Conductive carbon black demagnetizing device

Abstract

The utility model relates to the technical field of carbon black preparation, in particular to a conductive carbon black demagnetizing device which comprises a charging barrel, a mounting cover and a demagnetizing mechanism, the mounting cover is arranged outside the charging barrel and communicates with the charging barrel, and a slag discharging opening is formed in the mounting cover; the demagnetizing mechanism comprises a demagnetizing rotating wheel, a magnetic scraping component and a driving device; one part of the demagnetizing rotating wheel is arranged in the charging barrel, and the other part of the demagnetizing rotating wheel is arranged outside the charging barrel and is positioned in the mounting cover; the driving device is connected with the demagnetizing rotating wheel; a permanent magnet area and a non-magnetic area are formed on the wheel surface of the demagnetizing rotating wheel; the magnet scraping component is arranged in the mounting cover; the number of the demagnetizing mechanisms is at least two, and the demagnetizing mechanisms are sequentially arranged at intervals in a staggered mode in the material conveying direction. Therefore, according to the device, the structure of magnetic bars arranged side by side in the past is not used any more, the at least two demagnetizing rotating wheels which are sequentially spaced and staggered in the material conveying direction are adopted, the materials cannot be accumulated on the demagnetizing rotating wheels and cannot be taken away and discharged, and then the product yield is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of carbon black preparation, and in particular to a conductive carbon black demagnetization device. Background Art

[0002] Conductive carbon black is commonly used as a conductive agent in lithium-ion batteries to improve the conductivity of electrodes. However, the preparation process can introduce magnetic impurities, reducing the purity of the carbon black. Although the magnetic material content in conductive carbon black is at the PPM level, the inclusion of magnetic materials in lithium-ion batteries can pose serious safety risks. Magnetic particles or the accumulation of magnetic materials can cause self-discharge, reducing battery storage performance. Furthermore, magnetic particles can pierce the separator paper, causing a battery short circuit, fire, or even explosion. Therefore, the magnetic material content in conductive carbon black must be strictly controlled.

[0003] At present, the common method for removing magnetic materials from conductive carbon black during pipeline transportation is to set multiple magnetic bars side by side at intervals, and set the magnetic bars to a timed pulling state by pneumatic or electric means. During the pulling process, the magnetic bars pass through scraping rings, and the gaps between the scraping rings are used to scrape the magnetic materials adsorbed on the magnetic bars into the slag discharge bin, thereby achieving the effect of slag discharge and cleaning the magnetic bars. When using this scraping method to process powder nanomaterials, a large amount of material will accumulate on the multiple magnetic bars set side by side. In addition, because the size of the conductive carbon black is much smaller than the gap between the scraping ring and the magnetic bar, a large amount of qualified conductive carbon black will be scraped into the slag discharge bin together with the magnetic material, which will cause powder leakage, that is, many qualified products will be discharged from the slag discharge port, reducing the product yield. In addition, the process of pulling out the magnetic bar will inevitably reduce the effect of demagnetizing the powder material. Utility Model Content

[0004] The purpose of this application is to provide a conductive carbon black demagnetization device, which to a certain extent solves the technical problem in the prior art of using magnetic rods to demagnetize powder materials, which often causes powder leakage and reduces product yield and demagnetization effect.

[0005] The present application provides a conductive carbon black demagnetization device, comprising: a barrel, a mounting cover, and a demagnetization mechanism; wherein the mounting cover is arranged outside the barrel and communicates with the barrel, and the mounting cover is formed with a slag discharge port; the demagnetization mechanism comprises a demagnetization wheel, a magnetization scraping member, and a driving device; a portion of the demagnetization wheel is arranged inside the barrel, and another portion of the demagnetization wheel is arranged outside the barrel and located inside the mounting cover;

[0006] The driving device is connected to the demagnetizing wheel and is used to rotate the demagnetizing wheel; the wheel surface of the demagnetizing wheel is formed with a permanent magnetic area and a non-magnetic area, and the wheel surface of the permanent magnetic area is used to adsorb magnetic materials in the material conveyed into the barrel; the scraping member is arranged in the mounting cover, and is used to block and push the magnetic materials adsorbed on the wheel surface of the permanent magnetic area to be enriched on the wheel surface of the non-magnetic area; the number of the demagnetizing mechanisms is at least two, and they are sequentially spaced and staggered along the conveying direction of the material, so that the material can contact the wheel surface of the permanent magnetic area at least once during the conveying process.

[0007] In the above technical solution, further, the demagnetization mechanism also includes a discharge pipe and a buffer bin; wherein, one end of the discharge pipe is connected to the slag discharge port of the mounting cover, and the other end of the discharge pipe is connected to the inlet end of the buffer bin, and the magnetic material adsorbed on the wheel surface of the permanent magnetic zone can enter the discharge pipe after being scraped off by the scraping member, and be discharged into the buffer bin through the discharge pipe.

[0008] In any of the above technical solutions, further, the demagnetization mechanism also includes a first valve and a second valve; wherein, the first valve is arranged between the inlet end of the buffer bin and the discharge pipe, and is used to open or close the inlet end of the buffer bin; the second valve is arranged at the outlet end of the buffer bin, and is used to open or close the outlet end of the buffer bin.

[0009] In any of the above technical solutions, further, the demagnetization mechanism also includes a pressure balancing pipe, and one end of the pressure balancing pipe is connected to the discharge pipe, and the other end of the pressure balancing pipe is connected to the buffer bin.

[0010] In any of the above technical solutions, further, the demagnetization mechanism also includes a pressure differential sensor and a third valve, and the pressure differential sensor and the third valve are both arranged on the pressure balancing pipe fitting, and the pressure differential sensor is used to detect the pressure difference between the barrel and the buffer bin, and the third valve is used to control the opening or closing of the pressure balancing pipe fitting.

[0011] In any of the above technical solutions, further, the first valve, the second valve and the third valve are all solenoid valves; the conductive carbon black demagnetization device also includes a controller, and the controller is respectively communicated with the first valve, the second valve, the third valve and the pressure difference sensor.

[0012] In any of the above technical solutions, further, the barrel is arranged along the vertical direction, and the material conveying direction is the vertical direction; the demagnetization mechanism is arranged on the side of the barrel, and along the vertical direction, the demagnetization wheel is arranged below the scraping component, the discharge pipe is arranged below the mounting cover, and the buffer bin is arranged below the discharge pipe.

[0013] In any of the above technical solutions, further, the demagnetization mechanism also includes a slag discharge stopper, which is arranged in the mounting cover, and the slag discharge stopper is close to the connection between the mounting cover and the discharge pipe and away from the scraping member.

[0014] In any of the above technical solutions, further, the barrel is formed with an avoidance opening, another part of the structure of the demagnetizing wheel extends into the mounting cover through the avoidance opening, and an avoidance gap is formed between the demagnetizing wheel and the side wall of the avoidance opening.

[0015] In any of the above technical solutions, further, the area where the wheel surface of the permanent magnetic zone initially contacts the magnetic scraping component is arranged corresponding to the slag discharge port.

[0016] In any of the above technical solutions, further, the ratio of the wheel surface area of ​​the permanent magnetic region to the wheel surface area of ​​the non-magnetic region is a, and a=2 or 3.

[0017] In any of the above technical solutions, further, along the conveying direction of the material, openings are formed at both ends of the barrel.

[0018] In any of the above technical solutions, further, the driving device is arranged outside the barrel, and the driving end of the driving device passes through the barrel and is connected to the demagnetizing wheel.

[0019] In any of the above technical solutions, further, the driving device is a motor.

[0020] In any of the above technical solutions, further, the material of the magnetic scraping component is graphite material or polymer material.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The conductive carbon black demagnetization device provided in the present application uses a demagnetization wheel for demagnetization. During the demagnetization operation, the material enters the barrel through the feed port and passes through two demagnetization wheels rotating in opposite directions. One area on the demagnetization wheel is a non-magnetic area, and the other area is a permanent magnetic area, ensuring that the material can contact the permanent magnetic area at least once during the transportation process. The magnetic material adsorbed by the demagnetization wheel will reach the scraping component with the demagnetization wheel, and the scraping component will push the magnetic material to the non-magnetic area of ​​the demagnetization wheel. Finally, the magnetic material falls off to the slag discharge port in the non-magnetic area, thereby discharging the waste material. The material will not accumulate on the demagnetization wheel and will not be carried away and discharged, thereby ensuring the yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic structural diagram of the conductive carbon black demagnetization device provided in an embodiment of the present application.

[0025] Reference numerals:

[0026] 1-barrel, 2-installation cover, 21-slag discharge port, 3-demagnetization mechanism, 31-demagnetization wheel, 311-permanent magnetic area, 312-non-magnetic area, 32-scraping magnetic component, 33-discharge pipe, 34-buffer bin, 35-first valve, 36-second valve, 37-pressure balance pipe, 38-differential pressure sensor, 39-slag discharge stopper. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0028] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0029] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] Refer to the following Figure 1 The conductive carbon black demagnetization device according to some embodiments of the present application is described.

[0033] See also Figure 1 As shown, an embodiment of the present application provides a conductive carbon black demagnetization device, comprising: a barrel 1, a mounting cover 2, and a demagnetization mechanism 3; wherein the barrel 1 is connected to a pipeline for conveying powder materials (not shown in the figure); the mounting cover 2 is arranged outside the barrel 1 and is connected to the barrel 1, and the mounting cover 2 is formed with a slag discharge port 21; the demagnetization mechanism 3 includes a demagnetization wheel 31, a magnetization scraping member 32, and a driving device; a portion of the demagnetization wheel 31 is arranged inside the barrel 1, and the other portion of the demagnetization wheel 31 is arranged outside the barrel 1 and located inside the mounting cover 2;

[0034] The driving device is connected to the demagnetizing wheel 31 and is used to rotate the demagnetizing wheel 31; the demagnetizing wheel 31 is formed with a permanent magnetic area 311 and a non-magnetic area 312, and the wheel surface of the permanent magnetic area 311 is used to adsorb the magnetic material in the material transported into the barrel 1; the scraping member 32 is arranged in the mounting cover 2, and blocks and pushes the magnetic material adsorbed on the wheel surface of the permanent magnetic area 311 to be enriched on the wheel surface of the non-magnetic area 312; the number of the demagnetizing mechanisms 3 is at least two, and they are sequentially spaced and staggered along the conveying direction of the material, so that the material can contact the wheel surface of the permanent magnetic area 311 at least once during the conveying process.

[0035] According to the structure described above, the conductive carbon black demagnetization device provided in the present application uses a demagnetization wheel 31 for demagnetization. During the demagnetization operation, the material enters the barrel 1 through the feed port of the barrel 1 and passes through two demagnetization wheels 31 respectively. Each demagnetization wheel 31 includes a permanent magnetic area 311 and a non-magnetic area 312, ensuring that the material can contact the wheel surface of the permanent magnetic area 311 at least once during the transportation process, and then can adsorb the magnetic material in the material. The magnetic material adsorbed by the demagnetization wheel 31 will reach the edge of the scraping component 32 with the demagnetization wheel 31. The scraping component 32 will prevent the magnetic material from being enriched to the wheel surface of the non-magnetic area 312 of the demagnetization wheel 31. Finally, the magnetic material falls off from the wheel surface of the non-magnetic area 312 to the slag discharge port 21, thereby discharging the waste material. (It should be noted that the non-magnetic area 312 greatly weakens the magnetic adsorption force of the wheel surface of the permanent magnetic area 311 on the magnetic material, and the magnetic material falls off through the slag discharge port 21 under the obstruction of the scraping member 32 and the action of its own gravity).

[0036] It can be seen that the conductive carbon black demagnetization device in the present application no longer uses the previous structure of magnetic rods arranged side by side, but adopts at least two demagnetization wheels 31 that are sequentially spaced and staggered along the material conveying direction. The material will not accumulate on the demagnetization wheel 31, and will not be carried away and discharged, thereby ensuring the yield of the product.

[0037] Further, preferably, Figure 1 As shown, along the conveying direction of the material, openings are formed at both ends of the barrel 1, and both open ends are connected to the material conveying pipeline. Of course, it is not limited to this and can also be designed according to actual needs.

[0038] Further, preferably, Figure 1 As shown, the barrel 1 is formed with a avoidance opening, and another part of the structure of the demagnetizing wheel 31 extends into the mounting cover 2 through the avoidance opening, that is, the avoidance gap is communicated with the interior of the mounting cover 2, so that it can play the role of avoiding the demagnetizing wheel 31, and preferably, a gap is formed between the demagnetizing wheel 31 and the side wall of the avoidance opening, which can ensure that the demagnetizing wheel 31 can rotate freely to avoid interference.

[0039] Furthermore, preferably, the number of demagnetization mechanisms 3 is two, and they are sequentially spaced and staggered along the conveying direction of the material. Of course, the number of demagnetization mechanisms 3 is not limited to two, but can also be one or more than two, such as three, four or five, etc., depending on actual needs.

[0040] It should be noted that the permanent magnetic area 311 and the non-magnetic area 312 are not limited to the surface area of ​​the wheel. For example, a cylinder is three-quarters magnet and one-quarter non-magnet, so that three-quarters of the wheel surface can directly contact the powder, and the wheel surface can absorb magnetic materials. Of course, it is not limited to this, and this structure is just an example.

[0041] In this embodiment, preferably, Figure 1 As shown, the demagnetization mechanism 3 also includes a discharge pipe 33 and a buffer bin 34; wherein, one end of the discharge pipe 33 is connected to the slag discharge port 21 of the mounting cover 2, and the other end of the discharge pipe 33 is connected to the inlet end of the buffer bin 34. The magnetic material adsorbed on the wheel surface of the permanent magnetic area 311 can enter the discharge pipe 33 after being scraped off by the scraping member 32, and is discharged into the buffer bin 34 through the discharge pipe 33.

[0042] According to the structure described above, the buffer bin 34 is used to store magnetic materials to avoid direct discharge into the environment and causing workshop pollution, and the discharge pipe 33 serves to transport the scraped materials to the buffer bin 34.

[0043] It should be noted that the aforementioned discharge pipe 33 and buffer bin 34 may not be provided, and the magnetic material may be directly received in a container at the slag discharge port 21 of the mounting cover 2 , which is selected according to actual needs.

[0044] In this embodiment, preferably, Figure 1 As shown, the demagnetization mechanism 3 also includes a first valve 35 and a second valve 36; wherein, the first valve 35 is arranged between the inlet end of the buffer bin 34 and the discharge pipe 33, and is used to open or close the inlet end of the buffer bin 34; the second valve 36 is arranged at the outlet end of the buffer bin 34, and is used to open or close the outlet end of the buffer bin 34.

[0045] According to the structure described above, it can be seen that when the conductive carbon black demagnetization device is initially working, the first valve 35 and the second valve 36 are closed, and magnetic material accumulates in the discharge pipe 33. When a large amount of magnetic material, that is, waste material, accumulates in the discharge pipe 33 and needs to be discharged to the buffer bin 34, the first valve 35 is opened to discharge the magnetic material in the discharge pipe 33 into the buffer bin 34 for storage, and then the first valve 35 is closed. When the magnetic material stored in the buffer bin 34 is sufficient, the second valve 36 can be opened to discharge the magnetic material in the buffer bin 34 into other containers, and then the second valve 36 is closed to prevent air or impurities from being sucked back into the barrel 1 and to facilitate the recycling of the device.

[0046] In this embodiment, preferably, Figure 1 As shown, the demagnetization mechanism 3 further includes a pressure balancing pipe 37 , and one end of the pressure balancing pipe 37 is connected to the discharge pipe 33 , and the other end of the pressure balancing pipe 37 is connected to the buffer bin 34 .

[0047] Further, preferably, Figure 1As shown, the demagnetization mechanism 3 also includes a pressure differential sensor 38 and a third valve, and the pressure differential sensor 38 and the third valve are both arranged on the pressure balancing pipe 37, and the pressure differential sensor 38 is used to detect the pressure difference between the barrel 1 and the buffer bin 34, and the third valve is used to control the opening or closing of the pressure balancing pipe 37.

[0048] According to the structure described above, when the conductive carbon black demagnetization device is initially working, the first valve 35 and the second valve 36 are closed, and magnetic material accumulates in the discharge pipe 33. When a large amount of magnetic material, that is, waste material, accumulates in the discharge pipe 33 and needs to be discharged to the buffer bin 34, the pressure difference sensor 38 detects the pressure difference between the buffer bin 34 and the discharge pipe 33 (it should be noted that the discharge pipe 33, the mounting cover 2 and the barrel 1 are connected in sequence, so the pressures of the discharge pipe 33, the mounting cover 2 and the barrel 1 are equal). If the pressures in the buffer bin 34 and the discharge pipe 33 are unbalanced, the third valve is opened to open the pressure balancing pipe 37, and the pressures of the two are adjusted to balance each other, so that the magnetic material in the discharge pipe 33 can be discharged smoothly. The magnetic material in the discharge pipe 33 is discharged into the buffer bin 34, thereby preventing the magnetic material that should be discharged from entering the barrel 1 or the demagnetized material from being sucked into the buffer bin 34 due to the pressure difference (it should be noted that if the pressure difference sensor 38 detects that the pressure in the buffer bin 34 and the discharge pipe 33 is balanced, there is no need to open the third valve, that is, there is no need to open the pressure balance pipe 37 to adjust the pressure), and then open the first valve 35 to discharge the magnetic material in the discharge pipe 33 into the buffer bin 34 for storage, and then close the first valve 35. When the magnetic material stored in the buffer bin 34 is sufficient, the second valve 36 can be opened to discharge the magnetic material in the buffer bin 34 into other containers, and then the second valve 36 can be closed, which is conducive to the recycling of the device.

[0049] It should be noted that the aforementioned first valve 35, second valve 36, pressure balancing pipe 37, differential pressure sensor 38 and third valve may not be provided, and the selection is made according to actual needs.

[0050] In this embodiment, preferably, Figure 1 As shown, the first valve 35, the second valve 36 and the third valve are all solenoid valves; the conductive carbon black demagnetization device also includes a controller, and the controller is communicated with the first valve 35, the second valve 36, the third valve and the pressure difference sensor 38 respectively.

[0051] According to the structure described above, the controller can realize automatic control of the first valve 35, the second valve 36, the third valve and the pressure difference sensor 38, so that the degree of automation of the device is higher. Moreover, the controller that can control the operation of the above-mentioned valve components is relatively common and will not be described in detail here.

[0052] In this embodiment, preferably, Figure 1 As shown, the demagnetization mechanism 3 also includes a slag discharge stopper 39, which is arranged on the inner wall of the mounting cover 2. The slag discharge stopper 39 is close to the connection between the mounting cover 2 and the discharge pipe 33 and away from the magnetic scraping component 32.

[0053] According to the structure described above, a slag discharge port 21 is provided below the demagnetizing wheel 31, and a magnetic scraping member 32 is provided above the demagnetizing wheel 31. When the demagnetizing wheel 31 rotates, the demagnetizing wheel 31 will carry weak magnetic and magnetic materials to the top of the slag discharge port 21. A slag discharge stopper 39 is provided between the slag discharge port 21 and the normal material channel (the gap between the slag discharge stopper 39 and the wheel is adjusted according to the material characteristics, such as: particle size, density index, for materials with small particle size, the gap can be appropriately reduced accordingly, and for materials with large particle size, the gap can be appropriately increased accordingly) to avoid the demagnetized material After entering the discharge pipe 33, some weakly magnetic materials will automatically fall to the slag discharge port 21 under the action of gravity and magnetism, and the strong magnetic materials will move along the wheel surface of the permanent magnetic area 311 of the demagnetizing wheel 31 to the scraping member 32. The scraping member 32 will push the magnetic material to the wheel surface of the non-magnetic area 312 of the demagnetizing wheel 31. Finally, the magnetic material falls off the wheel surface of the non-magnetic area 312 to the slag discharge port 21, completing the demagnetization and slag collection work (it should be noted that: the two demagnetizing wheels 31 are distributed up and down, and operate with staggered magnetism to ensure that the passing material can always pass through the permanent magnetic area).

[0054] Furthermore, preferably, the slag discharge stopper 39 is provided close to the slag discharge port 21 .

[0055] In this embodiment, preferably, Figure 1 As shown, the area of ​​the wheel surface of the permanent magnetic area 311 that initially contacts the scraping member 32 is set corresponding to the slag discharge port 21.

[0056] According to the structure described above, it can be seen that as the demagnetizing wheel 31 rotates, the area where the wheel surface of the permanent magnetic area 311 initially contacts the scraping member 32 corresponds to the slag discharge port 21. This ensures that after the entire area of ​​the permanent magnetic area 311 contacts the scraping member 32, the scraping member 32 will push the magnetic material to the wheel surface of the non-magnetic area 312 of the demagnetizing wheel 31. Finally, the magnetic material falls off the wheel surface of the non-magnetic area 312 to the slag discharge port 21, completing the demagnetization and slag collection work. In addition, under this structural setting, along the height direction of the barrel 1 from top to bottom, the rotation directions of any two adjacent demagnetizing wheels 31 are opposite, for example: the demagnetizing wheel 31 of one of the demagnetizing mechanisms 3 rotates clockwise, and the demagnetizing wheel 31 of the other demagnetizing mechanism 3 rotates counterclockwise.

[0057] Further, preferably, Figure 1As shown, the barrel 1 is arranged in the vertical direction, and the conveying direction of the material is also in the vertical direction. Correspondingly, the top and bottom of the barrel 1 are formed with openings, so that the material can be put into the barrel 1 from the top, and the material automatically falls under the action of gravity, and then passes through multiple demagnetization wheels 31 in sequence for demagnetization;

[0058] The mounting cover 2, the discharge pipe 33 and the buffer bin 34 are all arranged on the side of the barrel 1. That is, each demagnetization mechanism 3 is arranged on the side of the barrel 1. This can make full use of the space on the side of the barrel 1, and multiple demagnetization mechanisms 3 can also be effectively avoided to avoid interference.

[0059] Along the vertical direction, the demagnetizing wheel 31 is arranged below the magnetic scraping component 32, the discharge pipe 33 is arranged below the mounting cover 2, and the buffer bin 34 is arranged below the discharge pipe, so that some weakly magnetic materials will fall to the slag discharge port 21 under the action of obstruction and gravity.

[0060] It should be noted that the orientation of the barrel 1 and the demagnetization mechanism 3 is not limited to the above. When the material enters the barrel 1 under the external force provided by the negative pressure device or the positive pressure device, the barrel 1 can also be placed at an angle or horizontally. In this case, the demagnetization mechanism 3 arranged on the side of the barrel 1 will also change its orientation, which can be selected according to actual needs.

[0061] In this embodiment, preferably, Figure 1 As shown, the ratio of the wheel surface area of ​​the permanent magnet region 311 to the wheel surface area of ​​the non-magnetic region 312 is a, and a=3.

[0062] Based on the structure described above, the permanent magnetic region 311 occupies 3 / 4 of the wheel surface, while the non-magnetic region 312 occupies 1 / 4. This ensures sufficient area for magnetic material to be attracted, thereby enhancing the demagnetization effect. Of course, the ratio of the wheel surface area occupied by the permanent magnetic region 311 and the non-magnetic region 312 is not limited to the above ratio and can be adjusted according to actual needs. For example, a = 2 can be used, meaning that the permanent magnetic region 311 occupies 2 / 3 of the wheel surface, while the non-magnetic region 312 occupies 1 / 3 of the wheel surface. This also ensures sufficient area for magnetic material to be attracted, thereby enhancing the demagnetization effect.

[0063] In this embodiment, preferably, Figure 1 As shown, the scraping member 32 is a block, that is, a curved scraping block, which can effectively scrape the magnetic material from the surface of the demagnetizing wheel 31, and has a simple structure and is easy to manufacture. Furthermore, preferably, the scraping member 32 extends along the rotation direction of the wheel surface of the demagnetizing wheel 31 and the thickness direction of the demagnetizing wheel 31.

[0064] Of course, the structure of the magnetic scraping member 32 is not limited to this, and the magnetic scraping member 32 may also be a plate. Furthermore, preferably, the scraper is arranged perpendicular to the rotation direction of the demagnetizing wheel 31, and the scraper may extend along the thickness direction of the demagnetizing wheel 31. Of course, the structure of the magnetic scraping member 32 is not limited to this, and can be selected according to actual needs.

[0065] In this embodiment, preferably, Figure 1 As shown, the driving device is arranged outside the barrel 1 , and the driving end of the driving device passes through the barrel 1 and is connected to the demagnetizing wheel 31 .

[0066] According to the structure described above, the drive device is arranged outside the barrel 1, thereby preventing the material from entering the drive device and affecting the operation of the drive device. Of course, it is not limited to this, and the drive device can also be installed in the barrel 1, specifically according to actual needs.

[0067] Further, preferably, the driving device is a motor.

[0068] In this embodiment, preferably, Figure 1 As shown, the scraping member 32 is made of graphite or a polymer material that does not have magnetic attraction properties, thereby being able to scrape off the magnetic material on the surface of the demagnetizing wheel 31. In particular, when the scraping member is made of graphite, it has a certain lubricating function to prevent sticking. Of course, the material of the scraping member 32 is not limited to the above, and can also be other materials that do not have magnetic attraction properties.

[0069] In summary, the detailed working process of this conductive carbon black demagnetization device is as follows:

[0070] During the demagnetization operation, the material enters the barrel 1 through the feed port of the barrel 1 and passes through two demagnetization wheels 31 respectively. Each demagnetization wheel 31 includes a permanent magnetic area 311 and a non-magnetic area 312, ensuring that the material can contact the wheel surface of the permanent magnetic area 311 at least once during the transportation process, and then the magnetic material in the material can be adsorbed by the wheel surface of the permanent magnetic area 311 on the demagnetization wheel 31. When the demagnetization wheel 31 rotates, the demagnetization wheel 31 will rotate with the magnetic material to the top of the slag discharge port 21. A discharge port 21 is set between the slag discharge port 21 and the normal material channel. The slag stopper 39 prevents the demagnetized material from entering the discharge pipe 33. Some weakly magnetic materials will automatically fall to the slag discharge port 21 under the action of gravity, and the strong magnetic materials will move along the wheel surface of the permanent magnetic area 311 of the demagnetizing wheel 31 to the scraping member 32. The scraping member 32 blocks the magnetic material from reaching the non-magnetic area 312 of the demagnetizing wheel 31. Finally, the magnetic material falls off to the slag discharge port 21 in the non-magnetic area 312, completing the demagnetization and slag collection work (the two demagnetizing wheels 31 are distributed up and down, and operate with staggered magnetism to ensure that the passing material can always pass through the permanent magnetic area).

[0071] When the conductive carbon black demagnetization device is initially working, the first valve 35 and the second valve 36 are closed, and magnetic material accumulates in the discharge pipe 33. When a large amount of magnetic material, that is, waste material, accumulates in the discharge pipe 33 and needs to be discharged to the buffer bin 34, the pressure difference sensor 38 detects the pressure difference between the buffer bin 34 and the discharge pipe 33 (it should be noted that the discharge pipe 33, the mounting cover 2 and the barrel 1 are connected in sequence, so the pressures of the discharge pipe 33, the mounting cover 2 and the barrel 1 are equal). If the pressures in the buffer bin 34 and the discharge pipe 33 are unbalanced, the third valve is opened, so that the pressure balancing pipe 37 is opened, and the pressures of the two are adjusted to be balanced to avoid the pressure difference causing this. The discharged magnetic material enters the barrel 1 or the demagnetized material is sucked into the buffer bin 34, and other problems occur (it should be noted that if the pressure difference sensor 38 detects that the pressure in the buffer bin 34 and the discharge pipe 33 is balanced, there is no need to open the third valve, that is, there is no need to open the pressure balance pipe 37 to adjust the pressure), and then open the first valve 35 to discharge the magnetic material in the discharge pipe 33 into the buffer bin 34 for storage, and then close the first valve 35. When the magnetic material stored in the buffer bin 34 is sufficient, the second valve 36 can be opened, and the magnetic material in the buffer bin 34 can be discharged into other containers, and then the second valve 36 can be closed, which is conducive to the recycling of this device.

[0072] The demagnetizing wheel 31 is used to remove the magnetic particles from the hopper 1 , and the demagnetizing wheel 31 is used to remove the magnetic particles from the hopper 1 .

[0073] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A conductive carbon black demagnetization device, characterized in that: include: A barrel, a mounting cover, and a demagnetization mechanism; wherein the mounting cover is arranged outside the barrel and communicates with the barrel, and the mounting cover is formed with a slag discharge port; the demagnetization mechanism includes a demagnetization wheel, a magnetization scraping member, and a driving device; a portion of the demagnetization wheel is arranged inside the barrel, and another portion of the demagnetization wheel is arranged outside the barrel and located inside the mounting cover; The driving device is connected to the demagnetizing wheel and is used to rotate the demagnetizing wheel; the wheel surface of the demagnetizing wheel is formed with a permanent magnetic area and a non-magnetic area, and the wheel surface of the permanent magnetic area is used to adsorb magnetic materials in the material conveyed into the barrel; the scraping member is arranged in the mounting cover, and is used to block and push the magnetic materials adsorbed on the wheel surface of the permanent magnetic area to be enriched on the wheel surface of the non-magnetic area; the number of the demagnetizing mechanisms is at least two, and they are sequentially spaced and staggered along the conveying direction of the material, so that the material can contact the wheel surface of the permanent magnetic area at least once during the conveying process.

2. The conductive carbon black demagnetization device according to claim 1, characterized in that: The demagnetization mechanism also includes a discharge pipe and a buffer bin; wherein, one end of the discharge pipe is connected to the slag discharge port of the mounting cover, and the other end of the discharge pipe is connected to the inlet end of the buffer bin. The magnetic material adsorbed on the wheel surface of the permanent magnetic area can enter the discharge pipe after being scraped off by the scraping member, and is discharged into the buffer bin through the discharge pipe.

3. The conductive carbon black demagnetization device according to claim 2, characterized in that: The demagnetization mechanism also includes a first valve and a second valve; wherein, the first valve is arranged between the inlet end of the buffer bin and the discharge pipe, and is used to open or close the inlet end of the buffer bin; the second valve is arranged at the outlet end of the buffer bin, and is used to open or close the outlet end of the buffer bin.

4. The conductive carbon black demagnetization device according to claim 3, characterized in that: The demagnetization mechanism further includes a pressure balancing pipe, one end of which is connected to the discharge pipe, and the other end of which is connected to the buffer bin.

5. The conductive carbon black demagnetization device according to claim 4, characterized in that: The demagnetization mechanism also includes a pressure differential sensor and a third valve, and the pressure differential sensor and the third valve are both arranged on the pressure balancing pipe fitting, and the pressure differential sensor is used to detect the pressure difference between the barrel and the buffer bin, and the third valve is used to control the opening or closing of the pressure balancing pipe fitting.

6. The conductive carbon black demagnetization device according to claim 5, characterized in that: The first valve, the second valve and the third valve are all solenoid valves; the conductive carbon black demagnetization device also includes a controller, and the controller is respectively communicated with the first valve, the second valve, the third valve and the pressure difference sensor.

7. The conductive carbon black demagnetization device according to claim 2, characterized in that: The barrel is arranged in a vertical direction, and the material conveying direction is vertical; the demagnetization mechanism is arranged on the side of the barrel, and along the vertical direction, the demagnetization wheel is arranged below the magnetic scraping member, the discharge pipe is arranged below the mounting cover, and the buffer bin is arranged below the discharge pipe; and / or The demagnetization mechanism further includes a slag discharge stopper, which is arranged in the installation cover and is close to the connection between the installation cover and the discharge pipe and away from the magnetic scraping component.

8. The conductive carbon black demagnetization device according to claim 1, characterized in that: The barrel is formed with an escape opening, another part of the structure of the demagnetizing wheel extends into the mounting cover through the escape opening, and an escape gap is formed between the demagnetizing wheel and the side wall of the escape opening.

9. The conductive carbon black demagnetization device according to claim 1, characterized in that: The area where the wheel surface of the permanent magnetic zone and the magnetic scraping member initially contact each other is arranged to correspond to the slag discharge port; and / or The ratio of the wheel surface area of ​​the permanent magnetic region to the wheel surface area of ​​the non-magnetic region is a, and a=2 or 3.

10. The conductive carbon black demagnetization device according to any one of claims 1 to 9, characterized in that: Along the conveying direction of the material, both ends of the barrel are formed with openings; and / or The driving device is arranged outside the barrel, and the driving end of the driving device passes through the barrel and is connected to the demagnetizing wheel; and / or The driving device is a motor; and / or The material of the magnetic scraping component is graphite material or polymer material.

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