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Alumina bubble brick
Numbering
Affiliate classification Alumina bubble brick
Weight 0
Product Description
Product Overview:
Alumina bubble brick is made of alumina hollow spheres and alumina powder as the main raw materials, combined with other binders, and fired at 1750 ℃. It belongs to a kind of energy-saving and heat-preservation material of ultra-high temperature material. Mainly used in petrochemical industry gasification furnace, carbon black industrial reactor, metallurgical industry induction electric furnace and other high-temperature, ultra-high-temperature furnaces are widely used.
Physical and chemical indicators：
| Item | Indicator | ||
| 85 | 90 | 99 | |
| Maximum use temperature ℃ | 1680 | 1700 | 1800 |
| Al2O3 % ≥ | 85 | 90 | 99 |
| SiO2 % ≤ | 13 | 8 | 0.3 |
| Fe2O3 % ≤ | 0.2 | 0.2 | 0.2 |
| Bulk Density g/cm³ | 1.4～1.7 | 1.4～1.7 | 1.4～1.7 |
| Compressive strength at room temperature Mpa ≥ | 12 | 10 | 9 |
| 0.1MPaLoad softening start temperature ℃ ≥ | 1650 | 1700 | 1700 |
| Reburning line change % ≤ |
1600℃×3h ±0.3 |
1600℃×3h ±0.3 |
1600℃×3h ±0.3 |
| Thermal Conductivity【W/(m·K)】average temperature（350±10）℃ ≤ | 0.8 | 1.3 | 1.5 |