+86-15527482889
Hot Products
0102030405
High-Purity Andalusite Brick from China Suppliers | Durable Refractory Solutions for Industrial Furnaces & Kilns
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 service 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 and glass furnaces.
Q
How does andalusite brick compare to sillimanite brick in terms of Al₂O₃ content?
Sillimanite bricks typically contain ≥60–65% Al₂O₃, while andalusite brick contains ≥53% Al₂O₃. Despite the slightly lower alumina content, andalusite brick offers outstanding thermal shock resistance and cost-effectiveness for a wide range of applications.
Q
Why is andalusite brick preferred for cyclic heating-cooling applications?
Andalusite brick features a low thermal expansion coefficient, which minimizes internal stresses during rapid temperature fluctuations. This superior thermal shock resistance prevents cracking and significantly extends service life in environments with frequent temperature cycling.
Q
In which industries is andalusite brick most commonly used?
Andalusite brick is widely applied across metallurgy (blast furnaces, heating furnaces), ceramics and glass manufacturing (kiln walls, regenerators), petrochemical processing (cracking furnaces, catalytic reformers), cement rotary kilns, waste incineration plants, and lime rotary kilns in building material production.
Q
What is the cold crushing strength of andalusite brick?
The cold crushing strength of andalusite brick is ≥60 MPa. Its dense sintered microstructure provides excellent mechanical strength and wear resistance, effectively withstanding erosion from molten metals, slags, and corrosive industrial gases.
Q
How does andalusite brick help reduce operational costs?
Due to its extended service life, andalusite brick reduces the frequency of lining replacements and minimizes unplanned maintenance downtime. In documented applications such as Baosteel's lime rotary kiln, it also lowers kiln shell temperatures by 15–20℃, contributing to energy savings and improved operational efficiency.