The magnetic system is the main part of the magnetic separator, magnetic separator performance is not only related to magnetic materials and magnetic characteristics, but also with the structure of the magnetic system has a great relationship.
Weak magnetic separators are generally designed to open the magnetic system. The magnetic pole and the base plate and the magnetic moment formed by the permanent magnet block are bonded together. This is a three pole magnetic system, due to the large magnetic resistance of the air, so the formation of the magnetic field is weak.
The closed magnetic system is easy to generate strong magnetic field due to the small air gap between the magnetic poles. So the strong magnetic field magnetic separation of the weak magnetic minerals is designed as a closed magnetic system. In order to further improve the magnetic field force of the closed magnetic system, the air gap can be reduced, thereby reducing the magnetic field of the magnetic field. But it will make the separation space decreases, reducing the equipment processing capacity, so the improvement of the magnetic pole from the form and its size, and placed in the two magnetic permeability between high magnetic media to improve magnetic force. Such as a whole has a certain shape of the induction medium in the two original pole (roller, cone or disc) constitute a magnetic circuit, can also be placed with a plurality of induction medium with a certain shape in the original pole (tooth plate, spherical and cylindrical or net) constitute a magnetic circuit.