SMPA is a self-cleaning rare earth magnet system with a belt mounted over the conveyor.

Processed material, moving on the conveyor belt, enters the powerful magnetic field of SMPA, where ferromagnetic inclusions get attracted to the surface of the circulating separator belt, and rubber cleats remove ferrous particles from the magnetic field and let them fall into a special container.
Non-magnetic separated material passes on the conveyor and goes to the next operating stage.