Permanent magnet magnetic system of equal magnetic force field

Abstract

The utility model belongs to the magnetic system construction technical field of magnetic separation equipment, concretely relates to a permanent magnetic magnetic system of equal magnetic force field, including two symmetrical magnetic pole groups, each magnetic pole group includes magnetic pole head and reinforcing magnet block group, the width of magnetic pole head is L, height is H, then 2 <= H / L <= 3, the opposite side of magnetic pole head is fixedly provided with first arc convex and second arc convex, the central angle alpha of first arc convex and second arc convex is same and 20 <= alpha <= 40, the radius R1 and R2 of first arc convex and second arc convex, 2*R2 <= R1 <= 3*R2, the equal magnetic force field is located between two first arc convexes, and the distance between first arc convex and the side of second arc convex far away from first arc convex is 0.1*R1-0.45*R1. The utility model produces equal magnetic force field in the magnetic system, adjusts the inclination angle of magnetic system, can realize the effect of different magnetic minerals in mineral separation, and effectively improves the separation precision.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic system construction technology for magnetic separation equipment, and specifically relates to a permanent magnet system with equal magnetic field. Background Technology

[0002] The effectiveness of magnetic mineral separation technology essentially depends on the difference in magnetic susceptibility between the target mineral and the gangue mineral. However, geological origin and beneficiation processes can cause significant changes in mineral magnetic susceptibility, significantly reducing separation efficiency.

[0003] Existing conventional equipment often uses non-uniform magnetic fields for mineral sorting, which causes the acceleration of magnetic mineral particles to gradually increase during the sorting process. As a result, it is impossible to guarantee high-precision sorting of minerals with small magnetic differences.

[0004] Isodynamic magnetic fields refer to magnetic field structures in which magnetic field lines are evenly distributed or have specific symmetry. Their core characteristic is that the density or direction of the magnetic field lines exhibits equidynamic properties (i.e., the force field strength remains constant in space).

[0005] An isomagnetic field means that the magnetic force experienced by each point in the sorting space is equal (i.e., the product of the magnetic field strength and the magnetic field gradient remains in a dynamic and stable state, so that the magnetic force experienced by the magnetic mineral is only related to the magnetism of the mineral itself). Therefore, the acceleration of the magnetic particles remains constant during the sorting process.

[0006] Therefore, by constructing a corresponding magnetic system to generate an equimagnetic field for mineral sorting, it is possible to separate magnetic minerals from minerals, or separate only strongly magnetic minerals from minerals, or separate strongly and weakly magnetic mixed minerals as needed. Summary of the Invention

[0007] This invention addresses the problem that existing methods using non-uniform magnetic fields for magnetic mineral sorting cannot separate minerals with different magnetic properties as needed. It provides a permanent magnet system with an equal magnetic field. By constructing such a system, and utilizing the characteristic that magnetic minerals experience uniform force throughout the magnetic field, the tilt angle of the magnetic system can be adjusted. After the minerals are decomposed by gravity, the angle between the magnetic force on the mineral and one of the gravitational components is adjusted. This allows the minerals to cancel out the gravitational component based on their own magnetic properties, thus achieving the sorting of minerals with the desired magnetic properties, improving sorting accuracy, and enhancing the equipment's adaptability to different minerals.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: A permanent magnet system with an equal magnetic field includes two symmetrically arranged magnetic pole groups. Each magnetic pole group includes a magnetic pole head and a reinforcing magnetic block group. The magnetic pole head is used to generate an equal magnetic field, and the reinforcing magnetic block group is used to increase the magnetic field strength within the equal magnetic field. The width of the magnetic pole head is L and the height is H, where 2 ≤ H / L ≤ 3. A first arc-shaped protrusion and a second arc-shaped protrusion are fixedly arranged on opposite sides of the magnetic pole head. The protruding portions of the first and second arc-shaped protrusions are tangent and smoothly connected. The central angle α of the first and second arc-shaped protrusions is the same and 20° ≤ α ≤ 40°. The radius of the first arc-shaped protrusion is R1, and the radius of the second arc-shaped protrusion is R2. R2≤R1≤3*R2; The equal magnetic field is located between the two first arc-shaped protrusions, and the distance between the first arc-shaped protrusion and the side away from the second arc-shaped protrusion is 0.1*R1-0.45*R1. The first arc-shaped protrusion and the second arc-shaped protrusion cooperate to make the magnetic field generated at the corresponding position equal magnetic field. The magnetic field strength is guaranteed by strengthening the magnetic block group.

[0009] Preferably, the reinforcing magnetic block group includes a first magnetic block, a second magnetic block, and a third magnetic block. A first magnetic block is provided at the ends of the two magnetic pole heads that are far apart. A second magnetic block is provided at both the upper and lower ends of each magnetic pole head. A third magnetic block is provided at both the front and rear ends of each magnetic pole head. The first, second, and third magnetic blocks have the same polarity on the side facing the corresponding magnetic pole head. The first, second, and third magnetic blocks of one reinforcing magnetic block group have N poles on the side near the corresponding magnetic pole head, and the first, second, and third magnetic blocks of the other reinforcing magnetic block group have S poles on the side near the corresponding magnetic pole head. The magnetic field strength in the equimagnetic field is ensured by multiple first, second, and third magnetic blocks.

[0010] Preferably, both magnetic pole heads are quadrangular prism structures, and they are integrally formed with the corresponding first arc-shaped protrusion and second arc-shaped protrusion to ensure the strength and consistency after forming.

[0011] Preferably, the radius R1 of the first arc-shaped protrusion and the radius R2 of the second arc-shaped protrusion are 300mm and 150mm respectively, and the central angle α is 25°.

[0012] Preferably, the distance between the two magnetic pole heads is 80mm, the height H is 400mm, and the width L is 190mm.

[0013] Preferably, the first magnetic block is a cuboid structure of 190mm*50mm*400mm, the second magnetic block is a cuboid structure of 190mm*50mm*50mm, and the third magnetic block is a cuboid structure of 50mm*50mm*400mm, to ensure the symmetry of the two reinforcing magnetic block groups and reduce the processing difficulty.

[0014] Preferably, a sorting tank is provided between the two magnetic pole groups. The sorting tank is located in the equimagnetic field. The sorting tank includes an upper cylinder and two lower cylinders. The upper cylinder is located between two first arc-shaped protrusions. Two lower cylinders are fixedly provided at the lower end of the upper cylinder. The upper sides of the two lower cylinders are connected to the interior of the upper cylinder. Each lower cylinder is provided with a valve. The sorting tank limits the separation of magnetic minerals, and under the action of the magnetic field, magnetic minerals and non-magnetic minerals enter different lower cylinders respectively.

[0015] Preferably, the magnetic pole head and the corresponding first arc-shaped protrusion and second arc-shaped protrusion are columnar structures with one side arc-shaped, made of electrical pure iron.

[0016] Preferably, the first magnetic block, the second magnetic block, and the third magnetic block are all cylindrical structures made of magnetic materials to ensure magnetic field strength.

[0017] Preferably, the first magnetic block, the second magnetic block, and the third magnetic block are all cylindrical structures made of ferrite or neodymium iron boron.

[0018] The beneficial effects of this utility model through the above technical solution are as follows: 1. This utility model uses an integrally formed first arc-shaped protrusion, a second arc-shaped protrusion, and a magnetic pole head to form a magnetic pole, which enables an equal magnetic field to be formed between the two first arc-shaped protrusions, thereby avoiding the influence of the feeding position on the sorting effect and ensuring the sorting effect.

[0019] 2. By changing the number of the first magnetic block, the second magnetic block, and the third magnetic block, and adjusting the distance between the two magnetic poles formed by the magnetic pole head, the first arc-shaped protrusion, and the second arc-shaped protrusion, this utility model can control and adjust the magnetic field strength in the sorting magnetic field, thereby improving the equipment's adaptability to different minerals.

[0020] 3. This utility model achieves the separation of minerals with different magnetic properties by adjusting the tilt angle of the magnetic system, based on the difference in the magnitude of the magnetic force experienced by different magnetic minerals in the sorting tank (while the force experienced by the magnetic minerals themselves remains constant, unlike the magnetic force experienced by non-uniform magnetic fields which continuously increases), thereby effectively improving the sorting accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0024] Figure 4 This is a schematic diagram of the structure of the magnetic pole head of this utility model.

[0025] Figure 5 This is a schematic diagram of the sorting tank of this utility model.

[0026] Figure 6 This is a schematic diagram of the magnetic field distribution of this utility model.

[0027] Figure 7 This is a schematic diagram illustrating the force analysis of non-magnetic minerals when using the magnetic system of this invention for the separation of magnetic minerals.

[0028] Figure 8 This is a schematic diagram illustrating the force analysis of magnetic minerals when using the magnetic system of this invention for magnetic mineral sorting.

[0029] Figure 9 This is a schematic diagram illustrating the force analysis of weakly magnetic minerals when using the magnetic system of this invention for sorting different magnetic minerals.

[0030] Figure 10 This is a schematic diagram illustrating the force analysis of strongly magnetic minerals when using the magnetic system of this invention for sorting different magnetic minerals.

[0031] In the attached diagram, the numbers are: 1 for the magnetic pole head, 11 for the first arc-shaped protrusion, and 12 for the second arc-shaped protrusion; 21 is the first magnetic block, 22 is the second magnetic block, and 23 is the third magnetic block; 31 is the upper cylinder and 32 is the lower cylinder. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-10 As shown, this embodiment provides a permanent magnet system with an equal magnetic field, including two symmetrically arranged magnetic pole groups. Each magnetic pole group includes a magnetic pole head 1 and a reinforcing magnetic block group. The magnetic pole head 1 is used to generate an equal magnetic field. The width of the magnetic pole head 1 is L and the height is H, so 2≤H / L≤3. A first arc-shaped protrusion 11 and a second arc-shaped protrusion 12 are fixedly arranged on opposite sides of the magnetic pole head 1. Both magnetic pole heads 1 are quadrangular prism structures and are integrally formed with the corresponding first arc-shaped protrusion 11 and second arc-shaped protrusion 12. Further, the magnetic pole head 1 and the corresponding first arc-shaped protrusion 11 and second arc-shaped protrusion 12 are columnar structures with one side arc-shaped made of magnetically conductive material. The magnetic pole head 1 and the corresponding first arc-shaped protrusion 11 and second arc-shaped protrusion 12 are columnar structures with one side arc-shaped made of electrical pure iron, and their height-to-width ratio is 2≤H / L≤3.

[0033] The first arc-shaped protrusion 11 and the second arc-shaped protrusion 12 are tangent to each other and smoothly connected. Thus, the first arc-shaped protrusion 11 and the second arc-shaped protrusion 12 are connected by the tangent point as two arcs with different radii to form an asymmetrical magnetic pole head cross section. The central angle α of the first arc-shaped protrusion 11 and the second arc-shaped protrusion 12 are the same and 20°≤α≤40°. The radius of the first arc-shaped protrusion 11 is R1 and the radius of the second arc-shaped protrusion 12 is R2, 2*R2≤R1≤3*R2.

[0034] The enhanced magnetic block group is used to increase the magnetic field strength in an equal magnetic field. The enhanced magnetic block group includes a first magnetic block 21, a second magnetic block 22, and a third magnetic block 23. The first magnetic block 21 is provided at the ends of the two magnetic pole heads 1 that are far apart. The second magnetic block 22 is provided at both the upper and lower ends of each magnetic pole head 1. The third magnetic block 23 is provided at both the front and rear ends of each magnetic pole head 1. The polarity of the first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 facing the corresponding magnetic pole head 1 is the same. The enhanced magnetic block group is composed of multiple magnetic blocks surrounding the magnetic pole head 1. Specifically, the magnetic pole directions of the first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 surrounding the magnetic pole head 1 are all facing or away from the corresponding magnetic pole head 1. That is, when the magnetic pole directions of multiple magnetic blocks in one side of the enhanced magnetic block group are all facing the corresponding magnetic pole head 1, the magnetic pole directions of multiple magnetic blocks in the other side of the enhanced magnetic block group are all away from the corresponding magnetic pole head 1.

[0035] Specifically, the first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 of one of the reinforcing magnetic block groups are N poles on the side closest to the corresponding magnetic pole head 1, while the first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 of the other reinforcing magnetic block group are S poles on the side closest to the corresponding magnetic pole head 1. Thus, a uniform closed magnetic field is formed between the two magnetic pole groups (between the two magnetic pole heads 1).

[0036] The first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 are all cylindrical structures made of magnetic materials. The first magnetic block 21, the second magnetic block 22, and the third magnetic block 23 are all cylindrical structures made of ferrite or neodymium iron boron. By strengthening the multiple magnetic blocks of the magnetic block group, the magnetic field strength between the two magnetic pole heads 1 is guaranteed, and the distance between the two magnetic pole heads 1 can be adjusted as needed to further facilitate the adjustment of the magnetic field strength in the isomagnetic field region.

[0037] The isomagnetic field is located between the two first arc-shaped protrusions 11, and the distance between the isomagnetic field and the side of the first arc-shaped protrusion 11 away from the second arc-shaped protrusion 12 is 0.1*R1-0.45*R1. Furthermore, the specific location of the isomagnetic field within this region can be further determined through simulation using JMAG-Designer (JMAG-Designer is an advanced finite element analysis software specifically designed for electromagnetic field simulation and motor design; it is widely popular in the industry, especially in the design and optimization of motors and transformers. The software's strength lies in its high accuracy and efficient computational capabilities; through simulation analysis, engineers can shorten development cycles and improve product performance).

[0038] In one possible implementation, the radius R1 of the first arc-shaped protrusion 11 and the radius R2 of the second arc-shaped protrusion 12 are 300mm and 150mm respectively, the central angle α is 25°, the distance between the two magnetic pole heads 1 is 80mm, the height H is 400mm, the width L is 190mm, the first magnetic block 21 is a cuboid structure of 190mm*50mm*400mm, the second magnetic block 22 is a cuboid structure of 190mm*50mm*50mm, and the third magnetic block 23 is a cuboid structure of 50mm*50mm*400mm. Thus, it can be determined that the distance between the corresponding generated equal magnetic field and the side of the first arc-shaped protrusion 11 away from the second arc-shaped protrusion 12 is between 40mm and 125mm. At this time, the height of the sorting groove corresponds to the magnetic pole head 1, and the length is set to 80mm*15mm to ensure that it is located in the equal magnetic field area and in the middle position between the two magnetic pole heads 1.

[0039] A sorting tank is provided between the two magnetic pole groups. The sorting tank is located in the equimagnetic field. The sorting tank includes an upper cylinder 31 and two lower cylinders 32. The upper cylinder 31 is located between two first arc-shaped protrusions 11. Two lower cylinders 32 are fixedly provided at the lower end of the upper cylinder 31. The upper sides of the two lower cylinders 32 are connected to the interior of the upper cylinder 31. Each lower cylinder 32 is provided with a valve. When performing magnetic mineral sorting, the valve is opened, and the minerals fall from above the upper cylinder 31. The magnetic minerals are separated from the non-magnetic minerals under the action of the magnetic field. Then, the magnetic minerals and non-magnetic minerals fall from the two lower cylinders 32 into different containers to achieve mineral sorting.

[0040] This invention uses a sorting tank to limit the minerals to be sorted, and at the same time uses the magnetic field between two magnetic pole heads 1 to achieve the sorting of the minerals. Through the specially designed magnetic pole shape, an equal magnetic field is formed between the two first arc-shaped protrusions 11, so that the magnetic force on the magnetic minerals remains unchanged in the equal magnetic field. In use, first adjust the angle of the permanent magnet system with equal magnetic field described in this invention to make it tilt (in the vertical state, first tilt left and right, then tilt forward and backward), and then perform a force analysis on the sorted minerals, such as... Figure 7 The diagram shows a force analysis of a non-magnetic mineral. Gravity is decomposed into three gravitational components, G1, G2, and G3. G1 is equal in magnitude and opposite in direction to the supporting force F1 on the lower side wall of the upper cylinder 31. G2 is equal in magnitude and opposite in direction to the supporting force F2 on the front side wall of the upper cylinder 31. Under the action of G3, the non-magnetic mineral rolls downwards. Figure 7 In the middle, F1=G1, F2=G2): like Figure 8 The diagram shows a force analysis of magnetic minerals. When the magnetic force F acting on a magnetic mineral is greater than the gravitational component G2 (the magnetic force F and the gravitational component G2 are in opposite directions, and F > G2, so the magnetic mineral is not affected by F2), the magnetic mineral separates from the non-magnetic mineral. The non-magnetic mineral (G1 and the supporting force F1 of the lower side wall of the upper cylinder 31 are equal in magnitude and opposite in direction, and G2 and the supporting force F2 of the front side wall of the upper cylinder 31 are equal in magnitude and opposite in direction) falls along the lower side wall of the upper cylinder 31 (near the front side wall of the upper cylinder 31) under the action of the gravitational component G3. The magnetic mineral falls along the rear side of the upper cylinder 31 under the action of the magnetic force F and the gravitational component G3, and enters different lower cylinders 32 respectively, thus achieving the separation of magnetic minerals. Figure 8 In the given information, F1 = G1, F > G2.

[0041] Based on the above, when it is necessary to separate different magnetic minerals, the strength of the magnetic field and the tilt angle of the magnetic system are adjusted (adjusting the magnetic field strength adjusts the magnitude of the magnetic force on the magnetic minerals, and adjusting the tilt angle of the magnetic system adjusts the magnitude of the force components in different directions on the minerals). At this time, such as... Figure 9 As shown, the resultant force of the magnetic force F and the supporting force F2 of the front side wall of the upper cylinder 31 is equal in magnitude and opposite in direction to the gravitational separation force G2. Consequently, the weakly magnetic mineral falls along the lower side wall of the upper cylinder 31 (near the front side wall of the upper cylinder 31) under the action of G3. Figure 9 In the equation, F1=G1, F2+F=G2). like Figure 10 As shown, the magnetic force F acting on the strongly magnetic mineral is greater than the gravitational component G2. Therefore, the strongly magnetic mineral is not supported by the force F2 from the front wall of the upper cylinder 31. Under the action of the magnetic force F and the gravitational component G3, it falls along the lower wall of the upper cylinder 31 (near the inner rear side of the upper cylinder 31). Figure 10 In the given information, F1 = G1, F > G2). Then, the strongly magnetic minerals and the weakly magnetic minerals fall into the two lower cylinders 32 respectively, thus achieving the separation of different magnetic minerals.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A permanent magnet system with an equal magnetic field, characterized in that, It includes two symmetrically arranged magnetic pole groups, each of which includes a magnetic pole head (1) and an enhancing magnetic block group. The magnetic pole head (1) is used to generate an equimagnetic field, and the enhancing magnetic block group is used to increase the magnetic field strength within the equimagnetic field. The width of the magnetic pole head (1) is L and the height is H, then 2≤H / L≤3. The magnetic pole head is fixedly provided with a first arc-shaped protrusion (11) and a second arc-shaped protrusion (12) on opposite sides. The protruding parts of the first arc-shaped protrusion (11) and the second arc-shaped protrusion (12) are tangent and smoothly connected. The central angle α of the first arc-shaped protrusion (11) and the second arc-shaped protrusion (12) are the same and 20°≤α≤40°. The radius of the first arc-shaped protrusion (11) is R1 and the radius of the second arc-shaped protrusion (12) is R2, 2*R2≤R1≤3*R2; The equimagnetic field is located between the two first arc-shaped protrusions (11), and the distance between the first arc-shaped protrusion (11) and the side away from the second arc-shaped protrusion (12) is 0.1*R1-0.45*R1.

2. The permanent magnet system with an equal magnetic field according to claim 1, characterized in that, The enhanced magnetic block group includes a first magnetic block (21), a second magnetic block (22) and a third magnetic block (23). The first magnetic block (21) is provided at the ends of the two magnetic pole heads (1) that are far apart. The second magnetic block (22) is provided at both the upper and lower ends of each magnetic pole head (1). The third magnetic block (23) is provided at both the front and rear ends of each magnetic pole head (1). The first magnetic block (21), the second magnetic block (22) and the third magnetic block (23) have the same polarity on the side facing the corresponding magnetic pole head (1). In one of the enhanced magnetic block groups, the first magnetic block (21), the second magnetic block (22), and the third magnetic block (23) are N poles on the side closest to the corresponding magnetic pole head (1), while in the other enhanced magnetic block group, the first magnetic block (21), the second magnetic block (22), and the third magnetic block (23) are S poles on the side closest to the corresponding magnetic pole head (1).

3. A permanent magnet system with an equal magnetic field according to claim 1, characterized in that, Both magnetic pole heads (1) are quadrangular prism structures, and they are integrally formed with the corresponding first arc-shaped protrusion (11) and second arc-shaped protrusion (12).

4. A permanent magnet system with an equal magnetic field according to claim 1, characterized in that, The radius R1 of the first arc-shaped protrusion (11) and the radius R2 of the second arc-shaped protrusion (12) are 300mm and 150mm respectively, and the central angle α is 25°.

5. A permanent magnet system with an equal magnetic field according to claim 4, characterized in that, The distance between the two magnetic pole heads (1) is 80 mm, the height H is 400 mm, and the width L is 190 mm.

6. A permanent magnet system with an equal magnetic field according to claim 2, characterized in that, The first magnetic block (21) is a cuboid structure with dimensions of 190mm*50mm*400mm, the second magnetic block (22) is a cuboid structure with dimensions of 190mm*50mm*50mm, and the third magnetic block (23) is a cuboid structure with dimensions of 50mm*50mm*400mm.

7. A permanent magnet system with an equal magnetic field according to claim 1, characterized in that, A sorting tank is provided between the two magnetic pole groups. The sorting tank is located in the equal magnetic field. The sorting tank includes an upper cylinder (31) and two lower cylinders (32). The upper cylinder (31) is located between two first arc-shaped protrusions (11). Two lower cylinders (32) are fixedly provided at the lower end of the upper cylinder (31). The upper side of the two lower cylinders (32) is connected to the interior of the upper cylinder (31). A valve is provided on each of the lower cylinders (32).

8. A permanent magnet system with an equal magnetic field according to claim 1, characterized in that, The magnetic pole head (1) and the corresponding first arc-shaped protrusion (11) and second arc-shaped protrusion (12) are columnar structures with one side arc-shaped, made of electrical pure iron.

9. A permanent magnet system with an equal magnetic field according to claim 2, characterized in that, The first magnetic block (21), the second magnetic block (22), and the third magnetic block (23) are all cylindrical structures made of magnetic materials.

10. A permanent magnet system with an equal magnetic field according to claim 9, characterized in that, The first magnetic block (21), the second magnetic block (22), and the third magnetic block (23) are all cylindrical structures made of ferrite or neodymium iron boron.

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