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Product introduction of high aluminum refractory ball
High alumina refractory ball, also known as spherical heat accumulator, is made of industrial alumina and refractory kaolin as the main raw materials, through scientific formulation, molding, high temperature calcination. High alumina refractory ball 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.
Features of high aluminum refractory ball
Resistance to corrosion
Good thermal conductivity
Thermal expansion coefficient is small
Good thermal shock stability
Application of high aluminum refractory ball
High aluminum refractory ball is suitable for regenerative heating furnace in iron and steel industry, regenerative melting furnace in non-ferrous metal industry, and can also be used in large forging plant regenerative trolley furnace, regenerative electric boiler, regenerative incinerator and other industries as heat storage carrier.
Parameters of high alumina refractory fire 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 |