Apr 24, 2012· / Dryers. / POLYCOM® copper ore, gold ore, iron ore and other mineral materials. The mill shells are delivered g ood accessibility of the mill interior. / flanges are fewer Small production ball mill for ore grinding. Nov 16, 2016 This is a new product we are developing. It is a 3'x6' continuous ball mill for small scale production at about 1 tph.