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High-Purity Corundum Brick for Industrial Furnaces | China Suppliers & Factory Products
Core Advantages
Superior Heat Stability
Withstands continuous high temperatures up to 1790°C and sudden temperature changes, avoiding cracking or deformation. Its low thermal expansion coefficient ensures long-term structural integrity in extreme heat environments.
High Purity & Hardness
Alumina (Al₂O₃) content ≥90%, featuring high density (≥3.2g/cm³) and Mohs hardness ≥9. Resists wear, scouring, and erosion from molten metals, slags, and chemical media.
Long Service Life
Advanced sintering technology improves compactness and reduces porosity, minimizing oxidation and corrosion. Extends equipment lining lifespan compared to ordinary refractory bricks, lowering replacement frequency.
Product Parameters
| Item | High Quality and High Purity Corundum Brick | Sinter Corundum Brick |
| Al₂O₃ % | ≥99 | ≥90 |
| SiO₂ % | ≤0.2 | ≤8 |
| Fe₂O₃ % | ≤0.2 | ≤0.2 |
| Bulk Density (g/cm³) | ≥3.2 | ≥3 |
| Apparent Porosity (%) | ≤19 | ≤18 |
| Cold Crushing Strength (MPa) | ≥100 | ≥100 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | ≥1700 | ≥1700 |
Detailed Application Scenarios
1
Metallurgy Industry
Widely used in lining of electric arc furnaces, ladles, tundishes, and blast furnace hot blast stoves. Resists erosion from molten steel, iron, and metallurgical slags, ensuring stable operation of smelting equipment and improving metal product quality.
2
Ceramics & Glass Industry
Suitable for kiln linings, sintering zones, and soaking zones of ceramic tile kilns, glass melting furnaces, and quartz crucible sintering furnaces. Withstands high-temperature sintering and chemical corrosion from glass melts, maintaining kiln tightness.
3
Chemical Industry
Applied in lining of chemical reactors, incinerators, and acid-base resistant equipment. Resists corrosion from strong acids, alkalis, and organic media, ensuring safe and continuous operation of chemical production processes.
4
Other High-Temperature Fields
Ideal for waste incineration plants, thermal power plant boilers, and aerospace component heat treatment furnaces. Adapts to complex high-temperature, high-corrosion environments, reducing equipment maintenance costs and downtime.
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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What is the maximum operating temperature of corundum bricks?
Corundum bricks can withstand continuous high temperatures up to 1790°C, with a refractoriness under load (0.2MPa, 0.6%) of ≥1700°C, making them suitable for the most demanding high-temperature industrial applications.
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What is the difference between High Purity Corundum Brick and Sinter Corundum Brick?
High Purity Corundum Brick contains Al₂O₃ ≥99% with a bulk density ≥3.2 g/cm³, offering superior purity and density. Sinter Corundum Brick contains Al₂O₃ ≥90% and is optimized through advanced sintering for excellent long-term durability and cost efficiency.
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Which industries are corundum bricks most commonly used in?
Corundum bricks are widely used in metallurgy (electric arc furnaces, ladles, blast furnaces), ceramics and glass manufacturing (kiln linings, melting furnaces), chemical processing (reactors, incinerators), and other high-temperature fields such as power plants and aerospace heat treatment furnaces.
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How do corundum bricks resist chemical corrosion?
With Al₂O₃ content ≥90% and Fe₂O₃ ≤0.2%, corundum bricks exhibit excellent resistance to erosion from molten metals, metallurgical slags, glass melts, and strong acids and alkalis, ensuring long-term protection of equipment linings in chemically aggressive environments.
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How does advanced sintering technology extend the service life of corundum bricks?
Advanced sintering technology increases the compactness of the brick structure and reduces apparent porosity to ≤18–19%, which minimizes oxidation, corrosion, and infiltration by aggressive media. This significantly extends the lifespan of equipment linings and reduces maintenance downtime compared to ordinary refractory bricks.
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Can corundum bricks handle sudden temperature changes without cracking?
Yes. Corundum bricks feature a low thermal expansion coefficient and superior thermal shock resistance, allowing them to withstand rapid and extreme temperature fluctuations without cracking or deforming, which is critical for applications such as blast furnace hot blast stoves and waste incineration plants.