CN222567993U - Multipath heavy medium feeding device - Google Patents

Abstract

The application provides a multipath heavy medium feeding device which comprises a qualified medium barrel, a first feeding pipeline, a second feeding pipeline and at least one qualified medium feeding pump, wherein a liquid level meter is arranged in the qualified medium barrel, the top of the qualified medium barrel is connected with a water supplementing pipeline and a material supplementing pipeline through a water supplementing valve and a material supplementing valve respectively, an inlet of the qualified medium feeding pump is connected with the qualified medium barrel, an outlet of the qualified medium feeding pump is connected with heavy medium feeding ports of first heavy medium sorting equipment and second heavy medium sorting equipment through the first feeding pipeline and the second feeding pipeline respectively, a first flow regulating valve is arranged on the first feeding pipeline, and a second flow regulating valve and a first clear water regulating valve are arranged on the second feeding pipeline. The multipath heavy medium feeding device provided by the application can provide two-stage heavy medium feeding with adjustable density range for a cascade coarse coal slime heavy medium sorting system.

Description

Multipath heavy medium feeding device

Technical Field

The application belongs to the technical field of dense medium coal dressing, and particularly provides a multipath dense medium feeding device.

Background

The coarse slime of 1.0 mm-0.2 mm size grade obtained in the coal exploitation process is efficiently separated through the coarse slime separation system, so that the coal yield can be effectively improved, the waste of coal resources is avoided, and more industry attention is paid at present.

The existing coal slime separation equipment mainly comprises a coal slime heavy medium cyclone, a spiral separator, a heavy medium interference bed separator and a coarse coal slime heavy medium separation system formed by combining the above equipment, as disclosed in patent CN105597914A, the system comprises a two-stage separation structure by a cascade coal slime water-level cyclone and a heavy medium interference bed separator, and after the bottom flow of the coal slime water-level cyclone enters the heavy medium interference bed separator, recovery operation of clean coal and middlings (or gangue) is carried out through overflow and bottom flow of the heavy medium interference bed respectively.

In the two-stage separation framework, the coal slime water classification cyclone and the dense medium interference bed separator are required to be provided with independent coal slime water barrels and qualified medium barrels, and particularly, the mixing barrel and the mixing pump which are required to be independently arranged are required to be mixed with each other, so that the feeding part structure and the treatment process are complex, the operation energy consumption is increased, meanwhile, the crushing problem is easy to occur in the coal slime mixing and conveying process, and in order to solve the problem, the two-stage dense medium separation equipment can be cascaded to form a two-stage dense medium separation system so as to replace the framework of the original coal slime water classification cyclone cascaded dense medium interference bed separator, and obviously, the feeding structure of dense medium suspension is required to be optimized, so that the heavy medium feeding meets the feeding standard of the two-stage dense medium separation equipment.

Disclosure of utility model

In order to solve the problems in the prior art, the application provides a multipath heavy medium feeding device which is used for providing heavy medium suspension for first heavy medium sorting equipment and second heavy medium sorting equipment which are cascaded in a coarse coal slime heavy medium sorting system, wherein the multipath heavy medium feeding device comprises a qualified medium barrel, a first feeding pipeline, a second feeding pipeline and at least one qualified medium feeding pump, a liquid level meter is arranged in the qualified medium barrel, the top of the qualified medium barrel is connected with a water supplementing pipeline and a material supplementing pipeline through a water supplementing valve and a material supplementing valve respectively, an inlet of the qualified medium feeding pump is connected with the qualified medium barrel, an outlet of the qualified medium feeding pump is connected with heavy medium feeding ports of the first heavy medium sorting equipment and the second heavy medium sorting equipment through the first feeding pipeline and the second feeding pipeline respectively, and a first flow regulating valve and a first clear water valve are arranged on the first feeding pipeline.

The heavy medium separation device comprises a first heavy medium separation device, a heavy medium interference bed separator, a second heavy medium separation device and a density ratio between heavy medium suspension entering the heavy medium cyclone through a first feeding pipeline and heavy medium suspension entering the heavy medium interference bed separator through a second feeding pipeline, wherein the density ratio is 1.1-1.5.

Preferably, the first feeding pipeline is further provided with a first densimeter, a first magnetic substance content meter and a first pressure transmitter, the second feeding pipeline is further provided with a second densimeter, a second magnetic substance content meter and a second pressure transmitter, and the first clear water regulating valve is arranged at the front end of the second densimeter.

The two qualified medium feeding pumps are respectively a first qualified medium feeding pump and a second qualified medium feeding pump, an outlet of the first qualified medium feeding pump is connected with the first feeding pipeline, and an outlet of the second qualified medium feeding pump is connected with the second feeding pipeline.

Further, the connection position of the first qualified medium feeding pump and the qualified medium barrel is not higher than the connection position of the second qualified medium feeding pump and the qualified medium barrel.

The multipath heavy medium feeding device further comprises a third feeding pipeline, one end of the third feeding pipeline is connected with the qualified medium feeding pump, and the other end of the third feeding pipeline penetrates through the pre-rotation wetting pipe along a tangent line and enters the coal slime feeding hopper.

Preferably, the third feeding pipeline is provided with a third flow regulating valve, a third densimeter, a third magnetic substance content meter, a third pressure transmitter and a second clear water regulating valve, and the second clear water regulating valve is arranged at the front end of the third densimeter.

Preferably, the density of the dense medium suspension entering the coal slurry feed hopper through the third feed line is not greater than the density of the dense medium suspension entering the dense medium cyclone through the first feed line.

Preferably, the upper part of the qualified medium barrel is of a cylindrical structure, the lower part of the qualified medium barrel is of a conical structure, and a high-pressure air blast device is arranged at the bottom of the qualified medium barrel.

The multichannel dense medium pan feeding device that this embodiment provided optimizes the pan feeding structure of current coarse slime dense medium sorting system, only uses a qualified medium bucket, provides the dense medium suspension of density difference for two-stage dense medium sorting device simultaneously through first pan feeding pipeline and second pan feeding pipeline, need not to additionally set up the compounding bucket with qualified medium suspension and the even mixing of entering the coal slime, has reduced equipment quantity and operation energy consumption effectively, and avoided the coal slime to mix and the excessive crushing problem in the transmission process, simultaneously through first clear water governing valve, adjusts the dense medium suspension in two pan feeding pipelines to suitable density ratio scope to satisfy the pan feeding standard of two-stage dense medium sorting equipment to dense medium suspension.

Drawings

Fig. 1 is a schematic diagram of a frame of a multi-path heavy medium feeding device according to an embodiment of the present application;

Fig. 2 is a schematic connection diagram of a multi-path heavy medium feeding device provided by the embodiment of the application for providing heavy medium feeding for a coarse slime heavy medium sorting system;

Fig. 3 is a schematic frame diagram of a multi-path heavy medium feeding device according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a frame of a multi-path dense medium feeding device and connection of the frame to provide dense medium feeding for a coarse slime dense medium sorting system according to an embodiment of the present application;

fig. 5 is a schematic structural view of the heavy medium cyclone in fig. 4.

Reference numerals in the figures

The multi-path heavy medium feeding device 1, the qualified medium barrel 11, the water supplementing valve 111, the water supplementing pipeline 112, the material supplementing valve 113, the material supplementing pipeline 114, the first qualified medium feeding pump 121, the second qualified medium feeding pump 122, the first feeding pipeline 131, the first flow regulating valve 1311, the first magnetic substance content meter 1312, the first density meter 1313, the first pressure transmitter 1314, the second feeding pipeline 132, the second flow regulating valve 1321, the first magnetic substance content meter 1322, the second density meter 1323, the second pressure transmitter 1324, the first clear water regulating valve 1325, the third feeding pipeline 133, the third flow regulating valve 1331, a third magnetic substance content meter 1332, a third densitometer 1333, a third pressure transmitter 1334, a pre-rotation wetting pipe 1335, a heavy medium cyclone 2, a cylinder 21, a medium feed port 22, an overflow port 23, a bottom flow port 24, a coal slime feed hopper 25, a feed pipeline 26, a bracket 27, a heavy medium interference bed separator 3, a clean coal extraction device 4, a clean coal medium-removing laminated high-frequency fine screen 41, a clean coal magnetic separator 42, a clean coal laminated high-frequency fine screen 43, a clean coal slime centrifugal dehydrator 44, a shunt valve 45, a tail coal extraction device 5, a tail coal medium-removing laminated high-frequency fine screen 51, a tail coal magnetic separator 52, a tail coal laminated high-frequency fine screen 53 and a tail coal slime centrifugal dehydrator 54.

Detailed Description

The present application will be further described below based on preferred embodiments with reference to the accompanying drawings.

In the description of the embodiments of the present application, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the embodiments of the present application conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, in the description of the present application, terms first, second, etc. are used herein for distinguishing between different elements, but not limited to the order of manufacture, and should not be construed as indicating or implying any relative importance, as such may be different in terms of its detailed description and claims.

The terminology used in the description presented herein is for the purpose of describing embodiments of the application and is not intended to be limiting of the application. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via an intermediate medium, or communicating between two elements. The specific meaning of the above terms in the present application will be specifically understood by those skilled in the art.

The application provides a multipath heavy medium feeding device which is arranged in a coarse slime heavy medium sorting system adopting a two-stage heavy medium sorting framework and is used for providing heavy medium suspension meeting standards for a first heavy medium sorting device and a second heavy medium sorting device which are cascaded. Fig. 1 is a schematic frame diagram of a multi-path heavy medium feeding device 1 according to some preferred embodiments of the present application.

As shown in fig. 1, the multi-path heavy medium feeding device 1 comprises a qualified medium barrel 11, a first qualified medium feeding pump 121, a first feeding pipeline 131 and a second feeding pipeline 132, wherein an inlet of the first qualified medium feeding pump 121 is connected with the qualified medium barrel 11, and an outlet of the first qualified medium feeding pump is connected with heavy medium feeding ports of a first heavy medium sorting device and a second heavy medium sorting device through the first feeding pipeline 131 and the second feeding pipeline 132 respectively, so that heavy medium suspension in the qualified medium barrel is pumped into the first heavy medium sorting device and the second heavy medium sorting device respectively.

Preferably, the upper part of the qualified medium barrel 11 is in a cylindrical structure, the lower part is in a conical structure, a liquid level meter (not shown in the figure) is arranged in the qualified medium barrel, the top of the qualified medium barrel is respectively connected with a water supplementing pipeline 112 through a water supplementing valve 111, the top of the qualified medium barrel is connected with a water supplementing pipeline 114 through a material supplementing valve 113, the liquid level meter is controlled to be locked with the water supplementing valve 111 and the material supplementing valve 113, when the liquid level in the qualified medium barrel 11 is lower than a preset lower limit (such as 50%), new clear water and medium powder (such as magnetite powder) are supplemented through the water supplementing valve 111 and the material supplementing valve 113 according to a preset proportion, and when the liquid level in the qualified medium barrel 11 reaches a preset upper limit (such as 80%), the liquid level is normal, and stable production is ensured. Furthermore, in some preferred embodiments, the bottom of the acceptable media bucket 11 is provided with a high pressure blast device to prevent the problem of accumulation of magnetite powder from settling.

Further, as shown in fig. 1, a first flow rate adjusting valve 1311 is disposed on the first feeding pipeline 131, and a second flow rate adjusting valve 1321 is disposed on the second feeding pipeline 132, for controlling the flow rates of the heavy medium suspension pumped into the first heavy medium sorting device and the second heavy medium sorting device, respectively.

In some preferred embodiments, as shown in fig. 1, a first magnetic substance content meter 1312 and a first density meter 1313 are further disposed on the first feeding pipeline 131, a second magnetic substance content meter 1322 and a second density meter 1323 are further disposed on the second feeding pipeline 132, and a density meter and a magnetic substance content meter are disposed on the first feeding pipeline 131 and the second feeding pipeline 132, respectively, so that the density and the magnetic substance content of the synthetic medium suspension can be detected online, and the density and the magnetic substance content of the qualified medium suspension on each feeding pipeline can be adjusted through water supplement or medium supplement.

In some preferred embodiments, a first pressure transmitter 1314 is further provided on the first feed line 131 near the media feed port of the first dense media separation device for real-time detection and adjustment of the pressure of the dense media suspension entering the first dense media separation device (in embodiments of the application, the dense media suspension entering the first dense media separation device through the first feed line 131 is represented by the first dense media suspension), and a second pressure transmitter 1324 is provided on the second feed line 132 near the media feed port of the second dense media separation device for real-time detection and adjustment of the pressure of the dense media suspension entering the second dense media separation device (in embodiments of the application, the dense media suspension entering the second dense media separation device through the second feed line 132 is represented by the second dense media suspension).

When a cascade structure of two-stage heavy medium separation equipment is adopted, gradient separation products can be formed by setting the density of heavy media in the two-stage heavy medium separation equipment, for example, fig. 2 shows a coarse slime heavy medium separation system for providing two-stage heavy medium feeding through the multipath heavy medium feeding device 1, in the system, the first-stage heavy medium separation equipment is a heavy medium cyclone 2, the second-stage heavy medium separation equipment is a heavy medium interference bed separator 3, wherein a medium feeding port of the heavy medium cyclone 2 receives heavy medium suspension from a qualified medium barrel 11 through a first feeding pipeline 131 and rotates at a high speed in a barrel body of the heavy medium cyclone, a slime feeding funnel is arranged at the upper part of the slime heavy medium cyclone 2, coarse slime in an original state is fed into the slime heavy medium cyclone 2 through the slime feeding funnel in a non-pressure mode, efficient separation is performed under the centrifugal force, slurry containing clean coal components is discharged through an overflow port of the coarse slime to enter a clean coal extraction device 4, and high-density tailings slurry is discharged through an overflow port of the clean coal components to enter the dense interference bed separator 3.

The medium feed port of the dense medium interference bed separator 3 receives dense medium suspension liquid from the qualified medium barrel 11 through the second feed pipeline 132, and under the action of an interference bed, the slurry entering from the bottom flow port of the coal slime dense medium cyclone 2 is further separated according to the density difference, the slurry with lower density enters the clean coal extraction sub-device 4 through the overflow port, and the slurry with higher density enters the tail coal extraction device 5 through the bottom flow port.

In some specific embodiments, the clean coal extraction device 4 comprises a cascade clean coal medium-removing laminated high-frequency fine screen 41, a clean coal magnetic separator 42, a clean coal laminated high-frequency fine screen 43 and a clean coal slime centrifugal dehydrator 44, wherein overflow ports of the dense medium cyclone 2 and the dense medium interference bed separator 3 are connected with the clean coal medium-removing laminated high-frequency fine screen 41, overflow products are combined and enter the clean coal medium-removing laminated high-frequency fine screen 41 to carry out medium-removing treatment, undersize products of the clean coal medium-removing laminated high-frequency fine screen 41 are returned to a qualified medium barrel 11, concentrate products recovered by the clean coal magnetic separator 42 are returned to the qualified medium barrel 11 after being diluted to 15-25%, tailing products enter the clean coal laminated high-frequency fine screen 43 to carry out dehydration and desliming treatment, overstock products of the clean coal laminated high-frequency fine screen 43 enter the clean coal centrifugal dehydrator 44 to carry out final water control, dehydration products are qualified concentrate products, centrifugal liquid of the concentrate products enter the floatation device, and the floatation device is preferably arranged on the flotation device, and the filter device 4 is further comprises a shunt valve arranged on the screen 11 and a high-removing laminated high-frequency fine screen medium-frequency fine screen 41 to reduce the content of the undersize products to be returned to the qualified medium barrel 41, and the suspension medium-removing laminated high-frequency fine screen 41 is returned to the high-frequency fine screen medium-frequency fine screen 41.

The tail coal extraction device 5 comprises a cascade tail coal medium-removing laminated high-frequency fine screen 51, a tail coal magnetic separator 52, a tail coal laminated high-frequency fine screen 53 and a tail coal slime centrifugal dehydrator 54.

The underflow of the dense medium interference bed separator 3 is connected with a tail coal medium-removing laminated high-frequency fine screen 51, an underflow product of the dense medium interference bed separator enters the tail coal medium-removing laminated high-frequency fine screen 51 to be subjected to medium-removing treatment, screen bottoms of the tail coal medium-removing laminated high-frequency fine screen 51 return to a qualified medium barrel 11, the screen bottoms are diluted by clear water to a concentration of 15-25% and enter a tail coal magnetic separator 52, concentrate products of the tail coal magnetic separator 52 return to the qualified medium barrel 11, the tailing products enter a tail coal laminated high-frequency fine screen 53, screen bottoms of the tail coal laminated high-frequency fine screen 53 enter a tail coal slime centrifugal dehydrator 54, the screen bottoms enter a thickener, and a dehydration product of the tail coal slime centrifugal dehydrator 54 is tail coal, and centrifugate enters the thickener.

Typically, the dense media disturbing bed separator 3 requires a relatively low rising media density and concentration relative to the slime dense media cyclone 2, i.e. the density of the first dense media suspension is higher than the density of the second dense media suspension, preferably in a ratio of 1.1-1.5.

In order to adjust the density ratio of the first dense medium suspension to the second dense medium suspension, as shown in fig. 1, a first clear water adjusting valve 1325 is further disposed on the second feeding pipe 132, the first clear water adjusting valve 1325 is disposed at the front end of the second densitometer 1323, and on the basis of the density of the first dense medium suspension obtained from the first qualified medium feeding pump 12 through the first densitometer 1313, the amount of additional clear water is adjusted through the first clear water adjusting valve 1325, and the density of the second dense medium suspension obtained after dilution is detected through the second densitometer 1323, thereby realizing that the density/concentration ratio of the second dense medium suspension to the first dense medium suspension is adjusted to a suitable range.

Through the arrangement, the multipath heavy medium feeding device 1 can perform efficient heavy medium feeding operation on a coarse slime heavy medium sorting system adopting a two-stage heavy medium sorting framework, on the basis of using only one qualified medium barrel 11, heavy medium suspensions with different densities are simultaneously provided for the two-stage heavy medium sorting device through the first feeding pipeline 131 and the second feeding pipeline 132, a mixing barrel for uniformly mixing the qualified medium suspensions with the selected slime is not required to be additionally arranged, the equipment quantity and the operation energy consumption are effectively reduced, the excessive crushing problem in the slime mixing and conveying process is avoided, and meanwhile, the heavy medium suspensions in the two feeding pipelines are adjusted to a proper density ratio range through the first clear water regulating valve 1325 so as to meet the feeding standard of the heavy medium suspensions by the two-stage heavy medium sorting equipment.

Fig. 3 illustrates a frame structure diagram of a multi-path heavy medium feeding device 1 according to some preferred embodiments of the present application, and the number of qualified medium feeding pumps of the heavy medium feeding device 1 is two, namely, a first qualified medium feeding pump 121 and a second qualified medium feeding pump 122, except for the same parts as those in fig. 1, wherein a first feeding pipeline 131 is still connected to the first qualified medium feeding pump 121, and a second feeding pipeline 132 is connected to the second qualified medium feeding pump 122, and qualified medium suspension is pumped into a second heavy medium sorting device by the second qualified medium feeding pump 122.

Preferably, as shown in fig. 3, the first qualified medium feeding pump 121 and the second qualified medium feeding pump 122 are disposed at different heights of the qualified medium tank 11, wherein the connection position of the second qualified medium feeding pump 122 and the qualified medium tank 11 is higher than the connection position of the first qualified medium feeding pump 121 and the qualified medium tank 11, and the two have a height difference of H.

The reason why the second qualified medium feed pump 122 is separately provided to the second feed line 132 and the two feed pumps are formed to have a certain height difference is that the density of the second dense medium suspension entering the second dense medium separation apparatus (such as the dense medium bed separator 3 in fig. 2) is generally required to be lower than that of the first dense medium suspension entering the first dense medium separation apparatus (such as the dense medium cyclone 2 in fig. 2), and the density of the magnetic medium in the dense medium suspension is significantly prone to fall by gravity, so that the density of the medium suspension in the qualified medium tank 11 tends to be layered, so that the density of the suspension in the lower portion of the qualified medium tank 11 is naturally higher than that in the upper portion, by lifting the position of the second qualified medium feed pump 122, the pumped suspension can be made to be closer to that required by the dense medium bed separator 3 than that of the first qualified medium feed pump 121, and the operation requirement can be achieved without excessively performing the dilution operation.

Because in the coarse slime heavy medium sorting system shown in fig. 2, slime directly enters the barrel of the heavy medium cyclone through the slime feeding funnel by means of self gravity, in order to enable the slime to meet the working index of the cyclone as far as possible when entering the barrel, pre-spinning and pre-wetting treatment can be performed on the slime, and therefore, as shown in fig. 4, in some preferred embodiments, a third feeding pipeline 133 can be further added, and the third feeding pipeline 133 is used for pre-spinning and pre-wetting treatment on the entering slime at the slime feeding funnel of the heavy medium cyclone 2, so that more efficient sorting is realized after the slime enters the barrel.

The third feeding pipeline 133 is provided with a third flow adjusting valve 1331 for adjusting the flow of the heavy medium suspension for pre-spinning and pre-wetting the coal slime, and in some preferred embodiments, the third feeding pipeline 133 is further provided with a third magnetic substance content meter 1332, a third densimeter 1333 and a third pressure transmitter 1334, and the setting mode and the working mode of the devices are the same as or similar to those of the corresponding devices on the first feeding pipeline 131 and the second feeding pipeline 132, which are not repeated herein.

Similar to the previous analysis, the density of the dense medium suspension (referred to as the third dense medium suspension in this embodiment) entering the slurry feed hopper for pre-spinning and pre-wetting the slurry needs to be adjusted according to the properties of the incoming slurry, preferably the density of the third dense medium suspension is less than or equal to the density of the first dense medium suspension.

In fig. 4, the first feeding pipeline 131, the second feeding pipeline 132 and the third feeding pipeline 133 are all connected with the first qualified medium feeding pump 121, in some preferred embodiments, in order to adjust the density of the third qualified medium suspension, a second clear water adjusting valve (not shown in the figure) may also be arranged at the front end of the third densitometer 1333 on the third feeding pipeline 133, in addition, as shown in fig. 3, a second qualified medium feeding pump 122 may also be added, the second feeding pipeline 132 and the third feeding pipeline 133 are provided with feeding through the second qualified medium feeding pump 122, and then the density adjustment is performed in combination with the second clear water adjusting valve, in other preferred embodiments, the third qualified medium feeding pump (not shown in the figure) may be further increased, and the height of the third qualified medium suspension relative to the qualified medium barrel 11 may be set according to the density required to be achieved by the third ternary medium suspension, so as to more effectively adjust the density of the third ternary medium suspension.

Fig. 5 shows a specific structural schematic diagram of the heavy medium cyclone 2 in fig. 4, and as shown in fig. 5, the heavy medium cyclone 2 comprises a cylinder 21, a medium inlet 22, an overflow port 23, a bottom flow port 24 and a coal slime feeding hopper 25.

The coal slime feeding funnel 25 is connected with the barrel 21 through a feeding pipeline 26, so that the feeding coal slime enters the barrel 21 under the action of gravity, the end of the third feeding pipeline 133 is connected with a pre-rotation wetting pipe 1335, the pre-rotation wetting pipe 1335 penetrates through at a tangential angle and enters the inside of the coal slime feeding funnel 25, a centrifugal force field rotating at a high speed is formed in the coal slime feeding funnel 25, and after the feeding coal slime enters, the feeding coal slime can be quickly and uniformly mixed with a third heavy medium suspension rotating at the high speed, so that the rotating speed required by effective separation is obtained, and the aim of high-efficiency separation is achieved.

Further, as shown in fig. 5, the cross section of the medium feeding port 22 is rectangular, and enters the cylinder 21 at one side of the lower part of the coal slime heavy medium cyclone 2 in a tangential mode or an involute feeding mode, and an overflow pipe connected with the overflow port 23 is vertically inserted into a central cavity of the lower part of the cylinder 21, and a bottom flow port 24 is arranged at one side of the upper part of the cyclone, and the size of the bottom flow port is adjustable according to the properties of the processed coal slime and the production index requirements.

In some preferred embodiments, the ratio of the length to the diameter of the barrel 21 ranges from 3.5 to 4.5, the ratio of the caliber of the medium inlet 22 to the diameter of the barrel 21 ranges from 0.20 to 0.25, the ratio of the caliber of the overflow port 23 to the diameter of the barrel 21 ranges from 0.30 to 0.40, the ratio of the caliber of the bottom flow port 24 to the diameter of the barrel 21 ranges from 0.25 to 0.30, the size of the length-diameter ratio determines the separation time of the coal slime in the cyclone, the sizes of the inlet, the overflow port and the bottom flow port have significant influence on the separation index, and the separation index can be customized according to the properties of the coal slime and the production index requirements.

Further, as shown in fig. 5, the cylinder 21 is fixed obliquely by the bracket 27, and the coal slurry feeding direction of the coal slurry feeding hopper 25 is kept vertical.

While the foregoing is directed to embodiments of the present application, other and further embodiments of the application may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (9)

1. A multipath dense medium feeding device provides dense medium suspension for a first dense medium sorting device and a second dense medium sorting device which are cascaded in a coarse coal slime dense medium sorting system, and is characterized in that,

The device comprises a qualified medium barrel, a first feeding pipeline, a second feeding pipeline and at least one qualified medium feeding pump;

The top of the qualified medium barrel is connected with a water supplementing pipeline and a material supplementing pipeline through a water supplementing valve and a material supplementing valve respectively;

the inlet of the qualified medium feeding pump is connected with the qualified medium barrel, and the outlet of the qualified medium feeding pump is connected with the heavy medium feeding ports of the first heavy medium sorting equipment and the second heavy medium sorting equipment through a first feeding pipeline and a second feeding pipeline respectively;

The first feeding pipeline is provided with a first flow regulating valve, and the second feeding pipeline is provided with a second flow regulating valve and a first clear water regulating valve.

2. The multi-path heavy medium feeding device according to claim 1, wherein,

The first dense medium separation device is a dense medium cyclone;

the second heavy medium separation equipment is a heavy medium interference bed separator;

The density ratio between the heavy medium suspension entering the heavy medium cyclone through the first feeding pipeline and the heavy medium suspension entering the heavy medium interference bed separator through the second feeding pipeline is 1.1-1.5.

3. The multi-path heavy medium feeding device according to claim 1, wherein,

The first feeding pipeline is also provided with a first densimeter, a first magnetic substance content meter and a first pressure transmitter;

The second feeding pipeline is further provided with a second densimeter, a second magnetic substance content meter and a second pressure transmitter, and the first clear water regulating valve is arranged at the front end of the second densimeter.

4. The multi-path heavy medium feeding device according to claim 1, wherein,

The number of the qualified medium feeding pumps is two, namely a first qualified medium feeding pump and a second qualified medium feeding pump;

The outlet of the first qualified medium feeding pump is connected with the first feeding pipeline, and the outlet of the second qualified medium feeding pump is connected with the second feeding pipeline.

5. The multi-channel heavy medium feeding device according to claim 4, wherein,

The connection position of the first qualified medium feeding pump and the qualified medium barrel is not higher than the connection position of the second qualified medium feeding pump and the qualified medium barrel.

6. The multi-path heavy medium feeding device according to claim 2, wherein,

A coal slime feeding funnel is arranged above the heavy medium cyclone;

The multipath heavy medium feeding device further comprises a third feeding pipeline, one end of the third feeding pipeline is connected with the qualified medium feeding pump, and the other end of the third feeding pipeline penetrates through the pre-rotation wetting pipe along a tangent line and enters the coal slime feeding hopper.

7. The multi-path heavy medium feeding device according to claim 6, wherein,

The third feeding pipeline is provided with a third flow regulating valve, a third densimeter, a third magnetic substance content meter, a third pressure transmitter and a second clear water regulating valve;

The second clear water regulating valve is arranged at the front end of the third densimeter.

8. The multi-path heavy medium feeding device according to claim 7, wherein,

The density of the dense medium suspension entering the coal slime feeding hopper through the third feeding pipeline is not greater than the density of the dense medium suspension entering the dense medium cyclone through the first feeding pipeline.

9. The multi-path heavy medium feeding device according to claim 1, wherein:

the upper part of the qualified medium barrel is of a cylindrical structure, the lower part of the qualified medium barrel is of a conical structure, and a high-pressure air blast device is arranged at the bottom of the qualified medium barrel.