Alloy recovery melting device for anti-oxidation cast plate

Abstract

The application discloses a device for recycling and smelting anti-oxidation cast plate alloy, which comprises a smelting furnace with an open top, and a protective cover which is sealingly arranged at the opening of the smelting furnace. The protective cover comprises a cover body, a pressing cylinder which is arranged through the cover body, an air charging pipeline and a return cylinder which are arranged on the side wall of the pressing cylinder, and the air charging pipeline and the return cylinder are both communicated with the pressing cylinder. The smelting furnace and the protective cover are filled with inert gas through the air charging pipeline. The inert gas is filled through the air charging pipeline, and the inert gas is introduced into the upper part of the smelting furnace and the pressing cylinder, so that the part of the recycled material inlet which is in contact with air at the upper part of the smelting furnace is filled with the inert gas, the content of oxygen in the space is reduced, and the air oxidation of the alloy is effectively reduced.

Description

Anti-oxidation cast plate alloy recycling and smelting equipment Technical Field

[0001] This invention belongs to the field of lead-acid battery component processing technology, and particularly relates to an anti-oxidation cast plate alloy recycling and smelting device. Background Technology

[0002] Lead-acid batteries are widely used in many fields such as power, communications, postal services, transportation, shipbuilding, aerospace, and emergency lighting due to their advantages of low price, ease of use, simple maintenance, and long lifespan. However, lithium-ion and sodium-ion batteries, with their higher energy density and smaller size, are eroding the market share of lead-acid batteries. Therefore, reducing the cost of lead-acid batteries and improving their market competitiveness has become a top priority for engineering and technical personnel.

[0003] Lead-acid batteries are complex and active electrochemical systems, with lead and its alloys being the primary materials. Currently, the lead-acid battery industry typically uses lead-calcium alloys to manufacture the grids. Lead-calcium alloys, grid scraps, and recycled materials are melted into liquid in a lead-melting furnace and flow through the furnace tubes and lead ladles into the grid molds or the lead nozzles of the casting machine, forming the grids through casting or die casting. Especially in the continuous punching grid production process, a large amount of alloy waste is generated, accounting for approximately 70%-80% of the recycled materials, requiring remelting for reuse. Therefore, during the punching grid production process, a large amount of molten alloy circulates between the lead-melting pot and the punching machine, resulting in significant energy consumption and material loss. In the lead-melting furnace, the molten alloy liquid and recycled scraps from the cast plates are directly exposed to air and are easily oxidized into lead slag waste. During continuous production of perforated grids, the lead slag rate is approximately 16.7% of the input lead alloy. When abnormalities occur in the production process and production is intermittent, the lead slag rate can even reach 23% of the input lead alloy. With the fierce competition in the lead-acid battery industry and the implementation of cost reduction, protecting the grids during the manufacturing process to prevent (effectively reduce) alloy oxidation and reduce material costs and process energy consumption costs is of great significance. Summary of the Invention

[0004] This invention addresses the problem of easy oxidation of recycled perforated grid material during the molten process in the prior art, and proposes the following technical solution:

[0005] An anti-oxidation cast plate alloy recycling and smelting device includes:

[0006] Furnace, with an opening at the top;

[0007] A protective cover is sealed at the opening of the furnace. The protective cover includes a cover body, a pressing cylinder that runs through the cover body, an air filling pipe and a return cylinder that are disposed on the side wall of the pressing cylinder, and the air filling pipe and the return cylinder are both connected to the pressing cylinder.

[0008] The furnace and protective cover are filled with inert gas through the gas filling pipe.

[0009] Inert gas is introduced through the gas filling pipe. Inert gas is introduced into the upper part of the furnace and the pressure cylinder, so that the part of the recycled material inlet and the upper part of the furnace that is in contact with air is filled with inert gas, thereby reducing the oxygen content in the space and effectively reducing the oxidation of the alloy by air.

[0010] As a preferred embodiment of the above technical solution, the return material cylinder is inclined so that its outlet is at a low position. The inclined arrangement of the return material cylinder is to utilize the influence of gravity to make it easier for the recycled material to enter the pressing cylinder.

[0011] As a preferred embodiment of the above technical solution, a movable sealing plate is provided at the connection between the pressing cylinder and the return cylinder. The side wall of the return cylinder has a track of the same length as the sealing plate. The track is arranged at the top of the return cylinder, and blind holes are provided at both ends of the track. The side of the sealing plate has a movable wheel that can slide within the track. The movable wheel can move inward at the blind hole to limit the relative position of the sealing plate. A first flange that limits the sealing plate is also provided on the side wall of the return cylinder. The first flange is arranged on the side close to the pressing cylinder.

[0012] The track on the side wall of the return cylinder and the first flange together form a motion track for the sealing plate. Combined with the inclined feature of the return cylinder, the sealing plate can be automatically lifted and opened under the action of the incoming recycled material. At the same time, the cooperation between the blind hole and the movable wheel on the side of the sealing plate can control different relative fixed states of the sealing plate, so that the sealing plate can automatically close after the recycled material stops, sealing the outlet of the return cylinder and preventing the inert gas filled from escaping from the outlet, which is conducive to improving the utilization efficiency of resources.

[0013] As a preferred embodiment of the above technical solution, the inner wall of the return cylinder has a protruding second flange, which is spaced apart from the top plate to form the track. The second flange can be directly integrally formed with the return cylinder, or it can be separately processed and fixed to the inner wall of the return cylinder by welding or bolting. The track formed by the spaced second flange and the top plate makes the track protrude from the inner wall of the return cylinder. It cooperates with the protruding movable wheels on the side of the sealing plate, which not only meets the movement control of the sealing plate, but also allows the sealing plate to fall without obstruction after the material is stopped.

[0014] As a preferred embodiment of the above technical solution, the sealing plate includes a plate body and a movable wheel. The side of the plate body has a protruding cylinder, and the movable wheel is slidably fitted onto the outside of the cylinder. The simple cooperation between the cylinder and the slidably fitted movable wheel can simultaneously achieve the rotation and translation of the movable wheel.

[0015] As a preferred embodiment of the above technical solution, an electromagnet corresponding to the blind hole is installed on the outer wall of the return cylinder. The cylinder of the sealing plate is a permanent magnet, and the movable wheel is a magnetic component. The magnetism of the electromagnet after being energized is greater than that of the cylinder. When the movable wheel is located in the blind hole position, the on / off control of the electromagnet can change the positional relationship of the movable wheel relative to the blind hole, thereby enabling the sealing plate to have a controllable fixed state relative to the return cylinder, so as to meet the motion control state of the sealing plate under different incoming material conditions.

[0016] The beneficial effects of this invention are as follows:

[0017] (1) Inert gas is introduced through the gas filling pipe. Inert gas is introduced into the upper part of the furnace and the pressure cylinder so that the part of the recycled material inlet and the upper part of the furnace that is in contact with air is filled with inert gas, thereby reducing the oxygen content in the space and effectively reducing the oxidation of the alloy by air.

[0018] (2) The track on the side wall of the return cylinder and the first flange together form the motion track for the sealing plate. Combined with the inclined feature of the return cylinder, the sealing plate can be automatically lifted and opened under the action of the recycled material. At the same time, combined with the cooperation of the blind hole and the movable wheel on the side of the sealing plate, different relative fixed states of the sealing plate can be controlled, so that the sealing plate can be automatically closed after the recycled material stops, sealing the outlet of the return cylinder, preventing the inert gas filled from escaping from the outlet, which is conducive to improving the utilization efficiency of resources. Attached Figure Description

[0019] Figure 1 shows a schematic diagram of the smelting apparatus in Example 1;

[0020] Figure 2 shows a schematic diagram of the protective cover in Embodiment 1;

[0021] Figure 3 shows a schematic diagram of the closed state of the connection between the pressure cylinder and the return cylinder when there is no material in the return cylinder in Example 2;

[0022] Figure 4 shows a schematic diagram of the connection between the pressure cylinder and the return cylinder gradually opening when the return cylinder receives material in Example 2;

[0023] Figure 5 shows a schematic diagram of the gradual closing of the connection between the pressure cylinder and the return cylinder when the return cylinder stops in Example 2;

[0024] Figure 6 shows a schematic diagram of the internal structure at the connection between the pressure cylinder and the return cylinder in Example 2;

[0025] Figure 7 shows a schematic diagram of the sealing plate in Embodiment 2;

[0026] Figure 8 shows a schematic diagram of the connection relationship between the movable wheel and the plate in Embodiment 2;

[0027] Figure 9 shows a schematic diagram of the external structure of the return cylinder in Example 2. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] Example 1

[0030] Figure 1 shows a schematic diagram of a specific embodiment of the present invention. Referring to Figure 1, the smelting device in this embodiment includes a furnace 1 and a protective cover 2. The top of the furnace 1 is open, and the protective cover 2 is fixedly installed on the top of the furnace 1. The furnace 1 melts the recycled material into a liquid state by heating.

[0031] Figure 2 shows a schematic diagram of the protective cover 2. Referring to Figure 2, the protective cover 2 includes a cover body 21, a pressure cylinder 22, a return cylinder 23, a screw press 24, and an air filling pipe 25. The cover body 21 is a thin-shell structure with an open lower end. The pressure cylinder 22 is fixedly connected to the top of the cover body 21. The return cylinder 23 and the air filling pipe 25 are fixedly connected to the side wall of the pressure cylinder 22, and both are connected to the pressure cylinder 22. A large amount of alloy waste generated by the perforated grid enters the pressure cylinder 22 from the return cylinder 23 and is then pressed into the furnace 1 for melting. Inert gas is filled into the air filling pipe 25. Inert gas is introduced into the upper part of the furnace 1 and the pressure cylinder 22, so that the portion of the recycled material inlet and the upper part of the furnace 1 in contact with air is filled with inert gas, effectively reducing the oxidation of the alloy by air.

[0032] The return cylinder 23 is inclined so that the recovered alloy scrap can slide directly into the pressing cylinder 22.

[0033] The aforementioned inert gases refer to the gaseous elements corresponding to all group 0 elements in the periodic table, also known as noble gases. At room temperature and pressure, they are all colorless and odorless monatomic gases, and are difficult to react chemically. These include, but are not limited to, helium (He), neon (Ne), argon (Ar), and krypton (Kr).

[0034] The aforementioned fixed connection methods can employ existing, mature technologies such as welding or flange connections.

[0035] The screw press 24 is a screw conveyor with existing technology, driven by a motor, and arranged vertically along the pressing cylinder 22. The propeller shaft of the screw press 24 is located inside the pressing cylinder 22.

[0036] Example 2

[0037] Based on actual production work, the inventors discovered that since the entire process is intermittent, the return cylinder 23 does not always contain recycled material 3. In addition, the connection between the pressing cylinder 22 and the return cylinder 23 is a completely open structure. In order to ensure that the inert gas is full, the gas filling pipe 25 needs to be continuously filled with inert gas, which is not conducive to reducing production energy consumption. The inventors further improved the technical solution based on the technology of embodiment 1, especially the structure of the connection between the pressing cylinder 22 and the return cylinder 23, so that the connection between the pressing cylinder 22 and the return cylinder 23 has an intermittent sealing function, thereby reducing the amount of inert gas escaping from the connection, reducing the amount of inert gas used, and improving energy utilization efficiency.

[0038] Figures 3 to 5 show different working states of the smelting device. Figure 3 shows a schematic diagram of the return cylinder 23 being empty and the connection between the pressure cylinder 22 and the return cylinder 23 being closed. Figure 4 shows a schematic diagram of the return cylinder 23 receiving material and the connection between the pressure cylinder 22 and the return cylinder 23 gradually opening. Figure 5 shows a schematic diagram of the return cylinder 23 being stopped and the connection between the pressure cylinder 22 and the return cylinder 23 gradually closing. The closed or open state of the connection between the pressure cylinder 22 and the return cylinder 23 is controlled according to whether there is recycled material 3.

[0039] According to Figures 3 to 5, a movable sealing plate 26 is provided at the connection between the pressing cylinder 22 and the return cylinder 23. When no recycled material 3 is supplied, the sealing plate 26 will close, and when recycled material 3 is supplied, the sealing plate 26 will open.

[0040] Referring to Figure 3, a first flange 29 protruding from the inner wall of the pressure cylinder 22 is provided at the connection between the pressure cylinder 22 and the return cylinder 23. The first flange 29 limits the sealing plate 26, ensuring that the sealing plate 26 remains stably at the connection between the pressure cylinder 22 and the return cylinder 23 in the closed state.

[0041] The return cylinder 23 has a rectangular cross-section and is formed by a top plate, a bottom plate and two side plates. Each of the two side plates is provided with a second flange 27 protruding from the inner wall of the return cylinder 23. The second flange 27 and the top plate are spaced apart to form a track 28 of a certain length. The end of the sealing plate 26 is slidably engaged with the track 28.

[0042] Referring to Figure 3, when the return cylinder 23 is empty, the upper end of the sealing plate 26 is fixed relative to the track 28. In this state, the sealing plate 26 hangs down naturally, sealing the connection between the pressure cylinder 22 and the return cylinder 23. Referring to Figure 4, when the return cylinder 23 receives material, the alloy scrap slides along the inclined return cylinder 23 to the connection point and contacts it, exerting pressure on the lower half of the sealing plate 26. In this state, the fixed state between the upper end of the sealing plate 26 and the track 28 is released, and the upper end of the sealing plate 26 can slide along the track 28. Since the track 28 and the return cylinder 23 are inclined in the same direction, under the pressure of the alloy scrap, the upper end of the sealing plate 26 moves away from the pressure cylinder along the track 28. The material cylinder 22 slides in the direction until the alloy scrap completely lifts the sealing plate 26. The sealing plate 26 is then flush with the track 28, and both ends of the sealing plate 26 are relatively fixed to the track 28 in this state. Referring to Figure 5, when the return cylinder 23 stops, the alloy scrap is completely pressed into the furnace 1 by the pressure cylinder 22. There is no alloy scrap in the return cylinder 23. In this state, the fixed state between the end of the sealing plate 26 away from the pressure cylinder 22 and the track 28 is released, and the end of the sealing plate 26 near the pressure cylinder 22 can rotate relative to the track 28. Therefore, the sealing plate 26 will fall under the action of gravity and close the connection between the pressure cylinder 22 and the return cylinder 23 again.

[0043] Figure 6 shows a schematic diagram of the internal structure at the connection between the pressure cylinder 22 and the return cylinder 23. Figure 6 shows the second flange 27 and the track 28 formed by the second flange 27 and the top plate, and also shows the first flange 29 that limits the positioning of the sealing plate 26. In addition, a blind hole 231 located on the inner wall of the return cylinder 23 is also shown. Referring to Figure 7, Figure 7 shows a schematic diagram of the structure of the sealing plate 26. The sealing plate 26 includes a plate body 261 and a movable wheel 262. The movable wheel 262 is rotatably mounted on the plate body 261, and the movable wheel 262 can move towards and away from the plate body 261 by translation along the axis of rotation. Referring to Figures 6 and 7, the plate 261 can move along the track 28 via the movable wheel 262, thereby changing its opening and closing state; on the other hand, when the movable wheel 262 corresponds to the position of the blind hole 231, the movable wheel 262 can be controlled to enter the blind hole 231, thereby relatively locking the positional relationship between the plate 261 and the return cylinder 23, and the plate 261 can still rotate via the movable wheel 262, thereby achieving the purpose of the sealing plate 26 falling and closing when the recycled material 3 stops being supplied.

[0044] Figure 8 shows an feasible connection between the movable wheel 262 and the plate 261. The plate 261 has a protruding cylinder 263 on its side, and the end face of the movable wheel 262 has a blind hole that mates with the cylinder 263. The movable wheel 262 can move closer to and further away from the plate 261 in the direction of the arrow in the figure by mates with the cylinder 263.

[0045] Figure 9 shows a schematic diagram of the external structure of the return cylinder 23. Two electromagnets 232 corresponding to the blind holes 231 are installed on the outer wall of the return cylinder 23. The cylinder 263 is partially or entirely made of permanent magnet material, while the movable wheel 262 is made of magnetic material. The magnetism of the electromagnet 232 after being energized is greater than that of the cylinder 263. When the electromagnet 232 is de-energized, the movable wheel 262 is magnetically attracted to the cylinder 263. After the electromagnet 232 is de-energized, the movable wheel 262 moves outward and is attracted by the electromagnet 232 as the cylinder 263 rotates. The magnetic properties of the electromagnet 232 and the cylinder 263 are not numerically limited. For example, the plate 261 and the cylinder 263 can be integrally formed by injection molding, and a permanent magnet can be pre-placed inside the cylinder 263. The movable wheel 262 is made of steel, but the specific implementation structure is not limited to the above.

[0046] Based on this, when the sealing plate 26 is in a stable closed state, the movable wheel 262 at the upper end of the sealing plate 26 is located at the blind hole 231. The electromagnet 232 can be energized to attract the movable wheel 262, maintaining the stability of the sealing plate 26. When material arrives, the electromagnet 232 is de-energized, the movable wheel 262 is attracted and reset by the cylinder 263, the relatively fixed state of the top of the sealing plate 26 is released, and the sealing plate 26 can be lifted under the action of the recycled material 3 until the recycled material 3 fills the outlet of the return cylinder 23, and the sealing plate 26 is completely lifted. At this time, the electromagnets 232 corresponding to the two blind holes 231 are energized to completely fix the sealing plate 26. When the recycled material 3 stops, After the material supply stops, the electromagnet 232 on the outer side (the side away from the pressure cylinder 22) is de-energized, and the sealing plate 26 can rotate around the central axis of the inner blind hole 231. Then, under the action of gravity, it swings towards the outlet of the return cylinder 23. The screw press 24 in the pressure cylinder 22 continues to press the recycled material 3 in the return cylinder 23 into the furnace 1. When the recycled material 3 in the return cylinder 23 is emptied, the sealing plate 26 falls completely to seal the outlet of the return cylinder 23, thereby maintaining a relatively closed state inside the furnace 1 and the protective cover 2. This can effectively reduce the supply of inert gas, and the entire device will not have any impact on the recycling process of the recycled material 3.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An anti-oxidation cast plate alloy recycling and smelting device, characterized in that, include: A furnace with an opening at the top; a protective cover, sealed at the opening of the furnace, the protective cover including a cover body, a pressure cylinder penetrating the cover body, an inflation pipe and a return cylinder disposed on the side wall of the pressure cylinder, the inflation pipe and the return cylinder both connected to the pressure cylinder; the furnace and the protective cover are filled with inert gas through the inflation pipe; a movable sealing plate is provided at the connection between the pressure cylinder and the return cylinder, the side wall of the return cylinder has a track of the same length as the sealing plate, the track is arranged at the top of the return cylinder, the two ends of the track have blind holes, the side of the sealing plate has movable wheels that can slide within the track, the movable wheels can slide through the blind holes. The relative position of the sealing plate is limited by the translation within the blind hole. A first flange limiting the sealing plate is also provided on the side wall of the return cylinder, and the first flange is arranged on the side close to the pressure cylinder. A second flange protruding on the inner wall of the return cylinder is provided, and the second flange and the top plate of the return cylinder are spaced apart to form the track. The sealing plate includes a plate body and a movable wheel. The side of the plate body has a protruding cylinder, and the movable wheel is slidably sleeved on the outside of the cylinder. An electromagnet corresponding to the blind hole is installed on the outer wall of the return cylinder. The cylinder of the sealing plate is a permanent magnet, and the movable wheel is a magnetic component. The magnetism of the electromagnet after being energized is greater than that of the cylinder.

2. The anti-oxidation cast plate alloy recycling and smelting device according to claim 1, characterized in that, The return cylinder is tilted so that the outlet of the return cylinder is at a low position.

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