Types of magnetic separator
Magnetic separators can be classified into low- and high-intensity machines, which may be further classified into dry-feed and wet-feed separators. Low-intensity separators are used to treat ferromagnetic materials and some highly paramagnetic minerals.
Dry low-intensity magnetic separation is confined mainly to the concentration of coarse sands which are strongly magnetic, the process being known as cobbing, and often being carried out in drum separators. Below the 0.5 cm size range, dry separation tends to be replaced by wet methods, which produce much less dust loss and usually a cleaner product. Low-intensity wet separation is now widely used for purifying the magnetic medium in the dense medium separation process, as well as for the concentration of ferromagnetic sands.
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