Magnetic impurity removing device for powder

Abstract

The utility model discloses a kind of powder magnetic attraction impurity removal devices, it is related to the magnetic separation field of separating solid materials from solid materials or fluid, solve the problem that iron filings are not easy to be scraped clean when magnetic bar is scraped by magnetic bar scraping ring and removes the iron filings that it adsorbs.The technical scheme used by the utility model is: powder magnetic attraction impurity removal device, including box, the top of box is equipped with feed inlet, the bottom of box is equipped with discharge outlet and slag outlet, box side plate is equipped with through-hole, through-hole is fixed with iron scraper in one side in box, iron scraper is circular table or cone table, iron scraper is equipped with magnetic bar through-hole, through-hole and magnetic bar through-hole are equipped with magnetic bar, magnetic bar includes outer tube of non-ferromagnetic material and ferromagnetic material fixed in outer tube inside, the inner end of magnetic bar is fixed with top hat, the inner tube inside of the outer tube of magnetic bar inner end is not set ferromagnetic material;Box is also equipped with driving device or driving structure that drives magnetic bar reciprocating motion along its axial direction.The utility model is used for removing iron filings impurities in powder.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separation for separating solid materials from solid materials or fluids, specifically a magnetic adsorption device for removing impurities from powder. Background Technology

[0002] Iron filings may be mixed into the powder during transportation, storage or grinding. Therefore, iron filings should generally be removed by an iron removal device before use.

[0003] For example, patent CN 222306048 U discloses a lithium battery material iron removal machine. The lithium battery material iron removal machine includes a device body, several magnetic rods, and a drive mechanism. The device body has a working chamber, which is divided into an adsorption zone and an iron removal zone by vertically arranged partition plates. The top of the device body has a feed inlet, and the bottom has a discharge outlet and an iron discharge port. The adsorption zone is connected to the feed inlet and discharge outlet, and the iron removal zone is connected to the iron discharge port. Several first through holes are provided on the partition plates, and several second through holes are provided on the two sides of the device body parallel to the partition plates. The second through holes correspond one-to-one with the first through holes. Magnetic rod scrapers are installed inside the second through holes, and the magnetic rods penetrate through both the first and second through holes. The lithium battery material is fed into the adsorption zone of the working chamber through the feed port. The magnetic rods adsorb the iron-containing impurities on the surface of the lithium battery material. After being adsorbed by the magnetic rod group, the lithium battery material leaves the iron removal machine through the discharge port. The drive mechanism drives the magnetic rods to reciprocate along the axis of the magnetic rods in the working chamber. The iron-containing impurities on the surface of the magnetic rods are scraped off by the magnetic rod scraper ring installed at the second through hole and fall into the iron discharge port to leave the iron removal machine, thus completing the iron removal work of the lithium battery material.

[0004] The working chamber of the aforementioned lithium battery material iron removal machine is under normal pressure, making it easy for fine materials to escape from the iron discharge port. This is especially problematic when removing iron filings from powder materials, where large amounts of powder can escape, causing environmental pollution. The magnetic rod reciprocates along its axial direction. Iron-containing impurities adsorbed on the outer surface of the magnetic rod are scraped off by the magnetic rod scraper and fall into the iron discharge port. However, because the entire magnetic rod is magnetic, its wear resistance is insufficient, resulting in significant wear between the magnetic rod and the partition plate, and between the magnetic rod and the device body. This causes abnormal noise when the magnetic rod reciprocates along its axial direction. When the magnetic rod passes through the second through hole and is pulled outwards, the partition plate easily scrapes iron filings off at the second through hole and onto the discharge port. Since the entire magnetic rod is magnetic, all parts of it have magnetic attraction. The magnetic rod scraper cannot remove all iron-containing impurities. When the magnetic rod is pulled out, fine iron filings easily accumulate at the end of the magnetic rod and fall into the discharge port under the impact of the material.

[0005] For example, patent CN 220294917 U discloses a fully enclosed vibratory automatic iron separator. This fully enclosed vibratory automatic iron separator includes a housing, with multiple horizontally extending hollow sleeves inside the housing cavity. The two ends of each hollow sleeve are connected to the housing. The hollow sleeves are open at both ends, and a magnetic rod is slidably mounted inside each sleeve. A drive mechanism is provided on the housing to drive the magnetic rod to slide axially. A vibrator assembly is fixedly connected to the outside of the housing, driving the hollow sleeves to vibrate and dislodge weakly magnetic materials adsorbed on them. While this fully enclosed vibratory automatic iron separator places the magnetic rod inside the hollow sleeve to prevent the powder inside the housing from directly contacting the magnetic rod, when the magnetic rod slides axially, the magnetic material outside the hollow sleeve can easily fall into the material outlet, causing the adsorbed magnetic material to fall into the material collection area. Utility Model Content

[0006] This invention provides a magnetic adsorption impurity removal device for powder, which solves the problem that when a magnetic rod scrapes off the iron filings it has adsorbed, the iron filings are not easily removed completely.

[0007] The technical solution adopted in this utility model is: a powder magnetic adsorption impurity removal device, including a box body made of non-ferromagnetic material. The top of the box body has a feed inlet, and the bottom has a discharge outlet and a slag outlet. The discharge outlet is vertically aligned with the feed inlet, and the slag outlet and feed inlet are vertically staggered. The side plate of the box body near the slag outlet has at least one through hole. A scraper is provided on the inner side of the side plate at the through hole. The scraper is made of non-ferromagnetic material, and its outer contour is frustum-shaped or truncated cone-shaped. A magnetic rod through hole is provided between the upper and lower surfaces of the geometric body corresponding to the outer contour of the scraper. The outer wheel of the scraper... The bottom surface of the geometric body corresponding to the contour is fixed around the through hole on the inner side of the side plate; a magnetic rod is inserted through the through hole and the magnetic rod through hole, the magnetic rod is arranged in the horizontal direction, and the stroke of the magnetic rod reciprocating along its axis covers the top of the discharge port and the top of the slag discharge port; the magnetic rod includes a non-ferromagnetic outer tube and ferromagnetic material fixed inside the outer tube, the inner end of the magnetic rod is located inside the box and the outer end is located outside the box, the inner end of the magnetic rod is fixed with a top cap, and no ferromagnetic material is placed inside the outer tube at the inner end of the magnetic rod; a driving device or driving structure for driving the magnetic rod to reciprocate along its axis is also provided outside the box.

[0008] To prevent powder from entering the area directly above the slag outlet after entering the box, and to prevent iron filings from entering the area directly above the discharge outlet when the magnetic rod removes iron filings, a further step is taken: a guide plate is provided on the side of the box near the slag outlet of the feed inlet; a guide baffle is provided between the area directly above the discharge outlet and the area directly above the slag outlet inside the box; the guide baffle is arranged horizontally and perpendicular to the magnetic rod; the guide baffle has an angled cross-section with the apex of the angle facing upwards.

[0009] To further improve the stability of the magnetic rod, the side plate opposite the side plate with the through hole in the housing is also equipped with a magnetic rod support structure corresponding to each through hole. When the magnetic rod moves into the housing to its limit position, the inner end of the magnetic rod is supported by the magnetic rod support structure. For example, the magnetic rod support structure is a mounting platform or a blind hole.

[0010] To prevent powder from escaping from the chamber, a dust collection pipe is connected to the chamber. Furthermore, to prevent powder from being carried away by negative pressure, a baffle plate is installed inside the dust collection pipe.

[0011] To improve the strength of the magnetic powder removal device, specifically: the housing and scraper are made of stainless steel, and the outer tube of the magnetic rod is also made of stainless steel.

[0012] To facilitate the installation of the magnetic powder removal device in the powder conveying pipeline, the box body is further equipped with a flange joint at the inlet and a flange joint at the outlet.

[0013] Both the drive device and the drive structure are used to drive the magnetic rod to reciprocate along its axial direction. Specifically: the outer end of the magnetic rod is provided with a handle or grip; or, the housing is also provided with a cylinder to drive the magnetic rod to reciprocate along its axial direction.

[0014] To thoroughly remove iron filings and impurities from the powder, the following further measures are taken: the magnetic rods of the box are arranged in at least one layer vertically, with at least two rods in each layer that are parallel to each other. The magnetic rods in the same layer are located on the same horizontal plane and are arranged at equal intervals. The outer ends of the magnetic rods in the same layer are all connected to the synchronization plate. A cylinder is provided on each of the two opposite sides of the box. The piston rods of the two cylinders are connected to the two ends of the synchronization plate respectively. Two guide rods are also fixedly installed on the outside of the box, and the guide rods pass through the synchronization plate.

[0015] The beneficial effects of this invention are as follows: Powder containing iron filings and impurities enters the housing through the inlet, where the iron filings and impurities are adsorbed onto the outer periphery of the magnetic rod. The powder, after iron removal, is discharged through the outlet. When it is necessary to clean the iron filings and impurities on the outer periphery of the magnetic rod, the powder feeding is stopped, and the magnetic rod is moved out of the housing. The scraper scrapes off the iron filings and impurities, which fall into the outlet and are discharged from the housing. Because the outer contour of the scraper is frustum-shaped or truncated cone-shaped, and there is no magnet inside the outer tube at the inner end of the magnetic rod, the iron filings and impurities on the outer periphery of the magnetic rod are easily and thoroughly scraped off, and the iron filings and impurities do not accumulate at the inner end of the magnetic rod. In addition, when the magnetic rod moves out of the housing to its limit position, the top cap acts as a limit, preventing the magnetic rod from coming out of the housing. At the same time, the top cap collides with the scraper and vibrates slightly, which helps to shake off all the iron filings and impurities on the outer periphery of the magnetic rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the magnetic powder removal device of this utility model.

[0017] Figure 2yes Figure 1 The illustrated embodiment is a cross-sectional structural diagram along the vertical plane corresponding to a magnetic rod.

[0018] Figure 3 This is a schematic diagram of the magnetic rod moving into the box to its limit position and moving out of the box to its limit position in this utility model.

[0019] Figure 4 yes Figure 1 The illustrated embodiment shows an electronically controlled schematic diagram of a cylinder.

[0020] Attached reference numerals: 1. Box body, 1-1. Inlet, 1-2. Outlet, 1-3. Slag outlet, 1-4. Magnetic rod support structure, 2. Scraper, 3. Magnetic rod, 3-1. Top cap, 4. Guide plate, 5. Guide baffle, 6. Dust collection pipe, 7. Cylinder, 8. Synchronization plate, 9. Guide rod; 10. Solenoid valve, 11. PLC controller. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] This invention removes iron filings and impurities from powder using magnetic attraction. For example... Figure 1 and Figure 2 As shown, the magnetic powder removal device includes a housing 1. The top of the housing 1 has an inlet 1-1, and the bottom has an outlet 1-2 and a slag outlet 1-3. The outlet 1-2 is vertically aligned with the inlet 1-1, while the slag outlet 1-3 and inlet 1-1 are vertically staggered. The housing 1 is made of a non-ferromagnetic material to prevent iron filings from adsorbing onto the inner wall of the housing 1. To ensure the strength of the housing 1, it is generally made of an alloy material, such as stainless steel. The inlet 1-1 at the top of the housing 1 is the entrance for powder containing iron filings to enter the housing 1 for removal. The inlet 1-1 is circular or polygonal, such as rectangular. Since the powder is generally transported via pipeline, a flange joint is provided at the inlet 1-1 for easy connection. The outlet 1-2 at the bottom of the housing 1 is the outlet for the removed powder, vertically aligned with the inlet 1-1. To facilitate connection of the discharge port 1-2 to the discharge pipe, the discharge port 1-2 is equipped with a flange joint. The slag discharge port 1-3 at the bottom of the box 1 is the discharge outlet for iron filings and impurities. The area below the slag discharge port 1-3 can be used to collect the slag or to connect a pipe to the next step, for example, by installing a flange joint at the slag discharge port 1-3.

[0023] The side plate of the box body 1 near the slag outlet 1-3 is provided with at least one through hole for sliding installation of magnetic rods 3, with each magnetic rod 3 corresponding to a through hole. The box body 1 can be any three-dimensional shape. In order to facilitate the arrangement of magnetic rods 3 and ensure that the powder containing iron filings and impurities is in full contact with the magnetic rods 3, the box body 1 is rectangular in horizontal cross section, and the through holes are arranged in rows on the side plate.

[0024] The inner side of the side plate is equipped with a scraper 2 at the through hole, which is used to scrape off iron filings and impurities adsorbed on the outer periphery of the magnetic rod 1. The scraped iron filings and impurities fall into the slag outlet 1 at the bottom of the box 1. 3。 The scraper 2 is made of a non-ferromagnetic material. To ensure its strength, the scraper 2 is generally made of an alloy material, such as stainless steel. See also Figure 2 and Figure 3 The outer contour of the scraper 2 is shaped like a frustum of a cone or a truncated cone. The two bases of the frustum of a cone are the upper and lower bases, respectively. A magnetic rod through-hole is provided between the upper and lower bases of the geometric body corresponding to the outer contour of the scraper 2. The magnetic rod through-hole allows a magnetic rod 3 to pass through. The through-hole is arranged along the axis of the geometric body corresponding to the outer contour of the scraper 2, and its shape is consistent with the shape of the magnetic rod 3. The lower base of the geometric body corresponding to the outer contour of the scraper 2 is fixed around the through-hole on the inner side of the side plate, for example, by adhesive bonding.

[0025] The magnetic rod through-holes of the scraper 2 correspond to the through-holes of the side plate. Magnetic rods 3 are inserted into the through-holes and magnetic rod through-holes, arranged horizontally and parallel to each other. Magnetic rods 3 can slide axially within the through-holes and magnetic rod through-holes, and their axial reciprocating motion covers directly above the discharge port 1-2 and the slag discharge port 1-3. The housing 1 is rectangular in horizontal cross-section, and the magnetic rods 3 are arranged along the length or width of the rectangle. The axial reciprocating motion of the magnetic rods 3 covers directly above the discharge port 1-2, ensuring that all powder passes through the gaps between the magnetic rods 3. The axial reciprocating motion of the magnetic rods 3 covers directly above the slag discharge port 1-3, where the magnetic rods 3 remove adsorbed iron filings and impurities, which fall into the slag discharge port 1-3.

[0026] The internal area of ​​the housing 1 is actually divided into an adsorption zone and an iron removal zone. The area directly above the discharge port 1-2 is the adsorption zone, where magnetic rods 3 adsorb iron filings and impurities from the powder. The area directly above the slag discharge port 1-3 is the iron removal zone, where scraper 2 scrapes away iron filings and impurities from the outer periphery of magnetic rods 3. To prevent the powder from entering the area directly above the slag discharge port 1-3 after entering the housing 1, that is, to prevent the powder from being discharged from the slag discharge port 1-3, a guide plate 4 is provided on the side of the feed inlet 1-1 of the housing 1 near the slag discharge port 1-3. Figure 2 As shown. The guide plate 4 is preferably made of a non-ferromagnetic material, generally an alloy material, such as stainless steel. The guide plate 4 is arranged at an angle to control the powder falling into the area directly above the discharge port 1-2.

[0027] Powder inevitably splashes when it falls onto magnetic rod 3. To better separate the adsorption zone and the iron removal zone, and to prevent powder from entering the area directly above slag outlet 1-3, and also to prevent iron filings from entering the area directly above discharge outlet 1-2 when magnetic rod 3 removes iron filings and impurities, a guide baffle 5 is provided between the area directly above discharge outlet 1-2 and the area directly above slag outlet 1-3 inside the housing 1. Figure 2 As shown, there are multiple guide plates 5 arranged between the magnetic rods 3 in each layer. The guide plates 5 are arranged horizontally and perpendicular to the magnetic rods 3. The cross-section of the guide plate 5 is angular and the vertex of the angle is upward, that is, the vertex of the angle is the highest point of the guide plate 5.

[0028] Magnetic rod 3 is used to adsorb iron filings and impurities in the powder. To ensure sufficient adsorption of these impurities, magnetic rod 3 is arranged in at least one vertical layer, with at least two parallel rods per layer. Magnetic rods 3 in the same layer are positioned on the same horizontal plane and spaced evenly. Magnetic rod 3 comprises a non-ferromagnetic outer tube and ferromagnetic material fixed inside the outer tube. To ensure the strength and wear resistance of the outer tube, it is generally made of an alloy material, such as stainless steel. The outer tube can be a round tube or other polygonal tubes, such as a rectangular tube. The magnetic rod 3 has an inner end and an outer end, with the inner end located inside the housing 1 and the outer end outside. When the magnetic rod 3 slides axially into the housing 1 to its limit position, the inner end of the magnetic rod 3 abuts against the inner wall of the housing. When the magnetic rod 3 slides axially outward into the housing 1 to its limit position, the inner end of the magnetic rod 3 abuts against the scraper 2.

[0029] To improve the stability of the magnetic rod 3 and prevent its inner end from tilting downwards after being impacted by powder, the side plate opposite the side plate with the through hole in the housing 1 is also equipped with magnetic rod support structures 1-4 corresponding to the through hole. When the magnetic rod 3 moves into the housing 1 to its limit position, its inner end is supported by the magnetic rod support structure 1-4. The magnetic rod support structure 1-4 supports the inner end of the magnetic rod 3 without affecting its axial movement. For example, the magnetic rod support structure 1-4 can be a mounting platform or a blind hole.

[0030] To prevent the magnetic rod 3 from detaching from the housing 1, a top cap 3-1 is fixed to the inner end of the magnetic rod 3. The size of the top cap 3-1 is larger than the size of the magnetic rod 3, which is equivalent to setting an enlarged end at the inner end of the magnetic rod 3. When the magnetic rod 3 slides outward from the housing 1 along its axis to its limit position, the top cap 3-1 collides with the scraper 2 and vibrates slightly, causing all the iron filings and impurities on the outer periphery of the magnetic rod 3 to fall off. The outer tube at the inner end of the magnetic rod 3 does not contain ferromagnetic material. When the magnetic rod 3 slides outward from the housing 1 along its axis to near its limit position, the iron filings and impurities on the outer periphery of the magnetic rod 3 are pushed away by the scraper 2 and fall off automatically. The residual amount of iron filings and impurities is very small. In addition, the collision and slight vibration between the top cap 3-1 and the scraper 2 completely remove all the iron filings and impurities on the outer periphery of the magnetic rod 3.

[0031] The housing 1 is also equipped with a drive device or drive structure for reciprocating the magnetic rod 3 along its axial direction. The reciprocating motion of the magnetic rod 3 along its axial direction can be achieved by direct manual operation of the outer end of the magnetic rod 3; for example, the drive structure could be a handle or grip located at the outer end of the magnetic rod 3. Alternatively, the reciprocating motion of the magnetic rod 3 along its axial direction can be achieved by mechanical operation of the outer end of the magnetic rod 3; for example, the housing 1 is also equipped with a cylinder 7 for driving the magnetic rod 3 to reciprocate along its axial direction. Figure 1 As shown.

[0032] The magnetic rods 3 in the housing 1 are generally arranged in two or more layers vertically, with at least two rods in each layer that are parallel to each other. The magnetic rods 3 in the same layer are located on the same horizontal plane and are arranged at equal intervals. To facilitate the reciprocating motion of the magnetic rods 3 along their axial direction, the outer ends of the magnetic rods 3 in the same layer are connected to a synchronization plate 8. A cylinder 7 is provided on each of the opposite sides of the housing 1. The piston rods of the two cylinders 7 are connected to both ends of the synchronization plate 8, meaning that the two cylinders 7 synchronously drive the magnetic rods 3 in the same layer to reciprocate along their axial direction from both ends of the synchronization plate 8. Figure 1 As shown. To improve the stability of the synchronization plate 8, two guide rods 9 are also fixedly installed on the outside of the housing 1. The guide rods 9 pass through the synchronization plate 8, as shown. Figure 1 As shown. The guide rod 9 serves to fix the travel trajectory of the synchronous plate 8, allowing it to reciprocate smoothly in a straight line. The cylinder 7 can be started at a set time or when the quality of the powder after impurity removal reaches a certain level. The cylinder 7 can also be equipped with a PLC controller or a time-saving device. The PLC controller and time-saving device control the start and stop of the solenoid valve, which in turn controls the compressed air, which drives the piston rod of the cylinder 7. For example, the solenoid valve 10 controlling the cylinder 7 has two control modes: manual control and automatic control. See the electrical control section for details. Figure 4 In manual control, switch SA is in the manual position and connected to D1. Pressing start button SB2 connects D3 and D4, contactor KM2 is electrically engaged and self-locked by the closed auxiliary normally open contact. Solenoid valve 10 controls cylinder 7. To stop, press stop button SB1. In automatic control, switch SA is in the automatic position and connected to D2. PLC controller 11 controls cylinder 7 through solenoid valve 10, enabling automatic and cyclic iron removal according to the set time. For example, PLC controller 11 is a KG316T microcomputer time control switch.

[0033] To prevent powder from escaping from the housing 1, a dust collection pipe 6 is connected to the housing 1, which is used to connect to a negative pressure dust removal system. For example, the dust collection pipe 6 is connected to the side plate of the housing 1, and the dust collection pipe 6 is arranged at an angle or vertically. To adjust the air pressure inside the housing 1, the dust collection pipe 6 is also equipped with a regulating valve to dynamically control the air pressure. To prevent powder from being carried away by the negative pressure, baffles are also installed inside the dust collection pipe 6. The baffles reduce the flow rate and reduce the amount of powder being sucked into the negative pressure dust removal system. For example, the baffles are arranged at intervals along the dust collection pipe 6, and the projection of one of any two adjacent baffles on the horizontal plane is opposite to the projection of the other on the horizontal plane. The baffles form a continuous S-shaped path inside the dust collection pipe 6. When the pressure inside the dust collection pipe 6 returns to normal, the powder can automatically fall into the housing 1, or the powder can be automatically made to fall into the housing 1 by tapping the dust collection pipe 6.

Claims

1. A powder magnetic adsorption impurity removal device, comprising a housing (1), the housing (1) being made of non-ferromagnetic material, a feed inlet (1-1) at the top of the housing (1), a discharge outlet (1-2) and a slag outlet (1-3) at the bottom of the housing (1), the discharge outlet (1-2) being vertically aligned with the feed inlet (1-1), and the slag outlet (1-3) and the feed inlet (1-1) being vertically staggered, and at least one through hole being provided on the side plate of the housing (1) near the slag outlet (1-3), characterized in that: A scraper (2) is provided at the through hole on the inner side of the side plate. The scraper (2) is made of non-ferromagnetic material. The outer contour of the scraper (2) is frustum-shaped or truncated cone-shaped. A magnetic rod through hole is provided between the upper and lower bottom surfaces of the geometric body corresponding to the outer contour of the scraper (2). The lower bottom surface of the geometric body corresponding to the outer contour of the scraper (2) is fixed around the through hole on the inner side of the side plate. A magnetic rod (3) is inserted into the through hole and the magnetic rod through hole. The magnetic rod (3) is arranged in the horizontal direction and moves back and forth along its axis. The process covers the area directly above the discharge port (1-2) and the slag discharge port (1-3); the magnetic rod (3) includes a non-ferromagnetic outer tube and a ferromagnetic material fixed inside the outer tube. The inner end of the magnetic rod (3) is located inside the box (1) and the outer end is located outside the box (1). The inner end of the magnetic rod (3) is fixed with a top cap (3-1), and no ferromagnetic material is provided inside the outer tube at the inner end of the magnetic rod (3); the box (1) is also provided with a driving device or driving structure for driving the magnetic rod (3) to reciprocate along its axial direction.

2. The powder magnetic adsorption impurity removal device as described in claim 1, characterized in that: A guide plate (4) is provided on the side of the feed inlet (1-1) of the box (1) near the slag outlet (1-3). A guide baffle (5) is provided between the area directly above the discharge outlet (1-2) and the area directly above the slag outlet (1-3) in the box (1). The guide baffle (5) is arranged in the horizontal direction and is perpendicular to the magnetic rod (3). The guide baffle (5) has an angle in its cross-section and the vertex of the angle faces upward.

3. The powder magnetic adsorption impurity removal device as described in claim 1, characterized in that: The side plate opposite to the box body (1) with the through hole is also provided with a magnetic rod support structure (1-4) corresponding to the through hole. When the magnetic rod (3) moves into the box body (1) to the limit position, the inner end of the magnetic rod (3) is supported by the magnetic rod support structure (1-4).

4. The powder magnetic adsorption impurity removal device as described in claim 3, characterized in that: The magnetic rod support structure (1-4) is a hanging platform or a blind hole.

5. The powder magnetic adsorption impurity removal device as described in claim 1, characterized in that: The housing (1) is also connected to a dust collection pipe (6).

6. The powder magnetic adsorption impurity removal device as described in claim 5, characterized in that: The dust collection pipe (6) is also equipped with a baffle plate.

7. The powder magnetic adsorption impurity removal device according to any one of claims 1 to 6, characterized in that: The box body (1) and the scraper (2) are made of stainless steel, and the outer tube of the magnetic rod (3) is also made of stainless steel.

8. The powder magnetic adsorption impurity removal device according to any one of claims 1 to 6, characterized in that: The feed inlet (1-1) of the box body (1) is equipped with a flange joint, and the discharge outlet (1-2) of the box body (1) is equipped with a flange joint.

9. The powder magnetic adsorption impurity removal device according to any one of claims 1 to 6, characterized in that: The outer end of the magnetic rod (3) is provided with a handle or grip; or, the outer side of the housing (1) is provided with a cylinder (7) that drives the magnetic rod (3) to reciprocate along its axis.

10. The powder magnetic adsorption impurity removal device according to any one of claims 1 to 6, characterized in that: The magnetic rods (3) of the box (1) are arranged in at least one layer in the vertical direction, with at least two rods in each layer and parallel to each other. The magnetic rods (3) in the same layer are located on the same horizontal plane and are arranged at equal intervals. The outer ends of the magnetic rods (3) in the same layer are connected to the synchronization plate (8). A cylinder (7) is provided on each of the opposite sides of the box (1). The piston rods of the two cylinders (7) are connected to the two ends of the synchronization plate (8). Two guide rods (9) are also fixedly installed on the outside of the box (1). The guide rods (9) pass through the synchronization plate (8).

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