Available sizes of type BS-64 grinding balls: 3 mm, 6 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, 60 mm and 70 mm. Minimum order quantity 100 kg per size. BS-62 grinding balls are available in 6, 8, 10, 12.5, 15, 20, 25, 30 and Isostatic Pressed sizes 40, 50 and 60mm to meet the most demanding applications for dispersion and particle size reduction. For BS-62 there are also cilinder shaped media available
Main specifications of Steatite Grinding Balls Type BS-64 and BS-62
| Material Properties | Units | BS-64 | BS-62 |
|---|---|---|---|
| Specific gravity | g/cm3 | 2,55 | 2,7 |
| Open Porosity | max. Vol.% | 0 | 0 |
| Flexural strength | Mpa | 80 | 130 |
| Compressive strength | Mpa | 850 | |
| Young modulus | min. N/mm2 | 120 | |
| Coefficient of lineair thermal expansion (20ºC to 600ºC) | 10(-6)/K | 7 – 9 | |
| Co-efficient of lineair thermal expansion (20ºC to 1000ºC) | 10(-6)/C | 8.5 | |
| Vicker’s hardness | HVs(kg/mm2) | 520-550 | |
| Mohs hardness | Scale | >7 | 7 |
| Thermal Conductivity (20ºC to 100ºC) | W/m.K | 3 | |
| Max safe operation temperature (no load) | W/Celsius | 1050 | |
| Cum wear loss/hr after 120 hrs of wear test | Percent | 0.025 |
| Chemical and Main Specification | BS-64 | BS-62 |
|---|---|---|
| SiO2 | max. 64% | max. 61.5% |
| MgO | max. 31% | max. 27.4% |
| AL2O3 | 4% | 6.8% |
| BaO | 3.2% | |
| Fe2O3 | <1.4% | 0.5% |
| Na2O + K2O | 1.2% | 0.1% |
| CaO | 0.5 |
Example of Steatite Grinding ball 70mm BS-64 70mm. Its weight is approx 470 grams a piece.