Eddy current non-ferrous separators have a conveyor belt system with a rapidly rotating magnet rotor containing magnetic poles that generate an induction field. For more information: https://www.goudsmitmagnets.com/solutions/magnetic-recycling-sorting/eddy-current-separators In this manner it is possible to separate a great many non-ferrous metals (and non-ferrous alloys), including aluminium, copper and brass.