RU2703033C1 - Concentration chute - Google Patents

Abstract

FIELD: technological processes.SUBSTANCE: invention relates to the enrichment of minerals and can be used to separate solid particles in density in a liquid medium, especially when extracting comparatively light solid particles, for example amber. Concentration chute includes loading part connected with inclined chute, free end of which represents its unloading part and receivers of valuable concentrate and rock. Bottom of the inclined tray is equipped with transverse catching curvilinear pockets arranged with concavity downstream, rock is discharged from the ends of transverse trapezoidal curved pockets located downstream. In the tray there are inclined mesh curvilinear plates concavity in flow with mesh catching pockets in the lower part, the target product output is performed from the ends of transverse curved pockets of mesh plates located downstream.EFFECT: increased extraction of a valuable component.1 cl, 2 dwg

Description

The invention relates to mineral processing and can be used to separate solid particles by density in a liquid medium, mainly when extracting relatively light solid particles, for example, amber.

Known enrichment trough, tapering towards the discharge of material, including a bottom with transverse adjustable slots in the discharge zone, side walls, a movable cutter located in front of the discharge end of the trough, receiving trays for valuable component and rock concentrate, loading tray. The side walls of the enrichment trough are made with a two-part connector. Moreover, the side walls on the discharge side are pivotally mounted on the bottom with the possibility of deflection to the outside, and the trough is equipped with a device for returning the moving parts of the side walls to their original position. In addition, the width of the bottom of the gutter in the place of the connector is 3-4 times greater than the width of the bottom of the gutter at the place of unloading. To protect the articulation of the movable parts of the side walls with the bottom of the gutter from clogging with the pulp, the gutter is provided with an elastic coating mounted on the bottom of the gutter between the side wall connector and the discharge end. [one]

The disadvantages of this technical solution are:

it is not possible to partially separate and withdraw from the dressing trough during the enrichment of the target product size, which is one of the main indicators of the quality of the target product;

impact on the target product size, which is one of the main indicators of the quality of the target product, throughout the enrichment process;

the incomplete process of separating the pulp into a stream containing rock and a stream containing a valuable component, which is carried out in the discharge zone of the pulp using a movable cutter, into a stream containing rock and a stream containing a valuable component;

the limited range of regulation of the width of the gap, causing the discharge of pieces of rock that do not pass through the gap in the discharge zone.

A dressing chute is known, comprising an inclined bottom with side walls communicated with an upper end with a loading tray, receiving trays of a valuable component (e.g., amber) and heavier rock and a movable cut-off separating the flow into the valuable component and the rock flow. The bottom of the dressing trough is made stepwise and expanding downward. In this case, the receiving tray of heavy fractions is made with an adjustable discharge opening. The outlet can be adjusted by changing the nozzle, using a valve, shutter, etc. The dressing trench is provided with a lid connected flexibly to the loading chute and to the side walls [2]

The disadvantages of this technical solution are:

it is not possible to partially separate and withdraw from the dressing trough during the enrichment of the target product size, which is one of the main indicators of the quality of the target product;

impact on the target product size, which is one of the main indicators of the quality of the target product, throughout the enrichment process;

the incomplete process of dividing the pulp into a stream containing rock and a stream containing a valuable component, which is carried out in the discharge zone of the pulp using a movable cutter, into a stream containing rock and a stream containing a valuable component.

An enrichment chute is known, including an inclined bottom with side walls, a lattice threshold deflecting the rock installed at the bottom at an acute angle to the side wall, an unloading window with a shutter made in the side wall at the bottom at the top of the acute angle, which is formed by the lattice threshold and the side wall. A deflecting plate is installed above the discharge window, and the trough itself is made tapering. The flap of the discharge window is pivotally fixed on the outside of the side wall and is equipped with a return mechanism. In this case, the concentration chute is equipped with a movable cut-off separating the stream exiting from the concentration chute into a stream with a valuable component and a stream with rock [3].

The disadvantages of this technical solution are

it is not possible to partially separate and withdraw from the dressing trough during the course of the target product size, which is one of the main indicators of the quality of the target product;

impact on the target product size, which is one of the main indicators of the quality of the target product, throughout the enrichment process;

the incomplete process of dividing the pulp into a stream containing rock and a stream containing a valuable component, which is carried out in the discharge zone of the pulp using a movable cutter, into a stream containing rock and a stream containing a valuable component;

rock discharge through a discharge window in the side wall, into which it is possible to capture the valuable component located below the damper, leading to the loss of the valuable component. The placement of a lattice deflecting rock at the bottom of the enrichment trough leads to a deterioration in the process of moving high-density solid particles to the lower layers and the lungs to the upper due to their impact on the lattice threshold, respectively, the probability of capture of a valuable component by the discharge window increases, which ultimately reduces the yield of valuable product.

The closest technical solution to the invention is the hydromechanization technology introduced in 1958 at the Primorsky quarry in the Kaliningrad region. Overburden is developed by hydraulic monitors and draglines through a transport-free system. Amber-bearing rock is developed by a dragline and stored in a cone. Then the cone is washed away by a powerful jet of water and, through a pulp-and-water trench, flows by gravity to a pump station for transfer to a factory. Large pieces of amber are caught manually by the net. And smaller fractions (not caught by catchers) are pumped through the pipeline to the primary amber enrichment unit [4].

The disadvantages of this technical solution are:

not the ability to manually catch amber, not only the largest formations of the target product, but also those sizes, which are one of the main indicators of the quality of the target product;

the use of manual labor of amber hunters, standing shift in the pulp-and-water trench;

not the possibility of partial separation of the target product size, which is one of the main indicators of the quality of the target product;

shock effects by the working bodies of the pump on the target product in the process of supplying to the primary enrichment unit;

impact on the target product size, which is one of the main indicators of the quality of the target product, throughout the enrichment process.

The objective of the invention is the preservation of the quality of the target product, by partial separation and collection of the largest formations of the target product in the enrichment process, preventing impact on them of the enrichment process of the target product, in particular amber, and the exclusion of manual labor of amber hunters, expanding the range of dressing channels.

The problem is solved in that the enrichment chute has a loading part, an inclined tray with side walls and a bottom, and receivers for the target product and for the rock. At the same time, the bottom of the dressing trench is provided for the breed with transverse hunting curvilinear pockets with a concavity in the flow, the rock is discharged at the ends of the transverse hunting curvilinear pockets located downstream. In the tray, mesh curvilinear plates with a concave flow with mesh fishing pockets in the lower part are installed; the target product is dispensed from the ends of the transverse hunting curved pocket pockets of mesh plates located downstream.

The claimed combination includes all the essential features characterizing the invention and providing a technical result in all cases to which the requested amount of legal protection applies.

In FIG. 1 schematically shows a top view of the enrichment trough, in FIG. 2 schematic section AA of the enrichment trough

The beneficiation chute includes a loading part 1, and an inclined tray with side walls 2 and a bottom 3, the free end of which is the unloading part 4 of the beneficiation chute for delivering the finest fraction of valuable concentrate to the receiver 5. The bottom 3 of the inclined chute is equipped with transverse hunting curved pockets 6 sec concavity in the flow and the maximum slope of their bottom, which is achieved by the fact that one end of the transverse dexterous curved pocket 6 is located upstream of the other, lower. From the ends located downstream, the discharge is carried out in the receiver 7 for the breed.

Mesh curved plates 8 are installed in the tray with a concave flow and an inclination forward with mesh fishing pockets 9 in the lower part, the target product is dispensed from the ends of the transverse fishing curved pockets of the mesh plates located downstream. Or the target product can be collected in the drive 10. The mesh size of the mesh plates determines the size of the passed fraction of the target product.

Concentration trough works as follows.

The separated material in the form of pulp enters the loading part 1, from where the pulp flows by gravity into the inclined tray and flows down between the side walls 2. Under the action of gravity in an aqueous medium, high-density solids move to the lower layers, light particles to the upper layers. The heavy particles and aggregates drawn along the bottom 3 are captured by the curved pockets 6. The inertial movement of heavy particles and aggregates in the pulp stream leads to their collision with the wall of the curved pockets 6, leading to their bounce down in the curved pocket 6, facilitating their transport way down. The spreading of the pulp itself along the wall of the curved curved pocket 6 leads to an increase in flow turbulence in the curved curved pocket 6, also facilitating the transport of heavy particles and aggregates down to the dump in the receiver 7 for the rock. The number of hunting curved pockets 6 in the dressing trench is determined by the amount of rock contained in the shared pulp and the required probability of purity of separation of the rock from a valuable product.

Light particles of the target product are transferred to the upper layers of the pulp stream, especially the largest particles. If the particle size of the target product is larger than the cells of the mesh plate 8, they, under the influence of the energy of the flow and its hydrodynamics, as well as the inclination of the mesh plate 8 on the flow, will move down into the mesh hunting pocket 9. Then, under the influence of the kinetic energy of the particle flow of the target product and the inclination the mesh trap pocket is transported along it to the end face either for delivery or to the storage tank 10. If the particles of the target product are smaller than the mesh plate cells, they flow through a curved mesh plate at 8 on. Thus, a partial separation of the target product is carried out. The required number of curved mesh plates 8 as a whole determines the number of selected fractions.

When the unloading part 4 of the end of the inclined tray is reached, the smallest fraction of valuable concentrate is delivered to the receiver 5

Information sources

1. Auth. St. No. 1560325 USSR, IPC ⁵ V03V 5/26, 5/40, publ. 1990.

2. Auth. St. No. 1777961 USSR, IPC ⁵ V03V 5/26, 5/40, publ. 1992.

3. Auth. St. No. 1808382 USSR, IPC ⁵ V03V 5/70, publ. 1993.

4. Amber Full HD TOMS 2017. Kaliningrad Amber Plant. Published: January 18, 2018 URL https://youtu.be/kISFaxiQ_8s (accessed June 20, 2018)

Claims (1)

Concentrating trough, including the loading part associated with the inclined chute, the free end of which represents its unloading part and receivers of valuable concentrate and rock, characterized in that the bottom of the inclined chute is equipped with transverse trap curved pockets placed concave downstream, the rock is discharged from the ends of the transverse curved curved pockets placed downstream, and in the tray there are inclined mesh curved plates with a concave curved flow with mesh trapped pockets contact at the bottom of the title product collection takes place of the ends curvilinear transverse trapping pockets of mesh plates placed downstream.

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