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High-Purity Andalusite Brick for Industrial Furnaces from China Suppliers - Reliable Factory Solution for High-Temperature Applications
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
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 refractoriness under load (RUL) of andalusite brick?
Our andalusite brick achieves a refractoriness under load (RUL) of over 1600°C (at 0.2 MPa, 0.6% deformation), making it suitable for extreme high-temperature industrial environments without structural deformation.
Q
How does andalusite brick perform under rapid temperature changes?
Thanks to its low thermal expansion coefficient, andalusite brick offers superior thermal shock resistance, preventing cracking during rapid heating and cooling cycles. This significantly extends its service life in applications with frequent temperature fluctuations.
Q
What industries are andalusite bricks and sillimanite bricks suitable for?
These refractory bricks are widely applied across metallurgy (blast furnaces, regenerative heating furnaces), ceramic and glass manufacturing, petrochemical processing (cracking furnaces, catalytic reformers), cement rotary kilns, waste incineration plants, and building materials production.
Q
What is the difference between sillimanite brick and andalusite brick in terms of Al₂O₃ content?
Sillimanite bricks offer higher Al₂O₃ content — ≥65% and ≥60% for two grades respectively — while andalusite brick contains ≥53% Al₂O₃. Higher alumina content generally provides enhanced refractoriness and resistance to slag erosion.
Q
How do andalusite bricks help reduce operational costs?
The dense sintered structure and high mechanical strength of andalusite bricks result in significantly longer service life compared to ordinary refractory bricks. This reduces replacement frequency, minimizes maintenance downtime, and lowers the overall operational costs for industrial enterprises over the long term.
Q
Can andalusite bricks be used in corrosive or reducing atmosphere environments?
Yes. Andalusite bricks demonstrate excellent resistance to corrosive high-temperature gases in reducing atmospheres, with a low weight loss rate of only 0.42% per 1000 hours at 1200℃. This makes them ideal for petrochemical applications such as cracking furnaces and catalytic reformers.