SU1440543A1 - Device for classifying - Google Patents

Abstract

The invention relates to equipment for hydraulic classification. The goal is to increase the efficiency of classification. In the trough 1 of the device, the helix (C) 3 is made of pipe 6. The surface of pipe 6, facing the longitudinal walls of trough 1, is made of elastic sieves. The loading end of the pipe 6 has a loading sock 8. On the inner surface of the longitudinal walls of the trough 1 there are mounted sprinkles 9. The classified material is fed into the trough 1. The enlarged particles of the material fall to the bottom. There, they are gripped by a loading sock 8 and moved along pipe 6 to unloading. With stirring while moving the pipe 6, fine particles are separated. The latter return to the trough 1 through the holes in the elastic screens 7. The water from the sprinkled 9 under pressure washes away small particles from C 3 and the walls of the trough 1. Large particles in the form of sand are discharged from the discharge end of C 3. The small particles are discharged through the drain window. 1 hp f-ly, I ill.

Description

ABOUT

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The invention relates to equipment for hydraulic classification and can be used in the beneficiation of minerals in the metallurgical, chemical, construction and other industrial sectors.

The purpose of the invention is to increase the efficiency of the classification process.

The drawing shows the classifying device, obday view, a section along the axis of the spiral.

The classification device contains a trough with an end threshold of 2, a nHTsjonoiM nozzle (not shown) and a drain window (not shown), the helix 3 is fixed on the shaft 5 with the actuator (not shown) by means of a blue 4. Spiral 3 is made of pipe 6, whose surface facing the longitudinal walls of the trough is made of elastic sieves 7, and its front loading end has a loading sock 8. On the inner surface of the longitudinal walls of the trough 1 there is a spray 9.

The classifier works in the following way.

The classified material in the form of a pulp is fed through a feeding patrol (not shown) into the trough I at the level of the pulp in it. Large, heavy particles of material sink to the bottom of the trough in the sedimentation zone where the feed

the toe 8 of the rotating helix 3 and the pipe 6 are moved to the discharge zone. During the movement along the tube 6, the particles due to gravity are mixed and, when in contact with the pulp, the smallest fine particles (classified large classes) with the latter are returned to the trough through the openings in the elastic sieves 7. The elastic sieves 7 vibrate when handling material particles, which contributes to the intensification of the material separation process, as well as their self-cleaning. The jets of water supplied through the squirters under pressure wash the small particles off the spiral and the walls of the trough, which contribute to the self-cleaning of the sieves.

Upon further movement, the particles are dewatered and in the form of sand are transferred for further processing (usually for regrinding), if the classifier works in a closed loop with a mill .:

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The smallest particles of the material (classification size 1e) together with water are poured through the drain window (not shown) of the trough 1 and sent for further processing (enrichment).

The helix 3 can be made multi-threaded, and the boot sock 8, as the most susceptible to wear part, is removable. At the same time, the distance between the loading sock 8 and the bottom of the trough J can be adjusted depending on the size of the material being classified, as well as as the edge of the loading sock 8 is worn.

Coiling the helix out of the pipe, the surface of which is facing outwards, is made up of elastic sieves and the equipment of its front end with a loading sock eliminates the spontaneous return of sand from the unloading zone and the associated decrease in the useful volume of the deposition zone. This is provided by a closed spiral space (pipe). At the same time, the material sifted through the openings of the elastic sieve belongs to the class of size to be classified and flows (washed off) with water along the bottom of the trough into the zone. The volume of the deposition zone has a direct effect on the classification efficiency - with its increase it rises.

The presence of a loading sock at the front end of the helix ensures the capture (loading) of pulp and sand from the sedimentation zone.

In addition, the design eliminates the presence of a dead zone between the helix and the bottom of the trough. Resistance to movement of sand is significantly reduced, since there is no friction of sand on the cushion of the dead zone and the sand in the pipe moves due to the forces of gravity. Consequently, the wear and tear on the components is reduced and less installed drive power is required.

Claims (2)

Invention Formula . The classification device includes a trough with longitudinal walls, a helix located in the crust, a drive, a power supply nozzle, an end threshold and a drain window, which is more often than not. in order to 314405 ДЗ increase the efficiency of the process; the empty end of the pipe is made with a loading classification; torus is made of pipe, while 2. The device pop. 1, the pipe's spacing, facing to the g that in the inner walls of the trough, are made on it of the surface of the longitudinal walls assembled from elastic media, and the spatter is installed.