SU973166A1 - Electromagnetic separator - Google Patents

Description

one

The invention relates to mineral processing technology, in particular, to the design of magnetic separators, and can be used for separation. laziness of a mixture of magnetic materials for different fractions by the magnitude of the magnetic susceptibility.

Known electromagnetic separator., Including a magnetic system of a running floor, feeder and receivers of separation products I.

A disadvantage of the known device is the low efficiency of the separation process.

The closest in technical essence and the achieved result is an electromagnetic separator containing a feed hopper, an obliquely mounted working body, a magnetic system including a magnetic conductor with pole pieces and an excitation winding, and discharge bins 2.

The disadvantage of this device is the low efficiency of the separation process.

The purpose of the invention is to increase the efficiency of the separation process due to the weakening of the magnetic field in the course of movement of the material being separated.

The goal is achieved by the fact that the electromagnetic separator

10 containing a feed funnel, an obliquely mounted working body, a magnetic system, including a magnetowire with pole tips and

, 5 excitation winding, and discharge bins, equipped with a magnetic shunto connected to pole pieces. In addition, the field winding is connected to a variable source.

20 current through the breaker and capacitor.

Figure 1 shows the separator, a longitudinal section; figure 2 - section aa in figure 1. 39 The proposed electromagnetic capacitor consists of a feed hopper 1, discharge hoppers 2 and 3 for particles with smaller and greater magnetic susceptibility, respectively, magnetic circuit k, excitation winding 5, non-magnetic gasket 6, pole pieces 7, capacitor 8, power interrupter 9, magnetic shunt 10 and the separating knife 11. The magnetic conductor k,, the pole pieces 7 and the non-magnetic gasket 6 form an inclined mounted working body of the separator. The magnetic core k is made U-shaped from a sheet of transformer sheet steel. Excitation winding 5 is located on the magnetic circuit. To the poles of the magnetic circuit k there are adjacent pole pieces 7, which have the form of triangular prisms and are filled from a package of sheet steel of transformer steel. A non-magnetic gasket 6 is located in the upper part of the pole nozzles 7. The magnetic core is shorter than the pole tips 7- At one end of the pole pieces 7, the top of the charging funnel 1 is mounted on top, and at the opposite end (bottom) of the pole tips 7 are connected by a magnetic shunt 10. Under the pole ends The tips 7 dispose bunkers 2 and 3, to the side adjoining walls of which the separating knife 11 is hinged. The excitation winding 5 is connected to the capacitor 8 and to the output of the power supply interrupter 12 in the stroke of which is connected to the alternating current source. The capacitor 8 with the excitation winding 5 forms a resonant circuit tuned to the frequency of the power supply. The electromagnetic separator operates as follows. A mixture of materials with different magnetic susceptibility is loaded into the funnel 1, from where it enters the space between the pole tips 7. Particles with lower magnetic permeability fall into the discharge bin 2, and with greater magnetic permeability are attracted to the pole tips 7. At the same time particles with higher magnetic permeability form magnetic floccules that can trap and particles with lower magnetic permeability. At this time, the breaker 9 turns off the power supply to the excitation winding 5, the magnetic floccules under the influence of gravity come off from the pole pieces 7 and, interacting with the opposite flow of ambient air, they fall apart. The pause in the power supply is chosen in such a way that the magnetic particles during the free fall time could not get out of the magnetic field. When the electric supply is resumed, particles with a higher magnetic susceptibility are again attracted to the pole tips 7, and the released particles with a smaller magnetic susceptibility fall into the discharge bin 2. When the excitation winding 5 is periodically turned on and off, the magnetic flocks and separation from them of particles with a lower magnetic susceptibility. The magnetic parts, with more magnetic susceptibility, periodically separating from pole nakinechnik 7 and again attracting them, move along pole tips 7. The presence of a magnetic shunt 10, connecting the pole tips 7. At their lower end, leads to , - that the force acting on the particle from the magnetic field, when it moves along the pole tips 7, weakens and becomes insufficient to return the particle to the pole tips 7. At the same time, particles with a greater magnetic susceptibility When moving away from the pole tips 7 and falling into the bunker 3, when the power supply is disconnected in the resonant circuit formed by the excitation winding 5 and the capacitor 8, the alternating current stops not instantaneously but gradually decreases to a zero time, which leads to a smooth decrease in the magnetic field strength. in the zone of pole pieces 7 and the complete demagnetization of the magnetic circuit, pole pieces and particles, which, in turn, ensures the separation of all particles from pole pieces 7. By turning the separating knife 1 1 and by adjusting the current in the winding, the excitation achieves the greatest

Claims (2)

Claim 1. An electromagnetic separator containing a loading funnel, an obliquely mounted working element, a magnetic system including a magnesium 973166 pole conductor with pole tips and an excitation winding, and discharge hoppers, distinguishing with the aim of increasing the efficiency of the separation process by weakening the magnetic field in the direction of the shared material, the separator is equipped with a magnetic shunt connected to ¹⁰ pole tips. 2. The separator according to claim 1, with the fact that the field winding is connected to an AC source through a chopper ¹⁵ and a capacitor.