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High-Purity Andalusite Brick from China Suppliers - Durable Refractory Solutions for Furnaces and Kilns Factory
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
What is the maximum service temperature of andalusite brick?
Andalusite brick has a refractoriness under load (RUL) exceeding 1600°C at 0.2 MPa with 0.6% deformation, making it suitable for a wide range of extreme high-temperature industrial applications including blast furnaces and cracking furnaces.
How does andalusite brick compare to ordinary refractory bricks?
Andalusite brick outperforms ordinary refractory bricks in thermal shock resistance, mechanical strength, and chemical corrosion resistance. Its dense sintered structure significantly reduces wear from molten metals, slags, and industrial gases, resulting in a longer service life and lower total cost of ownership.
Is andalusite brick suitable for environments with rapid temperature fluctuations?
Yes. The low thermal expansion coefficient of andalusite brick minimizes the risk of cracking under rapid temperature cycling. This makes it an ideal choice for applications such as regenerative heating furnaces, glass furnace regenerators, and ceramic kilns that experience frequent heating and cooling cycles.
What industries commonly use andalusite brick?
Andalusite brick is widely applied across metallurgy (blast furnaces, heating furnaces), ceramics and glass manufacturing, petrochemical processing (cracking furnaces, catalytic reformers), building materials (rotary kilns), and waste incineration plants — anywhere high-temperature stability and chemical resistance are critical.
What are the key chemical composition specifications of your andalusite brick?
Our andalusite brick contains a minimum of 53% Al₂O₃ and no more than 1.7% Fe₂O₃, with a bulk density of ≥2.40 g/cm³, apparent porosity of ≤20%, cold crushing strength of ≥60 MPa, and a refractoriness under load of ≥1600°C. Sillimanite brick grades with higher Al₂O₃ content (≥60% and ≥65%) are also available.
How can andalusite brick help reduce operational costs?
The extended service life of andalusite brick directly reduces the frequency of brick replacement and associated maintenance downtime. For example, its application in Baosteel's lime rotary kiln lowered kiln shell temperature by 15–20℃, improved kiln skin adhesion, and enhanced overall production efficiency — delivering measurable long-term cost savings.