A fine fraction permanent wet vertical magnetic separator and method

Abstract

The application discloses a fine-grained permanent-magnetic wet vertical magnetic separator, which comprises a feeding cylinder and a magnetic separation assembly. The feeding cylinder comprises an outer cylinder and an inner cylinder. The inner cylinder is fixed in the outer cylinder through a support bracket. The top of the inner cylinder is provided with a feeding pipe. The bottom of the outer cylinder is provided with a conical discharging cylinder. The inner side of the conical discharging cylinder is provided with a mineral slurry reversing piece. The top of the outer cylinder is provided with a tailing discharging pipe. The inner wall of the outer cylinder is provided with a spiral material guiding structure. The magnetic separation assembly comprises a magnetic ring piece which is independently arranged outside the feeding cylinder. The bottom of the magnetic ring piece is connected with a driving piece through a transmission structure. The running direction of the magnetic ring piece is the same as the arrangement direction of the spiral material guiding structure. The magnetic ring piece is arranged outside and rotates to perform a magnetic separation operation on the mineral particles which flow from bottom to top on the inner side, so that the recovery rate of weak magnetic minerals and the concentrate grade are improved.

Description

Technical Field

[0001] This invention belongs to the field of magnetic separation equipment, specifically a fine-particle permanent magnet wet vertical magnetic separator and method. Background Technology

[0002] Magnetic separation is generally characterized by the interaction between magnetic force and gravity. In a magnetic field, the magnetic force on magnetic mineral particles is much greater than their own weight. Therefore, magnetic mineral particles are attracted from the slurry to the surface of the magnetic separator drum under the action of magnetic force, while non-magnetic mineral particles settle under the action of gravity, thus completing the separation process.

[0003] For weakly magnetic minerals with a mesh size of 325 or larger, normal magnetic separation is sufficient to separate the material. For minerals with a mesh size of less than 325, i.e., fine-grained weakly magnetic minerals, high-gradient electromagnetic separators are often used in production.

[0004] In the separation of fine-grained weakly magnetic minerals, high-gradient electromagnetic separators consume significant amounts of electricity and water, and have strict particle size requirements to prevent clogging and production disruptions. Therefore, grinding systems are typically required, leading to stringent screening requirements and substantial investment. This is especially true for limonite, where grinding easily results in mud formation and significant recovery losses. For small-scale concentrators with poor natural conditions, the use of high-gradient electromagnetic separators is limited, often necessitating alternative equipment. Due to the poor dispersibility of fine-grained minerals, they often clump together. However, the primary forces separating individual magnetic and non-magnetic minerals are magnetic and centrifugal forces. The small particle size of non-magnetic minerals means that the centrifugal force exerted by the rotating drum is insufficient to eject them from the drum, leaving them trapped in the magnetic minerals adsorbed on the drum and carried into the separated concentrate. This results in unsatisfactory separation, with the concentrate grade failing to meet requirements. In some cases, the concentration of harmful elements in the concentrate may even exceed acceptable levels.

[0005] For fine-grained mineral particles, the force situation changes significantly. For weakly magnetic minerals, as the particle size decreases, the difference between gravity, buoyancy, and magnetic force gradually decreases, making adsorption increasingly difficult. When this difference becomes small enough, the magnetic force on the magnetic material is much smaller than the interaction force formed by gravity and buoyancy on the material particles. Fine-grained non-magnetic mineral particles and magnetic material particles are suspended in the slurry. Under the influence of the disturbed flow field, they move with the slurry towards the tailings of the magnetic separator, making them difficult to capture. The movement direction of fine-grained non-magnetic minerals is the same as that of magnetic minerals. During the process of larger magnetic mineral particles moving towards the magnetic separator drum and forming magnetic agglomerates, they wrap the fine-grained non-magnetic mineral particles on the surface of the magnetic separator drum. Since fine-grained non-magnetic minerals are difficult to settle, the non-magnetic mineral particles that are removed during the tumbling of the magnetic agglomerates along the drum surface will be recaptured by the magnetic agglomerates and difficult to remove. This not only causes a decrease in concentrate quality but also reduces the recovery rate of weakly magnetic minerals.

[0006] A search revealed that CN103071587B discloses a high-efficiency rotating magnetic field dispersion separator. Although it adopts a vertical structure, it uses a design with an internal drum and its internal magnetic assembly. Due to the layout of the internal drum, in practical applications: firstly, the sealing of the magnetic separator needs to be strictly controlled, increasing equipment costs; secondly, due to the internal drum layout, there will be centrifugal force during magnetic separation. Fine-grained non-magnetic minerals are small in size, and the centrifugal force given to them by the rotating drum is insufficient to throw them off the drum. They are still carried into the concentrate after separation by the magnetic minerals adsorbed on the drum, resulting in unsatisfactory separation effect. At the same time, microparticle-sized weakly magnetic minerals are also easily detached, resulting in a low recovery rate of weakly magnetic minerals. Summary of the Invention

[0007] The technical problem to be solved by this invention is how to solve the problem of fine-grained non-magnetic minerals being encapsulated by magnetic minerals, which affects the grade of concentrate and the low recovery rate of weakly magnetic minerals.

[0008] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0009] A fine-particle permanent magnet wet vertical magnetic separator includes:

[0010] The feed cylinder includes an outer cylinder and an inner cylinder. The inner cylinder is fixed inside the outer cylinder by a bracket. A feed pipe is installed at the top of the inner cylinder. A conical discharge cylinder is installed at the bottom of the outer cylinder. A slurry reversing component is installed on the inner side of the conical discharge cylinder. A tailings discharge pipe is installed at the top of the outer cylinder. A spiral guiding structure is installed on the inner wall of the outer cylinder.

[0011] The magnetic separation assembly includes a magnetic ring component independently arranged on the outside of the feed cylinder. The bottom of the magnetic ring component is connected to a drive component through a transmission structure. The running direction of the magnetic ring component is the same as the arrangement direction of the spiral guide structure.

[0012] The slurry spirals down the inner wall of the inner cylinder along the tangential direction through the feed pipe. The slurry reversing component reverses the slurry, fully dispersing the material and ensuring that magnetic particles are suspended in the slurry for easy capture. Due to the influence of the slurry reversing component, the slurry rises in the gap between the outer and inner cylinders. As the slurry rises, the magnetic minerals are acted upon by the rotating magnetic ring component and gradually adhere to the spiral guide structure depending on the strength of the magnetic force on the magnetic particles. As the magnetic ring component continues to rotate, the captured magnetic particles are conveyed downwards along the spiral direction into the conical discharge cylinder. The magnetic particles are adsorbed inside the spiral groove and are not carried out of the magnetic field area by the rising slurry flow. Non-magnetic minerals rise from the gap between the outer and inner cylinders to the top of the outer cylinder and are discharged through the tailings discharge pipe.

[0013] In the fine-grained permanent magnet wet vertical magnetic separator, the slurry reversing component includes a conical seat installed at the bottom of the inner cylinder, the conical seat being fixed on a conical discharge cylinder, and a backwash water pipe being arranged on the conical seat. The backwash water pipe is used to convey the slurry that spirals downward into the inner cylinder upward.

[0014] In the fine-particle permanent magnet wet vertical magnetic separator, a conical separator is installed on the inner side of the conical discharge cylinder, and the top of the outer wall of the conical separator is fixed on the bottom inner ring of the spiral guide structure.

[0015] The bottom of the conical separator is located below the conical seat.

[0016] In the fine-particle permanent magnet wet vertical magnetic separator, the driving component is a geared motor, and the output end of the geared motor drives the magnetic ring component to rotate through belt drive;

[0017] The bottom of the magnetic ring component is provided with an inner rotating cylinder, which is installed inside the outer fixed cylinder through a bearing. The outer fixed cylinder is fixed on the frame, and a support frame is installed on the frame for installing the outer cylinder.

[0018] In the fine-particle permanent magnet wet vertical magnetic separator, a magnetic shielding sleeve is arranged inside the inner rotating cylinder. The magnetic shielding sleeve is independently arranged between the conical discharge cylinder and the magnetic ring. An annular guide groove is arranged on the inner wall of the magnetic shielding sleeve, and a sliding block is arranged in the annular guide groove. An elastic telescopic column is installed on the sliding block. A reciprocating lifting structure is arranged at the bottom of the magnetic shielding sleeve.

[0019] In the fine-particle permanent magnet wet vertical magnetic separator, the reciprocating lifting structure includes a rotating ring independently arranged at the bottom of the magnetic shielding sleeve. The rotating ring and the inner rotating cylinder are meshed together. The top of the rotating ring and the bottom of the magnetic shielding sleeve are in contact and both are provided with a continuous annular wave surface.

[0020] In the fine-grained permanent magnet wet vertical magnetic separator, the inner bottom of the conical discharge cylinder is provided with a concentrate discharge port and an air-expanding opening and closing component distributed in the concentrate discharge. The air-expanding opening and closing component is used to separate the upper and lower conical discharge cylinders to complete the upper ore beneficiation and the lower ore discharge.

[0021] In the fine-particle permanent magnet wet vertical magnetic separator, the air expansion opening and closing assembly includes an intermediate box, which is installed inside the conical discharge cylinder. The intermediate box and the conical discharge cylinder are connected by multiple hollow tubes, in which an air inlet pipe and an air outlet pipe are respectively inserted in two hollow tubes. An air bladder is installed inside the intermediate box and an external expansion port is provided on the side. The air bladder is connected to the air inlet pipe and the air outlet pipe. A vortex water distribution pipe is arranged at the bottom of the intermediate box.

[0022] A method for using a fine-particle permanent magnet wet vertical magnetic separator, comprising the following steps:

[0023] Step 1: Open the valve of the feed pipe to inject clean water into the inner cylinder until the inner cylinder is filled with clean water. Then, open the valve of the backwash water pipe to supply clean water into the inner cylinder. Adjust the flow rate of the backwash water pipe to 0.4 m³ / h and the flow rate of the feed pipe to 2.8 m³ / h.

[0024] Step 2: Switch the valve of the feed pipe to inject the same flow rate of slurry into the inner cylinder. The slurry spirals down along the inner wall of the inner cylinder. At the same time, turn on the driver, which drives the magnetic ring to rotate clockwise.

[0025] Step 3: The slurry and the bottom of the inner cylinder enter the area between the outer and inner cylinders through the combined action of the conical seat and the backwash water pipe. As it passes between the outer and inner cylinders, the magnetic minerals adhere to the surface of the spiral guide structure under the action of the rotating magnetic ring. Under the action of the rotating magnetic ring, the magnetic minerals descend along the spiral guide structure and enter the conical discharge cylinder. The non-magnetic minerals overflow from the top of the outer cylinder under the action of the backwash water pipe and are discharged through the tailings discharge pipe.

[0026] A method for using a fine-particle permanent magnet wet vertical magnetic separator, comprising the following steps:

[0027] Step 1: Open the valve of the feed pipe to inject clean water into the inner cylinder until the inner cylinder is filled with clean water. Then, open the valve of the backwash water pipe to supply clean water into the inner cylinder. Adjust the flow rate of the backwash water pipe to 0.4 m³ / h and the flow rate of the feed pipe to 2.8 m³ / h.

[0028] Step 2: Switch the valve of the feed pipe to inject the same flow rate of slurry into the inner cylinder. The slurry spirals down along the inner wall of the inner cylinder. At the same time, turn on the driver, which drives the magnetic ring to rotate clockwise.

[0029] Step 3: The slurry and the bottom of the inner cylinder enter the area between the outer and inner cylinders upwards under the combined action of the conical seat and the backwash water pipe. As it passes between the outer and inner cylinders, the magnetic minerals adhere to the surface of the spiral guide structure under the action of the rotating magnetic ring. Under the action of the rotating magnetic ring, the magnetic minerals descend along the spiral guide structure and enter the conical discharge cylinder. The non-magnetic minerals overflow from the top of the outer cylinder under the action of the backwash water pipe and are discharged through the tailings discharge pipe.

[0030] During the rotation of the magnetic ring, the rotating ring is driven to rotate. At the same time, the rotating ring drives the magnetic shielding sleeve to move up and down reciprocally, and performs reciprocating magnetic shielding treatment on the bottom of the spiral material guiding structure.

[0031] When online discharge of concentrate is required, the air inlet pipe supplies air into the airbag component. The airbag component expands and seals the inner wall of the conical discharge cylinder, dividing the conical discharge cylinder into an upper and a lower part. The upper part continues to be used for mineral processing. At this time, the valve of the concentrate discharge port is opened, and the cyclone water distribution pipe is opened to discharge the concentrate inside. After the discharge is completed, the valve is closed, and the air outlet pipe draws the gas from the airbag component out. The upper and lower parts are connected to each other.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] Compared with traditional drum magnetic separators, this method greatly reduces the loss of fine particles. For ultrafine particles, the recovery rate can be increased by increasing the height of the magnetic system and the outer drum. This changes the original method of magnetic separators that could only recover ultrafine particles by increasing the magnetic field strength, greatly reducing the manufacturing and operating costs of the equipment and the cost of mineral processing, and achieving the goals of energy saving, consumption reduction and high recovery rate of ultrafine particles.

[0034] Taking advantage of the small buoyancy and gravity difference of fine particles, the magnetic separation of magnetic minerals is achieved by using a bottom-up distribution method of fine particles combined with an external rotary magnetic separator. As the magnetic minerals are distributed upward, they are adhered to the surface of the spiral guide structure and transported downward in the opposite direction to the conical discharge cylinder, and discharged from the concentrate outlet at the bottom.

[0035] A partition plate is installed between the conical discharge cylinder and the conical seat. The partition plate is used to reduce the impact of the backwash water pipe on the magnetic minerals discharged after magnetic separation when it acts in the opposite direction on the fine particles. This prevents non-magnetic minerals from being mixed in with the magnetically separated minerals, and ensures the grade of the concentrate and the recovery rate of weakly magnetic minerals.

[0036] A magnetic shielding sleeve is installed on the outside of the conical discharge cylinder. During the rotation of the magnetic ring, the magnetic shielding sleeve is driven to move up and down in a reciprocating motion. During the reciprocating motion, the bottom of the spiral material guide structure is subjected to intermittent magnetic shielding treatment to prevent the accumulation of strongly magnetic minerals on the spiral material guide structure, which would affect the recovery rate of magnetic minerals.

[0037] An air-expansion opening and closing component is installed at the bottom of the inner side of the conical discharge cylinder. The air-expansion opening and closing component is used to separate the upper and lower areas, enabling simultaneous operation of online ore beneficiation in the upper part and ore discharge in the lower part, resulting in efficient production. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the internal structure of the magnetic separator in this invention. Figure 1 .

[0039] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0040] Figure 3 This is a top view of the magnetic separator in this invention.

[0041] Figure 4 This is a schematic diagram of the internal structure of the magnetic separator in this invention. Figure 2 .

[0042] Figure 5 This is a schematic diagram of the internal structure of the magnetic separator in this invention. Figure 3 .

[0043] Figure 6 for Figure 5 A magnified view of a section at point B in the middle.

[0044] Figure 7 This is a schematic diagram of the internal structure of the magnetic separator in this invention. Figure 4 .

[0045] Figure 8 for Figure 7 A magnified view of a section at point C.

[0046] Figure 9 This is a horizontal cross-sectional view of the middle box.

[0047] In the diagram: 10. Feed cylinder; 11. Outer cylinder; 12. Inner cylinder; 13. Feed pipe; 14. Slurry reversing component; 141. Backwash water pipe; 142. Conical seat; 15. Conical discharge cylinder; 151. Conical separator cylinder; 152. Intermediate box; 153. Hollow tube; 154. Air inlet pipe; 155. Air outlet pipe; 156. Swirl water distribution pipe; 157. Airbag component; 16. Tailings discharge pipe; 17. Spiral guide structure; 20. Magnetic ring component; 21. Drive component; 22. Inner rotating cylinder; 23. Outer fixed cylinder; 24. Frame; 25. Support frame; 26. Magnetic shielding sleeve; 27. Annular guide groove; 28. Elastic telescopic column; 29. ​​Rotary ring. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Example 1

[0051] like Figures 1 to 3 As shown, a fine-particle permanent magnet wet vertical magnetic separator includes:

[0052] The feed cylinder 10 includes an outer cylinder 11 and an inner cylinder 12. The inner cylinder 12 is fixed inside the outer cylinder 11 by a bracket. A feed pipe 13 is arranged at the top of the inner cylinder 12. The feed pipe 13 is arranged horizontally, and the slurry enters along the tangent direction of the inner wall of the inner cylinder 12. A conical discharge cylinder 15 is arranged at the bottom of the outer cylinder 11. A slurry reversing component 14 is installed on the inner side of the conical discharge cylinder 15. A tailings discharge pipe 16 is arranged at the top of the outer cylinder 11. A spiral guiding structure 17 is arranged on the inner wall of the outer cylinder 11.

[0053] The magnetic separation assembly includes a magnetic ring 20 independently arranged on the outside of the feed cylinder 10. The bottom of the magnetic ring 20 is connected to a drive unit 21 through a transmission structure. The running direction of the magnetic ring 20 is the same as the arrangement direction of the spiral guide structure 17.

[0054] The slurry spirals down along the inner wall of the inner cylinder 12 tangentially through the feed pipe 13. The slurry reversing component 14 reverses the mineral particles at the bottom of the inner cylinder 12, fully dispersing the material and ensuring that the magnetic material particles are suspended in the slurry for easy capture. Due to the influence of the slurry reversing component 14, the slurry rises in the gap between the outer cylinder 11 and the inner cylinder 12. As the slurry rises, the magnetic minerals are acted upon by the rotating magnetic ring component 20 and gradually adhere to the spiral guide structure 17 depending on the strength of the magnetic force on the magnetic particles. As the magnetic ring component rotates continuously, the captured magnetic particles are conveyed downwards along the spiral direction into the conical discharge cylinder 15. The magnetic particles are adsorbed inside the spiral groove and are not carried out of the magnetic field area by the rising slurry flow. Non-magnetic minerals rise from the gap between the outer cylinder 11 and the inner cylinder 12 to the top of the outer cylinder 11 and are discharged through the tailings discharge pipe 16.

[0055] The slurry reversing component 14 includes a conical seat 142 installed at the bottom of the inner cylinder 12. The conical seat 142 is fixed on the conical discharge cylinder 15. A backwash water pipe 141 is arranged on the conical seat 142. The backwash water pipe 141 is used to transport the slurry that spirals downward from the inner cylinder 12 upward.

[0056] The driving component 21 is a geared motor, and the output end of the geared motor drives the magnetic ring component 20 to rotate through belt drive.

[0057] The bottom of the magnetic ring component 20 is provided with an inner rotating cylinder 22, which is installed in the outer fixed cylinder 23 through a bearing. The outer fixed cylinder 23 is fixed on the frame 24, and a support frame 25 is installed on the frame 24 for installing the outer cylinder 11.

[0058] In actual use, the slurry is fed into the feed pipe 13 and spiraled downward along the inner wall of the inner cylinder 12. It is guided outward by the conical seat 142 at the bottom and moves upward by the backwash water pipe 141. The mineral particles enter the area between the inner cylinder 12 and the outer cylinder 11 from the bottom. The area between the two is 10-45mm. During the upward movement, the outer magnetic ring 20 rotates clockwise under the drive of the drive component 21 driven by the transmission structure. The magnetic minerals are adsorbed on the spiral guide structure 17 and guided downward under the action of the rotating magnetic field. Finally, they enter the conical discharge cylinder 15 to complete the sorting operation. The remaining non-magnetic minerals overflow from the top of the outer cylinder 11 under the action of water flow and are discharged through the tailings discharge pipe 16.

[0059] A method for using a fine-particle permanent magnet wet vertical magnetic separator, comprising the following steps:

[0060] Step 1: Open the valve of the feed pipe 13 to inject clean water into the inner cylinder 12 until the clean water inside the outer cylinder 11 is filled. Open the valve of the backwash water pipe 141 to supply clean water into the inner cylinder. Adjust the flow rate of the backwash water pipe 141 to 0.4 m³ / h and the flow rate of the feed pipe 13 to 2.8 m³ / h.

[0061] Step 2: Switch the valve of the feed pipe 13 to inject the same flow rate of slurry into the inner cylinder 12. The slurry spirals down along the inner wall of the inner cylinder 12. At the same time, turn on the drive component 21. The drive component 21 drives the magnetic ring component 20 to rotate clockwise.

[0062] Step 3: The slurry and the bottom of the inner cylinder 12 enter the area between the outer cylinder 11 and the inner cylinder 12 under the combined action of the conical seat 142 and the backwash water pipe 141. After passing between the outer cylinder 11 and the inner cylinder 12, the magnetic minerals adhere to the surface of the spiral guide structure 17 under the action of the rotating magnetic ring 20. Under the action of the rotating magnetic ring 20, the magnetic minerals go down along the spiral guide structure 17 and enter the conical discharge cylinder 15. The non-magnetic minerals overflow from the top of the outer cylinder 11 under the action of the backwash water pipe 141 and are discharged through the tailings discharge pipe 16.

[0063] Example 2

[0064] In the magnetic separator described in the above embodiments, such as Figure 4 As shown, in order to reduce the adverse effects on the flow of magnetically separated minerals falling after magnetic separation when the backwash water pipe 141 acts upward on the mineral particles, a conical separator 151 is installed on the inner side of the conical discharge cylinder 15, and the top of the outer wall of the conical separator 151 is fixed on the bottom inner ring of the spiral guide structure 17.

[0065] The bottom of the conical partition cylinder 151 is located below the conical seat 142.

[0066] Example 3

[0067] In the magnetic separator described in the above embodiment, since the magnetic field is not instantly disconnected at the bottom of the spiral guide structure 17, the magnetic minerals, especially strongly magnetic minerals, tend to concentrate at the bottom. To prevent strongly magnetic minerals from concentrating at the bottom of the spiral guide structure 17, causing blockages and scouring by reverse water flow, as follows... Figure 5 and Figure 6 As shown, a magnetic shielding sleeve 26 is arranged inside the inner rotating cylinder 22. The magnetic shielding sleeve 26 is independently arranged between the conical discharge cylinder 15 and the magnetic ring 20. An annular guide groove 27 is arranged on the inner wall of the magnetic shielding sleeve 26. A sliding block is arranged in the annular guide groove 27. An elastic telescopic column 28 is installed on the sliding block. A reciprocating lifting structure is arranged at the bottom of the magnetic shielding sleeve 26.

[0068] The reciprocating lifting structure includes a rotating ring 29 independently arranged at the bottom of the magnetic shielding sleeve 26. The rotating ring 29 and the inner rotating cylinder 22 are meshed. The top of the rotating ring 29 and the bottom of the magnetic shielding sleeve 26 are in contact and both are provided with a continuous annular wave surface.

[0069] During the rotation of the magnetic ring 20, the magnetic isolation sleeve 26 moves up and down, thereby completing the magnetic field disconnection operation of the spiral material guiding structure 17 with a certain width, and thus completing the automatic detachment of the magnetic minerals. The automatically detached magnetic minerals will enter the area between the conical separator and the conical discharge cylinder 15, and finally fall to the bottom of the conical discharge cylinder 15.

[0070] Example 4

[0071] In the magnetic separator described in the above embodiments, in order to achieve efficient production operations, such as... Figures 7 to 9 As shown, a concentrate outlet and an air-expanding opening and closing assembly are arranged on the inner bottom of the conical discharge cylinder 15. The air-expanding opening and closing assembly is used to separate the conical discharge cylinder 15 from the top and bottom to complete the upper ore beneficiation and the lower ore discharge.

[0072] like Figures 7 to 9As shown, the air expansion opening and closing assembly includes an intermediate box 152, which is installed inside the conical discharge cylinder 15. The intermediate box 152 and the conical discharge cylinder 15 are connected by multiple hollow tubes 153. An air inlet pipe 154 and an air outlet pipe 155 are respectively inserted into two hollow tubes 153. An air bladder component 157 is installed inside the intermediate box 152 and an external expansion port is provided on the side. The air bladder component 157 is connected to the air inlet pipe 154 and the air outlet pipe 155. A swirling water distribution pipe 156 is arranged at the bottom of the intermediate box 152.

[0073] During operation, when the bottom concentrate of the conical discharge cylinder 15 reaches a certain amount, gas is introduced into the airbag 157 through the air inlet pipe 154. The airbag 157 expands and seals the inner wall surface of the conical discharge cylinder 15, completing the separation of the upper and lower areas. The upper part continues to be used for mineral processing, and the lower part is used for ore discharge. During ore discharge, the cyclone water distribution pipe 156 discharges the concentrate. After the discharge is completed, the air outlet pipe 155 draws the gas out of the airbag 157, completing the connection between the upper and lower areas.

[0074] A method for using a fine-particle permanent magnet wet vertical magnetic separator, comprising the following steps:

[0075] Step 1: Open the valve of the feed pipe 13 to inject clean water into the inner cylinder 12 until the clean water inside the outer cylinder 11 is filled. Open the valve of the backwash water pipe 141 to supply clean water into the inner cylinder. Adjust the flow rate of the backwash water pipe 141 to 0.4 m³ / h and the flow rate of the feed pipe 13 to 2.8 m³ / h.

[0076] Step 2: Switch the valve of the feed pipe 13 to inject the same flow rate of slurry into the inner cylinder 12. The slurry spirals down along the inner wall of the inner cylinder 12. At the same time, turn on the drive component 21. The drive component 21 drives the magnetic ring component 20 to rotate clockwise.

[0077] Step 3: The slurry and the bottom of the inner cylinder 12 enter the area between the outer cylinder 11 and the inner cylinder 12 under the combined action of the conical seat 142 and the backwash water pipe 141. After passing between the outer cylinder 11 and the inner cylinder 12, the magnetic minerals adhere to the surface of the spiral guide structure 17 under the action of the rotating magnetic ring 20. Under the action of the rotating magnetic ring 20, the magnetic minerals go down along the spiral guide structure 17 and enter the conical discharge cylinder 15. The non-magnetic minerals overflow from the top of the outer cylinder 11 under the action of the backwash water pipe 141 and are discharged through the tailings discharge pipe 16.

[0078] During the rotation of the magnetic ring 20, it drives the rotating ring 29 to rotate. While the rotating ring 29 rotates, it drives the magnetic shielding sleeve 26 to move up and down reciprocally, performing reciprocating magnetic shielding treatment on the bottom of the spiral material guiding structure 17.

[0079] When online discharge of concentrate is required, the air inlet pipe 154 supplies air into the air bag 157. The air bag 157 expands and seals the inner wall of the conical discharge cylinder 15, dividing the conical discharge cylinder 15 into an upper part and a lower part. The upper part continues to be used for mineral processing. At this time, the valve of the concentrate discharge port is opened, and the cyclone water distribution pipe 156 is opened to discharge the concentrate inside. After the discharge is completed, the valve is closed, and the air outlet pipe 155 draws out the gas in the air bag 157. The upper and lower parts are connected to each other.

[0080] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A fine-particle permanent magnet wet vertical magnetic separator, characterized in that, include: The feed cylinder (10) includes an outer cylinder (11) and an inner cylinder (12). The inner cylinder (12) is fixed inside the outer cylinder (11) by a bracket. A feed pipe (13) is provided at the top of the inner cylinder (12). A conical discharge cylinder (15) is provided at the bottom of the outer cylinder (11). A slurry reversing component (14) is installed on the inner side of the conical discharge cylinder (15). A tailings discharge pipe (16) is provided at the top of the outer cylinder (11). A spiral guiding structure (17) is provided on the inner wall of the outer cylinder (11). The magnetic separation assembly includes a magnetic ring (20) independently arranged on the outside of the feed cylinder (10). The bottom of the magnetic ring (20) is connected to a drive unit (21) through a transmission structure. The running direction of the magnetic ring (20) is the same as the arrangement direction of the spiral guide structure (17). The driving component (21) is a geared motor, and the output end of the geared motor drives the magnetic ring component (20) to rotate through belt drive; The bottom of the magnetic ring component (20) is provided with an inner rotating cylinder (22), which is installed in the outer fixed cylinder (23) through a bearing. The outer fixed cylinder (23) is fixed on the frame (24), and a support frame (25) is installed on the frame (24) for installing the outer cylinder (11). The inner rotating cylinder (22) is provided with a magnetic shielding sleeve (26), which is independently arranged between the conical discharge cylinder (15) and the magnetic ring (20). The inner wall of the magnetic shielding sleeve (26) is provided with an annular guide groove (27), and a sliding block is provided in the annular guide groove (27). An elastic telescopic column (28) is installed on the sliding block. The bottom of the magnetic shielding sleeve (26) is provided with a reciprocating lifting structure. The reciprocating lifting structure includes a rotating ring (29) independently arranged at the bottom of the magnetic shielding sleeve (26). The rotating ring (29) and the inner rotating cylinder (22) are meshed. The top of the rotating ring (29) and the bottom of the magnetic shielding sleeve (26) are attached to each other and both are provided with a continuous annular wave surface.

2. The fine-particle permanent magnet wet vertical magnetic separator according to claim 1, characterized in that, The slurry reversing component (14) includes a conical seat (142) installed at the bottom of the inner cylinder (12). The conical seat (142) is fixed on the conical discharge cylinder (15). A backwash water pipe (141) is arranged on the conical seat (142). The backwash water pipe (141) is used to transport the slurry that spirals downward from the inner cylinder (12) upward.

3. A fine-particle permanent magnet wet vertical magnetic separator according to claim 2, characterized in that, A conical separator (151) is installed on the inner side of the conical discharge cylinder (15). The top of the outer wall of the conical separator (151) is fixed on the bottom inner ring of the spiral guide structure (17), and the bottom of the conical separator (151) is located below the conical seat (142).

4. A fine-particle permanent magnet wet vertical magnetic separator according to claim 3, characterized in that, The inner bottom of the conical discharge cylinder (15) is provided with a concentrate discharge port and an air expansion opening and closing component distributed in the concentrate discharge. The air expansion opening and closing component is used to separate the conical discharge cylinder (15) to complete the upper ore beneficiation and lower ore discharge.

5. A fine-particle permanent magnet wet vertical magnetic separator according to claim 4, characterized in that, The air expansion opening and closing assembly includes an intermediate box (152), which is installed inside the conical discharge cylinder (15). The intermediate box (152) and the conical discharge cylinder (15) are connected by multiple hollow tubes (153). An air inlet pipe (154) and an air outlet pipe (155) are respectively inserted in two hollow tubes (153). An air bladder component (157) is installed inside the intermediate box (152) and an external expansion port is provided on the side. The air bladder component (157) is connected to the air inlet pipe (154) and the air outlet pipe (155). A swirling water distribution pipe (156) is arranged at the bottom of the intermediate box (152).

6. The method of using a fine-particle permanent magnet wet vertical magnetic separator according to claim 5, characterized in that, The steps are as follows: Step 1: Open the valve of the feed pipe (13) to inject clean water into the inner cylinder (12) until the clean water inside the outer cylinder (11) is filled. Open the valve of the backwash water pipe (141) to supply clean water into the inner cylinder. Adjust the flow rate of the backwash water pipe (141) to 0.4 m³ / h and the flow rate of the feed pipe (13) to 2.8 m³ / h. Step 2: Switch the valve of the feed pipe (13) to inject the same flow rate of slurry into the inner cylinder (12). The slurry spirals down along the inner wall of the inner cylinder (12). At the same time, turn on the drive unit (21). The drive unit (21) drives the magnetic ring (20) to rotate clockwise. Step 3: The slurry and the bottom of the inner cylinder (12) enter the area between the outer cylinder (11) and the inner cylinder (12) under the combined action of the conical seat (142) and the backwash water pipe (141). After passing between the outer cylinder (11) and the inner cylinder (12), the magnetic minerals adhere to the surface of the spiral guide structure (17) under the action of the rotating magnetic ring (20). Under the action of the rotating magnetic ring (20), the magnetic minerals go down along the spiral guide structure (17) and enter the conical discharge cylinder (15). The non-magnetic minerals overflow from the top of the outer cylinder (11) under the action of the backwash water pipe (141) and are discharged through the tailings discharge pipe (16). During the rotation of the magnetic ring (20), the rotating ring (29) is driven to rotate. While the rotating ring (29) is rotating, the magnetic shielding sleeve (26) is driven to move up and down reciprocally to perform reciprocating magnetic shielding treatment on the bottom of the spiral material guiding structure (17). When it is necessary to discharge concentrate online, the air inlet pipe (154) supplies air into the air bag (157), and the air bag (157) expands and seals the inner wall of the conical discharge cylinder (15), dividing the conical discharge cylinder (15) into an upper part and a lower part. The upper part continues to be used for mineral processing. At this time, the valve of the concentrate discharge port is opened, and the vortex water distribution pipe (156) is opened to discharge the concentrate inside. After the discharge is completed, the valve is closed, and the gas in the air bag (157) is drawn out by the air outlet pipe (155). The upper and lower parts are connected to each other.

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