The magnetic separator is used for cleaning or before milling process to remove metal parts such as nails and screws that may be in granular products. The flow of material is evenly distributed in the centre of the apparatus, running on a permanent magnet that captures the metal parts. Efficient separation is possible despite the short magnets. The magnet can be easily removed together with the separate metal parts without interrupting the flow of material. The appliance is sealed to prevent external contamination.