The main magnetic disc is mounted in a trough. The slurry flows in from one end of the trough and passes through the gaps between the discs. Magnetic minerals in the slurry are adsorbed onto the surface of the discs, while the remaining non-magnetic minerals exit from the other end of the trough. As the magnetic discs rotate, the adsorbed magnetic minerals are lifted above the slurry surface. Upon entering the discharge zone, a non-contact, rotating discharge mechanism between the gaps of the discs throws the adsorbed magnetic minerals into a collection trough, where they are gathered for output.