Alumina hollow ball products are sintered at high temperature with high-purity alumina hollow ball as the main raw material. The product has the advantages of small bulk density, high compressive strength, low thermal conductivity, and high operating temperature.
It can be widely used in the lining of high-temperature kilns such as synthetic nitrogen liquefaction furnaces, ethylene gas furnaces, etc., which are resistant to erosion. Gas and slag have strong resistance, and the operating temperature is below 1800℃.
| Variety Project | Mullite combined with alumina hollow ball brick | High-purity alumina hollow ball brick | ||||
| YMQ-1.1 | YMQ-1.3 | YMQ-1.5 | YMQ-1.3 | YMQ-1.5 | YMQ-1.7 | |
| Bulk density g/cm³ | 1.1 | 1.3 | 1.5 | 1.3 | 1.5 | 1.7 |
| Compressive strength at room temperature MPa≥ | 4.0 | 5.5 | 6.5 | 5.5 | 6.5 | 7.0 |
| Rate of change of reburning line<0.5%(℃×h) | 1550×8 | 1600×8 | 1650×8 | 1700×8 | 1700×8 | 1750×8 |
| Thermal conductivity(350±25℃)w/m.k | 0.45 | 0.55 | 0.65 | 0.55 | 0.65 | 0.75 |
| Thermal shock stability 1100℃ air cooling (times) | 15 | 15 | 15 | |||
| AL₂O₃ (%)≥ | 75 | 85 | 98 | |||
| Fe₂O₃ (%)< | 0.8 | 0.6 | 0.4 | |||
