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INVENTION
Patent of the Russian Federation RU2194579

GATEWAY FOR BROADCASTING

The name of the inventor: Belogay Pavel Dmitrievich (UA); Tischenko Alexander Georgievich (UA); Kaitmazov N.G. (RU); Zakharov B.A.
The name of the patent holder: Belogay Pavel Dmitrievich (UA); Tischenko Alexander Georgievich (UA); Kaitmazov Nikolay Georgievich (RU); Zakharov Boris Alekseevich
Address for correspondence: 51700, Dnipropetrovs'ka obl., Volnogorsk, ul. October, 8/11, apt.5, PD Belogayu
Date of commencement of the patent: 2000.10.26

The invention relates to the enrichment of materials, in particular, the enrichment of placers and ores of noble and rare metals by their wet gravitational separation in a flow of pulp flowing along an inclined working surface. The slag for enrichment of placers includes an inclined trough with a bottom and side walls, in which on the bottom, longitudinally to the flow of pulp, there are riffles with grooves between them, a loading unit and a discharge unit with a heavy fraction cutter, while the slope of the trough and the flute is tilted with increasing slope In the direction of the cut-off of the unloading unit. The invention makes it possible to increase the recovery efficiency of fine grains of the heavy fraction.

DESCRIPTION OF THE INVENTION

The invention relates to the enrichment of materials, in particular, the enrichment of placers and ores of noble and rare metals by their wet gravitational separation in a flow of pulp flowing along an inclined working surface.

A sluice for the enrichment of placers is known under patent of the Russian Federation No. 2043162, publ. 10.09.95, M.Kl ⁶ V 03 V 5/26, 5/70, containing inclined trough with bottom and side walls, reefs, loading unit and unloading unit with heavy fraction cut-off. In this case, the ribs are located at an angle to the pulp flow, and the discharge unit with the heavy fraction cutoff is located along the bottom of the lock in the lower part of the grooves between the corrugations. In the upper part of the grooves of the riffle, air is supplied from the holes for more intensive precipitation of fine grains of the heavy fraction.

The main disadvantage of this gateway is its low enrichment efficiency, due to the filling of grooves between the corrugations when they are positioned at an angle to the flow of pulp, which worsens the precipitation of heavy pulp fractions in the grooves between the corrugations, despite the air supply through the holes in the upper part of the flute.

Another disadvantage of this gateway is its low economy, due to the need for energy consumption for air supply.

The closest to the claimed solution for the technical essence and the technical result achieved is the sluice for the enrichment of placers under patent of the Russian Federation 2,026,744, publ. 20.01.95, M.C. 6B 03B 5/26, 5/70, containing an inclined trough with a bottom and side walls in which the bottom, longitudinally to the flow of the pulp, is located the riffles with grooves between them, the loading unit and the unloading unit with Heavy fraction cutter. In this case, the section of the flutes is triangular in shape and the riffles are fastened to the flat bottom of the sluice gutter, and the cutoff holes are made in each groove between the flutes and have the shape of a swallowtail.

In this gateway, the efficiency of its operation is increased, because There is no need for energy costs for air supply and the enrichment efficiency is slightly increased due to the arrangement of the flutes along the pulp flow, which reduces the filling of grooves between the flutes.

At the same time, the main disadvantage of this gateway is also the low efficiency of extraction of fine grains of heavy fraction due to the equally high rate of pulp flow from the loading unit to the cut-off of the unloading unit, which is caused by the inclination of the trough with corrugations at one angle along its entire length and which, Siltation of the grooves of the flute has a sufficiently large value. Such a large tilt angle of the gutter in front of the cutter and does not exclude the possibility of plugging grooves between the corrugations in the end part of the gutter and the cutter itself with larger light fraction grains.

The invention is based on the task of increasing the recovery efficiency of fine grains of heavy fraction by slowing the flow rate of the pulp in the initial portion of the trough, from the loading unit to the middle of the trough, and increasing the flow rate of the pulp as it moves to the unloading unit cut-off, Grains of heavy fraction into the bottom part of the grooves between the corrugations in the initial part of the trough and a reduction in the possibility of plugging grooves between the corrugations and the cutter by larger grains of the light fraction.

The task is solved by the fact that the sluice for enrichment of placers contains an inclined trough with a bottom and side walls in which the ribs with grooves between them, the loading unit and the unloading unit with the heavy fraction cutter are located on the bottom, longitudinally to the pulp flow. In this case, the inclination of the bottom of the trough and the groove is made with increasing steepness in the direction towards the cut-off of the unloading unit. In addition, the sluice contains an inclined sieve located above the flutes, and the slope of which, in the direction of the pulp flow, is made corresponding to the steepness of the bottom of the trough and the flute. The screen is made in the form of a tie grating. And the cross-section of grooves between the corrugations is made of trapezoidal shape. And the height of the riffles decreases towards the cut-off of the discharge unit. The gateway also includes a device for adjusting the angle of the trough.

The tilting of the bottom of the trough and the grooves with increasing steepness towards the cut-off of the discharge unit allows to slow down the flow rate of the pulp in the initial part of the trough, from the loading unit to the middle part of the trough, and to increase the flow rate of the pulp further as it moves to the cut-off of the unloading unit. Reduction of the flow velocity of the pulp in the initial part of the trough is ensured by a decrease in its average slope angle in this part in comparison with the known sluices. In this case, the elimination of siltation of the grooves between the corrugations is provided both by adjusting the optimal tilt angle of the trough and the increasing slope of the bottom of the trough with the corrugations in its initial part, which further increases further when the pulp moves to the unloader's cut-off, which further prevents the possibility of plugging between And the cutter itself with larger light fraction grains. Thus, it is possible to sink to the bottom of the grooves between the corrugations in the initial portion of the trough of most of the fine grains of the heavy fraction.

The use of an inclined sieve located above the grooves of the gutter and with the same slope as the bottom and ridge of the gutter ensures that more uniform grains of light and heavy fractions enter the grooves between the corrugations, thereby greatly reducing the possibility of plugging the grooves of the riffles And the cutter by large particles of rock. And the correspondence of the steepness of the sieve surface to the steepness of the bottom and the riffles ensures a more uniform filling of the sluice gutter, including the grooves of the riffles, with homogeneous grains of pulp for their further layerwise separation.

The implementation of the sieve in the form of a tie grating makes it possible to provide a more complete and more productive sieving of uniformly sized grains of rock to the corrugated part of the sluice gutter.

Performing a section of grooves between the corrugated corrugations allows the uniform distribution along the width of the bottom of the gutter groove in the bottom layer of the pulp in the bottom part of the groove grooves and thus allows the cutter to more fully cut off the heavy fraction.

Reducing the height of the flutes in the direction of the cut-off of the unloading unit makes it possible to ensure uniform distribution along the width of the grains of the rock in the lower layer of the pulp in the bottom part of the trough near the cutter and thus allows the cutter to cut off the concentrate with a high content of heavy fraction.

The execution of the gateway with the device for adjusting the angle of the trough allows to determine the most optimal tilt angle for a particular case of placer concentration.

The foregoing confirms the existence of cause-effect relationships between the set of essential features of the claimed invention and the technical result achieved.

This set of essential features allows, in comparison with the prototype, to increase the subsidence in the bottom part of the grooves between the corrugations, in the initial part of the trough, most of the fine grains of the heavy fraction and excludes the possibility of plugging grooves between the corrugations in the final part of the trough and the cutter itself with larger light fraction grains. This is due to a slight increase in the flow rate of the pulp in the initial part of the trough and a large increment in velocity in the final part of the trough.

According to the authors, the claimed technical solution meets the criteria of the invention "novelty" and "inventive level", because The set of essential features that characterize the claimed gateway for enrichment of placers is new and should not be explicitly known from the prior art.

The claimed invention is explained by the drawings, in which like elements have the same numerals and where

In Fig. 1 is a schematic representation of a sluice for enriching placers; In Fig. 2 is a section along AA in FIG. 1.

A preferred embodiment of the sluice for dressing placers comprises an inclined trough 1 with sidewalls 2 and 3, riffles 5 with grooves 6 therebetween are disposed in the bottom 1 of the trough 1, a loading unit 7 and a discharge unit comprising a heavy fraction cutoff 8, an outlet 9 of large rock particles, Yield 10 of light fraction, yield 11 of heavy fraction. Above the corrugations 5 there is a screen 12, made in the form of a siege grating (tie sieve). And the sluice comprises a tilting device 13 for tilting the trough 1. The steepness of the inclination of the trough 1 and the flutes 5 with the grooves 6 increases in the direction of the unloading unit cut-off 8, and the grooves 6 between the riffles 5 are of a trapezoidal shape. In addition, the height of the corrugations 5 decreases toward the opening of the cut-off element 8 of the discharge unit. The gateway also contains receivers 14, 15, respectively, of heavy and light fractions.

THIS GATEWAY IS WORKING IN THE FOLLOWING MODE

The enriched pulp is fed to the feed unit 7, wherece the pulp flow moves along the screen 12, through which the pulp with uniform grains of the rock passes to the ridges 5 with the grooves 6 of the bottom 4, and not the part that has passed in the form of coarse rock particles through the outlet 9 Discharging unit enters the light fraction receiver 15 or enters further processing. The grains of light and heavy fractions in the form of a pulp pass through the screen 12 by gravity along the grooves 6 and the cores 5 of the bottom 4, and as a result of the difference in the speeds of the grains of the heavy and light fractions having different densities, their stratification occurs: the heavy fraction passes to the lower layers (Into the lower part of the grooves 6 between the corrugations 5), and the light fraction moves at a higher speed over the lower layers, particularly in the upper parts of the grooves 6 and above the corrugations 5. At the same time, due to the increasing curvature of the bottom 4 with the corrugations 5 and grooves 6, The difference in the speeds of the heavy and light fractions, which causes an even greater transition of fine grains of the heavy fraction to the lower layers of the pulp. By decreasing the height of the flutes in the transition of the pulp to the opening of the cutter 8, the exfoliated pulp is a continuous lower layer of the heavy fraction and a continuous top layer of the light fraction. Through the opening of the discharge unit shutter 8, the heavy fraction, as having the slowest speed, falls into the heavy fraction (concentrate) receiver 14, and the light fraction, as having a high speed and moving in the upper layer of the pulp, slips through the opening of the shutter 8 and through the output 11 is discharged Into the corresponding light-fraction receiver (s) 15, where large particles of the rock also enter the screen 12. If necessary, the device 13 adjusts the angle of inclination of the bottom 4 of the lock in order to select the optimal separation of light and heavy fractions without pouring and clogging large beads of light fraction of the grooves 6 between the corrugations 5 and the opening of the shutter 8.

In another embodiment, the ridges 5 and the grooves 6 may be triangular or some other suitable shape, and separate holes may be provided in the screen 12.

If it is necessary to carry out cleanings of the separated light fraction, several locks can be located in series and installed on a common frame.

In one embodiment of the lock, the width of the grooves 6 between the corrugations 5 is narrowed toward the cut-off element 8 of the discharge unit, while the height of the corrugations 5 towards the shutter 8 of the discharge unit is increased. This makes it possible to increase the concentration of grains of the heavy fraction in the pulp flow in the bottom layers in the grooves between the corrugations by stacking the grains on each other, so that the height of the heavy fraction layer in front of the cutter increases and the velocity decreases, while the velocity of the upper layer of the light fraction remains practically Unchanged due to its movement in the upper part of the grooves between the corrugations and / or over the corrugations.

The conformity of the claimed technical solution with the criterion of the invention "industrial applicability" is confirmed by this example of the implementation of the sluice for the beneficiation of placers.

CLAIM

1. A slurry for enriching placers, comprising an inclined trough with a bottom and side walls, in which a ribbed groove is disposed in the longitudinal direction of the pulp flow, a loading unit and a discharge unit with a heavy fraction cutter, characterized in that the inclination of the trough bottom and The corrugation is made with increasing steepness towards the cut-off of the discharge unit.

2. A gateway according to claim 1, characterized in that it comprises an inclined sieve arranged above the flutes and whose slope in the direction of the pulp flow is made corresponding to the slope of the trough bottom and the flute.

3. A gateway according to claim 2, characterized in that the sieve is made in the form of a tie grating.

4. A gateway according to any one of claims 1 or 2, characterized in that the cross-section of the grooves between the corrugations is of a trapezoidal shape.

5. A gateway according to any of the preceding claims. 1-4, characterized in that the height of the corrugations decreases in the direction towards the cut-off of the discharge unit.

6. A gateway according to any of the preceding claims. 1-5, characterized in that it comprises a device for adjusting the tilt of the trough.

7. A gateway according to claim 1, characterized in that the width of the grooves between the corrugations is narrowed towards the cut-off of the discharge unit.

8. Gateway according to claim 7, characterized in that the height of the flutes increases in the direction towards the cut-off of the unloading unit.

print version
Date of publication 14.03.2007gg

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