The main materials of high alumina refractory ball are industrial alumina and fire-proof kaolin, it is made by scientific formula, molding, and high-temperature calcination. Its maximum refractoriness can reach 1900℃. It is of high mechanical strength, long service life, good chemical stability, high-temperature resistance, etc.
Application:
Refractory balls include ordinary refractory balls and high alumina refractory balls. The ordinary refractory ball is suitable for the converter and shift converter of the sulfuric acid and fertilizer industry. High alumina refractory ball is suitable for the hot-blast furnace, heating shift converter, and other equipment of the urea and steel industry.
Standard size:
1”, 2”, 3” (inch). Special size and OEM Service also provide!
| 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 |
