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Iron and Steel Metallurgy
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Andalusite Brick for Industrial Furnaces, Kilns & Metallurgical
Core Advantages
Strong Heat Resistance
High-purity endows this andalusite brick with a refractoriness under load (RUL) over 1600°C, enabling it to maintain structural stability in extreme high-temperature environments without deformation or performance degradation.
Superior Thermal Shock Resistance
Its low thermal expansion coefficient prevents the andalusite brick from cracking due to rapid temperature changes, greatly prolonging its service life in frequent cyclic heating-cooling scenarios.
High Mechanical Strength
The dense sintered structure enhances wear resistance, effectively resisting erosion from molten metals, slags, and corrosive industrial gases, outperforming ordinary refractory bricks in harsh working conditions.
Cost-Effective Performance
The longer service life of our andalusite brick significantly reduces replacement frequency and maintenance downtime, cutting overall operational costs for industrial enterprises in the long run.
Product Parameters
| Item | Sillimanite Brick | Sillimanite Brick | Andalusite Brick |
| Al₂O₃ % | ≥65 | ≥60 | ≥53 |
| SiO₂ % | ≤32 | ≤37 | - |
| Fe₂O₃ % | ≤0.6 | ≤1.0 | ≤1.7 |
| g/cm³ Bulk Density |
≥2.50 | ≥2.30 | ≥2.40 |
| % Apparent Porosity |
≤18 | ≤19 | ≤20 |
| MPa Cold Crushing Strength |
≥80 | ≥80 | ≥60 |
| ℃（0.2MPa,0.6%） Refractoriness Under Load |
≥1650 | ≥1650 | ≥1600 |
Detailed Application Scenarios
1. Metallurgy
◎ Widely used in blast furnace linings (e.g., Baoshan Iron & Steel’s 5500m³ blast furnace) and regenerative heating furnaces. efficiently resisting molten slag erosion and reducing production interruptions.
2. Ceramic/Glass
◎ Applied to glass furnace regenerators and ceramic kiln walls/floors. It meets Class I alkali vapor resistance standards, avoiding product contamination in high-temperature cyclic operations and ensuring stable product quality.
3. Petrochemical
◎ Ideal for lining cracking furnaces and catalytic reformers. With a low weight loss rate (0.42%/1000h at 1200℃), it withstands corrosive high-temperature gases in reducing atmospheres, guaranteeing equipment safety and longevity.
4. Other High-Temperature Fields
◎ Also used in ceramic kilns, cement rotary kiln burning zones, and waste incineration plants. Its excellent thermal stability and wear resistance adapt to different high-temperature working conditions, reducing maintenance frequency and production downtime.
5. Building Materials
◎ Adopted in Baosteel’s No.2 lime rotary kiln, replacing spinel bricks to lower kiln shell temperature by 15-20℃, improve kiln skin adhesion, and enhance operational safety and production efficiency.
Conclusion
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