SU48005A1 - Electrostatic separator - Google Patents

Description

The author's certificate J 45251 describes an electrostatic separator using two electrodes, one of which is grounded, and two conveyor belts: one to feed the material into the electric field and the other to remove the polarized grains from the field,

In this separator, in the separation process, the material is in a static state in the form of a continuous layer lying on a special, dielectric tape. During the passage in the electric field, the grains of the material are electrified and, overcoming the resistance of their own gravity and the resistance of a layer of grains that do not react to the electric field, raise the upper electrodes due to the force F defined by the expression:

where C is constant, depending on the size of the material in the form, e-dielectric constant on and -, is the gradient of intensity

electric floor.

In the proposed modification of the separator, the material is in a loosened suspended state, which is achieved by feeding the material with a vibrating column that is a simultaneously grounded electrode (the number of vibrations is about 3000 min), due to which the resistance of the layer of grains unresponsive to the electric field is reduced to zero, since during the stay in the electric field each grain is repeatedly in a state unrelated to the other grains. Since the grains in this case are all the time on the uninsulated vibrator electrode, the electrical force F acting on the grains is defined by the formula:

dF Ce- - | -Qm,

where is the electric charge of the grain, Q is the coefficient depending on the electrical conductivity, the shape and size of the grain, and the A is the distance between the electrodes. In this case, in order to obtain a non-uniform electric field, the non-grounded electrode is made of corrugated metal sheets. Thus, in the separator, according to the main proprietary certificate No. 45251, all the electrodes are stationary, while in this separator the grounded electrode is in continuous motion, which

2 creates gradient dynamics in tiCvtt

change and electrical agitation of the material.

. In FIG. 1 and 2 depict the general scheme of the separator (in two projections), and FIG. 3-9-various forms of electrodes.

The proposed separator is intended to enrich (separate) various materials consisting of components having different electrical properties. The material arrives from block A (Fig. 1) to a grounded vibrating electrode C, which is both a feeder and a conveyor, and is directed to a non-uniform electric field created by electrodes B and C.

Under the action of an inhomogeneous electric, the polarized particles rise to the upper electrode B and take the stripping tape to the receiver for tails. The movement of these particles is indicated by arrows x and dotted lines in FIG. 7 and 9. To create a non-uniform field and increase the tension at the upper electrode, various combinations of electrodes can be used, such as: 1) plane – shchary (Fig. 3) and 2) plane — curved surface (Fig. 4, 5, b , eight).

According to the invention, the electrodes on

FIG. 4, 5, 6, 8 are made of corrugated metal sheets.

In order to avoid overloading of the upper electrodes with material and deterioration of the quality of separation, the upper electrode in the plan has the shape of a trapezium (Fig. 7 and 9).

Slightly G10.1 polarized and non-polarized particles are transported to the receiver for concentrate I (Fig. 1).

The form of the projection of the upper electrode onto the lower one in the form of a trapezoid (Figs. 7 and 9) is meant to provide an opportunity to create a separator with any feed width, and therefore performance, since in this case an increase in the feed width does not overload the stripping tape.

The spherical shape of the electrodes (Fig. 9), with the same curvature of the surface and, .. the distance between the electrodes, creates a coefficient of inhomogeneity of the field,

proportional "while

how the other forms give the coefficient of heterogeneity of the electric field,

proportional - where r is the radius of curvature of the surface.

The subject matter of the invention.

Claims (2)

1. Change of electrostatic selearat according to the author's certificate No. 45251, characterized in that a vibrating trough, which is simultaneously grounded electrode, is used to feed the material into the electric field. 2. The form of the device according to claim 1, characterized in that in order to create an electric field uniformity, the non-grounded electrode is made of corrugated metal sheets ... to the dependent author I.S. Datsyuk and V. to the testimony of Ya. I. Zetler, Yu Pirker JMa 49005 figz oooooooooooooooooooooooooo 7 fig.O figs in MASHMA,