Ball mill 2740 (400kw): feed fineness: Fso=35.21 m (-101m41.98%)
Cyclone overflow: P8o-22.06m (-10um55.40%)
ALC1500L Ai Sand Mill (560kw): Feed fineness: Fao=35.35um (-10 m44.67%)
Ore discharge fineness: P80=14.68m (-10um66.80%)
---Increase fineness (-10 m content) by 11.4 percentage points
| Lead coarse concentrate | Ball milling process | Re grinding of coarse concentrate from Ai sand mill |
| fineness(-10μm %) | 55.4 | 66.8 |
| Lead grade( % ) | 25 | 41 |
| Zinc recovery rate( % ) | 87.4 | 90.4 |
