Environment-friendly lead slag screening device and screening method

Abstract

The invention belongs to the technical field of lead smelting and lead alloy configuration, and particularly relates to an environment-friendly lead slag screening device and method.The environment-friendly lead slag screening device comprises a lead pan, the lead pan is connected with a collecting and screening mechanism through an adsorption pipe inserted into the upper portion in the lead pan, and a negative pressure collecting area and a vibration screening area are arranged in the collecting and screening mechanism; the vibration screening area is located below the negative pressure collecting area and forms a lead slag screening system together with the negative pressure collecting area, the adsorption pipe and the lead pan, and the negative pressure collecting area is connected with a negative pressure station through a negative pressure pipe connected to the top of the collecting and screening mechanism and forms a lead slag collecting system together with the negative pressure station, the negative pressure pipe, the adsorption pipe and the lead pan. The problems of low lead slag treatment efficiency, high energy consumption and serious environmental pollution in the lead smelting and lead alloy preparation process are solved, and the dual purposes of energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of lead smelting and lead alloy configuration, and in particular relates to an environmentally friendly lead slag screening device and a screening method. Background Art

[0002] In the process of lead smelting and lead alloy preparation, lead slag such as lead oxide is formed due to the precipitation of impurities in lead or contact with oxygen in the air. If these lead slags are not treated in time, the quality of lead liquid and the performance of subsequent products will be seriously affected. The current lead slag treatment method is mainly to add a slag remover to the lead pot to separate the lead slag from the lead liquid and float it on the surface of the lead liquid, and then the lead slag floating on the surface of the lead liquid is frequently salvaged by manual or simple slag catching tools. This salvage method is time-consuming, inefficient, and has high production costs. In addition, the lead liquid still needs to be heated during the salvage process to prevent the lead liquid from solidifying, which not only increases energy consumption, but also easily leads to further oxidation of the lead liquid to form more lead slag. Since the salvaged lead slag is usually placed in an open storage bucket, a small amount of lead smoke and lead dust will escape in this case, which seriously pollutes the environment and poses a threat to the health of operators.

[0003] There are studies in the prior art on the problems of frequent lead slag salvage using manual or simple slag scavenging tools, such as patent application CN107812920A - battery casting welding device, method and storage medium based on negative pressure quantitative lead liquid suction, which absorbs lead liquid by the negative pressure principle to avoid the mold from being directly immersed in lead liquid, thereby reducing the lead slag rate and solving the problems of long time consumption, low efficiency and high cost of frequent lead slag salvage using manual or simple slag scavenging tools. The existing negative pressure suction method is only applicable to the quantitative suction of lead liquid in the battery casting welding process, but it is difficult to apply to the lead slag generated in the lead smelting and lead alloy configuration process, which seriously affects the effect and efficiency of lead smelting and lead alloy configuration. To this end, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly lead slag screening device and screening method to solve the problem that the current negative pressure suction method proposed in the above background technology is difficult to apply to the lead slag produced in the process of lead smelting and lead alloy configuration, which seriously affects the effect and efficiency of lead smelting and lead alloy configuration, and it is also difficult to fundamentally solve the problem of frequent lead slag salvage using manual or simple slag scooping tools.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly lead slag screening device, comprising a lead pot, a stirrer is arranged on the top of the lead pot, a stirring rod of the stirrer passes through the lead pot cover and extends into the lead pot, the lead pot is connected to a collecting and screening mechanism through an adsorption tube inserted into the upper part of the lead pot, a negative pressure collecting area and a vibration screening area are arranged in the collecting and screening mechanism, the vibration screening area is located below the negative pressure collecting area and together with the negative pressure collecting area, the adsorption tube and the lead pot constitute a lead slag screening system, the negative pressure collection area is connected to a negative pressure station through a negative pressure tube connected to the top of the collecting and screening mechanism and together with the negative pressure station, the negative pressure tube, the adsorption tube and the lead pot constitute a lead slag collection system, and the side of the negative pressure station is connected to a vacuum pump.

[0006] Furthermore, a feed pipe connected to the adsorption tube is provided at the front end of the negative pressure collection area, and a cooling pipe A is coaxially coated on the outer side of the feed pipe, and a cooling water outlet A is provided at the upper end of the cooling pipe A, and a cooling water inlet A is provided at the lower end of the cooling pipe A, and the end of the feed pipe is connected to the collection chamber located at the rear end of the negative pressure collection area; a V-shaped filter cotton is provided at the top of the collection chamber, and the filter cotton is connected to the negative pressure station through a negative pressure pipe to form a negative pressure filtration system, and a pulse air gun fixed on the side wall of the negative pressure collection area is provided on both sides of the lower end of the filter cotton, and the air ports of the two pulse air guns are respectively aligned with the two sides of the bottom end of the filter cotton.

[0007] Furthermore, a baffle inclined downward is provided on the side wall of the collecting chamber opposite to the feeding pipe, and the baffle is suspended in the collecting chamber through the side wall of the collecting chamber and forms a lead discharge port between the vibrating screen at the upper end of the vibration screening area; one end of the vibrating screen is fixed on the side wall of the vibration screening area connected to the feeding pipe and is arranged opposite to the baffle, and the other end of the vibrating screen is inclined downward and overlapped between the lead slag discharge pipe and the lead discharge pipe at the lower end of the vibration screening area and at the same time is arranged in an inverted eight-shaped structure with the suspended end of the baffle, and the bottom end of the inclined surface of the vibrating screen is horizontally connected to a transmission shaft along the inclined surface, and the transmission shaft is horizontally fixed to the side wall of the vibration screening area through a vibration motor fixed to the outer side wall of the collecting and screening mechanism.

[0008] Furthermore, the lead slag discharge pipe and the lead sheet discharge pipe are both arranged in a V-shaped structure, the upper end of the lead slag discharge pipe is connected to the screen hole of the vibrating screen, and the upper end of the lead sheet discharge pipe is connected to the lead sheet discharge port; the lead slag discharge pipe with a V-shaped structure and the lead sheet discharge pipe with a V-shaped structure are combined side by side into an irregular W-shaped structure and are arranged at the lower end of the vibration screening area, the wall surface of the irregular W-shaped structure is coated with a cooling pipe B, a cooling water inlet B is arranged in the middle of the cooling pipe B, and a cooling water outlet B is arranged at each end of the cooling pipe B.

[0009] The lead slag produced by the lead liquid in the lead pot is collected and screened by the environmentally friendly lead slag screening device set up as above. The specific screening steps are as follows: S1. Add lead into a lead pot and heat until it is melted, then add a slag remover and stir until the lead slag is in powder form and gathers in the center of the lead liquid; S2, inserting the adsorption tube into the lead pot with its end in contact with the upper surface of the lead slag in the center of the lead liquid, adsorbing the lead slag to the negative pressure collection area under the negative pressure of the negative pressure station, and cooling the lead slag by the cooling water at the front feed pipe of the negative pressure collection area when the lead slag enters the negative pressure collection area; S3. The lead slag after cooling will settle in the vibration screening area under the action of its own weight. The small lead slag and large lead slag or lead sheet will be screened out by the vibration action of the vibration screening area. During the vibration screening process, the negative pressure station will simultaneously adsorb the lead slag onto the filter cotton at the upper part of the negative pressure collection area, and blow off the lead slag adsorbed on the filter cotton through the pulse air gun on the side wall of the negative pressure collection area; S4, small lead slag is collected into the lead slag discharge pipe at the lower end of the vibration screening area, and large lead slag or lead sheet is collected into the lead sheet discharge pipe at the lower end of the vibration screening area. When the small lead slag and large lead slag or lead sheet enter the lead slag discharge pipe and the lead sheet discharge pipe respectively, they will be cooled again by the cooling water at the discharge place at the lower end of the vibration screening area; S5. After the small lead slag and large lead slag or lead sheet to be collected have dropped to room temperature, the discharge ports of the lead slag discharge pipe and the lead sheet discharge pipe are opened respectively for discharge; S6. The collected large lead slag or lead sheet will be directly returned to the lead pot for recycling.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a combination of negative pressure collection and vibration screening to achieve the purpose of rapid, efficient collection and accurate screening of lead slag, effectively solves the problems of low efficiency, high energy consumption and serious environmental pollution in the process of lead slag treatment during lead smelting and lead alloy configuration, greatly improves the efficiency and quality of lead slag treatment, and through the arrangement of the lead slag collection system composed of the negative pressure collection area, the negative pressure station, the negative pressure pipe, the adsorption pipe and the lead pot, the lead slag can be directly adsorbed from the lead pot to the negative pressure collection area, effectively avoiding the cumbersome process of frequent salvage by manual or simple slag scavenging tools, reducing energy consumption and labor costs, and also effectively avoiding the problem of further oxidation of the lead liquid due to continuous heating of the lead liquid, thereby controlling the generation of lead slag, improving the effect of lead smelting and lead alloy configuration, and achieving the dual goals of energy saving and environmental protection, and through the arrangement of the lead slag screening system composed of the vibration screening area, the negative pressure collection area, the adsorption pipe and the lead pot, small lead slag and large lead slag or lead skin can be effectively separated under the accurate screening of the lead slag screening system, which is conducive to better recycling of lead slag resources, reduces production costs, and conforms to the concept of sustainable development; 2. The present invention provides cooling pipes A and B in the negative pressure collection area and the vibration screening area respectively, so that the lead slag entering the collection and screening mechanism can be cooled down in a timely and effective manner, effectively preventing the lead slag from being further oxidized and polluted during the collection and discharge process. The negative pressure pipe connects the filter cotton and the negative pressure station to form a negative pressure filtration system, effectively reducing the risk of lead smoke and lead dust escaping during the lead slag treatment process, protecting the operating environment, and reducing the health threat to operators. The air pressure of the pulse air gun is used to effectively solve the problem of filter cotton clogging, ensuring the continuous and efficient operation of the negative pressure filtration system, thereby improving the environmental protection performance; 3. The present invention forms a lead sheet discharge port by designing a baffle plate inclined downward and a vibrating screen arranged opposite to the baffle plate, so that small lead slag and large lead slag or lead sheet can be effectively separated, ensuring that the collected lead slag does not contain lead or lead alloy, further improving the environmental protection performance, utilizing the vibration effect of the vibration motor, so that the small lead slag can be fully screened out under the vibration of the vibrating screen driven by the vibration motor, thereby improving the accuracy of screening, and the inclined design of the vibrating screen and the inverted eight-shaped structure setting with the baffle plate are conducive to the smooth flow of small lead slag and large lead slag or lead sheet during the screening process, avoiding the phenomenon of blockage and accumulation, and adopting a V-shaped lead slag discharge pipe and a V-shaped lead sheet discharge pipe to be combined side by side into an irregular W-shaped structure, which not only optimizes the spatial layout, but also reduces energy consumption, is conducive to the smooth discharge of lead slag and lead sheet, and effectively avoids the problem of increased energy consumption caused by pipe bending or blockage, and at the same time, the compact W-shaped structure also reduces the volume and floor space of the entire screening device, and improves the space utilization rate; 4. The present invention realizes the automatic control of the whole process of lead slag extraction, cooling, screening, cooling again, final discharge and return to the furnace through a series of orderly and efficient steps combined with modern equipment such as negative pressure station, vacuum pump, vibration motor and pulse air gun, which greatly improves the efficiency of lead slag treatment, reduces manual intervention, reduces production costs, and improves the safety and accuracy of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the lead removal pot (including part of the adsorption tube); Figure 3 for Figure 2 The schematic diagram of the structure of the negative pressure station is removed (including the negative pressure pipe); Figure 4 for Figure 1 Schematic diagram of the structure of the medium lead pot (including adsorption tube).

[0012] Wherein: 1. Lead pot; 101. Lead pot cover; 2. Mixer; 201. Mixing rod; 3. Insulation layer; 4. Adsorption tube; 401. Operating switch; 5. Collecting and screening mechanism; 501. Negative pressure collecting area; 502. Vibration screening area; 6. Negative pressure tube; 7. Negative pressure station; 701. Vacuum pump; 8. Feeding pipeline; 9. Cooling pipeline A; 10. Cooling water outlet A; 11. Cooling water inlet A; 12. Collecting chamber; 13. Filter cotton; 14. Pulse air gun; 15. Baffle; 16. Vibrating screen; 17. Lead sheet discharge port; 18. Lead slag discharge pipeline; 19. Lead sheet discharge pipeline; 20. Drive shaft; 21. Vibrating motor; 22. Cooling pipeline B; 23. Cooling water inlet B; 24. Cooling water outlet B. DETAILED DESCRIPTION

[0013] The following examples are used to further illustrate the content of the present invention, but do not limit the application of the present invention.

[0014] See also Figure 1-Figure 4 The present invention provides an environmentally friendly lead slag screening device, comprising a lead pot 1 for melting lead liquid, a stirrer 2 for stirring is arranged on the top of the lead pot 1, a stirring rod 201 of the stirrer 2 penetrates the lead pot cover 101 and extends into the lead pot 1, the outside of the lead pot 1 is wrapped with a heat preservation layer 3 for heat preservation, an adsorption tube 4 for adsorbing lead slag is inserted into the inner upper part of the lead pot 1 (the adsorption tube 4 is provided with an operation switch 401 for controlling the adsorption tube 4 to negatively pressure adsorb the lead slag), and a collecting and screening mechanism 5 for collecting and screening the lead slag is connected through the adsorption tube 4, and a negative pressure collecting area 501 for collecting the lead slag and a screen for screening are arranged in the collecting and screening mechanism 5 A vibration screening area 502 for selecting small lead slag and large lead slag or lead sheets, the vibration screening area 502 is located below the negative pressure collecting area 501 and together with the negative pressure collecting area 501, the adsorption tube 4 and the lead pot 1 constitute a lead slag screening system; the top of the collecting and screening mechanism 5 is connected with a negative pressure pipe 6 for connecting to a negative pressure station 7, the negative pressure collecting area 501 is connected to a negative pressure station 7 for providing negative pressure through the negative pressure pipe 6 (the side of the negative pressure station 7 is connected with a vacuum pump 701 for providing pressure, and the pressure provided is in the range of -0.08 to -0.1 MPa) and together with the negative pressure station 7, the negative pressure pipe 6, the adsorption tube 4 and the lead pot 1 constitute a lead slag collection system.

[0015] See also Figure 1-Figure 3 The front end of the negative pressure collection area 501 is provided with a feed pipe 8 connected with the adsorption tube 4 and used for lead slag to enter, the outer side of the feed pipe 8 is coaxially coated with a cooling pipe A9 for filling cooling water, the upper end of the cooling pipe A9 is provided with a cooling water outlet A10 for discharging cooling water, the lower end of the cooling pipe A9 is provided with a cooling water inlet A11 for discharging cooling water, and the end of the feed pipe 8 is connected with a collection chamber 12 located at the rear end of the negative pressure collection area 501 and used for collecting lead slag; At the top of the collection chamber 12, there is a filter cotton 13 with a V-shaped structure for preventing the escape of lead fumes and lead dust. The filter cotton 13 is connected to a negative pressure station 7 through a negative pressure pipe 6 to form a negative pressure filtration system; On both sides of the lower end of the filter cotton 13, there is an inclined upwardly arranged pulse air gun 14 fixed to the side wall of the negative pressure collection area 501, which is used to blow off the lead slag adsorbed on the filter cotton 13. The air ports of the two pulse air guns 14 are respectively aligned with both sides of the bottom end of the filter cotton 13; On the side wall of the collection chamber 12 opposite to the feed pipe 8, there is a baffle 15 arranged inclined downwardly and used to assist the vibrating screen 16 in screening lead slag. The baffle 15 is suspended in the collection chamber 12 through the side wall of the collection chamber 12 and forms a lead skin discharge port 17 for separating large lead slag or lead skins between the vibrating screen 16 (the sieve holes of the whole vibrating screen of the vibrating screen 16 are five meshes for screening smaller lead slag) at the upper end of the vibration screening area 502; One end of the vibrating screen 16 is fixed to the side wall of the vibration screening area 502 connected to the feed pipe 8 and is arranged opposite to the baffle 15. The other end of the vibrating screen 16 is arranged inclined downwardly and overlaps between the lead slag discharge pipe 18 and the lead skin discharge pipe 19 at the lower end of the vibration screening area 502 and is simultaneously arranged in an inverted V-shaped structure with the suspended end of the baffle 15; At the bottom end of the inclined plane of the vibrating screen 16, there is a transmission shaft 20 horizontally connected along the inclined plane for transmission. The transmission shaft 20 is horizontally fixed to the side wall of the vibration screening area 502 through a vibration motor 21 fixed to the outer side wall of the collection and screening mechanism 5, so that the vibrating screen 16 vibrates with the vibration of the transmission shaft 20 under the drive of the vibration motor 21; Both the lead slag discharge pipe 18 and the lead skin discharge pipe 19 are arranged in a V-shaped structure. The upper end of the lead slag discharge pipe 18 is communicated with the sieve holes of the vibrating screen 16, and the upper end of the lead skin discharge pipe 19 is communicated with the lead skin discharge port 17; The V-shaped lead slag discharge pipe 18 and the V-shaped lead skin discharge pipe 19 are arranged side by side to form an irregular W-shaped structure and are arranged at the lower end of the vibration screening area 502. The wall surface of the irregular W-shaped structure is covered with a cooling pipe B22 for filling cooling water. In the middle of the cooling pipe B22, there is a cooling water inlet B23 for discharging cooling water, and at both ends of the cooling pipe B22, there is a cooling water outlet B24 for discharging cooling water.

[0016] The working principle and usage process of the present invention: As Figure 1-Figure 4As shown in the figure, after the lead slag screening device is assembled, the operator will install the entire device on the production line for manufacturing lead-acid batteries (the functions and structures of conventional equipment such as the production line for manufacturing lead-acid batteries are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in the attached drawings), which can solve the problems of low efficiency, high energy consumption and serious environmental pollution in the process of lead slag treatment during lead smelting and lead alloy configuration, greatly improve the efficiency and quality of lead slag treatment, avoid the cumbersome process of frequent salvage by manual or simple slag scavenging tooling, reduce energy consumption and labor costs, and solve the problem of further oxidation of lead liquid due to continuous heating of lead liquid, thereby controlling the generation of lead slag, improving the effect of lead smelting and lead alloy configuration, and achieving the dual goals of energy saving and environmental protection. At the same time, small lead slag and large lead slag or lead skin can be accurately screened out, which is conducive to better recycling of lead slag resources, reducing production costs, and conforming to the concept of sustainable development; When the lead liquid in the lead pot 1 is melted and lead slag is produced, the operator uses the above-mentioned environmentally friendly lead slag screening device to collect and screen the lead slag, and the screened large lead slag or lead sheet will be directly returned to the lead pot 1 for recycling. Specifically: first, add lead to the lead pot 1, and heat it to 400-550°C to melt it to form lead liquid, and then add a slag remover (the raw material components of the existing slag remover are not specifically described here, but its function should not be limited thereby), and then turn on the mixer 2, and use the stirring rod 201 to make the slag remover and the lead slag in the lead liquid fully react until the lead slag becomes powdery, and then reduce the stirring speed of the mixer 2 to form a small vortex in the lead liquid, forcing the powdered lead slag to gather in the center of the lead liquid; secondly, insert the adsorption tube 4 into the lead pot and make its end contact with the upper surface of the lead slag in the center of the lead liquid, and turn on the vacuum pump 701 to make it. The negative pressure station 7 is in a negative pressure state, and at the same time, the operating switch 401 of the adsorption tube 4 is turned on. At this time, the lead slag will be adsorbed from the end of the adsorption tube 4 into the adsorption tube 4 under the action of negative pressure, and then sucked into the feed pipe 8 through the adsorption tube 4. Since the cooling water here will be discharged into the cooling pipe A9 wrapped on the outside of the feed pipe 8 through the cooling water inlet A11, the lead slag will be rapidly cooled to below 100°C under the action of the cooling water in the cooling pipe A9 while being sucked into the feed pipe 8; the cooled lead slag will continue to be sucked into the collection chamber 12 through the feed pipe 8 under the action of negative pressure. Since the cooled lead slag will have self-reproduction Therefore, the lead slag after cooling will settle on the vibrating screen 16 under the action of its own weight while being sucked into the collecting chamber 12. At the same time, the vibrating motor 21 will be turned on. At this time, the vibrating screen 16 will vibrate when the vibrating motor 21 is turned on, and the small lead slag will be screened out by the vibration and the sieve holes on the vibrating screen 16. The small lead slag will fall into the lead slag discharge pipe 18 through the sieve holes on the vibrating screen 16. Since the cooling water here will be discharged into the cooling pipe B22 coated on the wall surface of the W-shaped structure composed of the lead slag discharge pipe 18 and the lead sheet discharge pipe 19 through the cooling water inlet B23, the lead slag will fall into the lead slag discharge pipe 18 at the same time. When the lead slag is discharged from the lead slag discharge pipe 18, the temperature will drop to room temperature under the action of the cooling water in the cooling pipe B22, and the discharge port of the lead slag discharge pipe 18 will be opened for discharge. The large lead slag or lead sheets that cannot pass through the sieve holes on the vibrating screen 16 and fall into the lead sheet discharge pipe 19 through the lead sheet discharge port 17 under the action of their own weight along the inclined surface of the vibrating screen 16 and under the blocking action of the baffle 15, and then drop to room temperature under the action of the cooling water in the cooling pipe B22, and the discharge port of the lead sheet discharge pipe 19 will be opened for discharge and collection of the large lead slag or lead sheets, and the collected large lead slag or lead sheets will be directly returned to the lead pot 1 for recycling; When the lead slag settles due to its own weight, part of the lead slag will be adsorbed onto the filter cotton 13 under the action of negative pressure, and then the pulse air gun is turned on to blow off the lead slag adsorbed on the filter cotton 13. The blown-off lead slag will slide onto the vibrating screen 16 under the action of the baffle 15, and continue to be screened; When the collection and screening of lead slag is completed, it is necessary to close the vacuum pump 701, the operating switch 401 of the adsorption tube 4, the vibration motor 21, the discharge port of the lead slag discharge pipe 18 and the discharge port of the lead sheet discharge pipe 19. At the same time, the cooling water in the cooling pipe A9 is discharged through the cooling water outlet A10, and the cooling water in the cooling pipe B22 is discharged through the cooling water outlet B24.

Claims

1. An environmentally friendly lead slag screening device, comprising a lead pot, characterized in that: The lead pot is connected to a collecting and screening mechanism via an adsorption tube inserted into the upper part of the lead pot; a negative pressure collecting area and a vibration screening area are arranged in the collecting and screening mechanism; the vibration screening area is located below the negative pressure collecting area and together with the negative pressure collecting area, the adsorption tube and the lead pot constitute a lead slag screening system; the negative pressure collection area is connected to a negative pressure station via a negative pressure tube connected to the top of the collecting and screening mechanism and together with the negative pressure station, the negative pressure tube, the adsorption tube and the lead pot constitute a lead slag collection system.

2. An environmentally friendly lead slag screening device according to claim 1, characterized in that: A feed pipe connected to the adsorption tube is provided at the front end of the negative pressure collection area, and a cooling pipe A is coaxially coated on the outer side of the feed pipe. A cooling water outlet A is provided at the upper end of the cooling pipe A, and a cooling water inlet A is provided at the lower end of the cooling pipe A. The end of the feed pipe is connected to the collection chamber located at the rear end of the negative pressure collection area.

3. An environmentally friendly lead slag screening device according to claim 2, characterized in that: A V-shaped filter cotton is arranged at the top of the collecting chamber. The filter cotton is connected to the negative pressure station through a negative pressure pipe to form a negative pressure filtration system. A pulse air gun fixed on the side wall of the negative pressure collection area is arranged on both sides of the lower end of the filter cotton and tilted upward. The air ports of the two pulse air guns are respectively aligned with the two sides of the bottom end of the filter cotton.

4. The environmentally friendly lead slag screening device according to claim 3, characterized in that: A baffle inclined downward is arranged on the side wall of the collecting chamber opposite to the feed pipe. The baffle is suspended in the collecting chamber through the side wall of the collecting chamber and forms a lead discharge port between the baffle and the vibrating screen at the upper end of the vibrating screening area.

5. The environmentally friendly lead slag screening device according to claim 4, characterized in that: One end of the vibrating screen is fixed on the side wall of the vibrating screening area connected to the feed pipe and is arranged opposite to the baffle, the other end of the vibrating screen is arranged obliquely downward and overlapped between the lead slag discharge pipe and the lead sheet discharge pipe at the lower end of the vibrating screening area and at the same time is arranged in an inverted eight-shaped structure with the suspended end of the baffle, the bottom end of the inclined surface of the vibrating screen is horizontally connected with a transmission shaft along the inclined surface, and the transmission shaft is horizontally fixed to the side wall of the vibrating screening area through a vibration motor fixed to the outer side wall of the collecting and screening mechanism.

6. The environmentally friendly lead slag screening device according to claim 5, characterized in that: The lead slag discharge pipe and the lead sheet discharge pipe are both arranged in a V-shaped structure. The upper end of the lead slag discharge pipe is connected to the screen holes of the vibrating screen, and the upper end of the lead sheet discharge pipe is connected to the lead sheet discharge port.

7. The environmentally friendly lead slag screening device according to claim 6, characterized in that: The V-shaped lead slag discharge pipe and the V-shaped lead sheet discharge pipe are combined side by side into an irregular W-shaped structure and are arranged at the lower end of the vibration screening area. The wall surface of the irregular W-shaped structure is covered with a cooling pipe B. A cooling water inlet B is arranged in the middle of the cooling pipe B, and a cooling water outlet B is arranged at each end of the cooling pipe B.

8. The environmentally friendly lead slag screening device according to claim 1, characterized in that: A stirrer is arranged on the top of the lead pot, and a stirring rod of the stirrer penetrates the lead pot cover and extends into the lead pot.

9. The environmentally friendly lead slag screening device according to claim 1, characterized in that: The side of the negative pressure station is connected with a vacuum pump.

10. A lead slag screening method, characterized in that: The lead slag produced by the lead liquid in the lead pot is collected and screened out by using the environmentally friendly lead slag screening device as described in any one of claims 1 to 9, and the specific screening steps are as follows: S1. Add lead into a lead pot and heat until it is melted, then add a slag remover and stir until the lead slag is in powder form and gathers in the center of the lead liquid; S2, inserting the adsorption tube into the lead pot with its end in contact with the upper surface of the lead slag in the center of the lead liquid, adsorbing the lead slag to the negative pressure collection area under the negative pressure of the negative pressure station, and cooling the lead slag by the cooling water at the front feed pipe of the negative pressure collection area when the lead slag enters the negative pressure collection area; S3. The lead slag after cooling will settle in the vibration screening area under the action of its own weight. The small lead slag and large lead slag or lead sheet will be screened out by the vibration action of the vibration screening area. During the vibration screening process, the negative pressure station will simultaneously adsorb the lead slag onto the filter cotton at the upper part of the negative pressure collection area, and blow off the lead slag adsorbed on the filter cotton through the pulse air gun on the side wall of the negative pressure collection area; S4, small lead slag is collected into the lead slag discharge pipe at the lower end of the vibration screening area, and large lead slag or lead sheet is collected into the lead sheet discharge pipe at the lower end of the vibration screening area. When the small lead slag and large lead slag or lead sheet enter the lead slag discharge pipe and the lead sheet discharge pipe respectively, they will be cooled again by the cooling water at the discharge place at the lower end of the vibration screening area; S5. After the small lead slag and large lead slag or lead sheet to be collected have dropped to room temperature, the discharge ports of the lead slag discharge pipe and the lead sheet discharge pipe are opened respectively for discharge; S6. The collected large lead slag or lead sheet will be directly returned to the lead pot for recycling.

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