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Brief introduction of high aluminum refractory ball
High aluminum refractory ball, also known as spherical heat accumulator, has the characteristics of low shrinkage of reburning line, high softening temperature under high temperature load, corrosion resistance, high strength, large heat storage, good thermal shock stability, good thermal conductivity, small thermal expansion coefficient and so on. It is a good refractory material with good performance.
Application of high aluminum refractory ball
High alumina refractory ball is made of industrial alumina and refractory kaolin by scientific formulation, forming and high temperature calcination. High aluminum refractory ball has the characteristics of high mechanical strength, long service cycle, good chemical stability, high temperature resistance and so on. It is suitable for hot blast furnaces, heating converter furnaces and other equipment in urea, steel and other industries.
Parameters of high alumina refractory ball
| 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 |