A pretreatment device for the production and processing of recycled aluminum

Abstract

The present invention discloses a pretreatment device for the production and processing of recycled aluminum, which relates to the technical field of the production and processing of recycled aluminum and includes a frame. On one side of the top surface of the frame, a processing box is installed. On the other side of the bottom of the frame, a filtering water tank and a receiving box are provided. A feed pipe is arranged on the top surface of the processing box. At the upper end inside the processing box, two crushing rollers are installed, and two feeding guide plates for feeding between the two crushing rollers are symmetrically fixed on the top wall of the inner wall of the processing box. Below the two crushing rollers inside the processing box, a V-shaped diversion plate is provided. Below the V-shaped diversion plate, a metal sieve cylinder is provided. At the bottom walls of both ends of the V-shaped diversion plate, upper baffle plates are hinged. At the top of the metal sieve cylinder, a feed inlet is provided, at the bottom, a non-magnetic discharge port is provided, and on one side in the middle, a magnetic discharge port is provided. The present invention can not only improve the adsorption efficiency of magnetic metals, but also eliminate the need to stop the machine for the separate treatment of the screened magnetic metals, making the preparation and processing of recycled aluminum more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of recycled aluminum production and processing, and in particular to a pretreatment device for recycled aluminum production and processing. Background Art

[0002] Recycled aluminum is aluminum alloy or metal obtained by remelting and refining scrap aluminum, aluminum alloys, or aluminum-containing waste. Recycled aluminum is contaminated to varying degrees during the recycling and disassembly process, and may contain various non-aluminum substances. These inclusions can also undergo physical and chemical reactions during the smelting process, impacting the environment. Therefore, during the production and processing of recycled aluminum, pre-treatment of the scrap aluminum is required to remove these contaminants and eliminate them before smelting.

[0003] Currently, in the pretreatment device for recycled aluminum, such as the pretreatment device for recycled aluminum production and processing disclosed in the authorization announcement number CN111013766B, the work box is provided with a feed port. When sorting the recycled aluminum before processing, especially when sorting the magnetic metal materials sandwiched in the metal aluminum, the magnetic metal is only adsorbed and processed by an electromagnet. First, the adsorption capacity of the electromagnet is limited. After adsorbing a part of the magnetic metal, the adsorbed metal needs to be processed, resulting in the need to stop the entire pretreatment work and wait. At the same time, the adsorption range of the electromagnet is also limited, which easily causes some metals to enter the next step together with the aluminum material, resulting in poor magnetic sorting effect, thereby affecting the purity of the recycled aluminum production and processing. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that magnetic separation effect is poor, thereby affecting the purity of recycled aluminum production and processing, and to propose a pretreatment device for recycled aluminum production and processing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pretreatment device for the production and processing of recycled aluminum, including a frame. On one side of the top surface of the frame, a processing box is installed. On the other side of the bottom of the frame, a filter water tank and a material receiving box are provided. On the top surface of the processing box, a feed pipe is provided. At the upper end inside the processing box, two crushing rollers are installed, and on the top wall of the inner wall of the processing box, two feeding guide plates for feeding between the two crushing rollers are symmetrically fixed. Below the two crushing rollers inside the processing box, a V-shaped diversion plate is provided. Below the V-shaped diversion plate, a metal sieve cylinder is provided. At the bottom walls of both ends of the V-shaped diversion plate, upper baffle plates are hinged. At the top of the metal sieve cylinder, a feed inlet is provided, at the bottom, a non-magnetic discharge port is provided, and on one side in the middle, a magnetic discharge port is provided. On both side walls of the processing box between the metal sieve cylinder and the V-shaped diversion plate, inclined lower baffle plates extending to the feed inlet at the top of the metal sieve cylinder are fixedly installed. A material guiding channel is formed between the upper baffle plate and the corresponding lower baffle plate. At the center inside the metal sieve cylinder, a rotating shaft is provided, and on the outer side of the rotating shaft, a number of electromagnetic plates are installed. When a number of the electromagnetic plates rotate with the rotating shaft to the magnetic discharge port, they are powered off and demagnetized. Below the metal sieve cylinder, a conveying assembly is provided, and one end of the conveying assembly extends out of the processing box to directly above the filter water tank.

[0007] Preferably, on both sides of the bottom surface of the V-shaped diversion plate, electric push rods are hingedly installed, and the bottom ends of the electric push rods are hinged to the top surface of the upper baffle plate.

[0008] Preferably, on one side of the inside of the processing box where the magnetic discharge port is located, an inclined metal discharge plate is provided. In the middle of the side surface of the processing box, a metal discharge port is opened. The bottom end of the metal discharge plate extends to the metal discharge port, and on the top surface of the metal discharge plate, two converging plates are symmetrically provided. The two converging plates are in an eight-shaped configuration and the bottom ends correspond to the metal discharge port.

[0009] Preferably, on one side surface of the outside of the processing box, a first motor connected to one of the crushing rollers is installed, and on the other side surface of the outside of the processing box, a gear transmission member connecting the two crushing rollers is installed.

[0010] Preferably, one end of the roller shaft of the crushing roller not directly connected to the first motor and one end of the rotating shaft both extend out of the processing box to the side surface where the first motor is located, and a chain transmission member is connected between the roller shaft of the crushing roller and the rotating shaft.

[0011] Preferably, on the inner wall of the processing box at one end of the rotating shaft, an annular conductive sheet is fixedly connected, and a number of the electromagnetic plates are externally connected to a power source through the annular conductive sheet.

[0012] Preferably, the conveying assembly includes a conveying frame fixed to the inner bottom end of the processing box and a conveyor belt installed in the conveying frame. A second motor for driving the conveyor belt to rotate is provided on the inner bottom wall of the processing box. The conveying frame is U-shaped, and both side ends of the conveying frame extend above the conveyor belt. A feeding hopper is fixed to the inner wall of the processing box between the metal sieve cylinder and the conveying frame, and the bottom end of the feeding hopper extends to a position close to the conveying frame.

[0013] Preferably, a hydraulic cylinder is provided on the outer side surface of the processing box above the conveyor belt, and a pressing plate corresponding to the width of the conveyor belt is fixedly connected to the bottom of the hydraulic cylinder. A horizontal support backing plate is fixedly connected in the conveying frame, and the support backing plate corresponds vertically to the pressing plate and has the same size.

[0014] Preferably, a blanking port is provided on the top surface of the frame directly below the end of the conveyor belt. The opening of the filtering water tank corresponds to the blanking port. A base for support is provided below the filtering water tank. The receiving box is arranged on one side of the base, and a guide pipe is communicated between the bottom of the filtering water tank and the top of the receiving box.

[0015] Preferably, the guide pipe is a rectangular pipe. The inner bottom wall of the filtering water tank is inclined, and an outlet communicated with the guide pipe is opened at the lowest position of the inclined bottom wall of the filtering water tank. A sealing extraction plate that slides into the outlet is inserted into the top of the filtering water tank.

[0016] The present invention has the following advantages compared with the prior art:

[0017] In the present invention, by arranging a metal sieve cylinder in the processing box and installing a rotating shaft and a plurality of electromagnetic plates in the metal sieve cylinder, when demagnetizing the crushed aluminum recycled raw materials, the magnetic metals are adsorbed by the rotation of the plurality of electromagnetic plates and rotated to the metal discharge port to cut off the magnetic field, realizing the rotary cyclic discharge of the magnetic metals from the metal discharge port. This can not only improve the adsorption efficiency of the magnetic metals but also eliminate the need to stop the machine for separate treatment of the sieved magnetic metals, making the preparation and processing of recycled aluminum more convenient;

[0018] At the same time, the material blocking lower plate on one side of the metal sieve cylinder and the material blocking upper plate above the metal sieve cylinder can block the recycled aluminum materials while forming a rolling channel for the recycled aluminum materials, minimizing the problem that the recycled aluminum materials are concentrated and dropped into the metal sieve cylinder, resulting in untimely screening of the metal sieve cylinder, or the problem that the magnetic metals press the non-magnetic metals during adsorption, causing the non-magnetic metals to roll down together with the magnetic metals, further providing a better environment for the screening of the magnetic metals;

[0019] In addition, a hydraulic cylinder and a pressing plate are installed above the conveyor belt. Through the operation of the hydraulic cylinder, the non-magnetic materials at the conveyor belt above the supporting cushion plate are vertically compacted, so that the aluminum materials enter the filtering water tank after being compacted. At this time, the compacted aluminum materials sink downward in the water tank, and impurities such as plastics float above the water tank, realizing the separation of aluminum in the non-magnetic materials and further improving the purity of the waste aluminum recycled materials. Brief Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0021] Figure 2 It is the front view after cross-section of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0022] Figure 3 It is a schematic structural diagram of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0023] Figure 4 It is a schematic structural diagram of another perspective of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0024] Figure 5 It is a schematic diagram of the energized state of the electromagnetic plate of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0025] Figure 6 It is the front view after cross-section of another perspective of a pretreatment device for recycled aluminum production and processing proposed by the present invention;

[0026] Figure 7 It is the front view after cross-section of the filtering water tank of a pretreatment device for recycled aluminum production and processing proposed by the present invention.

[0027] In the figure: 1, frame; 2, processing box; 3, feed pipe; 4, first motor; 5, chain transmission member; 6, metal discharge port; 7, gear transmission member; 8, guide plate; 9, crushing roller; 10, V-shaped guide plate; 11, upper baffle plate; 12, lower baffle plate; 13, electric push rod; 14, metal sieve cylinder; 15, rotating shaft; 16, electromagnetic plate; 17, metal discharge plate; 18, guide hopper; 19, conveying frame; 20, conveyor belt; 21, hydraulic cylinder; 22, pressing plate; 2, discharge port; 24, base; 25, filtering water tank; 26, receiving box; 27, supporting cushion plate; 28, guide pipe; 29, sealed extraction plate; 30, annular conductive sheet. Detailed Description of the Invention

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] Refer to Figures 1-4 , a pretreatment device for the production and processing of recycled aluminum, including a frame 1. On one side of the top surface of the frame 1, a processing box 2 is installed. On the other side of the bottom of the frame 1, a filter water tank 25 and a material receiving box 26 are provided. On the top surface of the processing box 2, a feed pipe 3 is provided. The feed pipe 3 communicates with the inside of the processing box 2 in the middle of the top surface of the processing box 2. At the upper end inside the processing box 2, two crushing rollers 9 are installed for crushing the initial material, making it more convenient for subsequent sorting. And on the top wall of the inner wall of the processing box 2, two guide plates 8 for feeding materials between the two crushing rollers 9 are symmetrically fixed to ensure that all the initial materials are crushed by the crushing rollers 9. Inside the processing box 2, below the two crushing rollers 9, a V-shaped diversion plate 10 is provided to move the crushed materials to the place near the side wall inside the processing box 2 through the V-shaped diversion plate 10. Below the V-shaped diversion plate 10, a metal sieve cylinder 14 is provided. Both ends of the metal sieve cylinder 14 are fixed on the inner wall of the processing box 2. At the bottom walls of both ends of the V-shaped diversion plate 10, baffle upper plates 11 are hinged. The metal sieve cylinder 14 has a feed inlet at the top, a non-magnetic discharge outlet at the bottom, and a magnetic discharge outlet on one side in the middle. On both side walls of the processing box 2 between the metal sieve cylinder 14 and the V-shaped diversion plate 10, inclined baffle lower plates 12 extending to the feed inlet at the top of the metal sieve cylinder 14 are fixedly installed. A guide channel is formed between the baffle upper plate 11 and the corresponding baffle lower plate 12 for the passage of the crushed materials. And the baffle upper plate 11 can block the upper part of the accumulated materials to separate the materials. In the center of the inside of the metal sieve cylinder 14, a rotating shaft 15 is provided, and a number of electromagnetic plates 16 are installed on the outside of the rotating shaft 15. The number of electromagnetic plates 16 is demagnetized by power-off when rotating to the magnetic discharge outlet along with the rotating shaft 15, so as to screen and discharge the magnetic materials through the magnetic discharge outlet. Below the metal sieve cylinder 14, a conveying assembly is provided. One end of the conveying assembly extends out of the processing box 2 to directly above the filter water tank 25 for subsequent work.

[0031] On both sides of the bottom surface of the V-shaped deflector 10, electric push rods 13 are hingedly installed, and the bottom ends of the electric push rods 13 are hinged to the top surface of the upper material retaining plate 11. The size of the material guiding channel between the upper material retaining plate 11 and the lower material retaining plate 12 can be adjusted by the electric push rods 13 as needed, thereby preventing blockage.

[0032] In order to facilitate the discharge of magnetic metals after sorting, an inclined metal discharge plate 17 is provided inside the processing box 2 on one side of the magnetic discharge port. A metal discharge port 6 is opened in the middle of the side surface of the processing box 2. The bottom end of the metal discharge plate 17 extends to the metal discharge port 6, enabling the magnetic metals to be conveyed to the metal discharge port 6. Moreover, two collecting plates are symmetrically arranged on the top surface of the metal discharge plate 17. The two collecting plates are in a V shape and their bottom ends correspond to the metal discharge port 6, causing the magnetic metals to be discharged concentratedly after screening.

[0033] Refer to Figures 3-4 , a first motor 4 connected to one of the crushing rollers 9 is installed on one side surface of the outside of the processing box 2, and a gear transmission member 7 connecting the two crushing rollers 9 is installed on the other side surface of the outside of the processing box 2, realizing the first motor 4 driving the two crushing rollers 9 to work simultaneously. One end of the roller shaft of the crushing roller 9 not directly connected to the first motor 4 and one end of the rotating shaft 15 both extend out of the processing box 2 to the side surface where the first motor 4 is located, and a chain transmission member 5 is connected between the roller shaft of the crushing roller 9 and the rotating shaft 15, realizing the first motor 4 driving the rotating shaft 15 to work.

[0034] Refer to Figures 1-2 and Figure 5 , an annular conductive sheet 30 is fixedly connected to the inner wall of the processing box 2 at one end of the rotating shaft 15. A plurality of electromagnetic plates 16 are externally connected to a power source through the annular conductive sheet 30. It can be seen from the figure that the shaded part is the energized part and the rest is the de-energized part. When the rotating shaft 15 drives the contact member connected to the electromagnetic plate 16 to rotate to the de-energized part, the electromagnetic plate 16 starts to be de-energized to facilitate the discharge of magnetic metals.

[0035] Refer to Figure 6 , the conveying assembly includes a conveying frame 19 fixed to the bottom end inside the processing box 2 and a conveyor belt 20 installed inside the conveying frame 19. Among them, a second motor for driving the conveyor belt 20 to rotate is provided on the inner bottom wall of the processing box 2. The conveying frame 19 is U-shaped, and both side ends of the conveying frame 19 extend above the conveyor belt 20, realizing the blocking of the materials on the conveyor belt 20 to prevent the materials from rolling out of the conveyor belt 20. Moreover, a material guiding hopper 18 is fixed to the inner wall of the processing box 2 between the metal sieve cylinder 14 and the conveying frame 19. The bottom end of the material guiding hopper 18 extends to be close to the conveying frame 19, facilitating the concentrated dropping of the materials onto the conveyor belt 20.

[0036] On the outer side of the processing box 2 above the conveyor belt 20, a hydraulic cylinder 21 is provided, and a pressing plate 22 corresponding to the width of the conveyor belt 20 is fixedly connected to the bottom of the hydraulic cylinder 21. When the hydraulic cylinder 21 works, the pressing plate 22 presses down on the materials on the conveyor belt 20, thereby pressing the aluminum materials. A horizontal support pad 27 is fixedly connected inside the conveying frame 19 to provide support for the pressing of the pressing plate 22. While ensuring pressing, it reduces the pressure loss on the conveyor belt 20. The support pad 27 is vertically corresponding to the pressing plate 22 and has the same size.

[0037] Refer to Figures 3-4 and Figure 7 , at the end of the conveyor belt 20 directly below the top surface of the frame 1, a blanking port 23 is provided. The opening of the filtering water tank 25 corresponds to the blanking port 23, and all the materials conveyed by the conveyor belt 20 fall into the filtering water tank 25 through the blanking port 23. A base 24 for support is provided below the filtering water tank 25. A receiving box 26 is arranged on one side of the base 24, and a guide pipe 28 is connected between the bottom of the filtering water tank 25 and the top of the receiving box 26. The guide pipe 28 is a rectangular pipe. The inner bottom wall of the filtering water tank 25 is inclined to facilitate the sliding of the sunk aluminum materials on the bottom wall, and an outlet communicating with the guide pipe 28 is opened at the lowest part of the inclined bottom wall of the filtering water tank 25. A sealed extraction plate 29 is slidably inserted into the outlet at the top of the filtering water tank 25. After the sealed extraction plate 29 is pulled out, the aluminum materials enter the receiving box 26 along with the water flow, and a filter plate is provided at the bottom of the receiving box 26 to block the aluminum materials and enable the water to be led out from the bottom of the receiving box 26 through a pipe.

[0038] Working principle: During operation, first start the first motor 4, and pour the recycled aluminum mixed raw materials into the processing tank 2 from the feed pipe 3. At this time, the first motor 4 rotates to drive the two crushing rollers 9 to rotate in opposite directions, and first perform crushing treatment on the raw materials. At the same time, when the first motor 4 rotates, it also drives the rotating shaft 15 to rotate through the chain transmission member 5. The rotating shaft 15 rotates to drive the electromagnet plate 16 to rotate. The crushed raw materials slide downward from the top below the baffle through the V-shaped guide plate 8. The upper baffle plate 11 blocks the raw materials stacked up and down, so that the raw materials slide into the metal sieve cylinder 14 in sequence. In the metal sieve cylinder 14, the magnetic materials are adsorbed by the electromagnet plate 16. During the rotation of the electromagnet plate 16, the non-magnetic materials fall through the non-magnetic discharge port at the bottom of the metal sieve cylinder 14. The magnetic separation materials are continuously driven by the electromagnet plate 16 to rotate until the electromagnet plate 16 moves to the magnetic discharge port, the electromagnet plate 16 loses magnetism, and the magnetic materials adsorbed on the electromagnet plate 16 fall onto the surface of the next electromagnet plate 16 and are adsorbed. Until the next electromagnet plate 16 moves to the magnetic separation discharge port and loses magnetism, at this time, the magnetic materials adsorbed above the electromagnet plate 16 roll out from the magnetic discharge port. The magnetic materials below the electromagnet plate 16 fall again and are adsorbed by the next electromagnet plate 16, and the cycle continues. After the magnetic materials are discharged from the magnetic discharge port, they fall onto the metal discharge plate 17 and finally roll out from the metal discharge port (6) and are collected;

[0039] Meanwhile, the non-magnetic materials fall into the guide hopper 18 after falling out of the metal sieve cylinder 14 and finally fall onto the conveyor belt (20). At this time, start the second motor to drive the conveyor belt (20) to rotate until it is transported below the pressing plate 22, then the second motor pauses, the hydraulic cylinder 21 starts, drives the pressing plate 22 to move downward to press the materials. After the pressing is completed, the hydraulic cylinder 21 rises, and the second motor continues to work until the next group of materials is transported below the pressing plate 22 again for pressing treatment, and the cycle continues. Finally, the pressed materials fall into the filtering water tank 25 through the discharge port 23. In the filtering water tank 25, the aluminum materials sink to the bottom wall of the water tank after being pressed, and impurity materials such as plastics float on the surface of the water tank. The impurities are fished away. When taking out the aluminum materials, pull the sealing draw plate 29 upward, and the aluminum materials will fall into the receiving box 26 along with the water flow and the guide pipe 28 and are collected.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A pretreatment device for the production and processing of recycled aluminum, comprising a frame (1), characterized in that: On one side of the top surface of the frame (1), a processing box (2) is installed. On the other side of the bottom of the frame (1), a filter water tank (25) and a material receiving box (26) are provided. On the top surface of the processing box (2), a feed pipe (3) is provided. At the upper end inside the processing box (2), two crushing rollers (9) are installed, and on the top wall of the inner wall of the processing box (2), two guide plates (8) for feeding materials between the two crushing rollers (9) are symmetrically fixed. Below the two crushing rollers (9) inside the processing box (2), a V-shaped diversion plate (10) is provided. Below the V-shaped diversion plate (10), a metal sieve cylinder (14) is provided. At the bottom walls of both ends of the V-shaped diversion plate (10), a material blocking upper plate (11) is hinged. The metal sieve cylinder (14) has a feed inlet at the top, a non-magnetic discharge outlet at the bottom, and a magnetic discharge outlet on one side in the middle. On both side walls of the processing box (2) between the metal sieve cylinder (14) and the V-shaped diversion plate (10), inclined material blocking lower plates (12) that extend to the feed inlet at the top of the metal sieve cylinder (14) are fixedly installed. A material guiding channel is formed between the material blocking upper plate (11) and the corresponding material blocking lower plate (12). In the center of the inside of the metal sieve cylinder (14), a rotating shaft (15) is provided, and a number of electromagnetic plates (16) are installed on the outer side of the rotating shaft (15). When the number of electromagnetic plates (16) rotate with the rotating shaft (15) to the magnetic discharge outlet, they are powered off and demagnetized. Below the metal sieve cylinder (14), a conveying assembly is provided, and one end of the conveying assembly extends out of the processing box (2) to be directly above the filter water tank (25); On both sides of the bottom surface of the V-shaped diversion plate (10), electric push rods (13) are hingedly installed, and the bottom ends of the electric push rods (13) are hinged to the top surface of the material blocking upper plate (11); On the inner wall of the processing box (2) at one end of the rotating shaft (15), an annular conductive sheet (30) is fixedly connected, and a number of electromagnetic plates (16) are externally connected to a power source through the annular conductive sheet (30).

2. The pretreatment device for recycled aluminum production and processing according to claim 1, characterized in that, On one side of the inside of the processing box (2) where the magnetic discharge outlet is located, an inclined metal discharge plate (17) is provided. In the middle of the side surface of the processing box (2), a metal discharge port (6) is opened. The bottom end of the metal discharge plate (17) extends to the metal discharge port (6), and on the top surface of the metal discharge plate (17), two converging plates are symmetrically provided. The two converging plates are in an eight-shaped configuration and their bottom ends correspond to the metal discharge port (6).

3. A pretreatment device for the production and processing of recycled aluminum according to claim 1, characterized in that, On one side surface of the outside of the processing box (2), a first motor (4) connected to one of the crushing rollers (9) is installed. On the other side surface of the outside of the processing box (2), a gear transmission member (7) connected to the two crushing rollers (9) is installed.

4. The pretreatment device for the production and processing of recycled aluminum according to claim 3, characterized in that, One end of the roller shaft of the crushing roller (9) not directly connected to the first motor (4) and one end of the rotating shaft (15) both extend out of the processing box (2) to the side surface where the first motor (4) is located, and a chain transmission member (5) is connected between the roller shaft of the crushing roller (9) and the rotating shaft (15).

5. The pretreatment device for the production and processing of recycled aluminum according to claim 1, wherein, The conveying assembly includes a conveying frame (19) fixed to the inner bottom end of the processing box (2) and a conveyor belt (20) installed in the conveying frame (19). A second motor for driving the rotation of the conveyor belt (20) is provided on the inner bottom wall of the processing box (2). The conveying frame (19) is U-shaped, and both side ends of the conveying frame (19) extend above the conveyor belt (20). A material guiding hopper (18) is fixed to the inner wall of the processing box (2) between the metal sieve cylinder (14) and the conveying frame (19), and the bottom end of the material guiding hopper (18) extends to a position close to the conveying frame (19).

6. The pretreatment device for recycled aluminum production and processing according to claim 5, characterized in that, A hydraulic cylinder (21) is provided above the conveyor belt (20) on the outer side surface of the processing box (2), and a pressing plate (22) corresponding to the width of the conveyor belt (20) is fixedly connected to the bottom of the hydraulic cylinder (21). A horizontal support pad (27) is fixedly connected in the conveying frame (19), and the support pad (27) is vertically corresponding to the pressing plate (22) and has the same size.

7. A pretreatment device for recycled aluminum production and processing according to claim 6, characterized in that, A material discharging port (23) is provided on the top surface of the frame (1) directly below the end of the conveyor belt (20). The opening of the filtering water tank (25) corresponds to the material discharging port (23). A base (24) for support is provided below the filtering water tank (25). The receiving box (26) is arranged on one side of the base (24), and a material guiding pipe (28) is communicated between the bottom of the filtering water tank (25) and the top of the receiving box (26).

8. A pretreatment device for the production and processing of recycled aluminum according to claim 7, characterized in that, The material guiding pipe (28) is a rectangular pipe. The inner wall bottom of the filtering water tank (25) is inclined, and an outlet communicated with the material guiding pipe (28) is opened at the lowest position of the inclined bottom wall of the filtering water tank (25). A sealing extraction plate (29) inserted into the outlet is slidably connected to the top of the filtering water tank (25).

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