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Product introduction of refractory high alumina balls
Refractory high alumina balls are made of industrial alumina and refractory kaolin as the main raw materials, which are scientifically formulated, shaped and calcined at high temperature.
Refractory alumina balls are divided into ordinary refractory balls and high alumina resistance balls. The refractory porcelain balls are resistant to high temperature up to 1900 degrees, with high mechanical strength and long-term use.
Features of refractory high alumina balls
- The specific surface area can reach 240m2/m3.
- Numerous heat storage balls divide the airflow into small flow units, and the airflow forms strong turbulence when flowing through the heat storage body, which effectively breaks through the surface layer of the surface of the heat storage body, and because of the small ball diameter, small conduction radius, small thermal resistance, high density and good thermal conductivity, it can realize the frequent and fast change of direction of the heat storage burner.
- The heat accumulator can be used for 20~30 times/h change of direction, and the high temperature flue gas can be discharged to about 130℃ after flowing through the bed of heat accumulator.
- The high temperature gas and air flowing through the accumulator can be preheated to only about 100℃ lower than the flue gas temperature in the same path, and the temperature efficiency can reach more than 90%.
- The heat accumulator ball has the characteristics of anti-oxidation and slag resistance.
Parameters of refractory high alumina balls
| Item | High alumina | Low creep | Mullite | Corundum |
| Size(mm) | 40-80 | 40-80 | 40-80 | 40-80 |
| Al2O3(%) | 65 | 70 | 75 | 95 |
| Refractoriness under load(°C) | 1450 | 1460 | 1530 | 1650 |
| Apparent Porosity(%) | 25 | 23 | 22 | 18 |
| Bulk Density(g/cm3) | 2.3 | 2.4 | 2.5 | 3.1 |
| Cold crushing strength(Mpa) | 13 | 14 | 32 | 36 |
| Thermal shock resistance (1100°Cwater cooling) cycle ≥ | 15 | 10 | 20 | 7 |
| Refractoriness(°C) | 1710 | 1750 | 1800 | 1800 |