Ultra fine grinding of intermediate flotation concentrates in .
ULTRA FINE GRINDING OF INTERMEDIATE FLOTATION CONCENTRATES 41 not dissimilar way to the Metso SMDTM. The mill was filled with a 70% ceramic grinding media charge with the media having an SG of Thickened feed was pumped into the bottom of the mill and the mill product overflowed through retaining screens at the top of the mill.