SU1685555A1 - Separator for concentrating of fine-grained friable materials - Google Patents

Abstract

The invention relates to the enrichment of fine-grained bulk materials and can be used in finishing operations for the enrichment of rare-metal, tin and tungsten-containing ores, as well as in the classification of homogeneous materials. The purpose of the invention is to increase the enrichment efficiency by reducing the fluidized-bed turbulence. The separator contains an inclined chute 1 with a perforated bottom 2 and side walls, an air supply device 4 located under the chute 1, a loading device 5 installed above the upper part of the chute 1, separation products receivers 6, a dust removal device 7 and the slope of the groove 1. The perforated bottom 2 of the groove 1 is a part of the ellipse, symmetrical to its minor axis and with a width of less than two major semi-axes. The side walls of the groove 1 are made curved with the direction of the bulges towards each other. The perforated bottom 2. Gutter 1 has a width that decreases from the loading end of the chute 1 to the discharge end. The source material through adapt6

Description

(Reg. 1

5 enters chute 1. Under the action of air, the material is fluidized and flows along the elliptical surface of chute 1. At the same time, part of the material moves along the radii of curvature of the side walls. In the process of moving the material along chute 1, mineral grains are stratified by density. Under the action of centrifugal forces

the light particles are rejected to the periphery along the radii of curvature, and the heavy particles move along curvilinear conjugations of the elliptical surface of the groove 1 with the side walls while simultaneously mixing into the lower layers of the flow in the narrowing part. 1 hp ff, 2 ill.

The invention relates to the field of enrichment of fine-grained bulk materials and can be used in finishing operations at enrichment of metal, tin and tungsten-containing ores, as well as in the classification of homogeneous materials.

The purpose of the invention is to increase the enrichment efficiency by reducing the fluidized-bed turbulence. FIG. 1 shows the proposed separator, a general view; in fig. 2 - gutter, cross section.

The separator includes an inclined chute 1 with a perforated bottom 2 and side walls 3, an air supply device 4 located under the chute 1, a loading device 5 mounted above the upper part of the chute 1, receivers 6 of separation products located at the discharge end of the chute 1, device 7 for removing dust; and a device 8 for changing the angle of inclination of the chute. The chute 1 is closed by a cover 9 and fixed to the frame 10 by means of a hinge 11 and a device 8 made in the form of two screw mechanisms. The perforated bottom 2 of the chute 1 is made as part of an ellipse, symmetrical to its minor axis and with a width of less than two major semi-axes. The side walls 3 of the groove 1 are curved with the direction of the bulges towards each other. The perforated bottom 2 of the chute 1 is provided with a width that decreases from the loading end of the chute 1 to the discharge end.

The separator works as follows.

The source material through the device 5 enters the chute 1. Under the action of air, the material fluidizes and flows along the elliptical surface of the chute 1; more dense minerals are concentrated in the lower layers of the stream,

are evenly spaced across the width of the elliptical surface of chute 1, and less dense in the upper layers, mainly concentrating along the longitudinal axially tapering portion of the chute. This is facilitated by the movement of a piece of material around the curved walls of the gutter. Under the action of centrifugal forces, light particles are thrown to the periphery along radii of curvature, and heavy particles move along curvilinear conjugations of the elliptical surface of trench 1 with side walls 3, simultaneously moving to the lower layers of the flow

tapering part.

The mineral fan formed at the discharge end of the narrowing groove is divided by the height of the stream into a series of products with different contents of heavy components. Separated products are collected using tool 6. The dust formed between the chute 2 and the lid 9 formed during operation is removed using tool 7.

Performing a perforated bottom of the gutter as a part of an ellipse, symmetrical to its minor axis and with a width of less than two major semi-axes, reduces the contact surface of the fluidized bed.

flow with side walls and leads to a decrease in flow turbulence in the second half. In addition, the combination with curved side walls contributes to the uniform distribution

heavy particles in width. This is due to the fact that as the flow moves along a part of the ellipse, the heavy particles tend to concentrate along the longitudinal axis of the chute. However, centrifugal forces

The parts of the flow that arise when moving along curvilinear side walls hold them, stretching the fan evenly across the width of the groove. The cumulative interaction of these factors reduces the spreading of the horizontal velocity along the height of the fluidized flow, reduces turbulence, which increases the efficiency of enrichment.

Claims (2)

1. A separator for enriching fine-grained bulk materials, including an inclined chute with a perforated bottom and side walls, an air supply device located under the chute, a loading device mounted above the top of the chute, receivers of separation products located at the discharge end of the chute, and changing the angle of inclination of the chute, characterized in that, in order to increase the enrichment efficiency by reducing the turbulence of the fluidized stream, the perforated e bottom of the trough is designed as a part of an ellipse symmetrical its minor axis, and a width of less than two of its large semi-axes, and the side wall of the chute are curved to the direction of protuberances towards each other. 2. A separator according to any one of the preceding claims, characterized in that the perforated bottom of the chute is made in width, decreasing from the loading end of the chute to the discharge one.  /////// 7 -1 2