Method and device for recycling, smelting and stir-frying ash of waste aluminum

Abstract

The invention discloses an aluminum scrap recovery smelting ash frying method and device, the device comprises an aluminum melting furnace and an ash frying machine, the aluminum melting furnace and the ash frying machine are arranged in parallel, a trench communicated with the aluminum melting furnace and the ash frying machine is dug in the ground of the front side of the aluminum melting furnace and the ash frying machine, and a flat car capable of translating in the trench is arranged in the trench. An ash containing assembly is placed on the top of the flat trolley and used for containing hot aluminum ash scraped out of the aluminum melting furnace. Lifting assemblies are arranged on the two sides of the ash frying machine and used for lifting the ash containing assembly to an ash pouring opening of the ash frying machine, and hot aluminum ash is poured into the ash frying pan through the ash pouring opening. The hot aluminum ash scraped out of the aluminum melting furnace can be treated in time, the continuity and stability of production are guaranteed, the safety risk in the hot aluminum ash transferring process is reduced, metal is efficiently recycled through the ash frying machine, extra raw materials can be provided for enterprises, and the production efficiency is indirectly improved.

Description

Technical Field

[0001] This invention relates to the field of waste aluminum recycling and refining into recycled aluminum, and in particular to a method and apparatus for smelting and ash-frying waste aluminum. Background Technology

[0002] Aluminum smelting produces a large amount of dross containing metallic aluminum. A slag frying machine processes this dross through mechanical stirring and heating, separating the metallic aluminum particles from ash and other impurities, thus achieving aluminum recycling and reuse, improving aluminum resource utilization, and reducing production costs. If aluminum dross is improperly dumped or disposed of, some of its components may pollute soil and water sources. The slag frying machine stabilizes harmful substances in the dross, reducing its environmental impact. Simultaneously, the reduced volume of remaining ash after metal recovery facilitates subsequent environmental treatment. On aluminum processing production lines, timely dross processing prevents its accumulation from affecting the production process, ensuring continuity and stability. Furthermore, the efficient metal recovery through the slag frying machine provides additional raw materials for enterprises, indirectly improving production efficiency.

[0003] A hot aluminum ash roasting machine is a device that extracts and separates metallic aluminum from aluminum ash. The aluminum slag scraped from the surface of a high-temperature aluminum melting furnace contains a certain proportion of liquid metallic aluminum. This hot aluminum ash is added to the roasting pot of the roasting machine at a relatively fast speed and stirred (the roasting machine is equipped with a stirring mechanism to stir the aluminum ash in the roasting pot). Due to the different physical properties and specific gravities of solid and liquid phases, the metallic aluminum in the hot aluminum ash can gradually sink to the bottom of the pot in liquid form. The bottom of the pot has small holes and a flow channel to catch the high-temperature aluminum liquid flowing out under gravity, thereby separating the ash slag from the aluminum.

[0004] In existing aluminum ash roasting machines, the feed inlet of the roasting pot is at a certain height above the ground. Generally, workers need to operate a loader to pour hot aluminum ash into the roasting pot. Hot aluminum ash is usually very hot (reaching a high temperature of about 700℃), and the temperature of the hot aluminum ash roasting machine is also very high during use. If the worker makes a mistake or the loader malfunctions, causing the hot aluminum ash to be dumped, it may lead to a serious safety accident. Summary of the Invention

[0005] This invention provides a method and apparatus for recycling and smelting waste aluminum and frying ash, which can promptly process the hot aluminum ash scraped out of the aluminum melting furnace, ensure the continuity and stability of production, reduce the safety risks during the transfer of hot aluminum ash, and efficiently recover metals through the ash frying machine, thereby providing enterprises with additional raw materials and indirectly improving production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method for recycling and smelting waste aluminum and frying ash includes an aluminum melting furnace and an ash frying machine. The aluminum melting furnace and the ash frying machine are arranged in parallel, and a trench is dug in front of the furnace and the ash frying machine to connect them. A flatbed trolley that can move horizontally is installed in the trench. An ash-collecting component is placed on the top of the flatbed trolley to collect the hot aluminum ash scraped out of the aluminum melting furnace. Lifting components are provided on both sides of the ash frying machine to lift the ash-collecting component to the ash discharge port of the ash frying machine, and pour the hot aluminum ash into the ash frying pot through the ash discharge port. The method for frying ash includes the following steps: S1. When the aluminum melting furnace melts scrap aluminum in daily production, it will produce a large amount of slag, i.e. hot aluminum ash. At this time, control the flatbed trolley to move the ash-collecting component in the trench to the furnace door of the corresponding aluminum melting furnace. Then open the furnace door and the staff will operate the slag removal device to remove the hot aluminum ash from the aluminum melting furnace and let it fall into the ash-collecting component. S2. When the ash-holding component is full, control the flatbed trolley to move the ash-holding component horizontally in the trench to the ash-discharging port of the corresponding ash-frying machine. At this time, the lifting component is connected to the ash-holding component. Control the lifting component to raise the ash-holding component to the ash-discharging port, and then pour the hot aluminum ash into the ash-frying pot. After the hot aluminum ash is poured out, control the lifting component to reset the ash-holding component. S3. Then repeat steps S1 and S2 until all the hot aluminum ash removed from the aluminum melting furnace is processed. Then close the furnace door and wait for the next slag removal operation. After pouring hot aluminum ash into the ash-frying pot, start the ash-frying machine to heat up the ash-frying pot, and the stirring paddle inside it starts to rotate to stir and fry the hot aluminum ash in the ash-frying pot, extracting aluminum metal from the cold aluminum ash to form molten aluminum. S4. The ash roasting machine is connected to the bins containing cold aluminum ash, coal powder, and heating powder respectively. If it is necessary to increase the temperature again during the ash roasting process, heating powder is added to the ash roasting pot to raise the temperature of the hot aluminum ash and accelerate the formation of molten aluminum. If the temperature in the ash roasting pot is too high, cold aluminum ash is added to the ash roasting pot to lower the temperature of the hot aluminum ash. If the molten aluminum in the ash roasting pot clumps and adheres to the stirring paddle, coal powder is added to the ash roasting pot. When the coal powder comes into contact with the clumps of molten aluminum, the instantaneous heating can break them up. S5. The molten aluminum produced during the ash-frying process is discharged through the outlet at the bottom of the ash-frying pot. A receiving tank is provided below the ash-frying pot and connected to the aluminum melting furnace. The molten aluminum produced during the ash-frying process flows directly back into the aluminum melting furnace. After the ash-frying is completed, the aluminum slag left in the ash-frying pot is discharged through the discharge port on one side of the lower part of the ash-frying pot. A receiving tank is connected to the cold ash bucket. The aluminum slag flows into the cold ash bucket through the receiving tank and is cooled to form cold aluminum ash, which can be reused as raw material in step S4.

[0007] Another objective of this invention is to provide a waste aluminum recycling and smelting ash-making device. The bottom of the trench is equipped with a transverse track and a first electric hinge assembly for driving a flatbed trolley to move horizontally. The ash-collecting assembly includes an L-shaped support, with ash hoppers hinged to both sides of the L-shaped support via hinged lugs. An extended limiting plate is provided at the top edge of the ash hopper's opening, with the front side of the limiting plate abutting against the top of the front side of the L-shaped support. A rotating rod is rotatably mounted on the upper front side of the L-shaped support, with multiple counterweights at the bottom of the rotating rod, and grooved fasteners at both ends. Toothed insert plates are provided at both ends of the upper front side of the ash hopper, engaging with the grooved fasteners to prevent the ash hopper from rotating and tipping over when collecting hot aluminum ash. The lifting assembly includes lifting rails on both sides of the ash-cooking machine, with sliders slidably connected to the lifting rails. The sliders are driven to move up and down by a second electric hinge assembly. A first lever plate is rotatably connected inside the slider, and a crossbeam is connected between the two first lever plates. Connecting recesses are provided on both sides of the crossbeam, which are respectively engaged with connecting toothed blocks at both ends of an L-shaped bracket to connect the L-shaped bracket to the crossbeam for lifting. A baffle is provided at the top of the lifting assembly, which cooperates with the rear end of the first lever plate. After the ash hopper is lifted to the ash discharge port, it drives the crossbeam and the ash hopper to rotate, causing the ash hopper to flip under gravity and pour the hot aluminum ash into the ash-cooking pot.

[0008] Preferably, the bottom ends of the L-shaped bracket are rotatably connected to arc-shaped levers, and an L-shaped buckle is provided at one end of the arc-shaped lever near the L-shaped bracket to fasten the bottom of the connecting recess to prevent the ash-collecting component from falling off during the lifting process.

[0009] Preferably, the lifting track consists of two vertical rails spaced apart, and the slider is mainly composed of two frames connected by a connecting plate and located on the front and rear sides of the vertical rails. Multiple first guide wheels are rotatably arranged inside the frames for sliding cooperation with the vertical rails. The top and bottom of the connecting plate are connected to a second electric hinge assembly to drive the slider to move up and down along the vertical rails. The connecting plate is rotatably connected to a first lever plate through a hinge shaft. The first lever plate passes through the groove in the middle of the frame and the gap between the two vertical rods, and its front end is connected to the crossbeam.

[0010] Preferably, the first lever plate has an end that bends upwards, then bends backwards parallel to the beam, then bends diagonally upwards, and then bends backwards parallel to the beam, dividing it into four sections. The connection between the second and third sections is connected to a hinge shaft. The bottom of the second section fits into the bottom of the groove on the slider. A third guide wheel is rotatably provided at the connection between the third and fourth sections, which slides in cooperation with the rear side of the lifting track. A second guide wheel is rotatably provided at the rear end of the fourth section, which cooperates with a baffle provided at the top of the lifting assembly to drive the first lever plate to rotate.

[0011] Preferably, a reset chain is provided between the ash hopper and the L-shaped support to drive the ash hopper to reset after it has been turned over and dumped.

[0012] Preferably, the bottom of the ash-frying pot is provided with a liquid discharge assembly, which includes a second lever plate rotatably connected to one side of the bottom of the ash-frying pot. One end of the second lever plate is provided with a conical plug for blocking the liquid outlet at the bottom of the ash-frying pot, and the other end is hinged to the output shaft of the cylinder on the frame of the ash-frying machine for driving the second lever plate to swing.

[0013] Preferably, the bottom side of the ash-frying pot is also rotatably provided with an anti-blocking component with the same structure as the liquid discharge component. The anti-blocking component is set at an angle to the liquid discharge component, and the plug on it is longer than that in the liquid discharge component, which is used to poke into the liquid outlet to loosen the aluminum ash and prevent blockage.

[0014] Preferably, a discharge plate is provided on one side of the lower part of the ash-frying pot for opening and closing the discharge port; the discharge plate is provided on the rotating shaft, and the driving element connected to the end of the rotating shaft is a motor or an eccentric plate hinged to the cylinder, for driving the rotating shaft and the discharge plate to rotate.

[0015] Preferably, the ash discharge plate is equipped with a temperature probe for measuring the temperature inside the ash-frying pot, and avoids being directly placed inside the ash-frying pot as it is easily damaged.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can promptly process the hot aluminum ash scraped out of the aluminum melting furnace, ensuring the continuity and stability of production, reducing the safety risks during the transfer of hot aluminum ash, and efficiently recovering metal through the ash-frying machine, which can provide enterprises with additional raw materials and indirectly improve production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 for Figure 1 Enlarged diagram of A in the middle; Figure 3 This is a schematic diagram of the left-side structure of the flatbed trolley and the ash-collecting component in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the L-shaped buckle plate fastening the connecting recess in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure in an embodiment of the present invention where the L-shaped buckle plate is detached from the connecting recess; Figure 6 This is a schematic diagram of the installation structure of the first lever plate in an embodiment of the present invention; Figure 7 This is a top view of the first lever plate, lifting track, and slider in an embodiment of the present invention. Figure 8This is a schematic diagram of the switching structure of the liquid outlet and material outlet of the ash-frying pot in an embodiment of the present invention.

[0018] In the diagram: 1. Aluminum melting furnace; 2. Ash roasting machine; 201. Ash roasting pot; 3. Ash discharge port; 4. Trench; 5. Horizontal moving track; 6. First electric hinge assembly; 7. Lifting track; 8. Slider; 801. Connecting plate; 802. Groove; 803. First guide wheel; 9. First lever plate; 901. Second guide wheel; 902. Third guide wheel; 903. Hinge shaft; 10. Crossbeam; 11. Connecting recess; 12. Flatbed trolley; 1 3. L-shaped bracket, 14. Connecting toothed block, 15. Ash hopper, 16. Rotating rod, 17. Counterweight block, 18. Grooved buckle plate, 19. Toothed insert plate, 20. Hinge ear seat, 21. Limiting plate, 22. Reset chain, 23. Arc-shaped lever, 24. L-shaped buckle plate, 25. Second electric hinge assembly, 26. Cylinder, 27. Second lever plate, 28. Plug, 29. Ash discharge plate, 30. Rotating shaft, 31. Temperature probe. Detailed Implementation

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figure 1-8As shown, this embodiment of the invention includes an aluminum melting furnace 1 and a ash-frying machine 2, which are arranged in parallel. A trench 4, excavated in front of the furnace 1 and the ash-frying machine 2, is connected to the furnace 1 and the ash-frying machine 2. A flatbed trolley 12, capable of horizontal movement, is installed in the trench 4. An ash-collecting component is placed on top of the flatbed trolley 12 to collect the hot aluminum ash scraped from the furnace 1. Lifting components are provided on both sides of the ash-frying machine 2 to lift the ash-collecting component to the ash-pouring port 3 of the ash-frying machine 2, and pour the hot aluminum ash into the ash-frying pot 201 through the ash-pouring port 3. A transverse track 5 and a first electric hinge assembly 6 are provided at the bottom of the trench 4 for... The moving flatbed trolley 12 moves horizontally; the ash-collecting assembly includes an L-shaped bracket 13, with ash-collecting hoppers 15 hinged to both sides of the L-shaped bracket 13 via hinged lugs 20. An extended limiting plate 21 is provided at the edge of the top opening of the ash-collecting hopper 15. The front side of the limiting plate 21 abuts against the top front side of the L-shaped bracket 13. A rotating rod 16 is rotatably provided on the upper front side of the L-shaped bracket 13. Multiple counterweights 17 are provided at the bottom of the rotating rod 16, and grooved buckle plates 18 are provided at both ends of the rotating rod 16. Toothed insert plates 19 are provided at both ends of the upper front side of the ash-collecting hopper 15, which are engaged with the grooved buckle plates 18 to prevent the ash-collecting hopper 15 from rotating and tipping over when collecting hot aluminum ash. The lifting assembly includes lifting rails 7 on both sides of the ash-frying machine 2, with sliders 8 slidably connected to the lifting rails 7. The sliders 8 are driven to move up and down by a second electric hinge assembly 25. A first lever plate 9 is rotatably connected inside the slider 8. A crossbeam 10 is connected between the two first lever plates 9. Connecting recesses 11 are provided on both sides of the crossbeam 10, which are respectively engaged with connecting toothed blocks 14 at both ends of the L-shaped bracket 13 to connect the L-shaped bracket 13 and the crossbeam 10 to drive them to be lifted. A baffle is provided at the top of the lifting assembly, which cooperates with the rear end of the first lever plate 9. After the ash hopper 15 is lifted to the ash pouring port 3, it drives the crossbeam 10 and the ash hopper 15 to rotate, so that the ash hopper 15 flips under the action of gravity and pours the hot aluminum ash into the ash-frying pot 201.

[0022] Preferably, the bottom ends of the L-shaped bracket 13 are rotatably connected to arc-shaped levers 23, and the end of the arc-shaped lever 23 near the L-shaped bracket 13 is provided with an L-shaped buckle plate 24, which is used to fasten the bottom of the connecting recess 11 to prevent the dust-collecting component from falling off during the lifting process.

[0023] Preferably, the lifting track 7 consists of two vertical rails spaced apart. The slider 8 is mainly composed of two frames connected by a connecting plate 801 on the front and rear sides of the vertical rail. Multiple first guide wheels 803 are rotatably arranged inside the frames for sliding cooperation with the vertical rail. The top and bottom of the connecting plate 801 are connected to the second electric hinge assembly 25 to drive the slider 8 to move up and down along the vertical rail. The connecting plate 801 is rotatably connected to the first lever plate 9 through the hinge shaft 903. The first lever plate 9 passes through the groove 802 in the middle of the frame and the gap between the two vertical rods, and its front end is connected to the crossbeam 10.

[0024] Preferably, the first lever plate 9 has an end that bends upwards, then bends backwards parallel to the beam 10, then bends diagonally upwards, and then bends backwards parallel to the beam 10. It is divided into four sections. The connection between the second and third sections is connected to the hinge shaft 903. The bottom of the second section fits into the bottom of the groove 802 on the slider 8. A third guide wheel 902 is rotatably provided at the connection between the third and fourth sections. It slides in cooperation with the rear side of the lifting track 7. A second guide wheel 901 is rotatably provided at the rear end of the fourth section. It cooperates with the baffle provided at the top of the lifting assembly to drive the first lever plate 9 to rotate.

[0025] Preferably, a reset chain 22 is provided between the ash hopper 15 and the L-shaped support 13 to drive the ash hopper 15 to reset after it has been turned over and dumped.

[0026] Preferably, the bottom of the ash-frying pot 201 is provided with a liquid discharge assembly, which includes a second lever plate 27 rotatably connected to one side of the bottom of the ash-frying pot 201. One end of the second lever plate 27 is provided with a conical plug 28 for blocking the liquid outlet at the bottom of the ash-frying pot 201, and the other end is hinged to the output shaft of the cylinder 26 on the frame of the ash-frying machine 2 for driving the second lever plate 27 to swing.

[0027] As a preferred embodiment, the bottom side of the ash-frying pot 201 is also equipped with an anti-blocking component with the same structure as the liquid discharge component. The anti-blocking component is set at an angle to the liquid discharge component, and the plug on it is longer than that in the liquid discharge component, which is used to poke into the liquid outlet to loosen the aluminum ash and prevent blockage.

[0028] Preferably, a discharge plate 29 is provided on one side of the lower part of the ash-frying pot 201 for opening and closing the discharge port; the discharge plate 29 is provided on the rotating shaft 30, and the driving element connected to the end of the rotating shaft 30 is an eccentric plate hinged to the cylinder for driving the rotating shaft 30 and the discharge plate 29 to rotate.

[0029] Preferably, the ash discharge plate 29 is equipped with a temperature probe 31 to measure the temperature inside the ash-cooking pot 201, and to avoid direct placement inside the ash-cooking pot 21 which could easily cause damage.

[0030] The method of frying ash includes the following steps: S1. When the aluminum melting furnace 1 melts scrap aluminum in daily production, it will produce a large amount of slag, i.e. hot aluminum ash. At this time, the first electric hinge assembly 6 is started, which drives the flatbed trolley 12 to move along the transverse track 5. The flatbed trolley 12 drives the ash-collecting assembly to move horizontally in the trench 4 to the furnace door of the corresponding aluminum melting furnace 1. Then the furnace door is opened, and the staff operates the slag removal device to remove the hot aluminum ash from the aluminum melting furnace 1 and let it fall into the ash-collecting hopper 15 of the ash-collecting assembly. S2. When the ash hopper 15 is full, the first electric hinge assembly 6 is controlled to move the flatbed trolley 12, thereby moving the ash-collecting assembly horizontally within the trench 4 to the corresponding ash-discharging port 3 of the ash-frying machine 2. At this time, the connecting teeth 14 on both sides of the ash hopper 15 engage with the connecting recesses 11 in the crossbeam 10, connecting the ash-collecting assembly with the lifting assembly. The second electric hinge assembly 25 in the lifting assembly is then activated, causing the slider 8 to move upward along the lifting track 7. This, in turn, causes the crossbeam 10 and the ash-collecting assembly to rise via the first lever plate 9, causing the ash-collecting assembly to detach from the flatbed trolley 12. At this time, the arc-shaped lever 23 and the L-shaped buckle 24 rotate downward under gravity, and the L-shaped buckle 24 hooks onto the bottom of the connecting recess 11, thus further preventing the ash-collecting assembly from falling during the lifting process and causing a safety accident. When the ash-collecting assembly rises to the ash-discharging port 3, the second guide wheel 901 at the rear end of the first lever plate 9 and... When the baffle contacts the slider 8, the first lever plate 9 rotates as the slider 8 continues to move upward. The front end of the lever plate tilts up, causing the crossbeam 10 and the ash-holding component on it to flip. Under the action of gravity, the counterweight 17 drives the rotating rod 16 to rotate, causing the grooved buckle plate 18 to disengage from the toothed insert plate 19. In this way, the ash-holding hopper 15 can flip along the hinge ear seat 20 to pour the hot aluminum ash into the ash-frying pot 201. After the hot aluminum ash is poured out, the second electric hinge assembly 25 is controlled to drive the slider 8 to move downward. Under the action of gravity and the reset chain 22, the ash-holding hopper 15 flips and resets. The toothed insert plate 19 is inserted into the grooved buckle plate 18 again to prevent the ash-holding hopper 15 from flipping. When the bottom end of the arc-shaped lever 23 contacts the flat trolley 12, the arc-shaped lever 23 rotates upward, causing the L-shaped buckle plate 24 to rotate upward and disengage from the connecting recess 11. In this way, the ash-holding component can be placed on the flat trolley 12 without affecting the subsequent lateral movement. S3. Then repeat steps S1 and S2 until all the hot aluminum ash removed from the aluminum melting furnace 1 is processed. Then close the furnace door of the aluminum melting furnace 1 and wait for the next slag removal operation. After pouring hot aluminum ash into the ash-frying pot 201, start the ash-frying machine 2 to heat up the ash-frying pot 201, and the stirring paddle inside it starts to rotate to stir and fry the hot aluminum ash in the ash-frying pot 201, and extract the aluminum metal from the cold aluminum ash to form aluminum liquid. S4. The ash roasting machine 2 is connected to the bins containing cold aluminum ash, coal powder, and heating powder respectively. If it is necessary to increase the temperature again during the ash roasting process, heating powder is added to the ash roasting pot 201 to raise the temperature of the hot aluminum ash and accelerate the formation of molten aluminum. If the temperature in the ash roasting pot 201 is too high, cold aluminum ash is added to the ash roasting pot 201 to lower the temperature of the hot aluminum ash. If the molten aluminum in the ash roasting pot 201 clumps and adheres to the stirring paddle, coal powder is added to the ash roasting pot 201. When the coal powder comes into contact with the clumps of molten aluminum, the instantaneous heating can break them up. S5. The molten aluminum produced during the ash-frying process is discharged through the outlet at the bottom of the ash-frying pot 201. A receiving trough connected to the aluminum melting furnace 1 is located below the ash-frying pot 201. The molten aluminum produced during the ash-frying process flows directly back into the aluminum melting furnace 1. Activating the discharge assembly causes the cylinder 26 to contract, rotating the second lever plate 27 and disengaging the plug 28 from the outlet, allowing the molten aluminum to be discharged. When the outlet is blocked, first activate the discharge assembly's cylinder 26 to contract, disengaging the plug 28 from the outlet. Then, activate the anti-blocking assembly's cylinder 26 to extend, causing a longer plug inside to... The head 28 is inserted into the liquid outlet, and the cylinder 26 is controlled to contract. This process is repeated multiple times to clear the blockage of aluminum ash at the liquid outlet. After the ash is heated, the aluminum slag left in the ash-heating pot 201 is discharged through the discharge port set on one side of the lower part of the ash-heating pot 201. The discharge port is connected to the receiving trough and is connected to the cold ash bucket. The aluminum slag flows into the cold ash bucket through the receiving trough and cools to form cold aluminum ash, which can be reused as raw material in step S4. The cylinder extends or contracts, causing the eccentric plate to swing, which in turn causes the rotating shaft 30 to rotate, causing the ash discharge plate 29 to rotate, thereby opening or closing the discharge port.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for recycling and smelting scrap aluminum to produce ash, characterized in that: The device includes an aluminum melting furnace and a ash-frying machine, which are arranged in parallel. A trench is dug in front of the furnace and the ash-frying machine, connecting them. A flatbed trolley that can move horizontally is installed in the trench. An ash-collecting component is placed on top of the flatbed trolley to collect the hot aluminum ash scraped out of the aluminum melting furnace. Lifting components are installed on both sides of the ash-frying machine to lift the ash-collecting component to the ash-pouring port of the ash-frying machine, and pour the hot aluminum ash into the ash-frying pot through the ash-pouring port. The ash-frying method includes the following steps: S1. When the aluminum melting furnace melts scrap aluminum in daily production, it will produce a large amount of slag, i.e. hot aluminum ash. At this time, control the flatbed trolley to move the ash-collecting component in the trench to the furnace door of the corresponding aluminum melting furnace. Then open the furnace door and the staff will operate the slag removal device to remove the hot aluminum ash from the aluminum melting furnace and let it fall into the ash-collecting component. S2. When the ash-holding component is full, control the flatbed trolley to move the ash-holding component horizontally in the trench to the ash-discharging port of the corresponding ash-frying machine. At this time, the lifting component is connected to the ash-holding component. Control the lifting component to raise the ash-holding component to the ash-discharging port, and then pour the hot aluminum ash into the ash-frying pot. After the hot aluminum ash is poured out, control the lifting component to reset the ash-holding component. S3. Then repeat steps S1 and S2 until all the hot aluminum ash removed from the aluminum melting furnace is processed. Then close the furnace door and wait for the next slag removal operation. After pouring hot aluminum ash into the ash-frying pot, start the ash-frying machine to heat up the ash-frying pot, and the stirring paddle inside it starts to rotate to stir and fry the hot aluminum ash in the ash-frying pot, extracting aluminum metal from the cold aluminum ash to form molten aluminum. S4. The ash roasting machine is connected to the bins containing cold aluminum ash, coal powder, and heating powder respectively. If it is necessary to increase the temperature again during the ash roasting process, heating powder is added to the ash roasting pot to raise the temperature of the hot aluminum ash and accelerate the formation of molten aluminum. If the temperature in the ash roasting pot is too high, cold aluminum ash is added to the ash roasting pot to lower the temperature of the hot aluminum ash. If the molten aluminum in the ash roasting pot clumps and adheres to the stirring paddle, coal powder is added to the ash roasting pot. When the coal powder comes into contact with the clumps of molten aluminum, the instantaneous heating can break them up. S5. The molten aluminum produced during the ash-frying process is discharged through the outlet at the bottom of the ash-frying pot. A receiving tank is provided below the ash-frying pot and connected to the aluminum melting furnace. The molten aluminum produced during the ash-frying process flows directly back into the aluminum melting furnace. After the ash-frying is completed, the aluminum slag left in the ash-frying pot is discharged through the discharge port on one side of the lower part of the ash-frying pot. A receiving tank is connected to the cold ash bucket. The aluminum slag flows into the cold ash bucket through the receiving tank and is cooled to form cold aluminum ash, which can be reused as raw material in step S4.

2. A waste aluminum recycling and smelting ash-frying device, characterized in that: The bottom of the trench is equipped with a transverse track and a first electric hinge assembly for driving the flatbed trolley to move horizontally; the ash-collecting assembly includes an L-shaped bracket, with ash-collecting hoppers hinged to both sides of the L-shaped bracket via hinged lugs. An extended limiting plate is provided at the edge of the top opening of the ash-collecting hopper, with the front side of the limiting plate abutting against the top of the front side of the L-shaped bracket. A rotating rod is rotatably provided on the upper front side of the L-shaped bracket, with multiple counterweights at the bottom of the rotating rod, and grooved buckles at both ends of the rotating rod. Toothed insert plates are provided at both ends of the upper front side of the ash-collecting hopper, which engage with the grooved buckles to prevent the ash-collecting hopper from rotating and tipping over when collecting hot aluminum ash. The lifting assembly includes lifting rails on both sides of the ash-cooking machine, with sliders slidably connected to the lifting rails. The sliders are driven to move up and down by a second electric hinge assembly. A first lever plate is rotatably connected inside the slider, and a crossbeam is connected between the two first lever plates. Connecting recesses are provided on both sides of the crossbeam, which are respectively engaged with connecting toothed blocks at both ends of an L-shaped bracket to connect the L-shaped bracket to the crossbeam for lifting. A baffle is provided at the top of the lifting assembly, which cooperates with the rear end of the first lever plate. After the ash hopper is lifted to the ash discharge port, it drives the crossbeam and the ash hopper to rotate, causing the ash hopper to flip under gravity and pour the hot aluminum ash into the ash-cooking pot.

3. The waste aluminum recycling and smelting ash-frying device according to claim 2, characterized in that: The bottom ends of the L-shaped bracket are rotatably connected to arc-shaped levers. An L-shaped buckle is provided at the end of the arc-shaped lever near the L-shaped bracket to hold the bottom of the connecting recess and prevent the ash-collecting component from falling off during the lifting process.

4. The waste aluminum recycling and smelting ash-frying device according to claim 2, characterized in that: The lifting track consists of two vertical rails spaced apart. The slider is mainly composed of two frames connected by a connecting plate and located on the front and rear sides of the vertical rails. Multiple first guide wheels are rotatably arranged inside the frames for sliding cooperation with the vertical rails. The top and bottom of the connecting plate are connected to a second electric hinge assembly to drive the slider to move up and down along the vertical rails. The connecting plate is rotatably connected to a first lever plate through a hinge shaft. The first lever plate passes through the groove in the middle of the frame and the gap between the two vertical rods, and its front end is connected to the crossbeam.

5. The waste aluminum recycling and smelting ash-frying device according to claim 4, characterized in that: The first lever plate has an end that bends upwards, then bends backwards parallel to the beam, then bends diagonally upwards, and then bends backwards parallel to the beam. It is divided into four sections. The connection between the second and third sections is connected to a hinge shaft. The bottom of the second section fits into the bottom of the groove on the slider. A third guide wheel is rotatably installed at the connection between the third and fourth sections, which slides in cooperation with the rear side of the lifting track. A second guide wheel is rotatably installed at the rear end of the fourth section, which cooperates with a baffle installed on the top of the lifting assembly to drive the first lever plate to rotate.

6. The waste aluminum recycling and smelting ash-frying device according to claim 2, characterized in that: A reset chain is provided between the ash hopper and the L-shaped support to drive the ash hopper to reset after it has been turned over and dumped.

7. The waste aluminum recycling and smelting ash-frying device according to claim 2, characterized in that: The bottom of the ash-frying pot is equipped with a liquid discharge assembly, which includes a second lever plate rotatably connected to one side of the bottom of the ash-frying pot. One end of the second lever plate is equipped with a conical plug for blocking the liquid outlet at the bottom of the ash-frying pot, and the other end is hinged to the output shaft of the cylinder on the frame of the ash-frying machine for driving the second lever plate to swing.

8. The waste aluminum recycling and smelting ash-frying device according to claim 7, characterized in that: The bottom side of the ash-frying pot is also equipped with an anti-clogging component with the same structure as the liquid discharge component. The anti-clogging component is set at an angle to the liquid discharge component, and the plug on it is longer than that in the liquid discharge component, which is used to poke into the liquid outlet to loosen the aluminum ash and prevent clogging.

9. The waste aluminum recycling and smelting ash-frying device according to claim 8, characterized in that: The lower side of the ash-frying pot is provided with an ash-discharging plate for opening and closing the discharge port; the ash-discharging plate is set on a rotating shaft, and the driving element connected to the end of the rotating shaft is a motor or an eccentric plate hinged to a cylinder, which is used to drive the rotating shaft and the ash-discharging plate to rotate.

10. The waste aluminum recycling and smelting ash-frying device according to claim 9, characterized in that: The ash discharge plate is equipped with a temperature probe to measure the temperature inside the ash-frying pot, and to avoid direct placement inside the ash-frying pot which could easily cause damage.

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