SU1480895A1 - Method of loose materials separation - Google Patents

Abstract

The invention relates to the enrichment of minerals and can be used in the construction, mining and other industries where sorted bulk materials are required. The purpose of the invention is to increase the efficiency of separating sand from gravel by creating the effect of a multi-stage ejector. The original sand and gravel mixture is divided into vertical layers with the help of grates with a V-shaped cross section. The material is affected by horizontal air flow directed along the vertical layers. Each air stream forms a multi-stage ejector with the walls of two adjacent layers of material. The air in the material layers is sucked through the walls of the slots by a high-speed air jet. Together with the aspirated air, fines are removed from the material — dust, sand, and other light particles that are carried by the air stream beyond the separation boundary. 2 Il.

Description

one

The invention relates to the enrichment of minerals and can be used in the construction, mining and other industries where sorted bulk materials are required by fraction,

The purpose of the invention is to increase the efficiency of sand separation from the grapheme by creating the effect of a multi-stage ejector.

The method is carried out as follows.

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The original sandstone-gravel mixture is divided into vertical layers with the help of grates with a V-shaped cross section. The material is affected by horizontal air flow directed along the vertical layers of material. The separation fraction output t.

FIG. 1 shows a device for implementing the method, a general view; in fig. 2 - section aa in figure 1 about

The device includes a dropping drum 1 of a conveyor belt, a frame 2, a separating chamber 3 with two collecting funnels 4 and 5, respectively, for enriched sand and gravel, a gate 6 providing a threshold for their separation, grate 7 having a V-shaped section and cantilever attached to the frame axial flow fan 8 for creating airflow 9c Source material 10 is a continuous flow of a mixture of sand and gravel Separate flat 1

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material layers 1I are obtained after separation at the grate. Narrow slots 12 under the grate are used to pass airflow jets

The method is carried out as follows.

The initial sand-gravel mix (material 10) is fed by the dumping drum 1 into the separation chamber 3 and further onto the grate 7 of the V-shaped cross section. Here the material is divided into thin parallel layers 11, each of which is located (oriented) in the direction of air flow . In the slot 12 between the layers 11, the air flow 9 passes from the fan 8 °. The air flow here is divided into separate jets. Each jet, together with the walls of two adjacent material layers 11, forms a multi-stage (multi-stage) ejector. In the walls of the layers there are air labyrinths between large particles. The air in the material layers 11 is sucked through the walls of the slots 12 by a high-speed jet of air flow 9 coming from the fan 8.

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Together with the inhaled air, fines are removed from the material — dust, sand, and other light particles that are carried by the air stream beyond the separation boundary and enter 35

to the funnel 4, from where they can be transported as a finished product by means of a conveyor (for example, limestone flour in the case of separation of waste from flux crushing and processing plants) Heavier particles (crushed stone, gravel) that experience less air resistance, deviate less under the influence of air flow from the path of free fall. This is due to the fact that each material layer 11 is turned to the air by its narrow side and opposes it with the whole

The formation of several thin layers of material located along the direction of air flow is technically easier than one layer located across the air flow. Mechanical separation of material into several parallel layers along the air flow does not distort the natural segregation of the material under the influence of gravity and air pressure. layers blowing fines under the action of the pressure drop created by a multi-stage ejector (formed by pores in the flow of material and stream air between the layers of the material) is much simpler and easier than with the direct pressure of the air flow. At the same time, the energy of the air flow is spent not on the impersonal deviation of both small and large particles of material, but only on selective extraction of fines. Consequently, the amount of energy is reduced by separating the same amount of raw material.

Claims (1)

Invention Formula A method for separating bulk materials, including separating the starting material into vertical layers using trellis dividers, exposing the material to horizontal air flow directed along the vertical layers of material, and withdrawing the separated fractions, so as to improve the separation efficiency. its width. The impact of the sand under the sand from the gravel by creating the effect of a multi-stage ejector, the material is divided into vertical layers using grates with a V-shaped cross section. Small particles are thrown, and this effect is carried out across the layer, and along it, and not due to the pressure of the air flow, but due to the pressure difference inside and outside the layer. The particle separation limit for particle size is set and adjusted by the corresponding position of the gate 6. Controlling the direction of air flow in order to effectively separate different kinds of materials is not provided. The formation of several thin layers of material located along the direction of air flow is technically easier than a single layer located across the air flow. Mechanical separation of material into several parallel layers along the air flow does not distort the natural segregation of the material under the influence of gravity and air pressure. layers blowing fines under the action of the pressure drop created by a multi-stage ejector (formed by pores in the flow of material and stream air between the layers of the material) is much simpler and easier than under the action of the direct pressure of the air flow. At the same time, the energy of the air flow is spent not on the impersonal deviation of both small and large particles of material, but only on the selective extraction of fines. Consequently, the amount of energy is reduced by separating the same amount of raw material. Invention Formula A method for separating bulk materials, including separating the starting material into vertical layers using trellis dividers, exposing the material to horizontal air flow directed along the vertical layers of material, and withdrawing the separated fractions, so as to improve the separation efficiency.  sand from the gravel due to the effect of a multi-stage ejector; material is divided into vertical layers using grates with a V-shaped cross section. . ". T 5 -z: -r.fe. ten eight P FI.1