Vertical ring pulsating high-gradient magnetic separator

Abstract

The invention belongs to the technical field of magnetic separation equipment, and particularly relates to a vertical ring pulsating high-gradient magnetic separator which comprises a background magnetic field generation system and a magnetic force conversion unit arranged in the background magnetic field generation system, and the magnetic force conversion unit comprises a central swivel assembly, a magnetic gathering medium box and a driving unit. The center rotating ring assembly comprises a center rotating disc and a plurality of transmission shafts, the multiple transmission shafts are distributed on one side of the center rotating disc in a circumferential array mode, the multiple magnetism gathering medium boxes comprise side plates, fixing ribs and magnetism gathering medium rods made of magnetic materials, the two side plates are oppositely arranged, and the multiple fixing ribs and the multiple magnetism gathering medium rods which are arranged in a staggered mode are distributed between the two side plates; the driving unit comprises a first driving part and a second driving part, the first driving part is used for achieving revolution of the multiple magnetism gathering medium boxes, and the second driving part is used for achieving autorotation of the multiple magnetism gathering medium boxes. The device can effectively reduce mechanical inclusions and inclusions of magnetic products in the high-intensity magnetic separation process, the purity of the magnetic products is improved, and the separation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic separation equipment, and in particular relates to a vertical ring pulsating high gradient magnetic separator. Background Art

[0002] High gradient magnetic separation is one of the key technologies for achieving efficient separation of weakly magnetic minerals. Vertical ring pulsating high gradient magnetic separators are widely used in the separation of hematite, ilmenite, and non-metallic minerals for iron removal. The magnetic field used by high gradient magnetic separation equipment to separate weakly magnetic minerals is mainly composed of background magnetic field and induced magnetic field. The background magnetic field is a uniform magnetic field generated by the combination of excitation coils and iron armor, and can currently reach up to about 1.8T. The induced magnetic field is the core of high gradient magnetic separation equipment to capture weakly magnetic minerals. It is generated by placing a magnetic medium made of magnetic conductive stainless steel in the background magnetic field, and its surface magnetic field strength can reach up to 10 5 T / m, the magnetic induction intensity is much greater than the background magnetic induction intensity.

[0003] 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.

[0004] However, mineral particles in a vertical ring high-gradient magnetic separator are subject not only to fluid drag and magnetic forces, but also to various surface forces, such as van der Waals molecular forces and double-layer electrostatic forces. Research has shown that contact between minerals and the magnetic medium during high-gradient magnetic separation is primarily determined by the mechanical mechanism of particle collision. Nearly 100% of the particles in the slurry will come into contact with and collide with the magnetic medium. Therefore, mechanical inclusion of non-magnetic and magnetic particles during separation is almost inevitable, leading to serious non-selective agglomeration phenomena such as entrainment and inclusion between mineral particles in the system, reducing the selectivity of high-gradient magnetic separation. This is primarily due to two factors: first, the magnetic components in the gangue minerals cause them to be captured by the magnetic medium due to magnetic forces; second, non-magnetic gangue mineral particles are mixed into the particle clusters on the surface of the magnetic medium due to mechanical inclusion. Research has shown that non-magnetic gangue particles are difficult to attract by smooth magnetic concentrators. However, once a certain number of magnetic particles are trapped on the surface of the concentrator, some gangue particles can be retained on these surfaces. Some extremely fine gangue particles may even penetrate the deposit. The former is due to weak interaction between the particles and the medium, while the latter is due to enhanced interaction between the particles.

[0005] The research results show that when the magnetic medium is in a background magnetic field, mechanical capture is obvious, the selectivity of the magnetic medium is reduced, and inclusion blockage is easily caused. In addition, the degree of inclusion on the side of the medium close to the feeding direction is more serious than on the other side, affecting production efficiency and resulting in a decrease in the purity of the magnetic product. In most cases, the magnetic concentrate cannot be used as the final product and still needs further processing, which prolongs the sorting process and significantly increases production costs. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a vertical ring pulsating high gradient magnetic separator, which can effectively improve the selectivity and adaptability of magnetic mineral particles, reduce mechanical inclusions and inclusions of magnetic products in the magnetic separation process, improve the purity of magnetic products, improve the sorting efficiency, effectively shorten the subsequent processing process of magnetic products, and reduce production costs.

[0007] The technical solution of the present invention is: A vertical ring pulsating high gradient magnetic separator includes a background magnetic field generating system and a magnetic force conversion unit arranged in the background magnetic field generating system, wherein the magnetic force conversion unit includes: The invention comprises a background magnetic field generating system and a magnetic force conversion unit arranged in the background magnetic field generating system, wherein the magnetic force conversion unit comprises: A central rotating ring assembly includes a central rotating disk made of non-magnetic material and a plurality of transmission shafts, wherein the plurality of transmission shafts are distributed in a circular array on one side of the central rotating disk, and the transmission shafts are rotatably connected to the central rotating disk; A plurality of magnetic concentrating medium boxes, corresponding one to one with the plurality of transmission shafts, one end of each magnetic concentrating medium box being fixedly connected to the corresponding transmission shaft, and a plurality of magnetic concentrating medium rods being contained in each magnetic concentrating medium box; The driving unit includes a first driving part and a second driving part, wherein the output end of the first driving part is connected to the central turntable, and is used to drive the central turntable to rotate so as to realize the revolution of the plurality of magnetic concentrating medium boxes; the output end of the second driving part is connected to the plurality of transmission shafts, and is used to realize the rotation of the plurality of magnetic concentrating medium boxes; When in use, the angle between the axial direction of the magnetic concentrating medium rod and the magnetic field direction generated by the background magnetic field generating system is periodically changed from 0° to 360° through the revolution and rotation of the magnetic concentrating medium box.

[0008] Preferably, the second driving unit includes: A plurality of transmission wheels and transmission belts, wherein the plurality of transmission wheels correspond one to one with 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; At least one electric drum, the output shaft of the electric drum is coaxially fixedly connected to one of the transmission wheels, and is used to realize the self-rotation of the multiple transmission wheels under the cooperation of multiple transmission belts.

[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 central turntable, and a plurality of the magnetic medium boxes are arranged between two adjacent electric rollers.

[0010] Preferably, the second driving unit includes: A plurality of planetary gears corresponding to the plurality of magnetic medium boxes one by one, each of the magnetic medium boxes being fixedly connected to a rear axle on a side away from the central turntable, and each of the rear axles being fitted with one of the planetary gears; The gear ring is arranged on a side of the magnetic medium box away from the central turntable, and the plurality of planetary gears are placed in the gear ring and meshed with the gear ring.

[0011] Preferably, a plurality of mounting holes are provided in a circumferential array on the side of the center disk, and the plurality of mounting holes correspond one-to-one to the plurality of transmission shafts. One end of the transmission shaft is inserted into the mounting hole and the two are rotatably connected via a bearing.

[0012] Preferably, the first driving part includes a rotary driver and a rotating shaft, the central turntable is mounted on the rotating shaft, and the output shaft of the rotary driver is fixedly connected to the rotating shaft for driving the central turntable to rotate.

[0013] Preferably, the magnetic medium box includes side plates made of non-magnetic material, fixing ribs and magnetic medium rods made of magnetic material. Two side plates are arranged opposite to each other, and the two side plates are coaxially arranged discs. The axis of the side plate coincides with the axis of the rear axle. Multiple magnetic medium rods are distributed between the two side plates, and the magnetic medium rods are fixed to the side plates through the fixing ribs.

[0014] Preferably, the transmission wheel and the transmission belt are both multi-V belt wheels and multi-V belts respectively.

[0015] Compared with the prior art, the vertical ring pulsating high gradient magnetic separator of the present invention has the following beneficial effects: The present invention can realize the synchronous revolution and rotation of the magnetic medium box in the background magnetic field generating system through the cooperation of the first driving part and the second driving part, so that the angle between the axial direction of the magnetic medium rod in the magnetic medium box and the background magnetic field direction generated by the background magnetic field generating system can be periodically transformed from 0° to 360°, that is, the magnetic medium rod and the background magnetic field direction can realize the alternating conversion movement between perpendicular and parallel. When the axial direction of the magnetic medium rod is perpendicular to the background magnetic field direction, the magnetic force on the mineral particles is the largest, and when the axial direction of the magnetic medium rod is parallel to the background magnetic field direction, the magnetic force on the mineral particles is the smallest, so that the magnetic force on the mineral particles on the surface of the magnetic medium box is the smallest. The force produces a periodic change of strong-weak-strong, which can make the magnetic mineral particles subject to a periodic force law similar to "agglomeration-dispersion-agglomeration" under the action of magnetic force. Through multiple alternating operations of agglomeration and dispersion, the non-magnetic gangue mineral particles are fully separated from the particle clusters on the surface of the magnetic medium box, effectively overcoming the defects of existing magnetic separation equipment, improving the selectivity of the separation process, and 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 magnetic products, improving separation efficiency, effectively shortening the subsequent processing process of magnetic products, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the three-dimensional structure of a vertical ring pulsating high gradient magnetic separator according to an embodiment of the present invention; Figure 2 A top view of a vertical ring pulsating high gradient magnetic separator according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the rotating ring structure in an embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the transfer ring structure in the AA direction; Figure 5 Schematic diagram of the structure of the second driving unit in an embodiment of the present invention; Figure 6 Schematic diagram of the installation of the transmission belt and transmission wheel in the embodiment of the present invention Figure 7 This is a schematic diagram of the installation of the electric drum in an embodiment of the present invention; Figure 8 Schematic diagram of the structure of the driving magnetic medium box in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Center swivel assembly; 11. Center turntable; 12. Drive shaft; 2. Magnetic medium box; 21. Magnetic medium rod; 22. Side plate; 23. Fixed rib; 3. First drive unit; 4. Second drive unit; 41. Drive wheel; 42. Drive belt; 43. Electric roller. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] See also Figures 1 to 8 As shown, in order to effectively improve the selectivity and adaptability of magnetic mineral particles, reduce mechanical inclusions and inclusions of magnetic products during strong 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 vertical ring pulsating high-gradient magnetic separator including a frame, a pulsating mechanism, a tailings box, an iron armor, an excitation coil, a sorting trough, a magnetic conversion unit, an ore 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. Among them, the pulsating mechanism and the pulsating mechanism driving device are connected to the tailings box; the iron armor, excitation coil and coil cooling assembly together constitute the background magnetic field generating system of the vertical ring pulsating high gradient magnetic separator; the sorting trough, magnetic conversion unit, liquid level adjustment device, and flushing water trough form the sorting area of ​​the vertical ring pulsating high gradient magnetic separator; the feeding trough, unloading structure, concentrate trough, and tailings box are the material feeding and product output structures of the vertical ring pulsating high gradient magnetic separator; the frame is the support body of all structures, and the magnetic field control parameters, pulsation parameters, and rotating ring rotation parameters of the vertical ring magnetic separator can be adjusted through the control system of the whole machine.

[0022] The magnetic force conversion unit is installed within the background magnetic field generation system and includes a central rotating ring assembly 1, a magnetic medium box 2, and a drive unit. The central rotating ring assembly 1 is entirely made of non-magnetic material and includes a central turntable 11 and multiple drive shafts 12. The multiple drive shafts 12 are arranged in a circular array on one side of the central turntable 11 and are rotatably connected to the central turntable 11. A central transparent cover is also provided on one side of the central turntable 11, corresponding to each of the multiple magnetic medium boxes 2. The central transparent cover is mounted on the magnetic medium boxes 2. The magnetic medium box 2 includes side plates 22 made of non-magnetic material, fixing ribs 23, and magnetic medium rods 21 made of magnetic material. Two side plates 22 are arranged opposite each other, and the two side plates 22 are coaxially arranged circular discs. A plurality of staggered fixing ribs 23 and magnetic medium rods 21 are distributed between the two side plates 22. The fixing ribs 23 are parallel to the axis of the side plates 22, and the two ends of the fixing ribs 23 are fixed to the two side plates 22 respectively, and the magnetic medium rods 21 are fixed perpendicularly to the fixing ribs 23. The front axle is coaxially fixed to the side wall of one of the side plates 22 facing away from the fixing ribs 23, and the rear axle is coaxially fixed to the side of the other side plate 22 facing away from the fixing ribs 23. The front axle is coaxially fixed to one of the transmission shafts 12. The driving unit includes a first driving part 3 and a second driving part 4. The output end of the first driving part 3 is connected to the central turntable 11, and is used to drive the central turntable 11 to rotate to drive the multiple magnetic medium boxes 2 to realize revolution. The output end of the second driving part 4 is connected to multiple transmission shafts 12, and is used to realize the rotation of the multiple magnetic medium boxes 2. In order to improve the sorting efficiency, Figure 2 As shown, the vertical ring pulsating high-gradient magnetic separator is symmetrically equipped with two sets of magnetic force conversion units, and the central turntables 11 in the two magnetic force conversion units use the same first drive unit 3. During the revolution and rotation of the magnetic medium box 2, the axial direction of the magnetic medium rod 21 forms a periodic angle between 0° and 360° with the direction of the background magnetic field generated by the background magnetic field generating system. In other words, the axial direction of the magnetic medium rod 21 and the direction of the magnetic field generated by the background magnetic field generating system periodically switch between being parallel and perpendicular.

[0023] Preferably, the first driving part 3 includes a rotary driver and a rotating shaft. The rotary driver should adopt a servo motor. The rotating shaft and the rotary driver are fixed coaxially, and the center turntable 11 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 2.

[0024] Furthermore, in order to realize the rotation of the multiple magnetic medium boxes 2 while the first driving unit 3 drives the central turntable 11 to rotate and drive the multiple magnetic medium boxes 2 to realize revolution, the second driving unit 4 can adopt at least the following two design schemes: First, see Figures 3 to 7As shown, the second drive unit 4 includes: multiple transmission wheels 41, transmission belts 42, and one or more electric rollers 43. The multiple transmission wheels 41 correspond one-to-one to the multiple transmission shafts 12. The transmission wheels 41 are fixedly mounted on the transmission shafts 12, and two adjacent transmission wheels 41 are connected by transmission belts 42. To ensure the transmission effect, the transmission wheels 41 and transmission belts 42 are respectively multi-V belt pulleys and multi-V belts. When a single electric roller 43 is used, the output shaft of the electric roller 43 is coaxially connected to one of the transmission wheels 41, and the remaining transmission shafts 12 are each provided with a magnetic medium box 2, and the transmission shaft 12 is fixedly connected to the front axle of the magnetic medium box 2. Therefore, through the drive of the electric roller 43, the multiple transmission wheels 41 and the multiple transmission belts 42 cooperate to achieve the self-rotation of the multiple transmission wheels 41 with their respective magnetic medium boxes 2. When multiple electric rollers 43 are used, they are arranged in a circular array on one side of the central turntable 11. Multiple magnetic medium boxes 2 are placed between adjacent electric rollers 43. The output ends of the multiple electric rollers 43 are each connected to a drive shaft 12, and all electric rollers 43 must have the same transmission direction. Preferably, six to ten magnetic medium boxes 2 are placed between adjacent electric rollers 43.

[0025] Secondly, the second drive unit 4 can also include a combination of multiple planetary gears and ring gears, but the ability of the combination of planetary gears and ring gears to achieve the self-rotation of multiple magnetic medium boxes 2 is a passive transmission. Specifically, the multiple planetary gears correspond one-to-one to the multiple magnetic medium boxes 2, and a planetary gear is mounted on the rear axle of each magnetic medium box 2; the multiple planetary gears are placed in the ring gear and meshed with the ring gear, thereby fixing the ring gear to the frame of the vertical ring pulsating high-gradient magnetic separator. To ensure the stability of the transmission, a sun gear is also provided in the ring gear, so that all the planetary gears are placed between the sun gear and the ring gear, the planetary gears mesh with the sun gear, and the sun gear is rotationally connected to the frame. In this way, when the central turntable 11 drives the multiple magnetic medium boxes 2 to revolve, the self-rotation of the magnetic medium boxes 2 can also be achieved with the cooperation of the planetary gears, ring gear, and sun gear.

[0026] See also Figure 4As shown, in order to ensure the stable rotation and revolution of the magnetic medium box 2 and improve the sorting effect, the central turntable 11 includes an edge ring plate, an intermediate connecting plate, a central disk, an intermediate rib plate, an intermediate connecting plate and an end cover. The edge ring plate is mounted on the central disk and the two are fixedly connected by the intermediate connecting plate. A plurality of mounting holes are arranged in a circumferential array on the edge ring plate. A plurality of transmission shafts 12 are arranged in a circumferential array on the edge ring plate and are rotatably connected to the corresponding mounting holes through bearings. The intermediate connecting plate and the end cover are relatively arranged on the side of the edge ring plate facing the transmission shaft 12. The intermediate connecting plate is fixedly connected to the edge ring plate. The end cover is fixedly connected to the intermediate connecting plate through a plurality of intermediate rib plates. The plurality of magnetic medium boxes 2 and the electric roller 43 are all arranged between the intermediate connecting plate and the end cover. The intermediate connecting plate and the end cover are respectively mounted on the front axle and the rear axle of the magnetic medium box 2.

[0027] Furthermore, in order to improve the sorting effect and ensure that the magnetic medium rod 21 realizes the alternating conversion between parallel and perpendicular to the background magnetic field direction during the revolution and rotation of the magnetic medium box 2, the magnetic medium box 2 has the following two structures: First, the magnetic medium box 2 includes side plates 22 made of non-magnetic material, fixed ribs 23, and magnetic medium rods 21 made of magnetic material. Two side plates 22 are arranged opposite each other, and the two side plates 22 are coaxially arranged discs. A plurality of staggered fixed ribs 23 and magnetic medium rods 21 are distributed between the two side plates 22. The fixed ribs 23 are perpendicular to the axis of the side plates 22, and the two ends of the fixed ribs 23 are fixed to the two side plates 22 respectively, and the magnetic medium rods 21 are fixed perpendicularly to the fixed ribs 23. The front axle is coaxially fixed to the side wall of one of the side plates 22 away from the fixed ribs 23, and the rear axle is coaxially fixed to the side of the other side plate 22 away from the fixed ribs 23. The front axle is coaxially fixed to one of the transmission shafts 12. Specifically, the magnetic concentrating dielectric rods 21 are parallel to the side plates 22, and the fixing ribs 23 are perpendicular to the side plates 22. Multiple magnetic concentrating dielectric rods 21 are arranged in groups at equal intervals along the axis of the fixing ribs 23. The magnetic concentrating dielectric rods 21 in each group are distributed at equal intervals on either side of the axis of the side plates 22. The length of the magnetic concentrating dielectric rods 21 in the same group gradually decreases from the axis of the side plates 22 toward either side, and each magnetic concentrating dielectric rod 21 is fixedly connected to a fixing rib 23 at each end. The diameter of the magnetic concentrating dielectric rods 21 is generally set to 1 mm to 5 mm, the distance between adjacent fixing ribs 23 is set to 50 mm to 100 mm, and the diameter of the fixing ribs 23 is set to 5 mm to 10 mm.

[0028] Secondly, in addition to the side plates 22 made of non-magnetic material, the fixing ribs 23, and the magnetic rods 21 made of magnetic material, the magnetic medium box 2 also includes a central main shaft. The two ends of the central main shaft are respectively fixedly connected to the two side plates 22, and the central main shaft and the side plates 22 are coaxial. A plurality of fixing ribs 23 are arranged in a circular array around the central main shaft. A plurality of magnetic medium rods 21 are arranged between each fixing rib 23 and the central main shaft along the axis of the central main shaft. One end of the magnetic medium rod 21 is fixedly connected to the fixing rib 23 vertically, and the other end is vertically inserted into the reserved hole on the side wall of the central main shaft. The diameter of the magnetic medium rod 21 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 21 and the depth is 5mm to 8mm. The spacing between two adjacent reserved holes is 2 to 3 times the diameter of the magnetic medium rod 21. The distance between two adjacent fixing ribs 23 is 50 mm to 100 mm, and the diameter of the fixing rib 23 is 5 mm to 10 mm.

[0029] The implementation principle of this device: When sorting mineral particles, the first driving unit 3 is used to drive the central turntable 11 to rotate, and the second driving unit 4 is used to drive the multiple transmission shafts 12 to rotate, so as to realize the synchronous revolution and rotation of the magnetic medium box 2 in the background magnetic field generating system, so that the magnetic medium rod 21 in the magnetic medium box 2 forms an alternating conversion motion between vertical and parallel to the background magnetic field direction generated by the background magnetic field generating system (that is, the angle between the axial direction of the magnetic medium rod 21 and the background magnetic field direction continuously and periodically changes between 0° and 360°), that is, the axial direction of the magnetic medium rod 21 and the background magnetic field direction produce a "vertical-parallel-vertical" periodic motion, so that the induced magnetic field on the surface of the magnetic medium rod 21 produces a periodic "strong-weak-strong" change. When the axis of the magnetic medium box 2 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 2 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 inclusions of magnetic products during strong magnetic separation, improving the purity of magnetic products, improving separation efficiency, effectively shortening the subsequent processing of magnetic products, and reducing production costs. In addition, when the magnetic medium box 2 carries weak magnetic minerals to the top of the magnetic separator to unload the ore, the rotating magnetic medium box 2 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 21, and on the other hand, increasing the rotation speed of the central turntable 11, thereby increasing the effective processing capacity of the magnetic separator.

[0030] 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 is -0.074 mm, accounting for 83% and a TFe grade of 35.45%. The main useful minerals are strongly magnetic magnetite and weakly magnetic hematite, with magnetite accounting for 12% of the iron ore. The main gangue mineral is non-magnetic quartz, and the degree of dissociation between the iron-bearing minerals and the gangue minerals is 93.55%. In a conventional separation process, a drum magnetic separator with a magnetic field strength of 2400 Gs is first used to separate the strongly magnetic minerals. The concentrate has a TFe grade of 52.33% and the tailings has a TFe grade of 29.82%. The tailings from the weak magnetic separation are then subjected to strong magnetic separation using an existing magnetic separator. The background magnetic induction intensity is 1.0 T, the diameter of the magnetic rod 21 is 2 mm, and the rotating ring speed is 5 r / min. The TFe grades of the strongly magnetic concentrate and tailings are 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%.

[0031] 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 21 is 2mm, the speed of the central turntable 11 is 5r / min, and the rotation speed of the magnetic medium box 2 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.

[0032] When directly sorting raw material with a TFe grade of 35.45%, the background magnetic induction intensity is 1.0T, the diameter of the magnetic medium rod 21 is 2mm, the speed of the central turntable 11 is 4r / min, and the rotation speed of the magnetic medium box 2 is 15r / min. A single-stage sorting process can produce a mixed iron concentrate with a TFe grade of 50.65%, an increase of 4.61 percentage points 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.

[0033] 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 vertical ring pulsating high gradient magnetic separator, comprising a background magnetic field generating system and a magnetic force conversion unit arranged in the background magnetic field generating system, characterized in that: The magnetic force conversion unit includes: A central rotating ring assembly (1) comprises a central rotating disk (11) and a plurality of transmission shafts (12), wherein the plurality of transmission shafts (12) are distributed in a circumferential array on one side of the central rotating disk (11), and the transmission shafts (12) are rotatably connected to the central rotating disk (11); A plurality of magnetic medium boxes (2) corresponding one to one with the plurality of transmission shafts (12); one end of the magnetic medium box (2) is fixedly connected to the corresponding transmission shaft (12); and a plurality of magnetic medium rods (21) are provided in the magnetic medium box (2); The driving unit comprises a first driving part (3) and a second driving part (4), wherein the output end of the first driving part (3) is connected to the central turntable (11) and is used to drive the central turntable (11) to drive the plurality of magnetic medium boxes (2) to realize revolution around the axis of the central turntable (11), and the output end of the second driving part (4) is connected to the plurality of transmission shafts (12) and is used to realize the self-rotation of the plurality of magnetic medium boxes (2); When in use, the angle between the axial direction of the magnetic medium rod (21) and the magnetic field direction generated by the background magnetic field generating system is periodically transformed from 0° to 360° through the revolution and rotation of the magnetic medium box (2).

2. A vertical ring pulsating high gradient magnetic separator according to claim 1, characterized in that: The second driving unit (4) comprises: A plurality of transmission wheels (41) and transmission belts (42), wherein the plurality of transmission wheels (41) correspond one to one with the plurality of transmission shafts (12), the transmission wheels (41) are fixed on the transmission shafts (12), and two adjacent transmission wheels (41) are connected via transmission belts (42); At least one electric roller (43), the output shaft of the electric roller (43) being coaxially fixedly connected to one of the transmission wheels (41), and being used to realize the self-rotation of the plurality of transmission wheels (41) in cooperation with the plurality of transmission belts (42).

3. A vertical ring pulsating high gradient magnetic separator according to claim 2, characterized in that: A plurality of the electric rollers (43) are provided, and the plurality of the electric rollers (43) are arranged in a circumferential array on one side of the central turntable (11), and a plurality of the magnetic medium boxes (2) are arranged between two adjacent electric rollers (43).

4. A vertical ring pulsating high gradient magnetic separator according to claim 1, characterized in that: The second driving unit (4) comprises: A plurality of planetary gears corresponding one to one with the plurality of magnetic medium boxes (2); a rear axle is fixedly connected to a side of each magnetic medium box (2) away from the central turntable (11); and a planetary gear is mounted on each rear axle; A gear ring is arranged on a side of the magnetic medium box (2) away from the central turntable (11), and a plurality of planetary gears are placed in the gear ring and meshed with the gear ring.

5. The vertical ring pulsating high gradient magnetic separator according to claim 1, characterized in that: A plurality of mounting holes are provided in a circumferential array on the side of the central turntable (11), and the plurality of mounting holes correspond one-to-one to the plurality of transmission shafts (12). One end of the transmission shaft (12) is inserted into the mounting hole, and the two are rotatably connected via a bearing.

6. The vertical ring pulsating high gradient magnetic separator according to claim 1, characterized in that: The first driving part (3) comprises a rotary driver and a rotating shaft, the central rotating disk (11) is sleeved on the rotating shaft, and the output shaft of the rotary driver is fixedly connected to the rotating shaft for driving the central rotating disk (11) to rotate.

7. The vertical ring pulsating high gradient magnetic separator according to claim 4, characterized in that: The magnetic medium box (2) includes a side plate (22) made of non-magnetic material, a fixing rib (23) and a magnetic medium rod (21) made of magnetic material. Two side plates (22) are arranged opposite to each other. The two side plates (22) are coaxially arranged discs, and the axis of the side plate (22) coincides with the axis of the rear axle. A plurality of magnetic medium rods (21) are distributed between the two side plates (22), and the magnetic medium rods (21) are fixed to the side plates (22) through the fixing rib (23).

8. The vertical ring pulsating high gradient magnetic separator according to claim 2, characterized in that: The transmission wheel (41) and the transmission belt (42) are both multi-V belt wheels and multi-V belts, respectively.

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