Dry fluidized separation magnetic separator for fine ores

Abstract

The application discloses a kind of powder ore dry fluidization separation magnetic separators, it is related to mineral processing equipment technical field, including non-magnetic ore bucket, magnetic ore bucket, non-magnetic mineral and magnetic mineral, further include: mineral separation adjusting plate, electromagnetic flat plate, permanent magnet cylinder type magnetic roller and vibrating feeder, electromagnetic flat plate includes: flat plate frame, support adjusting mechanism, connecting plate, excitation coil, transmission reduction motor and transport belt.The application is sequentially turned on and off by excitation coil, so that the looseness between particles is improved, and therefore the non-magnetic particles carried by magnetic agglomeration can be separated from the magnetic particles, thereby greatly reducing the magnetic particle inclusions, achieving the effect of effective separation, as the magnetic mineral is about to leave the electromagnetic flat plate force range, the particle trajectory is changed by the permanent magnet cylinder type magnetic roller, so that the magnetic mineral particles are far away from the non-magnetic mineral particles, to obtain high-quality magnetic concentrate.

Description

Technical Field

[0001] This invention relates to the field of mineral processing equipment technology, specifically a dry fluidized bed magnetic separator for powdered ore. Background Technology

[0002] Magnetic separation technology utilizes the differences in magnetic properties to achieve separation, offering advantages such as large processing capacity and environmental friendliness (no additives required), and is widely used in mining, metallurgy, environmental protection, and food industries. However, while current wet magnetic separation technology achieves good separation results, it is highly dependent on water resources, requiring 4-5 tons of water per ton of iron concentrate. Furthermore, the concentrate requires dewatering, and tailings ponds also negatively impact the environment. Traditional dry magnetic separators suffer from poor separation of magnetic and non-magnetic minerals, and are susceptible to agglomeration and magnetic clumping due to interparticle forces. Even with multiple magnetic tumbling cycles using multi-pole arrays, the problem of magnetic clumping cannot be completely resolved. Because the trajectories of magnetic and non-magnetic mineral particles do not change after the magnetic chains are opened, they re-adhere together, especially for fine mineral particles with high surface activity, leading to severe agglomeration and even worse separation efficiency. Therefore, a dry fluidized bed magnetic separator for powdered ore is urgently needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide a dry fluidized bed magnetic separator for fine minerals to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A dry fluidized bed magnetic separator for powdered ore includes a non-magnetic ore hopper, a magnetic ore hopper, non-magnetic minerals, and magnetic minerals. The non-magnetic ore hopper is used to collect non-magnetic minerals, and the magnetic ore hopper is used to collect magnetic minerals. The separator also includes:

[0006] The ore separation regulating plate is located between the non-magnetic ore hopper and the magnetic ore hopper to separate the two ore hoppers.

[0007] An electromagnetic plate, positioned above a non-magnetic ore bucket, comprises: a plate frame; a support and adjustment mechanism connected at one end to the plate frame; a connecting plate connected to the other end of the support and adjustment mechanism; excitation coils connected to the connecting plate, wherein several sets of excitation coils are arranged longitudinally along the connecting plate; a drive reduction motor connected to the connecting plate; and a conveyor belt rotatably connected to the connecting plate and connected to the output end of the drive reduction motor.

[0008] A permanent magnet cylindrical magnetic roller, connected to an electromagnetic plate and positioned above a magnetic ore hopper, is used to separate non-magnetic and magnetic minerals.

[0009] A vibrating feeder, connected to an electromagnetic plate, is used for feeding non-magnetic and magnetic minerals.

[0010] As a further aspect of the present invention: the support adjustment mechanism includes:

[0011] The left support base is connected to the flatbed frame at one end and hinged to the connecting plate at the other end.

[0012] Slope adjustment device, connected to the flatbed frame;

[0013] The right support seat is threaded to the slope adjustment device at one end and hinged to the connecting plate at the other end.

[0014] The belt tension adjustment device has one end connected to the connecting plate and the other end abutting against the conveyor belt, and is used to adjust the tension of the conveyor belt.

[0015] As a further aspect of the present invention: the permanent magnet cylindrical magnetic roller includes:

[0016] The magnetic roller frame is connected to the flatbed frame.

[0017] The magnetic roller motor is connected to the magnetic roller frame.

[0018] A coupling is connected to the output end of a magnetic roller motor; the coupling is equipped with a shaft.

[0019] The bearing housing is connected to the magnetic roller frame;

[0020] The bearing sleeve is rotatably connected to the bearing housing and also to the shaft.

[0021] End cap, connected to the bearing sleeve;

[0022] A hollow shaft, rotatably connected to a shaft rod and also connected to a bearing housing;

[0023] Permanent magnet cylinder, connected to end cap;

[0024] A permanent magnet system connected to a hollow shaft.

[0025] As a further aspect of the present invention: the permanent magnet system includes:

[0026] The magnetic yoke is connected to the hollow shaft.

[0027] The main magnet is connected to the yoke. The main magnet is provided in several groups and arranged around the hollow shaft to form an arc surface.

[0028] An auxiliary magnet is connected to the yoke and located between the two sets of main magnets, the number of which is the same as the number of main magnets.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] This invention utilizes the downward magnetic force of the electromagnetic plate, the downward dispersion gravity of particles, and the AGA effect to create a comprehensive force field, thereby enhancing the advantages of dry magnetic separation. By sequentially switching the excitation coils on and off (each time a coil passes, an AGA effect of agglomeration-dispersion-agglomeration is formed), the looseness between particles is increased. Therefore, non-magnetic particles trapped by magnetic agglomeration can be separated from magnetic particles, significantly reducing magnetic particle inclusions and achieving effective separation. Just as the magnetic minerals are about to leave the range of the electromagnetic plate force, a permanent magnet drum roller alters the particle trajectory, causing the magnetic mineral particles to move away from the non-magnetic mineral particles, thus obtaining high-quality magnetic concentrate. This magnetic separator can effectively separate various fine-grained weakly magnetic ores, is particularly suitable for dry magnetic separation of powder ores, and has strong adaptability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a dry fluidized bed magnetic separator for ore powder in an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the permanent magnet cylindrical magnetic roller in an embodiment of the present invention.

[0033] Figure 3 This is a top view of the permanent magnet cylindrical magnetic roller in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the electromagnetic flat plate in an embodiment of the present invention.

[0035] Figure 5 This is a diagram showing the arrangement of the excitation coils in an embodiment of the present invention.

[0036] In the diagram: 1. Electromagnetic flat plate; 2. Permanent magnet cylindrical magnetic roller; 3. Vibrating feeder; 4. Ore distribution regulating plate; 5. Non-magnetic ore hopper; 6. Magnetic ore hopper; 7. Non-magnetic mineral; 8. Magnetic mineral; 1-1. Flat plate frame; 1-2. Connecting plate; 1-3. Excitation coil; 1-4. Belt tension adjusting device; 1-5. Drive geared motor; 1-6. Left support seat; 1-7. Conveyor belt; 1-8. Slope adjusting device; 1-9. Right support seat; 1-3-1. First excitation coil; 1-3-2, Second excitation coil; 1-3-3, Third excitation coil; 1-3-4, Fourth excitation coil; 1-3-N, Nth excitation coil; 2-1, Main magnet; 2-2, Magnetic yoke; 2-3, Auxiliary magnet; 2-4, Hollow shaft; 2-5, Magnetic roller frame; 2-6, Permanent magnet cylinder; 2-7, Magnetic roller motor; 2-8, Permanent magnet system; 2-9, Bearing housing; 2-10, Bearing sleeve; 2-11, End cover; 2-12, Coupling. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the embodiments of this invention, please refer to Figures 1 to 5 A dry fluidized bed magnetic separator for powdered ore includes a non-magnetic ore hopper 5, a magnetic ore hopper 6, non-magnetic minerals 7 and magnetic minerals 8. The non-magnetic ore hopper 5 is used to collect the non-magnetic minerals 7, and the magnetic ore hopper 6 is used to collect the magnetic minerals 8. The separator also includes:

[0039] The ore separating regulating plate 4 is located between the non-magnetic ore hopper 5 and the magnetic ore hopper 6, and is used to separate the non-magnetic ore hopper 5 and the magnetic ore hopper 6.

[0040] An electromagnetic plate 1 is positioned above a non-magnetic ore hopper 5. The electromagnetic plate 1 includes: a plate frame 1-1; a support and adjustment mechanism, one end of which is connected to the plate frame 1-1; a connecting plate 1-2, connected to the other end of the support and adjustment mechanism; an excitation coil 1-3, connected to the connecting plate 1-2, wherein several groups of the excitation coil 1-3 are arranged longitudinally along the connecting plate 1-2; a transmission reduction motor 1-5, connected to the connecting plate 1-2; and a conveyor belt 1-7, rotatably connected to the connecting plate 1-2 and connected to the output end of the transmission reduction motor 1-5.

[0041] The permanent magnet cylindrical magnetic roller 2 is connected to the electromagnetic plate 1 and is located above the magnetic ore hopper 6, and is used to separate non-magnetic minerals 7 and magnetic minerals 8.

[0042] The vibrating feeder 3 is connected to the electromagnetic plate 1 and is used to feed non-magnetic minerals 7 and magnetic minerals 8.

[0043] In this embodiment, the electromagnetic plate 1 is designed to be perpendicular to the ground so that the mineral particles disperse and settle downwards under their own gravity; there are 2 to 10 excitation coils 1-3, and several sets of excitation coils 1-3 can be connected in parallel or in series.

[0044] In this embodiment, the excitation coils 1-3 are supplied with direct current to generate a magnetic field, and the excitation method is high current and low voltage. The excitation coils 1-3 are made of copper or aluminum wire, with 100 to 2000 turns. Each coil is arranged along the axial direction and connected to the excitation power supply. The outer surface of the copper or aluminum wire is covered with a heat shrink tubing that can withstand temperatures of 120 to 200°C. The current adjustment range is 0 to 1000A, the corresponding voltage is 0 to 25V, the excitation power is 0 to 25kW, and the generated magnetic field strength is 0 to 1T.

[0045] The support and adjustment mechanism supports the conveyor belt 1-7 and adjusts its angle according to the particle size of the mineral particles to be sorted. The drive reduction motor 1-5 is activated, driving the conveyor belt 1-7 to rotate and adjusting its speed. The mineral particles to be sorted are placed inside the vibrating feeder 3, and the vibrating feeder 3 is activated. Under the action of the vibrating feeder 3 and its own gravity, the mineral particles to be sorted move longitudinally in a fluidized state. Magnetic particles move towards the electromagnetic plate 1 under the magnetic force generated by the first excitation coil 1-3-1. During this process, some non-magnetic mineral particles are carried towards the electromagnetic plate 1 by the magnetic chains formed by the magnetic mineral particles, while most of the non-magnetic particles move towards the non-magnetic hopper 5 under gravity, thus achieving the separation of magnetic and non-magnetic minerals. The first excitation coil 1-3-1 is de-energized after reaching the set value, and the second... When excitation coil 1-3-2 is energized, the first magnetic agglomeration disperses under gravity due to the de-energization of the first excitation coil 1-3-1. At this time, some non-magnetic particles escape from the magnetic agglomeration and sink into the non-magnetic ore hopper 5, thus increasing the iron concentrate grade for the second time. After the dispersed mineral particles reach the adsorption zone of the second excitation coil 1-3-2, they form a second magnetic agglomeration. When the second excitation coil 1-3-2 reaches the set time, it is de-energized, and the third excitation coil 1-3-3 is energized. The second magnetic agglomeration repeats the first magnetic agglomeration process, and so on, continuously increasing the iron concentrate grade. After the last excitation coil 1-3-N is de-energized, the magnetic mineral particles continue to disperse downward and are adsorbed by the permanent magnet cylindrical magnetic roller 2 located below the electromagnetic plate 1, thus changing their trajectory and deviating from their original path. Under the action of the permanent magnet cylindrical magnetic roller 2, they enter the magnetic hopper 6, thereby achieving the separation of magnetic and non-magnetic mineral particles.

[0046] As one embodiment of the present invention, please refer to Figure 4 The support adjustment mechanism includes:

[0047] The left support seat 1-6 is connected at one end to the flat panel frame 1-1 and at the other end to the connecting plate 1-2;

[0048] Slope adjustment device 1-8 is connected to flatbed frame 1-1;

[0049] The right support seat 1-9 is threaded at one end to the slope adjustment device 1-8 and hinged at the other end to the connecting plate 1-2;

[0050] The belt tension adjustment device 1-4 is connected to the connecting plate 1-2 at one end and abuts against the conveyor belt 1-7 at the other end, and is used to adjust the tension of the conveyor belt 1-7.

[0051] The left support seat 1-6 and the right support seat 1-9 support the connecting plate 1-2, which in turn supports the conveyor belt 1-7. The slope adjustment device 1-8 adjusts the right support seat 1-9, which in turn adjusts the conveying angle of the conveyor belt 1-7. The belt tension adjustment device 1-4 adjusts the tension of the conveyor belt 1-7. When the conveyor belt 1-7 is damaged, it can also be replaced through the belt tension adjustment device 1-4.

[0052] As one embodiment of the present invention, please refer to Figures 1 to 3 The permanent magnet cylindrical magnetic roller 2 includes:

[0053] Magnetic roller frame 2-5 is connected to flat plate frame 1-1;

[0054] Magnetic roller motor 2-7 is connected to magnetic roller frame 2-5;

[0055] Coupling 2-12 is connected to the output end of magnetic roller motor 2-7. The coupling 2-12 is provided with a shaft.

[0056] Bearing housing 2-9 is connected to magnetic roller frame 2-5;

[0057] Bearing sleeve 2-10 is rotatably connected to bearing housing 2-9 and also connected to the shaft;

[0058] End cap 2-11 is connected to bearing sleeve 2-10;

[0059] Hollow shaft 2-4 is rotatably connected to the shaft rod and also connected to bearing housing 2-9;

[0060] The permanent magnet cylinder 2-6 is connected to the end cap 2-11;

[0061] The permanent magnet system 2-8 is connected to the hollow shaft 2-4.

[0062] The magnetic roller motor 2-7 drives the coupling 2-12 to rotate, the coupling 2-12 drives the bearing sleeve 2-10 to rotate, the bearing sleeve 2-10 drives the end cover 2-11 to rotate, the end cover 2-11 drives the permanent magnet cylinder 2-6 to rotate, and the permanent magnet system 2-8 generates magnetic attraction force to attract magnetic mineral particles, causing the magnetic mineral particles to move on the permanent magnet cylinder 2-6.

[0063] As one embodiment of the present invention, please refer to Figures 1 to 3 The permanent magnet system 2-8 includes:

[0064] Magnetic yoke 2-2 is connected to hollow shaft 2-4;

[0065] The main magnet 2-1 is connected to the yoke 2-2. The main magnet 2-1 is provided in several groups and arranged around the hollow shaft 2-4 to form an arc surface.

[0066] An auxiliary magnet 2-3 is connected to the yoke 2-2 and is located between the two sets of main magnets 2-1. The number of auxiliary magnets 2-3 is the same as the number of main magnets 2-1.

[0067] In this embodiment, the magnetic field strength is divided into a scanning zone, a feeding zone, and a refining zone from high to low. The area above and below the horizontal axis of the permanent magnet cylinder 2-6 is the feeding zone, the area above the feeding zone is the scanning zone, and the area below the feeding zone is the refining zone. This arrangement facilitates the attraction of weakly magnetic mineral particles to the surface of the permanent magnet cylinder 2-6 in the scanning zone. During the rotational conveying process of the permanent magnet cylinder 2-6, the magnetic mineral particles will not fall off when passing through the feeding zone and the refining zone. At the unloading point at the end of the refining zone, the mineral particles are easily unloaded and fall into the magnetic hopper 6 for collection. To improve the recovery rate of weakly magnetic mineral particles, permanent magnets are used to prevent the distribution of magnetic lines of force in a certain direction, thereby changing the field shape and depth of action of the permanent magnet system. The polarity of the main magnet 2-1 With the same polarity as the adjacent main magnet 2-1, due to the repulsion of like poles and the contribution of the magnetic flux of the repulsive pole magnets, a peak magnetic field strength is generated at the junction of the magnetic pole and the repulsive pole. At the same time, the magnetic pole also has a huge demagnetizing effect on the repulsive pole and the possibility of reverse magnetization. The magnetization direction of the main magnet 2-1 is: the magnetization directions of the adjacent main magnets are antiparallel to each other. The magnetization direction of the auxiliary magnet 2-3 is perpendicular to the magnetization direction of the main magnet 2-1, and the magnetic field generated by the main magnet 2-1 at its upper midpoint is consistent with the magnetic field generated by the adjacent auxiliary magnet 2-3 at that point. At the same time, the magnetic field generated by the auxiliary magnet 2-3 at its upper midpoint is consistent with the magnetic field generated by the adjacent main magnet 2-1 at that point.

[0068] In one embodiment of the present invention, a layer of stainless steel strip is mounted on the surface of the excitation coil 1-3.

[0069] The thickness of the stainless steel strip is 0.2-1mm. The stainless steel strip is used to prevent fine mineral particles from entering the excitation coils 1-3 and causing a short circuit.

[0070] As one embodiment of the present invention, the conveyor belts 1-7 are provided with skirts on both sides.

[0071] The skirt height is 1-10mm. The skirt is designed to prevent mineral particles from falling off both sides of the conveyor belts 1-7.

[0072] The working principle of this invention is as follows: the left support seat 1-6 and the right support seat 1-9 support the connecting plate 1-2, thereby supporting the conveyor belt 1-7; the rotation slope adjustment device 1-8 adjusts the right support seat 1-9, thereby adjusting the conveying angle of the conveyor belt 1-7; and the belt tension adjustment device 1-4 adjusts the tension of the conveyor belt 1-7.

[0073] Turn on the transmission reduction motor 1-5, which drives the conveyor belt 1-7 to rotate and adjusts the speed of the conveyor belt 1-7. Place the mineral particles to be sorted inside the vibrating feeder 3 and start the vibrating feeder 3. Under the action of the vibrating feeder 3 and its own gravity, the mineral particles to be sorted move longitudinally in a fluidized form.

[0074] Magnetic particles move towards electromagnetic plate 1 under the magnetic force generated by the first excitation coil 1-3-1. During this process, some non-magnetic mineral particles are carried towards electromagnetic plate 1 by the magnetic chains formed by the magnetic mineral particles, while most of the non-magnetic particles move towards the non-magnetic hopper 5 under the influence of gravity, thus achieving the separation of magnetic and non-magnetic minerals. After the first excitation coil 1-3-1 is energized for a set time, it is de-energized, and the second excitation coil 1-3-2 is energized. The first magnetic agglomeration disperses under the influence of gravity because the first excitation coil 1-3-1 is de-energized. At this point, some non-magnetic particles escape from the magnetic agglomeration and sink downwards into the non-magnetic ore hopper 5, thus increasing the iron concentrate grade for the second time. After the dispersed mineral particles reach the adsorption zone of the second excitation coil 1-3-2, they form a second magnetic agglomeration. When the second excitation coil 1-3-2 reaches the set time, it is de-energized, and the third excitation coil 1-3-3 is energized. The second magnetic agglomeration repeats the first magnetic agglomeration process, and so on, continuously increasing the iron concentrate grade. After the last excitation coil 1-3-N is de-energized, the magnetic mineral particles continue to disperse downwards.

[0075] The magnetic field generated by the main magnet 2-1 and the auxiliary magnet 2-3 adsorbs the magnetic mineral particles onto the permanent magnet cylinder 2-6, thereby changing the trajectory of the magnetic mineral particles and causing them to deviate from their original path. When the magnetic mineral particles move to the unloading point, they are unloaded and fall into the magnetic hopper 6 for collection, thus achieving the separation of magnetic mineral particles from non-magnetic mineral particles.

[0076] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dry fluidized bed magnetic separator for powdered ore, comprising a non-magnetic ore hopper, a magnetic ore hopper, non-magnetic minerals, and magnetic minerals, wherein the non-magnetic ore hopper is used for collecting non-magnetic minerals, and the magnetic ore hopper is used for collecting magnetic minerals, characterized in that... Also includes: The ore separation regulating plate is located between the non-magnetic ore hopper and the magnetic ore hopper to separate the two ore hoppers. An electromagnetic plate, positioned above a non-magnetic ore bucket, comprises: a plate frame; a support and adjustment mechanism connected at one end to the plate frame; a connecting plate connected to the other end of the support and adjustment mechanism; excitation coils connected to the connecting plate, wherein several sets of excitation coils are arranged longitudinally along the connecting plate; a drive reduction motor connected to the connecting plate; and a conveyor belt rotatably connected to the connecting plate and connected to the output end of the drive reduction motor. A permanent magnet cylindrical magnetic roller, connected to an electromagnetic plate and positioned above a magnetic ore hopper, is used to separate non-magnetic and magnetic minerals. A vibrating feeder, connected to an electromagnetic plate, is used for feeding non-magnetic and magnetic minerals. The support adjustment mechanism includes: The left support is connected to the flatbed frame at one end and hinged to the connecting plate at the other end. Slope adjustment device, connected to the flatbed frame; The right support seat is threaded to the slope adjustment device at one end and hinged to the connecting plate at the other end. The belt tension adjustment device has one end connected to the connecting plate and the other end abutting against the conveyor belt, and is used to adjust the tension of the conveyor belt. The permanent magnet cylindrical magnetic roller includes: The magnetic roller frame is connected to the flatbed frame. The magnetic roller motor is connected to the magnetic roller frame. A coupling is connected to the output end of a magnetic roller motor; the coupling is equipped with a shaft. The bearing housing is connected to the magnetic roller frame; The bearing sleeve is rotatably connected to the bearing housing and also to the shaft. End cap, connected to the bearing sleeve; A hollow shaft, rotatably connected to a shaft rod and also connected to a bearing housing; Permanent magnet cylinder, connected to end cap; Permanent magnet system, connected to a hollow shaft; The permanent magnet system includes: The magnetic yoke is connected to the hollow shaft. The main magnet is connected to the yoke. The main magnet is provided in several groups and arranged around the hollow shaft to form an arc surface. An auxiliary magnet is connected to the yoke and located between the two sets of main magnets, the number of which is the same as the number of main magnets; Magnetic particles move towards the electromagnetic plate under the magnetic force generated by the first excitation coil. During this process, some non-magnetic mineral particles are carried towards the electromagnetic plate by the magnetic chains formed by the magnetic mineral particles, while most of the non-magnetic particles move towards the non-magnetic ore bin under the influence of gravity, thus achieving the separation of magnetic and non-magnetic minerals. After the first excitation coil is energized for the set time, it is de-energized, and the second excitation coil is energized. The first magnetic agglomerate disperses under the influence of gravity due to the de-energization of the first excitation coil. At this time, some non-magnetic particles escape from the magnetic agglomerate and sink downwards into the non-magnetic ore bin, thus achieving the second grade of iron concentrate. The process is as follows: After the dispersed mineral particles reach the adsorption zone of the second excitation coil, they form a second magnetic agglomeration. When the second excitation coil reaches the set time, it is de-energized, and the third excitation coil is energized. The second magnetic agglomeration repeats the first magnetic agglomeration process, and so on, continuously improving the grade of iron concentrate. After the last excitation coil is de-energized, the magnetic mineral particles continue to disperse downwards and are adsorbed by the permanent magnet cylindrical magnetic roller located below the electromagnetic plate, thereby changing their trajectory and breaking away from the original path. Under the action of the permanent magnet cylindrical magnetic roller, they enter the magnetic hopper, thus achieving the separation of magnetic mineral particles from non-magnetic mineral particles.

2. The dry fluidized bed magnetic separator for fine ore according to claim 1, characterized in that, A layer of stainless steel strip is installed on the surface of the excitation coil.

3. The dry fluidized bed magnetic separator for fine ore according to claim 1, characterized in that, The conveyor belt has skirts on both sides.

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