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High-Purity Corundum Brick for Industrial Furnaces - China Suppliers and Factory
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
What are the primary differences between High-Purity and Sinter Corundum Bricks?
High-Purity Corundum Bricks contain ≥99% Al₂O₃, offer higher bulk density (≥3.2 g/cm³), and have lower impurities (SiO₂ ≤0.2%). Sinter Corundum Bricks contain ≥90% Al₂O₃, with slightly higher flexibility and different bonding matrices suited for specific industrial kilns.
What is the maximum working temperature for these refractory bricks?
Our corundum bricks are designed to withstand continuous high temperatures up to 1790°C. They exhibit excellent refractoriness under load, maintaining structural integrity at temperatures exceeding 1700°C under 0.2MPa.
How do corundum bricks resist chemical corrosion in metallurgical applications?
With a Mohs hardness of ≥9 and high density, these bricks have low apparent porosity (≤18-19%). This dense structure prevents molten metals, slags, and acidic or basic chemical media from penetrating and eroding the brick lining.
Are these bricks resistant to thermal shock and sudden temperature changes?
Yes, our corundum bricks feature a very low thermal expansion coefficient and superior heat stability, which minimizes internal stress and prevents cracking or deformation during sudden temperature cycles.
How can I request a customized size or shape for my specific kiln?
You can use our inquiry form above to send us your project specifications, including custom dimensions, shapes, and application environments. Our technical team will review your requirements and provide a tailored solution and quote.