RU1775173C - Electric separator - Google Patents

Abstract

Usage: separation of materials in the mining industry in the processing of polymetallic ores. SUMMARY OF THE INVENTION: A separation chamber with deflecting electrodes in the form of separate elements is installed under the feeder. The separator is equipped with an AC source. Each of the elements of the electrodes is mounted horizontally and connected to an alternating current source. Under the separation chamber, receivers of separation products are arranged. The electrodes may be insulated. The frequency of the voltage of the alternating current source is equal to the natural frequency of the material of the separated fraction. When falling from the feeder into the chamber, the particles to be separated due to polarization interact with the electrodes, particles are scattered, Particles with resonant dielectric permittivity fall into the outermost cells of the receiver. The remaining particles fall into the middle cells of the receiver. 2 ill.

Description

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The invention relates to devices for the separation of solid materials, and more specifically to electrostatic separators, and can be used, in particular, in the mining industry for the processing of polymetallic ores.

The aim of the invention is to increase the separation efficiency.

The goal is achieved in that the separator is provided with an alternating current source, and the deflecting electrodes are made in the form of separate elements, each of which is installed horizontally and connected to an alternating current source.

Figure 1 shows the proposed separator; Fig. 2 is a graph of the statistical dependence of the number of particles on the deviation for 2 values of the dielectric constant of the particle material (i.e. 2 different materials).

The separator comprises a feeder, for example, in the form of a conical hopper 1 connected to a separation chamber 2. The chamber 2 is located under the hopper 1 and is equipped with deflecting electrodes 3 made in the form of separate elements, each of which is installed horizontally and connected to an alternating current source (not specified). In particular, the deflecting electrodes 3 can be made in the form of rows of conductive wires spanned horizontally. The lower part of the chamber 2 is divided into cells 4, for example, using vertical strips 5. Each of the cells 4 is connected to a separate receiving hopper (not specified)

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The deflecting electrodes 3 can be made with an insulating coating.

The separator works as follows.

An alternating voltage is applied to the electrodes 3 from an alternating current source with a frequency equal to the natural frequency of the material of the separated fraction.

From the hopper 1, pre-crushed and sorted by particle size raw materials are poured into the chamber 2 on the deflecting electrodes 3. When particles fall through the rows of electrodes 3, the raw materials with a non-zero dielectric constant due to polarization of the particles interacting with the alternating electric field of the electrodes. Particle dispersion of the feed occurs. Moreover, particles with a lower dielectric constant are less attracted to the field of electrodes 3, i.e. they scatter less and are more likely to enter the middle cells 4, while particles having an eigenfrequency of the material equal to the frequency of the alternating field of the electrodes 3 enter the resonance, interact most effectively with the electrodes 3 and undergo maximum scattering. These particles fall mainly in the extreme cells 4.

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Thus, a fraction of a material with almost equal dielectric constant falls into each of cells 4. Next, from cells 4, the particles of materials of each fraction are fed into separate bins.

If finer separation is required, each of the fractions of the material can be further separated by the method described above.

If the feedstock consists of several materials with different dielectric permittivities (resonant frequencies), each of which is necessary, then by changing the frequency of the alternating current, all components of the feedstock can be distinguished.

Claims (1)

The claims An electric separator including a feeder, a separation chamber underneath the deflecting electrodes and receivers of separation products placed under the separation chamber, characterized in that, in order to increase the separation efficiency, the separator is equipped with an AC source and the deflecting electrodes are made as separate elements, each of which is installed horizontally and connected to an AC source. v AND FIG. Z