, ladles), non-ferrous metallurgy (copper, aluminum, zinc smelting), and other high-temperature sectors such as waste incinerators and ceramic kilns.
Q Can you manufacture magnesia bricks in custom sizes and shapes?
Yes. We provide fully customizable solutions including tailored sizes, shapes, and magnesia content ratios to match specific furnace designs and industrial requirements. Please contact our team with your technical drawings or specifications for a precise quotation.
Q Are your magnesia bricks compliant with international quality standards?
Yes. Our magnesia bricks are produced using low-pollution manufacturing processes and are free of harmful substances. They are compliant with ISO 9001 quality management standards, meeting global environmental and quality requirements for industrial refractory products.
Q How do magnesia bricks resist corrosion from slags and molten metals?
The high MgO content (up to ≥97.5%) gives magnesia bricks outstanding alkaline resistance. Their dense microstructure with low apparent porosity (as low as 14.5%) prevents penetration by molten metals, alkaline slags, and chemical reagents, significantly extending service life in aggressive industrial environments.