RU1555945C - Hydraulic classifier - Google Patents

Abstract

The invention relates to the enrichment of minerals in the aquatic environment and is intended for the classification of ores in the mining industry. The purpose of the invention is to improve separation efficiency and operational reliability. In the lower part of the central housing (CC) 1, there are pipes (P) for supplying clean water 9 and for withdrawing heavy fraction 8. In the upper part of CC I there is a drain

Description

The invention relates to the field of mineral processing in the aquatic environment and can be used to classify ores in the mining industry

The purpose of the invention is to improve separation efficiency and operational reliability.

On Fig, 1 shows a hydraulic classifier, a General view; figure 2 is a section aa in figure 1; Fig. 3 shows a motion diagram of a shared two-phase flow in a hydraulic classifier,

The hydraulic classifier includes a cylindrical-conical housing 1 with a cylindrical separation chamber 2, in the lower part of which there is a segmented flow divergent 3 with diverging walls, with a conical divider 4 mounted in the center of the bottom of the reflector 3. Coaxial to the housing -1 is installed a pulley guide 5 so that its lower end is located at the center of gravity (distance n) of the reflector 3 in order to prevent it from clogging and to form the necessary turbulent vortex. Above the reflector 3, a flow damper 6 is placed, made in the form of a system of plates symmetrically located and radially diverging from the slurry conduit 5. The hydraulic classifier is equipped with a collector 7 of coarse-grained product with nozzles 8 for discharging this product and 9 for supplying clean water, located

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in the lower part of the housing, as well as a drain pipe 10 located in the upper part of the housing I. The upper edges of the reflector 3 and the inner wall of the housing 1 form an annular gap for unloading the coarse product. The size of the annular gap (size) depends on the particle size in the feed pulp

Hydraulic classifier works as follows.

The pulp, containing up to 20% solid by mass with a fineness of minus 2 (3) mm, is fed under pressure into the cylindrical separation chamber 2 through. slurry conduit 5, from which it flows to a segmented (bowl-shaped) reflector 3 of the stream. Due to the coaxial location of the slurry conduit 5 in the cylindrical separation chamber 2, the segmented shape of the reflector 3 and the cone-shaped divider 4, the pulp stream is evenly distributed over the surface of the reflector 3, the flow is turbulized with the formation of swirling turns (see, Fig. 3). The large fractions deposited from the flow onto the surface of the reflector 3 are shifted due to the kinetic energy of the pulp coming from the slurry duct 5 to the annular discharge gap between the reflector 3 and the inner wall of the housing I. Through this gap, the coarse-grained product enters the collector 7 of the large fraction, and through the pipe 8 is removed from the hydraulic classifier. To avoid

entrapment of fine particles with coarse product discharged through the slit into the collector 7, additional water is supplied through the nozzle 9 because a layer of heavy and solid particles forms on the surface of the reflector, which, under the action of kinetic energy, move along the surface of the reflector to the discharge gap, and additional water It is necessary only for more complete washing out of the layer of medium and light particles. Lighter, not falling out

The segmented shape of the flow reflector provides the most efficient conversion of the rectilinear from the flow to the vortex. The closer the value of the angle of rotation of the flow in the reflector to 180 °, the higher (with other constant parameters) the CCC of the formation of the correct vertical 10 ring upstream flow. A reflector of this form has undergone lengthy tests to obtain good technological and operational results. Cup-shaped

the particles are carried away by the upward flow, 15 this indicator is somewhat worse, so

559456

The segmented shape of the flow reflector provides the most efficient conversion of the rectilinear from the flow to the vortex. The closer the value of the angle of rotation of the flow in the reflector to 180 °, the higher (with other constant parameters) the CCC of the formation of the correct vertical 10 ring upstream flow. A reflector of this form has undergone lengthy tests to obtain good technological and operational results. Cup-shaped

to the middle part of the separation chamber 2, where it passes through the flow damper 6, the laminarization of the flow in the flow damper allows the remaining large particles to be removed from the finely divided product directed to the drain pipe 10, which are lowered into the middle zone of the separation chamber d into lower

as the radius of curvature of the surface of the reflector is not a constant,

Claims (1)

20 Claims Hydraulic classifier: comprising a cylinder-conical housing with nozzles for supplying clean water and withdrawing a heavy fraction, 1 located The location of the lower end of the pulygo-25 in its lower part, and with a drain nozzle 5 at the center of gravity by a cut located in it the upper flow header is the most opti- cal, pulp conduit installed coaxially. internally inside the housing, the reflector With an increase in the distance h of the end flow, located under the slurry pulp 5 from the bottom of the reflector 3 pro -30 D ° m and forming an annular gap with the inner wall of the process of formation of vortices on the inner casing to pass through the surface of the reflector, only blurred vortices above the reflector are formed 3, and the efficiency of the separation process in the inventive classifier drops sharply when the slurry conduit 5 is of large fraction and the flow damper is located in the cylindrical part of the housing above the flow reflector, 35 characterized in that, in order to increase the reliability of operation and separation efficiency, the reflector flows are made in a segmented shape, and the lower end of the slurry conduit is closer to the bottom of the reflector 3 by a distance less than h, clogging of the slurry conduit 5 is observed, which reduces the reliability of the classifier as the radius of curvature of the surface of the reflector is not a constant, 30 D ° m and forming an annular gap for passage with the inner wall of the housing coarse fraction, and flow damper, located in the cylindrical part of the housing above the flow reflector, 35 characterized in that, in order to increase the reliability of operation and separation efficiency, the reflector flows are made in a segmented form, and the lower end of the slurry conduit 40 is located at the center of gravity of the reflector flow. Figure 2 Fig.Z