Neodymium ring magnets are circular in shape with a hole inside it. Large Neodymium ring magnet refers in particular to the Neodymium ring magnet with the large size. Large Neodymium ring magnets can be further divided to pure ring magnets and countersunk magnets base on the detailed shape of the inner hole. Large Neodymium ring magnets have earlier implemented near net-shape manufacturing. Almost entirely of large Neodymium ring magnets is magnetized along thickness direction. Magnetic separator can be considered as the most representative application of large Neodymium ring magnets. Large Neodymium ring magnets in magnetic separator are positioned on both sides of a high-permeability pole piece can generate higher magnetic field due to the poles were the same on each side. The ultra-high magnetic field can effectively capture and retain ferrous tramp contaminants from the flowing material stream of dry particulate, slurry, or liquid during the processing.

