Method and system for removing iron after electrode paste raw material crushing

Abstract

The invention relates to a method and a system for removing iron after crushing of electrode paste raw materials, anode scraps are conveyed to pass below an iron removing machine body at fixed intervals based on a material conveying belt, and the magnetic curtain effect is reduced; the height difference between the front edge of the deironing machine body and the material pile is adjusted based on the thickness value before the material pile enters the magnetic field range of the deironing machine body, the attraction effect of the magnetic field on the material pile with any thickness is fully exerted, and the situation that needed materials are mistakenly screened out when the thickness of the material pile is larger than the plane where the bottom of the deironing machine body is located is effectively avoided. Gradually reduced thickness values of the material pile are sequentially obtained along the moving path of the material pile, and the height difference between the rear edge of the iron removal machine body and the material pile is adjusted based on the multiple thickness values, so that the gravitation of the iron removal machine body to fine iron-containing impurities buried by materials with normal particle sizes on the lower layer of the material pile is increased step by step; and the gradient magnetic field generates horizontal component force on the iron-containing impurities, so that partial resistance of downward pressing of the materials is overcome, and the screening rate of small and medium-sized iron-containing impurity blocks pressed by the materials is improved.

Description

Technical Field

[0001] The present application belongs to the field of electrode paste production technology, and in particular relates to a method and system for removing iron from electrode paste raw materials after crushing. Background Art

[0002] As a raw material for electrode paste production, scrap anodes, thanks to their high alumina content and low price, help reduce electrode paste production costs and losses. Crushing scrap anodes to remove impurities produces uniformly sized particles, which helps improve the purity and uniformity of the electrode paste. However, the quality of recycled scrap anodes varies widely, and even after primary crushing, they still contain a high level of iron impurities, which not only increases crusher wear but also reduces the uniformity of the electrode paste raw material.

[0003] In the prior art, a conveyor belt is usually set up to transport the crushed particles after the crusher is crushed, and a belt-type iron remover is set up above the conveyor belt for iron removal. When in use, the belt of the belt-type iron remover is parallel to the conveyor belt, and the uniform magnetic field created by the magnet is used to adsorb impurity blocks with higher iron content, and the adsorbed impurities are selected through the belt. In order to ensure the passing efficiency of the material, the belt iron remover needs to maintain a certain distance from the conveyor belt within the range of its magnetic field. However, due to the different heights of the material piled on the conveyor belt, and the material is affected by the crushing and unloading process of the jaw crusher, the particle size of the accumulated material tends to gradually decrease from top to bottom, resulting in the following problem when the belt iron remover is set parallel to the conveyor belt: because a part of the small iron impurities located in the lower layer of the material pile are affected by the pressure of the material above them, and are also at the edge of the adsorption range of the upper magnet, the belt iron remover is much better at removing large iron impurities in the upper layer than small iron impurities, resulting in poor uniformity of the electrode paste raw materials. Summary of the Invention

[0004] Based on the above-mentioned background technical needs, the present application provides a method for removing iron from electrode paste raw materials after crushing, which is used to solve the natural phenomenon in the prior art that the material stacking heights on the conveyor belt are different, and the material is affected by the particle size, resulting in small pieces stacking at the bottom and large pieces stacking at the top, resulting in the belt iron remover being much better 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, thereby resulting in poor uniformity of the electrode paste raw materials.

[0005] To achieve the above objectives, the technical solution of this application is: A method for removing iron from electrode paste raw materials after crushing, comprising the following steps: S1. Based on the material conveyor belt transporting the material pile passing from below the iron removing machine body, the adjacent spacing D of the material pile on the material conveyor belt is controlled to be not less than the magnetic field length L distributed along the direction of transportation of the material conveyor belt in the iron removing machine body; S2. Obtain the thickness of the material pile at the first position ,based on Adjust the height difference between the front edge of the iron remover body and the material pile , 0≤ ≤ , wherein, wherein, the first position is located before the coverage range of the magnetic field of the iron remover body in the transport direction, and H represents the maximum distance that the magnetic field of the iron remover body can cover in the height direction; S3. Obtain the thickness of the material pile at the second position, the third position, and the nth position along the moving path of the material pile. 、 … ,like < ,based on Adjust the height difference between the rear edge of the iron remover body and the material pile ,in, The second position, the third position ... the nth position are all located within the coverage range of the magnetic field length L distributed along the transport direction of the material conveyor belt of the iron remover body; S4. Repeat steps S2 to S3.

[0006] Preferably, the step S3 further comprises adjusting the front edge and the rear edge of the iron remover body to the same level within a time T after the material pile passes through the range of the magnetic field length L distributed along the transport direction of the material conveyor belt of the iron remover body. , where M represents the distance between the first position and the front edge of the iron remover body, and V represents the transport speed of the material conveyor belt.

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

[0008] In order to implement the above-mentioned method for removing iron from the electrode paste raw materials after crushing, the present application also discloses a system for removing iron from the electrode paste raw materials after crushing, including a de-ironing machine body, a bracket, a material conveyor belt and a controller. The top of the bracket is symmetrically provided with at least one pair of telescopic drive rods in the vertical direction, and the bottom ends of the telescopic drive rods are rotatably connected to the de-ironing machine body; the material conveyor belt passes through the bracket and is located below the de-ironing machine body, and the material conveyor belt is provided with a number of material thickness sensors along its conveying direction, and the material thickness sensors are electrically connected to the controller and the telescopic drive rods. The controller includes a storage, a processor and a computer program stored in the storage and runnable on the processor. When the computer program is executed by the processor, the steps of the method for removing iron from the electrode paste raw materials after crushing are implemented as described in any one of claims 1 to 3.

[0009] Preferably, the iron remover 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 matched with the mounting frame; a magnet is provided in the mounting frame, the bottom of the magnet is flat, a plurality of drive rollers are symmetrically distributed above and below the magnet and are rotatably connected to the mounting frame, the drive motor is provided on one side of the mounting frame, and its output end is transmission-connected to any of the drive rollers, and the outer cover of the drive roller is provided with an iron removal belt.

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

[0011] Preferably, the suspension member includes a first connecting rod and a second connecting rod, one end of the first connecting rod and the second connecting rod are each provided with a flexible rope, one end of the flexible rope is connected to a lock buckle, the first connecting rod and the second connecting rod are connected to the end away from the flexible rope by a thread to achieve rotational telescopic cooperation, the bracket and the opposite side of the mounting frame are each provided with a hanging ring, and the lock buckle is buckled with the hanging ring.

[0012] Preferably, a plurality of correcting rollers are rotatably provided on one side of the mounting frame. The correcting rollers are distributed at one end of the driving roller and their axes are perpendicular to the iron removal belt. The side edges of the iron removal belt are in rolling contact with the correcting 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 the buffer assemblies, and the several pairs of the buffer assemblies are symmetrically distributed between a pair of the driving rollers, and the iron removal belt is in rolling contact with at least part of 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 driving roller and one end thereof is rotatably connected to the mounting frame. The two ends of the follower roller are respectively rollingly matched 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 existing technology, this application has at least the following beneficial effects: 1. Control the material pile to maintain an appropriate distance when passing through the magnetic field, which can prevent the magnet from continuously adsorbing fine iron-containing impurities and inducing the "magnetic curtain effect" that reduces the iron removal efficiency, and can also reduce the serious heating phenomenon caused by the electromagnet continuously adsorbing a large amount of iron-containing impurities; Second, the height of the iron remover body is adjusted in real time based on the thickness of the material pile obtained in advance, giving full play to the magnetic field's attraction to material piles of any thickness, and effectively preventing the problem of the required material being mistakenly screened out when the material pile thickness is higher than the plane where the bottom of the iron remover body is located; 3. By continuously obtaining the thickness value of the material pile within the length range of the magnetic field, the height of the rear edge position of the iron remover body is adjusted in real time, so that the center position of the magnetic field of the iron remover body is always lowered as the material thickness decreases, ensuring that the iron remover body's attraction to the fine iron-containing impurities buried by materials of normal particle size in the lower layer of the material pile gradually increases. At the same time, the bottom of the iron remover body is tilted relative to the material pile. The inclined magnetic field produces an inclined and vertical attraction on 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 to the downward pressure, making the small and medium-sized impurity blocks with less iron content pressed by the material in the lower layer easier to be adsorbed by the magnet and scraped away from the material pile by the scraper of the iron remover belt, thereby avoiding impurities with less iron content or small pieces being pressed in the lower layer of the material pile and difficult to be screened out. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 Schematic diagram of the partial structure of the iron removal system after the electrode paste raw materials are crushed 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 partial enlarged view B of the iron removal system after the electrode paste raw material is crushed in the embodiment (taken from the attached Figure 1 ).

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

[0021] It should be noted that in order to reduce the length of the drawings and to show more details of the present application, the above-mentioned drawings are Figure 2 With attached Figure 3 Partial partitioning is performed in the figure, the purpose of which is to highlight the details of the local structure rather than the actual appearance of the structure, and it does not adversely affect the understanding and description of other structural contents in this application. DETAILED DESCRIPTION

[0022] It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following will further describe the technical solution of this application in conjunction with the drawings of the embodiments of this application, 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 drawings of the embodiments correspond to the same or similar components. In the description of this application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "back", "top", "bottom", etc. indicating directions or positional relationships, they are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0024] The following is combined with Figure 1 To the attached Figure 4 The present application is further described in detail with reference to specific embodiments.

[0025] The present application discloses a method for removing iron from electrode paste raw materials after crushing, comprising the following steps: Step 1: The material pile formed by crushing the scrap anode (electrode paste raw material) is transported by the material conveyor belt 30 and passes under the iron remover body 10. By controlling the feeding interval at the feeding end of the material conveyor belt 30, the adjacent distance D of the material pile on the material conveyor belt 30 is not less than the magnetic field length L distributed along the transportation direction of the material conveyor belt 30; Step 2: Acquire the thickness value of the material pile at the first position of the material conveyor belt 30 along the transport direction of the material pile , based on the thickness value Adjust the height difference between the front edge of the iron remover body 10 and the material pile , and 0≤ ≤H, wherein the first position is located before the coverage range of the magnetic field of the iron remover body 10 in the transport direction, and H represents the maximum distance that the magnetic field of the iron remover body 10 can cover in the height direction; Step 3: Obtain the thickness of the material pile at the second position, the third position, and the nth position along the moving path of the material pile. 、 … ,like < ,based on Adjust the height difference between the rear edge of the iron remover body 10 and the material pile ,in, The second position, the third position ... the nth position are all located within the coverage of the magnetic field length L distributed along the transport direction of the material conveyor belt 30 of the iron remover body 10; Step 4: Repeat steps S2 to S3 to allow the iron remover body 10 to screen and remove iron from the continuously transported material pile.

[0026] Specifically, in the above step one, a jaw crusher (this is the prior art, and its structure is omitted in the attached drawings) is used at the feeding end of the material conveyor belt 30 to crush the residual anodes that are large in size and cannot be directly used as electrode paste raw materials. When the jaw crusher is working, its movable jaw performs periodic reciprocating motion relative to the fixed jaw. During its crushing stage, the movable jaw moves toward the fixed jaw to squeeze and crush the material. During this process, the size of the discharge port is reduced, and only a very small amount of fine materials may be discharged due to inertia or extrusion. During its discharge stage, the movable jaw retreats relative to the fixed jaw to enlarge the discharge port. The materials that meet the discharge particle size after being crushed in the crushing stage are discharged from the bottom of the crushing chamber under the action of gravity. It can be seen from this that the discharging process of the jaw crusher is intermittent and discontinuous, resulting in the formation of material piles of varying heights when the material falls onto the material conveyor belt 30. For the iron remover body 10 with a certain magnetic field strength, it is easy for the iron-containing impurities mixed therein to not be screened out due to the different thicknesses of the material piles, resulting in different gravitational forces on the impurities. Therefore, a gravity discharge valve can be set at the discharge port of the jaw crusher to achieve the effect of batch unloading, so as to achieve regular discharge and make the spacing between the material piles on the material conveyor belt 30 not less than the distance between the iron remover body 10 and the material conveyor belt 30 in the transport direction. The purpose of this step is to make the independent material pile pass through the magnetic field range of the iron remover body 10 and be fully screened by the gravity of the belt iron remover body 10. Compared with the continuous material pile being in the magnetic field and screened by the iron remover body 10 at the same time, it can avoid the magnet 14 continuously adsorbing fine iron-containing impurities to induce the "magnetic curtain effect" and reduce the iron removal efficiency; in addition, for the iron remover body 10 that uses electromagnets instead of permanent magnets as magnets 14, controlling the material pile to maintain a suitable spacing through the magnetic field can reduce the serious heating phenomenon caused by the electromagnet continuously adsorbing a large amount of iron-containing impurities.

[0027] In the above step 2, when any pile of materials on the material conveyor belt 30 is transported to the first position before the coverage range of the magnetic field length of the iron remover body 10, the height from the bottom of the iron remover body 10 to the material pile is adjusted based on the obtained thickness value of the material pile, so that the bottom front edge of the iron remover body 10 - that is, the plane where the forefront of the magnetic field length coverage range is located is at a height between 0 and the maximum distance that the magnetic field of the iron remover body 10 can cover in the height direction. This height difference can ensure that the highest point of the material pile can enter the range covered by its magnetic field length from the bottom of the iron remover body 10, and can ensure that the magnetic field of the iron remover body 10 is within In the height direction, 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 remover 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 remover body 10 in real time according to the thickness of the material pile obtained in advance, and ensure that the bottom magnetic field of the iron remover body 10 is infinitely close to the material pile while ensuring that the material pile does not contact the iron remover body 10, so as to give full play to the attraction of the magnetic field on the material pile of any thickness, and effectively prevent 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 remover body 10 is located.

[0028] Specifically, the maximum distance that the magnetic field of the iron remover body 10 can cover in the height direction in the above step 2 is obtained by the following steps or formulas. The magnetic field attenuation formula is: ,in, represents the magnetic field strength on the surface of the magnet, Indicates the magnetic permeability of the material (the residual anode magnetic permeability is about 1.2), from which it can be deduced ,in, It indicates the minimum intensity of the effective magnetic field of the iron remover body 10 on the residual anode material.

[0029] In the above step three, the thickness of the material pile is continuously obtained at n positions along the moving path of the material pile within the coverage range of the magnetic field length L, and the height difference between the rear edge of the iron remover body 10 and the material pile is continuously adjusted based on each thickness, or the iron-containing impurities on the surface of the material pile are gradually screened out by the iron remover body 10 during the forward movement, so that the thickness of the material pile gradually decreases. In this process, the rear edge position of the iron remover body 10 is also lowered, so that the center position of the magnetic field of the iron remover body 10 is always lowered as the material thickness decreases, thereby gradually reducing the distance between the center of the magnetic field of the iron remover body 10 and the material pile. The attraction of iron impurities is the strongest, ensuring that the attraction of the iron remover body 10 to the fine iron-containing impurities buried by materials of normal particle size in the lower layer of the material pile gradually increases, and when the material pile moves forward, the bottom of the iron remover body 10 is tilted relative to the material pile, and the inclined magnetic field produces an inclined and vertical attraction on 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, so that the small and medium-sized impurity blocks with less iron content pressed by the material in the lower layer are more easily adsorbed by the magnet 14 and scraped away from the material pile by the scraper 151 of the iron removal belt 15, thereby avoiding the impurities with less iron content or small pieces being pressed in the lower layer of the material pile and difficult to be screened out.

[0030] It should be noted that in order to accurately detect the thickness of the material pile at each position, in one of the better implementation methods, material thickness sensors 31 are respectively set at the above-mentioned n positions along the transportation direction of the material conveyor belt 30, such as laser ranging sensors (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 a horizontal magnet and an inclined magnet during a simulated material movement process. The results are shown in the following table: (In the table: the material pile transport speed is 200 mm / s, the initial thickness of the material pile is 200 mm, the average particle size of the material is 30 mm, the impurity iron content is about 0.8%, the standard magnetic field strength at the center of the magnet surface is 10,000 Gauss, and the vertical height difference between the center of the magnet and the initial material pile is 100 mm).

[0032] parameter Horizontal magnet 10° tilt magnet 20° tilt magnet Efficiency variation range Screening rate of surface iron impurities 91.2％ 93.3％ 94.1％ ＋2.1％～2.9％ Screening rate of iron impurities in the bottom layer 64.5％ 78.2％ 85.3％ ＋13.7％～20.8％ Surface critical adsorption particle size 38mm 39mm 41mm ＋2.6％～7.9％ Bottom layer close to adsorption particle size 22mm 20mm 17mm -9.1％～22.7％ Magnetic field intensity distribution of the magnet relative to the material at the maximum height difference — Leading edge: 9150 Gauss Trailing edge: 10430 Gauss Leading edge: 8840 Gauss Trailing edge: 11500 Gauss — It can be seen from the above table that the inclined magnet has improved screening efficiency for iron-containing impurities on the surface and bottom layers of the material compared to the horizontal magnet, especially the screening efficiency and particle size screening range of iron-containing impurities in the bottom layer are significantly improved. Although the magnetic field intensity distribution at the leading edge (i.e., the side that first approaches the material pile) of the inclined magnet is somewhat weakened compared to the horizontal magnet, indicating that the range of particle size of the adsorbed iron-containing impurities on the surface of the material pile is somewhat reduced, the magnetic field intensity at the trailing edge of the tilted magnet is significantly improved and is closer to the bottom layer of the material pile, and therefore the overall iron removal efficiency can be improved compared to the horizontal magnet, confirming the effect of step three in the method of the present application.

[0033] Through the above four steps, the method for removing iron from the electrode paste raw material after crushing disclosed in this application has the following beneficial effects: 1. Controlling the material pile to maintain an appropriate distance through the magnetic field can prevent the magnet 14 from continuously adsorbing fine iron-containing impurities, inducing a "magnetic curtain effect" that reduces the iron removal efficiency, and can also reduce the serious heating phenomenon caused by the electromagnet continuously adsorbing a large amount of iron-containing impurities; Second, the height of the iron remover body 10 is adjusted in real time by the thickness of the material pile obtained in advance, giving full play to the attraction of the magnetic field to the material pile of any thickness, and effectively preventing the problem of the required material being mistakenly screened out when the material pile thickness is higher than the plane where the bottom of the iron remover body 10 is located; 3. By continuously obtaining the thickness value of the material pile within the length range of the magnetic field, the height of the rear edge position of the iron remover body 10 is adjusted in real time, so that the center position of the magnetic field of the iron remover body 10 is constantly lowered as the material thickness decreases, ensuring that the iron remover body 10 gradually increases its attractive force on the fine iron-containing impurities buried by materials of normal particle size in the lower layer of the material pile. At the same time, the bottom of the iron remover body 10 is tilted relative to the material pile, and the inclined magnetic field produces an inclined and vertical attractive force on the iron-containing impurities. The horizontal component of the force enables the iron-containing impurities in the lower layer to overcome part of the resistance of the material to the downward pressure, so that the small and medium-sized impurity blocks with less iron content pressed by the material in the lower layer are more easily adsorbed by the magnet 14 and scraped away from the material pile by the scraper 151 of the iron removal belt 15, thereby avoiding impurities with less iron content or small pieces being pressed in the lower layer of the material pile and difficult to be screened out.

[0034] Furthermore, the above step three also includes, when the material pile passes through the range covered by the magnetic field length L distributed along the transport direction of the material conveyor belt 30 of the iron remover body 10, adjusting the front edge and the rear edge of the iron remover body 10 to the same horizontal height within the time T, the time , where M represents the distance between the first position and the front edge of the iron remover body 10 , and V represents the transport speed of the material conveyor belt 30 .

[0035] Specifically, the implementation process of step three can ensure that the iron remover body 10 is restored to a horizontal state before a material pile located after any material pile passing through the magnetic field range reaches the first position, so as to facilitate the subsequent adjustment of the suspension height of the iron remover body 10 based on the thickness of the material pile obtained at the first position; secondly, when the material pile that enters the magnetic field range again is in the process of moving forward, = , at least it shows that the upper layer of the material pile is not covered with impurity blocks with an iron content sufficient to be adsorbed by the magnetic field, resulting in the thickness of the material pile not being significantly reduced during the process of passing through the magnetic field. The iron remover body 10, which has returned to a horizontal state, can allow the material pile to pass through the iron remover body 10 after executing step 2, thereby avoiding the problem that the material pile that subsequently enters the magnetic field contacts the bottom of the iron remover body 10 due to the downward tilt of the iron remover body 10, resulting in the required material being mistakenly screened out.

[0036] In a preferred embodiment, in order to ensure that the rear edge of the iron remover body 10 is prevented from being lower than the material pile during the downward tilt of the material pile with gradually decreasing thickness, the nth position for measuring the thickness of the material pile does not exceed the front of the magnetic field length L distributed along the transport direction of the material conveyor belt 30 of the iron remover body 10. When the material pile passes through the magnetic field length L After the thickness value of the measuring point in the range is measured, the rear edge of the iron remover body 10 is directly lowered to a position where the height difference is greater than or equal to 0 and less than or equal to the maximum distance that the magnetic field of the iron remover body 10 can cover in the height direction based on the measured value, so that the material pile passes through the rear edge of the magnetic field length L. After the range of the magnetic field, the material leaves the magnetic field range below the trailing edge of the iron remover body 10, and the material piles up after passing the magnetic field length L. During the range, since the rear edge of the iron remover body 10 continues to descend, it ensures that the magnetic field can fully remove the iron impurities in the material pile, and avoids the use of too many sensors in the measurement position range being too large, thereby reducing investment costs.

[0037] The steps of the above-mentioned method for removing iron after crushing the electrode paste raw materials are not implemented. The present application also discloses a system for removing iron after crushing the electrode paste raw materials, which includes a de-ironing machine body 10, a bracket 20, a material conveyor belt 30 and a controller, wherein the bracket 20 is used to fix the de-ironing machine body 10 so that it is suspended above the material transportation line after the residual anode is crushed to screen and remove impurities from the material. At least one pair of telescopic drive rods 21 are provided at the top of the bracket 20 in the vertical direction. The telescopic drive rods 21 are preferably electric push rods whose telescopic amount can be controlled by a preset program. The telescopic drive rods 21 are symmetrically distributed on both sides of the de-ironing machine body 10 and are rotatably connected to at least part of the de-ironing machine body 10. The material conveyor belt 30 passes through The bracket 20 passes under the iron remover body 10, and the material conveyor belt 30 is used to transport the material pile at a distance D through the magnetic field coverage range of the iron remover body 10. The telescopic drive rod 21 is used to adjust the angle of attack of the iron remover body 10 relative to the material moving direction; the side of the material conveyor belt 30 is provided with material thickness sensors 31 at the above-mentioned first position to the nth position along its transportation direction, and 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 remover body 10 to perform up and down lifting, rotation, and other actions through the telescopic drive rods 21 on both sides of the iron remover body 10 based on the material thickness signal obtained in real time by the material thickness sensor 31 at each position.

[0038] Specifically, the above-mentioned controller includes a storage, a processor, and a computer program stored in the above-mentioned storage and capable of running on the above-mentioned processor. The computer program includes a program for obtaining the material thickness according to the above-mentioned steps, obtaining the height difference between the front edge of the iron remover body 10 and the material pile based on the material thickness and the calculation formula, controlling the telescopic drive rod 21 to extend and retract the corresponding length based on each height difference value, and controlling the telescopic drive rod 21 to drive the iron remover body 10 to restore to a horizontal state after the material pile passes through the magnetic field length coverage range. When the above-mentioned computer program is executed by the above-mentioned processor, it is used to implement the content of any step in the above-mentioned method for removing iron after crushing the electrode paste raw materials, so as to achieve the purpose of the above-mentioned method.

[0039] On the basis of the above-mentioned implementation manner, the present application also provides further embodiments to improve the above-mentioned iron removal system after crushing the electrode paste raw materials.

[0040] In some preferred embodiments, the above-mentioned iron remover 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, and its internal space is used to fix the magnet 14. The magnet 14 includes a permanent magnet or an electromagnet, and its bottom surface is the adsorption surface closest to the material and is flat. There are preferably four drive rollers 12, and the four drive rollers 12 are symmetrically distributed above and below the magnet 14 and are rotatably connected to the mounting frame 11 through bearings. The fixed end of the drive motor 13 is arranged on one side of the mounting frame 11, and its output shaft establishes a transmission match with one end of any one of the above-mentioned drive rollers 12 through a transmission mechanism such as a pulley and a belt, a gear and a chain, so that the drive motor 13 can The driving rollers 12 are driven to rotate, and an iron removal belt 15 is provided on the outer side of the four driving rollers 12, so that the iron removal belt 15 surrounds the magnet 14, and a scraper 151 is provided on the iron removal belt 15; a pair of telescopic driving rods 21 are symmetrically distributed on both sides of the mounting frame 11, and the upper ends thereof are fixedly connected to the bracket 20 in the vertical direction, and the lower ends are rotatably connected to the left and right sides of the mounting frame 11 through rotatable connecting parts such as rotating shafts, ball heads or bearings. The telescopic driving rods 21 on the left and right sides are respectively telescopically actuated based on the controller instructions, or the right telescopic driving rod 21 is fixed, and the left telescopic driving rod 21 is telescopically actuated up and down to adjust the height of the iron remover body 10 or rotate the iron remover body 10 to a certain angle.

[0041] When using this system, based on the thickness of the material pile that is about to reach the bottom of the iron removal belt 15, the height of the installation 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 telescopic drive rod 21, so that the iron removal belt 15 is close to the material pile or has a certain angle of attack with the direction of 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 tends to gradually decrease, so that the magnetic force of the magnet 14 on the iron-containing impurity blocks in the material pile is gradiently distributed along the moving direction of the material. As impurities with higher iron content are screened out, the small and medium-sized impurity blocks with less 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, the particle size uniformity of the residual anode fragments is improved and the content of small iron-containing impurities is reduced.

[0042] Furthermore, in order 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 above-mentioned mounting frame 11 is fixedly connected to an auxiliary suspension frame 111 through four vertical poles, and an independent operating space is provided below it for the iron removal belt 15. The above-mentioned bracket 20 is composed of two symmetrically arranged door frame-shaped frames, the tops of which are connected by a cross bar, and the two ends of the telescopic drive rod 21 are respectively connected to the cross bar 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.

[0043] Furthermore, in order to improve the safety of the use of the iron remover body 10, the iron remover body 10 also includes a suspension member 22. Specifically, the suspension member 22 includes a cable, chain or other connector that enables the bracket 20 to establish a flexible connection with the mounting frame 11. The suspension members 22 are symmetrically distributed on both sides of the mounting frame 11. The two ends of the suspension member 22 are respectively connected to the auxiliary suspension frame 111 on the mounting frame 11 and the top of the bracket 20 by snaps to achieve a detachable connection. After the iron remover body 10 establishes a flexible connection with the bracket 20, when the iron remover body 10 is under maintenance or shut down, the weight of the iron remover body 10 is borne by the suspension member 22, thereby reducing the load-bearing burden of the telescopic drive rod 21 and extending its service life.

[0044] In one embodiment, the suspension member 22 includes a first connecting rod 221 and a second connecting rod 222, wherein one end of the first connecting rod 221 and the second connecting rod 222 are spirally telescopically matched by a thread, and the other end is provided with a flexible rope 223, such as a steel rope, and one end of the flexible rope 223 is respectively provided with a lock buckle 224. The bracket 20 and the mounting frame 11 are both provided with a hanging ring 112, and the hanging ring 112 is used to achieve a snap connection with the lock buckle 224. By rotating the first connecting rod 221 and the second connecting rod 222 to increase or shorten the distance between the iron remover body 10 and the bracket 20, the height difference between the iron remover body 10 and the material pile can be finely controlled beyond the deflection angle that can be adjusted by the telescopic drive rod 21, thereby preventing the magnet 14 from being too high from the material, resulting in insufficient attraction of iron-containing impurities, or preventing the iron removal belt 15 from being too low, resulting in direct contact between the scraper 151 and the residual anode material pile, resulting in screening failure. In addition, in this embodiment, along the material transportation direction, the length of the suspension member 22 on the front side of the installation frame 11 is shorter than the length of the suspension member 22 on the rear side of the installation frame 11, so that the belt-type iron remover body can maintain a certain inclination angle without the active angle adjustment of the telescopic drive rod 171, so as to actively form a magnetic field inclined to the material transportation direction.

[0045] 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 plurality of correcting rollers 113 are provided on one side of the above-mentioned mounting frame 11. The correcting rollers 113 are distributed at the same end of the drive roller 12 and their axial directions are perpendicular to the iron removal belt 15. The side edges of the iron removal belt 15 are in rolling contact with the correcting rollers 113.

[0046] When using the above system, the side of the installation frame 11 provided with the correcting roller 113 is located on the side away from the material. Since the side of the installation frame 11 that meets the material needs to be deflected upward, the iron removal belt 15 tends to deviate downward along the axis of the driving roller 12. The correcting roller 113 can roll with the iron removal belt 15 during the rotation of the iron removal belt 15, hindering the iron removal belt 15 from deviating downward, ensuring that the iron removal belt 15 screens out iron-containing impurities in a fixed direction and range, and also ensuring the safety of the iron remover body 10 during the production operation.

[0047] When using the above system, during the process of the magnet 14 adsorbing iron-containing impurities, the higher mass 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 the magnet 14. Since the iron removal belt 15 is running at high speed, the impact may cause the iron removal belt 15 to wear faster or the magnet 14 to be damaged. In order to solve a series of problems caused by this phenomenon, a buffer assembly 16 is provided between the magnet 14 and the iron removal belt 15. Several pairs of buffer assemblies 16 are distributed between a pair of drive rollers 12 located below the magnet 14, and the inner side of the iron removal belt 15 is in rolling contact with at least part of the buffer assembly 16. Specifically, the above-mentioned buffer assembly 16 includes a pair of shock-absorbing cylinders 161 and a follower roller 162. The shock-absorbing cylinders 161 are distributed at both ends of the driving roller 12 and rings are provided at both ends of the shock-absorbing cylinders 161. A rotating shaft is provided on the side of the mounting frame 11, wherein the ring at one end of the shock-absorbing cylinder 161 is rotatably connected to the rotating shaft through a bearing, and the ring at the other end is rollingly fitted with both ends of the follower roller 162 through bearings. Under the rebound action of the shock-absorbing cylinder 161, the inner side of the iron removal belt 15 is always in rolling contact with the follower roller 162.

[0048] When the magnet 14 absorbs impurity blocks with a high iron content, the impact of the impurity blocks on the iron removal belt 15 can be compressed and offset by the shock absorber 161. The rebound of the shock absorber 161 enables the iron removal belt 15 to continuously screen out iron-containing impurities, so 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.

[0049] Obviously, the above embodiments of the present application are merely examples for the purpose of clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those skilled in the art, other variations or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for removing iron from electrode paste raw materials after crushing, characterized in that: The steps include: S1. Based on the material conveyor belt transporting the material pile passing from below the iron removing machine body, the adjacent spacing D of the material pile on the material conveyor belt is controlled to be not less than the magnetic field length L distributed along the direction of transportation of the material conveyor belt in the iron removing machine body; S2. Obtain the thickness of the material pile at the first position ,based on Adjust the height difference between the front edge of the iron remover 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 remover body in the transport direction, and H represents the maximum distance that the magnetic field of the iron remover body can cover in the height direction; S3. Obtain the thickness of the material pile at the second position, the third position, and the nth position along the moving path of the material pile. 、 … ,like < ,based on Adjust the height difference between the rear edge of the iron remover body and the material pile ,in, The second position, the third position ... the nth position are all located within the coverage range of the magnetic field length L distributed along the transport direction of the material conveyor belt of the iron remover body; S4. Repeat steps S2 to S3.

2. The method for removing iron from the electrode paste raw material after crushing according to claim 1, characterized in that: The step S3 also includes adjusting the front and rear edges of the iron remover body to the same level within a time T after the material pile passes through the range of the magnetic field length L distributed along the material conveyor belt. , where M represents the distance between the first position and the front edge of the iron remover body, and V represents the transport speed of the material conveyor belt.

3. The method for removing iron from the electrode paste raw material after crushing according to claim 1, characterized in that: The nth position does not exceed the length L of the magnetic field distributed by the iron remover body along the direction of the material conveyor belt. .

4. A system for removing iron from electrode paste raw materials after crushing, applied to the method for removing iron from electrode paste raw materials after crushing according to any one of claims 1 to 3, characterized in that: It includes an iron remover body, a bracket, a material conveyor belt and a controller. At least one pair of telescopic drive rods are symmetrically arranged at the top of the bracket in the vertical direction, and the bottom ends of the telescopic drive rods are rotatably connected to the iron remover body; the material conveyor belt passes through the bracket and is located below the iron remover body. The material conveyor belt is provided with a number of material thickness sensors along its conveying direction, and the material thickness sensors are electrically connected to the controller and the telescopic drive rods. The controller includes a storage, a processor and a computer program stored in the storage and runnable on the processor. When the computer program is executed by the processor, the steps of the method for removing iron after crushing the electrode paste raw materials as described in any one of claims 1 to 3 are implemented.

5. The iron removal system after crushing electrode paste raw materials according to claim 4, characterized in that: The iron remover 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 matched with the mounting frame. A magnet is provided in the mounting frame, and 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 provided on one side of the mounting frame, and its output end is transmission-connected to any of the drive rollers. The outer cover of the drive roller is provided with an iron removal belt.

6. The iron removal system after crushing electrode paste raw materials according to claim 5, characterized in that: A plurality of hanging parts are symmetrically distributed on both sides of the installation frame, and two ends of the hanging parts are respectively connected with the installation frame and the bracket by buckles.

7. The iron removal system after crushing electrode paste raw materials according to claim 6, characterized in that: The suspension member includes a first connecting rod and a second connecting rod, one end of the first connecting rod and the second connecting rod are each provided with a flexible rope, one end of the flexible rope is connected to a lock buckle, the first connecting rod and the second connecting rod are rotated and telescopically matched at one end away from the flexible rope through a thread, and the bracket and the mounting frame are provided with a hanging ring on the opposite side, and the lock buckle is buckled with the hanging ring.

8. The iron removal system for electrode paste raw materials after crushing according to claim 5, characterized in that: A plurality of correcting rollers are rotatably provided on one side of the mounting frame. The correcting rollers are distributed at one end of the driving roller and their axes are perpendicular to the iron removal belt. The side edges of the iron removal belt are in rolling contact with the correcting rollers.

9. The iron removal system for electrode paste raw materials after crushing according to claim 5, characterized in that: 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 driving rollers. The iron removal belt is in rolling contact with at least part of the buffer assembly.

10. The iron removal system after crushing electrode paste raw materials according to claim 9, characterized in that: 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 driving roller and one end thereof is rotatably connected to the mounting frame. The two ends of the follower roller are respectively rollingly matched 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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