SU1085633A1 - Electrostatic separator of free fall - Google Patents

Abstract

ELECTROSTATIC FREE SUPPORT SEPARATOR, including a feeder, electrodes of opposite polarity, each of which is made in a row of pipes of the same diameter, installed vertically for rotation, the electrodes are located under the feeder on opposite sides of it, brushes and receiving bunkers, differing in that, in order to increase the performance of the separator, each electrode is provided with an additional row of pipes, installed in a shah order with respect to the pipes of the main row, and the distance between ovnym and additional rows is 1.5-2.0 pipe diameter. (L

Description

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The invention relates to the separation of bulk materials in an electric field and can be used to electrically enrich minerals-dielectrics, in particular potash ones.

A separator is known for electrostatic separation of bulk materials with vertically located plate electrodes 1.

The disadvantage of this device is the low quality of the separation products.

The closest to the invention according to the technical essence and the achieved result is an electrostatic free fall separator including a feeder, electrodes of opposite polarity, each of which is made as a series of pipes of the same diameter, installed vertically for rotation, with the electrodes located under the feeder for different sides of it, brushes and receiving bins 2.

The known device is characterized by a lack of performance.

The purpose of the invention is to increase the performance of the separator.

This goal is achieved by the fact that in an electrostatic free fall separator, including a feeder, electrodes of opposite polarity, each of which is made in a row of pipes of the same diameter, mounted vertically for rotation, with the electrodes located under the feeder on opposite sides of it, brushes and receiving bins, each electrode is provided with an additional row of pipes installed in a staggered order with respect to the pipes of the main row, and the distance between the main and additional rows is Em, 5-2.0 pipe diameter.

FIG. 1 shows schematically the proposed electrostatic separator for enriching minerals-dielectrics; in fig. 2 - the same, top view.

The separator contains a feeder 1, electrodes of opposite polarity placed under it and on opposite sides of it. Each electrode consists of two rows of pipes. The left one is of rows 2 and 3, the right one is of rows 4 and 5. Each pipe is equipped with a cleaning brush 6.

The pipes are rotated by the electric drive 7. The enrichment products enter the receiving bins 8. The voltage on the electrodes is supplied from a high voltage source 9. The negative pole of the power source is connected to pipes 2 and 3, and the positive to pipes 4 and 5. Thus An electrostatic field is formed between the electrodes.

The separator works as follows.

Prepared in advance triboelectrically ore, for example sylvinite, is fed to feeder 1, from where it passes through the gap into the interelectrode working space formed by the main rows of tubes 3 and 4, where under the action of electric forces

Polarized particles deviate from the vertical and move towards the electrodes. The direction of their movement depends on the size and sign of the particle charge and the direction of the tension of the separator floor. In the vicinity of the main (inner) rows of pipes 3 and 4 of the genera, mineral particles experience an additional effect of the electric field created by additional rows of pipes 2 and 5, as a result of which conditions are created for the removal of particles from the inter-electrode space of the separator 3 and 4 without contact with their surface. Thus, there is a release of the area of the interelectrode space in the vicinity of rows 3 and 4, where a new particle flow rushes, freeing up the gap for the next flows. In this case, the best separation conditions are achieved when the axes of the pipes of additional rows 2 and 5 are shifted in the horizontal plane relative to the axes of the pipes of the main rows 3 and 4

half the distance between the axes of the pipes in the row, i.e. the pipes are arranged in a shahmatical order. The optimum distance between the rows of tubes of one electrode is 1.5-2.0 tube diameters. If the distance is less than 1.5 times the diameter, the gap is very small and the removal of particles is difficult. If the diameter is greater than 2.0, then the strength of the electric field in the gap between the rows of tubes of one electrode is small (the intensity of the electric field is small).

5 The proposed electrode design allows- to create a high-performance free-fall separator. Compared to the known, this separator allows an increase in productivity by 10%.

Claims (1)

ELECTROSTATIC FREE DEPARTMENT SEPARATOR, including a feeder, electrodes of opposite polarity, each of which is made in the form of a series of pipes of the same diameter, mounted vertically with the possibility of rotation, and the electrodes are located under the feeder on different sides of it, brushes and receiving hoppers, characterized in that , in order to increase the performance of the separator, each electrode is equipped with an additional row of pipes staggered in relation to the pipes of the main row, and the distance between the main and additional rows is 1.5-2.0 pipe diameter. $ / 7. / i