CN112474042A - Internal-exhaust tail magnetic micro-fluidic classificator - Google Patents

Abstract

The invention provides an internal-row tail magnetic microfluidic concentrator, which comprises: the device comprises a feeding device, a sorting device, a tailing overflow device, a water supply device and a pulp separating cylinder; the feeding device is provided with an ore feeding groove; the sorting device is arranged below the feeding device and is communicated with an ore pulp outlet of the feeding device so as to discharge concentrate in the ore pulp out of the sorting device; the tailing overflow device is sleeved in the sorting device and used for discharging tailings formed by impurities in ore pulp falling from the sorting device out of the sorting device; the water supply device is arranged below the tailing overflow device and is used for flushing ore pulp falling in the separation device; the pulp separating cylinder is arranged in the sorting device and sleeved outside the tailing overflow device so as to prevent ore pulp from directly entering the tailing overflow device. According to the invention, the ore pulp is distributed into the sorting device through the ore feeding groove, the concentrate formed by the magnetic particles is discharged from the bottom of the sorting device, and the tailings are discharged through the overflow of the tailing overflow device in the sorting device, so that the occupied space of the equipment is saved.

Description

Internal-exhaust tail magnetic micro-fluidic classificator

Technical Field

The invention relates to the technical field of magnetic mineral separation, in particular to an internal-row tail magnetic micro-fluidic concentrator.

Background

At present, equipment used in magnetite concentration plants comprises a magnetic separator, a desliming tank, a magnetic separation column, an elutriation machine and the like, wherein the magnetic separator is a permanent magnetic product, the working principle is that magnetic materials are adsorbed out under the action of magnetic force, and separated concentrate is mostly accompanied with magnetic impurities to influence the concentrate grade. The desliming tank is permanent magnetism class product, uses now less, and the theory of operation utilizes material gravity, rising water buoyancy, magnetic field force combined action to select separately, nevertheless because of its magnetic field is single permanent magnetism fixed magnetic field, can't adjust magnetic field intensity to different operating modes, selects separately inefficiency, and the fluctuation of the material of selecting into influences the selection effect great. The magnetic separation column and the elutriation machine are electromagnetic products, ore pulp is fed into the middle upper part of the separation cylinder along the center of the separation cylinder through a feeder in the working process, and tailings overflow upwards from the top of the separation cylinder. The coils are sequentially and alternately electrified to form an intermittent pulsating magnetic field, magnetic particles are in an agglomeration, dispersion and agglomeration alternate state with the existence of the magnetic field, and non-magnetic gangue, slurry and the magnetic particles are separated under the action of gravity and buoyancy of rising water. Because the problems of inclusion and water consumption can not be well controlled in the separation process, and an external tailing discharging structure is adopted, the separation is not accurate enough, tail leakage is easy to generate when the grade of the concentrate is greatly improved, the occupied space is large, and the like.

Disclosure of Invention

In view of the above, the invention provides an internal-exhaust tail magnetic micro-fluidic concentrator, which aims to solve the problems that the tail running phenomenon is easy to generate in the working process of the existing magnetic separation equipment and the occupied area of the equipment is large.

The invention provides an internal-exhaust tail magnetic microfluidic concentrator, which comprises: the feeding device is provided with an ore feeding groove and is used for conveying ore pulp; the separation device is arranged below the feeding device and is communicated with the ore pulp outlet of the feeding device, and is used for separating magnetic particles in the ore pulp to form concentrate and discharging the concentrate; the tailing overflow device is sleeved in the sorting device and used for discharging tailings formed by impurities in ore pulp falling from the sorting device out of the sorting device; the pulp separating cylinder is arranged in the sorting device and sleeved outside the tailing overflow device to prevent ore pulp from directly entering the tailing overflow device; and the water supply device is arranged in the separation device and used for flushing the ore pulp falling in the separation device so as to flush out impurities in the ore pulp upwards and overflow into the tailing overflow device.

Furthermore, in the internal-row-tailing magnetic micro-fluidic sorting machine, two ends of the tailing overflow device are open, the outlet end of the tailing overflow device is connected with a tailing conveying pipe, and the tailing conveying pipe extends to the outside of the sorting device and is used for conveying tailings to the outside of the sorting device.

Furthermore, in the internal-row tail magnetic micro-fluidic sorter, the water supply device is of a cylindrical structure and is annularly arranged around the tailing conveying pipe by taking the tailing conveying pipe as an axis; and a plurality of water outlets are formed in the side wall of the water supply device and used for flushing the falling ore pulp.

Furthermore, in the internal-row tail magnetic micro-fluidic concentrator, a plurality of partition plates are arranged in the water supply device and used for dividing the water supply device into at least two water cavities; each water cavity is communicated with an external water source through a water conveying pipe, and a water outlet is formed in each water cavity.

Furthermore, in the internal-row tail magnetic micro-fluidic classificator, a partition plate is arranged in the water supply device to divide the water supply device into an upper water cavity and a lower water cavity; the bottom of the upper water cavity is communicated with a first water supply pipe, the side wall of the upper water cavity is circumferentially communicated with a plurality of water supply branch pipes, and each water supply branch pipe is provided with an upper water outlet; the bottom of the lower water cavity is communicated with a second water supply pipe, and a plurality of lower water outlets are formed in the circumferential direction of the side wall of the lower water cavity; the first water supply pipe sleeve is arranged on the outer wall of the tailing conveying pipe close to the bottom, and a first water supply channel is reserved between the first water supply pipe sleeve and the tailing conveying pipe and used for conveying an external water source into the water feeding cavity;

the second water supply pipe is sleeved on the outer wall of the first water supply pipe, and a second water supply channel is reserved between the second water supply pipe and the first water supply pipe and used for conveying an external water source into the water discharging cavity.

Further, in the internal-row tail magnetic microfluidic sorter, a cover body is arranged on the outer side wall of the sorting device, and a magnetic system is sleeved between the cover body and the outer side wall of the sorting device and used for providing a magnetic field environment for the interior of the sorting device; and a concentrate discharge valve is arranged at the bottom of the separation device and used for controlling the discharge amount of the concentrate.

Further, in the internal-row tail magnetic microfluidic concentration machine, the bottom of the separation device is a cone section, and a concentrate outlet is formed in the cone bottom end of the cone section; a first sensor is arranged at the upper part of the sorting device; the cone segment is provided with a second sensor.

Further, in the internal row tail magnetic micro-fluidic classificator, the bottom opening of the pulp separating cylinder is positioned below the inlet end of the tailing overflow device, so as to prevent ore pulp from directly entering the tailing overflow device.

Further, in the above-mentioned interior tail magnetic micro-fluidic concentrator, the feed device includes: a feeder and a feed chute; wherein, a feeding pipe is arranged on the feeder along the tangential direction, so that the ore pulp is fed into the feeder tangentially and flows downwards in a swirling manner; the ore feeding groove is arranged below the feeder and is communicated with the slurry outlet of the feeder.

Furthermore, in the internal-row tail magnetic micro-fluidic sorting machine, the feeding groove is provided with a grate for preventing large foreign matters in the ore pulp from entering the sorting device.

Further, in the above-mentioned interior tail magnetic micro-fluidic concentrator, the feeder device still includes: a feeding overflow unit; the feeding overflow unit is internally provided with a feeding overflow cylinder, and the feeding overflow cylinder is arranged right below a pulp outlet of the feeder; and an umbrella-shaped distribution plate is arranged on the outer wall of the feeding overflow cylinder in a circumferential ring mode and used for enabling ore pulp overflowing from the feeding overflow cylinder to be dispersed into the feeding groove.

According to the invention, the ore pulp is conveyed to the ore feeding groove through the feeding device, and is distributed to the sorting device through the ore feeding groove, so that the ore is indirectly fed, the ore feeding is more stable, and uneven feeding can be effectively prevented; concentrate formed by magnetic particles is discharged from the bottom of the sorting device, tailings are discharged through overflow in a tailing overflow device in the sorting device, and compared with the prior art in which an overflow tail discharge groove is arranged at the top of the sorting device, the equipment occupied space is saved; and the problems of easy tail running, large occupied space, unstable operation and the like when the concentrate grade is greatly improved are also solved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of an inner row tail magnetic microfluidic concentrator provided by an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, the internal row tail magnetic microfluidic concentrator of the embodiment of the invention comprises: the device comprises a feeding device 1, a sorting device 2, a tailing overflow device 3, a water supply device 4 and a pulp separating cylinder 5; wherein, the feeding device 1 is provided with an ore feeding groove 12 for conveying ore pulp; the sorting device 2 is arranged below the feeding device 1 and is communicated with an ore pulp outlet of the feeding device 1, and is used for sorting magnetic particles in ore pulp to form concentrate and discharging the concentrate; the tailing overflow device 3 is sleeved in the sorting device 2 and used for discharging tailings formed by impurities in ore pulp falling from the sorting device 2 out of the sorting device 2; the water supply device 4 is arranged below the tailing overflow device 3 and is used for flushing the ore pulp falling in the sorting device 2 so as to flush impurities in the ore pulp upwards and overflow into the tailing overflow device 3; the pulp separating cylinder 5 is arranged in the sorting device and sleeved outside the tailing overflow device to prevent ore pulp from directly entering the tailing overflow device.

In particular, the feed chute 12 in the feeder 1 may be of a straight cylindrical structure, and an opening may be provided at the top of the feed chute 12 to convey the slurry into the lower sorting device 2. The sorting device 2 may also be a cylindrical structure, which is disposed below the ore feeding groove 12 and coaxial with the ore feeding groove 12, a cover body 20 is disposed on the outer side wall of the sorting device 2, and a magnetic system 21 is sleeved between the cover body 20 and the outer side wall of the sorting device 2, and is used for providing a magnetic field environment for the interior of the sorting device 2 to sort out magnetic particles; the bottom of the sorting device 2 is provided with a concentrate discharge valve 22 for controlling the amount of concentrate discharged. In practice, the magnetic field intensity generated or induced by the magnetic system 21 can be adjusted to change the magnetic field intensity, so as to adjust the separation precision and the separation state of the ore pulp.

The tailings overflow arrangement 3 is arranged inside the sorting device 2 along the central axis of the sorting device 2. The water feed 4 is located inside the sorting device 2 and below the tailings overflow device 3.

A pulp separating cylinder 5 with an opening at the bottom is sleeved between the sorting device 2 and the tailing overflow device 3, and the opening at the bottom of the pulp separating cylinder 5 is positioned below the inlet end of the tailing overflow device 3 to prevent ore pulp from directly entering the tailing overflow device 3.

Further, the pulp separating cylinder 5 can be coaxially sleeved inside the sorting device 2 and is located below the ore feeding groove 12, pulp flow channels are respectively formed between the pulp separating cylinder 5 and the sorting device 2 and between the pulp separating cylinder 5 and the tailing overflow device 3, and dotted arrows in the figure represent the overflow direction of the pulp. The bottom opening end of the pulp separating cylinder 5 can be flared or can be an upper straight cylinder and a lower straight cylinder with equal diameters.

Preferably, the bottom of the sorting device 2 is a cone section, and a concentrate outlet is arranged at the cone bottom end of the cone section; the upper part of the sorting device 2 is provided with a first sensor 6 for detecting parameters such as concentration, density, grade or pressure of ore pulp; the cone section is provided with a second sensor 7 for detecting parameters like concentration, density, grade or pressure of the concentrate.

The detection position of the first sensor 6 is arranged at the lower part of the pulp separating cylinder 5, so that the related parameters of the ore pulp entering the flow channel between the pulp separating cylinder 5 and the tailing overflow device 3 can be accurately detected.

The first sensor 6 and the second sensor 7 feed back the acquired parameters to the control system, and the control system adjusts the size of the concentrate discharge valve 22 and/or the water supply quantity of the water supply device 4 according to the received parameters, and/or adjusts the size of the magnetic field generated or induced by the magnetic system 21 so as to automatically adjust the separation parameters such as the grade, the concentration and the like of the concentrate and/or the tailings, thereby ensuring the stable operation of the equipment. For example, when the feeding state fluctuates, the concentration of the ore pulp detected by the first sensor 6 is high, which indicates that the grade of the tailings is high and the tailings are likely to run, and the phenomenon can be avoided by increasing the magnetic field intensity or reducing the water supply quantity of the water supply device 4 or increasing the opening degree of the concentrate discharge valve 22; when the concentrate concentration detected by the second sensor 7 is higher, the opening of the concentrate discharge valve 22 can be increased, and vice versa, the opening of the concentrate discharge valve 22 is decreased.

The invention can be seen in that the invention is combined with the program automatic control in the control cabinet, can achieve the effects of accurate separation, large upgrading grade amplitude, stable operation, difficult tail running and water saving.

In this embodiment, the first sensor 6 may be a concentration sensor, a grade sensor, a pressure sensor, or a density sensor; the second sensor 7 may be a concentration sensor, a grade sensor, a pressure sensor or a density sensor, and the first sensor 6 and the second sensor 7 may be the same sensor or different sensors.

The internal-row tail magnetic microfluidic concentration machine in the embodiment of the invention is magnetic metal ore dressing equipment, is mainly used for desilting and wet-type fine magnetic separation operation, and can be used for desilting and desilting minerals, improving the grade of the minerals or ensuring the rough selection granularity on the premise of ensuring a certain grade.

As is apparent from the above description, the internal-row tail magnetic micro-fluidic concentrator provided in this embodiment delivers the slurry to the feeding chute 12 through the feeding device 1, and distributes the slurry to the periphery of the sorting device 2 through the feeding chute 12; the concentrate that forms the magnetic particle is discharged through sorting unit 2 bottom, overflows the tailing through among the tailing overflow arrangement 3 of sorting unit 2 inside and discharges, and the overflow is more even stable, can effectively prevent the phenomenon of a large amount of tail runners of overflow tailing, and with set up overflow row tail groove at sorting unit 2 top among the prior art, saved equipment occupation of land space.

With continued reference to fig. 1, the feed device 1 comprises: a feeder 11 and a feed chute 12; the feeder 11 is tangentially provided with an ore feeding pipe 13 for enabling ore pulp to enter the feeder 11 tangentially and to flow downwards in a swirling manner, so that the flow of the ore pulp flowing out of an opening at the bottom of the feeder 11 is distributed more uniformly and stably along the circumference, and overflow tailings can be effectively prevented from running out due to uneven distribution; the ore feeding groove 12 is arranged below the feeder 11 and is communicated with a pulp outlet at the lower part of the feeder 11, and a grate 121 is arranged in the ore feeding groove 12 and is used for preventing large foreign matters in the ore pulp from entering the sorting device 2, so that the blockage in the sorting device 2 or the outlet at the bottom of the sorting device can be effectively avoided.

Specifically, the feeder 11 may have a funnel-like structure or a straight-tube structure. The slurry enters the feeder 11 through the feeder pipe 13 on the side wall of the feeder 11, and the bottom of the feeder 11 is open and is directly communicated with the top of the feeding chute 12. In this embodiment, the outlet section of the feeder 11 extends to the interior of the feed chute 12.

The feed chute 12 may have a straight-tube structure or a tapered-tube structure. The grate 121 arranged at the bottom of the ore feeding groove 12 can be in an annular plate-shaped structure, and the outer peripheral wall of the grate 121 is connected with the inner wall of the sorting device 2. The shape and size of the mesh of the grate can be determined according to the actual situation, and the embodiment does not limit the shape and size of the mesh.

Further, in order to evenly convey the ore pulp to the lower sorting device 2 along the periphery of the sorting device 2, the feeding device 1 further comprises: a feeding overflow unit 14; wherein, a feeding overflow cylinder 141 is arranged in the feeding overflow unit 14, and the feeding overflow cylinder 141 is arranged right below the slurry outlet of the feeder 11; an umbrella-shaped distribution plate 142 is circumferentially and annularly arranged on the outer wall of the feeding overflow cylinder 141, so that ore pulp overflowing from the feeding overflow cylinder 141 is dispersed to the periphery of the feeding groove 12. The grate 121 arranged at the bottom of the feeding chute 12 can be flush with the bottom plate of the feeding overflow cylinder 141 or lower than the bottom plate of the feeding overflow cylinder 141.

Specifically, the feeding overflow unit 14 may include: the feeding overflow cylinder 141 and the umbrella-shaped distribution plate 142 are circumferentially arranged along the circumferential direction of the side wall of the feeding overflow cylinder 141; the included angle between the side wall of the umbrella-shaped distribution plate 142 and the bottom of the ore feeding groove 12 can be determined according to actual conditions. The top of the feeding overflow cylinder 141 and the outlet section of the feeder 11 have a preset height difference to provide an overflow gap for the slurry. The ore pulp falls into the ore feeding overflow cylinder 141 along the rotation of the feeder 11, and the ore pulp falls into the center of the ore feeding overflow cylinder 141, so that the amount distribution of the ore pulp around the overflow weir of the ore pulp is more uniform when the ore pulp overflows in the ore feeding overflow cylinder 141, and finally, the ore pulp entering the separation device 2 is more uniform along the periphery. The ore feeding groove 12 feeds the ore pulp into the periphery of the sorting device 2, and the side wall of the sorting device 2 is provided with the magnetic system 21, so that the magnetic field intensity of the area of the sorting device 2 close to the side wall is high, the ore pulp is fed into the periphery of the sorting device 2, the agglomeration and sedimentation of magnetic particles are facilitated, and the tailing is not easy to run.

In the above embodiments, the two ends of the tailing overflow device 3 are open, the outlet end of the tailing overflow device 3 is connected with the tailing conveying pipe 31, and the tailing conveying pipe 31 extends to the outside of the sorting device 2 to convey the tailing to the outside of the sorting device 2.

Specifically, the tailing overflow device 3 is in a straight cylinder or funnel-shaped structure. The tailings overflow apparatus 3 may be coaxially arranged inside the pulp separating cylinder 5. The outlet end of the tailing conveying pipe 31 extends to the outside of the sorting device 2, and the outlet end of the tailing conveying pipe 31 is connected with a tailing discharge valve 32 for regulating and controlling the amount of the discharged tailings; of course, the outlet end of the tailing conveying pipe 31 can be provided with a flow meter to detect the amount of tailings.

Tailing overflow arrangement 3, sorting unit 2, water supply installation 4, feeder 1 mutually support with lateral wall suit's magnetism system 21 etc. finally cooperate the accurate control in magnetic field, have solved the control concentrate that can not be fine and have mingled with, and the water consumption is big, selects separately not accurate enough, easily produces when improving the concentrate grade by a wide margin and runs the tail, takes up an area of the big and operation unstability scheduling problem.

In the above embodiments, the water supply device 4 is a cylindrical structure, and the tailings conveying pipe 31 is used as an axis and is circumferentially sleeved around the tailings conveying pipe 31; and a plurality of water outlets are formed in the side wall of the water supply device 4 and used for flushing the falling ore pulp.

Specifically, the water supply device 4 may have a straight tube shape, or may have a structure in which the upper portion is a tapered tube shape (one end having a smaller diameter faces upward, and the other end having a larger diameter faces downward) and the lower portion is a straight tube shape, and the end having a larger diameter of the tapered tube shape communicates with the straight tube shape. The side wall of the water supply device 4 is provided with water outlets at different positions, and each water outlet can be arranged along the tangential direction of the side wall of the water supply device 4 and can also be arranged vertical to the side wall of the water supply device 4 so as to provide upward water flow for ore pulp in different areas in the separation device 2.

Furthermore, a plurality of partition plates are arranged in the water supply device 4 and used for dividing the water supply device 4 into at least two water cavities; each water cavity is communicated with an external water source through a water conveying pipe, and a water outlet is formed in each water cavity.

Particularly, the water supply device 4 is divided into a plurality of water cavities, water is supplied independently, separation water supply is more accurate, upward water flow can be provided for ore pulp in each area of the separation device 2, and the grade of the ore concentrate is further improved.

In this embodiment, it is preferable that a partition 43 is disposed in the water supply device 4 to divide the water supply device 4 into an upper water chamber 41 and a lower water chamber 42; the bottom of the upper water cavity 41 is communicated with a first water supply pipe 412, the side wall of the upper water cavity 41 is circumferentially communicated with a plurality of water supply branch pipes 411, and each water supply branch pipe 411 is provided with an upper water outlet 4111. The water supply branch pipes 411 are uniformly distributed along the circumferential direction of the outer wall of the water feeding cavity 41, one end of each water supply branch pipe 411 is communicated with the water feeding cavity 41, the other end of each water supply branch pipe 411 is closed and is connected with the inner wall of the sorting device 2, and the other end of each water supply branch pipe 411 does not need to be connected with the sorting device 2. The shape of the last delivery port 4111 of seting up on each water supply branch pipe 411 can be round hole, bar hole etc. according to specific design, and its quantity can be confirmed according to actual conditions, and a plurality of delivery ports 4111 on can distributing in the circumference of every water supply branch pipe 411 to with the even blowout water supply branch pipe 411 of rivers.

The bottom of the lower water cavity 42 is communicated with a second water supply pipe 421, and a plurality of lower water outlets 422 are circumferentially arranged on the side wall of the lower water cavity 42; more specifically, a plurality of holes may be uniformly distributed on the side wall of the lower water cavity 42, and the shape of the holes may be circular holes or strip-shaped holes according to a specific design.

The first water supply pipe 412 is sleeved on the outer wall of the tailing conveying pipe 31 close to the bottom, and a first water supply channel is reserved between the first water supply pipe and the tailing conveying pipe for conveying an external water source to the upper water cavity 41; a first water feed valve 413 is arranged at the inlet end of the first water feed pipe 412 to control the amount of water entering the upper water chamber 41; the second water supply pipe 421 is sleeved on the outer wall of the first water supply pipe 412, a second water supply channel is reserved between the first water supply pipe and the second water supply pipe for conveying an external water source to the lower water cavity 42, and a second water supply valve 423 is arranged at the inlet end of the second water supply pipe 421 to control the amount of water entering the lower water cavity 42. That is, the tailings conveying pipe 31, the first feed pipe 412, and the second feed pipe 421 may be separated from each other in a pipe-to-pipe nested structure. In this embodiment, the first water supply pipe 412 may be formed by communicating a first main pipe 4121 and a first branch pipe 4122, the first main pipe 4121 is coaxially disposed with the tailings conveying pipe 31, and the first branch pipe 4122 is communicated with the first main pipe 4121; the second water supply pipe 421 is formed by communicating a second main pipe 4211 and a second branch pipe 4212; the second main pipe 4211 is arranged coaxially 31 with the tailings conveying pipe, and the second branch pipe 4212 is communicated with the second main pipe 4211.

Further, the first main pipe 4121, the second main pipe 4211 and the tailing conveying pipe 31 may be in a non-nested structure.

The working process of the internal-row tail magnetic microfluidic concentrator is as follows: the ore pulp is tangentially fed into the feeder 11 through the tangentially arranged feeding pipe 13 and rotatably turned in the feeder 11 to downwards enter the feeding overflow cylinder 141 in the feeding groove 12, the ore pulp overflows to the periphery through the feeding overflow cylinder 141, the ore pulp is uniformly fed to the upper part of the sorting device 2 close to the side wall of the sorting device in a circumferential mode, different forms of water can be provided for different areas in the sorting device 2 through water outlets at different positions of the water supply device 4, so that impurities in the ore pulp are upwards flushed out, and the upwards flushed tailings are collected and discharged through the tailing overflow device 3; the concentrate finally enters the conical section at the bottom of the sorting device 2 and is finally discharged out of the sorting device 2 through the concentrate discharge valve 22; in the separation process, the related parameters of ore pulp entering a flow channel between the pulp separating cylinder 5 and the tailing overflow device 3 and the related parameters of ore concentrate collected at the bottom of the separation device 2 are respectively obtained in real time through the first sensor 6 and the second sensor 7, so that the water supply quantity of the water supply device 4, the magnetic field intensity, the opening degree of the ore concentrate discharge valve 22 and the tailing discharge valve 32 are controlled through the control system to realize the separation state of the adjusting device and the accurate separation, the ore concentrate grade improving range is increased, the operation stability of the device is improved, and the probability of tailing running is reduced.

In conclusion, according to the internal-row tail magnetic micro-fluidic concentrator provided by the invention, the ore pulp is conveyed into the ore feeding groove 12 in a rotating mode through the feeder 11 of the feeding device, and the ore pulp is distributed into the sorting device 2 along the periphery of the sorting device 2 through the ore feeding groove 12, so that the ore feeding is more stable. The overflow distribution can effectively prevent uneven feeding after the rotary feeding; and (3) discharging concentrate formed by the magnetic particles through the bottom of the sorting device 2, and discharging tailings through the overflow device 3 inside the sorting device 2. Compared with the prior art that the overflow tail discharge groove is arranged at the top of the sorting device 2, the built-in tailing overflow device 3 saves the occupied space of equipment; and the problems of easy generation of tailing running, unstable operation and the like when the concentrate grade is greatly improved and the ore feeding is fluctuated are also solved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (11)

1. An internal-row tail magnetic microfluidic concentrator is characterized by comprising:

a feeding device (1) in which a feed chute (12) is arranged for conveying pulp;

the sorting device (2) is arranged below the feeding device (1) and is communicated with a pulp outlet of the feeding device (1) so as to sort out magnetic particles in pulp to form concentrate and discharge the concentrate; the tailing overflow device (3) is sleeved in the sorting device (2) and is used for discharging tailings formed by impurities in ore pulp falling from the sorting device (2) out of the sorting device (2);

the pulp separating cylinder (5) is arranged in the sorting device (2) and sleeved outside the tailing overflow device (3) to prevent ore pulp from directly entering the tailing overflow device (3);

a water supply device (4) arranged in the separation device (2) and used for flushing the ore pulp falling in the separation device (2) so as to flush out impurities in the ore pulp upwards and overflow into the tailing overflow device (3).

2. The internal-row tail magnetic microfluidic concentrator according to claim 1, wherein the tail overflow device (3) is open at two ends, a tail conveying pipe (31) is connected to an outlet end of the tail overflow device (3), and the tail conveying pipe (31) extends to the outside of the sorting device (2) to convey the tail to the outside of the sorting device (2).

3. The internal-row tail magnetic micro-fluidic concentrator is characterized in that the water supply device (4) is of a cylindrical structure and is annularly arranged around the tailing conveying pipe (31) by taking the tailing conveying pipe (31) as an axis; and a plurality of water outlets are formed in the side wall of the water supply device (4) and used for flushing the falling ore pulp.

4. The internal-row tail magnetic micro-fluidic concentrator according to claim 1 or 3, wherein a plurality of partition plates (43) are arranged in the water supply device (4) to divide the water supply device (4) into at least two water cavities; each water cavity is communicated with an external water source through a water conveying pipe, and a water outlet is formed in each water cavity.

5. The internal-row tail magnetic micro-fluidic concentrator according to claim 4, wherein a partition plate (43) is arranged in the water supply device (4) to divide the water supply device (4) into an upper water cavity (41) and a lower water cavity (42);

the bottom of the upper water cavity (41) is communicated with a first water supply pipe (412), the side wall of the upper water cavity (41) is circumferentially communicated with a plurality of water supply branch pipes (411), and each water supply branch pipe (411) is provided with an upper water outlet (4111);

the bottom of the lower water cavity (42) is communicated with a second water supply pipe (421), and a plurality of lower water outlets are formed in the circumferential direction of the side wall of the lower water cavity (42).

6. The internal-row tail magnetic microfluidic concentrator according to claim 5, wherein the first water supply pipe (412) is sleeved on the outer wall of the tailing conveying pipe (31) close to the bottom, and a first water supply channel is reserved between the first water supply pipe and the tailing conveying pipe for conveying an external water source into the upper water cavity (41);

the second water supply pipe (421) is sleeved on the outer wall of the first water supply pipe (412), and a second water supply channel is reserved between the second water supply pipe and the first water supply pipe and used for conveying an external water source into the water discharge cavity (42).

7. The internal row tail magnetofluidic concentrator of claim 1, wherein the bottom of the sorting device (2) is a cone section, the upper part of the sorting device (2) is provided with a first sensor (6), and the cone section is provided with a second sensor (7); a cover body (20) is arranged on the outer side wall of the sorting device (2), and a magnetic system (21) is sleeved between the cover body (20) and the outer side wall of the sorting device (2) and used for providing a magnetic field environment for the interior of the sorting device (2); and a concentrate discharge valve (22) is arranged at the bottom of the sorting device (2) and used for controlling the discharge amount of the concentrate.

8. An internal row tail magnetic microfluidic concentrator according to claim 1, wherein the bottom opening of the pulp separating cylinder (5) is located below the inlet end of the tailings overflow device (3) to prevent slurry from directly entering the tailings overflow device (3).

9. Internal row tail magnetofluidic concentrator according to claim 1, characterized in that the feeding device (1) comprises: a feeder (11) and a feeding chute (12); wherein,

the feeder (11) is tangentially provided with an ore feeding pipe for tangentially feeding ore pulp into the feeder (11) and enabling the ore pulp to swirl and descend in the feeder (11);

the ore feeding groove (12) is arranged below the feeder (11) and is communicated with a pulp outlet of the feeder (11).

10. An internal row tail magnetofiuidic concentrator according to claim 9, wherein a grate (121) is provided in the feed chute (12) to prevent large pieces of foreign matter in the slurry from entering the separator (2).

11. The internal row tail magnetofluidic concentrator of claim 9, wherein the feed device (1) further comprises: a feeding overflow unit (14); wherein,

a feeding overflow cylinder (141) is arranged in the feeding overflow unit (14), and the feeding overflow cylinder (141) is arranged right below a pulp outlet of the feeder (11);

an umbrella-shaped distribution plate (142) is arranged on the outer wall of the ore feeding overflow cylinder (141) in a circumferential direction in a surrounding mode and used for enabling ore pulp overflowing from the ore feeding overflow cylinder (141) to be dispersed into the ore feeding groove (12).

Images