Aggregate and Quarrying

Tramp metal damages conveyors, crushers, screens and other processing equipment.  The damage is often costly and interrupts production.  The installation of Magnetic Separators and Metal Detectors find and remove tramp metal, eliminating such problems.


Technical Articles

Typical Applications:


Magnetic Separators attract and remove ferrous metal contamination from conveyed quarried rock.  Typical methods include:

  • Suspending a Permanent Overband or Suspension Magnet (i.e. self-clean or manual clean) or Electro Overband or Suspension Magnet across or over a conveyor. Ferrous tramp metal is lifted off the conveyor belt and out of the conveyed rock with the metal either held securely on the magnet face (for manual cleaning) or automatically discharged (in self-cleaning versions);
  • Replacing a conveyor’s head pulley with a Pulley Magnet. Ferrous tramp metal is attracted to the magnetic field of the Pulley Magnet, held on the surface of the moving conveyor, and deposited underneath the conveyor out of the product stream;
  • Feeding material onto a heavy duty Drum Magnet. Rock is fed, usually via a Vibratory Feeder, onto the rotating surface of a Drum Magnet.  Magnetic tramp metal is attracted to the strong magnetic field of the stationary magnetic element inside the rotating Drum shell and deposited underneath and away from the product;

Metal Detectors are commonly used alone or alongside Magnetic Separators to detect all tramp metal such as digger teeth (manganese steel).  The Metal Detector can either be mounted around or underneath the conveyor.  Tramp metal passing through the metal detector alter the magnetic field, which then either stops the conveyor or initiates a rejection of material.