Ultrasonic centrifugal magnetic separation column for strengthening fine-fraction mineral recovery

Abstract

The invention relates to an ultrasonic centrifugal magnetic separation column for strengthening fine-fraction mineral recovery. The ultrasonic centrifugal magnetic separation column comprises a separation cylinder (19); the hollow column body (4) is arranged in the separation cylinder (19) in a penetrating mode, the lower portion of the hollow column body (4) is a double-layer pipe, a concentrate opening is formed in the sealed end of the hollow column body (4), and a concentrate scraper (8) is arranged on the outer side of the hollow column body (4); the small end of the inverted-T-shaped central column (2) is arranged in the hollow column body (4) in a penetrating manner, and the large end of the inverted-T-shaped central column (2) and the hollow column body (4) are arranged at intervals; the fine grain concentrate discharging pipe (14) penetrates through the central column (2) and is connected with a concentrate opening; the coarse and fine grain periodic excitation coil (10) is arranged on the separation cylinder (19) and the hollow cylinder (4); and the elutriation water dividing pipe (15) ascends. According to the device, the stress difference between coarse-grain minerals and fine-grain minerals and between magnetic minerals and non-magnetic minerals in the separation process of the magnetic separation column is enhanced, and the loss of the fine-grain magnetic minerals in tailings is reduced. The problems that an existing magnetic separation column is high in tailing magnetic mineral content and small in concentrate grade improvement are solved, and the concentrate quality is improved.

Description

Technical Field

[0001] The invention relates to an ultrasonic centrifugal magnetic separation column for strengthening the recovery of fine-grained minerals, and belongs to the field of mineral processing engineering. Background Art

[0002] Magnetic separation is the main way to recover iron resources in iron ore. With the continuous depletion of high-quality domestic iron ore resources, blast furnace smelting has put forward higher requirements for the quality of iron concentrate. To improve the quality and reduce impurities of iron concentrate, it is necessary to continuously reduce the particle size of iron concentrate through fine grinding to achieve monomer dissociation, which increases the difficulty of sorting fine-grained minerals. Magnetic separation column is a commonly used sorting equipment in the process of improving the quality and reducing impurities of iron concentrate. In the process of industrial application, the recovery effect of fine-grained minerals is limited. First, the agglomeration of fine particles in the magnetic field and the adsorption on the surface of coarse particles are still relatively obvious, and the fine tailings are entrained into the concentrate, affecting the quality of the concentrate; second, under the impact of the rising water flow, the magnetic field around the column has a poor ability to capture fine-grained useful minerals distributed in the middle and center parts, and they are lost in the tailings with the overflow, reducing the recovery rate of useful minerals in the concentrate. This is a technical problem that is difficult to solve in the field of this equipment. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the magnetic mineral content of the existing magnetic separation column tailings is relatively high, and the improvement range of the concentrate grade is small.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an ultrasonic centrifugal magnetic separation column for strengthening the recovery of fine-grained minerals, comprising:

[0005] A sorting drum, wherein an overflow discharge chute is provided at the top of the sorting drum, and a coarse concentrate discharge pipe is provided at the bottom;

[0006] A hollow cylinder, which is inserted into the separation barrel and connected to a feed pipe at the upper end. The lower part of the hollow cylinder is a double-layer tube structure, and a concentrate port is provided at the sealing end, which is inclined toward the concentrate port. A concentrate scraper is rotatably provided on the outer side of the hollow cylinder.

[0007] A central column, wherein the central column is an inverted T-shaped structure, and the small end is inserted into the hollow cylinder, the large end of the central column is spaced apart from the lower end of the hollow cylinder, and the sealing end of the hollow cylinder is symmetrically provided with a spiral connection part, the lower end of the connection part is connected to the central column, a drug delivery tube is inserted into the interior of the central column, and a drug disperser connected to the drug delivery tube is provided at the lower part;

[0008] A fine-grained concentrate discharge pipe, one end of which passes through the central column and the connecting part and is connected to the concentrate port, and the other end extends out of the separation cylinder;

[0009] A coarse-fine particle periodic excitation coil, wherein the coarse-fine particle periodic excitation coil is arranged on the inner wall of the separation drum and the outer wall of the hollow cylinder, and a concentrate scraper is arranged outside the coarse-fine particle periodic excitation coil on the outer wall of the hollow cylinder;

[0010] The ascending washing water diversion pipe is arranged at the lower end of the central column, and a plurality of water outlets with outlets arranged upward are arranged on the pipe wall.

[0011] Among them, the above-mentioned device also includes a centrifugal guide plate, which is a spiral sheet structure and is arranged in the gap between the lower end of the hollow cylinder and the large end of the central column. The upper end of the centrifugal guide plate is in contact and connected with the lower end of the hollow cylinder, and the lower end is connected to the central column.

[0012] Among them, the above-mentioned device also includes a driving member and a transmission ring. The transmission ring is mounted on the upper end of the hollow cylinder. The driving member can drive the transmission to rotate around the axis of the hollow cylinder. The concentrate scraper is arranged in a ring shape at intervals, and the upper end is vertically connected to the lower end of the transmission ring.

[0013] Furthermore, the concentrate scraper in the above device is a spiral structure and is sleeved on the outside of the hollow cylinder.

[0014] Furthermore, the driving member in the above device includes a motor and a guide wheel, the guide wheel is arranged in a ring shape at intervals at the upper end of the hollow cylinder, the lower end of the transmission ring is placed on the guide wheel, the output end of the motor is connected to the transmission ring and can drive the transmission to rotate around the axis of the hollow cylinder.

[0015] Wherein, ultrasonic generators are arranged on the inner wall of the hollow column and the outer wall of the central column in the above device.

[0016] Among them, the upper end of the hollow cylinder in the above device is provided with brackets at intervals on the circumference, and the hollow cylinder is connected to the upper end of the sorting barrel through the brackets. The outer wall of the central column is provided with connecting bridges at intervals, and the outer end of the connecting bridge is connected to the inner wall of the hollow cylinder.

[0017] Wherein, the overflow discharge chute in the above device is provided with an overflow port, and a tailings pipe is provided at the overflow port.

[0018] The ascending washed water separation pipe in the above device is a plurality of connected groups of concentric annular pipes, one end of which is connected to a water supply pipe, and the other end of the water supply pipe extends out of a sorting barrel.

[0019] Wherein, high-frequency demagnetizers are arranged on the outer sides of the coarse-grained concentrate discharge pipe and the fine-grained concentrate discharge pipe in the above-mentioned device.

[0020] The beneficial effects of the present invention are as follows: compared with the traditional magnetic separation column, the minerals entering the device are initially dispersed under the ultrasonic action of high-frequency ultrasound and then interact with the dispersant, which strengthens the dispersion behavior between coarse and fine-grained minerals, greatly reduces the agglomeration and adsorption of minerals, and creates favorable conditions for subsequent magnetic separation; before the minerals are fed into the separation zone, they are guided by the centrifugal guide plate in the centrifugal guide zone, so that centrifugal forces corresponding to the physical properties of the mineral particles of coarse and fine particle sizes and different specific gravities are generated, and the final combined forces of different magnitudes and directions are formed under the combined action of the rising water flow, centrifugal force, magnetic force, and gravity, and the minerals move along different trajectories under the action of the combined forces, thereby realizing the efficient separation of coarse and fine-grained minerals, and magnetic and non-magnetic minerals; by setting a fine-grained magnetic mineral capture magnetic field in the central column, the fine-grained magnetic minerals in the ore pulp are recovered in an enhanced manner, and the loss of useful magnetic minerals in the tailings is reduced. This device enhances the dispersion of various minerals in the ore pulp, increases the force difference between coarse-grained and fine-grained minerals, and magnetic and non-magnetic minerals during the separation process of the magnetic column, reduces the loss of fine-grained magnetic minerals in the tailings, and solves the problems of high magnetic mineral content in the magnetic column tailings and small improvement in concentrate grade. At the same time, it also increases the types of concentrate products, greatly improving the recovery rate of useful resources and the quality of concentrates in the separation process.

[0021] This device can be widely used in major universities, research institutes, and related industrial manufacturers. It can effectively alleviate some common problems of existing magnetic separation columns, increase the types of concentrate products of magnetic separation columns, and improve the recovery rate of useful resources and the quality of concentrates in the separation process. It has good prospects for mass production and promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the AA section structure;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the middle BB section;

[0025] Figure 4 For the present invention Figure 1 Schematic diagram of the CC cross-section structure;

[0026] Figure 5 For the present invention Figure 1 Schematic diagram of the structure of the middle DD section;

[0027] Figure 6 For the present invention Figure 1 Schematic diagram of the EE cross-section structure;

[0028] Figure 7 For the present invention Figure 1 Schematic diagram of the FF cross-section structure;

[0029] Figure 8 This is the arrangement diagram of the coarse-grained periodic excitation coil and the annular fine-grained concentrate scraper of the present invention;

[0030] Fig. 9 It is a schematic diagram of the hollow main body structure of the present invention;

[0031] Fig.10 For the present invention Fig. 9 Left view structural diagram.

[0032] Marked in the figure are: 1 is the feed pipe, 2 is the center column, 3 is the dosing pipe, 4 is the hollow cylinder, 41 is the connecting part, 5 is the ultrasonic generator, 6 is the overflow discharge chute, 7 is the overflow port, 8 is the concentrate scraper, 9 is the tailings pipe, 10 is the coarse and fine particle periodic excitation coil, 11 is the fine particle concentrate diversion port, 12 is the reagent disperser, 13 is the centrifugal diversion outlet, 14 is the fine particle concentrate discharge pipe, 15 is the rising washing water separation pipe, 16 is the water supply pipe, 17 is the coarse particle concentrate discharge pipe, 18 is the high frequency demagnetizer, 19 is the sorting drum, 20 is the guide wheel, 21 is the transmission ring, 22 is the motor, 23 is the centrifugal guide plate, 24 is the electrical control cabinet, and 25 is the bracket. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings.

[0034] like Figures 1 to 10 As shown, an ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals of the present invention comprises:

[0035] A separation drum 19, wherein an overflow discharge chute 6 is provided at the top of the separation drum 19, and a coarse concentrate discharge pipe 17 is provided at the bottom;

[0036] A hollow cylinder 4, which is inserted into the separation barrel 19 and connected to the feed pipe 1 at the upper end. The lower part of the hollow cylinder 4 is a double-layer tube structure, and a concentrate port is provided at the sealing end, and the sealing end is inclined toward the concentrate port. A concentrate scraper 8 is rotatably provided on the outer side of the hollow cylinder 4;

[0037] A central column 2, wherein the central column 2 is an inverted T-shaped structure, and the small end is inserted into the hollow cylinder 4, the large end of the central column 2 is spaced apart from the lower end of the hollow cylinder 4, and the sealing end of the hollow cylinder 4 is symmetrically provided with a spiral connection part 41, the lower end of the connection part 41 is connected to the central column 2, the central column 2 is provided with a drug delivery tube 3, and the lower part is provided with a drug disperser 12 connected to the drug delivery tube 3;

[0038] A fine concentrate discharge pipe 14, one end of which passes through the central column 2 and the connecting portion 41 and is connected to the concentrate port, and the other end of which extends out of the separation cylinder 19;

[0039] A coarse-fine particle periodic excitation coil 10, wherein the coarse-fine particle periodic excitation coil 10 is arranged on the inner wall of the separation drum 19 and the outer wall of the hollow cylinder 4, and the concentrate scraper 8 is arranged outside the coarse-fine particle periodic excitation coil 10 on the outer wall of the hollow cylinder 4;

[0040] The rising elutriation water separation pipe 15 is arranged at the lower end of the central column 2, and a plurality of outlets with outlets arranged upward are arranged on the pipe wall. It can be understood by those skilled in the art that the device is composed of a magnetic separation column body and an electrical control cabinet 24. Since the electrical control cabinet 24 is a prior art, it is actually connected to the corresponding electrical control components of the magnetic separation column body through a wire to control the operation of the device. The device is functionally divided into a diversion area I, an ultrasonic dispersion area II, a diversion area III, a reagent action area IV, a diversion area V, a centrifugal diversion area VI, a fine-grained concentrate collection area VII, a sorting area VIII, a coarse-grained concentrate collection area IX, and a tailings overflow area X. The sorting cylinder 19 mainly provides a place of action, and is actually a cylindrical structure with a conical lower part. The top of the sorting cylinder 19 is provided with an overflow discharge trough 6, and the bottom is provided with a coarse-grained concentrate discharge pipe 17. The hollow column 4 is a hollow tubular structure and the upper end is connected to the feed pipe 1, while the lower part of the hollow column 4 is a double-layer tube structure, and the lower end is sealed, and the annular gap formed between the tube walls is the fine-grained concentrate diversion port 11, and the sealed end is provided with a concentrate port, and the sealed end is inclined toward the concentrate port. The center of the hollow part of the hollow column 4 is penetrated by a central column 2 with an inverted T-shaped structure, and the small end of the central column 2 is penetrated in the hollow column 4, and the large end of the central column 2 is spaced from the lower end of the hollow column 4 to form a centrifugal The diversion outlet 13, the center column 2 is provided with a dosing tube 3, and the center column 2 is preferably a hollow structure, and the hollow part is used as the dosing tube 3, and the middle part of the hollow column 4 is respectively the diversion area I, the ultrasonic dispersion area II, the diversion area III, the agent action area IV, the diversion area V, and the centrifugal diversion area VI from top to bottom. The center column 2 and the hollow column 4 are rigidly connected in the diversion area I, the diversion area III, and the diversion area V to ensure the stability of the center column 2 of the equipment, and the concentrate scraper 8 is arranged on the outside of the hollow column 4. The coarse and fine particle periodic excitation coils 10 are arranged at intervals, and the magnetic field is generated by periodic excitation in the order of "a→b→c→a→b→c" during operation. According to this arrangement, when the magnetic field changes, the fine particle concentrate scraper 8 can be used to make the fine particle concentrate move downward under the action of the magnetic force, so as to prevent the difficulty of unloading when the magnetic field changes. The concentrate scraper 8 rotates to scrape the slurry from top to bottom into the double-layer tube structure at the bottom of the hollow column 4 to form the fine concentrate diversion port 11, and then enters the concentrate port and is discharged from the fine concentrate discharge pipe 14 to be collected outside the separation cylinder 19. In practice, it is preferred that there are two concentrate ports and they are symmetrically arranged, and the fine concentrate discharge pipe 14 is a Y-shaped structure. At the same time, it is preferred that the sealing end of the hollow column 4 is symmetrically provided with a connection part 41, and the connection part 41 is a spiral structure, so that the lower end of the entire hollow column 4 is a drill-like structure and a through hole is provided in the middle for the central column 2 to penetrate, and one end of the fine concentrate discharge pipe 14 passes through the central column 2 and the connection part 41 and is connected to the concentrate port. The rising elution water separation pipe 15 is arranged at the lower end of the central column 2, and a plurality of outlets with outlets arranged upward are arranged on the pipe wall, and the rising elution water flow sprayed from the outlet is further dispersed and moves upward.

[0041] Preferably, the device further comprises a centrifugal guide plate 23, which is a spiral sheet structure and is arranged at intervals in the gap between the lower end of the hollow cylinder 4 and the large end of the central column 2. The upper end of the centrifugal guide plate 23 is in contact with and connected to the lower end of the hollow cylinder 4, and the lower end is connected to the central column 2. It can be understood by those skilled in the art that in order to further achieve uniform dispersion of the minerals in the sorting cylinder 19, the centrifugal guide plate 23 is arranged in the gap between the lower end of the hollow cylinder 4 and the large end of the central column 2, so that the minerals pass through the centrifugal guide area before being fed into the sorting area. Under the guidance of the centrifugal guide plate 23, the mineral particles of coarse and fine particle sizes and different specific gravities generate centrifugal forces corresponding to their physical properties, and under the combined action of the rising water flow, centrifugal force, magnetic force, and gravity, the final resultant forces of different magnitudes and directions are formed, and the minerals move along different trajectories under the action of the resultant forces, thereby achieving efficient separation of coarse and fine minerals, and magnetic and non-magnetic minerals. Therefore, it is preferred that the centrifugal guide plate 23 is a spiral sheet structure, and at the same time, the upper end of the centrifugal guide plate 23 is in contact and connected with the lower end of the hollow cylinder 4, and the lower end is connected to the central column 2, so that the entire centrifugal guide plate 23 is arranged in the shape of a roof hood in the gap between the lower end of the hollow cylinder 4 and the large end of the central column 2, and the dispersion of minerals is achieved through the centrifugal guide plate 23.

[0042] Preferably, the above device also includes a driving member and a transmission ring 21, the transmission ring 21 is sleeved on the upper end of the hollow cylinder 4, the driving member can drive the transmission ring 21 to rotate around the axis of the hollow cylinder 4, the concentrate scraper 8 is arranged in an annular interval, and the upper end is vertically connected to the lower end of the transmission ring 21. It can be understood by those skilled in the art that in order to facilitate the drive of the concentrate scraper 8 to rotate and scrape the ore. The present device is preferably provided with a driving member and a transmission ring 21, specifically the transmission ring 21 is sleeved on the upper end of the hollow cylinder 4, and the transmission ring 21 can rotate freely around the axis of the hollow cylinder 4, and the setting of the driving member can actually drive the transmission ring 21 to rotate around the axis of the hollow cylinder 4, because the concentrate scraper 8 is arranged in an annular interval, and the upper end is vertically connected to the lower end of the transmission ring 21, the actual rotation of the transmission ring 21 can drive the concentrate scraper 8 to rotate.

[0043] Preferably, the concentrate scraper 8 in the above device is a spiral structure and is sleeved on the outside of the hollow cylinder 4. Those skilled in the art can understand that the present device further preferably has a structure of the concentrate scraper 8, which quickly scrapes the concentrate adsorbed on the outer wall of the hollow cylinder 4 downward, and under the combined action of the periodically changing magnetic field, moves downward to the fine-grained concentrate guide port 11 and enters the concentrate port. In practice, the concentrate scraper 8 is preferably a spiral structure and is sleeved on the outside of the hollow cylinder 4, keeping the concentrate scraper 8 close to the outside of the hollow cylinder 4, and rotating the concentrate scraper 8 can scrape the concentrate along the gap between the concentrate scrapers 8 to the fine-grained concentrate guide port 11 and then enter the concentrate port.

[0044] Preferably, the driving member in the above device includes a motor 22 and a guide wheel 20, the guide wheel 20 is arranged at an annular interval at the upper end of the hollow cylinder 4, the lower end of the transmission ring 21 is placed on the guide wheel 20, and the output end of the motor 22 is connected to the transmission ring 21 and can drive the transmission ring 21 to rotate around the axis of the hollow cylinder 4. It can be understood by those skilled in the art that the present device further preferably has a specific structure of the driving member, including a motor 22 and a guide wheel 20, and the guide wheel 20 is arranged at an annular interval at the upper end of the hollow cylinder 4, and the lower end of the transmission ring 21 is placed on the guide wheel 20, so that the transmission ring 21 can rotate freely, and at the same time, a limiter can be provided so that the transmission ring 21 can only rotate, and cannot move radially or axially, and the output end of the motor 22 is connected to the transmission ring 21 and can drive the transmission ring 21 to rotate around the axis of the hollow cylinder 4. In practice, the transmission ring 21 is preferably an internal gear ring structure, a driving gear is provided at the output end of the motor 22, and the driving gear is meshed with the transmission ring 21, and the motor 22 is symmetrically arranged in two groups to achieve the positioning of the transmission ring 21.

[0045] Preferably, an ultrasonic generator 5 is provided on the inner wall of the hollow cylinder 4 and the outer wall of the central column 2 in the above device. It can be understood by those skilled in the art that, in order to ensure the dispersion of minerals, the present device is preferably provided with an ultrasonic generator 5 on the inner wall of the hollow cylinder 4 and the outer wall of the central column 2, so that the minerals are initially dispersed under the ultrasonic action of high-frequency ultrasound and then act with the dispersant, thereby strengthening the dispersion behavior between coarse and fine minerals, greatly reducing the agglomeration and adsorption of minerals, and creating favorable conditions for subsequent magnetic separation.

[0046] Preferably, in the above device, brackets 25 are arranged at intervals on the circumference of the upper end of the hollow cylinder 4, and the hollow cylinder 4 is connected to the upper end of the sorting barrel 19 through the brackets 25. The outer wall of the center column 2 is provided with connecting bridges at intervals, and the outer end of the connecting bridge is connected to the inner wall of the hollow cylinder 4. It can be understood by those skilled in the art that, in order to facilitate the fixation of the hollow cylinder 4 and the center column 2, the present device preferably has brackets 25 arranged at intervals on the circumference of the upper end of the hollow cylinder 4, and the hollow cylinder 4 is connected to the upper end of the sorting barrel 19 through the brackets 25. At the same time, connecting bridges are arranged at intervals on the outer wall of the center column 2, and the outer end of the connecting bridge is connected to the inner wall of the hollow cylinder 4. Specifically, the center column 2 and the hollow cylinder 4 are rigidly connected by connecting bridges in the diversion area I, the diversion area III, and the diversion area V to ensure the stability of the center column 2 of the equipment.

[0047] Preferably, the overflow discharge chute 6 in the above device is provided with an overflow port 7, and a tailings pipe 9 is provided at the overflow port 7. Those skilled in the art can understand that, in order to facilitate the discharge of tailings, an overflow port 7 is actually provided on the overflow discharge chute 6, and a tailings pipe 9 is provided at the overflow port 7. This structural arrangement enables the non-magnetic minerals in the slurry to be discharged into the overflow discharge chute 6 through the tailings overflow area X under the dual effects of the fast rising water flow and the small upward centrifugal force due to the non-magnetic minerals in the slurry being not affected by the magnetic force; the coarse and fine non-magnetic minerals entering the overflow discharge chute 6 enter the tailings pipe 9 through the overflow port 7 and are discharged from the magnetic separation column as tailings.

[0048] Preferably, the rising washing water separation pipe 15 in the above device is a plurality of connected concentric annular pipes, and one end is connected to a water supply pipe 16, and the other end of the water supply pipe 16 extends out of the sorting drum 19. It can be understood by those skilled in the art that, in order to achieve uniform rising of the minerals in the hollow cylinder 4, the rising washing water separation pipe 15 of the present device is preferably a plurality of concentric annular pipes, and water is uniformly supplied from the middle of the sorting drum 19 by the water supply pipe 16, and the fine-grained concentrate discharge pipe 14 passes through the gap of the rising washing water separation pipe 15 away from the concentrate outlet and passes through the bottom conical surface of the sorting drum 19, and the water supply pipe 16 passes through the bottom conical surface of the sorting drum 19.

[0049] Preferably, the coarse-grained concentrate discharge pipe 17 and the fine-grained concentrate discharge pipe 14 in the above device are both provided with a high-frequency demagnetizer 18 on the outside. Those skilled in the art will appreciate that the present device is also preferably provided with a high-frequency demagnetizer 18 on the outside of the coarse-grained concentrate discharge pipe 17 and the fine-grained concentrate discharge pipe 14, so that the coarse-grained concentrate discharge pipe 17 and the fine-grained concentrate discharge pipe 14 are demagnetized by the high-frequency demagnetizer 18 and discharged as concentrate.

[0050] Equipment workflow

[0051] Before the equipment is put into use, the ore feed pipe 1, the water supply pipe 16, the coarse-grained concentrate discharge pipe 17, the fine-grained concentrate discharge pipe 14, the tailings pipe 9 and the power supply are connected.By adjusting the magnetic field strength of the coarse and fine particle periodic excitation coil 10, the vibration frequency of the ultrasonic generator 5, the dosage of the reagent (dispersant, etc.), the water supply size, the feeding size of the ore feeding pipe 1, the opening size of the fine-grained concentrate discharge pipe 14, the opening size of the coarse-grained concentrate discharge pipe 17, the frequency of the high-frequency demagnetizer 18, the speed and direction of the motor 22, etc. through the electrical control cabinet 24, the raw ore to be magnetically separated is fed into the separation cylinder 19 through the ore feeding pipe 1, enters the ultrasonic dispersion zone II through the guide zone I, enters the reagent action zone IV through the guide zone III after ultrasonic dispersion by the ultrasonic generator 5, and the mineral dispersing reagent enters the reagent disperser 12 through the dosing pipe 3, and after dispersion, is fed into the reagent action zone IV to fully react with the mineral that has been ultrasonically dispersed, and then the mineral is guided. Zone V is pressurized to enter the centrifugal diversion zone VI. After being guided by the centrifugal guide plate 23 in the centrifugal diversion zone VI, the slurry flow passes through the centrifugal diversion outlet 13 and rotates slightly upward in the clockwise direction at a high speed into the separation zone VIII, and is further dispersed and moves upward in the separation zone VIII under the action of the rising washing water flow sprayed from the rising washing water separation pipe 15; the minerals with relatively coarse particle size and large specific gravity in the original ore are rapidly rotated to the vicinity of the inner wall of the separation drum 19 in the separation zone VIII under the action of the large centrifugal force, and the magnetic particles are attracted by the magnetic field force excited by the annular coarse-grained periodic excitation coil 10 set on the inner wall of the outer cylinder-19 in the section number CF section, and gradually move to the inner wall of the separation drum 19, and with the periodic change of magnetic force and gravity, the magnetic particles are gradually attracted to the inner wall of the separation drum 19. Under the combined action of the forces, the particles move downward into the coarse-grained concentrate collection area IX, and are discharged as coarse-grained concentrate after being demagnetized by the high-frequency demagnetizer 18 through the coarse-grained concentrate discharge pipe 17. The non-magnetic minerals in the slurry are not affected by the magnetic force, and are discharged into the overflow discharge chute 6 through the tailings overflow area X under the dual action of the rapid rising water flow and the upward centrifugal force; the minerals with relatively fine particle size and small specific gravity in the slurry are subjected to the action of the smaller centrifugal force in the separation area VIII, and move upward and slightly toward the center under the combined action of the rising water flow, the smaller upward centrifugal force and the inward squeezing of the outer coarse-grained minerals. The magnetic minerals in this part of the slurry are mainly adsorbed and gradually moved under the action of the stronger magnetic field force generated by the annular fine-grained periodic excitation coil 10 arranged on the outer wall of the hollow cylinder 4. The fine concentrate moves to the outer wall of the hollow cylinder 4, and is scraped downward by the magnetic force generated by the periodically changing magnetic field and the concentrate scraper 8, and under the combined action of the periodically changing magnetic field, moves downward to the fine concentrate diversion port 11 and enters the fine concentrate collection area Ⅶ, and is discharged from the separation drum 19 along the fine concentrate discharge pipe 14 arranged below the accumulation area, and is discharged as a fine concentrate after being demagnetized by the high-frequency demagnetizer 18 arranged at the lower end of the fine concentrate discharge pipe 14, while the non-magnetic minerals in the slurry are not affected by the magnetic force, and are discharged into the overflow discharge chute 6 through the tailings overflow area Ⅹ under the dual action of the fast rising water flow and the small upward centrifugal force; the coarse and fine non-magnetic minerals entering the overflow discharge chute 6 are discharged from the separation drum 19 as tailings through the tailings pipe 9 at the overflow port 7.

Claims

1. An ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals, characterized in that include: A separation drum (19), wherein the top of the separation drum (19) is provided with an overflow discharge chute (6), and the bottom of the separation drum (19) is provided with a coarse-grained concentrate discharge pipe (17); A hollow column (4), the hollow column (4) is inserted into the separation barrel (19), and the upper end is connected to the ore feeding pipe (1), the lower part of the hollow column (4) is a double-layer tube structure, and the sealing end is provided with a concentrate opening, and the sealing end is inclined toward the concentrate opening, and a concentrate scraper (8) is rotatably provided on the outer side of the hollow column (4); A central column (2), wherein the central column (2) is an inverted T-shaped structure, and the small end is inserted into the hollow column (4), the large end of the central column (2) is spaced apart from the lower end of the hollow column (4), and the sealed end of the hollow column (4) is symmetrically provided with a spiral connection part (41), the lower end of the connection part (41) is connected to the central column (2), a drug delivery tube (3) is inserted into the interior of the central column (2), and a drug disperser (12) connected to the drug delivery tube (3) is provided at the lower part; A fine-grained concentrate discharge pipe (14), one end of which passes through the central column (2) and the connecting portion (41) and is connected to the concentrate port, and the other end of which extends out of the separation cylinder (19); A coarse-fine particle periodic excitation coil (10), wherein the coarse-fine particle periodic excitation coil (10) is arranged on the inner wall of the separation drum (19) and the outer wall of the hollow cylinder (4), and the concentrate scraper (8) is arranged outside the coarse-fine particle periodic excitation coil (10) on the outer wall of the hollow cylinder (4); The ascending washing water separation pipe (15) is arranged at the lower end of the central column (2), and a plurality of water outlets with outlets arranged upward are arranged on the pipe wall.

2. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: It also includes a centrifugal guide plate (23), which is a spiral sheet structure and is arranged in a gap between the lower end of the hollow column (4) and the large end of the central column (2). The upper end of the centrifugal guide plate (23) is in contact with and connected to the lower end of the hollow column (4), and the lower end is connected to the central column (2).

3. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1 or 2, characterized in that: It also comprises a driving member and a transmission ring (21), wherein the transmission ring (21) is sleeved on the upper end of the hollow cylinder (4), and the driving member can drive the transmission ring (21) to rotate around the axis of the hollow cylinder (4). The concentrate scrapers (8) are arranged in a ring shape at intervals, and the upper ends are vertically connected to the lower end of the transmission ring (21).

4. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 3, characterized in that: The concentrate scraper (8) is a spiral structure and is sleeved on the outside of the hollow cylinder (4).

5. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 3, characterized in that: The driving member comprises a motor (22) and a guide wheel (20), wherein the guide wheel (20) is arranged at intervals in a ring shape at the upper end of the hollow cylinder (4), and the lower end of the transmission ring (21) is placed on the guide wheel (20), and the output end of the motor (22) is connected to the transmission ring (21) and can drive the transmission ring (21) to rotate around the axis of the hollow cylinder (4).

6. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: Ultrasonic wave generators (5) are arranged on the inner wall of the hollow cylinder (4) and the outer wall of the central column (2).

7. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: Brackets (25) are arranged at intervals on the circumference of the upper end of the hollow cylinder (4), and the hollow cylinder (4) is connected to the upper end of the sorting barrel (19) through the brackets (25). Connection bridges are arranged at intervals on the outer wall of the central column (2), and the outer ends of the connection bridges are connected to the inner wall of the hollow cylinder (4).

8. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: The overflow discharge chute (6) is provided with an overflow port (7), and a tailings pipe (9) is provided at the overflow port.

9. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: The ascending washed water separation pipe (15) is a plurality of groups of connected concentric annular pipes, one end of which is connected to a water supply pipe (16), and the other end of the water supply pipe (16) extends out of a sorting barrel (19).

10. The ultrasonic centrifugal magnetic separation column for enhancing the recovery of fine-grained minerals according to claim 1, characterized in that: High-frequency demagnetizers (18) are provided on the outer sides of the coarse-grained concentrate discharge pipe (17) and the fine-grained concentrate discharge pipe (14).

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