SU1537298A1 - Drum electric separator - Google Patents

Abstract

The invention relates to the enrichment of minerals and is intended for the separation of minerals by electrical methods, namely, electric separators for the enrichment or separation of particulate material (CM), can be used in the mining industry, the building materials industry and other industries. The goal is to increase the efficiency and reliability of separation by improving the cleaning of the precipitation electrode (E) from dielectric particles. Inside the housing 1, under the feeder 12, a grounded, cylindrical, cylindrical E 2 is rotatably mounted. In the first quarter, during the rotation E 2, the corona-forming 3 and the precipitation 4 charging electrodes are placed near its surface. Behind them, in the course of rotation E 2, E 5 cleaning is placed at its surface. E 3,4,5 are connected to a high voltage source. Receivers 6, 7, 8 of separation products are placed under O 2, over O 5 during the E 2 rotation, a slit nozzle 9 for supplying gas under pressure to it. The slot 10 of the nozzle 9 is directed towards the surface E 2. From the ends E 2 between E 3, 4 and 5, a partition 13 is installed. From the feeder 11, CM particles enter E 2 into the zone of action E 3, 4. Under the action of electric and centrifugal forces, the wire SM particles as a result of the charging and discharging process

Description

The invention relates to devices for the separation of materials by electrical methods, namely, electric separators for enriching or separating particles of loose material, and can be used in the mining industry, the building materials industry and other industries.

The purpose of the invention is to increase the efficiency and reliability of separation by improving the cleaning of the precipitation electrode from dielectric particles.

FIG. 1 shows a separator, a cross-section; in fig. 2 - section A-A in FIG.

The electric drum separator includes a housing 1, inside which the ground rotary cylindrical electrophone 2 is rotatably mounted. The charging electrodes — the corona-forming 3 and the deflecting 4 — are placed on the surface of the precipitation electrode 2 in the first direction of its rotation (indicated by an arrow ) quarter cylinder. The cleaning electrodes 5, for example, in the form of a thin corona wire, are placed behind electrodes 3 and 4 in the direction of rotation of the collecting elec- trode 2 at its surface. A high displacement or constant voltage source (not shown) is connected to electrodes 3-5 Receivers 6-8 of separation products are placed under the cylinder: for conductors 6, middling 7 and non-conductors 8

The separator is equipped with a slit nozzle 9 i 1I supplying gas to it under pressure, placed behind the cleaning electrodes 5, each rotating the collecting electrode 2 of the vapor. The nozzle slot 10 is directed to the side of the surface of the precipitation electrode 2 and is connected to an overpressure system (air duct) 11. Above -xic Kirode 2 is installed a feeder 12 for supplying the material to be separated to the electrode 2 From the ends of the collecting electrode 2 between the charging electrodes 3 and 4 and the cleaning type 5, a partition 13 is installed. The output of the separation products to receivers 6-8 is controlled by cutters 14 and 15

Separayur works as follows.

Particles of the material being separated from the pygalsl 12 are poured into the upper point of the rotating precipitation electrode 2, which is transported to the zone of the effect of the burial electrode 3, in this zone the particles are charged by means of gas from the forms of gas discharge - corona discharge. The particles then fall into the zones of action of the deflecting electrostatic electrode 4, in this zone the particles-conductors are discharged and, under the action of elec- tric and centrifugal forces, detach the n-from electrode 2 and enter the receiver 6 for the conductors. Non-conductive particles

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Nicknames, as well as dust (particles less than 30-50 microns) in the zone of action of electrode 4 do not have time to discharge and are retained by the electric forces of the mirror image and adhesion forces on electrode 2. Then the non-conductor particles and dust enter the zone of the cleaning electrodes 5 connected to an alternating or constant voltage generator, in this zone, non-conductor particles are discharged and dumped into receiver 8 for non-conductors.

However, the dust and part of the non-conductor particles in the electric field of the cleaning electrodes do not have time to be discharged or recharged due to the fact that for particles of different conductivity and size, the discharge time is different. The particles left on the electrode 2, due to the presence of electrical forces and adhesion forces, are blown off by a slot nozzle 9 connected to the system 11. The deionized gas coming from the slot 10 (air, argon) ensures the discharge of particles. Experiments have established that the excess pressure of the deionized gas is 0.2-1.0 atm. The maintenance of a constant pressure in Corvus 1 is ensured by the presence of holes in it or by forced suction of air (not shown). The partition 13 prevents the occurrence of gas vortex flows in the working area and disruption of the separation process. Particles with intermediate properties enter the receiver 7.

In the proposed separator, it is possible to achieve high efficiency and reliability of separation due to the absence of electrode wear and a high degree of cleaning of this electrode.

Claims (1)

Invention Formula Drum electric separator, which includes a housing inside which a grounded cylindrical cylindrical electrode is mounted for rotation, charging electrodes placed near the surface of the precipitation electrode in the first quarter along its rotation, cleaning electrodes placed behind them during the rotation of the precipitation electrode near its surface, a high voltage source connected to the electrodes and receivers of separation products, characterized in that, in order to increase the separation efficiency and reliability Due to the improved cleaning of the precipitation electrode from dielectric particles, the separator is equipped with a slit nozzle for supplying gas under pressure placed behind the cleaning electrodes during the rotation of the precipitation electrode, the nozzle slit facing the surface of the precipitation electrode and the partition installed at the ends of the precipitation electrode between charging and cleaning electrodes. I 13 g 15 ./J FIG. 2