(1) According to the different carrier media, the magnetic separator can be divided into dry and wet: 1 Dry magnetic separator is used in air and is mainly used for sorting large and coarse grains of ferromagnetic and fine-grained weak magnetic ore. 2 Wet magnetic separator is used in water or magnetic liquid, mainly for sorting fine-grained ferromagnetism and fine-grained weak magnetic ore. [2] According to the magnetic field strength of the magnetic separator, the magnetic separator is divided into two categories: weak magnetic field separator and strong magnetic field separator: 1 weak magnetic field magnetic separator---the magnetic field strength H 0 of the magnetic pole surface is 80~120kA/m, and the magnetic field force (HgradH) is (3~6) X 105 kA2/m3 for ferromagnetic minerals and gangue minerals. Separation. 2 Strong magnetic field magnetic separator---The magnetic field strength H 0 of the magnetic pole surface is 800~1600 kA/m, and the magnetic field force (HgradH). It is [3 ~ 12] X 107 kA2/m3 for the separation of weak magnetic minerals and gangue minerals. [3] According to the way in which magnetic minerals are selected, they can be divided into: 1 Suction-type magnetic separator A selected material is given to a distance from the working magnetic pole or the transporting part. The magnetic ore particles are sucked out from the material and sucked on the working magnetic pole or the surface of the transporting component after a certain period of time. The quality of the concentrate of this magnetic separator is generally good. 2 Suction magnetic separator A selected material is directly applied to the working magnetic pole or the surface of the transporting member, and the magnetic ore particles are attracted to the working magnetic pole or the surface of the transporting member. The recovery rate of such a magnetic separator is generally high. 3 Suction bow magnetic separator A selected material is placed at a certain distance from the surface of the working magnetic pole. The magnetic ore particles are attracted to the surface of the working magnetic pole and discharged into a magnetic product under the action of gravity. (4) According to the direction of movement of the incoming material and the method of discharging the sorted product from the sorting area, it can be divided into: 1 Downstream magnetic separator - the selected material and the non-magnetic ore particles move in the same direction, and the magnetic ore particles deviate from this direction of motion. Such magnetic separators generally do not achieve high recovery rates. 2 The countercurrent type magnetic separator has the same moving direction of the selected material and the non-magnetic ore particles, and the moving direction of the magnetic product is opposite to this direction. The recovery rate of such a magnetic separator is generally high. 3 semi-reverse flow type magnetic separator A selected material is fed from below, while the magnetic or non-magnetic ore particles move in opposite directions. The concentrate quality and recovery rate of this magnetic separator are generally high. (5) According to the behavioral characteristics of magnetic ore particles in the magnetic field, they can be divided into: A magnetic separator having a magnetic inversion function. In this magnetic separator, a magnetic flux composed of magnetic ore particles is partially or completely destroyed during its movement. Conducive to the improvement of concentrate quality. 2 Magnetic separator without magnetic inversion In the magnetic separator, the flux linkage is not destroyed, which is beneficial to the improvement of the recovery rate. (6) According to the structural characteristics of the discharged magnetic products, it can be divided into: cylindrical, conical, belt, roller, disc and ring. (7) According to the type of magnetic field can be divided into: 1 constant magnetic field magnetic separator - the magnetic source of this magnetic separator is a permanent magnet and a direct current electromagnet, a solenoid coil. The magnitude and direction of the magnetic field strength does not change over time. 2 Rotating magnetic field magnetic separator--- The magnetic source of the magnetic separator is a permanent magnet with alternating polarity, which rotates rapidly around the axis. The magnitude and direction of the magnetic field strength changes over time. 3 alternating magnetic field magnetic separator---The magnetic source of the magnetic separator is an alternating current electromagnet. The magnitude and direction of the magnetic field strength changes over time. 4 pulsating magnetic field magnetic separator The magnetic source of a magnetic separator is an electromagnet that simultaneously transmits direct current and alternating current. The magnitude of the magnetic field varies with time, but the direction does not change. (8) According to the method of generating a magnetic field, the magnetic separator can be further divided into: a permanent magnet type magnetic separator, an electromagnetic type magnetic separator, a superconducting type magnetic separator, and the like. Magnetic separators for sorting weak magnetic ores generally use electromagnetic magnetic systems, and magnetic separators for sorting strong magnetic ores mostly use permanent magnet magnetic systems. 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Classification method of magnetic separation equipment
The structure of the magnetic separator is various and the classification methods are also numerous. It is usually classified according to the following characteristics.