A magnetic separation device with adjustable magnetism

Abstract

The application relates to a magnetic separation device with adjustable magnetism, which comprises a magnetic separation device body and a driven roller installed in the magnetic separation device body, wherein the driven roller comprises a separation cylinder body and coaxially arranged adjustable magnets, both ends of the separation cylinder body are provided with end covers, the center of the end cover is provided with a hollow shaft; the adjustable magnet mainly comprises a plurality of concentrically arranged arc-shaped magnetic plates, support discs are arranged between both ends of the arc-shaped magnetic plate, the center of the support disc is provided with a rotating shaft extending from the hollow shaft, a plurality of radial long holes are uniformly distributed on the support disc, adjusting shafts are arranged at both ends of the arc-shaped magnetic plate, the adjusting shafts are matched and sleeved into the radial long holes, and nuts are threadedly connected to the outer ends of the adjusting shafts; the device can separate at high rotating speed of the separation cylinder body, the separation processing efficiency is improved, high-efficiency and reliable separation of the selected materials with wide particle size distribution can be realized, the magnets can independently rotate in the separation cylinder body, a rotating magnetic field is formed, the separation effect of the magnetic materials and the non-magnetic materials is strong, and the separation is sufficient and thorough.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separators, and more particularly to a magnetic separator with adjustable magnetism. Background Technology

[0002] In diamond manufacturing enterprises, magnetic separation devices are the core purification and sorting equipment. The synthesis of synthetic diamonds requires metal catalysts, which can leave magnetic impurity inclusions in the finished product, affecting its strength and stability. Magnetic separation devices utilize magnetic and mechanical forces, based on differences in magnetic properties, to efficiently separate magnetic particles containing impurities from high-purity non-magnetic diamonds. This not only achieves non-destructive impurity removal, avoiding the pollution and losses associated with chemical impurity removal, but also allows for the assessment of the internal quality of the diamond by the strength of its magnetic fields, ensuring quality for subsequent grading applications. It is a crucial process for improving the quality and yield of diamond products.

[0003] Currently, the magnets inside the driven roller of magnetic separators are usually fixed, and the magnets and driven rollers cannot rotate relative to each other. The material is basically stationary on the conveyor belt for magnetic attraction and separation, which results in insufficient and incomplete separation. In addition, the magnetic attraction force of the magnets inside the driven roller is a fixed value, which cannot be finely adjusted according to the material properties, resulting in poor adaptability and needing improvement. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a magnetic separation device with adjustable magnetism.

[0005] The technical solution of this utility model is: an adjustable magnetic separator, including a magnetic separator body and a driven roller installed in the magnetic separator body. The driven roller includes a sorting cylinder and an adjustable magnet coaxially installed in the sorting cylinder. The adjustable magnet and the sorting cylinder can rotate relative to each other. Both ends of the sorting cylinder are provided with end caps, and the center of the end caps is provided with a hollow shaft.

[0006] The adjustable magnet is mainly composed of several concentrically arranged arc-shaped magnetic plates. A support plate is provided between each end of the arc-shaped magnetic plate. The support plate is a circular disc. A rotating shaft extending from a hollow shaft is provided at the center of the support plate. The rotating shaft and the hollow shaft can rotate relative to each other. Several radial elongated holes are evenly distributed on the support plate. The outer ends of the radial elongated holes extend to the outer edge of the support plate. An adjustment shaft is provided at each end of the arc-shaped magnetic plate. The adjustment shaft is fitted into the radial elongated holes. A fastening nut is threaded to the outer end of the adjustment shaft.

[0007] Preferably, the inner end of the adjusting shaft is a square shaft, which is fitted into the radial elongated hole, forming a sliding pair between the square shaft and the radial elongated hole, and a stud is connected to the end face of the square shaft.

[0008] Preferably, both ends of the sorting cylinder are provided with annular folds facing inward, and a number of threaded holes are evenly distributed on the annular folds. A number of fastening screws are evenly distributed between the end cap and the arc-shaped folds.

[0009] Preferably, the magnetic separator body includes a housing, a drive wheel, and a conveyor belt. The conveyor belt is fitted between the drive wheel and the driven roller. The conveyor belt is made of rubber. The hollow shaft and the rotating shaft are respectively connected to independent drivers. The drivers are geared motors. The upper part of the housing is provided with a feed hopper, and the lower port of the feed hopper is close to the surface of the conveyor belt.

[0010] Preferably, the lower part of the housing is provided with a magnetic material receiving groove and a non-magnetic material receiving groove side by side. The main body of both receiving grooves is a conical structure. The magnetic material receiving groove is located inside the driven roller, and the non-magnetic material receiving groove is located outside the driven roller.

[0011] Preferably, a partition is provided between the magnetic material receiving trough and the non-magnetic material receiving trough, and a certain distance is provided between the partition and the conveyor belt.

[0012] The beneficial technical effects of this utility model are: (1) The magnet can rotate independently inside the sorting cylinder to form a rotating magnetic field, which allows the selected material to flip and jump on the surface of the conveyor belt, so that the magnetic material at different positions is fully attracted to the surface of the belt, while the non-magnetic material at different positions is fully thrown out, making the separation of magnetic material and non-magnetic material strong, and the separation is sufficient and thorough.

[0013] (2) An adjustable magnet is adopted, which can adjust the magnitude of the magnetic attraction force generated by the sorting cylinder, so that the separation effect can be adjusted by adjusting the magnetic field conditions and the rotation speed of the sorting cylinder according to the material properties and separation requirements, so as to achieve the purpose of sorting different types of materials and improve its adaptability.

[0014] (3) The device can perform separation at high speed in the sorting cylinder, improve the sorting efficiency, and realize efficient and reliable separation of selected materials with a wide particle size distribution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the magnetic separator; Figure 2 This is a three-dimensional structural diagram of the driven roller; Figure 3 This is a schematic diagram of the internal structure of the driven roller; Figure 4 yes Figure 3 A schematic diagram of the AA-direction cross-section structure; Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustable magnet; Figure 6This is a three-dimensional structural diagram of the adjustable magnet support disk in its disassembled state.

[0016] In the diagram, 1. Driven roller, 11. Sorting cylinder, 12. Fastening screw, 13. End cover, 131. Hollow shaft, 14. Adjustable magnet, 141. Support plate, 142. Radial elongated hole, 143. Arc-shaped magnetic plate, 144. Adjusting shaft, 145. Square prism shaft, 146. Fastening nut, 147. Rotating shaft, 21. Machine housing, 22. Drive wheel, 23. Conveyor belt, 24. Feed hopper, 25. Magnetic material receiving trough, 26. Non-magnetic material receiving trough, 27. Partition plate, 31. Magnetic material, 32. Non-magnetic material. Detailed Implementation

[0017] Example 1, see appendix Figure 1-4 An adjustable magnetic separator is composed of a magnetic separator body and a driven roller 1 installed inside the magnetic separator body. The magnetic separator body includes a housing 21, a drive wheel 22 and a conveyor belt 23. The conveyor belt 23 is fitted between the drive wheel 22 and the driven roller 1. A feed hopper 24 is provided on the upper part of the housing 21, and the lower port of the feed hopper 24 is close to the surface of the conveyor belt 23.

[0018] A rolling feeding speed adjustment device is also installed at the feeding port of the feed hopper 24 to achieve uniform feeding of the selected material with a width of 400mm. A real-time magnetic field strength monitoring device is installed on the surface near the sorting cylinder 11 to monitor the magnetic field strength of the current equipment operation in real time.

[0019] The sorting cylinder 11 is made of stainless steel and is non-magnetic. The outer diameter of the sorting cylinder 11 is 600mm, the inner diameter is 580mm, and the length is 700mm. The sorting cylinder 11 is driven to rotate by the conveyor belt 23.

[0020] The conveyor belt 23 is made of anti-static rubber, which is non-magnetic and flexible, allowing it to be bent and straightened. The conveyor belt has dimensions of 4000mm × 700mm × 8mm and is driven by the drive pulley 22.

[0021] The drive wheel 22 is made of stainless steel and is non-magnetic. The outer diameter of the drive wheel 22 is 300mm, and its length is 700mm. The drive wheel 22 is driven by a frequency converter, with a speed range of 0–10 rpm.

[0022] The lower part of the housing 21 is provided with a magnetic material receiving groove 25 and a non-magnetic material receiving groove 26 arranged side by side. The magnetic material receiving groove 25 is located inside the driven roller 1, and the non-magnetic material receiving groove 26 is located outside the driven roller 1. A partition 27 is provided between the magnetic material receiving groove 25 and the non-magnetic material receiving groove 26.

[0023] The magnetic material receiving trough 25, the non-magnetic material receiving trough 26, the discharge bin and the machine casing 21 are all made of stainless steel and are non-magnetic.

[0024] Example 2, see appendix Figure 3-6 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the driven roller 1 includes a sorting cylinder 11 and an adjustable magnet 14 coaxially installed in the sorting cylinder 11. Both ends of the sorting cylinder 11 are provided with end caps 13, and the center of the end caps 13 is provided with a hollow shaft 131. The adjustable magnet 14 is the core of the magnetic separation device and is mainly composed of several concentrically arranged arc-shaped magnetic plates 143. The arc-shaped magnetic plates are arranged with alternating N and N polarities along the circumferential direction. This embodiment is designed with 18 pole magnetic materials, symmetrically distributed on the magnet.

[0025] A support plate 141 is provided between both ends of the arc-shaped magnetic plate 143. A rotating shaft 147 extending from the hollow shaft 131 is provided at the center of the support plate 141. The hollow shaft 131 and the rotating shaft 147 are respectively connected to an independent driver. Under the action of the driver, the adjustable magnet 14 and the sorting cylinder 11 can operate independently, forming a rotating magnetic field on the outer surface of the sorting cylinder 11, so that the selected material can tumble and jump on the surface of the conveyor belt 23, so that the magnetic material 31 at different positions is fully attracted to the surface of the belt, while the non-magnetic material 32 at different positions is fully thrown out, so that the separation effect between the magnetic material 31 and the non-magnetic material 32 is strong, and the separation is sufficient and thorough.

[0026] The support plate 141 has several radially elongated holes 142 evenly distributed on it. The two ends of the arc-shaped magnetic plate 143 are provided with adjusting shafts 144. The adjusting shafts 144 are fitted into the radially elongated holes 142. A fastening nut 146 is threaded to the outer end of the adjusting shaft 144. The diameter of the arc-shaped magnetic plate 143 can be adjusted by sliding the adjusting shaft 144 along the radially elongated holes 142. The magnetic induction intensity on the surface of the cylinder can be changed by changing the diameter of the magnet circumference. The diameter of the magnet circumference varies from Ф500 to Ф580 mm.

[0027] The inner end of the adjusting shaft 144 is a square shaft 145, which is fitted into the radial elongated hole 142. The end face of the square shaft is connected to a stud, which limits the arc-shaped magnetic plate 143 to prevent it from rotating between the radial elongated holes 142.

[0028] Both ends of the sorting cylinder 11 are provided with annular folds facing inward. Several fastening screws 12 are evenly distributed between the end cover 13 and the arc-shaped folds. The annular folds are used to improve the fastening strength between the end cover 13 and the sorting cylinder 11.

[0029] The working principle of the adjustable magnetic separator in this embodiment is as follows: the feed hopper 24 evenly feeds the material to be selected onto the conveyor belt 23. Driven by the drive wheel 22, the conveyor belt 23 transports the material to the sorting cylinder 11. When the material is moved to the position of the sorting cylinder 11 by the conveyor belt 23, the magnetic material 31 in the material is affected by the adjustable magnet 14 set inside the sorting cylinder 11, which has a different rotation speed than the sorting cylinder. The magnetic material 31 flips and jumps on the surface of the conveyor belt 23, so that the magnetic material 31 and the non-magnetic material are separated into layers. Under the radial magnetic force and flipping action, the magnetic material 31 can stick tightly to the surface of the conveyor belt 23. The non-magnetic material 32 is flipped to the outermost floating surface. Under the combined effects of gravity and centrifugal force of the sorting cylinder 11, the non-magnetic material 32 is fully deposited into the non-magnetic material receiving trough 26, while the magnetic material 31 is fully adsorbed onto the surface of the conveyor belt 23 and continues to move with the conveyor belt 23. Finally, under the action of the conveyor belt 23, the magnetic material 31 is turned out of the sorting cylinder 11, and the magnetic force it experiences gradually decreases and disappears, so it automatically detaches from the surface of the conveyor belt 23 and is unloaded into the magnetic material receiving trough 25 by gravity, thereby achieving efficient and automatic separation of the magnetic material 31 and the non-magnetic material 32.

Claims

1. A magnetic separator with adjustable magnetic properties, comprising a separator body and a driven roller installed within the separator body, characterized in that: The driven roller includes a sorting cylinder and an adjustable magnet coaxially mounted inside the sorting cylinder. Both ends of the sorting cylinder are provided with end caps, and the center of the end caps is provided with a hollow shaft. The adjustable magnet is mainly composed of several concentrically arranged arc-shaped magnetic plates. There is a support plate between each end of the arc-shaped magnetic plate. The center of the support plate is a rotating shaft extending from the hollow shaft. There are several radial elongated holes evenly distributed on the support plate. There is an adjustment shaft at each end of the arc-shaped magnetic plate. The adjustment shaft is fitted into the radial elongated hole. A fastening nut is threaded to the outer end of the adjustment shaft.

2. The magnetic separator with adjustable magnetism according to claim 1, characterized in that: The inner end of the adjusting shaft is a square shaft, which is fitted into a radial elongated hole. The end face of the square shaft is connected to a stud.

3. The magnetic separator with adjustable magnetism according to claim 1, characterized in that: Both ends of the sorting cylinder are provided with annular folds facing inward, and several fastening screws are distributed between the end cap and the arc-shaped folds.

4. The magnetic separator with adjustable magnetism according to claim 1, characterized in that: The magnetic separator body includes a housing, a drive wheel, and a conveyor belt. The conveyor belt is fitted between the drive wheel and the driven roller. The hollow shaft and the rotating shaft are respectively connected to independent drivers. The upper part of the housing is provided with a feed hopper, and the lower port of the feed hopper is close to the surface of the conveyor belt.

5. The magnetic separator with adjustable magnetism according to claim 4, characterized in that: The lower part of the housing is provided with magnetic material receiving grooves and non-magnetic material receiving grooves side by side. The magnetic material receiving grooves are located inside the driven roller, and the non-magnetic material receiving grooves are located outside the driven roller.

6. The magnetic separator with adjustable magnetism according to claim 5, characterized in that: A partition is provided between the magnetic material receiving trough and the non-magnetic material receiving trough.

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