... after selection5. Dam and backfill for gangueIn closed circuit grinding system, it features high classification efficiency and fine overfall fineness under ... to offer stand-alone, parallel connection machine or machine series in such specs as Φ50, Φ75, Φ100, Φ125, Φ150, Φ200, Φ ... selecting mine. After the classification by cyclone, coarse granule left in the bottom of dam, fine granule move to the tail ...