SU1519776A1 - Method and apparatus for electrodynamic separation - Google Patents

Abstract

This invention relates to the separation of materials according to electrical conductivity in a traveling magnetic field. The purpose of the invention is to increase the efficiency of the separation process by expanding the size class of recoverable electrically conductive particles. To do this, the material is affected by a running magnetic field in two stages. At the first stage, the material is acted upon by the running field continuously, and at the second stage it is impulsively triggered by the commands of the metal detector. A device for carrying out the method includes a conveyor 1, under which inductors (I) 2 and 3 are located. The first along the material course, And 2 is connected to the three-phase network continuously, and AND 3 is connected to the network by commands of the metal detector. A winding 4 of the second AND 3 is used as the sensitive element of the metal detector. The initial material is fed by the conveyor 1 to the zone of first AND 2 and then AND 3. The field AND 2 continuously affecting the material removes 40-60% of conductive particles, which reduces the frequency of their arrival. and 3. When the conductive particle passes over AND 3, the metal detector connects it to the network. Since the inrush currents are several times more established, in the zone of action And 3 the conductive particles are removed, which were not extracted in the zone II 2. 2 p. f-ly, 2 ill.

Description

dga

ate

about 1

but

The invention relates to pa3AejieHHro materials on electrical conductivity in a traveling magnetic field and can be used in the processing of municipal solid waste and non-ferrous scrap.

The purpose of the invention is to increase the efficiency of the separation process by expanding the size class of recoverable electrically conductive particles.

FIG. 1 shows a device that implements the proposed method, a general view; in fig. 2 metal detector.

With the electrodynamic separation method, the source material is fed into the working area and is exposed to a running magnetic field in two stages, and the first stage affects the material continuously, and at the second stage, pulses the commands of the metal detector.

A device for electrodynamic separation that implements the method comprises a feeder in the form of a conveyor belt 1, along which solid material to be separated moves, the first linear inductor 2 permanently connected to the network and operating in continuous mode, the second linear inductor 3 of increased power operating in pulse mode, and a metal detector, the sensitive element of which is the winding 4 of the second, 1-line () inductor 3, and the analyzing unit 5 can be located, for example, at the electrodynamic control station special separator.

The metal detector of the device for electrodynamic separation can be performed as shown in FIG. 2. Winding 4 of the second linear inductor 3, serving as a sensitive element of the metal detector. together with the windings and high-frequency transformers t and 7 and capacitors 8 included in the analyzing unit 5, form a resonant circuit tuned to resonance in the absence of metal particles above the linear inductor 3. In addition, the high-frequency generator 9 enters the analyzing unit 5 from which the high-frequency signal enters the resonant circuit through the transformer 6, the rectifier 10, into which the measured signal comes from the resonant circuit through the measuring transformer 7, the threshold device, comparator 11, compares Measured signal with reference and producing depending on the presence or absence of meta. 1L above the linear inductor 3, a command to turn on or turn off the switching device 12. Power supply 13 is used to power the electrochemical elements of the analyzing unit 5 of the metal detector.

The method of electrodynamic separation is carried out as follows.

0 5 o

0

five

0

1, the material to be separated is conveyed by conveyor belt 1 to the separation zone. The first inductor 2 of the separator, which is permanently operated, continuously acts on the material with a running magnetic field and extracts a significant part (up to 40–60%) of non-ferrous metal scrap, reducing the frequency of metal particles entering the second inductor 3 about n times and thus creating for reliable and efficient operation of the metal detector and the second linear inductor 3 in the second stage of electrodynamic separation. The metal particles that were not removed at the first stage of separation, moving along the belt 1, fall into the action zone of the second linear inductor 3 and the metalloskatel. When metal particles appear above the second linear inductor 3, its winding 4 parameters change, which leads to a change in the current in the resonant circuit. The analyzer unit 5 metal detector fixed this change and generates a command to turn on the switch 1 / device, providing a linear connection of the high-power inductor 3 to the network. After removing the particles of non-ferrous scrap (leaving it from the zone of action of the linear inductor 3), the resonance mode in the circuit including the winding 4 of the linear inductor, the windings of transformers 6 and 7 and the capacitors 8 is restored. The analyzing unit 5 fixes it and breaks out the command to switch the switching element off. device 12 and disconnecting the second linear inductor 3 from the network. Thus, in the proposed device, the electromagnetic processes in a single inductor 3 not only do not interfere with the operation of the metal detector, but also carry information about the presence or absence of 3 metal particles above the inductor. Due to the impulse switching on of the linear inductor 3 on the normal power, the extraction force can be increased by 3-5 times, which leads to an increase in the percentage of metal recovery.

Claims (2)

1. (Electrodynamic separation tool, nk. 1uchayuschie supply of source material into the working area and exposure to a running magnetic field on the commands of the metal detector, characterized in that, in order to increase the efficiency of the separation process due to the expansion of the class of redness, ee; 1 particles, the first step is carried out in two stages, and in the first stage, the material is continuously affected by the field, and in the second stage - pulsed, by commands of the metal detector. 2. A device for electrodynamic separation, including a feeder in the form of a conveyor belt1 × 1, a metal detector with a sensitive element and an inductor running magnetic field containing a magnetic conductor and a winding, characterized in that, in order to increase the efficiency of the separation process by expanding the size class of recoverable electrically conductive particles, it is equipped with an additional inductor installed in front of the main. movement of the source material, with the winding of the main inductor used as a sensitive element of the metal detector. yy . Chg M  7 & / 12 five  X / / 7J ten -G / // FS / G.2