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PN series of slag limiting balls, with the features of high strength, high throwing accuracy and slag control efficiency, are specially designed for the slag control in converter.
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| Brand | PN-DZ3.0 | PN-DZ3.1 | PN-DZ3.2 |
| SiO2+Fe2O3 (%);≥ | 80 | 82 | 85 |
| Bulk density (g/cm3); ≥ | 4.00 | 4.10 | 4.20 |
| Modulus of rupture (MPa) ;≥ | 5 | 4 | 4 |
| Cold crushing strength (MPa) ;≥ | 15 | 15 | 15 |
