Magnetic separation device for impurity removal of spherical graphite

Abstract

The magnetic separation device comprises a magnetic separation box, a conveying belt is arranged in the magnetic separation box, the magnetic separation device further comprises a magnetic separation frame, the magnetic separation frame is installed on the magnetic separation box, grid plates and magnetic rollers which are sequentially distributed at intervals are arranged in the magnetic separation frame, and each grid plate comprises a grid net on the upper layer and a dispersion column on the lower layer. The same ends of the magnetic rollers are rotationally installed on the magnetic separation frame through bearings, the other same ends of the magnetic rollers are connected with cylindrical worm wheels, and worms meshed with all the worm wheels are installed in the side frame of the magnetic separation frame. The utility model provides a magnetic separation device for impurity removal of spherical graphite, which can enable graphite powder to be distributed more uniformly on a conveying belt, to be thinner and to be contacted with a magnetic roller for a longer time, so that scrap iron impurities mixed in the graphite powder can be more effectively cleaned out; and meanwhile, scrap iron impurities adsorbed on the magnetic roller can be cleaned and collected more conveniently and efficiently, and the efficiency of the whole magnetic separation work is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of graphite production equipment, in particular to a magnetic separation device for removing impurities from spherical graphite. Background Art

[0002] During the production process of spherical graphite, the coarse crushing and trimming of graphite are carried out in equipment made of steel, so a small amount of magnetic impurities such as iron filings will be generated. Although the amount of impurities is small, it will also affect the subsequent processes and the quality of the final product. Therefore, it is necessary to separate the iron filings. At present, the commonly used method for separating iron filings impurities is magnetic separation. By using the property that iron filings are easily attracted by magnets, the graphite micropowder containing spherical graphite after coarse crushing and trimming is passed through the magnetic device of a magnetic separator. Through the attraction of the magnetic device, the iron filings impurities are separated from the graphite micropowder.

[0003] Belt-type magnetic separators are widely used because of their simple structure and low cost, but they still have disadvantages. On the one hand, the graphite micropowder cannot be evenly distributed on the belt, especially the thickness is uneven at different positions, which affects the attraction of the magnetic device to the iron filings in the graphite micropowder. On the other hand, after the inner magnetic drum of the existing belt-type magnetic separator adsorbs impurities, it is extremely inconvenient to collect the impurities by disassembling each magnetic drum, which affects the magnetic separation efficiency. Therefore, the magnetic separation effect of the existing belt-type magnetic separator is not ideal. It can not only effectively remove the iron filings impurities mixed in the graphite micropowder, but also has a low working efficiency. Summary of the Utility Model

[0004] Based on the above problems, the purpose of the utility model is to provide a magnetic separation device for removing impurities from spherical graphite, which can make the graphite powder more evenly distributed on the conveyor belt, with a smaller thickness and a longer contact time with the magnetic drum, so as to more effectively clean out the iron filings impurities mixed in the graphite powder. At the same time, it can also more conveniently and efficiently clean and collect the iron filings impurities adsorbed on the magnetic drum, greatly improving the efficiency of the entire magnetic separation work.

[0005] In view of the above problems, the following technical solutions are provided: A magnetic separation device for purifying spherical graphite includes a magnetic separation box with a feed inlet and a discharge outlet provided at both ends respectively. A conveyor belt for conveying graphite powder is provided in the magnetic separation box. It is characterized in that: It further includes a magnetic separation frame provided on the conveyor belt. The magnetic separation frame is installed on the magnetic separation box in a drawer type and can slide horizontally. A grid plate and a magnetic roller are provided in the magnetic separation frame at intervals in sequence and perpendicular to the conveying direction of the conveyor belt. The grid plate includes an upper grid mesh and lower uniformly arranged dispersion columns vertically downward. The thickness of the grid mesh is 3 - 4 cm. The height of the dispersion columns is about 1 cm and the distance between the bottom and the conveyor belt is 0.5 - 1 cm. The distance between the lowest point of the magnetic roller and the conveyor belt is about 2 cm. One same end of the magnetic rollers is rotatably installed on the inner wall of the magnetic separation frame through bearings, and the other same end is connected with a cylindrical worm gear. A worm is installed in the side frame of the magnetic separation frame and meshes with all the worm gears. One end of the worm is connected with a motor, and the other end is rotatably installed on the frame of the magnetic separation frame through a bearing. Support columns extending into the worm gears and rotatably connected with them through bearings are provided at positions corresponding to the worm gears on the inner wall of the magnetic separation frame.

[0006] The present utility model is further arranged such that the magnetic separation frame is square, and an installation groove for installing and disassembling the magnetic separation frame after horizontal sliding is provided on the inner wall of the magnetic separation box.

[0007] The present utility model is further arranged such that baffles in contact with the surface of the conveyor belt are provided at positions on both sides of the conveyor belt on the inner wall of the magnetic separation frame. The baffles are arranged along the conveying direction of the conveyor belt and the height is about 4 cm.

[0008] The present utility model is further arranged such that the conveyor belt is driven to convey by a conveying motor and rollers.

[0009] The present utility model is further arranged such that three groups of the grid plates and the magnetic rollers are provided at intervals.

[0010] Compared with the prior art, the beneficial effects of the present utility model are:

[0011] 1. A grid plate and a magnetic roller are provided above the conveyor belt for conveying graphite powder. The grid plate includes an upper grid mesh and lower uniformly arranged dispersion columns. The grid mesh can block and disperse a relatively thick pile of graphite powder, reducing the thickness of the graphite powder and preventing accumulation. The lower dispersion columns can disperse the graphite powder, making it evenly distributed on the conveyor belt, increasing the contact area with the magnetic roller, and facilitating more effective separation of iron filings and impurities;

[0012] 2. Multiple magnetic drums are distributed at intervals. One end of each magnetic drum is rotatably installed, and a worm gear is provided at the other end. The rotation and magnetic attraction of all magnetic drums are achieved by a worm that meshes with all the worm gears, which can increase the contact area and contact time between the graphite powder and the magnetic drums, facilitating the effective separation of iron filings and impurities.

[0013] 3. Both the grid plate and the magnetic drums are installed inside the magnetic separation frame. The magnetic separation frame is in a drawer type and is horizontally slidably installed on the magnetic separation box. Corresponding installation grooves are provided on the inner wall of the magnetic separation box. This design enables the magnetic drums to be quickly cleaned and collected after adsorbing iron filings and impurities by pulling out the magnetic separation frame. After cleaning, it can be quickly installed to start the next round of magnetic separation work, greatly improving the efficiency of the magnetic separation work.

[0014] 4. By setting multiple groups of grid plates and magnetic drums to disperse the graphite powder on the conveyor belt in multiple stages, the iron filings and impurities inside the graphite powder can be more easily exposed. At the same time, through multiple contacts with the magnetic drums, the iron filings and impurities can be more easily separated. Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the magnetic separation device for spherical graphite impurity removal in the embodiment of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the magnetic separation frame in the embodiment of the present invention;

[0017] Figure 3 It is a schematic structural diagram of the frame of the magnetic separation frame where the worm is located in the embodiment of the present invention.

[0018] In the figure: 1 - magnetic separation box; 11 - feeding port; 12 - discharging port; 2 - conveyor belt; 21 - conveyor motor; 22 - roller; 3 - magnetic separation frame; 31 - bearing; 32 - support column; 33 - baffle; 4 - grid plate; 41 - grid mesh; 42 - dispersion column; 5 - magnetic drum; 6 - worm gear; 7 - worm; 71 - motor. Detailed Embodiment

[0019] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0020] As Figures 1 - 3As shown in the figure, a magnetic separation device for removing impurities from spherical graphite includes a magnetic separation box 1 with a feed inlet 11 and a discharge outlet 12 provided at both ends respectively. A conveyor belt 2 for transporting graphite powder is provided inside the magnetic separation box 1, and the conveyor belt 2 is driven and conveyed by a conveyor motor 21 and rollers 22. It also includes a magnetic separation frame 3 provided on the conveyor belt 2. A grid plate 4 and a magnetic drum 5 are arranged at intervals in the magnetic separation frame 3 and are perpendicular to the conveying direction of the conveyor belt 2. The grid plate 4 includes an upper grid net 41 and lower uniformly arranged dispersion columns 42 vertically downward. The thickness of the grid net 41 is 3 - 4 cm, the height of the dispersion columns 42 is about 1 cm, and the distance between the bottom and the conveyor belt 2 is 0.5 - 1 cm. The distance between the lowest point of the magnetic drum 5 and the conveyor belt 2 is about 2 cm.

[0021] In the above structure, graphite powder is transported to the conveyor belt 2 through the feed inlet 11 for magnetic separation. A grid plate 4 and a magnetic drum 5 are arranged above the conveyor belt 2 for transporting graphite powder. The grid plate 4 includes an upper grid net 41 and lower uniformly arranged dispersion columns 42. The thickness of the grid net 41 is 3 - 4 cm, which can block and disperse a relatively thick pile of graphite powder, reduce the thickness of the graphite powder, prevent accumulation. The lower dispersion columns 42 are close to the surface of the conveyor belt 2, which can disperse the graphite powder, make the graphite powder form a thickness of 1 - 2 cm, and be evenly distributed on the conveyor belt 2, increasing the contact area between the graphite powder and the magnetic drum 5 during the conveying process, so as to facilitate more effectively separating iron filings and other impurities. The graphite powder after magnetic separation is recovered through the discharge outlet 12.

[0022] As Figures 2 - 3 As shown in the figure, one same end of the magnetic drum 5 is rotatably installed on the inner wall of the magnetic separation frame 3 through bearings 31, and the other same end is connected with a cylindrical worm gear 6. A worm 7 that meshes with all the worm gears 6 is installed inside the side frame of the magnetic separation frame 3. One end of the worm 7 is connected with a motor 71, and the other end is rotatably installed on the frame of the magnetic separation frame 3 through a bearing 31. Support columns 32 that extend into the worm gear 6 and are rotatably connected to it through bearings 31 are provided at positions corresponding to the worm gears 6 on the inner wall of the magnetic separation frame 3. Further, three groups of intervals are provided between the grid plate 4 and the magnetic drum 5.

[0023] In the above structure, multiple magnetic drums 5 are distributed at intervals, and one end of each of them is rotatably installed. A worm gear 6 is provided at the other end of each magnetic drum. The worm gear 6 is rotatably connected to a support column 32 on the magnetic separation frame 3 through a bearing 31. At positions corresponding to all the worm gears 6 on the magnetic separation frame 3, a worm 7 meshing with all the worm gears 6 is provided. One end of the worm 7 is rotatably installed on the magnetic separation frame 3, and the other end is driven to rotate by a motor 71 connected thereto, and drives all the worm gears 6 to rotate, so as to realize the rotational magnetic adsorption of all the magnetic drums 5, which is convenient, efficient and easy to operate. This design can increase the contact area and contact time between the graphite powder and the magnetic drums 5, facilitating the effective separation of iron filings and impurities.

[0024] By arranging multiple groups of grid plates 4 and magnetic drums 5 to perform multi-stage dispersion on the graphite powder on the conveyor belt 2, the iron filings and impurities inside the graphite powder can be more easily exposed. At the same time, through multiple contacts with the magnetic drums 5, the iron filings and impurities can be more easily separated.

[0025] As Figure 2 shown, on the inner wall of the magnetic separation frame 3 at positions on both sides of the conveyor belt 2, there are baffles 33 in contact with the surface of the conveyor belt 2. The baffles 33 are arranged along the conveying direction of the conveyor belt 2 and have a height of about 4 cm. By arranging the baffles 33 on the side of the conveyor belt 2, it can prevent the graphite powder from slipping out from the edge.

[0026] As Figures 1 - 2 shown, the magnetic separation frame 3 is installed on the magnetic separation box 1 in a drawer-like manner and can slide horizontally; the magnetic separation frame 3 is square, and on the inner wall of the magnetic separation box 1, there is an installation groove for installing and disassembling the magnetic separation frame 3 after it slides horizontally. The grid plates 4 and the magnetic drums 5 are both installed in the magnetic separation frame 3. The magnetic separation frame 3 is installed on the magnetic separation box 1 in a drawer-like manner and can slide horizontally, and there is a corresponding installation groove on the inner wall of the magnetic separation box 1. This design can enable the magnetic drums 5 to be quickly cleaned and collected after adsorbing iron filings and impurities by pulling out the magnetic separation frame 3. After cleaning, it can be quickly installed to start the next round of magnetic separation work, greatly improving the efficiency of the magnetic separation work.

[0027] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made above should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic separation device for removing impurities from spherical graphite, comprising a magnetic separation box with an inlet and an outlet at both ends, wherein a conveyor belt for conveying graphite powder is arranged in the magnetic separation box, characterized in that: It also includes a magnetic separation frame arranged on the conveyor belt, which is in a drawer-type manner and can be horizontally slidably installed on the magnetic separation box. The magnetic separation frame is provided with grid plates and magnetic rollers that are distributed in sequence and perpendicular to the conveying direction of the conveyor belt. The grid plate includes an upper grid mesh and a lower vertical downward and evenly arranged dispersion column. The thickness of the grid mesh is 3-4cm, the height of the dispersion column is about 1cm, and the distance between the bottom and the conveyor belt is 0.5-1cm. The distance between the lowest point of the magnetic roller and the conveyor belt is about 2cm. One same end of the magnetic roller is rotatably mounted on the inner wall of the magnetic separation frame through a bearing, and the other same end is connected to a cylindrical worm gear. A worm that meshes with all the worm gears is installed in the side frame of the magnetic separation frame. One end of the worm is connected to a motor, and the other end is rotatably mounted on the frame of the magnetic separation frame through a bearing. A support column that extends into the worm gear and is rotatably connected to the worm gear through a bearing is provided on the inner wall of the magnetic separation frame at a position corresponding to the worm gear.

2. A magnetic separation device for removing impurities from spherical graphite according to claim 1, characterized in that: The magnetic separation frame is square in shape, and an installation groove is provided on the inner wall of the magnetic separation box for installation and removal after the magnetic separation frame slides horizontally.

3. A magnetic separation device for removing impurities from spherical graphite according to claim 1 or 2, characterized in that: Baffles in contact with the surface of the conveyor belt are provided on the inner wall of the magnetic separation frame at positions on both sides of the conveyor belt. The baffles are arranged along the conveying direction of the conveyor belt and have a height of about 4 cm.

4. A magnetic separation device for removing impurities from spherical graphite according to claim 1, characterized in that: The conveyor belt is driven by a conveyor motor and rollers.

5. The magnetic separation device for removing impurities from spherical graphite according to claim 1, characterized in that: The grid plates and magnetic rollers are arranged in three groups at intervals.

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