We have installed and used your Knelson CD12 anad CD20 concentrators to target free gold from jigs and flotation concentrates in the regrind circuit. The production from the gravity circuit accounted for up to 60% of the total production, with concentrate grades between 8,000 and 9,000 gr/ton. - Ruben Villanueva, Minas Arirahua - Peru ...more > >