Energy-saving aluminum melting furnace with recyclable waste heat

Abstract

This energy-saving aluminum melting furnace with waste heat recovery capability relates to the field of energy-saving furnaces. It includes a furnace body, an inlet pipe, an exhaust pipe, a heat exchange device, and a cleaning device. The heat exchange device comprises a heat exchange chamber, heat exchange tubes, and heat-conducting fins. The cleaning device includes a drive assembly, a brush moving assembly, and cleaning brushes. High-temperature flue gas inside the furnace enters the heat exchange chamber through the exhaust pipe and heats the air to be introduced into the heat exchange tubes. The heated air then enters the furnace through the inlet pipe. The drive assembly drives the heat exchange tubes to rotate, and the brush moving assembly moves the cleaning brushes along guide rods. The cleaning brushes contact the outer wall of the heat exchange tubes and the heat-conducting fins to complete the cleaning.

Description

Technical Field

[0001] This invention relates to the field of energy-saving furnaces, and more particularly to energy-saving aluminum melting furnaces that can recover waste heat. Background Technology

[0002] An aluminum melting furnace is an industrial furnace developed based on the aluminum smelting process. It is mainly used to melt recycled aluminum products or aluminum alloy raw materials into a liquid state. It is necessary to build a more efficient and stable heating environment. Generally, preheated high-temperature air is continuously introduced to rapidly increase the combustion temperature of the fuel and the overall thermal efficiency.

[0003] The high-temperature flue gas discharged from aluminum melting furnaces contains a large amount of heat. To achieve energy conservation and consumption reduction, waste heat recovery devices are commonly installed to facilitate heat conduction between the high-temperature flue gas and the air to be introduced into the furnace. This allows the high-temperature flue gas to heat the air, thus achieving energy recycling. Existing waste heat recovery devices typically include heat exchange tubes and spiral heat-conducting fins. The heat-conducting fins are welded to the outside of the heat exchange tubes. The heat in the high-temperature flue gas is transferred through the tube walls to the air inside the tubes, heating the air to be introduced. The heat-conducting fins increase the heat exchange contact area and improve heat exchange efficiency.

[0004] Because the flue gas generated in the aluminum melting furnace contains a large amount of fine dust or volatile metal oxides, these substances are very easy to adhere to the heat exchange tubes and heat-conducting fins under high temperature conditions. Over a long period of time, a layer of ash will form on the surface of the heat exchange tubes and heat-conducting fins. This ash layer has a certain heat insulation effect, which reduces the efficiency of heat exchange between the high-temperature flue gas and the air to be introduced, resulting in a large amount of heat being wasted and increasing fuel consumption. Summary of the Invention

[0005] In view of this, the present invention provides an energy-saving aluminum melting furnace that can recover waste heat, which can clean the outer wall of the heat exchange tube and the heat-conducting fins, and effectively ensure the heat exchange efficiency of high-temperature flue gas and air to be introduced into the furnace.

[0006] To achieve the above objectives, the present invention provides the following technical solution: 1. An energy-saving aluminum melting furnace capable of recovering waste heat, comprising a furnace body, an air inlet pipe, an exhaust pipe, and a heat exchange device. The air inlet pipe connects to the furnace body to introduce external air, and the exhaust pipe connects to the furnace body to discharge the flue gas generated during combustion. The heat exchange device includes a heat exchange box, heat exchange tubes, and heat-conducting fins. The heat exchange box has a longitudinally continuous opening and connects to the exhaust pipe. The heat exchange tubes transversely penetrate the heat exchange box and connect to the air inlet pipe. The heat-conducting fins are distributed on the outer wall of the heat exchange tubes. Flue gas enters the heat exchange box from the exhaust pipe, heating the air flowing through the heat exchange tubes. The heat exchange tube is rotatable. This aluminum melting furnace also includes a cleaning device, which includes a drive assembly and a cleaning brush. The cleaning brush contacts the outer wall of the heat exchange tube. The drive assembly can drive the heat exchange tube to rotate so that the cleaning brush cleans the outer wall of the heat exchange tube and the heat-conducting fins.

[0007] By setting up a drive component and a cleaning brush, the drive component drives the heat exchange tube to rotate, so that the cleaning brush rotates around the heat exchange tube to clean it, thereby sweeping off the dust or metal oxides attached to the outer wall of the heat exchange tube and the heat-conducting fins. The swept dust or metal oxides are discharged with the airflow direction of the high-temperature flue gas, thus preventing the formation of a heat insulation layer on the surface of the heat exchange tube and the heat-conducting fins, effectively ensuring the heat exchange efficiency of the high-temperature flue gas and the air to be introduced into the furnace, and reducing the energy consumption and cost of the aluminum melting furnace.

[0008] 2. Based on technical solution 1, the cleaning device further includes a brush moving assembly. The heat-conducting fins are spiral-shaped and arranged around the heat exchange tube. The brush moving assembly includes a guide rod, a sliding seat, and a pair of clamping rollers. The guide rod is arranged parallel to the heat exchange tube. The sliding seat is sleeved on the guide rod and can slide along the guide rod. The pair of clamping rollers are fixed to the sliding seat and clamp one tooth of the heat-conducting fin. The cleaning brush is fixed to the sliding seat and contacts the heat exchange tube and the heat-conducting fin. When the drive assembly drives the heat exchange tube to rotate, the heat-conducting fins rotate with the heat exchange tube, which in turn drives the sliding seat to slide along the guide rod, thereby cleaning the outer wall of the heat exchange tube and the heat-conducting fins with the cleaning brush.

[0009] If the cleaning brush is fixed along the entire heat exchange tube, it occupies a large space and may obstruct the flow of flue gas. Dust or metal oxides removed during cleaning are also more likely to remain on the brush, and these residues will fall off and re-adhere to the heat exchange tube, creating a vicious cycle. By incorporating a brush moving assembly, the cleaning brush slides back and forth along the axial direction of the heat exchange tube under the action of clamping rollers as the heat exchange tube rotates. This allows for comprehensive cleaning of the entire heat exchange tube using a smaller brush, ensuring continuous flue gas flow and timely removal of dust or metal oxides, resulting in superior cleaning performance.

[0010] 3. Based on technical solution 2, elastic elements are provided on both sides of the sliding seat along the direction of the heat exchange tube. When the sliding seat moves to the end of the heat exchange tube, the elastic elements contact the inner wall of the heat exchange box to prevent the sliding seat from driving the clamping roller to exit the heat-conducting fins under vibration.

[0011] When not in operation, the brush moving assembly typically rests near the end of the heat exchange tube. Changes in flue gas flow velocity can cause mechanical vibration in the heat exchange tube, making the clamping rollers prone to sliding relative to the heat-conducting fins under the influence of this vibration. This vibration can even cause the rollers to disengage from the fins, making it difficult for them to re-engage and rendering them ineffective for cleaning. By incorporating elastic elements on both sides of the sliding seat, the sliding seat counteracts the mechanical vibration force, preventing it from coming into contact with the guide rod ends. This ensures that the clamping rollers do not detach from the heat-conducting fins under vibration, effectively guaranteeing the cleaning function.

[0012] 4. Based on technical solution 2, detection switches are provided at both ends of the guide rod. When the detection switch detects that the brush moving assembly has moved to the end of the heat exchange tube, it sends a signal to the drive assembly to stop the heat exchange tube from rotating or to reverse the rotation, so as to prevent the cleaning brush from getting stuck at the end.

[0013] The number of spiral turns of the heat-conducting fins is predetermined. The drive assembly can be set to a fixed number of rotations to prevent the sliding seat from jamming against the wall or the clamping roller from retracting from the heat-conducting fins. However, due to varying dust thickness on the heat exchange tube, slippage can occur between the clamping roller and the heat-conducting fins, causing the rotation number set by the drive assembly to be inaccurate. This can result in some areas not being cleaned or the fins jamming against the wall. By installing detection switches at both ends of the heat exchange tube, when the sliding seat touches the detection switch, the heat exchange tube is driven to stop rotating or reverse its rotation. This can promptly stop the sliding seat or change its direction of movement, effectively preventing the sliding seat from jamming against the wall or the clamping roller from retracting from the heat-conducting fins.

[0014] 5. Based on technical solution 2, two sets of auxiliary force application components are symmetrically arranged on both sides of the sliding seat along the direction of the heat exchange tube. Each set of auxiliary force application components includes a connecting rod and a force application roller. The connecting rod is connected to the sliding seat, and the force application roller is fixedly connected to the connecting rod and located on the adjacent tooth side. The adjacent tooth is the tooth of the heat-conducting fin that is adjacent to the tooth held by the clamping roller. When the clamping roller gets stuck, the heat-conducting fins are pulled and deformed by the clamping rollers. The pitch between the teeth of the heat-conducting fins clamped by the clamping rollers and the adjacent teeth changes. The force-applying roller contacts the adjacent teeth to provide auxiliary force to the sliding seat.

[0015] Because the heat-conducting fins are relatively thin, they are typically welded using local spot welding to accommodate the difference in thermal expansion between the heat exchange tube and the fins. If the cleaning brush becomes stuck with dust, the continued rotation of the heat exchange tube pulls the fins towards one end of the tube, causing them to shift towards that end. This continuous pulling can easily damage the fins. To address this, two sets of auxiliary force-applying components are symmetrically arranged on both sides of the sliding seat along the heat exchange tube direction. The fins on the opposite side of the force application experience increased spacing between adjacent teeth due to tension, while the spaced force-applying rollers contact the fins and limit their deformation, thus preventing excessive pulling.

[0016] 6. Based on technical solution 5, the connecting rod and the sliding seat are hinged to each other, and the end of the connecting rod away from the sliding seat is tilted upwards, so that it rotates to avoid the sliding seat when it approaches the inner wall of the heat exchange box.

[0017] If the spacing between the spiral units of the heat-conducting fins is small, the connecting rod may obstruct the cleaning brush from cleaning both ends of the heat exchange tube. Setting the end of the connecting rod away from the sliding seat to be tilted upwards will allow it to rotate upwards to avoid contact with the inner wall of the heat exchange box, thus ensuring that the cleaning brush cleans both ends of the heat exchange tube.

[0018] 7. Based on technical solution 2, multiple heat exchange tubes are provided. The driving assembly includes a drive motor, a transmission gear and a drive slide rail. The drive motor is connected to the heat exchange tubes through the transmission gear. The drive motor can slide on the drive slide rail and drive each heat exchange tube to rotate in sequence.

[0019] Heat exchangers typically contain multiple heat exchange tubes to improve heat exchange efficiency. Dust accumulation on the surface of these tubes is a long-term process, eliminating the need for constant cleaning of each tube. By using drive rails, a drive motor moves along these rails, sequentially rotating each heat exchange tube. This design not only eliminates the high cost of configuring a separate drive motor for each heat exchange tube but also avoids the enormous torque required for a single drive motor to simultaneously drive multiple tubes, thus improving reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an aluminum melting furnace; Figure 2 This is a schematic diagram of the heat exchange device. Figure 3 This is a schematic diagram of the heat exchange device (after removing part of the outer shell); Figure 4 for Figure 3 A structural diagram showing the heat exchanger box without its casing; Figure 5 This is a schematic diagram showing the working relationship between the cleaning device and the heat exchange device. Figure 6 for Figure 5 A structural diagram from another angle; Figure 7 This is a structural diagram of the cleaning device and auxiliary force application components.

[0021] The attached figures are labeled as follows: Furnace body 1; Air intake pipe 2, air intake port 21; Smoke exhaust pipe 3, exhaust port 31; Heat exchange device 4, heat exchange box 41, heat exchange tube 42, heat-conducting fins 4; Drive assembly 51, drive motor 511, transmission gear 512, drive slide rail 513, drive cylinder 514, cleaning brush 52, brush moving assembly 53, guide rod 531, sliding seat 532, elastic element 5321, detection switch 5322, contact block 5323, clamping roller 533. Auxiliary force application component 6, connecting rod 61, force application roller 62. Detailed Implementation

[0022] The invention will be described in detail below with reference to specific embodiments.

[0023] See Figures 1-4 The energy-saving aluminum melting furnace in this embodiment mainly includes a furnace body 1, an air inlet pipe 2, an exhaust pipe 3, and a heat exchange device 4. The air inlet pipe 2 is connected to the furnace body 1, and external air enters the furnace body 1 along the air inlet pipe 2 to provide the oxygen required for combustion in the aluminum melting furnace. The exhaust pipe 3 is connected to the furnace body 1, and the high-temperature flue gas after combustion in the furnace is discharged along the exhaust pipe 3. The heat exchange device 4 includes a heat exchange box 41, heat exchange tubes 42, and heat-conducting fins 43. The heat exchange box 41 has a longitudinal through-hole, connected to the exhaust pipe 3 at the bottom, and has an exhaust port 31 at the top. The heat exchange tubes 42 pass through the heat exchange box 41 laterally and are connected to the air inlet pipe 2. Air enters the heat exchange tubes 42 through the air inlet 21 and then enters the furnace body 1 along the air inlet pipe 2. The heat-conducting fins 43 are distributed on the outer wall of the heat exchange tubes 42. High-temperature flue gas enters the heat exchange box 41 from the exhaust pipe 3, heats the air flowing through the heat exchange tubes 42, and is discharged from the exhaust port 31 to the outside of the aluminum melting furnace.

[0024] Combination Figures 3-6 This aluminum melting furnace also includes a cleaning device, which comprises a drive assembly 51 and a cleaning brush 52. The cleaning brush 52 contacts the outer wall of the heat exchange tube 42. The drive assembly 51 can drive the heat exchange tube 42 to rotate, so that the cleaning brush 52 cleans the outer wall of the heat exchange tube 42 and the heat-conducting fins 43. The heat-conducting fins 43 are spiral-shaped and arranged around the heat exchange tube 42. See also Figures 4-7 The cleaning device also includes a brush moving assembly 53, which includes a guide rod 531, a sliding seat 532, and a pair of clamping rollers 533. The guide rod 531 is arranged parallel to the heat exchange tube 42. The sliding seat 532 is sleeved on the guide rod 531 and can slide along the guide rod 531. The pair of clamping rollers 533 are fixed to the sliding seat 532 and clamp one tooth of the heat-conducting fin 43. The cleaning brush 52 is fixed to the sliding seat 532 and contacts the heat exchange tube 42 and the heat-conducting fin 43. Figure 4 When the drive assembly 51 drives the heat exchange tube 42 to rotate, the heat-conducting fins 43 rotate with the heat exchange tube 42, thereby driving the sliding seat 532 to slide along the guide rod 531, similar to the principle of a lead screw. The cleaning brush 52 thus cleans the outer wall of the heat exchange tube 42 and the heat-conducting fins 43.

[0025] See Figure 4Multiple heat exchange tubes 42 can be installed to increase the contact area between air and high-temperature flue gas and improve heat exchange efficiency. The drive assembly 51 includes a drive motor 511, a transmission gear 512, a drive slide rail 513, and a drive cylinder 514. The drive motor 511 is connected to the heat exchange tubes 42 through the transmission gear 512. The drive cylinder 514 can extend and retract to engage or disengage the transmission gear 512. The drive motor 511 can slide on the drive slide rail 513 to drive each heat exchange tube 42 to rotate in sequence.

[0026] By setting up a cleaning device, the drive motor 511 drives the heat exchange tube 42 to rotate through the transmission gear 512. When the heat exchange tube 42 rotates, the cleaning brush 52 slides back and forth along the axial direction of the heat exchange tube 42 under the action of the clamping roller 533, thereby sweeping off the dust or metal oxides attached to the outer wall of the heat exchange tube 42 and the heat-conducting fins 43. The swept dust or metal oxides are discharged with the airflow direction of the high-temperature flue gas, thereby preventing the formation of a heat insulation layer on the surface of the heat exchange tube 42 and the heat-conducting fins 43, effectively ensuring the heat exchange efficiency of the high-temperature flue gas and the air to be introduced into the furnace, and reducing the energy consumption and cost of the aluminum melting furnace.

[0027] When not in operation, the brush moving assembly 53 is typically positioned near the end of the heat exchange tube 42. The heat exchange tube 42 may experience mechanical vibration due to changes in flue gas flow velocity. Under the influence of this vibration, the clamping roller 533 may easily slide relative to the heat-conducting fins 43, or even disengage from the fins. Once disengaged, the clamping roller 533 is difficult to re-engage with the heat-conducting fins 43, thus losing its cleaning function. See also... Figure 6 and Figure 7 The sliding seat 532 is provided with elastic elements 5321 on both sides along the direction of the heat exchange tube 42. When the sliding seat 532 moves to the end of the heat exchange tube 42, the elastic elements 5321 contact the inner wall of the heat exchange box 41. The elastic elements 5321 apply force to make the sliding seat 532 rebound and maintain a certain distance from the end of the guide rod 531, so that the sliding seat 532 cannot exceed the distribution range of the heat-conducting fins 43. This can prevent the sliding seat 532 from driving the clamping roller 533 out of the heat-conducting fins 43 under vibration.

[0028] The number of spiral turns of the heat-conducting fins 43 is set, and the drive motor 511 can be set to a fixed number of rotations to prevent the sliding seat 532 from hitting the wall and getting stuck, or the clamping roller 533 from retracting from the heat-conducting fins 43. However, due to the varying thickness of dust adhering to the heat exchange tube 42, slippage may occur between the clamping roller 533 and the heat-conducting fins 43, causing the rotation number set by the drive assembly 51 to be inaccurate, resulting in the possibility that some areas may not be cleaned or may hit the wall and get stuck. Figure 6 and Figure 7The guide rod 531 has detection switches 5322 at both ends. The detection switches 5322 can also be fixed to the inner wall of the heat exchange chamber 41. When the detection switch 5322 detects that the brush moving assembly 53 has moved to the end of the heat exchange tube 42, it sends a signal to the drive assembly 51 to stop or reverse the rotation of the heat exchange tube 42, preventing the cleaning brush 52 from getting stuck at the end. If the elastic element 5321 is a spring, contact blocks 5323 can be provided on both sides of the sliding seat 532 along the direction of the heat exchange tube 42, corresponding to the positions of the detection switches 5322. When the brush moving assembly 53 moves to the end of the heat exchange tube 42, the contact blocks 5323 contact the detection switches 5322 to achieve sensing, thereby improving the accuracy of the detection.

[0029] Because the heat-conducting fins 43 are relatively thin, they are typically welded using local spot welding to accommodate the difference in thermal expansion between the heat exchange tube 42 and the heat-conducting fins 43. If the cleaning brush 52 or clamping roller 533 becomes stuck due to dust, the continued rotation of the heat exchange tube 42 will pull the heat-conducting fins 43 towards one end of the heat exchange tube 42. This will cause the heat-conducting fins 43 to shift towards one end of the heat exchange tube 42, and under continuous pulling, the heat-conducting fins 43 are easily damaged. (See also...) Figure 6 and Figure 7 Two sets of auxiliary force-applying components 6 are symmetrically arranged on both sides of the sliding seat 532 along the direction of the heat exchange tube 42. Each set of auxiliary force-applying components 6 includes a connecting rod 61 and a force-applying roller 62. One end of the connecting rod 61 is hinged to the sliding seat 532, and the other end is fixedly connected to the force-applying roller 62. The force-applying roller 62 is located on the adjacent tooth side, where the adjacent tooth is the tooth of the heat-conducting fin 43 adjacent to the tooth clamped by the clamping roller 533. When the clamping roller 533 jams, the heat-conducting fin 43 is pulled and deformed by the clamping roller 533, and the pitch between the tooth clamped by the clamping roller 533 and the adjacent tooth on the heat-conducting fin 43 changes. The force-applying roller 62 contacts the adjacent tooth to provide auxiliary force to the sliding seat 532. By symmetrically arranging two sets of auxiliary force application components 6 on both sides of the sliding seat 532 along the direction of the heat exchange tube 42, the heat-conducting fins 43 at the opposite end of the force are stretched, causing the distance between two adjacent teeth to increase. The force application rollers 62 with a certain spacing will contact the heat-conducting fins 43 and limit the deformation of the heat-conducting fins 43, thereby preventing the heat-conducting fins 43 from being stretched excessively.

[0030] Furthermore, the end of the connecting rod 61 away from the sliding seat 532 is tilted upwards, and can rotate upwards when it contacts the inner wall of the heat exchange box 41. When the spacing between the spiral units of the heat-conducting fins 43 is small, the heat-conducting fins 43 near the end can be cleaned by rotating to avoid them.

[0031] The overall workflow of this invention is as follows: After the high-temperature flue gas in the furnace is discharged along the exhaust pipe 3, it enters the heat exchange box 41. The heat of the high-temperature flue gas is transferred to the air to be introduced into the heat exchange tube 42 through the heat-conducting fins 43 and the heat exchange tube 42. The heated air enters the furnace along the air inlet pipe 2 to provide combustion energy for the aluminum melting furnace.

[0032] The drive motor 511 starts periodically and drives the heat exchange tube 42 to rotate via the transmission gear 512. The heat-conducting fins 43 rotate accordingly, and the clamping roller 533 slides relative to them. Under the action of the clamping roller 533, the sliding seat 532 drives the cleaning brush 52 to slide along the guide rod 531, and the cleaning brush 52 gradually cleans the entire heat exchange tube 42 and the heat-conducting fins 43. When the sliding seat 532 approaches the end of the guide rod 531, the connecting rod 61 rotates upward so that the cleaning brush 52 continues to move towards the end of the heat exchange tube 42. When the sliding seat 532 slides to the end of the guide rod 531, the elastic element 5321 touches the inner wall of the heat exchange box 41, the contact block 5323 touches the monitoring switch, and the drive motor 511 stops rotating or rotates in the opposite direction.

[0033] If the clamping roller 533 or cleaning brush 52 gets stuck with the heat-conducting fin 43, the force-applying roller 62 will contact the adjacent tooth of the clamping roller 533 to prevent the heat-conducting fin 43 from being pulled excessively.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created by the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created by the present invention without departing from the essence and scope of the technical solutions created by the present invention.

Claims

1. An energy-saving aluminum melting furnace capable of recovering waste heat, comprising a furnace body, an air inlet pipe, an exhaust pipe, and a heat exchange device. The air inlet pipe connects to the furnace body to introduce external air into the furnace body, and the exhaust pipe connects to the furnace body to discharge the flue gas generated during combustion. The heat exchange device includes a heat exchange box, heat exchange tubes, and heat-conducting fins. The heat exchange box has a longitudinally through-hole and connects to the exhaust pipe. The heat exchange tubes transversely penetrate the heat exchange box and connect to the air inlet pipe. The heat-conducting fins are distributed on the outer wall of the heat exchange tubes. Flue gas enters the heat exchange box from the exhaust pipe, heating the air flowing through the heat exchange tubes. Its features are: The heat exchange tube is rotatable. This aluminum melting furnace also includes a cleaning device, which includes a drive assembly and a cleaning brush. The cleaning brush contacts the outer wall of the heat exchange tube. The drive assembly can drive the heat exchange tube to rotate so that the cleaning brush cleans the outer wall of the heat exchange tube and the heat-conducting fins.

2. The aluminum melting furnace according to claim 1, characterized in that: The cleaning device also includes a brush moving assembly. The heat-conducting fins are spiral-shaped and arranged around the heat exchange tube. The brush moving assembly includes a guide rod, a sliding seat, and a pair of clamping rollers. The guide rod is arranged parallel to the heat exchange tube. The sliding seat is sleeved on the guide rod and can slide along the guide rod. The pair of clamping rollers are fixed to the sliding seat and clamp one tooth of the heat-conducting fin. The cleaning brush is fixed to the sliding seat and contacts the heat exchange tube and the heat-conducting fin. When the drive assembly drives the heat exchange tube to rotate, the heat-conducting fins rotate with the heat exchange tube, which in turn drives the sliding seat to slide along the guide rod, thereby cleaning the outer wall of the heat exchange tube and the heat-conducting fins with the cleaning brush.

3. The aluminum melting furnace according to claim 2, characterized in that: The sliding seat is equipped with elastic elements on both sides along the direction of the heat exchange tube. When the sliding seat moves to the end of the heat exchange tube, the elastic elements contact the inner wall of the heat exchange box to prevent the sliding seat from driving the clamping roller out of the heat-conducting fins under vibration.

4. The aluminum melting furnace according to claim 2, characterized in that: The guide rod is equipped with detection switches at both ends. When the detection switch detects that the brush moving assembly has moved to the end of the heat exchange tube, it sends a signal to the drive assembly to stop the heat exchange tube from rotating or to reverse its rotation, so as to prevent the cleaning brush from getting stuck at the end.

5. The aluminum melting furnace according to claim 2, characterized in that: Two sets of auxiliary force application components are symmetrically arranged on both sides of the sliding seat along the direction of the heat exchange tube. Each set of auxiliary force application components includes a connecting rod and a force application roller. The connecting rod is connected to the sliding seat, and the force application roller is fixedly connected to the connecting rod and located on the adjacent tooth side. The adjacent tooth is the tooth of the heat-conducting fin that is adjacent to the tooth held by the clamping roller. When the clamping roller gets stuck, the heat-conducting fins are pulled and deformed by the clamping rollers. The pitch between the teeth of the heat-conducting fins clamped by the clamping rollers and the adjacent teeth changes. The force-applying roller contacts the adjacent teeth to provide auxiliary force to the sliding seat.

6. The aluminum melting furnace according to claim 5, characterized in that: The connecting rod is hinged to the sliding seat, with the end away from the sliding seat tilted upwards. It rotates to avoid the sliding seat when it approaches the inner wall of the heat exchange box.

7. The aluminum melting furnace according to claim 2, characterized in that: The heat exchange tubes are arranged in multiple sections. The drive assembly includes a drive motor, a transmission gear, and a drive slide rail. The drive motor is connected to the heat exchange tubes through the transmission gear. The drive motor can slide on the drive slide rail and drive each heat exchange tube to rotate in sequence.

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