Ball Mill Screening Stage. Ball Mill Discharge Trommel Screen The Ball Mill Discharge Trommel Screen Has Wide Application In Practically Every Type Of Placer Work In Gravel Plants And In Oredressing This Type Of Screen Is Particularly Adapted For Screening At Coarse Sizes Or At Finer Sizes If Spray Water Can Be Used Freely Without Interfering With Screening.The trommel flanges are precision machined for precise connection to upstream mill screening equipment. Online Service. Combined DEM and SPH simulation of overflow ball mill . Jul 01, 2017 The key dimensions of the overflow ball mill are given in Table 1. The mill trunnion extends a short distance inside the trommel screen to prevent material.