Method and system for removing iron from crushed electrode paste raw material

Abstract

This application relates to a method and system for removing iron from electrode paste raw materials after crushing. The method utilizes a material conveyor belt to transport residual anodes at fixed intervals, passing them below the iron remover body to reduce the "magnetic curtain effect." The height difference between the leading edge of the iron remover body and the material pile is adjusted based on the thickness of the material pile before it enters the magnetic field range of the iron remover body. This fully utilizes the attraction of the magnetic field on material piles of any thickness, effectively preventing the desired material from being mistakenly screened out when the material pile thickness is higher than the bottom plane of the iron remover body. The gradually decreasing thickness of the material pile is obtained sequentially along the material pile's movement path. The height difference between the trailing edge of the iron remover body and the material pile is adjusted based on multiple thickness values. This ensures that the attraction of the iron remover body to the fine iron-containing impurities buried in the lower layer of the material pile by materials of normal particle size increases progressively. This allows the horizontal component of the inclined magnetic field to overcome part of the resistance from the downward pressure of the material, improving the screening rate of small and medium-sized iron-containing impurity blocks pressed by the material.

Description

Technical Field

[0001] This application belongs to the field of electrode paste production technology, and specifically relates to a method and system for removing iron after crushing electrode paste raw materials. Background Technology

[0002] Residual anodes, as one of the raw materials for electrode paste production, benefit from their high alumina content and low price, which helps reduce production costs and losses. After crushing and impurity removal, residual anodes yield uniformly sized particles, which helps improve the purity and uniformity of the electrode paste. However, the quality of recycled residual anodes varies greatly, and even after primary crushing, they still contain a significant amount of iron-containing impurities. This not only easily exacerbates the wear of the crusher but also reduces the uniformity of the electrode paste raw materials.

[0003] In existing technologies, a conveyor belt is typically installed after crushing to transport the crushed particles, and a belt-type iron separator is installed above the conveyor belt for iron removal. During operation, the belt of the iron separator is parallel to the conveyor belt, and a uniform magnetic field created by magnets is used to attract impurities with high iron content. Simultaneously, the belt separates the attracted impurities. To ensure material throughput efficiency, the belt-type iron separator needs to maintain a certain distance from the conveyor belt within its magnetic field range. However, due to the uneven material accumulation height on the conveyor belt, and the influence of the jaw crusher's crushing and feeding process causing the particle size to gradually decrease from top to bottom, the belt-type iron separator positioned parallel above the conveyor belt presents the following problems: Small iron impurities located at the bottom of the material pile are affected by the pressure of the material above them and are also at the edge of the magnet's adsorption range. This results in the belt-type iron separator being far more effective at removing large iron impurities from the upper layer than removing small iron impurities, leading to poor uniformity of the electrode paste raw material. Summary of the Invention

[0004] Based on the aforementioned technical needs, this application provides a method for removing iron from electrode paste raw materials after crushing. This method addresses the problem in the prior art where the material accumulation height on the conveyor belt is uneven, and the material's particle size affects the accumulation of small pieces at the bottom and large pieces at the top. As a result, belt iron separators are far more effective at removing large iron impurities than small iron impurities. A large number of small iron impurities are easily not selected due to material pressure and distance, leading to poor uniformity of the electrode paste raw materials.

[0005] To achieve the above objectives, the technical solution of this application is as follows: A method for removing iron from electrode paste raw materials after crushing includes the following steps: S1. Based on the material conveyor belt transporting the material piles passing under the iron removal machine body, control the adjacent spacing D of the material piles on the material conveyor belt to be no less than the magnetic field length L distributed along the transport direction of the material conveyor belt of the iron removal machine body; S2. Obtain the thickness of the material pile at the first position. ,based on Adjust the height difference between the leading edge of the iron removal machine body and the material pile , 0≤ ≤ Wherein, the first position is located before the coverage range of the magnetic field of the iron separator body in the transport direction, and H represents the maximum distance that the magnetic field of the iron separator body can cover in the height direction; S3. Along the movement path of the material pile, obtain the thickness of the material pile at the second position, the third position, ..., the nth position. , ... ,like < ,based on Adjust the height difference between the rear edge of the iron remover body and the material pile. ,in, The second, third, ... nth positions are all located within the coverage area of ​​the magnetic field length L distributed along the material conveyor belt transport direction of the iron removal machine body; S4. Repeat steps S2 to S3.

[0006] Preferably, step S3 further includes adjusting the front and rear edges of the iron separator body to the same horizontal height within time T after the material pile has passed through the range of the magnetic field length L distributed along the material conveyor belt of the iron separator body. Where M represents the distance between the first position and the leading edge of the iron removal machine body, and V represents the transport speed of the material conveyor belt.

[0007] Preferably, the nth position does not exceed the length L of the magnetic field distributed along the material conveyor belt transport direction of the iron removal machine body. .

[0008] To implement the above-mentioned method for removing iron after crushing electrode paste raw materials, this application also discloses an iron removal system for crushing electrode paste raw materials, including an iron removal machine body, a support, a material conveyor belt, and a controller. At least one pair of telescopic drive rods are symmetrically arranged at the top of the support along the vertical direction, and the bottom ends of each telescopic drive rod are rotatably connected to the iron removal machine body. The material conveyor belt passes through the support and is located below the iron removal machine body. Several material thickness sensors are arranged along the conveying direction of the material conveyor belt, and each material thickness sensor is electrically connected to the controller and the telescopic drive rods. The controller includes a storage device, a processor, and a computer program stored in the storage device and executable on the processor. When the computer program is executed by the processor, it implements the steps of the method for removing iron after crushing electrode paste raw materials.

[0009] Preferably, the iron removal machine body includes a mounting frame, a plurality of drive rollers and a drive motor. The telescopic drive rods are symmetrically distributed on both sides of the mounting frame and are rotatably engaged with the mounting frame. A magnet is provided inside the mounting frame. The bottom of the magnet is flat. The plurality of drive rollers are symmetrically distributed above and below the magnet and are rotatably connected to the mounting frame. The drive motor is located on one side of the mounting frame, and its output end is connected to any of the drive rollers. An iron removal belt is provided around the drive roller.

[0010] Preferably, a plurality of suspension members are symmetrically distributed on both sides of the mounting frame, and the two ends of the suspension members are respectively connected to the mounting frame and the bracket by snap-fit.

[0011] Preferably, the suspension component includes a first connecting rod and a second connecting rod. One end of the first connecting rod and the second connecting rod is provided with a flexible cable. One end of the flexible cable is connected to a buckle. The ends of the first connecting rod and the second connecting rod away from the flexible cable are rotated and telescopically engaged by threads. The bracket and the mounting frame are provided with hanging rings on opposite sides. The buckle is engaged with the hanging ring.

[0012] Preferably, a plurality of correction rollers are rotatably provided on one side of the mounting frame. The correction rollers are distributed at one end of the drive roller and their axial direction is perpendicular to the iron removal belt. The side of the iron removal belt is in rolling contact with the correction rollers.

[0013] Preferably, a buffer assembly is provided between the bottom of the magnet and the iron removal belt, and there are several pairs of buffer assemblies, which are symmetrically distributed between a pair of drive rollers. The iron removal belt is in at least partial rolling contact with the buffer assembly.

[0014] Preferably, the buffer assembly includes a pair of shock-absorbing cylinders and a follower roller. The pair of shock-absorbing cylinders are symmetrically distributed at both ends of the drive roller and one end of the cylinder is rotatably connected to the mounting frame. The two ends of the follower roller are respectively in rolling engagement with the pair of shock-absorbing cylinders, and the inner side of the iron removal belt is in rolling contact with the follower roller.

[0015] By adopting the above technical solution, compared with the prior art, this application has at least the following beneficial effects: 1. By controlling the material pile to maintain an appropriate spacing when passing through the magnetic field, it is possible to avoid the continuous adsorption of fine iron-containing impurities by the magnet, which would induce the "magnetic curtain effect" and reduce the iron removal efficiency. It can also alleviate the severe heating phenomenon caused by the continuous adsorption of a large number of iron-containing impurities by the electromagnet. Second, by adjusting the height of the iron removal machine body in real time based on the pre-obtained thickness of the material pile, the magnetic field can be fully utilized to attract material piles of any thickness, and the problem of the required material being mistakenly screened out when the thickness of the material pile is higher than the bottom plane of the iron removal machine body can be effectively prevented. Third, by continuously acquiring the thickness value of the material pile within the length range of the magnetic field, the height of the rear edge of the iron separator body is adjusted in real time. This ensures that the center position of the magnetic field of the iron separator body decreases as the material thickness decreases, thus gradually increasing the attraction of the iron separator body to the fine iron-containing impurities buried in the lower layer of the material pile by materials of normal particle size. At the same time, the bottom of the iron separator body is tilted relative to the material pile. The tilted magnetic field generates an attraction in both the tilted and vertical directions to the iron-containing impurities. Its horizontal component allows the iron-containing impurities in the lower layer to overcome part of the resistance of the material pressing down. This makes it easier for the small and medium-sized impurity blocks with low iron content that are pressed down by the material in the lower layer to be attracted by the magnet and scraped away from the material pile by the scraper of the iron separator belt. This avoids the difficulty in screening out impurities with low iron content or small pieces because they are pressed down in the lower layer of the material pile. Attached Figure Description

[0016] Figure 1 This is a partial isometric schematic diagram of the iron removal system after the electrode paste raw material is crushed in the embodiment.

[0017] Figure 2 This is a partial structural diagram of the iron removal system after the electrode paste raw material is crushed, as shown in the embodiment.

[0018] Figure 3 This is a partial cross-sectional view AA of the iron removal system after the electrode paste raw material is crushed in the embodiment.

[0019] Figure 4 This is a partially enlarged view (B) of the iron removal system after the electrode paste raw material is crushed, as shown in the attached diagram. Figure 1 ).

[0020] In the figure: 10 iron removal machine body, 11 mounting frame, 111 auxiliary suspension frame, 112 hanging ring, 113 correction roller, 12 drive roller, 13 drive motor, 14 magnet, 15 iron removal belt, 151 scraper, 16 buffer assembly, 161 shock absorber, 162 follower roller, 20 bracket, 21 telescopic drive rod, 22 suspension component, 221 first connecting rod, 222 second connecting rod, 223 flexible cable, 224 lock, 30 material conveyor belt, and 31 material thickness sensor.

[0021] It should be noted that, in order to reduce the length of the accompanying drawings and to show more details of this application, the above-mentioned drawings... Figure 2 With appendix Figure 3 The text includes partial partitions, the purpose of which is to highlight the details of the local structure, rather than to represent the actual appearance of the structure, and does not adversely affect the understanding and description of other structural content in this application. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of this application will be further described below with reference to the accompanying drawings of the embodiments, and this application is not limited to the following specific implementation methods.

[0023] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," "rear," "top," and "bottom" indicate directions or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The present application will be further described in detail with reference to specific embodiments.

[0025] This application discloses a method for removing iron from electrode paste raw materials after crushing, including the following steps: Step 1: The material pile formed by the crushed material of the residual anode (electrode paste raw material) is transported by the material conveyor belt 30 and passes under the iron removal machine body 10. By controlling the feeding interval at the feeding end of the material conveyor belt 30, the adjacent spacing D of the material piles on the material conveyor belt 30 is not less than the magnetic field length L distributed along the transport direction of the material conveyor belt 30 in the iron removal machine body 10. Step 2: Along the transport direction of the material pile, obtain the thickness value of the material pile at the first position of the material conveyor belt 30. Based on this thickness value Adjust the height difference between the leading edge of the iron removal machine body 10 and the material pile. And 0≤ ≤H, where the first position is located before the coverage range of the magnetic field of the iron separator body 10 in the transport direction, and H represents the maximum distance that the magnetic field of the iron separator body 10 can cover in the height direction; Step 3: Along the movement path of the material pile, obtain the thickness of the material pile at the second position, the third position, ..., the nth position. , ... ,like < ,based on Adjust the height difference between the rear edge of the iron removal machine body 10 and the material pile. ,in, The second, third, ... nth positions are all located within the coverage area of ​​the magnetic field length L distributed along the transport direction of the material conveyor belt 30 on the iron removal machine body 10. Step 4: Repeat steps S2 to S3 to screen and remove iron from the continuously transported material pile using the iron removal machine body 10.

[0026] Specifically, in step one above, a jaw crusher (this is prior art, its structure is omitted in the attached figure) is used at the feeding end of the material conveyor belt 30 to crush the large residual anode that cannot be directly used as electrode paste raw material. When the jaw crusher is working, its moving jaw moves periodically back and forth relative to the fixed jaw. During its crushing stage, the moving jaw moves towards the fixed jaw to squeeze and crush the material. During this process, the discharge port size decreases, and only a very small amount of fine material may be discharged due to inertia or compression. During its discharge stage, the moving jaw moves back relative to the fixed jaw to make the discharge port larger. The material that meets the discharge particle size after being crushed in the crushing stage is discharged from the bottom of the crushing chamber under the action of gravity. Therefore, the discharge process of the jaw crusher is intermittent and discontinuous, resulting in material piles of varying heights when falling onto the material conveyor belt 30. For the iron separator body 10 with a fixed magnetic field strength, the varying thickness of the material piles can cause different attraction forces on the iron-containing impurities, leading to problems with their removal. Therefore, a gravity discharge valve can be installed at the discharge port of the jaw crusher to achieve batch discharge, ensuring regular discharge and maintaining a distance between the material piles on the material conveyor belt 30 that is not less than the distance between the iron separator body 10 and the material conveyor belt 30 along the transport direction. The purpose of distributing the magnetic field length is to ensure that the independent material piles pass through the magnetic field range of the iron separator body 10 and are fully screened by the attraction of the belt iron separator body 10. Compared with the continuous material piles being screened by the iron separator body 10 while simultaneously in the magnetic field, this avoids the continuous adsorption of fine iron-containing impurities by the magnet 14, which induces the "magnetic curtain effect" and reduces the iron removal efficiency. In addition, for the iron separator body 10 that uses electromagnets instead of permanent magnets as magnets 14, controlling the material piles to maintain an appropriate spacing as they pass through the magnetic field can reduce the severe heat generation caused by the electromagnets continuously adsorbing a large amount of iron-containing impurities.

[0027] In step two above, when any pile of material on the material conveyor belt 30 is transported to a first position before the magnetic field length coverage area of ​​the iron separator body 10, the height from the bottom of the iron separator body 10 to the material pile is adjusted based on the obtained thickness value of the material pile. This ensures that the height of the plane at the bottom leading edge of the iron separator body 10—that is, the front edge of the magnetic field length coverage area—from the material pile is between 0 and the maximum distance that the magnetic field of the iron separator body 10 can cover in the vertical direction. This height difference ensures that the highest point of the material pile can enter the magnetic field length coverage area from the bottom of the iron separator body 10, and also ensures that the magnetic field of the iron separator body 10... In terms of height, it can at least adsorb larger iron-containing impurities distributed on the surface of the material pile. Compared with the prior art of suspending the iron removal machine body 10 at a fixed height above the moving path of the material pile, the purpose of step two of this application is to adjust the height of the iron removal machine body 10 in real time by using the pre-obtained thickness of the material pile. This ensures that the bottom magnetic field of the iron removal machine body 10 is infinitely close to the material pile without contacting it, so as to give full play to the attraction effect of the magnetic field on the material pile of any thickness. It also effectively prevents the problem of the required material being mistakenly screened out when the thickness of the material pile is higher than the plane where the bottom of the iron removal machine body 10 is located.

[0028] Specifically, the maximum distance that the magnetic field of the iron removal machine body 10 can cover in the height direction in step two above is obtained through the following steps or formulas, and the magnetic field attenuation formula is: ,in, This indicates the magnetic field strength on the surface of the magnet. This represents the material's magnetic permeability (the residual anode permeability is approximately 1.2), from which we can deduce... ,in, This indicates the minimum strength of the effective magnetic field between the iron removal machine body 10 and the residual anode material.

[0029] In step three above, the thickness of the material pile is continuously measured at n positions along the moving path of the material pile within the coverage area of ​​the magnetic field length L. Based on each thickness, the height difference between the rear edge of the iron separator body 10 and the material pile is continuously adjusted. Alternatively, as the material pile moves forward, iron-containing impurities on its surface are gradually screened off by the iron separator body 10, causing the thickness of the material pile to gradually decrease. During this process, the position of the rear edge of the iron separator body 10 also decreases, causing the magnetic field center position of the iron separator body 10 to continuously decrease as the material thickness decreases. This gradually reduces the distance between the magnetic field center of the iron separator body 10 and the material pile. Because the magnetic field center of the iron separator body 10 is crucial for removing iron-containing impurities... Iron impurities have the strongest attraction, ensuring that the attraction of the iron removal machine body 10 to the fine iron-containing impurities buried in the lower layer of the material pile by materials of normal particle size gradually increases. As the material pile moves forward, the bottom of the iron removal machine body 10 is inclined relative to the material pile. The inclined magnetic field generates an inclined and vertical attraction to the iron-containing impurities. Its horizontal component enables the lower layer of iron-containing impurities to overcome part of the resistance of the material pressing down. This makes it easier for the small and medium-sized impurity blocks with less iron content that are pressed down by the material to be attracted by the magnet 14 and scraped away from the material pile by the scraper 151 of the iron removal belt 15. This avoids the difficulty in screening out impurities with less iron content or small pieces because they are pressed down in the lower layer of the material pile.

[0030] It should be noted that, in order to accurately detect the thickness of the material pile at each location, in one of the more effective embodiments, material thickness sensors 31 are respectively installed at the above n locations along the transport direction of the material conveyor belt 30, such as laser rangefinders (which measure the thickness of the material pile by detecting the distance from the sensor to the highest point of the material pile), ultrasonic sensors, etc.

[0031] Regarding the effect of step three above, this application discloses a comparative analysis of the iron removal efficiency of horizontal and inclined magnets during the movement of simulated materials, and the results are shown in the table below: (In the table: material pile transport speed 200mm / s, initial material pile thickness 200mm, average material particle size 30mm, iron content of impurities approximately 0.8%, standard magnetic field strength at the center of the magnet surface 10000 Gauss, vertical height difference between the center of the magnet and the initial material pile 100mm).

[0032]

[0033] As shown in the table above, the tilted magnet improves the screening efficiency of iron-containing impurities on both the surface and bottom layers of the material compared to the horizontal magnet. In particular, it significantly improves the screening efficiency and particle size range of iron-containing impurities on the bottom layer. Although the magnetic field strength distribution at the leading edge (i.e. the side closest to the material pile) of the tilted magnet is somewhat weakened compared to the horizontal magnet, indicating that the adsorption particle size range of iron-containing impurities on the surface of the material pile is somewhat reduced, the magnetic field strength at the trailing edge of the tilted magnet is significantly improved and it is closer to the bottom layer of the material pile. Therefore, it can improve the overall iron removal efficiency compared to the horizontal magnet, which confirms the effect of step three in the method of this application.

[0034] Through the above four steps, the method for removing iron from electrode paste raw materials after crushing disclosed in this application has the following beneficial effects: 1. By controlling the material pile to maintain a suitable distance through the magnetic field, it is possible to avoid the continuous adsorption of fine iron-containing impurities by the magnet 14, which would induce the "magnetic curtain effect" and reduce the iron removal efficiency. It can also alleviate the severe heat generation caused by the continuous adsorption of a large number of iron-containing impurities by the electromagnet. Second, by adjusting the height of the iron removal machine body 10 in real time based on the pre-obtained thickness of the material pile, the magnetic field can be fully utilized to attract materials of any thickness, and the problem of the required material being mistakenly screened out when the thickness of the material pile is higher than the bottom plane of the iron removal machine body 10 can be effectively prevented. Third, by continuously acquiring the thickness value of the material pile within the length range of the magnetic field, the height of the rear edge of the iron removal machine body 10 is adjusted in real time, so that the center position of the magnetic field of the iron removal machine body 10 decreases as the material thickness decreases. This ensures that the attraction of the iron removal machine body 10 to the fine iron-containing impurities buried by the normal particle size material in the lower layer of the material pile gradually increases. At the same time, the bottom of the iron removal machine body 10 is tilted relative to the material pile. The tilted magnetic field generates an attraction in the tilted and vertical directions for the iron-containing impurities. Its horizontal component enables the iron-containing impurities in the lower layer to overcome part of the resistance of the material pressing down. This makes it easier for the small and medium-sized impurity blocks with less iron content that are pressed down by the material in the lower layer to be attracted by the magnet 14 and scraped away from the material pile by the scraper 151 of the iron removal belt 15. This avoids the difficulty in screening out impurities with less iron content or small pieces because they are pressed down in the lower layer of the material pile.

[0035] Furthermore, step three above also includes, after the material pile passes through the area covered by the magnetic field length L distributed along the transport direction of the material conveyor belt 30 of the iron separator body 10, adjusting the front edge and rear edge of the iron separator body 10 to be at the same horizontal height within time T. Where M represents the distance between the first position and the leading edge of the iron removal machine body 10, and V represents the transport speed of the material conveyor belt 30.

[0036] Specifically, this third step ensures that the iron separator body 10 is restored to a horizontal state before a material pile following any material pile within the magnetic field range reaches the first position, facilitating subsequent adjustment of the suspension height of the iron separator body 10 based on the material pile thickness obtained at the first position; secondly, if a material pile re-enters the magnetic field range during its forward movement, its This indicates that the upper layer of the material pile is not covered with impurities containing enough iron to be adsorbed by the magnetic field, so the thickness of the material pile does not decrease significantly during the magnetic field process. Therefore, the iron removal machine body 10, which has returned to a horizontal state, can allow the material pile to pass through the iron removal machine body 10 after step two, thus avoiding the problem that the material pile entering the magnetic field later will be mistakenly screened out due to contact with the bottom of the iron removal machine body 10 caused by the downward tilt of the iron removal machine body 10.

[0037] In a preferred embodiment, to ensure that the height of the rear edge of the iron separator body 10 is not lower than that of the material pile as the thickness gradually decreases with the downward tilting process, the nth position used to measure the thickness of the material pile shall not exceed the length L of the magnetic field distributed along the transport direction of the material conveyor belt 30 of the iron separator body 10. When the material pile passes through the magnetic field of length L... After the thickness value is measured at the measurement point within the range, the rear edge of the iron separator body 10 is directly lowered to a position between a height difference greater than or equal to 0 and less than or equal to the maximum distance that the magnetic field of the iron separator body 10 can cover in the height direction, so that the material pile passes through the rear edge of the magnetic field length L. The material pile leaves the magnetic field range below the rear edge of the iron removal machine body 10 after passing through the magnetic field length L. During the process, as the trailing edge of the iron removal machine body 10 continues to decrease, the magnetic field effectively removes iron-containing impurities from the material pile, while also avoiding the use of too many sensors due to an excessively large measurement range, thus reducing investment costs.

[0038] Instead of implementing the steps of the above-mentioned method for removing iron after crushing electrode paste raw materials, this application also discloses an iron removal system for electrode paste raw materials. This system includes an iron removal machine body 10, a support 20, a material conveyor belt 30, and a controller. The support 20 is used to fix the iron removal machine body 10, suspending it above the material transport line after crushing the residual anode for screening and impurity removal. At least one pair of telescopic drive rods 21 are vertically arranged at the top of the support 20. The telescopic drive rods 21 are preferably electric push rods whose extension and retraction can be controlled by a preset program. The telescopic drive rods 21 are symmetrically distributed on both sides of the iron removal machine body 10 and are at least partially rotatably connected to the iron removal machine body 10. The material conveyor belt 30 passes through... The support 20 passes under the iron separator body 10. The material conveyor belt 30 is used to transport the material pile through the magnetic field coverage area of ​​the iron separator body 10 at intervals D. The telescopic drive rod 21 is used to adjust the angle of attack of the iron separator body 10 relative to the material movement direction. Material thickness sensors 31 are respectively set at the first position to the nth position along the transport direction on the side of the material conveyor belt 30. All material thickness sensors 31 are electrically connected to the controller and the telescopic drive rod 21. The processor is used to drive the iron separator body 10 to perform up and down lifting, rotation and other actions based on the material thickness signal obtained in real time by the material thickness sensors 31 at each position through the telescopic drive rods 21 on both sides of the iron separator body 10.

[0039] Specifically, the controller includes a storage device, a processor, and a computer program stored in the storage device and executable on the processor. The computer program includes a program for obtaining the material thickness according to the above steps, obtaining the height difference between the leading edge of the iron removal machine body 10 and the material pile based on the material thickness and a calculation formula, controlling the telescopic drive rod 21 to extend or retract to the corresponding length based on each height difference, and controlling the telescopic drive rod 21 to drive the iron removal machine body 10 to return to a horizontal state after the material pile passes through the magnetic field length coverage range. When the computer program is executed by the processor, it is used to implement the contents of any step in the above method for removing iron after crushing the electrode paste raw material, so as to achieve the purpose of the above method.

[0040] Based on the above embodiments, this application also provides further embodiments to improve the iron removal system after crushing the electrode paste raw materials.

[0041] In some preferred embodiments, the aforementioned iron removal machine body 10 includes a mounting frame 11, a plurality of drive rollers 12, and a drive motor 13. The mounting frame 11 is preferably a hollow rectangular frame, its internal space used to fix a magnet 14. The magnet 14 includes a permanent magnet or an electromagnet, its bottom surface being the adsorption surface closest to the material and being planar. The drive rollers 12 are preferably four in number, symmetrically distributed above and below the magnet 14 and rotatably connected to the mounting frame 11 via bearings. The fixed end of the drive motor 13 is located on one side of the mounting frame 11, and its output shaft establishes a transmission connection with one end of any one of the drive rollers 12 through a transmission mechanism such as a pulley, belt, gear, and chain, enabling the drive motor 13 to... The drive rollers 12 are driven to rotate. The outer sides of the four drive rollers 12 are fitted with iron removal belts 15, so that the iron removal belts 15 surround the magnet 14. The iron removal belts 15 are equipped with scrapers 151. A pair of telescopic drive rods 21 are symmetrically distributed on both sides of the mounting frame 11. Their upper ends are fixedly connected to the bracket 20 in the vertical direction, and their lower ends are rotatably connected to the left and right sides of the mounting frame 11 respectively through rotatable connecting parts such as rotating shafts, ball heads or bearings. The telescopic drive rods 21 on the left and right sides perform synchronous telescopic movements based on the controller command, or the right telescopic drive rod 21 is fixed and the left telescopic drive rod 21 performs up and down telescopic movements to adjust the height of the iron removal machine body 10 or to rotate the iron removal machine body 10 by a certain angle.

[0042] When using this system, based on the thickness of the material pile that is about to reach below the iron removal belt 15, the height of the mounting frame 11 relative to the material pile (i.e., step two) or the deflection angle (i.e., step three) is adjusted in advance by the aforementioned telescopic drive rod 21, so that the iron removal belt 15 approaches the material pile or forms a certain angle of attack with the material pile. When the material passes through the iron removal belt 15, the distance between the top of the material and the bottom surface of the magnet 14 gradually decreases. This makes the magnetic force of the magnet 14 on the iron-containing impurity blocks in the material pile gradient along the direction of material movement. As the impurities with higher iron content are screened out, the small and medium-sized impurity blocks with lower iron content pressed by the material in the lower layer are attracted by the magnet 14 due to the gradually increasing magnetic force and are scraped away from the material pile by the scraper 151 of the iron removal belt 15. Compared with the prior art, this improves the particle size uniformity of the residual anode fragments and reduces the content of small iron-containing impurities.

[0043] Furthermore, to ensure that the iron removal belt 15 maintains a safe distance from the top of the bracket 20 during operation and to avoid motion interference between the telescopic drive rod 21 and the iron removal belt 15, the top of the aforementioned mounting frame 11 is fixedly connected to an auxiliary suspension frame 111 by four uprights, providing an independent operating space for the iron removal belt 15 below. The aforementioned bracket 20 is composed of two symmetrically arranged portal frame-shaped frames, with their tops connected by a crossbar. The two ends of the telescopic drive rod 21 are respectively connected to the crossbar and the auxiliary suspension frame 111, thereby avoiding motion interference between the telescopic drive rod 21 and the iron removal belt 15 and improving the transmission efficiency of the telescopic drive rod 21.

[0044] Furthermore, to improve the safety of the iron separator body 10, the iron separator body 10 also includes a suspension component 22. Specifically, the suspension component 22 includes connecting components such as cables and chains that enable a flexible connection between the bracket 20 and the mounting frame 11. The suspension components 22 are symmetrically distributed on both sides of the mounting frame 11, and both ends of the suspension components 22 are detachably connected to the auxiliary suspension frame 111 on the mounting frame 11 and the top of the bracket 20 respectively through snap-fit ​​connections. After the iron separator body 10 and the bracket 20 are flexibly connected, when the iron separator body 10 is under maintenance or shut down, the suspension component 22 bears the weight of the iron separator body 10, reducing the load on the telescopic drive rod 21 and extending its service life.

[0045] In one embodiment, the suspension member 22 includes a first connecting rod 221 and a second connecting rod 222. One end of the first connecting rod 221 and the second connecting rod 222 are screwed together for helical telescopic engagement, and the other end is provided with a flexible cable 223, such as a steel cable. One end of the flexible cable 223 is provided with a buckle 224. The bracket 20 and the mounting frame 11 are provided with hanging rings 112, which are used to snap together with the buckles 224. By rotating the first connecting rod 221 and the second connecting rod 222 to increase or decrease the distance between the iron removal machine body 10 and the bracket 20, the height difference between the iron removal machine body 10 and the material pile can be finely controlled beyond the deflection angle adjustable by the telescopic drive rod 21. This avoids the magnet 14 being too high above the material, resulting in insufficient attraction for iron-containing impurities, or avoids the iron removal belt 15 being too low, causing the scraper 151 to directly contact the residual anode material pile, resulting in screening failure. In addition, in this embodiment, along the material transport direction, the length of the suspension member 22 on the front side of the mounting frame 11 is shorter than the length of the suspension member 22 on the rear side of the mounting frame 11, so that the belt-type iron remover body can maintain a certain tilt angle without being actively adjusted by the telescopic drive rod 171, so as to actively form a magnetic field that is tilted to the material transport direction.

[0046] Furthermore, since the iron removal belt 15 removes iron in an inclined state, in order to prevent the iron removal belt 15 from deviating due to wear or changes in the speed of the drive motor 13 during operation, a number of correction rollers 113 are provided on one side of the mounting frame 11. The correction rollers 113 are distributed at the same end of the drive roller 12 and their axial direction is perpendicular to the iron removal belt 15. The side of the iron removal belt 15 is in rolling contact with the correction rollers 113.

[0047] When using the above system, the side of the mounting frame 11 with the correction roller 113 is positioned away from the material. Since the side of the mounting frame 11 that receives the material needs to be tilted upward, the iron removal belt 15 tends to deviate downward along the axis of the drive roller 12. The correction roller 113 can roll with the iron removal belt 15 during its rotation, preventing the iron removal belt 15 from shifting downward. This ensures that the iron removal belt 15 removes iron-containing impurities in a fixed direction and range, and also ensures the safety of the iron removal machine body 10 during production.

[0048] When using the above system, during the process of magnet 14 adsorbing iron-containing impurities, high-quality impurities will impact the iron removal belt 15 and cause the inner side of the iron removal belt 15 to approach or contact the bottom of magnet 14. Since the iron removal belt 15 is running at high speed, this impact may cause accelerated wear of the iron removal belt 15 or damage to magnet 14. To solve a series of problems caused by this phenomenon, a buffer assembly 16 is provided between magnet 14 and iron removal belt 15. Several pairs of buffer assemblies 16 are distributed between a pair of drive rollers 12 located below magnet 14, and the inner side of iron removal belt 15 is in at least partial rolling contact with the buffer assembly 16. Specifically, the aforementioned buffer assembly 16 includes a pair of shock absorbers 161 and a follower roller 162. The shock absorbers 161 are distributed at both ends of the drive roller 12 and are provided with collars at both ends. A rotating shaft is provided on the side of the mounting frame 11. The collar at one end of the shock absorber 161 is rotatably connected to the rotating shaft through a bearing, and the collar at the other end is rotatably engaged with both ends of the follower roller 162 through a bearing. Under the rebound action of the shock absorber 161, the inner side of the iron removal belt 15 is always in rolling contact with the follower roller 162.

[0049] When the magnet 14 adsorbs impurity blocks with high iron content, the impact of the impurity blocks on the iron removal belt 15 can be offset by the compression of the shock absorber 161. The rebound of the shock absorber 161 allows the iron removal belt 15 to continuously screen out iron-containing impurities, ensuring that the inner side of the iron removal belt 15 and the magnet 14 always maintain a safe gap, reducing the wear of the magnet 14 or the iron removal belt 15 caused by the impact, and helping to improve the iron removal efficiency.

[0050] Obviously, the above embodiments of this application are merely examples for clearly illustrating this application, and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for removing iron from a crushed raw material for an electrode paste, characterized by, Includes the following steps: S1. Based on the material conveyor belt transporting the material piles passing under the iron removal machine body, control the adjacent spacing D of the material piles on the material conveyor belt to be no less than the magnetic field length L distributed along the transport direction of the material conveyor belt of the iron removal machine body; S2. Obtain the thickness of the material pile at the first position. ,based on Adjust the height difference between the leading edge of the iron removal machine body and the material pile And 0≤ ≤H, where the first position is located before the coverage range of the magnetic field of the iron separator body in the transport direction, and H represents the maximum distance that the magnetic field of the iron separator body can cover in the height direction; S3. Along the movement path of the material pile, obtain the thickness of the material pile at the second position, the third position, ..., the nth position. , ... ,like < ,based on Adjust the height difference between the rear edge of the iron remover body and the material pile. ,in, The second, third, ... nth positions are all located within the coverage area of ​​the magnetic field length L distributed along the material conveyor belt transport direction of the iron removal machine body; S4. Repeat steps S2 to S3.

2. The method of removing iron from crushed electrode paste ingredients according to claim 1, wherein Step S3 further includes adjusting the front and rear edges of the iron separator body to the same horizontal height within time T after the material pile has passed through the range of the magnetic field length L distributed along the material conveyor belt of the iron separator body. Where M represents the distance between the first position and the leading edge of the iron removal machine body, and V represents the transport speed of the material conveyor belt.

3. The method of removing iron from crushed electrode paste ingredients according to claim 1, wherein The n position is not more than the front of the magnetic field length L distributed along the material conveying belt transport direction of the tramp iron remover body .

4. A system for removing iron from crushed electrode paste raw material, applied to the method for removing iron from crushed electrode paste raw material according to any one of claims 1 to 3, characterized by, The device includes an iron removal machine body, a support frame, a material conveyor belt, and a controller. At least one pair of telescopic drive rods are symmetrically arranged at the top of the support frame along the vertical direction, and the bottom ends of each telescopic drive rod are rotatably connected to the iron removal machine body. The material conveyor belt passes through the support frame and is located below the iron removal machine body. Several material thickness sensors are arranged along the conveying direction of the material conveyor belt, and each material thickness sensor is electrically connected to the controller and the telescopic drive rods. The controller includes a storage device, a processor, and a computer program stored in the storage device and executable on the processor. When executed by the processor, the computer program implements the steps of the iron removal method after crushing electrode paste raw materials as described in any one of claims 1 to 3.

5. The electrode paste raw material iron removal system after crushing according to claim 4, characterized by, The iron removal machine body includes a mounting frame, several drive rollers, and a drive motor. The telescopic drive rods are symmetrically distributed on both sides of the mounting frame and are rotatably connected to the mounting frame. A magnet is provided inside the mounting frame. The bottom of the magnet is flat. Several drive rollers are symmetrically distributed above and below the magnet and are rotatably connected to the mounting frame. The drive motor is located on one side of the mounting frame, and its output end is connected to any of the drive rollers. An iron removal belt is provided around the drive roller.

6. The electrode paste raw material iron removal system after crushing according to claim 5, characterized by, Several hanging members are symmetrically distributed on both sides of the mounting frame, and the two ends of the hanging members are respectively connected to the mounting frame and the bracket by snap-fit.

7. The iron removal system after crushing electrode paste raw materials as described in claim 6, characterized in that, The suspension component includes a first connecting rod and a second connecting rod. One end of the first connecting rod and the second connecting rod is provided with a flexible cable. One end of the flexible cable is connected to a buckle. The ends of the first connecting rod and the second connecting rod away from the flexible cable are rotated and telescopically engaged by threads. The bracket and the mounting frame are provided with hanging rings on opposite sides. The buckle is engaged with the hanging ring.

8. The electrode paste raw material iron removal system after crushing according to claim 5, characterized by, A plurality of correction rollers are rotatably provided on one side of the mounting frame. The correction rollers are distributed at one end of the drive roller and their axial direction is perpendicular to the iron removal belt. The side of the iron removal belt is in rolling contact with the correction rollers.

9. The electrode paste raw material iron removal system after crushing according to claim 5, characterized by, A buffer assembly is provided between the bottom of the magnet and the iron removal belt. There are several pairs of buffer assemblies, and the several pairs of buffer assemblies are symmetrically distributed between a pair of drive rollers. The iron removal belt is in at least partial rolling contact with the buffer assembly.

10. The electrode paste raw material iron removal system after crushing according to claim 9, characterized by, The buffer assembly includes a pair of shock-absorbing cylinders and a follower roller. The pair of shock-absorbing cylinders are symmetrically distributed at both ends of the drive roller and one end of the cylinder is rotatably connected to the mounting frame. The two ends of the follower roller are respectively in rolling engagement with the pair of shock-absorbing cylinders, and the inner side of the iron removal belt is in rolling contact with the follower roller.

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