RU2774550C1 - Screen gateway device for precious metal enrichment - Google Patents

Abstract

FIELD: gold mining industry.

SUBSTANCE: present invention relates to the gold mining industry, in particular to equipment for the enrichment of minerals by the gravitational method. The stencil of the sluice of the device for enrichment of precious metals contains side walls with corrugations installed transversely and flow direction strips placed on them. The side walls of the stencil are made with an inclination from the longitudinal axis of symmetry of the stencil at an angle relative to the horizontal plane from 90° to 110°, mostly 100°. Rifles are made of a longitudinally curved metal profile containing three steps. The first stage is made at an angle of 60° to 80°, mainly 70° relative to the horizontal plane of the stencil in the direction of the movement of the pulp. The second stage is made parallel to the horizontal plane of the stencil in the direction of the movement of the pulp. The third step is made parallel to the first step upwards at an angle of 60° to 80°, mostly 70° relative to the horizontal plane of the stencil. On the corrugations mounted in a checkerboard pattern in several rows along the length of the stencil, the flow direction strips connecting the said corrugations in pairs. Odd rows of flow direction bars are mounted on corrugations at a negative angle of inclination to the corrugations at the stop point from -25° to -45°, mainly -35°, and even rows of flow direction bars are mounted on the corrugations at a positive angle of inclination to the corrugations at the stop point from 25° to 45°, mostly 35°. The last row of the mentioned planks connects the last corrugation and the plate limiting the stencil. Even rows of flow direction slats between them connect the extreme corrugations of the corrugation rows.

EFFECT: increase in the recovery factor of precious metals.

3 cl, 5 dwg

Description

The invention relates to the gold mining industry, in particular to equipment for the enrichment of minerals by the gravitational method [B03B 5/70].

Known from the prior art is a DEVICE FOR MINERAL BENEFITS [RU 2170619 (C1), publ.: 20.07.2001], including a lock, stencils with corrugations, sectionally installed with the possibility of removal in the bottom of the lock, made with parallel sides, and the stencils of the stencils are inclined to the bottom in the direction of the pulp flow, characterized in that the riffles in the stencil are installed with the formation of three fan-shaped zones, of which the middle zone is made in the form of a full fan with an opening angle of 80-90°, and the extreme ones are in the form of oncoming half-fans, while the riffles are placed between the sides are fan-shaped, their ends are fixed in the sides and have an angle of inclination to the bottom from the side of the wide part of the fan 70-75 ° and from the side of the narrow part 60-65 °, and the ratio of the distances between the ends of the flute from the side of the wide and narrow parts of the fan is 1.33 -1.62.

The disadvantage of this analogue is the use of three-zone fan-shaped areas of the stencil in the locks, which excludes its versatility.

From the prior art it is known SCREEN [RU 2121880 (C1), publ.: 11/20/1998], made in the form of a straight bar of figured cross-section, fixed at the bottom of the chute of the lock, across it, characterized in that the cross section of the stencil is given the shape of a triangle, while the face fixed on the gutter is made smooth, the second face is inclined to the base at an acute angle and is equipped with catching protrusions placed parallel to each other and the edge formed by the intersection of these faces, and the third face is made in the form of a gutter, the longitudinal axis of which is parallel to the longitudinal axis of the stencil, wherein the angle between the base and the second face is 10-15°, and the cross section of the catching protrusions is given the shape of a right triangle, while the catching protrusions are fixed on the second face by the side constituting a right angle with the other side of the catching protrusion, and the latter is placed on the side of the rib, formed by the intersection of the base of the stencil and its second face.

The disadvantage of this analog is that when it is used, it does not provide effective capture of fine gold from refractory sands and ores, due to the inefficient transformation of laminar pulp flows into turbulent flows.

The closest in technical essence is the INSTALLATION FOR THE EXTRACTION OF FINE GOLD [RU 2160164 (C1), publ.: 12/10/2000], containing a straight inclined chute with stencils and rigidly fixed arcuate slats, characterized in that the arcuate slats are installed with a tapering gap for the main pulp flow, the installation is equipped with removable flow dividers located parallel to the bottom, and removable fine gold traps, the inner part of which is formed by straight and rounded walls, and the upper part is made in the form of two inclined planes mounted on arcuate strips and located at the opposite angle of inclination, with gap relative to one another and with the formation of a threshold.

The disadvantage of the prototype is the low efficiency of extracting particles of precious metals from the pulp flow.

The objective of the invention is to eliminate the disadvantages of the prototype.

The technical result of the invention is to increase the recovery factor of precious metals.

The specified technical result is achieved due to the fact that the stencil of the gateway of the device for enriching precious metals, containing side walls with the corrugations installed across them and the flow direction strips placed on them, characterized in that the side walls of the stencil are made with an inclination from the longitudinal axis of symmetry of the stencil at an angle relative to horizontal plane from 90° to 110°, mainly 100°, the corrugations are made of a longitudinally curved metal profile containing three steps, while the first step is made at an angle of 60° to 80°, mostly 70°, relative to the horizontal plane of the stencil in the direction of the direction movement of the pulp, the second stage is made parallel to the horizontal plane of the stencil in the direction of the movement of the pulp, and the third stage is made parallel to the first stage upwards at an angle of 60° to 80°, mainly 70°, relative to the horizontal plane of the stencil, mounted on the corrugations in a checkerboard pattern in n several rows along the length of the stencil of the flow direction strip, connecting the mentioned riffles in pairs, while the odd rows of the flow direction strips are mounted on the riffles at a negative angle of inclination to the riffles at the stop point from -25° to -45°, mainly -35°, and even rows of flow direction bars are mounted on corrugations at a positive angle of inclination to the corrugations 2 at the stop point from 25° to 45°, mainly 35°, and the last row of said bars connects the last corrugation and the plate limiting the stencil, while even rows of flow direction bars connect they are the extreme corrugations of the corrugation rows connected by even rows of flow direction strips between them.

In particular, at the ends of the side walls of the stencil, supporting heels are orthogonally mounted, which are made with the possibility of ensuring that the stencils rest against each other when they are mounted in a row.

In particular, the flow direction bars on the corrugations are mounted with a tongue and groove connection.

Brief description of the drawings.

In FIG. 1 shows a general view of the stencil of the lock of a device for enriching precious metals.

In FIG. 2 is a side view of the stencil of the gateway of the precious metal refinery.

In FIG. 3 is a plan view of the stencil of the gateway of a precious metal refinery.

In FIG. 4 shows a cross-section of the stencil of the gateway of the precious metal enrichment device.

In FIG. 5 shows a side view of the flow direction bar.

The figures indicate: 1 - side wall, 2 - corrugation, 3 - plate, 4 - support heel, 5 - flow direction bar, 6 - recess for fastening.

Implementation of the invention.

The stencil of the gateway of the device for enrichment of precious metals (see Fig. 1) is formed by side walls 1 interconnected by corrugations 2 mounted across the said side walls 1 at regular intervals, and by a plate 3 mounted along the lower edge of the stencil, while these side walls 1 are made with an inclination from the longitudinal axis of symmetry of the stencil and the angle Ω of inclination of the side walls 1 is made from 90° to 110°, preferably 100°, relative to the horizontal plane of the stencil (see Fig. 2). The number of grooves 2 in the stencil can be different in different implementations and is determined by the length of the lock and the requirements for the weight and size characteristics of the stencil itself.

The angle Ω of inclination of the side walls 1 in 100° ensures the convenience of removing stencils from the airlock. If the angle Ω of inclination of the side walls 1 is more than 110°, then this leads to clogging of the space between the side wall 1 of the stencil and the side of the airlock with the efel mass, and when the angle Ω of the inclination of the side wall 1 is less than 90°, the support of the stencil inside the airlock is lost.

At the ends of the side walls 1, support heels 4 are mounted transversely, made with the possibility of ensuring that the stencils rest against each other when they are mounted in a row.

Rifles 2 are made of a longitudinally curved metal profile containing three steps (see Fig. 4), while the first step is made at an angle β from 60° to 80°, mainly 70°, relative to the horizontal plane of the stencil and towards the direction of pulp movement, the second stage is made parallel to the horizontal plane of the stencil in the direction of the movement of the pulp, and the third stage is made parallel to the first stage upwards at an angle β from 60° to 80°, mainly 70°, relative to the horizontal plane of the stencil.

The angles β of the bends of the corrugation 2 more than 80° lead to the delay of the pulp flow, and the angles β of the bends of the corrugation 2 less than 60° lead to an increase in the flow rate of the pulp in the sluice and reduce the deposition of particles of precious metals.

On the upper planes of the corrugation 2, at regular intervals, orthogonally to the horizontal plane of the stencil, in a checkerboard pattern, the tongue-and-groove connection of the flow direction strip 5 (see Fig. 3), the spike of which is the corrugation 2, and the grooves are made in the mentioned strips 5 in the form of recesses for fastening 6. The flow direction bar 5 is made of a metal profile in the form of a flat rectangular plate (see Fig. 5).

The flow direction slats 5 are mounted in such a way that the first row of flow direction slats 5 of one of the recesses for fastening 6 is mounted on the first groove 2, and the second recess for fastening 6 is mounted to the second corrugation 2, the second row of flow direction slats 5 of one of the recesses for fastening 6 is mounted on the next corrugation 2, and the second groove for fastening 6 is mounted on the third corrugation 2, etc. The last row of flow direction bars 5 is mounted in the manner described above on the last corrugation 2 and on the plate 3. At the same time, odd rows of flow direction bars 5 are mounted on the corrugations 2 at a negative angle α of inclination to the corrugations 2 at the stop point from -25° to -45 °, preferably -35°, and even rows of flow direction bars 5 are mounted on the corrugations 2 at a positive angle α of inclination to the corrugations 2 at the stop point from 25° to 45°, preferably 35°.

The angle α, formed by the flow direction bar 5 and the corrugation 2 at the stop point, less than 25° leads to a slowdown of the pulp flow in the lock and the predominance of laminar flow over turbulent one, and the angle α is more than 35°, increases the speed of the pulp flow in the lock, which leads to a decrease in the amount of heavy fractions deposited inside the stencil on drag mats.

Even rows of flow direction slats 5 connect the extreme ribs of 2 rows of riffles connected by even rows of flow direction slats 5 between them.

Stencil gateway devices for enrichment of precious metals works as follows.

The stencil of the gateway of the device for enrichment of precious metals is placed inside the sluice of the installation for the enrichment of precious metals from sands (not shown in the figures), while the sluice contains a bottom and side walls, and the distance between the side walls of the sluice corresponds to the distance between the side walls 1 of the stencil.

The stencils are mounted on top of the drag mats placed at the bottom of the lock (not shown in the figures) along the entire length of the lock, resting on each other with the help of support heels 4.

Enriched material in the form of pulp is fed into the upper part of the lock with stencils. The pulp is fed into the lock with such a pressure that the pulp level in the lock does not exceed the upper edge of the flow direction bars 5.

By passing the pulp through the corrugations 2, the flow direction strips 5 create zones of low pressure in the pulp flow. Rifles 2 placed between the side walls 1 of the stencil convert laminar pulp flows into turbulent ones by changing the overall pulp flow rate in the lock, and flow direction bars 5 also change the pulp flow rate by changing the direction of its movement.

In other words, when flowing around a corrugation 2, the pulp undergoes transverse deformation, which leads to a change in speed, and an area of variable speeds and pressures of the pulp flow is created near the surfaces of the corrugations 2 of the stencil. The presence of different pressures at the surface of the stencil corrugation 5 leads to the emergence of hydrodynamic forces and moments. The distribution of these forces depends on the amplitude, the inclination of the sluice and the configuration of the corrugation and stencil, the shape of the solid enclosing bodies. In the formed flows of pulp moving inside the stencil, the particles of precious metals are effectively deposited in the cells of the dredge mats.

EFFECT: increase in the extraction ratio of precious metals in a device for extracting precious metals from sands is achieved due to the fact that the stencil corrugations 2 in the pulp flow create a sharp change in the direction of flow around the stencil, flow deceleration in front of the flow direction bars 5 and subsequent rows of stencils 2, preloading of the streams at the edges of the riffles 2 and the flow direction bars 5 and the formation, immediately behind the upper edges of the flow direction bars 5, a rarefaction zone and large vortices. Whirlwinds in the pulp flow fill the entire area behind the stencil riffles 2 and flow direction bars 5 and cause the precious metals to settle into the cell of the dredging mat. Before the riffles 2 of the stencil, the flow pressure is always greater than in the undisturbed flow, and behind the rifts 2, due to rarefaction, the pressure decreases. This action causes the precious metal particles that have stuck to the water tension film in the upper layer of the flow and to the air bubbles in the flow to interact mechanically with the flow direction bars 5. The film is destroyed, the precious metal particles are released and settle into the cell of the drag mat. Lighter particles, due to the law of the continuity of the jets, pass further along the lock and go into the ephel.

Claims (3)

1. A stencil for a lock of a device for enrichment of precious metals, containing side walls with corrugations installed across them and strips of flow direction placed on them, characterized in that the side walls of the stencil are made with an inclination from the longitudinal axis of symmetry of the stencil at an angle relative to the horizontal plane from 90 ° to 110 °, mostly 100°, the corrugations are made of a longitudinally curved metal profile containing three steps, while the first step is made at an angle of 60° to 80°, mostly 70° relative to the horizontal plane of the stencil in the direction of the direction of pulp movement, the second step is made parallel to the horizontal the plane of the stencil in the direction of the direction of movement of the pulp, and the third stage is made parallel to the first stage upwards at an angle of 60° to 80°, mainly 70° relative to the horizontal plane of the stencil, on the corrugations mounted in a checkerboard pattern in several rows along the length of the stencil flow direction strips connecting said corrugations in pairs, while odd rows of flow direction bars are mounted on the corrugations at a negative angle of inclination to the corrugations at the stop point from -25° to -45°, mainly -35°, and even rows of flow direction bars are mounted on the corrugations under a positive the angle of inclination to the corrugations at the point of stop is from 25° to 45°, mainly 35°, and the last row of said planks connects the last corrugation and the plate limiting the stencil, while even rows of flow direction bars between them connect the extreme corrugations of the corrugation rows. 2. The device according to claim 1, characterized in that at the ends of the side walls of the stencil, supporting heels are orthogonally mounted, made with the possibility of ensuring that the stencils rest on each other when they are mounted in a row. 3. The device according to claim 1, characterized in that the flow direction bars on the corrugations are mounted with a tongue and groove connection.

Images