SU1639758A1 - Apparatus for separating mineral mixtures - Google Patents

Abstract

The invention relates to magnetic enrichment and makes it possible to increase the efficiency of the separation process by improving the unloading conditions of ferromagnetic particles. The device includes a main magnetic conductor (MP) 1 with windings 2 laid in grooves 3-14, an additional MP 15 with winding 16 placed in slots 17-28, a source 29 of three-phase voltage, starter 30 and an alternating shunting unit consisting of from the generator 31 control pulses and relays 32 with three pairs of contacts 33-38. The starting material is fed from a hopper. When the actuator 30 is closed, the voltage is applied to the relay 32, which causes the contacts 33 and 35 to open and the contacts 36-38 to close. This creates a traveling magnetic field along the entire length of the MP 1 and on the part of the MP 15 bounded by the grooves 20-28. Non-ferromagnetic particles roll into the receiver of the non-ferromagnetic fraction, and ferromagnetic particles move to the end face of MP 1 and accumulate there. After that, the generator 31 sends a signal to the relay 32, which leads to the opening of the contacts 33-35 and the closure of the contacts 36-38. As a result, the winding in the slots 12-14 is de-energized, and the winding 16 is entirely under voltage. The ferromagnetic particles under the action of MP 15 forces jump onto it and move to the receiver of the ferromagnetic fraction. Then the cycle repeats. 3 il. (Ls

Description

The invention relates to magnetic enrichment and can be used for the separation of mineral mixtures of various sizes.

The purpose of the invention is to increase the efficiency of the separation process by improving the conditions for unloading conductive particles.

Figure 1 shows the device, a General view; figure 2 is the same, longitudinal section; in Fig.3 is an electrical diagram of the magnetic system of the device.

The device includes a main electromagnetic system with a magnetic circuit 1, with windings 2 laid in grooves 3-14, an additional electromagnetic system with a magnetic circuit 15 with winding 16, placed in grooves 17-28, a three-phase voltage source 29, a starter 30, a unit for alternately shunting part of the windings under the influence of a linear traveling magnetic field, they rush to the upper end of the main magnetic circuit, where some of them jump to an additional magnetic circuit, and some line up in flocs.

When enough ferromagnetic particles are accumulated at the end of the main magnetic circuit 1, the generator 31 generates a signal supplying voltage to the relay coil 32. The appearance of voltage on the relay coil 32 leads to the opening of contacts 33-35 and the closure of contacts 36-38. As a result of this, part of the winding 2 of the main magnetic circuit 1. laid in the grooves 12-14, is de-energized, and the winding 16 of the additional magnetic circuit 15, on the contrary, is completely energized. Ferromagnetic particles accumulated on the upper end of the main electromagnetic systems located in the grooves 11-14 of the main magnetic circuit 1 and the windings located opposite them in the grooves 17-20 of the additional magnetic circuit 15 in a plane perpendicular to the surface of the magnetic circuit. The alternating bypass unit includes a control pulse generator 31 and a relay 32 with three pairs of switching contacts 33-38. The device has a hopper 39 for the source material and receivers 40, 41, respectively, for non-ferromagnetic and ferromagnetic fractions.

The device operates as follows. 35

When the contacts of the starter 30 are closed, a three-phase voltage is supplied from the source 29 to the windings 2, 16 of the magnetic circuits 1, 15 and single-phase to the power supply circuit of the control pulse generator 31. The last 40 at certain intervals generates voltage pulses supplied to the relay coil 32. Applying voltage to the relay coil 32 causes the contacts 33-35 to open and 45 contacts 36-38 to be closed.

Immediately after turning on the starter 30, the contacts of the relay 33-35 are closed and the contacts 36-38 are open. While shorted parts of the winding 16, placed in the grooves 17-19 of the additional magnetic circuit. The position of the relay contacts creates a linear traveling magnetic field along the entire length of the main magnetic circuit 1 and on the part of the additional magnetic circuit 55, limited by grooves 20-28. Non-ferromagnetic particles from the separated material supplied from the hopper 39, under the influence of gravity roll into the receiver 40, and the ferromagnetic particles of the magnetic circuit, cease to be affected by both the tangential and radial components of the traveling magnetic field created by the main magnetic circuit 1. Under the influence of the radial component of the traveling magnetic field created by the additional magnetic circuit 15, the ferromagnetic particles freely jump onto it from the main magnetic circuit 1 and under the influence of the radial component of the field of the additional magnetic circuit 15 rush to its upper end, where they accumulate in the receiver 41.

After transferring the ferromagnetic particles accumulated in the area between the magnetic circuits from the main magnetic circuit 1 to an additional 15, the relay coil 32 is de-energized by a command from the generator 31, contacts 33-35 are closed and contacts 36-38 are opened. The winding 2 of the magnetic circuit 1 is completely energized, and part of the winding 16 of the magnetic circuit ^ located in the grooves 17-19 is de-energized. Again, before the appearance of the signal generator 31, ferromagnetic particles will accumulate in the area between the magnetic cores.

Claims (1)

50 claims A device for the separation of mineral mixtures, including the main electromagnetic system with a magnetic circuit, in the grooves of which are placed the windings of a three-phase alternating current, an additional electromagnetic system with a magnetic circuit made with grooves, in which the windings of a three-phase alternating current are installed, parallel to the magnetic circuit of the main electromagnetic system above it, source three-phase AC voltage, feeder and receivers of separation products, characterized in that, in order to increase the effect the separateness of the separation process by improving the conditions for unloading ferromagnetic particles, the device is equipped with Figure 1 o ° o o o ° o o o o by a block of alternating shunting of part of the windings of the electromagnetic system located in the grooves of the main and opposite grooves of the additional magnetic cores in a plane perpendicular to the surface of the magnetic cores.