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PTMS MAGNETIC SEPARATOR

what is magnetic separation in chemistry？

The main condition for sorting minerals by magnetic separation is magnetic force, and the magnitude of the magnetic force is related to both the magnetic properties of the mineral and the magnetic field characteristics of the magnetic separator. The magnetic field characteristics mainly refer to the variation law of magnetic field strength and magnetic field gradient in the magnetic field space and its influence on the magnitude and distribution of magnetic force. The magnetic field is divided into a uniform magnetic field and a non-uniform magnetic field. In a uniform magnetic field, the magnetic field strength and direction of each point are the same, so the magnetic ore particles located therein are subjected to the same magnitude of gravity and repulsive force, and are only rotated by the action of the torque, and when they are in the same direction as the magnetic field, When it stops, the ore does not move, that is, it is not sucked by any magnetic pole. In a non-uniform magnetic field, the magnitude and direction of the magnetic field strength change point by point. In addition to the torque effect, the magnetic ore particles are also subjected to the action of magnetic force, so that the ore particles are in a high magnetic field strength from a ground direction with a low magnetic field strength. mobile. In the magnetic separator, magnetic magnetic particles are attracted by magnetic force, thereby achieving the purpose of separating magnetic minerals from non-magnetic minerals. Therefore, only a non-uniform magnetic field is used in the magnetic separator, because the more uneven the magnetic field, the greater the magnetic force acting on the magnetic ore particles. The non-uniformity of the magnetic field strength is expressed by the magnetic field gradient. The magnetic field gradient is the amount of change in the magnetic field strength along the normal direction of the magnetic pole expressed by dH/dx (or gradH). In a non-uniform magnetic field, the magnitude and direction of the magnetic field strength at each point are different, that is, dH/dx≠0. The larger the dH/dx, the greater the non-uniformity of the magnetic field; conversely, the smaller the non-uniformity of the magnetic field. [Knowledge Development] The specific magnetic force acting on the magnetic ore particles is proportional to the specific magnetic susceptibility k of the ore particles, that is, the stronger the magnetic properties of the ore particles; the greater the magnetic force received. The specific magnetic force is proportional to the product of the magnetic field strength and the magnetic field gradient of the ore particles (ie, the magnetic field magnetic force), that is, the greater the magnetic field strength, the larger the magnetic field gradient, the greater the magnetic force of the ore particles. The magnetic properties of the ore itself are the main basis for the magnetic separation. If the magnetic properties of the ore particles are very weak, the magnetic force received in the magnetic field of the magnetic separator is small, and the ore particles are difficult to select. The magnetic field strength and magnetic field gradient are the main indicators of the magnetic field performance of the magnetic separator. When designing the magnetic separator, it is necessary to increase the magnetic force of the magnetic field, thereby expanding the variety of sorting minerals and improving the production capacity of the equipment.