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Andalusite Brick for Industrial Furnaces - High-Quality China Suppliers and Factory Solutions
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 |
| Bulk Density (g/cm³) | ≥2.50 | ≥2.30 | ≥2.40 |
| Apparent Porosity (%) | ≤18 | ≤19 | ≤20 |
| Cold Crushing Strength (MPa) | ≥80 | ≥80 | ≥60 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | ≥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
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 operating temperature of andalusite brick?
Andalusite brick has a refractoriness under load (RUL) exceeding 1600°C (at 0.2 MPa, 0.6% deformation), making it suitable for sustained use in extreme high-temperature industrial environments such as blast furnaces, glass furnaces, and cracking furnaces.
Q
How does andalusite brick compare to ordinary refractory bricks?
Andalusite brick outperforms ordinary refractory bricks in several key areas: it offers superior thermal shock resistance due to its low thermal expansion coefficient, higher mechanical strength from its dense sintered structure, and better resistance to molten metal and slag erosion, resulting in a significantly longer service life.
Q
Is andalusite brick suitable for cyclic heating and cooling applications?
Yes. Thanks to its low thermal expansion coefficient, andalusite brick effectively resists cracking caused by rapid or repeated temperature fluctuations. This makes it an ideal choice for applications with frequent cyclic heating-cooling operations, such as regenerative heating furnaces and ceramic kilns.
Q
What industries commonly use andalusite brick?
Andalusite brick is widely used across multiple high-temperature industries, including metallurgy (blast furnace linings), ceramics and glass manufacturing (kiln walls, glass furnace regenerators), petrochemicals (cracking furnaces, catalytic reformers), cement production (rotary kiln burning zones), and waste incineration plants.
Q
Can andalusite brick help reduce overall production costs?
Absolutely. Due to its extended service life and excellent durability, andalusite brick reduces the frequency of brick replacement and maintenance shutdowns. For example, its use in Baosteel's lime rotary kiln lowered kiln shell temperature by 15–20℃, improving operational efficiency and significantly cutting long-term maintenance expenditures.
Q
What are the key technical specifications of your andalusite brick?
Our andalusite brick features an Al₂O₃ content of ≥53%, Fe₂O₃ ≤1.7%, bulk density ≥2.40 g/cm³, apparent porosity ≤20%, cold crushing strength ≥60 MPa, and a refractoriness under load of ≥1600°C. Please refer to the Product Parameters table above for a full comparison with our sillimanite brick grades.