Screening iron removal machine

Abstract

The utility model provides a screening iron removal machine which comprises an electromagnet with a magnetic separation pipe vertically inserted into the center, a vibration disc fixedly arranged at the upper end of the magnetic separation pipe in a sleeving mode, a plurality of springs fixed between the vibration disc and the electromagnet, a vibrator installed on the top face, and a material pipe and a slag discharging pipe arranged at the lower end of the magnetic separation pipe and communicated through a hinged material guide plate in a switching mode. A cavity is annularly arranged between the magnetic separation tube and the electromagnet, a fan fixed with the inner wall of the electromagnet is arranged in the cavity, the fan can blow air from one end to the other end along the direction of the magnetic separation tube, and a gap is formed between the fan and the magnetic separation tube and is covered by a flexible baffle ring. According to the screening iron removal machine, air can be blown into the annular cavity in the electromagnet through the fan, so that air in a magnetic field at the magnetic separation pipe at the center of the coil flows to dissipate heat, and the effect of cooling the joint of the inner ring surface of the coil and the inner wall of the shell of the electromagnet is achieved; the influence on the magnetism of the electromagnet and the service life of equipment due to accumulated temperature rise of the coil on one side of the magnetic separation tube and the tube is avoided.

Description

Technical Field

[0001] The present application relates to the technology of screening and removing iron from graphite powder, and particularly to a screening and iron-removing machine. Background Art

[0002] The graphite powder used in the production of the negative electrode material of lithium batteries needs to be subjected to magnetic separation to remove iron after grinding, and then proportioned and kneaded. The graphite powder is magnetically separated and de-ironed by a dry powder electromagnetic iron remover. The electromagnet in the iron remover generates a magnetic field by energizing the internal coil, and the resistance in the coil generates heat loss when the current passes through. The electromagnet needs to dissipate heat in time to control the temperature. High temperature will not only reduce the magnetic induction intensity of the electromagnet, but also affect the service life of the electromagnet.

[0003] In the existing iron remover, the coolant in the heat exchange device is circulated into the electromagnet housing, so that the coil is immersed in the coolant for heat exchange and cooling. However, the electromagnet in the existing iron remover generates a magnetic field and heat at the magnetic separation tube in the center of the coil, and the coil is located on the inner ring surface on one side of the magnetic separation tube and fits with the inner wall of the electromagnet housing, resulting in poor heat dissipation effect. During continuous operation, the temperature of the coil on one side of the magnetic separation tube and the temperature inside the tube accumulate and rise, and cannot be cooled. Utility Model Content

[0004] The present application provides a screening and iron-removing machine to solve the problem of poor heat dissipation effect caused by the inability to cool the center of the electromagnet coil in the existing iron remover.

[0005] The present application provides a screening and iron-removing machine, including an electromagnet with a magnetic separation tube vertically inserted in the center. A vibrating disk is sleeved and fixed at the upper end of the magnetic separation tube. A plurality of springs are fixed between the vibrating disk and the electromagnet, and a vibrator is installed on the top surface. A material pipe and a slag discharge pipe are provided at the lower end of the magnetic separation tube, and are switched and communicated through a hinged guide plate. A cavity is annularly arranged between the magnetic separation tube and the electromagnet, and a blower fixed to the inner wall of the electromagnet is installed in the cavity. The blower can blow air from one end to the other along the direction of the magnetic separation tube. There is a gap between the blower and the magnetic separation tube, and it is covered by a flexible retaining ring.

[0006] Optionally, a conical opening in a three-way connection is provided at the upper ends of the material pipe and the slag discharge pipe. The conical opening covers the lower end of the cavity and is detachably connected to the bottom of the electromagnet.

[0007] Optionally, the material pipe is connected to a batching tank through a conveying pipe. The blower is installed at the upper end of the cavity and blows air from top to bottom. The air in the cavity can enter the material pipe downward, and the graphite powder in the material pipe is conveyed to the batching tank through the conveying pipe.

[0008] Optionally, sealing rings are fixedly arranged at the upper and lower ends of the cavity between the magnetic separation tube and the electromagnet. The sealing rings are made of rubber material and are in a ring-shaped corrugated shape, so that the cavity forms a sealed space. The upper end of the cavity is communicated with the inside of the electromagnet through a through hole, and the lower end is communicated with the heat exchange device through a liquid inlet pipe. The heat exchange device is communicated with the lower end of the side wall of the electromagnet through a liquid outlet pipe.

[0009] Optionally, heat dissipation fins fixed to the inner wall of the electromagnet are arranged in the cavity.

[0010] Compared with the prior art, the beneficial effects of the screening and iron removal machine provided by the present application are as follows:

[0011] The blower can blow air into the annular cavity in the electromagnet, so that the air in the magnetic field at the magnetic separation tube in the center of the coil flows to dissipate heat, thereby achieving the effect of cooling the joint between the inner ring surface of the coil and the inner wall of the electromagnet housing, and avoiding the influence of the temperature accumulation on one side of the magnetic separation tube, the coil and the temperature in the tube on the magnetism of the electromagnet and the service life of the equipment. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is the front view of the screening and iron removal machine provided by an embodiment of the present application;

[0014] Figure 2 It is the screening and iron removal machine provided by an embodiment of the present application Figure 1 of the top view;

[0015] Figure 3 It is the screening and iron removal machine provided by an embodiment of the present application Figure 1 of the sectional view;

[0016] Figure 4 It is the schematic diagram of the conical opening of the screening and iron removal machine provided by an embodiment of the present application communicating with the cavity;

[0017] Figure 5 It is the schematic diagram of the cavity of the screening and iron removal machine provided by an embodiment of the present application communicating with the heat dissipation device;

[0018] Figure 6 It is the top view sectional view of the heat dissipation fins of the screening and iron removal machine provided by an embodiment of the present application.

[0019] Description of the reference numerals:

[0020] Electromagnet 1; Magnetic separation tube 2; Vibration disk 3; Spring 4; Vibrator 5; Material tube 6; Slag discharge tube 7; Guide plate 8; Mesh 9; Fan 10; Retaining ring 11; Conical opening 12; Sealing ring 13; Heat exchange device 14; Liquid inlet pipe 15; Through hole 16; Liquid outlet pipe 17; Heat sink 18. Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts also belong to the scope of protection of this application.

[0022] As Figures 1 - 3 As shown, an embodiment of this application provides a screening and iron removal machine, including an electromagnet 1 with a magnetic separation tube 2 vertically inserted in the center. A vibration disk 3 is sleeved and fixed at the upper end of the magnetic separation tube 2. A plurality of springs 4 are fixed between the vibration disk 3 and the electromagnet 1. A vibrator 5 is installed on the top surface. The lower end of the magnetic separation tube 2 is provided with a material tube 6 and a slag discharge tube 7, and they are switched and communicated through a hinged guide plate 8. An annular cavity is provided between the magnetic separation tube 2 and the electromagnet 1. A fan 10 fixed to the inner wall of the electromagnet 1 is installed in the cavity. The fan 10 can blow air from one end to the other along the direction of the magnetic separation tube 2. There is a gap between the fan 10 and the magnetic separation tube 2, and it is covered by a flexible retaining ring 11.

[0023] During use, start the electromagnet 1 to generate a magnetic field in the magnetic separation tube 2. The graphite powder enters the magnetic separation tube 2 through the feeding hopper. During the falling process, the graphite powder can be intercepted and decelerated by the mesh 9. The vibrator 5 can drive the magnetic separation tube 2 and the mesh 9 to vibrate through the vibration disk 3, so that the graphite powder decelerates and falls dispersedly. The connection of the spring 4 can provide a greater amplitude for the magnetic separation tube 2. During the falling process, the iron powder particles in the graphite powder are adsorbed in the magnetic separation tube 2, and the screened graphite powder then falls through the magnetic separation tube 2 and is discharged from the material tube 6. An annular cavity is provided between the magnetic separation tube 2 and the electromagnet 1. The fan 10 installed in the cavity can blow air to cool the center of the coil in the electromagnet 1 where the magnetic separation tube 2 is located.

[0024] In this embodiment, the fan 10 can blow air into the annular cavity in the electromagnet 1, so that the air in the magnetic field at the center of the coil where the magnetic separation tube 2 is located flows and dissipates heat, thereby achieving the effect of cooling the joint between the inner ring surface of the coil and the inner wall of the electromagnet housing, and avoiding the temperature accumulation and increase on one side of the magnetic separation tube 2, which affects the magnetism of the electromagnet 1 and the service life of the equipment.

[0025] As Figure 4As shown, in a possible implementation, a conical opening 12 in a three-way connection is provided at the upper ends of the material pipe 6 and the slag discharge pipe 7, and the conical opening 12 covers the lower end of the cavity and is detachably connected to the bottom of the electromagnet 1.

[0026] The material pipe 6 and the slag discharge pipe 7 that form a three-way connection with the conical opening 12 are convenient to be detached from the lower end. After removing the material pipe 6 and the slag discharge pipe 7, the mesh sheet 9 can be taken out from below the magnetic separation tube 2, which is convenient for replacing or cleaning the mesh sheet 9 inside the pipeline.

[0027] As Figure 4 shown, in a possible implementation, the material pipe 6 is connected to the batching tank through a conveying pipe, the fan 10 is installed at the upper end of the cavity and blows air downward. The air in the cavity can enter the material pipe 6 downward, and convey the graphite powder in the material pipe 6 to the batching tank through the conveying pipe.

[0028] Connect the material pipe 6 to the batching tank through the conveying pipe. After the conical opening 12 is fixed to the bottom of the electromagnet 1, it completely covers the lower end of the cavity. The fan 10 blows air downward for heat dissipation. After the air in the cavity cools the inner wall of the electromagnet 1, it enters the material pipe 6 along the conical opening 12, and blows the graphite powder in the material pipe 6 into the batching tank through the conveying pipe for pneumatic conveying of the graphite powder.

[0029] As Figure 5 shown, in a possible implementation, sealing rings 13 are respectively fixed at the upper and lower ends of the cavity between the magnetic separation tube 2 and the electromagnet 1. The sealing rings 13 are made of rubber material in a circular corrugated shape to form a sealed space for the cavity. The upper end of the cavity is communicated with the inside of the electromagnet 1 through a through hole 16, and the lower end is communicated with a heat exchange device 14 through a liquid inlet pipe 15. The heat exchange device 14 is communicated with the lower end of the side wall of the electromagnet 1 through a liquid outlet pipe 17.

[0030] The sealing rings 13 seal the upper and lower ends of the cavity to form a sealed space. The coolant for cooling and lowering the temperature inside the electromagnet 1 directly enters the cavity through the liquid inlet pipe 15 and flows upward in the cavity to cool the joint between the inner ring surface of the coil in the cavity and the inner wall of the electromagnet housing. The coolant at the upper end of the cavity flows into the inside of the electromagnet 1 through the through hole 16, cools the coil inside the electromagnet 1, and then flows back to the heat exchange device 14 through the liquid outlet pipe 17.

[0031] The coolant can quickly exchange heat with the joint between the inner ring surface of the coil and the inner wall of the electromagnet housing to achieve a better cooling effect.

[0032] As Figure 6 shown, in a possible implementation, heat dissipation fins 18 fixed to the inner wall of the electromagnet 1 are provided in the cavity.

[0033] The heat sink 18 can effectively increase the heat exchange contact area between the inner wall of the electromagnet 1 and the coolant, further improving the heat exchange efficiency and enhancing the heat exchange and cooling effect.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A iron screening machine, comprising an electromagnet (1) with a magnetic separation tube (2) vertically inserted in the center. A vibrating disk (3) is sleeved and fixed at the upper end of the magnetic separation tube (2). A plurality of springs (4) are fixed between the vibrating disk (3) and the electromagnet (1). A vibrator (5) is installed on the top surface. A material pipe (6) and a slag discharge pipe (7) are provided at the lower end of the magnetic separation tube (2) and are switched and communicated through a hinged feeding plate (8). It is characterized in that: An annular cavity is provided between the magnetic separation tube (2) and the electromagnet (1). A blower (10) fixed to the inner wall of the electromagnet (1) is installed in the cavity. The blower (10) can blow air from one end to the other along the direction of the magnetic separation tube (2). There is a gap between the blower (10) and the magnetic separation tube (2), and it is covered by a flexible retaining ring (11).

2. The iron screening machine according to claim 1, characterized in that: The upper ends of the material pipe (6) and the slag discharge pipe (7) are provided with a conical opening (12) that is connected in a tee shape. The conical opening (12) covers the lower end of the cavity and is detachably connected to the bottom of the electromagnet (1).

3. The iron screening machine according to claim 2, characterized in that: The material pipe (6) is connected to the batching tank through a conveying pipe. The blower (10) is installed at the upper end of the cavity and blows air from top to bottom. The air in the cavity can enter the material pipe (6) downward, and the graphite powder in the material pipe (6) is conveyed to the batching tank through the conveying pipe.

4. The iron screening machine according to claim 1, characterized in that: Sealing rings (13) are respectively fixed at the upper and lower ends of the cavity between the magnetic separation tube (2) and the electromagnet (1). The sealing rings (13) are made of rubber material in an annular corrugated shape to form a sealed space for the cavity. The upper end of the cavity is connected to the inside of the electromagnet (1) through a through hole (16), and the lower end is connected to the heat exchange device (14) through a liquid inlet pipe (15). The heat exchange device (14) is connected to the lower end of the side wall of the electromagnet (1) through a liquid outlet pipe (17).

5. The iron screening machine according to claim 4, characterized in that: Heat dissipation fins (18) fixed to the inner wall of the electromagnet (1) are provided in the cavity.

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