Alumina Bubble Brick
Application:
Commonly used as the working layer and heat insulation layer of high temperature kilns in petrochemical industry gasifiers, carbon black reactors, metallurgical induction furnaces and other industries.
Technical Data:
| Item/Grade | 85 | 90 | 99 | |
|---|---|---|---|---|
| Max Service Temperature, °C | 1680 | 1700 | 1800 | |
| Al₂O₃, % | ≥ | 85 | 90 | 99 |
| SiO₂, % | ≤ | 13 | 8 | 0.2 |
| Fe₂O₃, % | ≤ | 0.2 | 0.2 | 0.2 |
| Bulk Density, g/cm³ | 1.4 – 1.7 | 1.4 – 1.7 | 1.4 – 1.7 | |
| Cold Crushing Strength, Mpa | 12 | 10 | 9 | |
| Refractoriness Under Load(0.1MPa±0.6%), °C | ≥ | 1650 | 1700 | 1700 |
| Reheating Linear Change(1600°C×3h), % | ± | 0.3 | ±0.3 | ±0.3 |
| Thermal Expansion Coefficient (Room temp – 1300°C) | ~ | 7.8 | ~8.0 | ~8.6 |
| Thermal Conductivity Coefficient (1800°C), W/(m·K) | ≤ | 0.8 | 1.3 | 1.5 |
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