RU2520749C1 - Inclined strake - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: inclined strake comprises loading and unloading assemblies. Bottom body consists of two surfaces inclined to each other to make a flute narrowing from material loading side to unloading side. It is equipped with rectangular cross-section crimps. Said crimps are laid in symmetry at angles on two surfaces. This strake is equipped with cut-off device arranged some 4-8 mm above said crimps composed by plates. The latter are equally spaced apart and located at 40-50 degrees to strake axis and inclined at 60-80 degrees towards unloading assembly so that the plate inner boundary line converges from loading assembly to unloading assembly while plate end thrusts against the board lateral edge. Plate top edge is located above lateral board.

EFFECT: efficient separation of material, higher yield of heavy fractions.

4 dwg

Description

The invention relates to the enrichment of minerals, in particular to devices for the enrichment of sands of placer deposits, and can be used both in exploratory testing of low-volume geological samples and in the mining industry as sub-gates to washing devices for the enrichment of "tailings" containing small and thin fractions of heavy minerals, or as an independent washing device for the enrichment of placers with a predominance of fine and thin metal.

A lapping gateway is known in which the bottom body is made of two planes in the form of a gutter, with an angle gradually decreasing from the loading unit to the unloading. The gutter is equipped with a system of partitions located at an angle to the longitudinal axis. Partitions form longitudinal compartments with plates. The plates are mounted parallel to the axis. Each partition has an opening above the bottom of the gutter. The cross-section of the aperture, with the possibility of regulation using a gate, decreases as the mineral mixture moves to the unloading unit (from one partition to another).

The disadvantage of this gateway is its low productivity, and also with an increase in the volume of incoming material, the movement of flows in the gateway changes significantly, which leads to a decrease in the extraction of a valuable component.

A known gateway for placer dressing, which is a gateway that includes an inclined bottom made of two sidewalls placed at an angle to each other with flutes mounted at an angle to the longitudinal sides of the sidewalls, and a gutter located between the sidewalls, with a loading device and a concentrate cutter, a mechanism for orbital movement of the bottom of the gateway.

The disadvantage of the gateway for the enrichment of placers is the complexity of the design and operation.

The elimination of the disadvantage of this gateway in order to increase the extraction of valuable components and ensure the continuity of the work process can be achieved in the proposed design of the inclined gateway having loading and unloading nodes, the bottom body is made of two planes at an angle to each other in the form of a chute, with a narrowing on the material supply side for unloading, it is equipped with rectangular grooves, the grooves are laid symmetrically to each other on two planes at an angle, characterized in that the cutter is installed over the grooves at a distance 4-8 mm, made of plates located at an equal distance from each other at an angle of 40-50 ° to the axis of the lock and inclined at an angle of 60-80 ° towards the unloading unit, so that the line of the inner border of the plates narrows from the loading node to the unloading, and the end of the plates abuts against the side edge of the bead, while the upper edge of the plates is above the side bead.

Comparative analysis with the design of flushing locks, adopted as an analogue and prototype, shows that in the proposed embodiment, due to the design of the lock, the nature of the movement of material flows and fractional separation changes. When minerals move in the space between the cutoffs, all the mechanisms of gravitational separation work: in the volume of the flow and on the surface of the cutting surface. The heavy fraction settles on the flutes to the bottom of the tray and moves to the concentrate accumulator, light particles are carried away by the stream and overflow on the sides of the lock into the tails.

Thanks to this design, the gateway is uninterrupted during continuous unloading of concentrate and tailings. At the same time, there are no moving mechanisms in the design, and there is a constant removal of light particles through the side walls. Therefore, the present invention meets the criterion of "novelty."

To verify compliance of the invention with the criterion of "inventive step", a comparison was made with other technical solutions known both from special technical literature, catalogs and scientific publications, and from sources included in the "prior art".

The inclined gateway meets the requirement of an inventive step, since the combination of its essential features provides the gateway with a new quality, expressed in increasing the efficiency of the enrichment process (increasing extraction and productivity) with a significant reduction in size, which does not follow explicitly from the prior art.

Figure 1 shows the gateway, a General view; figure 2 is the same, a top view; figure 3 is a section aa; figure 4 is a section bB.

The inclined gateway consists of loading 1 and unloading 2 nodes, the bottom body 3 is made of two planes at an angle to each other in the form of a gutter, with a narrowing on the supply side of the material for unloading, equipped with rectangular grooves, the grooves are laid symmetrically to each other on two planes at an angle characterized in that the cutter 4 is mounted above the flutes at a distance of 4-8 mm, made of plates located at an equal distance from each other at an angle of 40-50 ° to the axis of the airlock and inclined at an angle of 60-80 ° to the side of the unloading unit, in this way m, so that the line of the inner border of the plates tapers from the loading unit to the unloading unit, and the end of the plates abuts against the side edge of the bead 5, while the upper edge of the plates is higher than the side bead.

The slanted gateway works as follows:

The initial pulp containing sands with valuable heavy minerals comes from the pulp line to the loading unit, where the pulp is distributed over the entire width of the lock, the material is continuously fed with water to the upper part of the lock channel. The location of the cut-off plates provides for the sequential diversion of part of the pulp as the original pulp moves along the axis of the lock to the discharge unit. Part of the truncated pulp, falling into the space between the cut-off plates, is subjected to density separation; on the surface, the light fraction is carried away by the flow of plate water by fan-like delamination and finally separation into two streams: light and heavy fractions. The light fraction (tails) under the influence of the flow of water overflow is removed through the side walls. The heavy fraction settles due to the cut-off plates to the bottom of the tray and subsequently is cleaned on the flutes under the influence of downward flows in the direction of movement of the material along the bottom of the lock. In this case, due to turbulent flows, part of the light materials are weighed by the flow and are picked up by pulp flows, and move in the direction of tailings unloading. Thus, there is a constant refining and delamination of the starting materials, which, in the end, leads to an increase in the separation efficiency of the material. The concentrate moves to the discharge unit, and the tailings are removed through the side walls.

Bibliography

1. Patent of the Russian Federation No. 2236302 IPC ⁷ V03V 5/70 Lapping gateway / A.I. Matveev, E.S. Sleptsova, A.N. Grigoriev, AMMonastyrev; applicant and patentee Institute of Mining of the North named after N.V. Cherskogo SB RAS No. 2002111897, Application. 05/06/2002; Publ. 09/20/2004. - Bull. No. 26 (4.3). - 2004 - p. 414.

2. Patent of the Russian Federation No. 2106912 IPC ⁶ V03V 5/70 Gateway for the enrichment of placers / Pugachev V.S., Shevchenko I.A., Vetrov V.V., Rozhkov V.A., Garnik Yu.G .; Applicant Rozhkov V.A., Patentee Pugachev BC 07/04/1997; Publ. 03/20/1998. - Bull. No. 15 - 2003.

Claims (1)

The inclined gateway consists of a loading and unloading unit, a bottom body made of two planes at an angle to each other in the form of a gutter, with a narrowing on the supply side of the material for unloading, equipped with rectangular grooves, the grooves are laid symmetrically to each other on two planes at an angle that differs in that the cutter is mounted above the corrugations at a distance of 4-8 mm, made of plates located at an equal distance from each other at an angle of 40-50 ° to the axis of the lock and tilted at an angle of 60-80 ° in the direction of the unloading unit, thus ohm to line narrowed inner edge plates from the feed unit to the discharge, and the end plate abuts against the side edge of the bead, the upper edge of the plates situated above the side rail.

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