INSTALLATION FOR SELECTIVE DISINTEGRATION OF MATERIALS Russian patent published in 2023 - IPC B02C19/18 

FIELD: devices for selective disintegration.

SUBSTANCE: invention can be used in the preparation of mineral raw materials for processing by various methods. An installation for implementing the selective disintegration of solid materials under the influence of a completed electric discharge in the pulp, including a pulp preparation unit, a generator of nanosecond high-voltage pulses, a magnetic compressor, inductive energy storage devices with a saturable magnetic circuit, high-voltage semiconductor current switches, a pipeline and a multi-electrode discharge cell. The pulp preparation unit is a tank with hemispherical bottom 1 and shaft 2 with several blades 3 located along the axis of the tank. Shaft 2 rotates using electric motor 4 with an adjustable rotation speed. Vortex-forming guides 5 are installed on the walls of the tank. Water is continuously supplied to this tank, the flow of which is regulated by dispenser 6; at the same time, dry material 7 is supplied to the tank. Dry material is pre-loaded into hopper 8. At the bottom of the bunker there is Archimedes screw 9, connected to the shaft of electric motor 10, which carries sand from the bunker into tank 1. The uniformity and volume of supply of dry material is ensured by an electric motor with an adjustable speed. The prepared pulp enters reactor 12, which is connected to high-voltage pulse generator 11. The treated pulp is removed from the reactor using drainage pump 13 and enters storage tank 14. Width D of the discharge cell in the plane of the electrodes with the number of pairs of oppositely polarized electrodes equal to 6 is 90 mm. The electrodes protrude 1 mm above the surface of the pipe. Thus, with an interelectrode gap h=23 mm, cell height H=25 mm, and cell cross-sectional area is 22.5 cm². The optimal ratio of solid material (S) to liquid (L) in the pulp by weight is determined to be S:L = 1:2. At the same time, on a single saturable magnetic circuit of the last compression link of the magnetic compressor, an even number of inductive energy storage devices with individual semiconductor choppers are manufactured, in such a way that one half of the output inductive storage devices generates a voltage pulse of positive polarity, and the other half of the output inductive storage devices generates a voltage pulse of negative polarity. Each electrode of the discharge cell is connected to its own inductive energy storage device. Electrodes of positive polarity are located in a line on one side of the cell, and electrodes of negative polarity are located in a line on the opposite side of the cell opposite each other, which allows synchronizing the generation of voltage pulses and forming a multi-channel completed electrical discharge in the pulp with a time spread between channels of no more than 0.5 ns, while the distance in the line between adjacent unipolar electrodes is equal to twice the distance at which the shock wave from the channel of the completed electrical discharge in the pulp attenuates and degenerates into a sound wave.

EFFECT: device provides increased productivity and efficiency of the process of selective disintegration of solid materials when treating pulp with completed electrical discharges.

1 cl, 5 dwg, 2 tbl, 2 ex