Recycled aluminum screening separation device

By combining multi-layer screens and variable frequency vibration motors with magnetic separation components and intelligent control systems, the problems of easy screen clogging and low precision in the screening and separation process of recycled aluminum have been solved, realizing efficient and automated aluminum chip separation and improving production efficiency and separation accuracy.

CN224926477UActive Publication Date: 2026-11-03HEQING YIXIN ALUMINIUM IND CO LTD
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Patent Information

Application Number
CN202522516722.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-27
Publication Date
2026-11-03
Estimated Expiration
2035-11-27

AI Technical Summary

Technical Problem

The screening and separation process for recycled aluminum suffers from problems such as easy screen clogging, low screening accuracy and efficiency, limited processing capacity, high energy consumption, and high maintenance costs, making it difficult to achieve continuous, efficient, and automated screening and separation.

Method used

By employing a multi-layer screen and a variable frequency vibration motor, combined with a magnetic separation component and an intelligent control system, the feeding speed and vibration frequency are dynamically adjusted to achieve automated screening and separation.

Benefits of technology

It improved production efficiency, reduced aluminum chip loss and impurity content, enhanced processing capacity and separation accuracy, and reduced energy consumption and maintenance frequency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of recycled aluminium screening separation device, belong to solid separation technical field, for solving aluminium turnings screening procedure coherence is poor, equipment automation degree is low Problem.The recycled aluminium screening separation device of the utility model includes screening subassembly, magnetic separation subassembly and control system.Screening subassembly is connected in the discharge end of feed assembly.Screening subassembly includes multiple layers of screen and multiple variable frequency vibration motor.The output end of each variable frequency vibration motor is connected to a screen.Magnetic separation subassembly is arranged inside screening subassembly.Control system is connected to feed assembly and screening subassembly respectively.Control system can dynamically adjust the feeding speed of feed assembly and the vibration frequency of each variable frequency vibration motor according to the real-time load of each layer of screen.The utility model realizes the continuous, efficient, automated and intelligent screening separation of aluminium turnings, improves production efficiency, reduces aluminium turnings loss, and can reduce impurity content to below 0.5%.
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Description

Technical Field

[0001] This utility model belongs to the field of solid separation technology, specifically relating to a recycled aluminum screening and separation device. Background Technology

[0002] The recycling of recycled aluminum is of great significance for saving resources, reducing energy consumption, and mitigating environmental pollution. Efficient screening and separation is a crucial step in the recycling process, directly affecting the purity of the final product and the economic benefits of recycling. However, due to the irregular shape, static electricity, and strong adhesion of recycled aluminum raw materials (especially aluminum scraps), screen clogging is prone to occur during screening operations, leading to a sharp decline in screening accuracy and efficiency. This not only reduces the aluminum metal recovery rate (usually less than 85%) but also makes it difficult to effectively separate non-aluminum impurities (such as plastics, rubber, and dust). Furthermore, current screening operations have a low degree of automation; key parameters such as vibration frequency, amplitude, and feed rate are usually fixed values ​​or require manual adjustment, making it difficult to adapt to fluctuations in the particle size and composition of the incoming material. This not only limits processing capacity (generally less than 5 tons / hour) but also results in high energy consumption. Simultaneously, rapid screen wear and frequent clogging cleaning also lead to high maintenance costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a recycled aluminum screening and separation device that can achieve continuous, efficient and automated operation and intelligently adapt to changes in working conditions.

[0004] To address the aforementioned problems, this invention provides a recycled aluminum screening and separation device, comprising: a screening component, a magnetic separation component, and a control system. The screening component is connected to the discharge end of the feeding component. The screening component includes multiple layers of screens and multiple variable frequency vibrating motors. The output end of each variable frequency vibrating motor is connected to one screen. The magnetic separation component is disposed inside the screening component. The control system is connected to both the feeding component and the screening component. The control system can dynamically adjust the feeding speed of the feeding component and the vibration frequency of each variable frequency vibrating motor according to the real-time load of each layer of screens.

[0005] The feeding assembly includes a frame, a conveyor belt, a drive motor, and a leveling plate. The frame is equipped with a tension wheel and a drive wheel. The conveyor belt is connected between the tension wheel and the drive wheel. The drive motor is connected to the drive wheel to move the conveyor belt towards the screening assembly. The leveling plate is vertically adjustable above the conveyor belt to ensure that aluminum chips from the conveyor belt fall evenly into the screening assembly. The control system is connected to the drive motor.

[0006] In this case, the end of the conveyor belt closer to the screening component is lower than the end of the conveyor belt farther from the screening component.

[0007] The system includes a first screen, a second screen, and a third screen. The first screen is located directly above the second screen. The third screen is located diagonally below the second screen. The aperture of the screens decreases progressively from top to bottom. A magnetic separator is positioned between the second and third screens. Aluminum shavings screened out by the second screen fall into the magnetic separator, where iron impurities are removed before falling onto the third screen.

[0008] The magnetic separation assembly includes: a support frame, a guide plate, a rotating drum, a permanent magnet, a scraper, and a collection trough. The guide plate is mounted on the support frame. It is located below the second screen and above the third screen. The guide plate is inclined towards the third screen. The rotating drum is rotatably mounted on the support frame. It is located between the lowest point of the guide plate and the third screen. The rotating drum rotates from the guide plate towards the third screen. The permanent magnet is disposed within the rotating drum and is used to adsorb ferrous impurities onto its outer circumference. The scraper is mounted on the support frame. Along the rotation direction of the rotating drum, the scraper is located downstream of the third screen. The collection trough is located below the rotating drum and is used to collect the ferrous impurities scraped off by the scraper. A control system is connected to the rotating drum to regulate its rotational speed.

[0009] The permanent magnet is a neodymium iron boron permanent magnet.

[0010] The control system includes a controller, a flow sensor, and multiple weight sensors. The flow sensor is mounted on the feeding assembly to detect the real-time flow rate. Each weight sensor is mounted on a screen to monitor the real-time load on the screen. The controller is connected to the flow sensor, the multiple weight sensors, the feeding assembly, and multiple variable frequency vibration motors.

[0011] The control system also includes a touch panel, which is connected to the controller.

[0012] The vibration frequency of the variable frequency vibration motor is 10-50Hz.

[0013] The screen is made of stainless steel.

[0014] Beneficial effects: The recycled aluminum screening and separation device provided by this invention continuously feeds aluminum shavings containing impurities to the screen assembly via the feeding component. The screen assembly, utilizing multiple layers of screens and multiple variable frequency vibrating motors, screens the aluminum shavings, removing large particles. Furthermore, a magnetic separation component removes iron impurities from the aluminum shavings, thus achieving screening and separation. In addition, the control system dynamically adjusts the vibration frequency of the variable frequency vibrating motors and the feeding speed of the feeding component based on the real-time load of the screen to maintain optimal screening efficiency, prevent clogging, and reduce maintenance frequency. This invention achieves continuous, efficient, automated, and intelligent screening and separation of aluminum shavings, improving production efficiency, reducing aluminum shaving loss, and lowering the impurity content to below 0.5%. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a recycled aluminum screening and separation device according to an embodiment of this utility model; Figure 2 A schematic diagram of the structure of a feeding assembly according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of a magnetic separation component according to an embodiment of the present invention.

[0016] The reference numerals in the attached figures are as follows: 1. Feeding assembly; 2. Screening assembly; 3. Magnetic separation assembly; 4. Control system; 11. Frame; 12. Conveyor belt; 13. Drive motor; 14. Feeding plate; 15. Tensioner; 16. Drive wheel; 17. Gantry; 18. Lifting rod; 21. Screen; 22. Variable frequency vibration motor; 211. First screen; 212. Second screen; 213. Third screen; 31. Support; 32. Guide plate; 33. Rotating drum; 34. Permanent magnet; 35. Scraper; 36. Collection tank. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] This embodiment provides a high-efficiency screening and separation device for recycled aluminum. Figure 1 This is a schematic diagram of a recycled aluminum screening and separation device provided in this embodiment. Figure 2 This is a schematic diagram of the structure of a feeding assembly provided in this embodiment. Figure 3 This is a schematic diagram of the structure of a magnetic separation component provided in this embodiment.

[0022] like Figure 1 As shown, the recycled aluminum screening and separation device of this embodiment includes: a screening component 2, a magnetic separation component 3, and a control system 4. The screening component 2 is connected to the discharge end of the feeding component 1. The screening component 2 includes multiple layers of screens 21 and multiple variable frequency vibration motors 22. The output end of each variable frequency vibration motor 22 is connected to one screen 21. The magnetic separation component 3 is disposed inside the screening component 2. The control system 4 is connected to both the feeding component 1 and the screening component 2. The control system 4 can dynamically adjust the feeding speed of the feeding component 1 and the vibration frequency of each variable frequency vibration motor 22 according to the real-time load of each layer of screens 21.

[0023] In this embodiment, the recycled aluminum screening and separation device continuously feeds aluminum shavings containing impurities to the screen assembly 2 via the feeding component 1. The screen assembly 2, utilizing multiple layers of screens 21 and multiple variable frequency vibrating motors 22, screens the aluminum shavings to remove large particles. Furthermore, the magnetic separation component 3 removes iron impurities from the aluminum shavings, thus achieving screening and separation. Additionally, the control system 4 dynamically adjusts the vibration frequency of the connected variable frequency vibrating motor 22 based on the real-time load of each screen 21, and adjusts the feeding speed of the feeding component 1 based on the real-time load of each screen 21 to maintain optimal screening efficiency, prevent clogging, and reduce maintenance frequency. This invention achieves continuous, efficient, automated, and intelligent screening and separation of aluminum shavings, improving production efficiency, reducing aluminum shaving loss, and lowering the impurity content to below 0.5%.

[0024] Among them, such as Figure 2 As shown, the feeding assembly 1 includes: a frame 11, a conveyor belt 12, a drive motor 13, and a leveling plate 14. The frame 11 is equipped with a tensioning wheel 15 and a drive wheel 16. The conveyor belt 12 is driven between the tensioning wheel 15 and the drive wheel 16. The drive motor 13 is connected to the drive wheel 16 to drive the conveyor belt 12 to move towards the screening assembly 2. The leveling plate 14 is vertically and vertically positioned above the conveyor belt 12 to ensure that aluminum chips on the conveyor belt 12 fall evenly into the screening assembly 2. The control system 4 is connected to the drive motor 13.

[0025] For example, such as Figure 2 As shown, a gantry 17 is provided at one end of the frame 11 near the screening assembly 2. The gantry 17 spans the conveyor belt 12, and the leveling plate 14 is connected to the gantry 17 via a lifting rod 18. By controlling the extension and retraction of the lifting rod 18, the distance between the leveling plate 14 and the conveyor belt 12 can be changed, thereby changing the leveling thickness. To illustrate the connection relationship between the gantry 17, the lifting rod 18, and the leveling plate 14, in Figure 2 The gantry 17 in the middle section adopts a partial sectional view.

[0026] In this embodiment, the feeding assembly 1 uses a drive motor 13 to drive the drive wheel 16 to rotate, thereby driving the conveyor belt 12 to move towards the screening assembly 2 to convey aluminum chips into the screening assembly 2. This embodiment also includes a liftable leveling plate 14 above the conveyor belt 12, which can evenly distribute the aluminum chips on the conveyor belt 12 to the required thickness. The control system 4 adjusts the rotation speed of the drive motor 13 according to the real-time load of each screen 21 to control the moving speed of the conveyor belt 12, thereby controlling the flow rate of the material discharged from the feeding assembly 1 to the screening assembly 2. For example, when the control system 4 detects that the load of the screen 21 exceeds the maximum preset value, the discharge flow rate is reduced to avoid excessive accumulation of aluminum chips on the screen 21; conversely, when the control system 4 detects that the load of the screen 21 is below the minimum preset value, the discharge flow rate is increased to maintain screening efficiency and prevent the screening assembly 2 from operating under low load.

[0027] To prevent aluminum chips from falling off the conveyor belt 12 during the conveying process, baffles can also be installed on both sides of the conveyor belt 12 in the running direction.

[0028] Among them, such as Figure 2 As shown, the end of the conveyor belt 12 closer to the screening component 2 is lower than the end of the conveyor belt 12 further away from the screening component 2.

[0029] The inclined setting of the conveyor belt 12 in this embodiment can ensure that the aluminum chips on the conveyor belt fall into the screening component 2 efficiently and smoothly, reduce the obstruction and adhesion of aluminum chips on the conveyor belt 12, and prevent aluminum chips from falling outside the screening component 2 as the conveyor belt 12 moves.

[0030] Among them, such as Figure 1 and Figure 3 As shown, the screen 21 includes a first screen 211, a second screen 212, and a third screen 213. The first screen 211 is located directly above the second screen 212. The third screen 213 is located diagonally below the second screen 212. The aperture of the screen 21 gradually decreases from top to bottom. The magnetic separation assembly 3 is disposed between the second screen 212 and the third screen 213. The aluminum shavings screened out by the second screen 212 can fall into the magnetic separation assembly 3, where iron impurities are removed before falling onto the third screen 213.

[0031] Preferably, the mesh sizes of the first screen 211, the second screen 212, and the third screen 213 are 5 mm, 3 mm, and 1 mm, respectively. This arrangement facilitates the stepwise separation of aluminum chips of different particle sizes.

[0032] In this embodiment, the screen assembly 2 firstly separates aluminum chips of different particle sizes through the first screen 211 and the second screen 212 in sequence. After two-stage separation and screening, the aluminum chips are magnetically separated by the magnetic separation assembly 3 to separate iron impurities. The aluminum chips after magnetic separation are then further separated by the third screen 213 to reduce the impurity content and reduce aluminum chip loss.

[0033] The magnetic separation component 3 in this embodiment can be a drum magnetic separator, a roller magnetic separator, a drum-roller magnetic separator, or a flat plate magnetic separator, etc. This embodiment does not impose too many restrictions on this, as long as it meets the usage requirements.

[0034] Among them, such as Figure 3 As shown, the magnetic separation assembly 3 includes: a support 31, a guide plate 32, a rotating drum 33, a permanent magnet 34, a scraper 35, and a collection trough 36. The guide plate 32 is mounted on the support 31. The guide plate 32 is located below the second screen 212 and above the third screen 213. The guide plate 32 is inclined towards the third screen 213. The rotating drum 33 is rotatably mounted on the support 31. The rotating drum 33 is located between the lowest point of the guide plate 32 and the third screen 213. The rotating drum 33 rotates from the guide plate 32 towards the third screen 213. The permanent magnet 34 is placed inside the rotating drum 33 to adsorb ferrous impurities onto the outer circumferential surface of the rotating drum 33. The scraper 35 is mounted on the support 31. Along the rotation direction of the rotating drum 33, the scraper 35 is located downstream of the third screen 213. The collection trough 36 is located below the rotating drum 33 to collect the ferrous impurities scraped off by the scraper 35. The control system 4 is connected to the rotating drum 33 to regulate the rotational speed of the rotating drum 33.

[0035] For example, such as Figure 3 As shown, in this embodiment, the permanent magnet 34 is annular and fits against the wall of the rotating drum 33, and the two rotate synchronously. This arrangement ensures the adsorption effect. In other embodiments, the permanent magnet 34 can also be designed to be stationary to reduce the rotational load on the rotating drum 33 and save energy.

[0036] In this embodiment, the undersize product of the second screen 212 falls onto the guide plate 32. Because the guide plate 32 is inclined, the aluminum chips on it flow evenly towards the rotating drum 33 under its own gravity, and then flow towards the third screen 213 as the rotating drum 33 rotates. Since the rotating drum 33 contains a permanent magnet 34, iron impurities in the aluminum chips are adsorbed onto the drum wall and do not fall into the third screen 213 with the non-magnetic aluminum chips. The iron impurities adsorbed on the drum wall rotate with the rotating drum 33. When they reach the position of the scraper 35, due to the blocking effect of the scraper 35, the iron impurities cannot continue to rotate with the rotating drum 33, but are scraped off and fall into the collection tank 36 under their own gravity. The control system 4 is connected to the rotating drum 33 to comprehensively regulate the rotation speed of the rotating drum 33 based on the feeding speed of the feeding component 2 and the load of the third screen 213. For example, when the feeding speed of the feeding component 1 increases and the load of the third screen 213 is low, the rotation speed of the rotating drum 33 can be appropriately increased. However, it is understandable that in order to ensure the removal rate of iron impurities and reduce the iron content in the aluminum chips, the rotation speed of the rotating drum 33 should not be too fast, and the screening quality of the aluminum chips should be prioritized.

[0037] Among them, see Figure 3 The permanent magnet 34 is a neodymium iron boron permanent magnet.

[0038] Neodymium iron boron (NdFeB) permanent magnets possess extremely high magnetic energy product and coercivity. For the same volume, the magnetic force of NdFeB magnets far surpasses that of traditional ferrite and AlNiCo magnets. A small piece of NdFeB can generate a very strong magnetic field. This implementation utilizes NdFeB permanent magnets, enabling the generation of a sufficiently strong magnetic field within a relatively small magnetic separation component 3, thereby ensuring efficient and reliable adsorption and separation of fine iron impurities mixed in recycled aluminum.

[0039] Among them, see Figure 1 The control system 4 includes a controller, a flow sensor, and multiple weight sensors. The flow sensor is mounted on the feed assembly 1 to detect the real-time flow rate of the feed assembly 1. Each weight sensor is mounted on a screen 21 to monitor the real-time load on the screen 21. The controller is connected to the flow sensor, the multiple weight sensors, the feed assembly 1, and the multiple variable frequency vibration motors 22.

[0040] The control system 4 in this embodiment can monitor the real-time flow rate of the feeding assembly 1 and the real-time load of each screen 21. Based on the monitoring results, it can flexibly adjust the feeding direction of the feeding assembly 1 and the vibration frequency of each screen 21. Through dynamic adjustment, automatic control is achieved, keeping the recycled aluminum screening and separation device in optimal working condition. For example, when the load of the first screen 211 is detected to rise to a preset value, the feeding flow rate of the feeding assembly 1 can be appropriately reduced, and the vibration frequency of the first screen 211 can be increased.

[0041] Among them, see Figure 1 The control system 4 also includes a touch panel. The touch panel is connected to the controller.

[0042] The control system 4 in this implementation uses a PLC controller. Various monitoring data can be displayed in real time via a touch panel, and the screening process can be easily controlled manually.

[0043] Among them, see Figure 1 The vibration frequency of the variable frequency vibration motor 22 is 10-50Hz.

[0044] The frequency of the variable frequency vibration motor 22 is 10-50Hz, providing good adaptability and flexibility. When high-purity aluminum chips of a specific particle size are required, the frequency can be appropriately lowered (e.g., 10-20Hz) to allow the material to remain on the screen 21 for a longer time, enabling more thorough tumbling and screening, ensuring that only particles smaller than the screen openings can pass through, thereby significantly improving sorting accuracy. When the throughput is large and the accuracy requirements are not extremely stringent, the frequency can be increased (e.g., 30-50Hz) to accelerate the movement speed of the material on the screen 21 and increase the throughput per unit time, thus achieving high efficiency.

[0045] Among them, see Figure 1 The screen 21 is made of stainless steel.

[0046] The screen 21 is made of stainless steel, which has the advantages of wear resistance, corrosion resistance, high strength, high rigidity, smoothness and low adhesion. It helps to extend the maintenance cycle, reduce maintenance costs and ensure stability and screening accuracy.

[0047] The structure of the recycled aluminum screening and separation device has been described above. The following section describes the working process of the recycled aluminum screening and separation device: The recycled aluminum raw material is fed into the screening component 2 at a rate of 2-5 tons / hour through the feeding component 1; Start the variable frequency vibration motor 22, set the initial frequency to 30Hz, and drive the multi-layer screen 21 to perform vibration screening; The magnetic separation component 3 is used to adsorb and separate iron impurities from the screened material; The control system 4 monitors the screening status in real time and dynamically adjusts the vibration frequency and feed speed to maintain optimal screening efficiency.

[0048] Using the recycled aluminum screening and separation device of this embodiment, the yield can be increased to over 95%, reducing aluminum chip loss; the quality can also be improved, reducing the impurity content to below 0.5%; at the same time, it can also achieve precision and efficiency optimization, enabling a processing capacity of 8 tons / hour, which is 40% higher than traditional equipment; and through intelligent adjustment, it avoids idling operation, saving 30% of energy consumption; in addition, it simplifies the structure and process, making operation easy and extending the maintenance cycle to 6 months.

[0049] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A recycled aluminum screening and separation device, characterized in that, include: Screening components, magnetic separation components, and control system; The screening assembly is connected to the discharge end of the feeding assembly; the screening assembly includes multiple layers of screens and multiple variable frequency vibration motors; the output end of each variable frequency vibration motor is connected to one of the screens; The magnetic separation component is disposed inside the screening component; The control system is connected to the feeding assembly and the screening assembly respectively; the control system can dynamically adjust the feeding speed of the feeding assembly and the vibration frequency of each variable frequency vibration motor according to the real-time load of each layer of the screen.

2. The recycled aluminum screening and separation device according to claim 1, characterized in that, The feeding assembly includes: a frame, a conveyor belt, a drive motor, and a uniform feeding plate; The frame is equipped with a tension wheel and a drive wheel; The conveyor belt is driven between the tensioning wheel and the drive wheel; The drive motor is connected to the drive wheel to drive the conveyor belt to move toward the screening assembly; The material leveling plate is vertically and vertically positioned above the conveyor belt so that aluminum chips on the conveyor belt fall evenly into the screening assembly. The control system is connected to the drive motor.

3. The recycled aluminum screening and separation device according to claim 2, characterized in that, The end of the conveyor belt closer to the screening assembly is lower than the end of the conveyor belt farther from the screening assembly.

4. The recycled aluminum screening and separation device according to claim 1, characterized in that, The screen includes a first screen, a second screen, and a third screen; the first screen is located directly above the second screen; the third screen is located diagonally below the second screen; the aperture of the screens decreases progressively from top to bottom. The magnetic separation component is disposed between the second screen and the third screen; The aluminum chips screened out by the second screen can fall into the magnetic separation component, and after the magnetic separation component removes iron impurities, they fall onto the third screen.

5. The recycled aluminum screening and separation device according to claim 4, characterized in that, The magnetic separation assembly includes: a support, a guide plate, a rotating drum, a permanent magnet, a scraper, and a collection trough; The guide plate is disposed on the bracket; the guide plate is located below the second screen and above the third screen; the guide plate is inclined toward the third screen; The rotating drum is rotatably mounted on the support; the rotating drum is located between the lowest point of the guide plate and the third screen; the rotating drum rotates from the guide plate toward the third screen; The permanent magnet is disposed in the rotating drum and is used to adsorb iron impurities onto the outer circumferential surface of the rotating drum. The scraper is mounted on the support; along the rotation direction of the rotating drum, the scraper is located downstream of the third screen. The collection trough is located below the rotating drum and is used to collect iron impurities scraped off by the scraper. The control system is connected to the rotating drum to regulate the rotational speed of the rotating drum.

6. The recycled aluminum screening and separation device according to claim 5, characterized in that, The permanent magnet is a neodymium iron boron permanent magnet.

7. The recycled aluminum screening and separation device according to claim 1, characterized in that, The control system includes a controller, a flow sensor, and multiple weight sensors; The flow sensor is mounted on the feeding assembly and is used to detect the real-time flow rate of the feeding assembly. Each of the weight sensors is disposed on one of the screens for monitoring the real-time load on the screen; The controller is connected to the flow sensor, multiple weight sensors, the feeding assembly, and multiple variable frequency vibration motors.

8. The recycled aluminum screening and separation device according to claim 7, characterized in that, The control system also includes a touch panel; the touch panel is connected to the controller.

9. The recycled aluminum screening and separation device according to claim 1, characterized in that, The vibration frequency of the variable frequency vibration motor is 10-50Hz.

10. The recycled aluminum screening and separation device according to claim 1, characterized in that, The screen is made of stainless steel.