Magnetic medium gathering box

Abstract

The invention belongs to the technical field of magnetic separation equipment, and particularly relates to a magnetism gathering medium box which is composed of side plates, magnetism gathering medium rods, fixing ribs and a driving assembly. The number of the side plates is two, and the two side plates are oppositely arranged in a disc shape. The plurality of magnetism gathering medium rods are fixedly mounted between the two side plates through the fixing ribs respectively; the output end of the driving assembly is connected with the side plate and used for indirectly driving the multiple magnetism gathering medium rods to rotate around the rotating axis of the side plate by driving the side plate to rotate. During use, the magnetism gathering medium box is used for being placed in a background magnetic field, and the driving assembly drives the two side plates and the magnetism gathering medium rods between the two side plates to rotate together so that the included angle between the axial direction of the magnetism gathering medium rods and the direction of the background magnetic field can be periodically changed from 0 degree to 360 degrees. The device can effectively reduce mechanical inclusions and magnetic product inclusions in the high-intensity magnetic separation process, improve the purity of magnetic products, improve the separation efficiency, shorten the subsequent treatment process of the magnetic products and reduce the production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic separation equipment, and in particular relates to a magnetic medium box. Background Art

[0002] Magnetic separation technology is used in over 90% of my country's iron ore production processes. It boasts environmentally friendly, pollution-free operation, simple processes, and high separation efficiency. To address the separation of low-grade, fine-grained, and weakly magnetic paramagnetic minerals, a combination of Marston coils and concentrated magnetic media has been employed to generate high magnetic induction intensity and magnetic field gradients, leading to the rapid development of high-gradient magnetic separation technology.

[0003] At present, the magnetic field of electromagnetic high-gradient magnetic separation equipment 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 coil 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 mainly exists in the background magnetic field in the form of a magnetic medium box. The magnetic medium rods in the magnetic medium box are currently mostly made of magnetic conductive stainless steel. The axial direction of the magnetic medium rod is perpendicular to the direction of the magnetic field lines of the background magnetic field. The generated magnetic induction intensity is fixed and about 1.5 to 2 times the background magnetic induction intensity. At the same time, the magnetic field gradient on the surface of the magnetic medium rod can reach up to 10 5 T / m.

[0004] In practical applications, the magnetic medium box is used in the vertical ring high gradient magnetic separator. Since the contact between the minerals and the magnetic medium box during the high gradient magnetic separation process is mainly determined by the mechanical mechanism of particle collision, almost all particles in the slurry will come into contact with and collide with the magnetic medium box. This makes it almost inevitable that the mechanical inclusions of non-magnetic particles and magnetic particles will pass through the magnetic medium box during the separation process. In this way, since the axial direction of the magnetic medium rod in the magnetic medium box is perpendicular to the direction of the magnetic lines of force of the background magnetic field and remains fixed, when a certain number of magnetic particles are captured on the surface of the magnetic medium box, some gangue can be retained on the surface of these magnetic particles. Some gangue with particularly fine particle size may even enter the accumulation through penetration, resulting in the phenomenon of non-selective agglomeration such as entrainment and inclusion between mineral particles during the magnetic separation process. 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 magnetic medium box, which can rotate itself in the background magnetic field to achieve the axial direction of the magnetic medium rod being able to periodically change the angle with the magnetic lines of force of the background magnetic field, so that the magnetic induction intensity around the magnetic medium box continuously changes in strength, thereby effectively reducing entrainment and inclusion between mineral particles during the magnetic separation process.

[0006] The technical solution of the present invention is: A magnetic medium box, comprising: Two side panels, set opposite to each other; A plurality of magnetic medium rods are fixedly installed between the two side plates through fixing ribs; A driving component, the output end of which is connected to the side plate or the magnetic medium rod or the side plate and the magnetic medium rod, and is used to drive the side plate and the plurality of magnetic medium rods to rotate together; When in use, the magnetic medium box is used to be placed in the background magnetic field, and the driving component drives the two side plates and the multiple magnetic medium rods between the two side plates to rotate, so as to realize the periodic transformation of the angle between the axial direction of the magnetic medium rod and the background magnetic field direction from 0° to 360°.

[0007] Preferably, the driving assembly includes an electric roller, which is made of non-magnetic material. The electric roller has a front shaft, a rear shaft and a rotating outer cylinder. The two side plates are mounted on the outer cylinder. The front shaft and the rear shaft are used to be fixed to the magnetic separator body, and the magnetic medium rod is arranged on the peripheral side of the outer cylinder.

[0008] Preferably, a plurality of circular arrays of the fixing ribs are distributed on the circumference of the outer shaft, and the fixing ribs are parallel to the outer cylinder, the two ends of the fixing ribs are vertically fixed on two side plates, the magnetic medium rod is perpendicular to the outer cylinder, one end of the magnetic medium rod is fixed to the fixing rib, and the other end is inserted into the reserved hole on the side wall of the outer cylinder, and the magnetic medium rod is fixed to the outer cylinder.

[0009] Preferably, the diameter of the magnetic medium rod is 1mm~5mm, the diameter of the reserved hole is 1.2 times~1.5 times larger than the diameter of the magnetic medium rod, the depth is 5mm~8mm, and the spacing between two adjacent reserved holes is 2 times~3 times the diameter of the magnetic medium rod.

[0010] Preferably, the drive assembly includes: Two connecting shafts are respectively fixed on the side walls of the two side plates, wherein one of the connecting shafts is used for rotationally connecting to the magnetic separator body; A driven gear, mounted on the other connecting shaft; a transmission gear, meshing with the driven gear; The rotary driver is used to be fixed on the magnetic separator body, and the output shaft of the rotary driver is connected to the transmission gear to drive the transmission gear to rotate.

[0011] Preferably, the transmission gear includes a ring gear having internal teeth, the driven gear is placed on the inner side of the ring gear and meshes with the internal teeth of the ring gear, the ring gear is used to be rotatably connected to the magnetic separator body, the ring gear is fixed to the output shaft of the rotary drive through a connecting rod, and the ring gear is coaxial with the output shaft of the rotary drive.

[0012] Preferably, the transmission gear includes a central gear having external teeth, the central gear is sleeved on the output shaft of the rotary driver, and the driven gear is meshed with the external teeth of the central gear.

[0013] Preferably, the side plate is disc-shaped, and the multiple magnetic medium rods are divided into multiple groups. The multiple magnetic medium rods in each group are linearly distributed along a direction perpendicular to the axis of the side plate, and the length of each group of multiple magnetic medium rods gradually shortens toward both sides with the axis of the side plate as the center, and each group of multiple magnetic medium rods is fixed with multiple fixed ribs to form a network.

[0014] Preferably, the distance between two adjacent fixing ribs is 50 mm to 100 mm, and the diameter of the fixing rib is 5 mm to 10 mm.

[0015] Compared with the prior art, the magnetic medium box of the present invention has the following beneficial effects: The magnetic medium box provided by the present invention can drive the side plates, fixed ribs and the magnetic medium rod to rotate as a whole in the background magnetic field through the driving component, so that the axial direction of the magnetic medium rod in the magnetic medium box and the magnetic field direction of the background magnetic field form a periodic continuous rotation of 0°~360°, that is, the magnetic medium rod and the background magnetic field direction are continuously operated in an alternating motion perpendicular to and parallel to each other, so that 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 strong-weak-strong periodic change can make the magnetic mineral particles be subjected 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 A longitudinal sectional view of a first structural composition of a magnetic concentrating medium box according to an embodiment of the present invention; Figure 2 A cross-sectional schematic diagram of a first structural composition of a magnetic concentrating medium box according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of an electric drum in an embodiment of the present invention; Figure 4 A longitudinal sectional view of a second structural composition of a magnetic concentrating medium box according to an embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the second structural composition of the magnetic medium box in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Side plate; 2. Magnetic medium rod; 3. Fixed rib; 4. Electric roller; 41. Front axle; 42. Rear axle; 43. Outer cylinder; 5. Reserved hole; 6. Connecting shaft; 7. Driven gear. 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] With the rapid development of high-gradient magnetic separation technology, researchers at home and abroad have developed continuous flat-ring high-gradient magnetic separators, primarily the Jones and Sala types. These utilize toothed plate and mesh media, respectively, as magnetic product capture structures to enhance the medium's capture capacity for fine-grained, weakly magnetic minerals and improve the frequency of cyclic loading. However, frequent clogging of the medium due to magnetic and mechanical inclusions has become a major factor influencing separation performance. Currently, the most widely used high-gradient magnetic separation equipment is the electromagnetic vertical-ring high-gradient magnetic separator, introduced in a report presented at the 15th International Mineral Processing Conference in 1985. This technology utilizes a magnetic backwashing method to effectively alleviate the clogging problem of the magnetic media. Subsequently, researchers applied pulsation devices to electromagnetic vertical-ring high-gradient magnetic separation. The resulting vertical-ring pulsating high-gradient magnetic separation technology laid the foundation for efficient magnetic separation of weakly magnetic minerals in my country and has found widespread application in weakly magnetic mineral separation, iron removal from non-metallic ores, and purification of nonferrous and rare metal ores.

[0022] The existing vertical ring 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, an ore 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 magnetic medium box, the liquid level adjustment device, and the flushing water trough form the sorting area of ​​the vertical ring pulsating high-gradient magnetic separator; the ore 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 these structures, and the magnetic field control parameters and pulsation parameters of the vertical ring magnetic separator can be adjusted through the control system of the entire machine.

[0023] 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.

[0024] When the magnetic medium box is in the background magnetic field, the mechanical capture phenomenon is obvious, the selectivity of the magnetic medium box is reduced, and it is easy to cause inclusion blockage. In addition, the degree of inclusion on the side of the medium close to the feeding direction is more serious than 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 greatly increases production costs.

[0025] See also Figures 1 to 5 As shown, in order to effectively improve the selectivity and adaptability of magnetic mineral particles, reduce mechanical inclusions and magnetic product inclusions in the strong magnetic separation process, improve the purity of magnetic products, improve the sorting efficiency, effectively shorten the subsequent processing of magnetic products, and reduce production costs. This embodiment provides a magnetic medium box, which is arranged in the background magnetic field generating system in the vertical ring high gradient magnetic separator. The magnetic medium box in this application is mainly composed of side plates 1, magnetic medium rods 2, fixed ribs 3 and a driving assembly. Specifically, the side plates 1 include two and are made of non-magnetic material, and the two side plates 1 are arranged opposite to each other in a disc shape; a plurality of magnetic medium rods 2 are respectively fixedly installed between the two side plates 1 through fixed ribs 3; the output end of the driving assembly is connected to the two side plates 1 and the plurality of magnetic medium rods 2. When in use, the magnetic medium box is in the background magnetic field, and the driving component drives the two side plates 1 and multiple magnetic medium rods 2 to rotate counterclockwise, that is, the magnetic medium box rotates in the background magnetic field, and the angle between the axial direction of the magnetic medium rods 2 and the direction of the background magnetic field forms a periodic change of 0°~360°.

[0026] Furthermore, in order to achieve a periodic transformation of the angle between the axial direction of the magnetic focusing medium rod 2 and the background magnetic field direction from 0° to 360°, the specific structure of the magnetic focusing medium rod 2, the fixing rib 3 and the driving assembly includes at least the following two structural combinations: First, see Figures 1 to 3 As shown, the drive assembly includes a motorized drum 4 made of a non-magnetic material. The motorized drum 4 has a front axle 41, a rear axle 42, and a rotatable outer cylinder 43. Two side plates 1 are sleeved onto the outer cylinder 43. The front axle 41 and rear axle 42 are used to secure the drum to the magnetic separator body. A magnetic concentrating medium rod 2 is disposed around the outer cylinder 43. Based on the drive design of the motorized drum 4, a plurality of fixing ribs 3 are arranged in a circular array around the outer cylinder 43. The fixing ribs 3 are parallel to the outer cylinder 43, with both ends of the fixing ribs 3 perpendicularly fixed to the two side plates 1. The magnetic concentrating medium rod 2 is perpendicular to the outer cylinder 43, with one end of the magnetic concentrating medium rod 2 fixed to the fixing rib 3. Furthermore, the magnetic concentrating medium rod 2 can be further secured to the outer cylinder 43. Specifically, the end of the magnetic concentrating medium rod 2, away from the fixing rib 3, is inserted into a pre-reserved hole 5 in the side wall of the outer cylinder 43. To ensure rotational stability, the magnetic concentrating medium rod 2 is secured to the outer cylinder 43 by welding. Specifically, the diameter of the magnetic concentrating rod 2 is generally set to 1mm-5mm, and the corresponding reserved hole 5 has a diameter 1.2-1.5 times larger than the diameter of the magnetic concentrating rod 2 and a depth of 5mm-8mm. Furthermore, the spacing between two adjacent reserved holes 5 is designed to be 2-3 times the diameter of the magnetic concentrating rod 2. Preferably, the distance between two adjacent fixing ribs 3 is 50mm-100mm, and the diameter of the fixing rib 3 is 5mm-10mm. This ensures that the distribution density of the magnetic concentrating rods 2 meets the required usage.

[0027] Second, see Figure 4 and Figure 5As shown, the drive assembly consists of a connecting shaft 6, a driven gear 7, a transmission gear, and a rotary driver. Specifically, two connecting shafts 6 are provided, each fixed to the separated side walls of two side plates 1. The two connecting shafts 6 are coaxial, and the side plates 1 are preferably configured as a disc coaxial with the connecting shafts 6. Furthermore, one of the connecting shafts 6 is configured for rotational connection with the magnetic separator body; a driven gear 7 is mounted on the other connecting shaft 6, and the transmission gear is meshed with the driven gear 7; the rotary driver is configured for fixation to the magnetic separator body, and the output shaft of the rotary driver is connected to the transmission gear to drive the transmission gear to rotate. Based on this, the multiple magnetic medium rods 2 are divided into multiple groups, and the multiple magnetic medium rods 2 in each group are linearly distributed along a direction perpendicular to the axis of the side plate 1. The length of the multiple magnetic medium rods 2 in each group gradually decreases toward both sides with the axis of the side plate 1 as the center. The multiple magnetic medium rods 2 in each group are fixed to multiple fixing ribs 3 to form a mesh. Preferably, the distance between two adjacent fixed ribs 3 is 50 mm to 100 mm, and the diameter of the fixed rib 3 is 5 mm to 10 mm. In addition, in order to realize the rotation of the magnetic medium rod 2, the rotary driver should preferably adopt a servo motor, and the transmission gear can be a ring gear or a central gear. When the ring gear is selected, the ring gear has internal teeth, and the driven gear 7 is placed on the inner side of the ring gear and meshes with the internal teeth of the ring gear. The ring gear is used for rotational connection with the magnetic separator body. The ring gear is fixed to the output shaft of the rotary driver through a connecting rod, and the ring gear is coaxial with the output shaft of the rotary driver. When the central gear is selected, the central gear has external teeth, the central gear is mounted on the output shaft of the rotary driver, and the driven gear 7 meshes with the external teeth of the central gear.

[0028] Furthermore, in order to effectively improve the selectivity and adaptability of magnetic mineral particles, reduce the inclusion of non-magnetic products, improve the purity of magnetic products, improve the sorting efficiency, and effectively shorten the subsequent processing of magnetic products. A general magnetic separator is provided with multiple magnetic medium boxes, and multiple magnetic medium boxes are distributed in a circular array on the magnetic separator. When multiple magnetic medium boxes are provided, it is advisable to adopt a transmission gear and a driven gear 7 to drive in coordination, that is, multiple magnetic medium boxes share a transmission gear. When the transmission gear is a ring gear, multiple driven gears 7 are distributed in a circular array inside the ring gear and mesh with the internal teeth of the ring gear. When the rotary drive drives the ring gear to rotate, multiple driven gears 7 can simultaneously rotate with the corresponding magnetic medium boxes. When the driven gear 7 is a central gear, multiple driven gears 7 are distributed in a circular array on the circumference of the central gear. When the rotary drive drives the central gear to rotate, multiple driven gears 7 can also simultaneously rotate with the corresponding magnetic medium boxes.

[0029] In order to effectively improve the selectivity and adaptability of magnetic mineral particles, reduce the inclusion of non-magnetic products, improve the purity of magnetic products, improve the separation efficiency, and effectively shorten the subsequent processing of magnetic products, the magnetic separator is also equipped with a rotatable central turntable. Multiple magnetic medium boxes are installed on the central turntable. The rotating central turntable drives and cooperates with the drive assembly to achieve synchronous rotation and revolution of the magnetic medium boxes in the background magnetic field.

[0030] The implementation principle of this device: Implementation method 1: When there is no central turntable in the magnetic separator: When sorting mineral particles, the driving component is used to drive the side plate 1, the fixed rib 3 and the magnetic medium rod 2 to rotate as a whole in the background magnetic field, so that the axial direction of the magnetic medium rod 2 and the magnetic field direction of the background magnetic field form a periodic continuous rotation of 0°~360°, that is, the magnetic medium rod 2 and the background magnetic field direction are continuously operated in an alternating motion perpendicular to and parallel to the background magnetic field (that is, the axial direction of the magnetic medium rod 2 and the background magnetic field direction produce a "perpendicular-parallel-perpendicular" periodic motion), so that when the axial direction of the magnetic medium rod 2 is perpendicular to the background magnetic field direction, the mineral particles are subjected to the maximum magnetic force, and when the axial direction of the magnetic medium rod 2 is parallel to the background magnetic field direction, the mineral particles are subjected to the maximum magnetic force. The magnetic force is minimized, so that the magnetic force on the surface of the magnetic medium to which the mineral particles are subjected produces a periodic change of "strong-weak-strong", which can make the magnetic mineral particles be subjected to a periodic force law similar to "agglomeration-dispersion-agglomeration" under the action of the magnetic force. Through the alternating operation of multiple 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 the existing magnetic separation equipment, improving the selectivity of the separation process, effectively improving the selectivity and adaptability of the magnetic mineral particles, reducing the mechanical inclusions and magnetic product inclusions in the strong magnetic separation process, improving the purity of the magnetic product, improving the sorting efficiency, effectively shortening the subsequent processing process of the magnetic product, and reducing the production cost.

[0031] Embodiment 2: When a central turntable is provided in the magnetic separator: First, the rotation of the central turntable enables the magnetic medium box to revolve in the background magnetic field (i.e., the revolution of the magnetic medium rod 2). Then, with the cooperation of the drive assembly, the magnetic medium box can rotate in the background magnetic field, so that the magnetic medium rod 2 in the magnetic medium box and the magnetic field direction of the background magnetic field also form an alternating motion perpendicular and parallel, and the frequency of the alternating switching motion is faster than that of embodiment 1. As a result, the axial direction of the magnetic medium rod 2 and the direction of the background magnetic field produce a "perpendicular-parallel-perpendicular" periodic motion, causing the induced magnetic field on the surface of the magnetic medium rod 2 to produce a periodic "strong-weak-strong" change. Under the action of the magnetic force, the magnetic mineral particles can be subjected to a periodic force pattern similar to "agglomeration-dispersion-agglomeration", 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 the inclusion of magnetic products, 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 carries weakly magnetic minerals to the top of the magnetic separator to unload the ore, the rotating magnetic medium box under the action of the top flushing water can unload the ore more thoroughly. On the one hand, it can increase the circulating load capacity of the magnetic medium rod 2, and on the other hand, it can increase the rotation speed of the ring body, 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 ring speed was 5 r / min. 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 drum magnetic separator are sorted, the background magnetic induction intensity is 1.0T, the diameter of the magnetic medium rod 2 is 2mm, the speed of the central turntable is 5r / min, and the rotation speed of the magnetic medium box 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 materials with a TFe grade of 35.45%, the background magnetic induction intensity is 1.0T, the diameter of the magnetic medium rod 2 is 2mm, the speed of the central turntable is 4r / min, and the rotation speed of the magnetic medium box is 15r / min. A single-stage sorting process can produce a mixed iron ore concentrate with a TFe grade of 50.65%, an increase of 4.61 percentage points compared to 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 magnetic medium box, characterized in that: include: Two side panels (1) are arranged opposite to each other; A plurality of magnetic medium rods (2) are fixedly mounted between the two side plates (1) via fixing ribs (3); A driving component, the output end of which is connected to the side plate (1) or the magnetic medium rod (2) or the side plate (1) and the magnetic medium rod (2), and is used to drive the side plate (1) and the plurality of magnetic medium rods (2) to perform rotational motion together; When in use, the magnetic medium box is used to be placed in the background magnetic field of the magnetic separator, and the driving component drives the two side plates (1) and the plurality of magnetic medium rods (2) between the two side plates to rotate, thereby realizing a periodic transformation of the angle between the axial direction of the magnetic medium rod (2) and the background magnetic field direction from 0° to 360°.

2. A magnetic concentrating medium box according to claim 1, characterized in that: The driving assembly includes an electric roller (4), the electric roller (4) is made of non-magnetic material, the electric roller (4) has a front shaft (41), a rear shaft (42) and a rotating outer cylinder (43), the two side plates (1) are sleeved on the outer cylinder (43), the front shaft (41) and the rear shaft (42) are used to be fixed to the magnetic separator body, and the magnetic medium rod (2) is fixed on the circumference of the outer cylinder (43).

3. A magnetic concentrating medium box according to claim 2, characterized in that: A plurality of the fixing ribs (3) are arranged in a circular array around the outer cylinder (43), and the fixing ribs (3) are parallel to the outer cylinder (43). Both ends of the fixing ribs (3) are vertically fixed on two side plates (1). The magnetic medium rod (2) is vertical to the outer cylinder (43). One end of the magnetic medium rod (2) is fixed to the fixing rib (3), and the other end is inserted into the reserved hole (5) on the side wall of the outer cylinder (43), and the magnetic medium rod (2) is fixed to the outer cylinder (43).

4. A magnetic concentrating medium box according to claim 3, characterized in that: The diameter of the magnetic medium rod (2) is 1 mm to 5 mm, the diameter of the reserved hole (5) is 1.2 to 1.5 times greater than the diameter of the magnetic medium rod (2), the depth is 5 mm to 8 mm, and the spacing between two adjacent reserved holes (5) is 2 to 3 times the diameter of the magnetic medium rod (2).

5. The magnetic concentrating medium box according to claim 1, characterized in that: The drive assembly includes: Two connecting shafts (6) are respectively fixed on the separated side walls of the two side plates (1), and one of the connecting shafts (6) is used for rotationally connecting to the magnetic separator body; A driven gear (7) is mounted on the other connecting shaft (6); A transmission gear meshing with the driven gear (7); The rotary driver is used to be fixed on the magnetic separator body, and the output shaft of the rotary driver is connected to the transmission gear to drive the transmission gear to rotate.

6. The magnetic concentrating medium box according to claim 5, characterized in that: The transmission gear includes a ring gear having internal teeth, the driven gear (7) is placed inside the ring gear and meshes with the internal teeth of the ring gear, the ring gear is used for rotationally connecting with the magnetic separator body, the ring gear is fixed to the output shaft of the rotary driver through a connecting rod, and the ring gear is coaxial with the output shaft of the rotary driver.

7. The magnetic concentrating medium box according to claim 5, characterized in that: The transmission gear comprises a central gear having external teeth, the central gear is sleeved on the output shaft of the rotary drive, and the driven gear (7) is meshed with the external teeth of the central gear.

8. A magnetic concentrating medium box according to claim 6 or 7, characterized in that: The side plate (1) is disc-shaped, and the plurality of magnetic medium rods (2) are divided into a plurality of groups. The plurality of magnetic medium rods (2) in each group are linearly distributed along a direction perpendicular to the axis of the side plate (1), and the length of the plurality of magnetic medium rods (2) in each group is gradually shortened toward both sides with the axis of the side plate (1) as the center, and the plurality of magnetic medium rods (2) in each group are fixed with the plurality of fixing ribs (3) to form a mesh.

9. The magnetic concentrating medium box according to claim 8, characterized in that: The distance between two adjacent fixing ribs (3) is 50 mm to 100 mm, and the diameter of the fixing rib (3) is 5 mm to 10 mm.

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