System and method for copper smelting furnace heat recovery for copper preheating

Abstract

The application belongs to the technical field of waste heat recycling, and particularly relates to a system and method for recycling heat of a copper smelting furnace for copper preheating, which comprises a copper smelting furnace and a preheating box, the preheating box is installed on the upside of a feeding port at the top of the copper smelting furnace; the preheating box comprises a heating zone at the middle part and discharging zones at both sides of the heating zone, and the heating zone is communicated with the feeding port at the bottom; the application opens a closed door of the feeding port by installing the preheating box to the upside of the feeding port of the copper smelting furnace, so that the heat inside the copper smelting furnace enters the heating zone to heat waste parts inside the discharging bins at both sides, and the waste parts are purified and cleaned and the waste heat is recycled; in the preheating process of the waste parts, the application effectively utilizes the heat lost in the feeding opening process of the smelting furnace, so that the heat is effectively utilized, the heat waste is reduced, the energy consumption in the copper smelting and recycling process is reduced, and the theme of energy saving and emission reduction is met.

Description

Technical Field

[0001] This invention belongs to the field of waste heat recovery and utilization technology, specifically a system and method for heat recovery from a copper smelting furnace for copper preheating. Background Technology

[0002] Before recycling and smelting, scrap copper typically requires preheating. This step plays a crucial role in improving smelting efficiency, reducing energy consumption, minimizing pollution, and enhancing the quality of recycled copper. This is because scrap copper often has moisture (such as cleaning residue and rainwater), oil, coatings, paint, and other organic matter adhering to its surface. Direct smelting would cause the moisture to vaporize rapidly at high temperatures, potentially leading to molten metal splashing; the combustion of volatile organic compounds would produce toxic gases, polluting the environment.

[0003] Low-temperature baking evaporates moisture and decomposes organic matter, preventing splattering and harmful gases during smelting. Copper's melting point is approximately 1083℃; if the copper material is too cold, more heat is required to heat it to its melting point during smelting. Preheating allows the copper material to heat up earlier, shortening smelting time and reducing fuel or electricity consumption. Preheating also allows for partial reduction of oxides on the copper surface in a neutral or reducing atmosphere, minimizing oxidation losses during smelting.

[0004] In addition, during the recycling and processing of scrap copper, the collected scrap copper parts are generally cleaned and then sent to a copper smelting furnace. After being melted at high temperature to form molten metal, the molten metal is then transported to a mold to be processed into copper rods, plates and other parts, thus realizing the recycling of scrap copper parts. During this process, the feed port of the copper smelting furnace is usually opened, and the collected scrap parts are continuously poured in manually or mechanically to achieve feeding.

[0005] However, the open feed port during the feeding process allows the inside of the copper smelting furnace to communicate with the outside. The heat generated during the melting of scrap metal inside diffuses outward through the feed port in the form of thermal radiation and hot air flow. This not only causes heat loss from the copper smelting furnace, resulting in increased energy consumption, but also leads to a harsh working environment and increased physical exertion for the processing personnel who continuously feed scrap parts, making it difficult to continue. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a system and method for copper preheating through heat recovery in a copper smelting furnace.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention proposes a system for copper smelting furnace heat recovery for copper preheating, including a copper smelting furnace and a preheating box, wherein the preheating box is installed on the upper side of the feed inlet at the top of the copper smelting furnace;

[0008] The preheating box includes a heating zone in the middle and a discharge zone on both sides of the heating zone. The heating zone is connected to the feed inlet at the bottom. The discharge zone is provided with mounting grooves evenly arranged in the vertical direction. A discharge bin is slidably arranged inside the mounting groove. The discharge bin is connected to the heating zone. Feeding ports are provided on both sides of the preheating box at the locations corresponding to the discharge bins.

[0009] The heating zone has ventilation holes evenly distributed on the bottom inner wall, which are connected to an external air supply device. The preheating box is equipped with a closed cover, and an exhaust pipe is installed on the closed cover, which is connected to the top of the discharge hopper.

[0010] Preferably, a propulsion device is horizontally arranged at the bottom of the mounting groove, and the output end of the propulsion device is connected to the bottom of the discharge bin to realize the lateral movement of the discharge bin;

[0011] A tilting plate is provided on the side of the discharge bin near the heating zone. The tilting plate is connected to the output end of the rotating device on the side wall of the discharge bin. A moving roller is uniformly rotated at the bottom of the discharge bin. The end of the moving roller is connected to the output end of the power device on the side wall of the discharge bin.

[0012] Preferably, the tilting plate is tilted and has air inlets evenly distributed on it, the air inlets connecting the inside of the discharge bin and the heating zone.

[0013] Preferably, the bottom of the mounting groove is provided with a receiving groove in the area below the moving roller, and one end of the receiving groove near the heating zone is connected to the heating zone, and the moving roller has an elliptical cross-section.

[0014] Preferably, the two end surfaces of the moving roller are respectively provided with guide grooves, the moving roller is provided with impact holes, the two end openings of the impact holes are respectively located in the guide grooves on both sides, and the impact holes are tapered.

[0015] Preferably, the heating zone is uniformly provided with transverse limiting rods, the two ends of the limiting rods extend laterally and are connected to the side wall of the receiving groove, and the slider provided at the bottom of the feeding bin is slidably connected to the limiting rods.

[0016] Preferably, the inner wall of the top of the mounting groove away from the heating zone is uniformly provided with recycling holes, the inside of the sealing cover is provided with a recycling chamber, the recycling chamber is connected to the exhaust pipe, and the recycling holes are connected to the recycling chamber through recycling pipes.

[0017] A method for copper preheating using heat recovery from a copper smelting furnace, the method utilizing the aforementioned copper smelting furnace heat recovery system for copper preheating, the method comprising the following steps:

[0018] S1: Install the preheating box on the upper side of the feed inlet of the copper smelting furnace. Then pull out the evenly distributed discharge bins on both sides of the preheating box so that they extend outward through the feeding port. Put the scrap parts into the discharge bins. After they are full, push the discharge bins so that they slide into the mounting slots inside the preheating box.

[0019] S2: Automatically opens the closed door of the feed inlet, allowing the interior of the copper smelting furnace to communicate with the heating zone, so that the heat inside the copper smelting furnace enters the heating zone in the form of thermal radiation;

[0020] S3: Start the external air supply equipment to fill the cavity with outside air, and then let the air flow into the bottom area of ​​the heating zone through the evenly distributed vents. After being heated in the heating zone, the air flow is transferred upward to the scrap metal parts.

[0021] S4: After preheating, put the scrap parts in the discharge bin into the copper smelting furnace in sequence, empty the discharge bin, then remove the discharge bin to replenish the scrap metal, and repeat the above operation.

[0022] The beneficial effects of this invention are as follows:

[0023] The present invention discloses a system and method for copper preheating by heat recovery in a copper smelting furnace. By installing a preheating box on the upper side of the feed inlet of the copper smelting furnace, waste parts are put into the discharge bin, and the closed door of the feed inlet is opened, so that the heat inside the copper smelting furnace enters the heating zone, causing the temperature of the waste parts inside the discharge bins on both sides to rise.

[0024] Volatile oil stains and free water adhering to waste parts are converted into gas under high temperature and separated from the waste parts, thus avoiding these impurities and water vapor from hindering the process of melting waste parts into molten metal. Furthermore, by increasing the temperature of waste parts before they enter the melting furnace, they can be melted into molten metal more quickly after entering the furnace, thereby effectively improving the efficiency of waste parts melting and recycling.

[0025] In the preheating process of waste parts, this application effectively utilizes the heat lost during the charging and opening of the smelting furnace, thus making effective use of this heat, reducing heat waste, and thereby reducing energy consumption in the copper smelting and recycling process, which is in line with the theme of energy conservation and emission reduction. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a perspective view of the copper smelting furnace heat recovery system used for copper preheating in this invention;

[0028] Figure 2 This is a cross-sectional view of the preheating box in this invention;

[0029] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0030] Figure 4 This is a perspective view of the material dispensing hopper in this invention;

[0031] Figure 5 This is a perspective view of the movable roller in this invention;

[0032] Figure 6 This is a bottom view of the material dispensing hopper in this invention;

[0033] Figure 7 This is a flowchart of the method for copper preheating using heat recovery from a copper smelting furnace in this invention.

[0034] In the diagram: 1. Copper smelting furnace, 11. Feed inlet, 2. Preheating box, 21. Heating zone, 211. Vent, 22. Discharge zone, 23. Mounting slot, 231. Propulsion device, 232. Receiving slot, 233. Limiting rod, 233. Discharge bin, 24. Feed port, 241. Tilting plate, 242. Moving roller, 243. Air inlet, 244. Guide channel, 245. Impact hole, 246. Sliding block, 247. Sealing cover, 25. Exhaust pipe, 251. Recovery chamber, 252. Recovery hole, 253. Recovery pipe, 254. Gas supply device, 3. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] As shown in the attached diagram of the instruction manual. Figures 1-6 As shown, this application provides a system for copper smelting furnace heat recovery for copper preheating, including a copper smelting furnace 1 and a preheating box 2, the preheating box 2 being installed on the upper side of the feed inlet 11 at the top of the copper smelting furnace 1;

[0038] The preheating box 2 includes a heating zone 21 in the middle and a discharge zone 22 on both sides of the heating zone 21. The heating zone 21 is connected to the feed inlet 11 at the bottom. The discharge zone 22 is provided with mounting grooves 23 evenly arranged in the vertical direction. A discharge bin 24 is slidably arranged inside the mounting groove 23. The discharge bin 24 is connected to the heating zone 21. Feeding ports 241 are provided on both sides of the preheating box 2 at the locations corresponding to the discharge bins 24.

[0039] Ventilation holes 211 are evenly distributed on the inner wall of the bottom of the heating zone 21. The ventilation holes 211 are connected to the external air supply device 3. The top of the preheating box 2 is equipped with a closed cover 25, and an exhaust pipe 251 is provided on the closed cover 25. The exhaust pipe 251 is connected to the top of the discharge hopper 24. Specifically, a cavity is provided inside the base at the bottom of the preheating box 2. The air pump device, which serves as the external air supply device 3, is connected to the cavity through an air pipe. The ventilation holes 211, which are evenly distributed near the feed inlet 11 at the bottom of the heating zone 21, are connected to the cavity. When the scrap metal needs to be preheated, the external air supply device 3 is activated to fill the cavity with outside air. Then, the airflow flows into the bottom area of ​​the heating zone 21 from the evenly distributed ventilation holes 211. After being heated in the heating zone 21, the airflow is transferred upward to the scrap metal parts, improving the efficiency of heat conduction and utilization.

[0040] Specific workflow: In the process of recycling and processing scrap copper metal, the collected scrap copper parts can be sent into the copper smelting furnace 1 after simple cleaning. After being melted at high temperature to form molten metal, it is then transported to the mold to be processed into copper rods, plates and other parts, so as to realize the recycling of scrap copper metal parts. In this process, it is usually necessary to open the feed port 11 of the copper smelting furnace 1 and continuously pour the collected scrap parts in manually or mechanically to realize the feeding.

[0041] However, the open feed port 11 during the feeding process allows the interior of the copper smelting furnace 1 to communicate with the outside. The heat generated during the melting of scrap metal inside diffuses outward through the feed port 11 in the form of thermal radiation and hot air flow. This not only causes heat loss from the copper smelting furnace 1, resulting in increased energy consumption, but also leads to a harsh processing environment and increased physical exertion for the processing personnel who continuously feed scrap parts, making it difficult to continue.

[0042] In order to achieve energy conservation and emission reduction, this application can recover the heat diffused at the feed inlet 11 during the feeding process and use it in the preheating process of scrap metal. This increases the temperature of scrap metal and improves its melting efficiency, while also removing impurities and moisture from the scrap metal, making the scrap metal smelting and recycling process smoother.

[0043] Specifically, the preheating box 2 is installed on the upper side of the feed inlet 11 of the copper smelting furnace 1. Then, the discharge bins 24, which are evenly arranged on both sides of the preheating box 2, are pulled out so that they extend outward through the feeding port 241. The waste parts are put into the discharge bins 24. After they are full, the discharge bins 24 are pushed so that they slide into the mounting groove 23 inside the preheating box 2. The closed door of the feed inlet 11 is automatically opened so that the inside of the copper smelting furnace 1 is connected to the heating zone 21. This allows the heat inside the copper smelting furnace 1 to enter the heating zone 21. After the temperature inside the heating zone 21 rises, it radiates to the discharge bins 24, which are evenly arranged on both sides, causing the temperature inside the discharge bins 24 to rise. The high temperature causes the temperature of the waste parts inside the discharge bins 24 on both sides to rise.

[0044] Volatile oil stains and free water adhering to waste parts are converted into gas under high temperature and separated from the waste parts, thus avoiding these impurities and water vapor from hindering the process of melting waste parts into molten metal. Furthermore, by increasing the temperature of waste parts before they enter the melting furnace, they can be melted into molten metal more quickly after entering the furnace, thereby effectively improving the efficiency of waste parts melting and recycling.

[0045] Furthermore, in the preheating process of the waste parts in this application, the heat lost during the charging and opening of the smelting furnace is effectively utilized, so that this part of the heat is effectively utilized, heat waste is reduced, and energy consumption in the copper smelting and recycling process is reduced, which is in line with the theme of energy conservation and emission reduction.

[0046] Furthermore, in order to improve the utilization efficiency of lost heat, air can be introduced into the heating zone 21 through the vent 211 at the bottom. This air expands after being heated in the heating zone 21, which increases the internal air pressure of the heating zone 21 and flows towards the discharge zones 22 on both sides. After passing through the waste parts inside the discharge bin 24, the heated gas transfers heat to the waste parts and carries away the impurities and water vapor separated from the waste parts due to the high temperature. The gas is then guided to the external waste gas treatment equipment through the connected exhaust pipe 251, thereby reducing the impact of this waste gas on the processing environment.

[0047] During the preheating process, the scrap parts in the bottom discharge bin 24, which have been fully heated, are first put into the copper smelting furnace 1. After replenishing with new scrap parts and resetting the furnace, the scrap parts in the discharge bin 24 are put into the copper smelting furnace 1 from bottom to top until the uppermost discharge bin 24 is emptied, replenished, and reset. Then, the process is repeated in the bottommost discharge bin 24. This ensures that the scrap parts are evenly and stably fed into the copper smelting furnace 1 after being fully heated, thus reducing the possibility of violent vibrations or even copper splashing inside the copper smelting furnace 1 caused by uneven feeding.

[0048] Example 2:

[0049] Based on Embodiment 1, any technical means for recovering the hot airflow inside each mounting slot 23 that can meet the above requirements can be applied to this application. This embodiment provides a possible implementation plan. Specifically, an exhaust chamber is provided inside the top area of ​​each mounting slot 23. Recovery holes 253 are uniformly provided on the inner wall of the side of the top of the mounting slot 23 away from the heating zone 21. The recovery holes 253 communicate with the exhaust chamber. A recovery chamber 252 is provided inside the sealing cover 25. The recovery chamber 252 communicates with the exhaust pipe 251. The recovery holes 253 communicate with the recovery chamber 252 through the recovery pipe 254.

[0050] Specific workflow: Based on the specific workflow in Example 1, in order to better utilize the upward-flowing hot airflow inside the heating zone 21 to preheat the scrap metal parts located inside the mounting slot 23, the air pump connected to the exhaust pipe 251 is started simultaneously with opening the inlet 11. The airflow inside the extraction chamber is drawn into the recovery chamber 252 through the connected recovery pipe 254, thus creating a negative pressure inside the extraction chamber. This causes the airflow inside the mounting slot 23 to flow towards the recovery hole 253. Furthermore, because the recovery hole 253... Distributed at the top of the mounting groove 23 away from the heating zone 21, the hot airflow flowing upward from the heating zone 21 is diverted into the mounting groove 23. Under negative pressure, it flows laterally along the inside of the mounting groove 23 and finally enters the recycling hole 253 for recycling. During this process, the laterally flowing hot airflow has a longer flow path in the mounting groove 23, which promotes full contact between the flowing hot airflow and the scrap metal parts inside the discharge bin 24, improving the utilization efficiency of the hot airflow and improving the preheating effect of the scrap metal parts.

[0051] Example 3:

[0052] Based on Embodiment 2, a propulsion device 231 is horizontally arranged at the bottom of the mounting groove 23. The output end of the propulsion device 231 is connected to the bottom of the discharge bin 24 to realize the lateral movement of the discharge bin 24. The propulsion device 231 here can be an existing electric slide rail device to drive the discharge bin 24 to slide laterally along the bottom of the mounting groove 23. Alternatively, a horizontal electric telescopic device can be set at the bottom of the mounting groove 23, and the output end of the telescopic device is connected to the bottom of the discharge bin 24 to realize the lateral sliding of the discharge bin 24 along the mounting groove 23.

[0053] A tilting plate 242 is provided on the side of the discharge bin 24 near the heating zone 21. The bottom of the tilting plate 242 is connected to the output end of the rotating device on the side wall of the discharge bin 24 via a rotating shaft. A moving roller 243 is uniformly rotated at the bottom of the discharge bin 24. The end of the moving roller 243 is connected to the output end of the power device on the side wall of the discharge bin 24. The power device here can be a miniature motor device, which is controlled by an external controller.

[0054] Specific workflow: Based on the specific workflow in Example 2, when it is necessary to put external waste parts into the discharge bin 24 inside the mounting slot 23, control the propulsion device 231 to start, drive the discharge bin 24 to slide laterally away from the heating zone 21. After the discharge bin 24 moves to the outside, the accumulated waste parts can be put into the discharge bin 24 by manual labor or robotic arm. After the discharge bin 24 is full, control the discharge bin 24 to reset.

[0055] When the scrap parts inside the feeding bin 24 are sufficiently heated and ready to be fed into the copper smelting furnace 1, the rotating device can be directly controlled to drive the tilting plate 242 to rotate, opening the end opening of the feeding bin 24 near the heating zone 21. At the same time, the power device connected to the moving rollers 243 evenly arranged inside the feeding bin 24 is started, driving the moving rollers 243 to rotate. The rotating moving rollers 243 cause the scrap parts piled up on the upper side to be subjected to friction pointing towards the heating zone 21, causing the scrap parts piled up inside the feeding bin 24 to move towards the opening formed after the tilting plate 242 is opened, until the scrap parts pass through the opening without obstruction and fall down into the feed inlet 11 at the bottom, entering the copper smelting furnace 1 to participate in the copper smelting process. This makes the preheating and feeding process of scrap parts more automated, reducing manual intervention. In addition, during this process, the metal splashing and high-temperature gas overflow that may be caused by feeding are confined inside the preheating box 2, avoiding affecting the external environment of the copper smelting furnace 1 and causing safety accidents.

[0056] Example 4:

[0057] Based on Embodiment 3, the tilting plate 242 is tilted and air inlets 244 are evenly arranged on the tilting plate 242. The air inlets 244 connect the inside of the discharge bin 24 and the heating zone 21. The bottom of the mounting groove 23 is provided with a receiving groove 232 in the area below the moving roller 243. The receiving groove 232 is provided with a tapered hole at one end near the heating zone 21 to communicate with the heating zone 21. The moving roller 243 has an elliptical cross section.

[0058] Because the cross-section of the moving roller 243 is elliptical, the distance between different parts of the outer surface of the moving roller 243 and the central axis is not the same. Therefore, in order to facilitate the smooth rotation of the moving roller 243, the distance between adjacent moving rollers 243 is set to be large. When the moving roller 243 rotates to a horizontal state and the horizontal projection is at its maximum, the gap between adjacent moving rollers 243 is still maintained.

[0059] Specific workflow: Based on the specific workflow in Example 3, when the heating gas flowing upward inside the heating zone 21 flows to both sides, it can flow in through the air inlet 244 evenly arranged on the flip plate 242 and flow laterally along the inside of the discharge bin 24, fully flushing the accumulated waste parts inside and improving the heat of the waste parts.

[0060] When the moving roller 243 is rotated, the elliptical structure causes the height of the top of the moving roller 243 to change when different parts of the outer surface of the moving roller 243 rotate to the upper side. This causes the waste parts piled up inside the discharge bin 24 to be pushed laterally by friction, while also being pushed upward by the top of the moving roller 243. This causes the piled waste parts to be subjected to vertical impact, causing the waste parts to move vertically during the movement. It also increases the gap between the waste parts during the movement, which facilitates the inward penetration of high-temperature heating gas.

[0061] While the moving roller 243 moves to agitate the accumulated scrap metal parts inside, the rotating device connected to the tilting plate 242 can also be activated to rotate it from an inclined state to a vertical state. After reversing and resetting, it rotates and squeezes again. This repeated swinging motion impacts the accumulated scrap metal parts, causing the scrap metal parts located inside the discharge bin 24 that move close to the heating zone 21 to be agitated. This allows the scrap metal parts to flow fully in the discharge bin 24 and mix thoroughly with the incoming hot airflow, improving preheating efficiency.

[0062] As the moving roller 243 rotates, when it rotates to a vertical position and the protruding part of the moving roller 243 is located at the upper and lower ends, the gap between adjacent moving rollers 243 increases. This allows the high-temperature heating gas flowing in from the heating zone 21 to enter the receiving tank 232 and flow upward along the gap area between the moving rollers 243, so that the accumulated waste parts are subjected to a bottom-up penetrating heating effect. At the same time, the rotating moving roller 243 pushes the waste parts upward, which increases the gap between the waste parts and the bottom of the discharge bin 24. This allows the heating gas to enter the discharge bin 24 and come into contact with the tumbling waste parts, fully penetrating into the gap area of ​​the waste parts and heating them. This makes full use of the preheating energy lost during the feeding process of the copper smelting furnace 1 and improves the preheating efficiency of the waste parts.

[0063] Example 4:

[0064] Based on Embodiment 3, a horizontal limiting rod 233 is uniformly arranged inside the heating zone 21. The ends of the limiting rod 233 extend laterally and are connected to the side walls of the receiving grooves 232 on both sides. The slider 247 at the bottom of the feeding bin 24 is slidably connected to the limiting rod 233. The horizontally arranged limiting rod 233 supports and limits the moving feeding bin 24. Furthermore, the installation position of the pushing device 231 corresponds to the position of the slider 247. Therefore, the output end of the pushing device 231 can be connected to the slider 247.

[0065] Specific workflow: Based on the specific workflow in Example 3, in order to further improve the drying efficiency of the waste parts piled up in the discharge bin 24; for the discharge bin 24 containing waste parts with high moisture content, the pusher 231 can be controlled to push it into the heating zone 21 for centralized heating, thereby improving the drying efficiency.

[0066] Specifically, because the discharge bins 24 are distributed in multiple layers along the vertical direction within the discharge area 22, for the discharge bins 24 containing scrap parts that require focused heating, the connecting push device 231 of the discharge bins 24 on both sides of that layer is activated; see the attached diagram in the instruction manual. Figure 2 The two bottommost discharge bins 24 inside are close to each other until they contact each other. On the one hand, the discharge bins 24 extending into the heating zone 21 are directly above the copper smelting furnace 1 feed port 11 at the bottom of the heating zone 21, and are within the drying and heating range. The upward heat radiation can be directly transmitted to the waste parts inside through the gap between the moving rollers 243.

[0067] On the other hand, the discharge bins 24, which extend laterally on both sides and come into contact with each other in the middle of the heating zone 21, intercept the upward heating airflow, so that the heating airflow is concentrated and penetrates upward through the gap area between the moving rollers 243 into the gap of the waste parts, so that the waste parts are fully heated. Volatile impurities and moisture on the waste parts are fully discharged under the heating action, improving the preheating treatment effect of the waste parts. In this way, for waste parts that need to be heated in a concentrated manner, the combination of direct radiation heating and concentrated airflow transfer heating greatly improves the preheating treatment efficiency of these waste parts, reduces the preheating treatment time, and ensures the normal progress of the smelting and processing of waste parts.

[0068] Example 5:

[0069] Based on Embodiment 4, guide grooves 245 are respectively provided on the two end surfaces of the moving roller 243, and impact holes 246 are provided inside the moving roller 243. The openings of the two end surfaces of the impact holes 246 are respectively located in the guide grooves 245 on both sides, and the impact holes 246 are tapered.

[0070] Specific workflow: Based on the specific workflow in Embodiment 4, guide grooves 245 are provided on the protruding ends on both sides of the moving roller 243, which effectively increases the friction between the moving roller 243 and the scrap metal parts during rotation. This allows the moving roller 243 to better drive the scrap metal parts piled up on the upper side to move laterally during rotation. Furthermore, the design of the guide grooves 245 also increases the gap between the moving roller 243 and the scrap metal parts. When the moving roller 243 rotates to a vertical position, the openings on both sides of the impact hole 246 coincide with the vertical direction. The upward hot airflow flows upward along the inside of the impact hole 246, forming a concentrated impact airflow, which flows out from the guide grooves 245 on the top end of the moving roller 243 and contacts the scrap metal parts that have been lifted up and whose gaps have increased. The concentrated impact hot airflow formed by the conical hole can better penetrate into the scrap metal parts, expand the diffusion range along the gaps of the scrap metal parts, and further improve the preheating efficiency of the scrap metal parts.

[0071] Example 6:

[0072] Based on the above embodiments, as shown in the accompanying drawings of the specification. Figure 7 As shown, a method for copper preheating using heat recovery from a copper smelting furnace is described. The method utilizes the aforementioned copper smelting furnace heat recovery system for copper preheating and includes the following steps:

[0073] S1: Install the preheating box 2 on the upper side of the feed inlet 11 of the copper smelting furnace 1, then pull out the evenly arranged discharge bins 24 on both sides of the preheating box 2 so that they extend outward through the feed inlet 241, put the waste parts into the discharge bins 24, and after they are full, push the discharge bins 24 so that they slide into the mounting groove 23 inside the preheating box 2.

[0074] S2: Automatically open the closed door of the feed inlet 11, so that the inside of the copper smelting furnace 1 is connected to the heating zone 21, so that the heat inside the copper smelting furnace 1 enters the heating zone 21 in the form of thermal radiation.

[0075] S3: Start the external air supply device 3 to fill the cavity with outside air, and then let the air flow into the bottom area of ​​the heating zone 21 through the evenly distributed vents 211. After being heated in the heating zone 21, the air flow is transferred upward to the scrap metal parts.

[0076] S4: After preheating, the scrap parts in the discharge bin 24 are put into the copper smelting furnace 1 in sequence, the discharge bin 24 is emptied, and then the discharge bin 24 is pulled out to replenish the scrap metal. The above operation is repeated.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for copper preheating using heat recovery from a copper smelting furnace, characterized in that: It includes a copper smelting furnace (1) and a preheating box (2), the preheating box (2) being installed on the upper side of the feed inlet (11) at the top of the copper smelting furnace (1); The preheating box (2) includes a heating zone (21) in the middle and a discharge zone (22) on both sides of the heating zone (21). The heating zone (21) is connected to the feed inlet (11) at the bottom. The discharge zone (22) is provided with mounting grooves (23) evenly arranged in the vertical direction. A discharge bin (24) is slidably arranged inside the mounting groove (23). The discharge bin (24) is connected to the heating zone (21). Feeding ports (241) are provided on both sides of the preheating box (2) at the locations corresponding to the discharge bin (24). The heating zone (21) has ventilation holes (211) evenly arranged on the bottom inner wall. The ventilation holes (211) are connected to the external air supply equipment (3). The preheating box (2) is provided with a closed cover (25) on top. The closed cover (25) is provided with an exhaust pipe (251) and the exhaust pipe (251) is connected to the top of the discharge bin (24). A propulsion device (231) is horizontally arranged at the bottom of the mounting groove (23). The output end of the propulsion device (231) is connected to the bottom of the discharge bin (24) to realize the lateral movement of the discharge bin (24). A tilting plate (242) is provided on the side of the discharge bin (24) near the heating zone (21). The tilting plate (242) is connected to the output end of the rotating device on the side wall of the discharge bin (24). A moving roller (243) is uniformly rotated at the bottom of the discharge bin (24). The end of the moving roller (243) is connected to the output end of the power device on the side wall of the discharge bin (24). The tilting plate (242) is tilted and air inlets (244) are evenly provided on the tilting plate (242). The air inlets (244) connect the inside of the discharge bin (24) and the heating zone (21). The bottom of the mounting groove (23) is provided with a receiving groove (232) in the area below the moving roller (243). The receiving groove (232) is connected to the heating zone (21) at one end near the heating zone (21). The moving roller (243) has an elliptical cross section. The moving roller (243) has guide grooves (245) on both sides of its end surface, and an impact hole (246) is provided inside the moving roller (243). The openings of the two ends of the impact hole (246) are located in the guide grooves (245) on both sides, and the impact hole (246) is tapered.

2. The system for copper preheating using heat recovery in a copper smelting furnace according to claim 1, characterized in that: The heating zone (21) is uniformly provided with transverse limiting rods (233). The ends of the limiting rods (233) extend laterally and are connected to the side wall of the receiving groove (232). The slider (247) provided at the bottom of the feeding bin (24) is slidably connected to the limiting rods (233).

3. The system for copper preheating using heat recovery in a copper smelting furnace according to claim 1, characterized in that: The mounting groove (23) has a uniformly arranged recycling hole (253) on the inner wall of the side away from the heating zone (21) at the top. The sealing cover (25) has a recycling chamber (252) inside. The recycling chamber (252) is connected to the exhaust pipe (251). The recycling hole (253) is connected to the recycling chamber (252) through the recycling pipe (254).

4. A method for copper preheating using heat recovery from a copper smelting furnace, wherein the method for copper preheating utilizes the system for copper preheating using heat recovery from a copper smelting furnace as described in any one of claims 1-3, characterized in that, The method for preheating copper includes the following steps: S1: Install the preheating box (2) on the upper side of the feed inlet (11) of the copper smelting furnace (1), then pull out the feeding bins (24) evenly arranged on both sides of the preheating box (2) so that they extend outward through the feeding port (241), put the waste parts into the feeding bins (24), and after filling them, push the feeding bins (24) so ​​that they slide into the mounting slots (23) inside the preheating box (2); S2: Automatically open the closed door of the feed port (11) so that the inside of the copper smelting furnace (1) is connected to the heating zone (21) so that the heat inside the copper smelting furnace (1) enters the heating zone (21) in the form of thermal radiation. S3: Start the external air supply device (3) to fill the cavity with outside air, and then let the air flow into the bottom area of ​​the heating zone (21) through the evenly distributed air holes (211). After the air is heated in the heating zone (21), it is transferred upward to the scrap metal parts; S4: After the preheating is completed, the scrap parts in the discharge bin (24) are put into the copper smelting furnace (1) in sequence, the discharge bin (24) is emptied, and then the discharge bin (24) is pulled out to replenish the scrap metal. The above operation is repeated.

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