Introduction
Sillimanite bricks are manufactured by adding a specific proportion of sillimanite and other trace elements to high-alumina formulations. During high-temperature service, sillimanite converts to mullite, creating a microstructure that delivers excellent thermal shock resistance and significantly improved creep performance. These properties make sillimanite bricks particularly effective in blast furnace stacks, hot blast stoves and torpedo car critical zones. Available in JH-GXS-60 and JH-GXS-65 grades. The products are widely recognized as a superior alternative to conventional high-alumina bricks in demanding high-temperature applications.
Key Advantages
01
Excellent Thermal Shock Resistance
Withstands 20 to 25 cycles of 1100℃ water-cooling tests, preventing cracking and spalling under rapid temperature fluctuations.
02
Low High-Temperature Creep
Creep rate ≤0.2% at 1400–1450℃ under sustained load, ensuring dimensional stability and structural integrity in long-term service.
03
High Load Softening Temperature
Achieves refractoriness under load of 1600–1650℃, delivering reliable performance in the most demanding high-temperature zones.
Specification
| Item | Sillimanite Brick | JH-GXS-60 | JH-GXS-65 | Test Condition |
| Al₂O₃(%)；≥ | 60 | 65 | ||
| Bulk Density (g/cm³) | 2.45~2.65 | 2.55~2.70 | ||
| Permanent Linear Change 3h (%) | 1450℃ | 1450℃ | 0~0.1 | 0~0.1 |
| Apparent Porosity (%): ≤ | 19 | 20 | ||
| Cold Crushing Strength (MPa): ≥ | 50 | 60 | ||
| Load Softening Temperature (°C): ≥ | 1600 | 1650 | ||
| Creep Rate 20~50h (%): ≤ | 1400℃ | 1450℃ | 0.2 | 0.2 |
| Thermal Shock Resistance | 1100°C Water Cooling (cycles): ≥ | 20 | 25 |
Packaging: Wooden pallet
Precautions: Waterproof and shockproof
