A system for separating and melting waste lead grids in recycling of waste lead-acid batteries

Abstract

The application belongs to the technical field of lead-acid battery recycling, and discloses a separation and melting system for waste lead grid in waste lead-acid battery recycling. The separation and melting system for waste lead grid in waste lead-acid battery recycling comprises a smelting device and a transfer bucket, the transfer bucket is arranged on one side of the smelting device, and further comprises a gas supply mechanism and a screening and feeding mechanism. The separation and melting system for waste lead grid in waste lead-acid battery recycling adopts an integrated impurity removal structure of extrusion and vibration, the waste lead grid is extruded and deformed by the extrusion roller and the extrusion structure on the plate chain, the lead oxide dross, residual lead paste and fine plastic impurities attached to the surface of the lead grid are efficiently stripped, the angle of the material is turned over by cooperating with the vibration assembly, meanwhile, the screening assembly can automatically screen and separate the solid impurities from the qualified lead grid material, the whole process is mechanized operation, the waste slag entering the furnace is reduced, and the dross generated during lead smelting is reduced at the source.

Description

Technical Field

[0001] This invention relates to the technical field of lead-acid battery recycling, specifically to a separation and melting system for waste lead grids in the recycling of waste lead-acid batteries. Background Technology

[0002] Lead-acid batteries are the world's largest-produced and consumed batteries, consuming over 85% of global lead resources. More than 90% of the raw materials for recycled lead production come from waste lead-acid batteries, highlighting the urgent need for recycling and disposal. Waste lead-acid batteries mainly consist of four components: waste electrolyte, lead alloy plates, plastic casings, and separators. After crushing and sorting, approximately 25% of the waste lead grids and other materials can be produced. The conventional particle size for crushing and recycling waste lead grids is controlled between 2mm and 8mm. The lead grids are then separated from plastics and lead paste through hydraulic or heavy media separation. The treated lead grids have high moisture content, and direct smelting can easily cause explosions and increase smelting energy consumption. The lead oxide slag produced by smelting grid impurities often relies on manual removal, which involves high-temperature, high-intensity work, low efficiency, and incomplete slag removal. The removal process also easily generates dust and lead vapor, endangering worker health. Furthermore, the copper terminals of the battery posts are difficult to separate from the lead grids, and manual sorting cannot achieve large-scale operations. Copper impurities are mixed into the crude lead, wasting resources and significantly increasing the cost of lead refining production. Summary of the Invention

[0003] The purpose of this invention is to provide a separation and melting system for waste lead grids in the recycling of waste lead-acid batteries, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a separation and melting system for waste lead grids in the recycling of waste lead-acid batteries, comprising a smelting device and a transfer tank, wherein the transfer tank is disposed on one side of the smelting device, and further comprising a gas supply mechanism and a screening and feeding mechanism. The gas supply mechanism is disposed on the upper side of the smelting device, and uses the heat of the smelting device to heat the gas flow into the transfer tank to dry the material. The screening and feeding mechanism is disposed between the transfer tank and the smelting device for conveying the waste lead grids into the smelting device, and the discharge port of the transfer tank is located on the upper side of the screening and feeding mechanism.

[0005] The screening and feeding mechanism includes a conveyor frame, conveyor discs, a plate chain, an extrusion block, a pad, a mounting frame, an extrusion roller, a drive motor, an extrusion bar, a vibration assembly, and a screening assembly. The conveyor frame is located between the transfer tank and the melting device. Two sets of conveyor discs are respectively installed on both sides of the conveyor frame, and the two sets of conveyor discs are connected by a plate chain drive. The outer side of the plate chain is fixedly connected to an extrusion block arranged at equal intervals. Two pads are also installed on the conveyor frame, located on the left and right sides of the plate chain, with the upper surface of the pads contacting the inner side of the plate chain to provide support. The mounting frame is fixedly installed on the upper side of the conveyor frame. The pressure rollers are movably installed on the left and right sides of the mounting frame. The two pressure rollers are connected by belt drive. A drive motor is installed on the mounting frame, and the output end of the drive motor is fixedly connected to any one of the pressure rollers to drive its rotation. The side wall of the pressure roller is fixedly connected with annularly arranged pressure strips, and the axial direction of the pressure strips is consistent with the axial direction of the pressure roller. The pressure strips on the pressure roller mesh with the pressure block on the plate chain to drive the plate chain to move. A vibration component is also set on the conveyor frame and in the middle of the plate chain to vibrate and remove impurities from the material on the plate chain. A screening component is set on the side of the conveyor frame near the smelting device to screen out impurities in the material.

[0006] Preferably, the transfer barrel includes a barrel body, a feeding hopper, a discharge pipe, a second drive motor, a conveyor shaft, spiral blades, vent holes, and a waste discharge pipe. The feeding hopper is fixedly connected to the top wall of the barrel body, and the discharge pipe is fixedly connected to the middle of the bottom wall of the barrel body, with the discharge port of the discharge pipe pointing towards the side of the upper surface of the plate chain away from the smelting device. The second drive motor is fixedly installed in the middle of the top wall of the barrel body. The conveyor shaft is located inside the barrel body, and its top end is movably connected to the middle of the top wall of the barrel body and fixedly connected to the output end of the second drive motor. The spiral blades are fixedly connected to the conveyor shaft and located inside the barrel body, with evenly distributed vent holes on the spiral blades. The waste discharge pipe is fixedly connected to the top wall of the barrel body to discharge waste gas from the transfer barrel. The air outlet of the air supply mechanism is fixedly connected to the bottom wall of the barrel body, using the hot air introduced through it to dry the material.

[0007] Preferably, the gas supply mechanism includes a blower and a heat exchange tube. The blower is installed outside the smelting device, and the heat exchange tube is in a continuous S-shape and is installed on the upper side of the furnace body of the smelting device by a bracket. Both ends of the heat exchange tube extend outward and are fixedly connected to the gas outlet end of the blower and the bottom wall of the barrel, respectively.

[0008] Preferably, the vibration assembly includes a vibration motor, a transmission rod, and a transmission wheel. The vibration motor is mounted on the conveyor frame and located inside the plate chain. Several transmission rods are mounted on the upper side of the housing of the vibration motor. One end of each transmission rod extends into the plate chain and is movably connected to a transmission wheel, and the transmission wheel is in contact with the inner side of the plate chain.

[0009] Preferably, the screening assembly includes a screening frame, a screen, a second vibrating motor, and a screening hopper. The screening frame is installed on the side of the conveyor frame near the smelting device. The screen is installed on the screening frame to receive the material falling from the plate chain conveyor, and the screen is inclined towards the furnace opening of the smelting device. The second vibrating motor is installed on the screening frame. The screening hopper is located inside the furnace of the smelting device and is hung on the edge of the furnace body of the smelting device through a hook on its back side, and is located below the material falling point of the screen.

[0010] Preferably, it also includes a waste bin, which is located below the screen and is used to recover impurities screened out of the material.

[0011] Preferably, a plurality of extrusion blocks II are arranged at equal intervals between adjacent extrusion bars, and the gaps between the extrusion blocks II and the adjacent extrusion blocks I on the plate chain are opposite to cooperate in extruding materials.

[0012] Preferably, the diameter of the spiral blade is slightly smaller than the inner diameter of the barrel to prevent material from passing through the gap between the spiral blade and the inner wall of the barrel.

[0013] Preferably, an isolation net is movably connected to the middle of one side of the inner wall of the screening hopper, and a limit block is fixedly connected to the other side of the inner wall of the screening hopper at the position corresponding to the isolation net. One end of a steel wire rope is fixedly connected to the isolation net at a position away from its connection with the screening hopper. By pulling the isolation net up with the steel wire rope so that it is parallel to the bottom of the screening hopper, the screening hopper can be divided into upper and lower parts.

[0014] By adopting the aforementioned technical solution, the beneficial effects of the present invention are: 1. The waste lead grid separation and melting system in the waste lead-acid battery recycling process adopts an integrated impurity removal structure that combines extrusion and vibration. The waste lead grid is extruded and deformed by the extrusion rollers and the extrusion structure on the plate chain, which efficiently removes the lead oxide slag, residual lead paste and fine plastic impurities attached to the surface of the lead grid. The vibration component realizes the angle flipping of the material. At the same time, the matching screening component can automatically screen and separate solid impurities from qualified lead grid material. The whole process is mechanized, reducing the waste slag entering the furnace and reducing the slag generated during lead smelting at the source.

[0015] 2. The waste lead grid separation and melting system in this waste lead-acid battery recycling process, with its gas supply mechanism and transfer tank working together, can utilize the waste heat generated by the smelting device to heat the airflow, eliminating the need for additional heating equipment. This effectively recovers and utilizes industrial waste heat, reducing equipment energy consumption and production costs. The high-temperature hot air can dry and dehumidify the sorted wet waste lead grid, solving the safety hazards of boiling and explosion that are easily generated by direct smelting of traditional wet materials. At the same time, it significantly reduces heat loss in the smelting process and improves smelting efficiency. The water vapor and trace amounts of harmful waste gas generated during the drying process can be centrally discharged through the waste exhaust pipe, avoiding air pollution in the workshop.

[0016] 3. The separation and melting system for waste lead grids in this waste lead-acid battery recycling process, through a split structure with an openable and closable isolation net built into the screen hopper, can quickly achieve the layered separation of copper terminals, oxide slag, and molten crude lead after smelting. It accurately recovers copper metal resources mixed in the lead grid, avoids copper impurities from being mixed into the crude lead product, significantly reduces the impurity removal cost of subsequent lead refining, and at the same time achieves centralized collection and treatment of waste slag. It has a high material recovery rate and excellent resource utilization rate, and can be adapted to large-scale and automated waste lead-acid battery recycling production lines.

[0017] 4. The waste lead grid separation and melting system in the waste lead-acid battery recycling process has a strong overall linkage structure. It relies on the residual heat of the equipment's own smelting to dry the material and relies on mechanical extrusion and vibration to achieve fully automatic impurity removal and screening. All mechanisms work together, resulting in high equipment stability and low failure rate. This significantly improves the automation level of waste lead grid separation and melting, adapts to the needs of continuous industrial production, and effectively solves the pain points of traditional processes, such as high difficulty in large-scale operation, low production efficiency, and serious resource waste. Attached Figure Description

[0018] Figure 1 This invention is three-dimensional. Figure 1 ; Figure 2 This invention is three-dimensional. Figure 2 ; Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 3 AA section diagram; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a partial cross-sectional view of the transfer barrel in this invention; Figure 7 This is a schematic diagram of the mounting bracket of the present invention; Figure 8 This is a schematic diagram of the structure of the sieve hopper of the present invention.

[0019] In the diagram: 1. Smelting device; 2. Transfer drum; 21. Drum body; 22. Feed hopper; 23. Discharge pipe; 24. Drive motor II; 25. Conveyor shaft; 26. Spiral blades; 27. Vent hole; 28. Waste discharge pipe; 3. Air supply mechanism; 31. Blower; 32. Heat exchange tube; 4. Screening and feeding mechanism; 41. Conveyor frame; 42. Vibration assembly; 421. Vibration motor I; 422. Conductor rod; 4 23. Conduction wheel; 43. Screening assembly; 431. Screening frame; 432. Screen mesh; 433. Vibrating motor II; 434. Screening hopper; 44. Conveyor disc; 45. Plate chain; 46. Extrusion block I; 47. Pad plate; 48. Mounting frame; 49. Extrusion roller; 410. Drive motor I; 411. Extrusion bar; 5. Waste bin; 6. Extrusion block II; 7. Isolation net; 8. Limiting block; 9. Steel wire rope. Detailed Implementation

[0020] Please see Figure 1-8 This invention provides a technical solution: a separation and melting system for waste lead grids in the recycling of waste lead-acid batteries, comprising a smelting device 1 and a transfer tank 2. The transfer tank 2 is located on one side of the smelting device 1. The smelting device refers to a waste metal melting furnace, such as a gas furnace or a medium-frequency melting furnace, with an open furnace opening and a temperature controlled at 330-380°C to avoid the generation of toxic lead fumes. This is known technology and will not be elaborated further. The system also includes a gas supply mechanism 3 and a screening and feeding mechanism 4. The gas supply mechanism 3 is located on the upper side of the smelting device 1 and uses the heat from the smelting device 1 to heat the gas flow into the transfer tank 2 to dry the material. The screening and feeding mechanism 4 is located between the transfer tank 2 and the smelting device 1 for conveying the waste lead grids into the smelting device 1, and the outlet of the transfer tank 2 is located on the upper side of the screening and feeding mechanism 4.

[0021] The screening and feeding mechanism 4 includes a conveyor frame 41, conveyor discs 44, a plate chain 45, extrusion blocks 46, pads 47, a mounting frame 48, extrusion rollers 49, a drive motor 410, extrusion bars 411, a vibration assembly 42, and a screening assembly 43. The conveyor frame 41 is located between the transfer drum 2 and the melting device. Two sets of conveyor discs 44 are respectively installed on both sides of the conveyor frame 41, and the two sets of conveyor discs 44 are connected by a plate chain 45. Extrusion blocks 46 are fixedly connected to the outer side of the chain plates of the plate chain 45 at equal intervals. The extrusion blocks 46 are made of hard alloy material, with a height of 8mm to 12mm and a spacing of 4 to 10mm between adjacent extrusion blocks 46. This is suitable for waste lead mesh materials with a particle size of 2mm to 8mm, ensuring extrusion fit. Two pads 47 are also installed on the conveyor frame 41. The two pads 47 are located on the left and right sides of the plate chain 45, and the upper surface of the pads 47 is... The inner side of the plate chain 45 is in contact with the support of the plate chain 45. The mounting frame 48 is fixedly mounted on the upper side of the conveyor frame 41. Two extrusion rollers 49 are respectively movably mounted on the left and right sides of the mounting frame 48. The two extrusion rollers 49 are connected by belt drive. The drive motor 410 is mounted on the mounting frame 48, and the output end of the drive motor 410 is fixedly connected to either extrusion roller 49 to drive it to rotate. The side wall of the extrusion roller 49 is fixedly connected with annularly arranged extrusion strips 411, and the axial direction of the extrusion strips 411 is consistent with the axial direction of the extrusion roller 49. The extrusion strips 411 on the extrusion roller 49 mesh with the extrusion block 46 on the plate chain 45 to drive the plate chain 45 to move. A vibration component 42 is also provided on the conveyor frame 41 and in the middle of the plate chain 45 to vibrate and remove impurities from the material on the plate chain 45. A screening component 43 is provided on the side of the conveyor frame 41 near the melting device 1 to screen out impurities in the material.

[0022] It should be noted that by using the vibration component 42, the position of the lead grid debris on the plate chain 45 can be changed between the two extrusion rollers 49, and the lead grid debris can be extruded from different angles, thereby improving the peeling efficiency of the lead grid surface oxidation.

[0023] The transfer barrel 2 includes a barrel body 21, a feeding hopper 22, a discharge pipe 23, a second drive motor 24, a conveyor shaft 25, spiral blades 26, a vent 27, and a waste discharge pipe 28. The feeding hopper 22 is fixedly connected to the top wall of the barrel body 21, and the discharge pipe 23 is fixedly connected to the middle of the bottom wall of the barrel body 21, with the discharge port of the discharge pipe 23 pointing towards the side of the upper surface of the plate chain 45 away from the smelting device 1. The second drive motor 24 is fixedly installed in the middle of the top wall of the barrel body 21, and the conveyor shaft 25... The spiral blade 26 is fixedly connected to the conveyor shaft 25 and located inside the barrel 21, with its top end movably connected to the middle of the top wall of the barrel 21 and fixedly connected to the output end of the drive motor 24. The spiral blade 26 is fixedly connected to the conveyor shaft 25 and located inside the barrel 21. The spiral blade 26 has evenly distributed ventilation holes 27. The waste discharge pipe 28 is fixedly connected to the top wall of the barrel 21 to discharge the waste gas in the transfer barrel 2. The air outlet of the air supply mechanism 3 is fixedly connected to the bottom wall of the barrel 21, and the hot air introduced through it is used to dry the material.

[0024] The diameter of the spiral blade 26 is slightly smaller than the inner diameter of the barrel 21 to prevent material from passing through the gap between the spiral blade 26 and the inner wall of the barrel 21. The lead mesh debris is located on the upper side of the spiral blade 26. The hot air entering the barrel 21 comes into uniform contact with the lead debris through the vent 27 for drying. The diameter setting of the spiral blade 26 helps the lead debris to be discharged rhythmically through the discharge pipe 23.

[0025] It should be noted that the vent 27 is designed for the passage of high-temperature airflow, enhancing the contact between the high-temperature airflow and the lead grid debris. At the same time, the aperture of the vent 27 should be selected based on the size of the lead grid debris to reduce the possibility of the vent 27 being blocked. Meanwhile, to prevent exhaust gas from being discharged through the feeding hopper 22, a one-way baffle can be installed on the feeding hopper 22. This is a well-known technology and will not be described in detail.

[0026] The gas supply mechanism 3 includes a blower 31 and a heat exchange tube 32. The blower 31 is installed outside the smelting device 1. The heat exchange tube 32 is in a continuous S-shape and is installed on the upper side of the furnace body of the smelting device 1 by a bracket. Both ends of the heat exchange tube 32 extend outward and are fixedly connected to the air outlet of the blower 31 and the bottom wall of the barrel 21, respectively. The position of the heat exchange tube 32 is set so that the airflow inside can be heated by the high temperature inside the smelting device 1. The high temperature airflow helps to dry the lead grid mesh debris.

[0027] The vibration assembly 42 includes a vibration motor 421, a transmission rod 422, and a transmission wheel 423. The vibration motor 421 is mounted on the transmission frame 41 and is located inside the plate chain 45. Several transmission rods 422 are mounted on the upper side of the housing of the vibration motor 421. One end of the transmission rod 422 extends into the plate chain 45 and is movably connected to the transmission wheel 423. The transmission wheel 423 contacts the inner side of the plate chain 45. The position of the transmission wheel 423 should be set to ensure that it can rotate with the plate chain 45 and avoid obstructing the normal movement of the plate chain 45.

[0028] The screening assembly 43 includes a screening frame 431, a screen 432, a second vibrating motor 433, and a screening hopper 434. The screening frame 431 is installed on the side of the conveyor frame 41 near the smelting device 1. The screen 432 is installed on the screening frame 431 to receive the material falling from the conveyor chain 45. The screen 432 is inclined towards the furnace opening of the smelting device 1. The second vibrating motor 433 is installed on the screening frame 431. The screening hopper 434 is hung on the edge of the furnace body of the smelting device 1 by its back hook. The screening hopper 434 is located inside the furnace body of the smelting device 1 and is located below the material falling point of the screen 432. The specifications of the screen 432 should be selected according to the size of the lead scrap. The oxides stripped off after extrusion can be screened.

[0029] It also includes a waste bin 5, which is located below the screen 432 and is used to recover impurities screened out of the material.

[0030] Several equally spaced extrusion blocks 6 are arranged between adjacent extrusion bars 411. The gap between the extrusion blocks 6 and the adjacent extrusion blocks 46 on the plate chain 45 is opposite to cooperate in extruding the material. The extrusion blocks 6, together with the extrusion bars 411, can fill the gap between each extrusion block 46 on the plate chain 45, and extrude the lead grid debris while driving the plate chain 45 to move.

[0031] An isolation net 7 is movably connected to the middle of one side of the inner wall of the screening hopper 434. A limit block 8 is fixedly connected to the other side of the inner wall of the screening hopper 434 at the position corresponding to the isolation net 7. One end of a steel wire rope 9 is fixedly connected to the isolation net 7 away from the connection point between it and the screening hopper 434. By pulling up the isolation net 7 with the steel wire rope 9 so that it is parallel to the bottom of the screening hopper 434, the screening hopper 434 can be divided into upper and lower parts.

[0032] It should be noted that since the screening hopper 434 needs to be in the smelting device 1 for a long time, it should be made of high temperature resistant material, as should the isolation screen 7. The holes on the screening hopper 434 and the isolation screen 7 should also be selected based on the size of the material. Their main function is to screen copper terminals and slag.

[0033] When this equipment is working, the crushed and water-separated waste lead screen is fed into the barrel 21 through the feeding hopper 22. The blower 31 blows high-speed airflow into the barrel 21 through the bottom of the barrel 21. The airflow carries the water on the waste lead screen and discharges it from the barrel 21 through the waste discharge pipe 28. During the process, the drive motor 24 rotates and drives the spiral blades 26 on the conveyor shaft 25 to rotate. Using gravity and the centrifugal force generated by the rotation of the spiral blades 26, the crushed lead screen is gradually conveyed to the bottom of the barrel 21 and discharged through the discharge pipe 23. The discharged lead grid fragments fall onto the plate chain 45. The drive motor 410 drives the extrusion roller 49 to rotate. Based on the meshing of the extrusion block 46 and the extrusion bar 411, the plate chain 45 rotates, conveying the broken lead grid towards the smelting device 1. During the process, the lead grid fragments on the plate chain 45 are squeezed by the extrusion block 46, the extrusion block 6 and the extrusion bar 411. The deformation of the lead grid peels off the lead oxide attached to its surface. The vibration motor 421 transmits the vibration to the middle of the plate chain 45 through the transmission rod 422 and the transmission wheel 423. When the lead grid moves with the plate chain 45 between the two extrusion rollers 49, the lead grid fragments are vibrated and jump. When the next extrusion roller 49 squeezes it, the position of the lead grid changes. Then the lead grid falls onto the screen 432. The vibration motor 433 works to make the peeled lead oxide fall through the screen 432 into the waste bin 5. The lead grid falls into the bottom of the screen hopper 434. The lead grid falling into the bottom of the sieve hopper 434 is gradually melted by the smelting device. Since there is no molten lead in the furnace when the equipment is initially started, the relatively wet lead grid fragments will not explode. The molten lead can flow freely inside and outside the sieve hopper 434. Copper terminals that are still solid due to insufficient temperature are collected at the bottom of the sieve hopper 434. During the melting process of the lead grid, the waste residue generated by the oxides remaining on it is also trapped in the sieve hopper 434 and floats on the molten lead. After one batch is completed... When the lead melt needs to be cleaned after smelting or during the process, a new screen hopper 434 is hung in the furnace of the smelting device 1 and pushed to replace the previous screen hopper 434. The wire rope 9 is pulled to lift the isolation net 7 until it is blocked by the limit block 8, so that the isolation net 7 is parallel to the bottom of the screen hopper 434. At this time, the waste residue is on the upper side of the isolation net 7 and the copper terminal is at the bottom of the screen hopper 434. Then the screen hopper 434 is removed from the furnace body of the smelting device 1 to complete the separation of the waste residue and the copper terminal. As the lead grid melts, the temperature inside the furnace rises. The airflow blown out by the blower 31 is heated by the melting device 1 when it passes through the heat exchange tube 32. After the high-pressure airflow enters the barrel 21, the drying effect on the lead scrap will be significantly improved, the humidity of the lead grid scrap will be greatly reduced, and the lead oxide on the surface of the lead grid scrap will become easier to peel off.

[0034] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A separation and melting system for waste lead grids in the recycling of waste lead-acid batteries, comprising a smelting device and a transfer tank, wherein the transfer tank is disposed on one side of the smelting device, characterized in that: It also includes an air supply mechanism and a screening and feeding mechanism. The air supply mechanism is located on the upper side of the smelting device and uses the heat of the smelting device to heat the airflow into the transfer tank to dry the material. The screening and feeding mechanism is located between the transfer tank and the smelting device for conveying waste lead grid into the smelting device, and the discharge port of the transfer tank is located on the upper side of the screening and feeding mechanism. The screening and feeding mechanism includes a conveyor frame, conveyor discs, a plate chain, an extrusion block, a pad, a mounting frame, an extrusion roller, a drive motor, an extrusion bar, a vibration assembly, and a screening assembly. The conveyor frame is located between the transfer tank and the melting device. Two sets of conveyor discs are respectively installed on both sides of the conveyor frame, and the two sets of conveyor discs are connected by a plate chain drive. The outer side of the plate chain is fixedly connected to an extrusion block arranged at equal intervals. Two pads are also installed on the conveyor frame, located on the left and right sides of the plate chain, with the upper surface of the pads contacting the inner side of the plate chain to provide support. The mounting frame is fixedly installed on the upper side of the conveyor frame. The pressure rollers are movably installed on the left and right sides of the mounting frame. The two pressure rollers are connected by belt drive. A drive motor is installed on the mounting frame, and the output end of the drive motor is fixedly connected to any one of the pressure rollers to drive its rotation. The side wall of the pressure roller is fixedly connected with annularly arranged pressure strips, and the axial direction of the pressure strips is consistent with the axial direction of the pressure roller. The pressure strips on the pressure roller mesh with the pressure block on the plate chain to drive the plate chain to move. A vibration component is also set on the conveyor frame and in the middle of the plate chain to vibrate and remove impurities from the material on the plate chain. A screening component is set on the side of the conveyor frame near the smelting device to screen out impurities in the material.

2. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 1, characterized in that: The transfer barrel includes a barrel body, a feeding hopper, a discharge pipe, a second drive motor, a conveyor shaft, spiral blades, vent holes, and a waste discharge pipe. The feeding hopper is fixedly connected to the top wall of the barrel body, and the discharge pipe is fixedly connected to the middle of the bottom wall of the barrel body, with the discharge port of the discharge pipe pointing towards the side of the upper surface of the plate chain away from the smelting device. The second drive motor is fixedly installed in the middle of the top wall of the barrel body. The conveyor shaft is located inside the barrel body, and its top end is movably connected to the middle of the top wall of the barrel body and fixedly connected to the output end of the second drive motor. The spiral blades are fixedly connected to the conveyor shaft and located inside the barrel body, with evenly distributed vent holes on the spiral blades. The waste discharge pipe is fixedly connected to the top wall of the barrel body to discharge waste gas from the transfer barrel. The air outlet of the air supply mechanism is fixedly connected to the bottom wall of the barrel body, using the hot air introduced through it to dry the material.

3. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 2, characterized in that: The gas supply mechanism includes a blower and a heat exchange tube. The blower is installed outside the smelting device, and the heat exchange tube is in a continuous S-shape and is installed on the upper side of the furnace body of the smelting device by a bracket. Both ends of the heat exchange tube extend outward and are fixedly connected to the gas outlet end of the blower and the bottom wall of the barrel, respectively.

4. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 3, characterized in that: The vibration assembly includes a vibration motor, a transmission rod, and a transmission wheel. The vibration motor is mounted on the conveyor frame and located inside the plate chain. Several transmission rods are mounted on the upper side of the housing of the vibration motor. One end of each transmission rod extends into the plate chain and is movably connected to a transmission wheel, which is in contact with the inner side of the plate chain.

5. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 4, characterized in that: The screening assembly includes a screening frame, a screen, a second vibrating motor, and a screening hopper. The screening frame is installed on the side of the conveyor frame near the smelting device. The screen is installed on the screening frame to receive the material falling from the plate chain conveyor, and the screen is inclined towards the furnace opening of the smelting device. The second vibrating motor is installed on the screening frame. The screening hopper is located inside the furnace of the smelting device and is hung on the edge of the furnace body of the smelting device through a hook on its back side, and is located below the material falling point of the screen.

6. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 5, characterized in that: It also includes a waste bin, which is located below the screen and is used to recover impurities screened out of the material.

7. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 1, characterized in that: Several extrusion blocks 2 are arranged at equal intervals between adjacent extrusion bars, and the gaps between the extrusion blocks 2 and the adjacent extrusion blocks 1 on the plate chain are opposite to cooperate in extruding materials.

8. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 2, characterized in that: The diameter of the spiral blades is slightly smaller than the inner diameter of the barrel to prevent material from passing through the gap between the spiral blades and the inner wall of the barrel.

9. The separation and melting system for waste lead grids in the recycling of waste lead-acid batteries according to claim 5, characterized in that: An isolation net is movably connected to the middle of one side of the inner wall of the screening hopper, and a limit block is fixedly connected to the other side of the inner wall of the screening hopper at the position corresponding to the isolation net. One end of a steel wire rope is fixedly connected to the isolation net away from its connection with the screening hopper. By pulling the isolation net up with the steel wire rope so that it is parallel to the bottom of the screening hopper, the screening hopper can be divided into upper and lower parts.

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