SU1297908A1 - Electrodynamic separator - Google Patents

Abstract

The invention relates to the field of enrichment of minerals and allows increasing the efficiency of separation by increasing the induction of the magnetic field in the separation zone and reducing the specific energy consumption for separation. In the drum (B) 2 of the separator, an alternating current electromagnet 3 is installed with an inter-polar air gap. Inside it is installed a hub 4 of an electromagnetic floor in the form of a coil of stranded wire with insulated from one another WITH

Description

and adjustable inductance (I), connected in series with the coil. The hub 4 is equipped with two additional turns 8 and 9 of the stranded wire with insulated from each other conductors with additional adjustable AND, IC-bulged in series with turns 8 and 9. Moreover, turns 8 and 9 are installed outside B 2 symmetrical to the axis of the interpolar air gap. upload1

The invention relates to the field of mineral processing and can be used to separate non-magnetic materials according to electrical conductivity, for example, in the separation of native gold.

The purpose of the invention is to increase the separation efficiency by increasing the induction of the magnetic field in the zones.

separation and reduction of specific energy 1

cost-sharing.

. Fig. 1 shows the electrodynamic separator in Fig. 2 — the same, an embodiment;, FIG. 3 is an electrical diagram of a hub of an electromagnetic field.

The electrodynamic separator (Fig. 1) contains a loading device 1, a drum 2, an AC electromagnet 3 with an air inter-pole gap, a hub 4 of an electromagnetic field, a cut-off 5 and receiving bunkers 6 and 7 for electrically conductive and non-conductive particles. The hub 4 of the electromagnetic field is made in the form of a coil of stranded wire with insulated from each other conductors (for example, from litsendrat). A coil forms with a series-connected adjustable inductance L and a variable resistor R a closed loop.

In addition, in the electrodynamic separator (FIG. 2), the concentrator of the electromagnetic field further comprises two turns 8 and 9 of the stranded wire with the cores insulated from each other. The coils are located

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zochny device 1

enters the surface of B 2. It rotates to transport them to the separation zone. By adjusting the closed circuits of the coils, they change the magnitude of the force electrodynamic effect on the electrically conductive particles. They are separated from the main stream. The cutter 5 separates the streams and directs the particles into the corresponding hoppers 6 and 7. 1C. f-ly, 3 ill.

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outside the drum 2 and installed perpendicularly magnetic power lines of the electromagnet 3 symmetrically with the axis of the interpolar air gap. Coils 8 and 9 form closed circuits with additional adjustable inductors L and variable resistors.

Electrodynamic separator works as follows. I The starting material, which is a mixture of particles with different electrical conductivities, from the loading device 1 enters the surface of the drum 2, which, rotating clockwise, transports the particles to the separation zone, i.e. to the area

non-uniform electromagnetic field. I

In the separation zone, eddy currents are induced in the electrically conductive particles, creating a secondary magnetic field, the interaction of which with the external (primary) inhomogeneous alternating magnetic field of electromagnet 3 gives rise to an electrodynamic force that pushes these particles towards the decrease in intensity of the inhomogeneous magnetic field and thereby separates them from flow of the original mixture. The cutter 5 separates the streams and directs the particles into the corresponding hoppers 6 and 7.

In the turn of the electromagnetic field concentrator, introduced into the interpolar gap of the electromagnet 3 ,. a current is also induced, the magnetic field of which prevents the passage of the internal interpolar magnetic flux of the electromagnet 3 through the area

coil. B. As a result, the magnetic flux is displaced onto the working surface of the drum 2, thereby increasing the magnetic induction and induction gradient in the separation zone;

By adjusting the inductance of the closed loop of the coil-concentrator 4 and its active resistance by adjusting the adjustable inductance and the variable resistor, you can adjust the amount of induction on the working surface of the drum 2, the degree of non-uniformity of the magnetic field of the electromagnet 3 in the separation zone and thereby selectively change the value of the power electrodynamic effects on electrically conductive particles, increase separation efficiency.

Additional turns 8 and 9 additionally increase the degree of heterogeneity of the magnetic field in the separation zone, the magnetic flux of the electromagnet 3 is deflected to the area of the separation zone. Adjusting the inductance and active resistance of the coils 8 and 9 allows one to achieve the required phase relation between the magnetic fields of the electromagnet 3 and the secondary magnetic fields of coils 8 and 9 and, therefore, allows the magnitude of the force effect of the non-uniform magnetic field of the electromagnet 3 to be out-of-phase. in the separation zone into electrically conductive particles, thereby increasing the separation efficiency.

Claims (2)

1. Electrodynamic separator containing a loading device, a drum and an alternating current electromagnet installed in it with an interpolar air gap, inside which there is an electromagnetic field concentrator, a cutter and receiving hoppers for electrically conductive and non-electrically conductive particles and and with that, with In order to increase the separation efficiency by increasing the magnetic field induction in the separation zone and reducing the specific energy consumption for separation, the electromagnetic field concentrator is designed as a coil of stranded wire with insulated from each other and an inductance connected in series with the coil. 2. A separator according to claim 1, characterized in that the concentrator is provided with two additional turns of stranded wire with insulated from each other, with additional adjustable inductances connected in series with the turns, the coils being installed outside the drum symmetrically with the axis. interpolar air clearance. uz, Editor A. Petrov Compiled by V. Morozov Tehred A. Kravchuk Proofreader I. Muska Order 843/9 Circulation 512 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. / d, 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fig.Z