Multi-wheel-disc sheet type micro powder magnetic separator and magnetic separation method

Abstract

The magnetic separator comprises a magnetic separator shell, a discharging groove and a magnetic wheel disc assembly, air enters an inner cavity from an air inlet through an air pipe, airflow flows in the inner cavity, and a plurality of magnetic disc pieces are correspondingly arranged in the parts, extending into the inner cavity, of the rotating disc shell in a sleeving mode one to one; magnetic micro-powder particles in airflow are adsorbed on the surfaces of a plurality of rotary disc shells under the action of magnetic field force, treated gas is discharged out of the shells through gas outlets, the rotary disc shells are connected together at intervals in the direction perpendicular to the gas circulation direction, the airflow is divided into a plurality of branches, the sectional area of each airflow is reduced, and the airflow is more uniform. And when each air flow passes through the gap between the upper turntable shell and the lower turntable shell, the magnetic micro powder particles in the air flow are adsorbed on the rear end of the upper turntable shell, the front end of the lower turntable shell and the excircle surface of the turntable shell, so that the adsorption area of the magnetic separator is increased, and the magnetic separation efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material magnetic separation equipment, and in particular to a multi-wheel disc type micro powder magnetic separator and a magnetic separation method. Background Art

[0002] The existing wheel-type micro-powder magnetic separator includes a sorting cylinder and a magnetic system arranged in the sorting cylinder. A trough body is installed under the sorting cylinder. At least part of the magnetic system is arranged in the part of the sorting cylinder close to the trough body. The sorting cylinder is rotated, and the material falls from the inlet and falls onto the sorting cylinder. The sorting cylinder rotates. Under the action of the magnetic system, the screened components are attached to the sorting cylinder, and the unscreened components are discharged from the waste port along with the trough body. When the screened components reach the discharge port of the cylinder, the screened components attached to the sorting cylinder are quickly separated by the flushing nozzle. Since the part of the material that falls and contacts is only the surface of the cylindrical cylinder, the contact area is small, resulting in low efficiency in screening materials.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the shortcomings of the prior art, the embodiments of the present invention disclose a multi-wheel disc type micro powder magnetic separator and a magnetic separation method to solve the problem that the part of the material that falls and contacts is only the surface of the cylindrical barrel, and the contact area is small, resulting in low efficiency in screening materials.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A multi-wheel disc type micro powder magnetic separator comprises:

[0007] The magnetic separator housing has an inner cavity, an air inlet is provided at the bottom end of the magnetic separator housing, gas flows inside the inner cavity, and an air outlet is provided at the top end of the magnetic separator housing;

[0008] A discharge chute, wherein a first end of a side surface of the discharge chute is connected to an outer side of a magnetic separator housing;

[0009] A magnetic wheel assembly, the magnetic wheel assembly comprising a plurality of magnetic disks and a plurality of turntable shells; the turntable shell is a vertically arranged hollow disk body, a plurality of the turntable shells are connected together at intervals perpendicular to the gas flow direction, and all the turntable shells can be rotatably connected around their axes in the discharge chute, and a portion of the turntable shell close to the magnetic separator shell side extends into the inner cavity; a plurality of the magnetic disks are correspondingly sleeved in the portion of the turntable shell extending into the inner cavity, and all the magnetic disks are connected and kept fixed relative to the turntable shell.

[0010] A further technical solution is that there are a plurality of discharge troughs, and the plurality of discharge troughs are longitudinally spaced along the gas flow direction on the outside of the magnetic separator housing, and there are a plurality of magnetic wheel assemblies, and the plurality of magnetic wheel assemblies are arranged in the discharge troughs in a one-to-one correspondence.

[0011] Its further technical solution is that an air flow diversion device is also provided in the magnetic separator housing, and the air flow diversion device is arranged along the gas flow direction. Several discharge troughs are symmetrically arranged on both sides of the magnetic separator housing, and several magnetic wheel assemblies are arranged one by one in the discharge trough. The top and bottom ends of the air flow diversion device are both conical, and there is a gap between the outer wall surface of the air flow diversion device and the inner wall surface of the magnetic separator housing, which separates the inner cavity to form two diversion channels, and the part of the turntable housing extending into the inner cavity is tangent to the outer wall surface of the air flow diversion device.

[0012] A further technical solution is that the magnetic wheel assembly further comprises a fixed shaft, the fixed shaft is fixedly arranged in the discharge chute along a direction perpendicular to the gas flow direction, and one side of a plurality of magnetic disks are fixedly arranged on the fixed shaft at intervals along the axial direction of the fixed shaft;

[0013] The magnetic wheel assembly also includes a rotating shaft cylinder, which is sleeved on the outside of the fixed shaft, and a plurality of turntable shells are arranged at the front and rear ends of the rotating shaft cylinder. The turntable shells are concentric with the rotating shaft cylinder, and the interior of the turntable shells is connected to the interior of the rotating shaft cylinder.

[0014] Its further technical solution is that the magnetic disk includes a first plate and a second plate, the first plate and the second plate have the same circumscribed circle, the circumscribed circle is concentric with the fixed axis and has a clearance fit with the inner wall of the turntable shell, the shape of the first plate corresponds to the part of the circumscribed circle located in the inner cavity, and the shape of the second plate corresponds to the part of the circumscribed circle located in the discharge chute.

[0015] Its further technical solution is that the fixed shaft and the rear end of the rotating shaft cylinder extend out of the rear end of the magnetic separator housing, and the multi-wheel disc-type micro-powder magnetic separator also includes a driving device, which is arranged at the rear end of the magnetic separator housing, and the output end of the driving device is connected to the outer side of the rear end of the rotating shaft cylinder and drives the rotating shaft cylinder to rotate.

[0016] A further technical solution is that a powder discharge port is provided at the bottom end of the discharge chute.

[0017] A further technical solution is that a cleaning device is provided on the inner wall of the discharge trough on the side away from the magnetic separator housing, the top of the cleaning device extends to the rotating shaft cylinder, and the cleaning device contacts the outer surface of the turntable housing and the rotating shaft cylinder, and when the magnetic micropowder particles are driven to rotate to the side away from the magnetic disk, the cleaning device sweeps the magnetic micropowder particles into the discharge trough.

[0018] A magnetic separation method, using the aforementioned micro powder magnetic separator, is characterized by comprising the following steps:

[0019] Air intake: The gas enters the inner cavity from the air inlet through the air duct;

[0020] Secondary flow division: The gas passes through the part of the magnetic wheel assembly extending into the inner cavity, and passes through several gap channels formed between several turntable shells, and the gas is divided into several branches;

[0021] Separation: When the gas passes through the gap channel, the magnetic powder in the gas is adsorbed by the magnetic disk onto the surface of the turntable shell, and the gas continues to flow to the subsequent magnetic wheel assembly for processing;

[0022] Powder discharge: Start the driving device to drive the rotating shaft to rotate toward the outside of the magnetic separator housing, so that the magnetic powder adsorbed on the surface of the turntable housing is away from the magnetic disk. The magnetic powder loses its magnetic force and falls into the discharge trough and is discharged through the powder discharge port;

[0023] Exhaust: The treated gas is discharged from the magnetic separator housing through the outlet.

[0024] A further technical solution is that the air intake step further includes the following steps:

[0025] Primary diversion: The gas passes through the air flow diversion device, the gas is diverted at the air inlet, and the gas carries the micro powder in the diversion channel;

[0026] The step of discharging powder also includes the following steps:

[0027] Cleaning: The magnetic powder remaining on the surface of the turntable shell rotates to the cleaning device, and the remaining magnetic powder is swept into the discharge trough and discharged through the powder discharge port.

[0028] The beneficial effects of the embodiments of the present invention are as follows:

[0029] (1) A multi-wheel disc type micro powder magnetic separator includes a magnetic separator shell, a discharge chute and a magnetic wheel assembly. Gas enters the inner cavity from the air inlet through the air duct, and the air flow flows in the inner cavity. A plurality of magnetic disks are correspondingly sleeved in the part of the turntable shell extending into the inner cavity. The magnetic micro powder particles in the air flow are adsorbed on the surfaces of a plurality of turntable shells under the action of the magnetic field force. The treated gas is discharged from the shell through the air outlet. A plurality of turntable shells are connected together at intervals perpendicular to the gas flow direction to divide the air flow into a plurality of tributaries, thereby reducing the cross-sectional area of ​​each air flow, so that when each air flow passes through the gap between the upper and lower turntable shells, the magnetic micro powder particles in the air flow are adsorbed on the rear end of the upper turntable shell, the front end of the lower turntable shell and the outer cylindrical surface of the turntable shell, thereby increasing the adsorption area of ​​the magnetic separator and improving the magnetic separation efficiency of the device.

[0030] At the same time, the turntable shell rotates toward the outside of the magnetic separator shell, and the magnetic powder particles adsorbed on the turntable shell are driven to rotate. When the magnetic powder particles are driven to rotate to the side away from the magnetic disk, the magnetic powder particles lose their magnetic force and fall into the discharge chute, realizing the automatic separation of the magnetic powder particles and improving the sorting efficiency of the device.

[0031] (ii) Furthermore, an airflow diversion device is provided in the housing of the magnetic separator, and a plurality of magnetic wheel disc assemblies are symmetrically arranged on both sides of the housing of the magnetic separator. The top and bottom ends of the airflow diversion device are both conical, and the airflow diversion device divides the inner cavity into two diversion channels. The portion of the turntable housing extending into the inner cavity is tangent to the outer surface of the airflow diversion device. The airflow diversion device effectively divides the inner cavity into two diversion channels, diverts the columnar airflow entering the inner cavity into two flat airflows, so that the magnetic particles in the airflow fully contact the magnetic wheel disc assembly and are separated, thereby improving the sorting effect of the magnetic particles, reducing the collision or overlap between the particles, and improving the sorting accuracy.

[0032] (III) Furthermore, a cleaning device is provided on the inner wall of the discharge chute on the side away from the magnetic separator housing, and the top of the cleaning device extends to the shaft cylinder. When the magnetic powder particles are driven to rotate to the side away from the magnetic disk, the cleaning device sweeps the magnetic powder particles into the discharge chute. After the magnetic powder particles are adsorbed by the magnetic disk through the turntable housing, as the shaft cylinder rotates, the magnetic powder particles will gradually move away from the magnetic disk, lose their magnetism and fall. The cleaning device is designed to promptly clean the magnetic powder particles adsorbed by the surface of the turntable housing. When the particles are driven to rotate and move away from the magnetic disk, the cleaning device extends to the shaft cylinder through its designed top to help sweep these particles away, prevent the accumulation of particles, and ensure that the magnetic powder can be effectively cleaned after each sorting, and ensure that they will not be retained in the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the main structure of the multi-wheel disc type micro powder magnetic separator of the present invention.

[0034] Figure 2 It is a schematic cross-sectional structure diagram of the turntable housing in the multi-wheel disc type micro powder magnetic separator of the present invention.

[0035] Figure 3 It is a schematic diagram of the longitudinal structure of the magnetic wheel disc assembly in the multi-wheel disc type micro powder magnetic separator of the present invention.

[0036] Figure 4 for Figure 3 Enlarged view at A.

[0037] In the figure:

[0038] 100, magnetic separator housing; 101, inner cavity; 102, air inlet; 103, air outlet; 104, discharge chute; 105, powder discharge port; 200, magnetic wheel assembly; 210, magnetic disk; 220, turntable housing; 230, fixed shaft; 240, shaft cylinder; 300, driving device; 400, air flow diversion device; 500, cleaning device. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0040] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0041] First embodiment:

[0042] This embodiment discloses a multi-wheel disc type micro powder magnetic separator.

[0043] A multi-wheel disc type micro powder magnetic separator comprises a magnetic separator housing 100 , a discharge chute 104 and a magnetic wheel disc assembly 200 .

[0044] Figure 1This is a schematic diagram of the main structure of the multi-wheel disc type powder magnetic separator of the present invention. Figure 1 As shown, the magnetic separator housing 100 has an inner cavity 101 , an air inlet 102 is provided at the bottom end of the magnetic separator housing 100 , gas flows inside the inner cavity 101 , and an air outlet 103 is provided at the top end of the magnetic separator housing 100 .

[0045] like Figure 1 As shown, the first end of the side of the discharge chute 104 is connected to the outside of the magnetic separator housing 100. Exemplarily, a powder discharge port 105 is provided at the bottom end of the discharge chute 104.

[0046] Figure 2 It is a schematic cross-sectional structure diagram of the turntable housing in the multi-wheel disc type micro powder magnetic separator of the present invention. Figure 3 It is a schematic diagram of the longitudinal structure of the magnetic wheel disc assembly in the multi-wheel disc type micro powder magnetic separator of the present invention. Figure 4 for Figure 3 A magnified view of point A. Figures 1 to 4 As shown, the magnetic wheel assembly 200 includes a plurality of magnetic disks 210 and a plurality of turntable shells 220. The turntable shell 220 is a vertically arranged hollow disk body, and a plurality of turntable shells 220 are connected together at intervals perpendicular to the gas flow direction, and all the turntable shells 220 can be rotatably connected to the discharge chute 104 around their axial direction, and a portion of the turntable shell 220 near the magnetic separator shell 100 extends into the inner cavity 101.

[0047] like Figure 3 As shown, a plurality of disks 210 are sleeved one by one in the portion of the turntable housing 220 extending into the inner cavity 101, and all the disks 210 are connected and fixed relative to the turntable housing 220. Exemplarily, the magnetic wheel assembly 200 further includes a fixed shaft 230, which is fixedly arranged in the discharge chute 104 along a direction perpendicular to the gas flow direction, and one side of a plurality of disks 210 is fixedly arranged on the fixed shaft 230 at intervals along the axial direction of the fixed shaft 230. The magnetic wheel assembly 200 further includes a rotating shaft cylinder 240, which is rotatably sleeved on the outer side of the fixed shaft 230, and a plurality of turntable housings 220 are arranged at the front end and the rear end of the rotating shaft cylinder 240, the turntable housing 220 is concentric with the rotating shaft cylinder 240, and the interior of the turntable housing 220 is connected to the interior of the rotating shaft cylinder 240.

[0048] like Figure 2As shown, further, the disk 210 includes a first piece and a second piece, the first piece and the second piece are integrally formed, and have the same circumscribed circle, the circumscribed circle is concentric with the fixed shaft 230 and is in clearance with the inner wall of the turntable housing 220, the shape of the first piece corresponds to the portion of the circumscribed circle located in the inner cavity 101, and the shape of the second piece corresponds to the portion of the circumscribed circle located in the discharge trough 104. Both the first piece and the second piece can adsorb magnetic materials, and adsorb the magnetic materials on the turntable housing 220 by magnetic force, thereby realizing the separation of the magnetic materials, and at the same time, the second piece ensures that the magnetic materials fall off into the discharge trough 104, and when the turntable housing 220 rotates to the second piece and enters the discharge trough 104 area, the magnetic materials fall off from the surface into the discharge trough 104, thereby completing the separation of the magnetic materials.

[0049] like Figure 3 As shown, further, the rear ends of the fixed shaft 230 and the rotating shaft cylinder 240 extend out of the rear end of the magnetic separator housing 100, and the multi-wheel disc type micro powder magnetic separator also includes a driving device 300, which is arranged at the rear end of the magnetic separator housing 100, and the output end of the driving device 300 is connected to the outer side of the rear end of the rotating shaft cylinder 240, and drives the rotating shaft cylinder 240 to rotate. During the magnetic separation process, starting the driving device 300 causes the rotating shaft cylinder 240 to move periodically, thereby realizing the automatic adsorption and separation of the magnetic material by the device.

[0050] This embodiment also discloses a magnetic separation method.

[0051] A magnetic separation method, using the aforementioned micro powder magnetic separator, comprises the following steps:

[0052] Step S1: air intake: gas enters the inner cavity 101 from the air inlet 102 through the air duct;

[0053] Step S2: flow division: when the gas passes through the portion of the magnetic wheel assembly 200 extending into the inner cavity 101, it is divided into a plurality of tributaries by a plurality of gap channels formed between a plurality of turntable shells 220;

[0054] Step S3: separation: when the gas passes through the gap channel, the magnetic powder in the gas is adsorbed on the surface of the turntable housing 220 by the magnetic disk 210, and the gas continues to flow to the subsequent magnetic wheel assembly 200 for processing;

[0055] Step S4: powder discharge: start the driving device 300 to drive the rotating shaft 240 to rotate toward the outside of the magnetic separator housing 100, so that the magnetic powder adsorbed on the surface of the turntable housing 220 is away from the magnetic disk 210, and the magnetic powder loses its magnetic force and falls into the discharge trough 104 and is discharged through the powder discharge port 105;

[0056] Step S5: Exhaust: The processed gas is discharged from the magnetic separator housing 100 through the gas outlet 103 .

[0057] In this embodiment, a plurality of turntable shells 220 are connected together at intervals perpendicular to the gas flow direction, dividing the airflow into a plurality of tributaries, thereby reducing the cross-sectional area of ​​each airflow. When each airflow passes through the gap between the upper and lower turntable shells 220, the magnetic micropowder particles in the airflow are adsorbed on the rear end of the upper turntable shell 220, the front end of the lower turntable shell 220 and the outer circular surface of the turntable shell 220, thereby increasing the adsorption area of ​​the magnetic separator and improving the magnetic separation efficiency of the device.

[0058] At the same time, the turntable housing 220 is rotated toward the outside of the magnetic separator housing 100, and the magnetic powder particles adsorbed on the turntable housing 220 are driven to rotate. When the magnetic powder particles are driven to rotate to the side away from the magnetic disk 210, the magnetic powder particles lose their magnetic force and fall into the discharge chute 104, thereby realizing the automatic separation of the magnetic powder particles and improving the separation efficiency of the device. Second embodiment:

[0059] Based on the first embodiment, the second embodiment further optimizes and refines the structure of the inner cavity 101 of the first embodiment.

[0060] like Figure 1 As shown, further, there are a plurality of discharge troughs 104, which are arranged at intervals along the gas flow direction on the outside of the magnetic separator housing 100, and there are a plurality of magnetic wheel assemblies 200, which are arranged in a one-to-one correspondence in the discharge trough 104. The provision of a plurality of magnetic wheel assemblies 200 increases the number of sorting stages of the device, realizes the multi-stage sorting function of the device, thereby improving the processing capacity, and each magnetic wheel assembly 200 sequentially sorts the magnetic particles, and the sorting efficiency of the device is improved by the multi-stage magnetic wheel assemblies 200 working in series.

[0061] like Figure 1 As shown, further, an air flow diversion device 400 is also provided in the magnetic separator housing 100, and the air flow diversion device 400 is vertically arranged along the gas flow direction, and a plurality of discharge troughs 104 are symmetrically arranged on both sides of the magnetic separator housing 100, and a plurality of magnetic wheel assemblies 200 are arranged one by one in the discharge trough 104, and the top and bottom ends of the air flow diversion device 400 are both conical, and there is a gap between the outer wall surface of the air flow diversion device 400 and the inner wall surface of the magnetic separator housing 100, and the inner cavity 101 is separated to form two diversion channels, and the part of the turntable housing 220 extending into the inner cavity 101 is tangent to the outer wall surface of the air flow diversion device 400. The airflow diversion device 400 effectively divides the inner cavity 101 into two diversion channels, diverting the columnar airflow entering the inner cavity 101 into two flat airflows, so that the magnetic particles in the airflow can fully contact the magnetic wheel assembly 200 and be separated, thereby improving the sorting effect of the magnetic particles, reducing collisions or overlaps between particles, and improving the sorting accuracy.

[0062] like Figure 1 As shown, further, a cleaning device 500 is provided on the inner wall of the discharge chute 104 away from the magnetic separator housing 100, the top of the cleaning device 500 extends to the shaft cylinder 240, and the cleaning device 500 contacts the outer surface of the turntable housing 220 and the shaft cylinder 240. When the magnetic micro-powder particles are driven to rotate to the side away from the magnetic disk 210, the cleaning device 500 sweeps the magnetic micro-powder particles into the discharge chute 104. After the magnetic micro-powder particles are adsorbed by the magnetic disk 210 through the turntable housing 220, as the shaft cylinder 240 rotates, the magnetic micro-powder particles will gradually move away from the magnetic disk 210, lose magnetism and fall. The design of the cleaning device 500 is to timely clean the magnetic micro-powder particles adsorbed by the surface of the turntable housing 220. When the particles are driven to rotate and move away from the disk 210, the cleaning device 500 extends to the shaft cylinder 240 through its designed top to help sweep off these particles and prevent particle accumulation, ensuring that the magnetic micropowder can be effectively cleaned after each sorting and that they will not remain in the equipment.

[0063] This embodiment also discloses a magnetic separation method.

[0064] A magnetic separation method, using the aforementioned micro powder magnetic separator, comprises the following steps:

[0065] Step S1: air intake: gas enters the inner cavity 101 from the air inlet 102 through the air duct;

[0066] Step S2: primary diversion: the gas passes through the gas diversion device 400, the gas is diverted at the air inlet, and the gas carries the micropowder and flows in the diversion channel;

[0067] Step S3: secondary flow division: the gas passes through the portion of the magnetic wheel assembly 200 extending into the inner cavity 101, and passes through a plurality of gap channels formed between a plurality of turntable shells 220, and the gas is divided into a plurality of branch flows;

[0068] Step S4: separation: when the gas passes through the gap channel, the magnetic powder in the gas is adsorbed on the surface of the turntable housing 220 by the magnetic disk 210, and the gas continues to flow to the subsequent magnetic wheel assembly 200 for processing;

[0069] Step S5: powder discharge: start the driving device 300 to drive the rotating shaft 240 to rotate toward the outside of the magnetic separator housing 100, so that the magnetic powder adsorbed on the surface of the turntable housing 220 is away from the magnetic disk 210, and the magnetic powder loses its magnetic force and falls into the discharge trough 104 and is discharged through the powder discharge port 105;

[0070] Step S6: Cleaning: The magnetic powder remaining on the surface of the turntable housing 220 rotates to the cleaning device 500 , and the remaining magnetic powder is swept into the discharge chute 104 and discharged through the powder discharge port 105 .

[0071] Step S7: Exhaust: The processed gas is discharged from the magnetic separator housing 100 through the gas outlet 103 .

[0072] In this embodiment, the columnar airflow entering the inner cavity 101 is split into two flat airflows through a single diversion, so that the magnetic particles in the airflow fully contact the magnetic wheel assembly 200 and are separated, thereby improving the sorting effect of the magnetic particles, reducing collisions or overlaps between particles, and improving the sorting accuracy.

[0073] At the same time, through the cleaning step, the cleaning device 500 sweeps away the magnetic particles remaining on the surface of the turntable housing 220 to prevent the accumulation of particles, ensuring that the magnetic micropowder can be effectively cleaned after each sorting and ensuring that they will not remain in the equipment.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multi-wheel disc type powder magnetic separator, characterized in that: include: A magnetic separator housing (100) has an inner cavity (101), an air inlet (102) is provided at the bottom end of the magnetic separator housing (100), gas flows inside the inner cavity (101), and an air outlet (103) is provided at the top end of the magnetic separator housing (100); A discharge chute (104), wherein the first end of the side surface of the discharge chute (104) is connected to the outside of the magnetic separator housing (100); a magnetic wheel assembly (200), wherein the magnetic wheel assembly (200) comprises a plurality of magnetic disks (210) and a plurality of turntable housings (220); the turntable housing (220) is a hollow disk body arranged vertically, wherein a plurality of the turntable housings (220) are connected together at intervals perpendicular to the gas flow direction, and all the turntable housings are connected to the discharge chute (104) rotatably around their axial direction, and a portion of the turntable housing (220) near the magnetic separator housing (100) extends into the inner cavity (101); a plurality of the magnetic disks (210) are sleeved one by one in the portion of the turntable housing (220) extending into the inner cavity (101), and all the magnetic disks (210) are connected and kept fixed relative to the turntable housing (220).

2. The multi-wheel disc type powder magnetic separator according to claim 1, characterized in that: There are a plurality of discharge troughs (104), which are arranged at intervals along the gas flow direction on the outside of the magnetic separator housing (100) in a longitudinal direction, and there are a plurality of magnetic wheel assemblies (200), which are arranged in a one-to-one correspondence in the discharge troughs (104).

3. The multi-wheel disc type powder magnetic separator according to claim 2, characterized in that: An airflow diversion device (400) is also provided in the magnetic separator housing (100), and the airflow diversion device (400) is arranged along the gas flow direction. A plurality of discharge troughs (104) are symmetrically arranged on both sides of the magnetic separator housing (100), and a plurality of magnetic wheel assemblies (200) are arranged in the discharge troughs (104) in a one-to-one correspondence. The top and bottom ends of the airflow diversion device (400) are both conical, and there is a gap between the outer wall surface of the airflow diversion device (400) and the inner wall surface of the magnetic separator housing (100), which separates the inner cavity (101) to form two diversion channels, and the portion of the turntable housing (220) extending into the inner cavity (101) is tangent to the outer wall surface of the airflow diversion device (400).

4. The multi-wheel disc type powder magnetic separator according to claim 3, characterized in that: The magnetic wheel assembly (200) further comprises a fixed shaft (230), wherein the fixed shaft (230) is fixedly arranged in the discharge chute (104) in a direction perpendicular to the gas flow direction, and one side of a plurality of magnetic disks (210) are fixedly arranged on the fixed shaft (230) at intervals along the axial direction of the fixed shaft (230); The magnetic wheel assembly (200) further comprises a rotating shaft cylinder (240), wherein the rotating shaft cylinder (240) is sleeved on the outer side of the fixed shaft (230), and a plurality of rotating disk shells (220) are arranged at the front end and the rear end of the rotating shaft cylinder (240), wherein the rotating disk shell (220) is concentric with the rotating shaft cylinder (240), and the interior of the rotating disk shell (220) is connected to the interior of the rotating shaft cylinder (240).

5. The multi-wheel disc type powder magnetic separator according to claim 4, characterized in that: The magnetic disk (210) comprises a first disk and a second disk, the first disk and the second disk having the same circumscribed circle, the circumscribed circle being concentric with the fixed shaft (230) and having a clearance fit with the inner wall of the turntable housing (220), the shape of the first disk corresponding to the portion of the circumscribed circle located in the inner cavity (101), and the shape of the second disk corresponding to the portion of the circumscribed circle located in the discharge chute (104).

6. The multi-wheel disc type powder magnetic separator according to claim 4, characterized in that: The rear ends of the fixed shaft (230) and the rotating shaft cylinder (240) extend out of the rear end of the magnetic separator housing (100). The multi-wheel disc-type micro-powder magnetic separator also includes a driving device (300). The driving device (300) is arranged at the rear end of the magnetic separator housing (100). The output end of the driving device (300) is connected to the outer side of the rear end of the rotating shaft cylinder (240) and drives the rotating shaft cylinder (240) to rotate.

7. The multi-wheel disc type powder magnetic separator according to claim 6, characterized in that: The bottom end of the discharge trough (104) is provided with a powder discharge port (105).

8. The multi-wheel disc type powder magnetic separator according to claim 7, characterized in that: A cleaning device (500) is provided on the inner wall of the discharge chute (104) on a side away from the magnetic separator housing (100), the top end of the cleaning device (500) extends to the rotating shaft cylinder (240), and the cleaning device (500) contacts the outer surfaces of the turntable housing (220) and the rotating shaft cylinder (240), and when the magnetic micro-powder particles are driven to rotate to a side away from the magnetic disk (210), the cleaning device (500) sweeps the magnetic micro-powder particles into the discharge chute (104).

9. A magnetic separation method, using the micro powder magnetic separator as claimed in claim 8, characterized in that: The following steps are involved: Air intake: The gas enters the inner cavity (101) from the air intake (102) through the air duct; Flow division: when the gas passes through the portion of the magnetic wheel assembly (200) extending into the inner cavity (101), it is divided into a plurality of branch flows by a plurality of gap channels formed between a plurality of turntable shells (220); Separation: When the gas passes through the gap channel, the magnetic powder in the gas is adsorbed by the magnetic disk (210) onto the surface of the turntable housing (220), and the gas continues to flow to the subsequent magnetic wheel assembly (200) for processing; Powder discharge: starting the driving device (300) to drive the rotating shaft cylinder (240) to rotate toward the outside of the magnetic separator housing (100), so that the magnetic powder adsorbed on the surface of the turntable housing (220) moves away from the magnetic disk (210), and the magnetic powder loses its magnetic force and falls into the discharge trough (104) and is discharged through the powder discharge port (105); Exhaust: The processed gas is discharged from the magnetic separator housing (100) through the gas outlet (103).

10. The magnetic separation method according to claim 9, characterized in that: The air intake step also includes the following steps: Primary diversion: the gas passes through the gas diversion device (400), the gas is diverted at the air inlet, and the gas carries the micro powder and flows in the diversion channel; The step of discharging powder also includes the following steps: Cleaning: The magnetic micro powder remaining on the surface of the rotating disk housing (220) rotates to the cleaning device (500), and the remaining magnetic micro powder is swept into the discharge chute (104) and discharged through the powder discharge port (105).

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