Wet Low Intensity Magnetic Separator

Metso has produced wet low intensity magnetic separators for dense media recovery since mid 1960. 

These separators have earned recognition in the industry for highest reliability and performance. 

The magnetic system produces a magnetic flux density measured in Tesla or Gauss and a magnetic field gradient (T/mm or G/mm). 

Generally, smaller pole pitches produce a lower flux density but a higher gradient. The smaller pole pitch normally has a higher magnetic attraction (expressed as B • dB / dx) close to the drum which decreases rapidly with the distance away from the drum. 

Hence, the smaller pole pitch (referred to as high gradient, HG) has a greater ability to pick up finer or less magnetic particles but has a lower throughput capacity when compared to a magnetic assembly with a larger pole pitch. 

The heart of the magnetic separator is the Magnetic Drum Assembly which is composed of a stationary magnetic array mounted inside of a non-magnetic drum. During operation, the drum revolves around the magnetic assembly thereby transporting magnetically attracted material on the drum to the area designated for discharge. 

The drum heads are normally cast from nonmagnetic Aluminum alloy and the drum shell is manufactured from non-magnetic stainless steel. Drum shells are normally rubber or stainless steel covered against abrasion. 

The magnetic system has alternating polarity and is available in two versions - High Capacity (HC) and High Gradient (HG). The HC is normally used in dense media circuits, while the HG is used for recovery of media in very dilute streams.