Magnet for particle sorting

Abstract

The invention discloses a magnet for particle sorting, and belongs to the technical field of magnet manufacturing. The device comprises an upper magnet and a lower magnet, the upper magnet is triangular and comprises rhombic iron, a left magnet and a right magnet, the left magnet is located on the upper left portion of the rhombic iron, and the right magnet is located on the upper right portion of the rhombic iron; a groove is formed in the middle of the lower magnet and comprises a rectangular lower magnet, a rectangular left magnet, a rectangular right magnet and a magnetism gathering medium, the rectangular lower magnet is arranged at the bottom of the groove, the rectangular left magnet is arranged on the left side of the groove, and the rectangular right magnet is arranged on the right side of the groove; cuboid high-purity pure iron is embedded in the lower magnet groove and serves as a magnetism gathering medium. The tip of the diamond iron in the upper magnet is right opposite to the groove of the lower magnet, and a gap exists between the upper magnet and the lower magnet. According to the invention, the magnetic field intensity is increased, and the gradient in the magnetic field is enhanced, so that the clustered particles with small mass and larger kinetic energy are easier to separate.

Description

Technical Field

[0001] The invention relates to the technical field of magnet manufacturing, in particular to a magnet used for particle sorting. Background Art

[0002] A magnet is a magnetic object that can attract substances such as iron, cobalt, and nickel. It has an invisible force that can attract some substances and repel others. There is a magnetic field around the magnet that can deflect the magnetic needle. Magnets are gradually being used in various fields of production and life. With the continuous advancement of science and technology, magnets that usually produce uniform magnetic fields can no longer meet the needs. In many technical fields, magnets that can produce high-gradient non-uniform magnetic fields can be used to achieve sorting.

[0003] Most of the existing technologies are based on the magnet model in the Stern-Gerlach experiment, which uses different magnetic moments to sort out different particles, thereby achieving particle sorting. However, there is a problem that particles are not easy to separate when the mass of the atomic cluster decreases and the kinetic energy increases. Summary of the invention

[0004] The purpose of the present invention is to provide a magnet for particle sorting, which uses the magnetic focusing effect of the magnetic medium in the magnetic field and the coercive force of the magnet to achieve a high-gradient non-uniform magnetic field, so as to solve the problem of small mass and larger kinetic energy clusters and particles that are difficult to separate raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A magnet for particle sorting, characterized in that it comprises: an upper magnet and a lower magnet;

[0006] The upper magnet is triangular in shape, and includes a rhombus iron, a left magnet, and a right magnet, wherein the left magnet is located at the upper left of the rhombus iron, and the right magnet is located at the upper right of the rhombus iron;

[0007] The middle of the lower magnet is a groove, including a rectangular lower magnet, a rectangular left magnet, a rectangular right magnet and a magnetic concentrator. The bottom of the groove is a rectangular lower magnet, the left side of the groove is a rectangular left magnet, and the right side of the groove is a rectangular right magnet. A rectangular high-purity iron is embedded in the groove of the lower magnet as a magnetic concentrator. The magnetic concentrator is a structure for capturing weakly magnetic minerals in a magnetic separator. It is a structural material used to gather the surrounding magnetic field to a certain area in a magnetic field to form a large magnetic field. Therefore, placing a magnetic concentrator in a specific shape in the groove can further improve the gradient in the groove.

[0008] The tip of the rhombus iron in the upper magnet faces the groove of the lower magnet, and there is a gap between the upper magnet and the lower magnet.

[0009] According to the above technical solution, the angle of the rhombus iron tip is 70 °The tip effect exists. The magnetic induction intensity at the tip of the magnet is larger and the gradient is also larger. Therefore, the tip of the magnet can be designed as a magnetic concentrator to increase the gradient below the tip of the magnet.

[0010] According to the above technical solution, high-purity pure iron is embedded between the rhombus iron and the left magnet, and high-purity pure iron is embedded between the rhombus iron and the right magnet;

[0011] High-purity iron is embedded between the rectangular lower magnet and the rectangular left magnet, and high-purity iron is embedded between the rectangular lower magnet and the rectangular right magnet. The upper and lower magnet parts are divided and combined to different degrees, and high-purity iron is embedded between the magnets as a magnetic medium to enhance the gradient in the magnetic field.

[0012] According to the above technical solution, the magnetization direction of the left magnet and the right magnet is perpendicular to the lower rhombus iron hypotenuse.

[0013] According to the above technical solution, the magnetization direction of the rectangular lower magnet is along the negative direction of the y-axis.

[0014] According to the above technical solution, if the magnetization directions of the rectangular left magnet and the rectangular right magnet are along the x-axis and opposite to each other, or upward along the y-axis, the overall downward magnetic induction direction will be offset to a certain extent. Therefore, the magnetization methods of the rectangular left magnet and the rectangular right magnet include: when the rectangular left magnet is magnetized along the negative direction of the x-axis, the magnetization direction of the rectangular right magnet is along the positive direction of the x-axis; the rectangular left magnet and the rectangular right magnet are both magnetized downward along the y-axis.

[0015] Among them, when the rectangular left magnet and the rectangular right magnet are magnetized in opposite directions, there is a larger gradient value and gradient range. This is because the coercive force of the magnet is used to make the two magnets with magnetization components in opposite directions squeeze each other to create a large-value magnetic field.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention is assembled by multi-stage magnets, and the magnets are magnetized in multiple directions. The coercive force of the magnets is used to squeeze two magnets with magnetization components in opposite directions against each other, thereby producing a large-magnetic field strength. The tip effect is used at the tip of the magnet, and magnetic concentrating media are placed at the tip and in the groove to enhance the gradient in the magnetic field, thereby obtaining a high-gradient non-uniform magnetic field, making it easy to separate particles in clusters with small mass and greater kinetic energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1It is a schematic structural diagram of a magnet for particle sorting according to the present invention;

[0019] Figure 2 is a schematic diagram of the magnetic field strength of a magnet used for particle sorting in an embodiment;

[0020] In the figure: 1. Rhombus iron; 2. Left magnet; 3. Right magnet; 4. Rectangular lower magnet; 5. Rectangular left magnet; 6. Rectangular right magnet; 7. Magnetic medium. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention provides a technical solution: a magnet for particle sorting ( Figure 1 ), comprising: an upper magnet and a lower magnet;

[0023] The upper magnet is triangular in shape, including a rhombus iron 1, a left magnet 2 and a right magnet 3. The left magnet 2 is located at the upper left of the rhombus iron 1, and the right magnet 3 is located at the upper right of the rhombus iron 1. The tip angle of the rhombus iron 1 is 70 ° ;

[0024] The middle of the lower magnet is a groove, including a rectangular lower magnet 4, a rectangular left magnet 5, a rectangular right magnet 6 and a magnetic concentrator 7. The bottom of the groove is a rectangular lower magnet 4, the left side of the groove is a rectangular left magnet 5, and the right side of the groove is a rectangular right magnet 6; the interior of the lower magnet groove is inlaid with a rectangular high-purity iron as a magnetic concentrator 7;

[0025] The tip of the rhombus iron 1 in the upper magnet faces the groove of the lower magnet, and there is a gap between the upper magnet and the lower magnet.

[0026] Among them, high-purity pure iron is inlaid between the rhombus iron 1 and the left magnet 2, and high-purity pure iron is inlaid between the rhombus iron 1 and the right magnet 3; high-purity pure iron is inlaid between the rectangular lower magnet 4 and the rectangular left magnet 5, and high-purity pure iron is inlaid between the rectangular lower magnet 4 and the rectangular right magnet 6.

[0027] A magnetizing method for particle sorting: the magnetizing directions of the left magnet 2 and the right magnet 3 are perpendicular to the hypotenuse of the lower rhombus iron 1, and the magnetizing direction of the rectangular lower magnet 4 is along the negative direction of the y-axis; there are two magnetizing methods for the rectangular left magnet 5 and the rectangular right magnet 6, one is that when the rectangular left magnet 5 is magnetized along the negative direction of the x-axis, the magnetizing direction of the rectangular right magnet 6 is along the positive direction of the x-axis; the other is that both the rectangular left magnet 5 and the rectangular right magnet 6 are magnetized downward along the y-axis.

[0028] Example

[0029] First, according to the core parameter size (Table 1), the size of the rhombic iron 1, the left magnet 2, the right magnet 3, the rectangular lower magnet 4, the rectangular left magnet 5, the rectangular right magnet 6 and the magnetic concentrator 7 is determined, and a magnet for particle sorting is obtained by assembling them according to the distance between the upper and lower magnets;

[0030] Table 1 Core parameter dimensions

[0031] Diamond iron tip angle 70° Upper magnet width 40mm Upper magnet height 28.6mm Rhombus iron high 9mm Rhombus iron side length 7mm Distance between upper and lower magnets 2mm Bottom magnet width 40mm Bottom magnet height 20mm Groove Width 10mm Groove height 20mm Width of rectangular iron block embedded in groove 10mm The height of the rectangular iron block embedded in the groove 16mm The width of the rectangular magnets on both sides of the groove 15mm The height of the rectangular magnets on both sides of the groove 20mm The overall model is elongated 900mm The rectangular magnets on both sides of the groove are elongated 300mm

[0032] Then the left magnet 2 and the right magnet 3 are magnetized in a direction perpendicular to the hypotenuse of the lower rhombus iron 1, and the rectangular lower magnet 4 is magnetized along the negative direction of the y-axis; the rectangular left magnet 5 is magnetized along the negative direction of the x-axis, and the rectangular right magnet 6 is magnetized along the positive direction of the x-axis, and the magnetic field intensity and gradient generated by the magnet are obtained, wherein the gradient of the particle passing area below the tip is about 10 cm, and the gradient reaches 3000 T / m; the gradient of the area about 20 cm reaches 500 T / m; the gradient of the remaining area is smaller, about 100 T / m.

[0033] The Cu13 particle beams with kinetic energies of 0.5Kev, 1Kev, 2Kev, and 3Kev enter the screening area from the gap between the upper magnet and the lower magnet. After the magnetic force, the trajectory is deflected and enters the groove area for particle separation. The results are shown in the figure. Figure 2 shown.

[0034] Among them, at 0.5Kev, the particles can be separated by more than 1mm, at 1Kev they can be separated by more than 0.5mm, at 2Kev they can be separated by more than 0.25mm, and at 3Kev they can be separated by more than 0.1mm.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnet for particle sorting, characterized in that: include: Upper magnet and lower magnet; The upper magnet is triangular in shape and comprises a rhombus iron (1), a left magnet (2) and a right magnet (3), wherein the left magnet (2) is located at the upper left of the rhombus iron (1), and the right magnet (3) is located at the upper right of the rhombus iron (1); The middle of the lower magnet is a groove, comprising a rectangular lower magnet (4), a rectangular left magnet (5), a rectangular right magnet (6) and a magnetic concentrating medium (7); the bottom of the groove is the rectangular lower magnet (4), the left side of the groove is the rectangular left magnet (5), and the right side of the groove is the rectangular right magnet (6); a rectangular high-purity iron is embedded in the groove of the lower magnet as the magnetic concentrating medium (7); The tip of the rhombus iron (1) in the upper magnet faces the groove of the lower magnet, and there is a gap between the upper magnet and the lower magnet.

2. A magnet for particle sorting according to claim 1, characterized in that: The tip angle of the rhombus iron (1) is 70 ° .

3. A magnet for particle sorting according to claim 1, characterized in that: High-purity iron is embedded between the rhombus iron (1) and the left magnet (2), and high-purity iron is embedded between the rhombus iron (1) and the right magnet (3); High-purity iron is embedded between the rectangular lower magnet (4) and the rectangular left magnet (5), and high-purity iron is embedded between the rectangular lower magnet (4) and the rectangular right magnet (6).

4. A magnet for particle sorting according to claim 1, characterized in that: The magnetization directions of the left magnet (2) and the right magnet (3) are perpendicular to the hypotenuse of the lower rhombus iron (1).

5. A magnet for particle sorting according to claim 1, characterized in that: The magnetization direction of the rectangular lower magnet (4) is along the negative direction of the y-axis.

6. A magnet for particle sorting according to claim 1, characterized in that: The magnetization method of the rectangular left magnet (5) and the rectangular right magnet (6) includes: When the rectangular left magnet (5) is magnetized along the negative direction of the x-axis, the rectangular right magnet (6) is magnetized along the positive direction of the x-axis; The rectangular left magnet (5) and the rectangular right magnet (6) are both magnetized downward along the y-axis.

Images