Central swivel structure
Through the central rotation ring structure design, the magnetic magnetic cartridge can rotate and rotate in the background magnetic field, solving the problem of unchanged induced magnetic field strength in traditional magnetic separators, improving the magnetic separation quality and sorting efficiency, and reducing production costs.
Patent Information
- Application Number
- CN202510950911.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-08-26
AI Technical Summary
In traditional vertical ring pulsating high-gradient magnetic separators, the intensity of the induction magnetic field generated by the magnetic medium in the background magnetic field remains unchanged, resulting in serious mechanical inclusion and magnetic product inclusion, which reduces the magnetic separation quality and sorting efficiency.
The central rotation ring structure is adopted, and the magnetic medium box is driven through the transmission shaft to achieve rotation and revolution in the background magnetic field, periodically changing the intensity of the induced magnetic field to reduce mechanical inclusions and magnetic product inclusions.
The magnetic separation quality is improved, the selectivity and adaptability to magnetic minerals are enhanced, the sorting efficiency is improved, and the production cost is reduced.
Smart Images
Figure CN120532631A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of magnetic separation equipment, and particularly relates to a central rotating ring structure. Background Art
[0002] One of the key reasons for the widespread application of vertical ring pulsating high-gradient magnetic separation technology is that it introduces a mechanical force through the pulsating mechanism that competes with the magnetic force, thereby improving selectivity. This approach has been emulated by other researchers, who have either increased the selectivity of magnetic media by introducing mechanical vibration or pulsating rinsing, improved selectivity by introducing centrifugal force, introduced ultrasound to use continuous bubbling to assist in reducing mechanical inclusions, or used paramagnetic liquids to adjust the magnetic force on the particles, reducing the gangue components introduced by competitive capture and improving the grade of the concentrate.
[0003] In a traditional vertical ring pulsating high-gradient magnetic separator, a rotating ring rotates clockwise, continuously feeding magnetic media into and out of the separation zone. Slurry is fed from a feed hopper and flows through the rotating ring along the gaps in the upper iron yoke. Magnetic particles in the slurry are attracted to the surface of the magnetic media and carried by the rotating ring to the top, where they are free of magnetic fields. Flushing water flushes them into the concentrate hopper. Non-magnetic particles, driven by gravity and pulsating fluid forces, pass through the magnetic media pile, separating them from the magnetic particles. They then flow through the gaps in the lower iron yoke and into the tailings hopper for discharge. This device's rotating ring rotates vertically. For each fixed set of magnetic media, the direction of flushing the magnetic concentrate is opposite to the direction of feed, allowing coarse particles to be flushed out without passing through the magnetic media pile. The pulsating mechanism in this device generates pulsations in the slurry, loosening the ore particles within the magnetic media pile in the separation zone, allowing non-magnetic particles to pass through the pile quickly and enter the tailings.
[0004] In fact, the main role of mineral capture in vertical ring pulsating high gradient magnetic separation equipment is the high-intensity induced magnetic field generated on the surface of the magnetic medium, and the excitation of the induced magnetic field is mainly generated by the constant magnetic field in the background magnetic field. This results in the rotating ring being able to carry multiple sets of fixed magnetic mediums to move alternately between the background magnetic field area and the magnetic field-free area. However, when the rotating ring drives the magnetic medium into the background magnetic field area and contacts and collides with the slurry, the constant magnetic field in the background magnetic field always excites the magnetic medium to generate a continuous high-intensity induced magnetic field. Since the magnetic induction intensity generated by the rotating ring after driving the magnetic medium into the background magnetic field is about 1.5 to 2 times that of the background magnetic induction intensity, the magnetic force acting on the mineral particles is constant and far greater than the mechanical competitiveness. In other words, the magnetic mineral particles that come into contact with the magnetic medium in the process of the rotating ring carrying the magnetic medium through the background magnetic field will be continuously intercepted. However, when a certain number of magnetic particles are captured on the surface of the magnetic medium, more serious mechanical inclusions and magnetic product inclusions will occur, reducing the magnetic separation quality and making it difficult to meet the expected magnetic separation requirements. Summary of the Invention
[0005] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a central rotating ring structure, which can realize the self-rotation of the transmission shaft while accompanying the revolution of the rotating disk through the improved design of the central rotating ring structure, so that the magnetic medium box can realize continuous rotation in the process of crossing the background magnetic field under the drive of the transmission shaft, thereby improving the quality of magnetic separation and better adapting to the needs of magnetic separation.
[0006] The technical solution of the present invention is: A central rotating ring structure, comprising: Turn the disk; A plurality of transmission shafts are arranged in a circular array on one side of the rotating disk, one end of each transmission shaft is rotatably connected to the rotating disk, and the other end is used to connect to a magnetic medium box; a driving assembly, the output end of which is connected to the rotating disk and is used to drive the rotating disk to rotate; A transmission assembly includes a plurality of transmission wheels and a transmission belt, wherein the plurality of transmission wheels correspond one-to-one to the plurality of transmission shafts, the transmission wheels are fixed on the transmission shafts, and two adjacent transmission wheels are connected by a transmission belt; A power transmission component, the output end of which is connected to one or more of the transmission shafts, is used to achieve synchronous rotation of multiple transmission shafts by cooperating with the transmission component during the rotation of the rotating disk.
[0007] Preferably, the power transmission assembly includes a driving gear and multiple driven gears, and the multiple driven gears correspond one-to-one to multiple transmission shafts. The driven gear is fixed to the side of the magnetic medium box away from the transmission shaft through the gear shaft, and the axes of the transmission shaft and the gear shaft connected to the same magnetic medium box coincide with each other. The driving gear is used to be fixedly installed on the magnetic separator body, and the multiple driven gears surround the driving gear, and the driven gears are engaged with the driving gear.
[0008] Preferably, the power transmission assembly includes an electric drum having an output shaft that performs rotational motion, and the output shaft is connected to one of the transmission shafts.
[0009] Preferably, a plurality of the electric rollers are provided, and the plurality of the electric rollers are arranged in a circular array on one side of the rotating disk, and the rotation directions of the output shafts of the plurality of the electric rollers are consistent, and a plurality of the magnetic medium boxes are arranged between two adjacent electric rollers.
[0010] Preferably, the rotating disk includes an edge ring plate, a first intermediate connecting plate, a center disk, an intermediate rib plate, a second intermediate connecting plate and an end cover, the center disk is in the shape of a circular disk, the edge ring plate is mounted on the center disk and the two are fixedly connected by the first intermediate connecting plate, a plurality of the transmission wheels are arranged in a circular array on the edge ring plate and are rotatably connected thereto, the second intermediate connecting plate and the end cover are arranged on the side of the edge ring plate facing the pulley, and the second intermediate connecting plate and the end cover are fixedly connected by a plurality of intermediate rib plates, a plurality of the magnetic medium boxes are all arranged between the second intermediate connecting plate and the end cover, the second intermediate connecting plate is placed between the edge ring plate and the magnetic medium box, the transmission shaft is inserted into the second intermediate connecting plate, and the end of the magnetic medium box away from the transmission shaft is rotatably connected to the end cover.
[0011] Preferably, a plurality of mounting grooves corresponding one-to-one to the transmission shafts are opened in a circumferential array on the side of the edge ring plate, and one end of the transmission shaft is rotatably connected to the mounting groove via a bearing.
[0012] Preferably, the transmission wheel and the transmission belt are both multi-V belt wheels and multi-V belts respectively.
[0013] Preferably, the rotating disk, transmission shaft, transmission wheel, transmission belt, power transmission component and driving component are all made of non-magnetic materials.
[0014] Compared with the prior art, the center swivel structure of the present invention has the following beneficial effects: The central rotating ring structure provided by the present invention first drives the rotating disk through the driving component to realize multiple transmission shafts carrying the magnetic medium box to revolve in the background magnetic field, and then through the cooperation of the power transmission component and the transmission component, it can drive multiple transmission shafts to rotate synchronously during the rotation of the rotating disk, so that the magnetic medium box can rotate in the background magnetic field under the drive of the transmission shaft, so that the rotation and revolution of the magnetic medium box are synchronized through the central rotating ring structure, so that the induced magnetic field generated by the magnetic medium box in the background magnetic field has periodic strength changes, so that the magnetic force exerted on the mineral particles on the surface of the magnetic medium produces a periodic force law of "agglomeration-dispersion-agglomeration", effectively reducing mechanical inclusions and magnetic product inclusions in the strong magnetic separation process, improving the selectivity of the separation process, improving the quality of magnetic separation, and improving the purity of the magnetic product. At the same time, it also improves the sorting efficiency, can effectively shorten the subsequent processing process of the magnetic product, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of a first assembly of the central rotating ring structure and the magnetic medium box in an embodiment of the present invention; Figure 2 FIG is a second assembly diagram of the central rotating ring structure and the magnetic medium box in an embodiment of the present invention; Figure 3 for Figure 1 Schematic diagram of the enlarged structure of A; Figure 4 Schematic diagram of the installation of the transmission wheel and the transmission belt on the rotating disk in an embodiment of the present invention; Figure 5 Schematic diagram of the installation of the transmission wheel and the transmission belt in an embodiment of the present invention; Figure 6 Schematic diagram of the installation of the transmission wheel and the transmission belt in an embodiment of the present invention; Figure 7 A schematic diagram of a portion of the structure of a rotating disk in an embodiment of the present invention; Figure 8 is a side view of a rotating disk according to an embodiment of the present invention; Figure 9 for Figure 7 Schematic diagram of the enlarged structure at point B in the middle.
[0016] Description of reference numerals: 1. Rotating plate; 11. Side ring plate; 12. First intermediate connecting plate; 13. Center plate; 14. Intermediate rib plate; 15. Second intermediate connecting plate; 16. End cover; 2. Transmission shaft; 3. Transmission assembly; 31. Transmission wheel; 32. Transmission belt; 4. Electric roller; 5. Magnetic medium box; 6. Mounting slot; 7. Intermediate transparent cover. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.
[0019] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0020] A traditional vertical ring pulsating high-gradient magnetic separator mainly includes a frame, a pulsating mechanism, a tailings box, an iron armor, an excitation coil, a sorting trough, a magnetic conversion unit, an unloading structure, a concentrate trough, a liquid level adjustment device, a pulsating mechanism drive device, a feed trough, a flushing water trough, and a coil cooling assembly. The pulsating mechanism and the pulsating mechanism drive device are connected to the tailings box; the iron armor, the excitation coil, and the coil cooling assembly together constitute the background magnetic field generation system of the vertical ring pulsating high-gradient magnetic separator; the sorting trough, the center swivel structure, the magnetic medium box 5, the liquid level adjustment device, and the flushing water trough form the sorting area of the vertical ring pulsating high-gradient magnetic separator; the feed trough, the unloading structure, the concentrate trough, and the tailings box serve as the material inlet and product outlet structures of the vertical ring pulsating high-gradient magnetic separator; the frame serves as the support for all structures, and the magnetic field control parameters, pulsation parameters, and swivel rotation parameters of the vertical ring magnetic separator can be adjusted through the control system of the entire machine.
[0021] Direct current flows through the excitation coil, generating an induced magnetic field in the separation zone. This generates a non-uniform magnetic field, or high-gradient magnetic field, on the surface of the magnetic media within the separation zone. The rotating ring rotates clockwise, continuously feeding the magnetic media in and out of the separation zone. Slurry is fed from the feed hopper and flows through the rotating ring through the gaps in the upper iron yoke. Magnetic particles in the slurry are attracted to the surface of the magnetic media and carried by the rotating ring to the top, where they are free of magnetic fields. Flushing water flushes them into the concentrate hopper. Non-magnetic particles, driven by gravity and pulsating fluid forces, pass through the magnetic media pile and are separated from the magnetic particles. They then flow through the gaps in the lower iron yoke and into the tailings hopper for discharge. The rotating ring of this equipment rotates vertically. For each fixed set of magnetic media, the direction of flushing the magnetic concentrate is opposite to the direction of feed, allowing coarse particles to be flushed out without passing through the magnetic media pile. The pulsating mechanism of the machine generates pulsation in the slurry, loosening the ore particles within the magnetic media pile within the separation zone, allowing non-magnetic particles to pass through the pile quickly and enter the tailings.
[0022] However, in reality, the main role of mineral capture in vertical ring pulsating high-gradient magnetic separation equipment is the high-intensity induced magnetic field generated on the surface of the magnetic medium, while the main source of the induced magnetic field is the constant magnetic field in the background magnetic field. This results in the rotating ring being able to carry multiple sets of fixed magnetic mediums to alternate between the background magnetic field area and the magnetic field-free area. However, when the rotating ring drives the magnetic medium into the background magnetic field area and collides with the slurry, the constant magnetic field in the background magnetic field always stimulates the magnetic medium to produce a continuous high-intensity induced magnetic field. The magnetic induction intensity generated by the magnetic medium placed in the background magnetic field is about 1.5 to 2 times that of the background magnetic induction intensity, resulting in the magnetic force acting on the mineral particles being constant and far greater than the mechanical competitiveness. In other words, magnetic mineral particles contacting the magnetic medium in the background magnetic field will be continuously intercepted. However, when a certain number of magnetic particles are captured on the surface of the magnetic medium, more serious mechanical inclusions and magnetic product inclusions will occur, reducing the magnetic separation quality and making it difficult to meet the expected magnetic separation requirements.
[0023] In order to effectively improve the selectivity and adaptability of magnetic mineral particles, reduce mechanical inclusions and magnetic product inclusions during high-intensity magnetic separation, improve the purity of magnetic products, improve separation efficiency, effectively shorten the subsequent processing of magnetic products, and reduce production costs, this embodiment provides a central rotating ring structure.
[0024] Among them, see Figures 1 to 9 As shown, the central rotating ring structure is entirely made of non-magnetic material and includes a rotating disk 1, multiple drive shafts 2, a transmission assembly 3, a power transmission assembly, and a drive assembly. The multiple drive shafts 2 are arranged in a circular array on one side of the rotating disk 1 and are rotatably connected to the rotating disk 1. Each drive shaft 2 has one end, facing away from the rotating disk 1, fixedly connected to a magnetic medium box 5. The transmission assembly 3 includes multiple drive wheels 31 and a transmission belt 32. The multiple drive wheels 31 correspond one-to-one with the multiple drive shafts 2. The drive wheels 31 are fixed to the drive shafts 2, and each adjacent drive wheel 31 is connected by a transmission belt 32. The power transmission assembly, at its output end, is connected to any one of the drive shafts 2. The power transmission assembly is used to synchronize the multiple drive shafts 2 through cooperation with the transmission assembly 3, thereby achieving the rotation of the magnetic medium box 5. The drive assembly, at its output end, is connected to the rotating disk 1 to drive the rotating disk 1 to rotate, thereby achieving the orbital revolution of the magnetic medium box 5. Preferably, the rotation axis of the magnetic medium box 5 is parallel or perpendicular to the direction of the background magnetic field. A middle transparent cover 7 corresponding to each of the plurality of magnetic medium boxes 5 is further provided on the side of the rotating disk 1 facing the transmission shaft 2 , and the middle transparent cover 7 is sleeved on the magnetic medium boxes 5 .
[0025] For further information, see Figures 3 to 9 As shown, in order to achieve the stability of the rotation of the magnetic medium box 5, the rotating disk 1 includes an edge ring plate 11, a first intermediate connecting plate 12, a center disk 13, an intermediate rib plate 14, a second intermediate connecting plate 15 and an end cover 16. The center disk 13 is disc-shaped, and the edge ring plate 11 is mounted on the center disk 13 and the two are fixedly connected by the first intermediate connecting plate 12. A plurality of transmission wheels 31 are arranged in a circumferential array on the edge ring plate 11 and are rotatably connected thereto. It is preferred that a plurality of mounting holes corresponding to the transmission shaft 2 are opened in the side circumferential array of the edge ring plate 11. Slot 6, one end of the transmission shaft 2 is rotatably connected to the mounting slot 6 through a bearing, the second intermediate connecting plate 15 and the end cover 16 are arranged on the side of the side ring plate 11 facing the pulley, and the second intermediate connecting plate 15 and the end cover 16 are fixedly connected by multiple intermediate ribs 14, multiple magnetic medium boxes 5 are arranged between the second intermediate connecting plate 15 and the end cover 16, the second intermediate connecting plate 15 is placed between the edge ring plate 11 and the magnetic medium box 5, the transmission shaft 2 is inserted on the second intermediate connecting plate 15, and the end of the magnetic medium box 5 away from the transmission shaft 2 is rotatably connected to the end cover 16.
[0026] Furthermore, in order to realize the self-rotation of the magnetic medium box 5, this solution designs two structural combinations for the power transmission component, as follows: First, see Figures 2 to 6 As shown, the power transmission assembly includes a motorized roller 4, of which there is at least one, and multiple motorized rollers 4 may be provided. The motorized roller 4 has a rotational output shaft connected to one of the drive shafts 2. Thus, when in use, by starting the motorized roller 4, the motorized roller 4 can directly drive at least one of the drive shafts 2 to rotate, while the other drive shafts 2 rotate synchronously through the cooperation of the drive pulley 31 and the drive belt 32. To ensure stable and effective synchronous transmission of each drive shaft 2, the drive pulley 31 and the drive belt 32 preferably utilize multi-wedge pulleys and multi-V belts. Furthermore, to ensure stable synchronous rotation of multiple drive shafts 2, multiple motorized rollers 4 are generally provided. When multiple motorized rollers 4 are provided, they are arranged in a circular array on one side of the rotating disk 1, with the output shafts of the multiple motorized rollers 4 rotating in the same direction. Multiple magnetic medium boxes 5 are arranged between two adjacent motorized rollers 4. Preferably, 6 to 10 magnetic medium boxes 5 are generally provided between two adjacent motorized rollers 4.
[0027] Secondly, the power transmission assembly can also include a combination of a driving gear and multiple driven gears (not shown in the figure), and the multiple driven gears correspond to the multiple transmission shafts 2 one by one. Figure 1 As shown, the number of magnetic medium cassettes 5 is the same as the number of transmission shafts 2, and they are arranged in a one-to-one correspondence. A driven gear is fixed to the side of the magnetic medium cassette 5 away from the transmission shaft 2 via a gear shaft. The gear shaft passes through an end cap 16 and is fixedly connected to the corresponding magnetic medium cassette 5. The axes of the transmission shaft 2 and the gear shaft connected to the same magnetic medium cassette 5 coincide. The driving gear is fixedly mounted on the frame of the magnetic separator body. Multiple driven gears surround the driving gear and mesh with the driving gear. During use, the drive assembly drives the rotating disk 1 to rotate, which in turn drives the multiple magnetic medium cassettes 5 to orbit around the rotation axis of the rotating disk 1. During each revolution of the magnetic medium cassettes 5, the driven gears connected to the magnetic medium cassettes 5, driven by the driving gear, drive the magnetic medium cassettes 5 to rotate. In other words, when the power transmission assembly is a combination of a driving gear and a driven gear, it is dependent on the rotation of the rotating disk 1. This allows the magnetic medium cassettes 5 to rotate synchronously.
[0028] Furthermore, in order to realize the rotation of the rotating disk 1, the driving assembly can be composed of a rotary driver and a rotating shaft. The rotating driver should adopt a servo motor. The rotating shaft and the rotating driver are fixed coaxially, and the rotating disk 1 is fixed on the rotating shaft. The servo motor provides power to the rotating shaft, which can drive the rotating ring to rotate, thereby realizing the revolution of the magnetic medium box 5.
[0029] Furthermore, in order to improve the sorting effect and ensure that the magnetic medium rods can alternately switch between being parallel and perpendicular to the background magnetic field during the revolution and rotation of the magnetic medium box 5, the magnetic medium box 5 has the following two structures: First, the magnetic medium box 5 includes side plates made of non-magnetic material, fixed ribs, and magnetic medium rods made of magnetic material. Two side plates are arranged opposite each other, and the two side plates are coaxially arranged circular disks. A plurality of staggered fixed ribs and magnetic medium rods are distributed between the two side plates. The fixed ribs are perpendicular to the axis of the side plates, and the ends of the fixed ribs are respectively fixed to the two side plates, and the magnetic medium rods are fixed to the fixed ribs. The front axle is coaxially fixed to the side wall of one side plate facing away from the fixed ribs, and the rear axle is coaxially fixed to the side of the other side plate facing away from the fixed ribs. The front axle is coaxially fixed to one of the transmission shafts 2, and the rear axle is rotationally connected to the end cap 16 or coaxially fixed to the gear shaft. Specifically, the magnetic concentrating dielectric rods are parallel to the side plates, and the fixing ribs are perpendicular to the side plates. Multiple magnetic concentrating dielectric rods are arranged in groups at equal intervals along the axis of the fixing ribs. The magnetic concentrating dielectric rods in each group are evenly spaced outward from the axis of the side plates. The length of the magnetic concentrating dielectric rods in a group gradually decreases from the axis of the side plates toward the sides, and each magnetic concentrating dielectric rod is fixedly connected to a fixing rib at each end. The diameter of the magnetic concentrating dielectric rods is generally set to 1mm to 5mm, the distance between adjacent fixing ribs is set to 50mm to 100mm, and the diameter of the fixing ribs is set to 5mm to 10mm.
[0030] Secondly, the magnetic medium box 5 includes, in addition to side plates made of non-magnetic material, fixed ribs, and magnetic medium rods made of magnetic material, a central spindle. The two ends of the central spindle are fixedly connected to the two side plates, and the central spindle and the side plates are coaxial. A plurality of fixed ribs are arranged in a circular array around the central spindle. Between each fixed rib and the central spindle, a plurality of magnetic medium rods are arranged along the axis of the central spindle. One end of the magnetic medium rod is fixedly connected to the fixed rib, and the other end is inserted vertically into a reserved hole on the side wall of the central spindle. The diameter of the magnetic medium rod is generally set to 1mm to 5mm. The diameter of the reserved hole is 1.2 to 1.5 times larger than the diameter of the magnetic medium rod and has a depth of 5mm to 8mm. The spacing between two adjacent reserved holes is 2 to 3 times the diameter of the magnetic medium rod. The distance between two adjacent fixed ribs is 50mm to 100mm, and the diameter of the fixed rib is 5mm to 10mm.
[0031] The implementation principle of this device: When sorting mineral particles, a power transmission component is used to drive multiple transmission shafts 2 to rotate, so as to realize the self-rotation of the magnetic medium box 5 in the background magnetic field, and the driving component is used to drive the rotating disk 1 to rotate, so as to realize the revolution of the specific medium box. Therefore, under the action of the self-rotation and revolution of the magnetic medium box 5, the axial direction of the magnetic medium rod in the magnetic medium box 5 forms an alternating conversion motion between perpendicular and parallel to the direction of the background magnetic field (that is, the angle between the axial direction of the magnetic medium rod and the direction of the background magnetic field forms a periodic transformation of 0°~360°), that is, the axial direction of the magnetic medium rod and the direction of the background magnetic field produce a "perpendicular-parallel-perpendicular" periodic motion, so that the induced magnetic field on the surface of the magnetic medium rod produces a periodic "strong-weak-strong" change. When the axis of the magnetic medium box 5 is perpendicular to the direction of the background magnetic field, the magnetic force on the mineral particles is the largest, and when the axis of the magnetic medium box 5 is parallel to the direction of the background magnetic field, the magnetic force on the mineral particles is the smallest, thereby causing the magnetic force on the mineral particles on the surface of the magnetic medium to change periodically, and enabling the magnetic mineral particles to be subjected to a periodic force law similar to "agglomeration-dispersion-agglomeration" under the action of the magnetic force, effectively overcoming the defects of existing magnetic separation equipment, improving the selectivity of the separation process, effectively improving the selectivity and adaptability of magnetic mineral particles, reducing mechanical inclusions and magnetic product inclusions in the strong magnetic separation process, improving the purity of the magnetic product, improving the separation efficiency, effectively shortening the subsequent processing of the magnetic product, and reducing production costs. In addition, when the magnetic medium box 5 carries weak magnetic minerals to the top of the magnetic separator to unload the ore, the rotating magnetic medium box 5 under the action of the top flushing water will unload the ore more thoroughly, on the one hand, increasing the cyclic load capacity of the magnetic medium rod, and on the other hand, increasing the rotation speed of the rotating disk 1, thereby increasing the effective processing capacity of the magnetic separator.
[0032] The comparison between the case of using this device to provide a vertical ring pulsating high gradient magnetic separator for mineral separation and the traditional process separation is as follows: For a specific Anshan-type hematite ore, the particle size was -0.074 mm, accounting for 83% of the ore, and the TFe grade was 35.45%. The main useful minerals were strongly magnetic magnetite and weakly magnetic hematite, with magnetite accounting for 12% of the iron ore. The main gangue mineral was non-magnetic quartz, and the degree of separation between the iron-bearing minerals and the gangue minerals was 93.55%. In a conventional separation process, a drum magnetic separator with a magnetic field strength of 2400 Gs was first used to separate the strongly magnetic minerals. The concentrate had a TFe grade of 52.33% and the tailings had a TFe grade of 29.82%. The tailings from the weak magnetic separation were then subjected to strong magnetic separation using an existing magnetic separator. The background magnetic induction intensity was 1.0 T, the diameter of the magnetic rod was 2 mm, and the rotating disk speed was 5 rpm. The TFe grades of the strongly magnetic concentrate and tailings were 42.65% and 8.85%, respectively. The concentrates from the drum magnetic separator and the vertical ring magnetic separator are then combined, with a TFe grade of 46.03%. A reverse flotation process consisting of one coarse, one fine, and two sweeps is then carried out, and the final iron concentrate has a TFe grade greater than 67.50%.
[0033] After adopting the new vertical ring pulsating high gradient magnetic separator provided by the present invention, the selectivity and adaptability to magnetic materials are significantly enhanced. Specifically, when the tailings of the above-mentioned drum magnetic separator are sorted, the background magnetic induction intensity is 1.0T, the diameter of the magnetic medium rod is 2mm, the speed of the rotating disk 1 is 5r / min, and the rotation speed of the magnetic medium box 5 is 12r / min. When the feed TFe grade is 29.82%, the first stage of sorting can obtain a concentrate with a TFe grade of 55.80% and a tailings grade of 9.44%. The inclusion problem in the strong magnetic separation process is effectively solved. The grade of the mixed concentrate after merging with the concentrate of the drum magnetic separator is 54.30%, which is 8.27 percentage points higher than the original production system, which significantly reduces the subsequent flotation cost.
[0034] When directly sorting raw material with a TFe grade of 35.45%, the background magnetic induction intensity is 1.0 T, the diameter of the magnetic medium rod 2 is 2 mm, the speed of the rotating disk 1 is 4 rpm, and the rotation speed of the magnetic medium box 5 is 15 rpm. A single-stage sorting process yields a mixed iron concentrate with a TFe grade of 50.65%, a 4.61 percentage point improvement over the original production system, and a tailings grade of 9.10%. This clearly demonstrates that the application of the present invention improves the efficiency of vertical ring high-gradient magnetic separation, increases the flotation feed grade, and effectively reduces production costs.
[0035] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.
Claims
1. A central rotating ring structure, characterized in that: include: Rotating disk (1); A plurality of transmission shafts (2) are arranged in a circular array on one side of the rotating disk (1), one end of each transmission shaft (2) is rotatably connected to the rotating disk (1), and the other end is used to be connected to a magnetic medium box (5); A driving assembly, the output end of which is connected to the rotating disk (1) and is used to drive the rotating disk (1) to rotate; A transmission assembly (3) comprising a plurality of transmission wheels (31) and a transmission belt (32), wherein the plurality of transmission wheels (31) correspond one-to-one to the plurality of transmission shafts (2), the transmission wheels (31) are fixedly mounted on the transmission shafts (2), and two adjacent transmission wheels (31) are connected via a transmission belt (32); A power transmission component, the output end of which is connected to one or more of the transmission shafts (2), is used to achieve synchronous rotation of the multiple transmission shafts (2) by cooperating with the transmission component (3) during the rotation of the rotating disk (1).
2. A center rotating ring structure according to claim 1, characterized in that: The power transmission assembly includes a driving gear and a plurality of driven gears, wherein the plurality of driven gears correspond to a plurality of transmission shafts (2) on a one-to-one basis, and the driven gears are fixed to a side of the magnetic medium box (5) away from the transmission shaft (2) through a gear shaft, and the axes of the transmission shaft (2) and the gear shaft connected to the same magnetic medium box (5) coincide with each other, and the driving gear is used for being fixedly mounted on the magnetic separator body, and the plurality of driven gears surround the driving gear, and the driven gears are meshed with the driving gear.
3. The center rotating ring structure according to claim 1, characterized in that: The power transmission assembly comprises an electric roller (4), wherein the electric roller (4) has an output shaft capable of rotating, and the output shaft is connected to one of the transmission shafts (2).
4. A center rotating ring structure according to claim 3, characterized in that: A plurality of the electric rollers (4) are provided, and the plurality of the electric rollers (4) are arranged in a circumferential array on one side of the rotating disk (1), and the rotation directions of the output shafts of the plurality of the electric rollers (4) are consistent, and a plurality of the magnetic medium boxes (5) are arranged between two adjacent electric rollers (4).
5. The center rotating ring structure according to claim 1, characterized in that: The rotating disk (1) comprises an edge ring plate (11), a first intermediate connecting plate (12), a center disk (13), an intermediate rib plate (14), a second intermediate connecting plate (15) and an end cover (16). The center disk (13) is in the shape of a circular disk. The edge ring plate (11) is mounted on the center disk (13) and the two are fixedly connected via the first intermediate connecting plate (12). A plurality of transmission wheels (31) are arranged in a circumferential array on the edge ring plate (11) and are rotatably connected thereto. The second intermediate connecting plate (15) and the end cover (16) are arranged on the center disk (13). The side ring plate (11) faces the pulley, and the second intermediate connecting plate (15) and the end cover (16) are fixedly connected through a plurality of intermediate ribs (14), and a plurality of magnetic medium boxes (5) are arranged between the second intermediate connecting plate (15) and the end cover (16). The second intermediate connecting plate (15) is placed between the side ring plate (11) and the magnetic medium box (5), and the transmission shaft (2) is inserted into the second intermediate connecting plate (15), and the end of the magnetic medium box (5) away from the transmission shaft (2) is rotatably connected to the end cover (16).
6. The center rotating ring structure according to claim 5, characterized in that: A plurality of mounting grooves (6) corresponding one to one with the transmission shafts (2) are provided in a circumferential array on the side of the edge ring plate (11), and one end of the transmission shaft (2) is rotatably connected to the mounting groove (6) via a bearing.
7. The center rotating ring structure according to claim 1, characterized in that: The transmission wheel (31) and the transmission belt (32) are both multi-V belt wheels and multi-V belts, respectively.
8. The center rotating ring structure according to claim 1, characterized in that: The rotating disk (1), the transmission shaft (2), the transmission wheel (31), the transmission belt (32), the power transmission component and the driving component are all made of non-magnetic conductive materials.