A permanent magnet magnetic separator

Abstract

This utility model relates to the field of magnetic separation equipment technology, and more particularly to a permanent magnet magnetic separation column. It includes a separation cylinder and a support frame. A water inlet pipe is provided inside the separation cylinder, with its end extending out of the separation cylinder and connecting to an external water supply device. Multiple layers of moving magnetic pole groups are sequentially arranged on the support frame from top to bottom. Each static magnetic pole group includes a first permanent magnet positioned opposite each other on both sides of the separation cylinder, with opposite polarities on opposite sides. Each layer of moving magnetic pole groups includes a second permanent magnet positioned opposite each other on both sides of the separation cylinder, with opposite polarities on opposite sides. When the second permanent magnets in each layer of moving magnetic pole groups are opposite each other, the magnetic field direction is the same. The second permanent magnets are rotatably mounted on the support frame, with opposite rotation directions for each layer of second permanent magnets positioned opposite each other on both sides of the separation cylinder. The periodically dynamically changing magnetic field inside the separation cylinder causes mineral particles to periodically agglomerate and disperse within the separation cylinder, achieving the separation of magnetic minerals from non-magnetic minerals and improving the separation quality of magnetic minerals by the magnetic separation column.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separation equipment technology, and in particular to a permanent magnet magnetic separation column. Background Technology

[0002] my country has a large demand for iron concentrate. Currently, magnetic separation technology is widely used in the field of iron ore beneficiation. Magnetic separation technology is a relatively economical and clean way to separate iron concentrate.

[0003] Magnetic separation columns, a common type of iron ore beneficiation equipment in existing magnetic separation technologies, belong to the category of weak magnetic gravity separators. In these columns, the magnetic mineral particles move in the opposite direction to the water flow. The iron concentrate is discharged from the bottom of the column following the direction of the magnetic system, while gangue minerals mixed in are discharged from the top of the column under the impact of the water flow, thus obtaining high-grade iron concentrate.

[0004] Existing magnetic separation columns commonly use electromagnetic coils as the magnetic source. However, when electromagnetic coils are used as the magnetic source, the movement of the magnetic clusters formed by the agglomeration of magnetic mineral particles is relatively stable, which makes it impossible to fully disperse the non-magnetic mineral particles in the magnetic clusters. The non-magnetic mineral particles mixed in the magnetic clusters will be discharged from the bottom of the magnetic separation column along with the magnetic clusters, resulting in insufficient separation quality of the iron concentrate separated by the magnetic separation column. Summary of the Invention

[0005] To address the problem of insufficient separation quality of magnetic minerals by existing magnetic separation columns, this invention proposes a permanent magnet magnetic separation column. The periodically dynamically changing magnetic field inside the separation cylinder causes mineral particles to periodically agglomerate and disperse within the cylinder, achieving the separation of magnetic and non-magnetic minerals, thereby improving the separation quality of magnetic minerals by the magnetic separation column.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A permanent magnet magnetic separator includes a separation cylinder and a support frame. The separation cylinder has an opening at the top and a concentrate outlet at the bottom. A water inlet pipe is installed inside the separation cylinder, with its end extending out of the separation cylinder and connecting to an external water supply device. The support frame surrounds the outside of the separation cylinder and has a static magnetic pole group and multiple moving magnetic pole groups. The static magnetic pole group is located above the moving magnetic pole group. The multiple moving magnetic pole groups are arranged sequentially from top to bottom on the support frame. Each static magnetic pole group includes a first permanent magnet arranged opposite to each other on both sides of the separation cylinder, with opposite polarities on opposite sides. Each moving magnetic pole group includes a second permanent magnet arranged opposite to each other on both sides of the separation cylinder, with opposite polarities on opposite sides. When the second permanent magnets in each moving magnetic pole group are opposite to each other, the magnetic field directions are the same. The second permanent magnets are rotatably mounted on the support frame. A power mechanism is installed on the support frame, driving the second permanent magnets to rotate on the support frame. The rotation directions of the second permanent magnets arranged opposite to each other on both sides of the separation cylinder are opposite. The main function of the static magnetic pole group is to magnetize the mineral particles. The second permanent magnet in the dynamic magnetic pole group rotates under the drive of the power mechanism, which causes the magnetic force on the magnetic clusters to change continuously, causing the magnetic clusters to disperse and agglomerate continuously, thus completing the separation of non-magnetic minerals in the magnetic clusters.

[0008] Preferably, the two adjacent second permanent magnets that are vertically aligned rotate in opposite directions.

[0009] Preferably, the power mechanism is fixed on the support frame, a magnetic yoke is fixed on the output shaft of the power mechanism, and the second permanent magnet is fixed on the magnetic yoke.

[0010] Preferably, the power mechanism can be a speed reducer or a swing cylinder.

[0011] Preferably, an overflow trough is fixed at the upper end of the sorting cylinder, and a tailings outlet is provided on the side of the overflow trough. The upper end of the sorting cylinder extends into the overflow trough, and a feed hopper is fixed at the upper end of the overflow trough. The discharge end of the feed hopper passes through the overflow trough and extends into the sorting cylinder.

[0012] Preferably, a discharge valve is provided at the concentrate outlet.

[0013] Through the above technical solution, the beneficial effects of this utility model are as follows: This utility model uses a permanent magnet to replace the traditional electromagnetic coil, which reduces energy consumption. Compared with magnetic separation columns that use electromagnetic coils, this permanent magnet magnetic separation column can be manufactured into a large-volume device, which can process more slurry at the same time, thereby improving the slurry processing efficiency. This utility model uses a power mechanism to drive the second permanent magnet in the moving magnetic pole group to rotate, which creates a periodically changing magnetic field in the separation cylinder. This causes the magnetic clumps formed after the magnetic mineral particles agglomerate to continuously disperse and agglomerate during the descent. The non-magnetic mineral particles in the magnetic clumps are separated out and move upward under the influence of water. They pass through the upper end of the separation cylinder and enter the overflow trough. The magnetic mineral particles slide downward along the inner side of the separation cylinder under the action of gravity and magnetic force, and finally fall to the concentrate outlet in the non-magnetic zone at the bottom of the separation cylinder. This realizes the separation of non-magnetic minerals mixed in with magnetic minerals and improves the separation quality of magnetic minerals by the magnetic separation column. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a permanent magnet magnetic separator according to the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of a permanent magnet magnetic separator according to the present invention. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the structure of a permanent magnet magnetic separator according to the present invention. Figure 3 .

[0017] In the attached diagram, the following numbers are used: 1 is the sorting cylinder, 2 is the overflow trough, 3 is the feed hopper, 4 is the tailings outlet, 5 is the concentrate outlet, 6 is the water inlet pipe, 7 is the support frame, 8 is the first permanent magnet, 9 is the second permanent magnet, 10 is the magnetic yoke, 11 is the discharge valve, and 12 is the power mechanism. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figures 1-3 As shown, this embodiment provides a permanent magnet magnetic separator column, including a separation cylinder 1 and a support frame 7. The separation cylinder 1 has an opening at the upper end and a concentrate outlet 5 at the lower end. A discharge valve 11 is provided at the concentrate outlet 5. The separation cylinder 1 has a circular cross-section, and the support frame 7 has a square cross-section. An overflow trough 2 is fixed at the upper end of the separation cylinder 1. The bottom wall of the overflow trough 2 is inclined to facilitate the discharge of impurities. A tailings outlet 4 is provided on the side of the overflow trough 2. The tailings outlet 4 is located at the lower end of the bottom wall of the overflow trough 2. The upper end of the separation cylinder 1 extends into the overflow trough 2. A feed hopper 3 is fixed at the upper end of the overflow trough 2. The discharge end of the feed hopper 3 passes through the overflow trough 2 and extends into the separation cylinder 1.

[0020] Furthermore, the sorting cylinder 1 is provided with a water inlet pipe 6, the end of which extends out of the sorting cylinder 1 and connects to an external water supply device. The water inlet pipe 6 is provided with multiple water outlets, with the water outlets facing upwards.

[0021] Furthermore, the square support frame 7 surrounds the outer side of the sorting cylinder 1. The support frame 7 is provided with a static magnetic pole group and multiple layers of moving magnetic pole groups. The static magnetic pole group is located above the moving magnetic pole group. In this embodiment, the moving magnetic pole group has four layers, which are arranged sequentially from top to bottom on the support frame 7. The static magnetic pole group includes first permanent magnets 8 arranged opposite to each other on both sides of the sorting cylinder 1, with opposite polarities on opposite sides. (Refer to...) Figure 2 In this embodiment, the left side of the first permanent magnet 8 relative to the right side of the first permanent magnet 8 in the static magnetic pole group is the S pole, and the right side of the first permanent magnet 8 relative to the left side of the first permanent magnet 8 is the N pole. The mineral particles in the slurry pass through the static magnetic pole group and are magnetized.

[0022] Each layer of the moving magnetic pole group includes a second permanent magnet 9 disposed opposite to each other on both sides of the sorting cylinder 1, with opposite polarities on opposite sides. In each layer of the moving magnetic pole group, the side of the second permanent magnet 9 on the left relative to the second permanent magnet 9 on the right is the S pole, and the side of the second permanent magnet 9 on the right relative to the second permanent magnet 9 on the left is the N pole. When the second permanent magnets 9 in each layer of the moving magnetic pole group are opposite to each other (refer to...), Figure 2 The magnetic field formed by the second layer of moving magnetic poles (from top to bottom) is in the same direction. Therefore, the magnetic mineral particles can overcome the drag force of the water flow and fall downwards under the action of magnetic force and gravity, eventually falling to the concentrate outlet 5. The power mechanism 12 is fixed to the support frame 7 by bolts, the output shaft of the power mechanism 12 passes through the support frame 7 and its end is fixed with a magnetic yoke 10, and the second permanent magnet 9 is fixed to the magnetic yoke 10.

[0023] In this embodiment, the first permanent magnet 8 and the second permanent magnet 9 may be made of neodymium iron boron material.

[0024] The second permanent magnet 9 is rotatably mounted on the support frame 7, and the support frame 7 is provided with a power mechanism 12. In this embodiment, the power mechanism 12 can be a reducer or a swing cylinder. The power mechanism 12 drives the second permanent magnet 9 to rotate on the support frame 7. The rotation directions of the second permanent magnets 9, which are arranged on opposite sides of the sorting cylinder 1 in each layer, are opposite.

[0025] In this embodiment, the second permanent magnet 9, driven by the power mechanism, is in a swinging state with a swing angle of 90 degrees. Figure 2 The first second permanent magnet 9 on the left side, from top to bottom, is in a state after swinging 90 degrees clockwise. After reaching this state, the output end of the power mechanism 12 rotates in the opposite direction, causing the second permanent magnet 9 to rotate 90 degrees counterclockwise and return to its original position. Figure 2The state of the second permanent magnet 9 from top to bottom; in this embodiment, the two adjacent and corresponding second permanent magnets 9 rotate in opposite directions, thereby improving the stirring effect on the magnetic clumps and improving the screening effect on non-magnetic mineral particles.

[0026] The operating process of this device is as follows: The slurry enters the sorting cylinder 1 through the feed hopper 3. An external water supply system supplies water to the inlet pipe 6, with the outlet on the inlet pipe 6 facing upwards, dispersing the slurry. The slurry flows upwards with the water flow. The mineral particles pass through the static magnetic pole group at the top of the sorting cylinder 1, completing the pre-magnetization treatment and moving towards the inner wall of the sorting cylinder 1. Under the influence of gravity and the magnetic force of the moving magnetic pole group, they move downwards. When passing through the moving magnetic pole group, the second permanent magnet 9, which oscillates continuously with the power mechanism, creates a stirring effect, thereby agitating the magnetic particles. The magnetic clusters formed by the particles continuously disperse and agglomerate, causing non-magnetic or weakly magnetic mineral particles in the clusters to detach. The non-magnetic or weakly magnetic mineral particles move upward under the influence of water, pass through the upper end of the separation cylinder 1 and enter the overflow trough 2. The magnetic mineral particles slide downward along the inner side of the separation cylinder 1 under the action of gravity and magnetic force, and finally fall into the concentrate outlet 5 at the bottom of the separation cylinder 1 in the non-magnetic zone. This achieves the separation of non-magnetic minerals and weakly magnetic minerals mixed in with magnetic minerals, and improves the screening effect of high-grade iron concentrate.

[0027] 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 magnetic separator, comprising a separator (1) and a support frame (7), wherein the separator (1) has an opening at its upper end and a concentrate outlet (5) at its lower end, and a water inlet pipe (6) is provided inside the separator (1), the end of the water inlet pipe (6) extending out of the separator (1) and connected to an external water supply device, characterized in that, The support frame (7) surrounds the outside of the sorting cylinder (1). The support frame (7) is provided with a static magnetic pole group and a multi-layer moving magnetic pole group. The static magnetic pole group is located above the moving magnetic pole group. The multi-layer moving magnetic pole group is arranged on the support frame (7) from top to bottom. The static magnetic pole group includes a first permanent magnet (8) arranged opposite to each other on both sides of the sorting cylinder (1), with opposite polarities on opposite sides. Each layer of the moving magnetic pole group includes a second permanent magnet (9) arranged opposite to each other on both sides of the sorting cylinder (1), with opposite polarities on opposite sides. When the second permanent magnet (9) in each layer of the moving magnetic pole group is opposite, the magnetic field direction formed is the same. The second permanent magnet (9) is rotatably arranged on the support frame (7). The support frame (7) is provided with a power mechanism (12). The power mechanism (12) drives the second permanent magnet (9) to rotate on the support frame (7). The rotation direction of the second permanent magnet (9) arranged opposite to each other on both sides of the sorting cylinder (1) is opposite.

2. A permanent magnetic cobber column according to claim 1, characterized in that The two adjacent second permanent magnets (9) rotate in opposite directions.

3. A permanent magnetic cobber column as claimed in claim 1 wherein, The power mechanism (12) is fixed on the support frame (7), and a magnetic yoke (10) is fixed on the output shaft of the power mechanism (12). The second permanent magnet (9) is fixed on the magnetic yoke (10).

4. A permanent magnetic cobber column as claimed in claim 1 wherein, The power mechanism (12) can be a speed reducer or a swing cylinder.

5. A permanent magnetic cobber column as claimed in claim 1 wherein, The upper end of the sorting cylinder (1) is fixed with an overflow trough (2), and the side of the overflow trough (2) is provided with a tailings outlet (4). The upper end of the sorting cylinder (1) extends into the overflow trough (2), and the upper end of the overflow trough (2) is fixed with a feed hopper (3). The discharge end of the feed hopper (3) passes through the overflow trough (2) and extends into the sorting cylinder (1).

6. A permanent magnetic cobber column as claimed in claim 1 wherein, A discharge valve (11) is provided at the concentrate outlet (5).

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