Product Introduction
Alumina bubble brick is an ultra-high temperature energy-saving and heat-insulating material made of alumina hollow balls and alumina powder as the main raw materials, fired at 1750 degrees.
Technical Data Of Rongsheng Alumina Bubble Brick
| Item | Alumina Bubble Brick | ||
| Grade | AKZ-85 | AKZ-90 | AKZ-99 |
| Al2O3 | ≥85 | ≥90 | ≥99 |
| SiO2 | ≤13 | ≤8 | ≤0.2 |
| Fe2o3 | ≤0.5 | ≤0.5 | ≤0.5 |
| Refractoriness℃ | 1750 | 1770 | 1790 |
| Apparent Porosity ％ | 58-62 | 58-62 | 58-62 |
| Bulk Density g/cm3 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 |
| Cold Crushing Strength Mpa | ≥12 | ≥10 | ≥9 |
| 0.2Mpa RefractorinessUnder Load T0.6℃ | ≥1650 | ≥1700 | ≥1700 |
| Permanent Linear Change On Reheating % 1500℃X2h | ±0.3 | ±0.3 | ±0.3 |
| 20-1300℃ Thermal Expansion % x 10-6 | 0-7.8 | 0-8.0 | 0-8.6 |
| Thermal Conductivity Average 800℃ W/m.k | ≤0.8 | ≤1.3 | ≤1.5 |
| Max Service Temperature ℃ | 1680 | 1700 | 1800 |
Application
Widely used in high temperature and ultra-high temperature kilns such as petrochemical industry gasification furnaces, carbon black industrial reactors, and metallurgical industry induction furnaces.