SU1719075A1 - Apparatus for electrohydraulically crushing and milling solid materials - Google Patents

Abstract

The invention relates to the crushing and grinding of materials and relates to devices for electro-hydraulic crushing and grinding of hard materials and improves the efficiency of crushing and grinding. products, positive high-voltage elect; genus 3, which focuses the reflector 4 and is made hollow in the form of a truncated straight cone. The focusing reflector 4 has stiffening ribs 5 and is mounted on vibration damping springs 6 by means of a supporting frame 7.2 Cp. F-ly. 1 il.

Description

SP

with

The invention relates to the crushing and grinding, for example, waste in the production of concrete and reinforced concrete products, rocks, ores and other materials.

The purpose of the invention is to increase the efficiency of crushing and grinding.

The drawing shows a fragment of the proposed device.

The device for electrohydraulic crushing and grinding contains a working tank 1 filled with water, with loading and unloading units, the material to be processed 2, for example, concrete waste; and reinforced concrete products, a positive high-voltage electrode 3, focusing the reflector 4, made hollow in the form of a truncated straight cone. The focusing reflector 4 has stiffening ribs 5, is made with a central hole and is mounted on vibration damping springs 6 with the help of a supporting frame 7..

The dimensions and angle of taper of the reflector are determined by the dimensions of the discharge region, the treatment zone and the immersion depth of the high voltage electrode. In this case, the size of the discharge region can be neglected; it is small compared with the depth H of the immersion of the high voltage electrode. The optimal size of the treatment area

are Di Y D2; , 600; tg on D2 / 2H,

where Do is the diameter of the working volume of the crusher tank;

DI is the diameter of the hole in the center of the focusing reflector;

D2 and Oz diameters of the upper and lower bases of the truncated cone;

and - the angle of taper.

oh oh

vj sp

The device works as follows. In the process of loading into the working volume of the tank 1, the material to be crushed and comminuted 2, for example, waste products of concrete and reinforced concrete products, is fed to high-voltage electrode 3 by high-voltage pulses. As a result, between the tip of the high-voltage electrode 3 and the material to be processed 2, located on a grounded low-voltage electrode, made in the form of a screening organ i (not shown), 1, electric pulse discharges occur that excite shock ultrasonic waves. A part of the energy of these waves (about 25%) is used for crushing and grinding the processed material 2, and the rest without the upper reflector 4 is emitted into the surrounding space both after a direct passage through the water surface and after resizing on the walls of the working volume.

The use of a focusing reflector 4 provides for the reflection of about half of the scattering energy of shock waves, which is directed to the material 2 to be processed, making it more intense crushing and grinding.

ANGLE of the taper of the reflector 4, chosen according to the size of the device, ensures that the reflected waves fall on the material being processed 2, without subjecting the high-voltage electrode 3 to shock.

During operation of the device, bubbles of gas released during high-voltage spark discharges in a liquid will float up and freely escape into the atmosphere through the gap between the walls of high-voltage electrode 3 and the edge of the central hole of the reflector 4.

the reflector 4 will be extinguished on the damping springs b, without subjecting the high voltage electrode 3 to mechanical loads.

When the crusher operates with a focusing reflector, the water level in the crusher tank must ensure that the reflector 4 is immersed.

The use of crushers with a hollow reflector, which reduces the energy loss by about half, will allow to obtain a large annual effect from a single crusher during single-shift operation and, at the same time, to almost double the productivity of waste processing.

Claims (3)

1. A device for electro-hydraulic crushing and grinding of hard materials containing a working container with loading and unloading units installed in the upper part of the last positive high-voltage electrode and a focusing reflector placed around it and located below the last in the lower part of the working capacity negative low-voltage electrode, characterized in that, in order to increase the efficiency of crushing and grinding, the focusing reflector is made hollow with a reflective surface in the form of a truncated straight cone connected to the walls of the working container by means of vibration damping springs. 2. The device according to claim 1, characterized in that it is provided with internal reflecting surface of the focusing reflector stiffening ribs. 3. The device according to paragraphs. 1 and 2, o t, l and h aa e with the fact that the focusing reflector made with a central hole through which a positive high-voltage electrode is passed with a gap.