Iron removal device for slurry and slurry treatment system

Abstract

The utility model discloses a kind of iron removal device and slurry processing system for slurry, the iron removal device includes shell and magnet bar, the cavity suitable for slurry to pass is formed in the shell interior;The magnet bar is configured as multiple and is set in the cavity interior, each the magnet bar is strip or columnar structure and is arranged along the axial direction of the shell;Wherein multiple the magnet bar is arranged in array form, and at least part magnet bar is arranged around the center of the cavity, and the fluid channel for slurry flow is formed between each magnet bar and the cavity inner wall and adjacent the magnet bar each other spaced apart. According to the iron removal device of the utility model, uniform stable magnetic field can be generated, the effective removal of magnetic substance in slurry is realized, and the structure is simple, low in cost and good in demagnetization effect.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to an iron removal device and a slurry treatment system for slurry. Background Technology

[0002] In the production process of lithium iron phosphate, the in-situ coating high-temperature solid-phase method is the current mainstream process. This process has the characteristics of high efficiency, simplicity and stability, and is therefore widely used.

[0003] The high-temperature solid-state process uses raw materials in powder form. To ensure the uniformity of subsequent chemical reactions, the raw materials need to be mixed during actual production, which involves grinding the powder into a slurry. However, due to the manufacturing process of the raw materials, they may contain some magnetic substances that cannot be removed in upstream processes. Furthermore, during the subsequent grinding of lithium iron phosphate, the friction from equipment rotation generates new magnetic foreign matter. Therefore, demagnetization equipment is required between each step of the slurry processing.

[0004] Among related technologies, electromagnetic separators and permanent magnet separators are common demagnetizing devices, but both have drawbacks. Electromagnetic separators are bulky, complex in structure, and have high maintenance costs. Furthermore, the high cost of the equipment itself drives up the overall cost of lithium iron phosphate production. In addition, the magnetic core requires periodic disassembly for acid soaking and cleaning, significantly increasing maintenance time and costs. Permanent magnet separators, on the other hand, suffer from uneven magnetic field strength, leading to unstable demagnetization effects and impacting product quality. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide an iron removal device for slurry. The iron removal device according to this invention can generate a uniform and stable magnetic field, achieving effective removal of magnetic substances from the slurry. It has a simple structure, low cost, and good demagnetization effect.

[0006] This utility model also proposes a slurry treatment system with the above-mentioned iron removal device.

[0007] The iron removal device according to this utility model is used for slurry. The iron removal device includes: a shell, the interior of which is formed a cavity suitable for slurry passage; and a plurality of magnetic rods, each of which is a strip or columnar structure and arranged along the axial direction of the shell. The plurality of magnetic rods are arranged in an array, and at least some of the magnetic rods are arranged around the center of the cavity. Adjacent magnetic rods are spaced apart from each other, and a fluid channel for slurry flow is formed between each magnetic rod and the inner wall of the cavity.

[0008] According to this utility model, the iron removal device enhances adsorption capacity and improves demagnetization efficiency by constructing multiple magnetic rods. Each magnetic rod is a strip or columnar structure arranged along the axial direction of the shell, which facilitates installation and allows the slurry to fully contact the magnetic rod as it passes through the cavity, thereby improving the demagnetization effect. Multiple magnetic rods are arranged in an array, ensuring uniform distribution within the cavity and creating a relatively uniform and effective magnetic field environment. This allows the slurry to experience a more consistent magnetic field as it passes through the cavity, facilitating comprehensive and uniform demagnetization. At least some of the magnetic rods are arranged around the center of the cavity, resulting in denser magnetic lines of force and stronger magnetic field strength in the central region, generating a stronger adsorption force on the magnetic materials in the slurry and further improving demagnetization efficiency. By spacing adjacent magnetic rods and forming fluid channels, sufficient contact between the slurry and the magnetic rods is ensured without excessive obstruction to the slurry flow, ensuring the normal operation of the iron removal device and a highly efficient demagnetization effect.

[0009] According to some embodiments of the present invention, the shell is a cylindrical structure, and a plurality of magnetic rods are arranged at intervals in the circumferential direction around the axis of the cylinder.

[0010] According to some embodiments of the present invention, the iron removal device further includes a flushing device disposed in the housing, the flushing device being adapted to supply water into the cavity, and the housing having a selectable water return channel.

[0011] According to some embodiments of the present invention, the rinsing device includes at least one water supply pipe extending into the cavity and having spray holes arranged in the same quantity as the magnetic rod. The water supply pipe is parallel to the axis of the housing and each spray hole faces the corresponding magnetic rod.

[0012] According to some embodiments of the present invention, the iron removal device further includes a purging device, which is disposed in the housing and used to provide airflow into the cavity.

[0013] According to some embodiments of the present invention, the purging device includes at least one gas pipeline, the gas pipeline is provided with a plurality of air outlets, each of the air outlets being adapted to blow airflow into the cavity.

[0014] The following describes a slurry treatment system with the aforementioned iron removal device according to the present invention.

[0015] The slurry processing system according to this utility model includes: a first grinding tank and a second grinding tank; and an iron removal device, which is connected to both the first and second grinding tanks and configured as described in any of the above embodiments. The iron removal device is adapted to remove ferromagnetic impurities from the slurry flowing from the first grinding tank to the second grinding tank. Since the slurry processing system includes the iron removal device described in any of the above embodiments, the slurry processing system according to this utility model can efficiently remove magnetic substances from the slurry, ensuring efficient slurry processing between the first and second grinding tanks, and improving product quality and processing efficiency.

[0016] According to some embodiments of the present invention, the slurry treatment system further includes: a return pipeline, which connects the iron removal device to the first grinding tank or the second grinding tank, and a fluid channel is provided in the return pipeline to return the slurry to the first grinding tank or the second grinding tank through the fluid channel.

[0017] According to some embodiments of the present invention, the slurry treatment system further includes: a fluid driving device for driving the slurry flow in the return pipeline; and / or the fluid driving device for driving the slurry in the first grinding tank to the iron removal device; and / or the fluid driving device for driving the slurry in the iron removal device to the second grinding tank.

[0018] According to some embodiments of the present invention, the slurry treatment system further includes a sand mill, which is disposed between the discharge port of the iron removal device and the inlet of the second grinding tank, and is used to further grind the slurry after iron removal.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a front cross-sectional view of an iron removal device according to an embodiment of the present invention;

[0022] Figure 2 This is a top view of an iron removal device according to an embodiment of the present invention;

[0023] Figure 3 This is a front cross-sectional view of an iron removal device according to another embodiment of the present invention;

[0024] Figure 4This is a top view of an iron removal device according to another embodiment of the present invention;

[0025] Figure 5 This is an architectural diagram of a slurry processing system according to an embodiment of the present invention;

[0026] Figure 6 This is an architectural diagram of a slurry processing system according to another embodiment of the present invention.

[0027] Figure label:

[0028] 1. Iron removal device;

[0029] 11. Housing; 12. Magnetic rod; 13. Flushing device; 14. Blowing device;

[0030] 2. Slurry processing system;

[0031] 21. First grinding jar; 22. Second grinding jar; 23. Return pipeline; 24. Fluid drive device; 241. First fluid drive device; 242. Second fluid drive device; 25. Sand mill.

[0032] 261. Cleaning valve; 262. Air blowing valve; 263. Slag discharge valve; 264. Raw material valve; 265. Clean material valve; 266. Return material valve. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] Among related technologies, electromagnetic separators and permanent magnet separators are common demagnetizing devices, but both have drawbacks. Electromagnetic separators are bulky, complex in structure, and have high maintenance costs. Furthermore, the high cost of the equipment itself drives up the overall cost of lithium iron phosphate production. In addition, the magnetic core requires periodic disassembly for acid soaking and cleaning, significantly increasing maintenance time and costs. Permanent magnet separators, on the other hand, suffer from uneven magnetic field strength, leading to unstable demagnetization effects and impacting product quality.

[0035] The following is for reference. Figures 1-4 Description of an iron removal device 1 according to an embodiment of the present utility model.

[0036] like Figures 1-4As shown, the iron removal device 1 according to this utility model is used for slurry. The iron removal device 1 includes a housing 11 and a magnetic rod 12. The housing 11 is used to support and protect the internal magnetic rod 12 and to contain the slurry. A cavity suitable for the passage of slurry is formed inside the housing 11, allowing the slurry to flow through the cavity, thereby achieving the demagnetization operation. The magnetic rod 12 can adsorb magnetic materials, thereby removing magnetic materials from the slurry passing through the cavity.

[0037] Multiple magnetic rods 12 are constructed and disposed inside the cavity, thereby adsorbing magnetic substances in the slurry. By constructing multiple magnetic rods 12, the adsorption capacity can be enhanced and the demagnetization efficiency can be improved. Each magnetic rod 12 is a strip-shaped or columnar structure and is arranged along the axial direction of the housing 11, which facilitates installation and allows the slurry to make full contact with the magnetic rod 12 when passing through the cavity, thereby improving the demagnetization effect.

[0038] Multiple magnetic rods 12 are arranged in an array. This array arrangement ensures that the magnetic rods 12 are evenly distributed within the cavity, thereby creating a relatively uniform and effective magnetic field environment inside the cavity. This allows the slurry to be subjected to a more consistent magnetic field as it passes through the cavity, facilitating comprehensive and uniform demagnetization of the slurry. At least some of the magnetic rods 12 are arranged around the center of the cavity, resulting in denser magnetic field lines and enhanced magnetic field strength in the central region of the cavity. This generates a stronger attraction force on the magnetic materials in the slurry, further improving the demagnetization efficiency.

[0039] Adjacent magnetic rods 12 are spaced apart from each other, and a fluid channel is formed between each magnetic rod 12 and the inner wall of the cavity for slurry flow. The fluid channel provides a path for the slurry to flow. When the slurry flows in the cavity, it passes through the fluid channel. During the flow, the magnetic materials in the slurry are attracted by the magnetic field generated by the magnetic rods 12. The demagnetized slurry can then pass through smoothly, achieving the demagnetization treatment of the slurry. By spacing adjacent magnetic rods 12 apart and forming fluid channels, it is ensured that the slurry can fully contact the magnetic rods 12 without causing excessive obstruction to the flow of the slurry, thus ensuring the normal operation of the iron removal device 1 and the efficient demagnetization effect.

[0040] Therefore, the iron removal device 1 according to this utility model can generate a uniform and stable magnetic field, thereby effectively removing magnetic substances from the slurry. It has a simple structure, low cost, and good demagnetization effect.

[0041] According to some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the shell 11 has a cylindrical structure, which makes the surface of the shell 11 smooth and continuous without sharp edges. This not only facilitates processing and manufacturing, reducing production difficulty and cost, but also reduces the obstruction to the slurry when it passes through, making the slurry flow more stable and smooth, which is conducive to ensuring the stability and continuity of the iron removal process.

[0042] Multiple magnetic rods 12 are arranged circumferentially around the axis of the cylinder. The axis of the cylinder is its central axis of symmetry. By arranging the magnetic rods 12 around the axis of the cylinder, the space of the cavity can be fully utilized, making the distribution of the magnetic rods 12 within the cavity more uniform and reasonable, which is conducive to generating a uniform and stable magnetic field. The circumferential spacing of the magnetic rods 12, that is, maintaining a certain distance between adjacent magnetic rods 12, provides sufficient flow space for the slurry. The slurry can flow freely in the gaps between the magnetic rods 12, thereby ensuring the processing capacity and efficiency of the iron removal device 1.

[0043] The reasonable spacing between multiple magnetic rods 12 helps to form a uniform and effective magnetic field distribution, so that when the slurry passes through the cavity, the magnetic material in it can be subjected to magnetic force at all positions, which improves the comprehensiveness and thoroughness of demagnetization, and also provides convenience for subsequent maintenance, cleaning and replacement of magnetic rods 12.

[0044] According to some embodiments of this utility model, the extreme value of the magnetic induction intensity within the cavity is B, satisfying the following condition: 8000GS ≤ B ≤ 10000GS. When the extreme value of the magnetic induction intensity B is not less than 8000GS, the magnetic field can generate a sufficiently strong magnetic force. When the slurry passes through the cavity, the magnetic materials in the slurry are significantly attracted by the magnetic force and effectively adsorbed onto the magnetic rod 12, ensuring the reliability and efficiency of the iron removal process and meeting the requirements for removing magnetic materials from the slurry. Furthermore, when the extreme value of the induction intensity B is not higher than 10000GS, the electrical energy consumed to maintain the magnetic field can be limited, controlling costs and improving economic efficiency.

[0045] According to some embodiments of this utility model, such as Figure 4 As shown, the iron removal device 1 also includes a rinsing device 13, which is disposed in the housing 11 and is adapted to supply water to the cavity. After the iron removal device 1 completes the demagnetization operation and a large amount of magnetic impurities are adsorbed on the surface of the magnetic rod 12, the rinsing device 13 can rinse the inside of the cavity by supplying water. The water flowing in the cavity can wash away the surface of the magnetic rod 12 and the inner wall of the cavity, washing away the magnetic impurities adsorbed on the magnetic rod 12 and the residual slurry and other substances in the cavity, thereby cleaning the iron removal device 1, restoring its good demagnetization performance, and preparing it for the next demagnetization operation.

[0046] The housing 11 has a selectable water return channel. During normal demagnetization operation, the water return channel is closed, ensuring that the slurry flows within the cavity along a predetermined path to complete the demagnetization task. When rinsing is required, the water return channel is opened, allowing the wastewater to drain smoothly from the cavity. By providing a water return channel, a discharge route is provided for the wastewater after rinsing, preventing wastewater accumulation within the cavity, ensuring the smooth progress of the rinsing operation, and maintaining the cleanliness of the internal environment of the iron removal device 1.

[0047] It should be noted that the residual slurry inside the cavity can also be carried out by the water flow. Therefore, the first part of the water used to rinse the inside of the cavity can be collected through the return water channel and reused in the lithium iron phosphate production process, realizing the recycling of resources and reducing production costs.

[0048] According to some embodiments of this utility model, such as Figure 4 As shown, the rinsing device 13 includes at least one water supply pipe extending into the cavity, allowing water to be directly delivered to the area requiring rinsing. This ensures the rinsing water accurately reaches the cavity, providing a foundation for subsequent rinsing operations. The water supply pipe has a number of nozzles equal to the number of magnetic rods 12. These nozzles serve as outlets for the rinsing water entering the cavity from the water supply pipe. By providing multiple nozzles, the number of water outlets is increased, expanding the rinsing range and enabling more comprehensive rinsing of the cavity's interior, thus improving rinsing efficiency. Each nozzle can be positioned directly opposite a magnetic rod 12, allowing the rinsing water sprayed from the nozzle to directly act on the corresponding surface of the magnetic rod 12, further enhancing the efficiency and accuracy of the rinsing operation.

[0049] The water supply pipeline is parallel to the axis of the housing 11, which makes full use of the space inside the cavity and makes the distribution of the water supply pipeline within the cavity more reasonable. This helps to form a more uniform rinsing area and ensures that all parts inside the cavity are effectively rinsed. Each nozzle is directed towards the corresponding magnetic rod 12, so that the rinsing water can be directly sprayed onto the surface of the magnetic rod 12, powerfully rinsing the magnetic rod 12 and effectively washing away the magnetic impurities adsorbed on it. This ensures that the demagnetizing performance of the magnetic rod 12 is restored and prepares it for the next demagnetizing operation.

[0050] It should be noted that although the water supply pipeline extends into the cavity, the portion extending into the cavity will not occupy too much space, thus avoiding interference with the normal flow and distribution of the slurry within the cavity.

[0051] According to some embodiments of this utility model, the flushing device 13 further includes a check valve, which is installed in the water supply pipeline. The check valve is used to control the unidirectional flow of fluid. When the flushing device 13 is working, the check valve is in the open state, allowing flushing water to flow smoothly from one end of the water supply pipeline to the other end, and then enter the cavity to flush the interior. When the flushing device 13 is not working, the check valve restricts the slurry from flowing back into the water supply pipeline under pressure, thereby ensuring that the slurry does not flow into the water supply pipeline.

[0052] According to some embodiments of this utility model, at least one water supply pipe is located at the center of the cavity, which allows the flushing water to cover the entire cavity more evenly and effectively, achieving a good flushing effect. When the water supply pipe is located at the center of the cavity, after the flushing water flows out of the pipe, the water flow can spread more evenly to the surrounding areas due to the relatively balanced distance from the walls of the cavity and the magnetic rod 12 in all directions, achieving uniform flushing.

[0053] According to some embodiments of this utility model, multiple water supply pipes are arranged circumferentially along the inner wall of the cavity, ensuring that flushing water is simultaneously sprayed into the cavity from all directions, providing comprehensive flushing of the magnetic rod 12 and the inner wall of the cavity. By arranging multiple water supply pipes circumferentially, mutual interference between the water flows of the multiple water supply pipes can be avoided, allowing the water flow to accurately flush the target area in a predetermined direction and force, thereby improving the utilization rate of water flow and flushing efficiency.

[0054] According to some embodiments of this utility model, the water pressure in the water supply pipeline is P1 and satisfies: 0.1MPa≤P≤0.2MPa. A water pressure P1 not lower than 0.1MPa ensures that the water flows in the water supply pipeline with sufficient power and speed, generating a water flow with a certain impact force to effectively wash away magnetic impurities adsorbed on the surface of the magnetic rod 12, ensuring a cleaning effect. A water pressure P1 not higher than 0.2MPa limits the impact force of the water pressure on the water supply pipeline, valves, and equipment components in contact with the water flow, ensuring the normal operation of the equipment.

[0055] According to some embodiments of this utility model, such as Figure 3 As shown, the iron removal device 1 also includes a purging device 14, which is disposed in the housing 11 and used to provide airflow into the cavity. When the cavity needs to be purged, the airflow generated by the purging device 14 impacts and pushes the residue in the cavity, drying the moisture and blowing away the residual magnetic material, thereby achieving the purpose of cleaning the cavity. Compared with rinsing, purging can more effectively clean magnetic material hidden in corners or crevices, further improving the cleanliness of the cavity and ensuring the demagnetizing performance of the iron removal device 1.

[0056] It should be noted that the purging device 14 can generate air pressure greater than that generated by the rinsing device 13. During the purging process, the powerful airflow can more effectively peel off and disperse magnetic materials that are difficult to remove due to insufficient water pressure from the attached surface. Compared to the rinsing device 13, the purging device 14, with its high air pressure, can more thoroughly clean the inside of the cavity, ensuring that every corner achieves an ideal clean state, providing a cleaner working environment for subsequent demagnetization operations.

[0057] Therefore, after rinsing the cavity with the rinsing device 13, the cavity can be further cleaned with the blowing device 14, achieving a more comprehensive and thorough cleaning of the cavity.

[0058] According to some embodiments of this utility model, the purging device 14 includes at least one gas pipeline for conveying gas. Depending on actual needs, the number of gas pipelines can be one or more. Using multiple gas pipelines can further optimize the airflow distribution and improve the purging effect.

[0059] The gas pipeline is equipped with multiple vents, each suitable for blowing air into the cavity. By providing these vents, gas can enter the cavity from different positions and directions, thus achieving a more comprehensive purging of the cavity's interior. The shape, size, and distribution of the vents can be designed according to specific purging requirements. For example, the vents can be circular, elliptical, or other suitable shapes; their size can be selected based on the required airflow velocity and pressure; and their distribution can be uniform, non-uniform, or distributed according to a specific pattern to achieve the best purging effect.

[0060] According to some embodiments of this utility model, the gas pressure in the gas pipeline is P2 and satisfies: 0.3MPa≤P≤0.4MPa. A gas pressure P2 not lower than 0.3MPa ensures that the airflow generated by the purging device 14 has sufficient power and speed to effectively peel off residual magnetic material from the adhesion surface and blow it out of the cavity, improving the cleanliness of the cavity. A gas pressure P2 not higher than 0.4MPa ensures purging effectiveness while also considering equipment safety and energy consumption control.

[0061] The following is for reference. Figure 5 and Figure 6 This invention introduces a slurry treatment system 2 having the aforementioned iron removal device 1.

[0062] like Figure 5 and Figure 6As shown, the slurry processing system 2 according to this utility model includes a first grinding tank 21, a second grinding tank 22, and an iron removal device 1. The first grinding tank 21 and the second grinding tank 22 each form a space for storing slurry. Specifically, the raw slurry is first stored in the first grinding tank 21, and the slurry flowing out of the first grinding tank 21 is sequentially iron-removed and ground before flowing into the second grinding tank 22.

[0063] The iron removal device 1 is connected to the first grinding tank 21 and the second grinding tank 22, respectively, so that the slurry stored in the first grinding tank 21 can flow smoothly into the iron removal device 1, and after iron removal treatment, it flows into the second grinding tank 22 for storage. By setting the iron removal device 1 between the first grinding tank 21 and the second grinding tank 22, magnetic impurities in the slurry can be effectively removed, preventing these impurities from entering subsequent production stages, thereby improving the purity and quality of the final product. The iron removal device 1 is constructed as in any of the above embodiments, and is suitable for removing ferromagnetic impurities from the slurry flowing from the first grinding tank 21 to the second grinding tank 22. Since the slurry processing system 2 includes the iron removal device 1 in any of the above embodiments, the slurry processing system 2 according to this utility model can efficiently remove magnetic substances from the slurry, ensuring efficient processing of the slurry between the first grinding tank 21 and the second grinding tank 22, and improving product quality and processing efficiency.

[0064] According to some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the slurry treatment system 2 also includes a return pipeline 23, which connects the iron removal device 1 to the first grinding tank 21 or the second grinding tank 22. A fluid channel is provided within the return pipeline 23, through which the slurry is returned to the first grinding tank 21 or the second grinding tank 22. After the slurry in the iron removal device 1 flows into the second grinding tank 22, residual slurry remains in the iron removal device 1. By providing the return pipeline 23, the residual slurry can be smoothly returned to the first grinding tank 21 or the second grinding tank 22 via the fluid channel.

[0065] Specifically, the residual slurry can be carried out by the water flow generated by the flushing device 13 and recycled through the return pipe, thereby realizing the recycling and reuse of the slurry, optimizing the entire processing flow, and improving resource utilization.

[0066] According to some embodiments of this utility model, such as Figure 5 and Figure 6As shown, the slurry processing system 2 also includes a fluid drive device 24. During the slurry processing, the slurry needs to be transported and circulated between various devices, for example, flowing from the first grinding tank 21 to the iron removal device 1, and then from the iron removal device 1 to the second grinding tank 22, or being returned through the return pipeline 23, etc. The fluid drive device 24 generates power to overcome the resistance of the slurry flowing in the pipelines and equipment, and propels the slurry to flow along a predetermined path and speed, so that each processing step within the slurry processing system 2 can proceed smoothly.

[0067] According to some embodiments of the present invention, the fluid drive device 24 is used to drive the flow of slurry in the return pipeline 23. The power provided by the fluid drive device 24 can overcome the resistance of the slurry when flowing in the return pipeline 23, ensuring that the residual slurry is efficiently returned to the first grinding tank 21 or the second grinding tank 22.

[0068] According to some embodiments of the present invention, the fluid drive device 24 is used to drive the slurry in the first grinding tank 21 to flow to the iron removal device 1. The power provided by the fluid drive device 24 can overcome the flow resistance of the slurry during the transportation process, ensuring that the slurry in the first grinding tank 21 is stably and efficiently transported to the iron removal device 1.

[0069] According to some embodiments of this utility model, the fluid drive device 24 is used to drive the slurry in the iron removal device 1 to flow to the second grinding tank 22. The power provided by the fluid drive device 24 can effectively overcome the flow resistance of the slurry during the conveying process after iron removal, ensuring that the iron-removed slurry is stably and efficiently conveyed to the second grinding tank 22.

[0070] According to some embodiments of this utility model, the slurry treatment system 2 further includes a sand mill 25, which is disposed between the discharge port of the iron removal device 1 and the inlet of the second grinding tank 22. The sand mill 25 is used to further grind the slurry after iron removal. Through the grinding action of the sand mill 25, the particles of the slurry after iron removal treatment can be further refined to ensure that the slurry meets the particle size distribution and uniformity requirements of subsequent processes.

[0071] Specifically, the sand mill 25 generates strong shearing force, friction force and impact force through the high-speed relative motion between the sand milling media and the slurry, thereby further refining the particles in the slurry.

[0072] like Figure 5 and Figure 6As shown, according to some embodiments of the present invention, the slurry treatment system 2 further includes a cleaning valve 261, which is connected to the flushing device 13. The cleaning valve 261 is adapted to selectively open or close to control the flow of flushing water in the flushing device 13. When the iron removal device 1 completes the demagnetization operation, magnetic materials are adsorbed on the surface of the magnetic rod 12, and cleaning is required, the cleaning valve 261 is opened. At this time, the flushing water can smoothly pass through the cleaning valve 261 into the flushing device 13, and then reach the cavity of the iron removal device 1, flushing the surface of the magnetic rod 12 and the inner wall of the cavity, washing away the magnetic materials adsorbed on the magnetic rod 12 and the slurry and other substances remaining in the cavity. When the cleaning operation is completed, the cleaning valve 261 is closed, and the flushing water stops flowing.

[0073] like Figure 5 and Figure 6 As shown, according to some embodiments of the present invention, the slurry treatment system 2 further includes an air blowing valve 262, which is connected to the gas pipeline of the purging device 14. The air blowing valve 262 is adapted to selectively open or close to control the flow of gas in the purging device 14. After the iron removal device 1 completes the rinsing operation, some moisture and magnetic substances remain in the cavity. At this time, the purging device 14 can be activated for further cleaning. By controlling the air blowing valve 262 to open, gas can smoothly pass through the air blowing valve 262 into the gas pipeline and then reach the cavity of the iron removal device 1. When the purging operation is completed, by controlling the air blowing valve 262 to close, the gas in the gas pipeline stops flowing.

[0074] like Figure 5 and Figure 6 As shown, according to some embodiments of this utility model, the slurry treatment system 2 further includes a slag discharge valve 263, which is located at the bottom of the iron removal device 1. After rinsing or purging, magnetic materials will accumulate at the bottom of the iron removal device 1 under gravity. By placing the slag discharge valve 263 at the bottom, the magnetic materials can be easily discharged. After the magnetic materials have been discharged, the slag discharge valve 263 is closed, and the normal operation of the iron removal device 1 is restored. At this time, the slurry can flow normally from the first grinding tank 21 through the iron removal device 1 to the second grinding tank 22.

[0075] like Figure 5 and Figure 6As shown, according to some embodiments of the present invention, the slurry processing system 2 further includes a raw material valve 264, which is disposed between the first grinding tank 21 and the iron removal device 1. The raw material valve 264 is adapted to selectively open or close to control the flow of slurry from the first grinding tank 21 to the iron removal device 1. According to the production process flow, when it is necessary to transport slurry from the first grinding tank 21 to the iron removal device 1, the raw material valve 264 can be controlled to open, allowing the slurry in the first grinding tank 21 to flow to the iron removal device 1; when it is not necessary to transport slurry from the first grinding tank 21 to the iron removal device 1, the raw material valve 264 can be controlled to close, thereby interrupting the flow of slurry from the first grinding tank 21 to the iron removal device 1.

[0076] like Figure 5 and Figure 6 As shown, according to some embodiments of the present invention, the slurry processing system 2 further includes a clean material valve 265, which is disposed between the iron removal device 1 and the second grinding tank 22. The clean material valve 265 is adapted to selectively open or close to control the flow of slurry from the iron removal device 1 to the second grinding tank 22. After the iron removal device 1 completes the removal of magnetic substances from the slurry, the clean material valve 265 can be controlled to open according to the production process flow, so that the slurry in the iron removal device 1 flows to the second grinding tank 22, thereby storing the slurry after iron removal treatment. After the slurry in the iron removal device 1 has been completely conveyed to the second grinding tank 22, the clean material valve 265 is controlled to close to facilitate the next work cycle.

[0077] like Figure 5 and Figure 6 As shown, according to some embodiments of the present invention, the slurry processing system 2 further includes a return valve 266, which is disposed in the return pipeline 23. The return valve 266 is adapted to selectively open or close to control the flow of slurry back to the first grinding tank 21 or the second grinding tank 22 through the fluid channel. After the slurry is conveyed to the second grinding tank 22 by the iron removal device 1, the return valve 266 can be opened to allow the residual slurry to return to the first grinding tank 21 or the second grinding tank 22 through the return pipeline 23 under the influence of the flushing water flow, thereby realizing slurry recovery and enabling the use of residual slurry in the next working cycle, thus improving resource utilization. When the return process is completed, the return valve 266 is closed to ensure the sealing of the return pipeline 23, so that the slurry processing system 2 can proceed with the next working cycle.

[0078] like Figure 5As shown, according to some embodiments of the present invention, the fluid drive device 24 is constructed as two separate fluid drive devices: a first fluid drive device 241 and a second fluid drive device 242. The first fluid drive device 241 is located in the return pipeline 23 and downstream of the return valve 266, while the second fluid drive device 242 is located between the raw material valve 264 and the first grinding tank 21. The first fluid drive device 241 is adapted to drive the flow of slurry in the return pipeline 23. When the return valve 266 is opened, the first fluid drive device 241 is activated, which can push the residual slurry back to the first grinding tank 21 or the second grinding tank 22 through the fluid channel, ensuring the smooth progress of the slurry recovery process. After the return is completed, the first fluid drive device 241 stops operating to reduce energy consumption and extend the service life of the equipment. The second fluid drive device 242 is adapted to drive the slurry in the first grinding tank 21 to be conveyed to the iron removal device 1. When the raw material valve 264 is opened, the second fluid drive device 242 is activated, providing power to make the slurry flow from the first grinding tank 21 to the iron removal device 1. Once the slurry delivery is complete, the second fluid drive device 242 stops operating.

[0079] The following is based on Figure 5 The operation flow of a slurry processing system 2 according to an embodiment of the present invention is described.

[0080] Normal iron removal process: Open the raw material valve 264 located between the first grinding tank 21 and the iron removal device 1, and the clean material valve 265 located between the iron removal device 1 and the second grinding tank 22; close the return material valve 266 located on the return pipeline 23; and start the fluid drive device 24 installed between the first grinding tank 21 and the iron removal device 1. Driven by the fluid drive device 24, the slurry in the first grinding tank 21 enters the iron removal device 1 along the preset pipeline. The iron removal device 1 uses a magnetic field to remove magnetic substances from the slurry. The treated slurry enters the second grinding tank 22, completing the normal iron removal operation.

[0081] Residual material recovery process: When the iron removal device 1 has been running for a set time and the grinding operation is finished, the raw material valve 264 and the clean material valve 265 are closed, then the return material valve 266 is opened, and the fluid drive device 24 on the return pipeline 23 is started. Under the action of the fluid drive device 24 in the return pipeline 23, the residual slurry in the iron removal device 1 and the pipeline is recovered to the first grinding tank 21, realizing residual material recovery.

[0082] Rinse water recovery process: After the residual material is recovered, while keeping the fluid drive device 24 of the return pipeline 23 running, the cleaning valve 261 connecting to the rinsing device 13 is further opened. At this time, the cleaning water used for rinsing in the previous section is recovered to the first grinding tank 21 along the return pipeline 23, completing the rinse water recovery.

[0083] The slag removal and air-blowing process is as follows: After the rinsing water recovery is completed, the return valve 266 and the fluid drive device 24 on the return pipeline 23 are closed. The slag discharge valve 263 located at the bottom of the iron removal device 1 is opened, and the highly magnetic impurities adsorbed by the 8000-10000GS magnetic field are rinsed into the trench with rinsing water pressure of 0.1-0.2MPa. Subsequently, the cleaning valve 261 is closed, and the air-blowing valve 262 is opened, and the remaining highly magnetic residue in the chamber is blown into the trench with compressed air pressure of 0.3-0.4MPa. After the air-blowing slag removal is completed, the air-blowing valve 262 and the slag discharge valve 263 are closed, thus completing the entire iron removal and slag removal process. When the fluid drive device 24 between the first grinding tank 21 and the iron removal device 1 is restarted, the system enters the next operating cycle.

[0084] The following is based on Figure 6 The operation flow of the slurry processing system 2 according to another embodiment of the present invention is described.

[0085] Normal iron removal process: Open the raw material valve 264 and the clean material valve 265, and start the fluid drive device 24 located between the first grinding tank 21 and the iron removal device 1. Under the action of the fluid drive device 24, the slurry in the first grinding tank 21 is transported to the iron removal device 1 through the pipeline. The iron removal device 1 removes magnetic substances from the slurry by means of a magnetic field. The treated slurry is then processed by the sand mill 25 and enters the second grinding tank 22 to complete the normal iron removal process.

[0086] Residual material recovery process: When the iron removal device 1 has been running for a set time and the grinding operation is ongoing, the raw material valve 264 and the clean material valve 265 are closed, while the return material valve 266 and the cleaning valve 261 are opened. Using cleaning water at 0.1-0.2 MPa, the residual slurry in the iron removal device 1 and pipelines is recovered into the grinding mill, thus realizing the residual material recovery operation.

[0087] Washing and air-blowing slag removal process: After the residual material recovery is completed, close the return valve 266 and stop the grinding mill. Open the slag removal valve 263 to maintain a washing water pressure of 0.1-0.2MPa, washing the highly magnetic impurities adsorbed by the 8000-10000GS magnetic field into the ditch. Then, close the cleaning valve 261 and open the air-blowing valve 262 to blow the highly magnetic residual material in the magnetic cavity into the ditch with compressed air pressure of 0.3-0.4MPa. After the air-blowing slag removal is completed, close the air-blowing valve 262 and the slag removal valve 263. At this point, the entire iron removal and slag removal process is completed. When the fluid drive device 24 is restarted, the system enters the next operating cycle.

[0088] Therefore, Figure 6 The slurry processing system 2 shown is compared to Figure 5The slurry processing system 2 shown integrates the sand mill 25 used in the slurry processing process into the slurry processing system 2, which reduces the number of fluid drive devices 24, directly reduces equipment procurement costs and energy consumption costs in subsequent operation, and can improve economic efficiency.

[0089] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0090] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0091] In the description of this utility model, "multiple" means two or more.

[0092] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0093] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An iron removal device for slurry, characterized in that, include: The housing (11) has a cavity inside which is suitable for the passage of slurry; Magnetic rods (12), wherein multiple magnetic rods (12) are constructed and disposed inside the cavity, each magnetic rod (12) being a strip or columnar structure and arranged along the axial direction of the shell (11); wherein The plurality of magnetic rods (12) are arranged in an array, and at least some of the magnetic rods (12) are arranged around the center of the cavity, adjacent magnetic rods (12) are spaced apart from each other, and each magnetic rod (12) forms a fluid channel for slurry flow between itself and the inner wall of the cavity.

2. The iron removal device according to claim 1, characterized in that, The housing (11) is a cylindrical structure, and a plurality of magnetic rods (12) are arranged circumferentially around the axis of the cylinder.

3. The iron removal device according to claim 2, characterized in that, Also includes: A flushing device (13) is disposed on the housing (11) and is adapted to supply water into the cavity. A selectable return water channel is formed on the housing (11).

4. The iron removal device according to claim 3, characterized in that, The rinsing device (13) includes at least one water supply line extending into the cavity and having spray holes arranged in the same quantity as the magnetic rod (12). The water supply line is parallel to the axis of the housing (11) and each spray hole faces the corresponding magnetic rod (12).

5. The iron removal device according to claim 3, characterized in that, Also includes: A purging device (14) is disposed in the housing (11) and is used to provide airflow into the cavity.

6. The iron removal device according to claim 5, characterized in that, The purging device (14) includes at least one gas pipeline with multiple air outlets, each of which is adapted to blow airflow into the cavity.

7. A slurry processing system, characterized in that, include: First grinding jar (21) and second grinding jar (22); An iron removal device, which is connected to the first grinding tank (21) and the second grinding tank (22) respectively and is configured as the iron removal device according to any one of claims 1-6, the iron removal device being adapted to remove ferromagnetic impurities from the slurry flowing from the first grinding tank (21) to the second grinding tank (22).

8. The slurry processing system according to claim 7, characterized in that, Also includes: The return pipeline (23) connects the iron removal device to the first grinding tank (21) or the second grinding tank (22). The return pipeline (23) is provided with a fluid channel through which the slurry is returned to the first grinding tank (21) or the second grinding tank (22).

9. The slurry processing system according to claim 8, characterized in that, Also includes: A fluid drive device (24) is used to drive the flow of slurry in the return pipe (23); And / or the fluid drive device (24) is used to drive the slurry in the first grinding tank (21) to flow to the iron removal device; And / or the fluid drive device (24) is used to drive the slurry in the iron removal device to flow to the second grinding tank (22).

10. The slurry processing system according to claim 7, characterized in that, Also includes: A sand mill (25) is located between the discharge port of the iron removal device and the inlet of the second grinding tank (22). The sand mill (25) is used to further grind the slurry after iron removal.

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