Dec 23, 2017 . Ball Mills. Rod Mills; Tube Mills; Pebble Mills; Wet or dry grinding; Method . In all ore dressing and milling Operations, including flotation, ball mill and classifier, as high as 70 per cent of the free gold and If finer grinding is wanted two or three stage grinding is advisable as for instant primary rod mill.
In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . The process of panning and sifting for gold uses both of these methods. . Crushing and grinding are the two primary comminution processes. . gyratory crushers and cone crushers whereas rod mills and ball mills, closed circuited.