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Andalusite Brick Suppliers in China - High-Quality Factory for Industrial Furnaces and 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
What is the primary difference between Sillimanite and Andalusite bricks?
Sillimanite bricks generally contain higher Al₂O₃ content (60% to 65% or more) and offer a higher Refractoriness Under Load (RUL ≥ 1650°C), while Andalusite bricks (typically ≥ 53% Al₂O₃) provide superior thermal shock resistance and structural stability at temperatures around 1600°C.
Why do Andalusite bricks offer superior thermal shock resistance?
Andalusite bricks have a low thermal expansion coefficient. This property prevents the brick structure from cracking or spalling during rapid heating and cooling cycles, extending the service life of kiln linings.
How do Andalusite bricks resist erosion in chemical environments?
Thanks to their dense sintered structure, these bricks are highly resistant to molten metals, slags, and corrosive gases. In petrochemical applications, they demonstrate a low weight loss rate of just 0.42%/1000h at 1200℃ in reducing atmospheres.
In which industries are these refractory bricks most commonly used?
They are widely applied in metallurgy (blast furnaces), glass and ceramic manufacturing (kiln regenerators, walls, and floors), petrochemical processing (cracking furnaces), and building materials production (lime rotary kilns).
Can replacing standard refractory bricks with Andalusite bricks improve energy efficiency?
Yes. For example, using Andalusite bricks in lime rotary kilns instead of standard spinel bricks can lower the kiln shell temperature by 15-20°C, which improves thermal efficiency and operational safety.