A combined smelting furnace

Abstract

The application discloses a combined smelting furnace, and relates to the technical field of smelting furnaces, which comprises support legs, a lifting frame arranged above the support legs, a smelting furnace body arranged on the inner side of the support legs, a preheating box arranged on the top of the lifting frame, a sliding adjusting assembly arranged on the inner side of the lifting frame, a switching and conducting assembly connected to the bottom of the sliding adjusting assembly, and a hanging assembly arranged on the outer wall of one side of the support legs. The combined smelting furnace effectively realizes self-cleaning and anti-blocking of molten slag through the folding inertial separation structure, so that the device has the technical effects of guaranteeing continuous operation and improving processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of smelting furnace technology, and more particularly to a combined smelting furnace. Background Technology

[0002] A smelting furnace is a smelting device that melts metal raw materials into a liquid state. During the smelting process, preheating the metal raw materials is beneficial to the smelting efficiency of the furnace. Combined smelting furnaces can utilize the waste heat generated during furnace operation, effectively saving smelting energy.

[0003] However, in existing combined smelting furnaces, only the full utilization of the waste heat of the smelting furnace is taken into account, without isolating the small slag particles in the high-temperature flue gas. These small slag particles will enter the connecting pipes and even the preheating box with the high-temperature flue gas, causing adhesion. They not only easily accumulate and block the pipes, but also stubbornly stick to the inner wall of the preheating box after cooling, making them difficult to remove and causing trouble for subsequent cleaning.

[0004] For example, during the operation of a smelting furnace, large slag particles are generally not carried upwards by the flue gas. However, the impact of charging, local overheating and boiling of the molten pool, and the scouring of the slag layer by the burner airflow can directly "throw" semi-molten fine slag droplets into the flue gas flow. In addition, aluminum undergoes volatilization and oxidation of fine Al2O3 powder above 1200℃. This is even more true for Zn, Pb, and As, which have high vapor pressure. When they enter the flue gas, they are in a gaseous state. After entering the low-temperature section, they condense into fine oxide particles. When mixed with fly ash, they form nodules with a hardness comparable to concrete, which is the number one cause of flue gas blockage in metallurgical furnaces. Summary of the Invention

[0005] This invention discloses a combined melting furnace, which aims to solve the technical problem that existing combined melting furnaces only consider the full utilization of the waste heat of the melting furnace, without isolating the small slag particles in the high-temperature flue gas. These small slag particles will enter the connecting pipes and even the preheating box with the high-temperature flue gas, causing adhesion. They not only easily accumulate and block the pipes, but also stubbornly stick to the inner wall of the box after cooling, making them difficult to remove and causing troublesome subsequent cleaning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A combined smelting furnace includes a support leg and a lifting frame disposed above the support leg. The furnace body is disposed on the inner side of the support leg. A preheating box is disposed on the top of the lifting frame. A sliding adjustment component is disposed on the inner side of the lifting frame. A transfer and conduction component is connected to the bottom of the sliding adjustment component. The transfer and conduction component is located between the furnace body and the preheating box. A hanging component is disposed on one outer wall of the support leg. The connecting and connecting assembly includes a connecting cylinder disposed at the bottom of the sliding adjustment assembly. The inner side of the connecting cylinder is provided with an inner support plate. The inner support plate has a through hole at its center. The inner wall of the through hole is provided with an integrally connected top cover and bottom cover. The outer wall of the bottom cover is provided with a first side hole evenly distributed, and the outer wall of the top cover is provided with a second side hole evenly distributed. The bottom end of the connecting cylinder is connected to the top of the connecting cylinder through the first side hole and the second side hole. The connecting cylinder is used in conjunction with the furnace body.

[0007] In this solution, a transfer and conveying component is used to transfer and transport high-temperature flue gas. Compared with traditional direct connection and conveying, this method can more effectively isolate small molten slag particles in the high-temperature flue gas. In actual use, the small molten slag particles will enter the connecting cylinder along with the high-temperature flue gas. First, they will be blocked by the inner support plate inside the connecting cylinder, and then their flow direction will be changed to enter the first side hole. After entering the first side hole, they will continue to rise and be blocked by the top baffle. The flue gas will then descend a short distance and exit through the second side hole on the side of the top baffle before rising again. With the change of the flow direction of multiple flue gas flows, the small molten slag particles inside the flue gas will gradually adhere to the inside of the connecting cylinder. After being blocked, the flue gas finally enters the preheating box, where the residual heat of the high-temperature flue gas is used to preheat the metal material to be melted. Because the connecting cylinder is connected and matched with the furnace body, under the action of high temperature, the molten slag adhering to the connecting cylinder will fall back into the furnace body below as the melting temperature rises. This will not cause pipe blockage as the service life increases, and a large number of molten slag particles will not enter the preheating box.

[0008] In a preferred embodiment, the sliding adjustment assembly includes a slide groove disposed on the inner wall of the lifting frame, a slide block slidably connected to the inner wall of the slide groove, a mounting plate at the bottom of the slide block, a fixing hole on the inner side of the slide groove, a groove surround plate at the top of the mounting plate that fits into the inner side of the fixing hole, screws at the four corners of the bottom outer wall of the mounting plate, the mounting plate being fixed to the slide block by the screws, a fourth hydraulic rod on one inner wall of the lifting frame, the piston end of the fourth hydraulic rod being connected to one outer wall of the slide block, a connecting pipe head at the bottom of the preheating box, an internal channel on the inner side of the connecting pipe head, a filter plate on the inner side of the groove surround plate, a connecting hole on the inner side of the mounting plate, and a connecting cylinder communicating with the top of the slide block through the connecting hole.

[0009] The sliding adjustment component allows the connecting cylinder in the adapter and the filter plate in the slotted enclosure to slide together to a limited position. After a certain period of use, the sliding adjustment component can be used to move the connecting cylinder and the filter plate to the other side of the support leg, making it easy to disassemble, clean, and maintain.

[0010] In a preferred embodiment, the suspension assembly includes a winding frame disposed on one side of the support leg, a winding roller connected to the inner wall of the winding frame via bearings, a motor disposed on one side of the winding frame, one end of the output shaft of the motor being connected to the winding roller, a steel wire rope wound inside the winding roller, a lifting lug disposed on one side of the furnace body, the free end of the steel wire rope being attached to the outer wall of the lifting lug, and rotating shafts disposed on both sides of the furnace body, one side of each of the two rotating shafts being connected to the inner side of the support leg via bearings.

[0011] When the molten steel needs to be poured out after smelting, the motor starts to drive the roller to rotate, and the winding steel wire rope pulls the lifting lug on one side of the furnace body upward, so that the furnace body can be tilted smoothly around the shaft on the other side. This achieves precise electronic control of the furnace tilting angle, which not only makes it easier to control the pouring flow rate, but also effectively avoids the risks of manual operation in high-temperature working environments, and improves the safety and convenience of the molten steel discharge operation.

[0012] In a preferred embodiment, each of the support legs is provided with a connecting platform on its outer wall, and each of the two connecting platforms is provided with a support group. Each support group consists of two limiting rods and a third hydraulic rod. The top end of the third hydraulic rod is connected to the bottom of the lifting frame. Limiting holes are provided on both sides of the outer wall of the bottom of the lifting frame, and the limiting rods are movably connected to the inner wall of the limiting holes.

[0013] When adjusting the relative height between the preheating box and the furnace body, the third hydraulic rod extends and retracts to drive the lifting frame to rise and fall as a whole. At the same time, the limiting hole at the bottom of the lifting frame slides axially along the limiting rod in the support group, forming a strict linear guide constraint. This structure effectively prevents the lifting frame from shaking or shifting during the lifting process, ensuring that the connecting pipe head at the bottom of the preheating box can always be accurately aligned with the transition and conduction components, maintaining the sealing and stability of the flue gas conveying channel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a combined melting furnace proposed in this invention.

[0015] Figure 2 This is a schematic diagram of the roller installation structure of a combined melting furnace proposed in this invention.

[0016] Figure 3 This is a cross-sectional view of the furnace body structure of a combined melting furnace proposed in this invention.

[0017] Figure 4 This is a diagram showing the slide installation structure of a combined melting furnace proposed in this invention.

[0018] Figure 5 This is a schematic diagram of the connection pipe installation structure of a combined melting furnace proposed in this invention.

[0019] Figure 6 This is a diagram showing the filter plate installation structure of a combined melting furnace proposed in this invention.

[0020] Figure 7 This is a schematic diagram of the connecting cylinder installation structure of a combined melting furnace proposed in this invention.

[0021] Figure 8 This is a front cross-sectional view of the connecting cylinder of a combined melting furnace proposed in this invention.

[0022] Figure 9 For the present invention in Figure 8 A magnified structural diagram of point A in the middle.

[0023] Figure 10 This is a schematic diagram of the internal structure of the preheating box of a combined melting furnace proposed in this invention.

[0024] In the diagram: 1. Support leg; 2. Furnace body; 201. Shell; 202. Insulation layer; 203. Inner liner of crucible; 204. Edge; 3. Lifting frame; 4. Preheating box; 5. First hydraulic rod; 6. Connecting frame; 7. Top frame; 8. Connecting rod; 9. Second hydraulic rod; 10. Rotating shaft; 11. Third hydraulic rod; 12. Limiting rod; 13. Roller; 14. Motor; 15. Wire rope; 16. Burner; 17. Interface; 18. Lifting lug; 19. Support rod; 20. Fourth hydraulic rod; 21. Slide; 22. Connecting sleeve; 23. Connecting pipe head; 24. Internal channel; 25. Filter plate; 26. Mounting plate; 27. Screw; 28. Inner support plate; 29. ​​Bottom cover; 30. Top cover; 31. First side hole; 32. Second side hole; 33. Push plate; 34. Cover plate; 35. Guide cover; 36. Air inlet. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figures 1 to 10 A combined smelting furnace includes a support leg 1 and a lifting frame 3 disposed above the support leg 1. The inner side of the support leg 1 is provided with a furnace body 2. The top of the lifting frame 3 is provided with a preheating box 4. The inner side of the lifting frame 3 is provided with a sliding adjustment component. The bottom of the sliding adjustment component is connected to a transfer and conduction component. The transfer and conduction component is located between the furnace body 2 and the preheating box 4. A hanging component is provided on one outer wall of the support leg 1. The connecting and connecting assembly includes a connecting cylinder 22 disposed at the bottom of the sliding adjustment assembly. The inner side of the connecting cylinder 22 is provided with an inner support plate 28. The inner support plate 28 has a through hole at the center. The inner wall of the through hole is provided with an integrally connected top cover 30 and bottom cover 29. The outer wall of the bottom cover 29 is provided with a first side hole 31 evenly distributed, and the outer wall of the top cover 30 is provided with a second side hole 32 evenly distributed. The bottom end of the connecting cylinder 22 is connected to the top of the connecting cylinder 22 through the first side hole 31 and the second side hole 32. The connecting cylinder 22 is used in conjunction with the furnace body 2.

[0027] Specifically, the high-temperature flue gas is transferred and transported through a set transfer and conduction component. Compared with the traditional direct docking transport, it can more effectively isolate small molten slag particles in the high-temperature flue gas. In actual use, the small molten slag particles will enter the connecting cylinder 22 along with the high-temperature flue gas. First, they will be blocked by the inner support plate 28 inside the connecting cylinder 22. Then, the flow direction will be changed and they will enter the first side hole 31. After entering the first side hole 31, the upward process will be blocked again by the top baffle 30. After the flue gas descends for a while, it will exit through the second side hole 32 on the side of the top baffle 30 and then rise again. As the flow direction of multiple flue gas streams changes, small slag particles inside the flue gas gradually adhere to the inside of the connecting cylinder 22. After being blocked, the flue gas finally enters the preheating box 4, where the residual heat of the high-temperature flue gas is used to preheat the metal material to be melted. Because the connecting cylinder 22 is connected and fitted to the furnace body 2, under the action of high temperature, the slag adhering to the connecting cylinder 22 will fall back into the furnace body 2 below as the melting temperature rises. This will not cause pipe blockage as the service life increases, and a large number of slag particles will not enter the preheating box 4.

[0028] The inner support plate 28 is configured as a funnel-shaped structure, the top of the bottom baffle 29 is configured as a truncated cone structure, and the top baffle 30 is configured as a hollow truncated cone structure. The inner support plate 28, the bottom baffle 29, and the top baffle 30, whether it is the funnel-shaped inner support plate 28, the bottom baffle 29 with a truncated cone structure on the top, or the hollow truncated cone structure of the top baffle 30, all have a downward-sloping contour structure in the path direction of contact with the flue gas. As the high temperature of the furnace body 2 continues, the slag that initially adheres to the connecting cylinder 22 with the flue gas will more easily detach and fall into the interior of the furnace body 2, saving the trouble of separate cleaning.

[0029] Reference Figure 4 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, the sliding adjustment assembly includes a slide groove disposed on the inner wall of the lifting frame 3. A slide seat 21 is slidably connected to the inner wall of the slide groove. A mounting plate 26 is provided at the bottom of the slide seat 21. A fixing hole is provided on the inner side of the slide groove. A groove surround plate is provided at the top of the mounting plate 26. The groove surround plate is adapted to the inner side of the fixing hole. Screws 27 are provided at the four corners of the bottom outer wall of the mounting plate 26. The mounting plate 26 is fixed to the slide seat 21 by the screws 27. A fourth hydraulic rod 20 is provided on one inner wall of the lifting frame 3. The piston end of the fourth hydraulic rod 20 is connected to one outer wall of the slide seat 21. A connecting pipe head 23 is provided at the bottom of the preheating box 4. An internal channel 24 is provided on the inner side of the connecting pipe head 23. A filter plate 25 is provided on the inner side of the groove surround plate. The connecting cylinder 22 is connected to the top of the slide seat 21 through the connecting hole.

[0030] It should be noted that a high-temperature resistant rubber ring is wrapped around the bottom edge of the connecting pipe head 23. When the filter plate 25 slides down to the bottom of the connecting pipe head 23 along with the slide block 21, the connecting pipe head 23 can form a compression seal with the filter plate 25 by means of the high-temperature resistant rubber ring, so as to prevent the flue gas from escaping from this part. The filter plate 25 used is a metal plate with staggered filter holes, which is mainly used to assist in filtering some smaller slag particles.

[0031] Specifically, by using the sliding adjustment component, the connecting cylinder 22 in the transfer and conduction component and the filter plate 25 in the groove enclosure can be slidably limited together. After a certain period of use, the connecting cylinder 22 and the filter plate 25 can be moved to the other side of the support leg 1 by using the sliding adjustment component, which is convenient for disassembly, cleaning and maintenance.

[0032] Reference Figure 2 and Figure 3 In a preferred embodiment, the hanging assembly includes a winding frame disposed on one side of the support leg 1. A winding roller 13 is connected to the inner wall of the winding frame via a bearing. A motor 14 is disposed on one side of the winding frame. One end of the output shaft of the motor 14 is connected to the winding roller 13. A steel wire rope 15 is wound inside the winding roller 13. A lifting lug 18 is disposed on one side of the furnace body 2. The free end of the steel wire rope 15 is attached to the outer wall of the lifting lug 18. A rotating shaft 10 is disposed on both sides of the furnace body 2. One side of each rotating shaft 10 is connected to the inner side of the support leg 1 via a bearing.

[0033] Specifically, when the molten steel needs to be poured out after smelting, the motor 14 starts to drive the roller 13 to rotate, and the winding wire rope 15 pulls the lifting lug 18 on one side of the furnace body 2 upward, so that the furnace body 2 can be tilted smoothly around the rotating shaft 10 on the other side. This achieves precise electronic control of the furnace tilt angle, which not only facilitates the control of the pouring flow rate, but also effectively avoids the risks of manual operation in high-temperature working environments, and improves the safety and convenience of the draining operation.

[0034] The furnace body 2 consists of a shell 201, a heat insulation layer 202, and a crucible liner 203. The top of the crucible liner 203 has an upwardly extending rim 204. The connecting cylinder 22 is adapted to the inner wall of the rim 204. A burner 16 is located below the crucible liner 203. An interface 17 is provided on one outer wall of the shell 201, which is connected to the burner 16. After the connecting cylinder 22 and the adapted rim 204 are inserted into each other, the high-temperature flue gas in the furnace can rise steadily through the connecting cylinder 22. During this process, the heated burner 16 mainly supplies heat through gas combustion, while auxiliary gas is introduced for fire control. At the same time, the multi-layer composite structure of the shell 201 and the heat insulation layer 202 effectively prevents heat loss to the outside. Combined with the sealed connection at the rim 204, the thermal energy utilization rate is significantly improved, and the positioning accuracy of the transfer and conduction components during docking is ensured.

[0035] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, each of the outer walls of the support leg 1 is provided with a connecting platform, and each of the two connecting platforms is provided with a support group. Each support group consists of two limiting rods 12 and a third hydraulic rod 11. The top end of the third hydraulic rod 11 is connected to the bottom of the lifting frame 3. Limiting holes are provided on both sides of the outer wall of the bottom of the lifting frame 3, and the limiting rods 12 are movably connected to the inner wall of the limiting holes.

[0036] Specifically, when adjusting the relative height between the preheating box 4 and the furnace body 2, the third hydraulic rod 11 extends and retracts to drive the lifting frame 3 to rise and fall as a whole. At the same time, the limiting hole at the bottom of the lifting frame 3 slides axially along the limiting rod 12 in the support group, forming a strict linear guide constraint. This structure effectively prevents the lifting frame 3 from shaking or shifting during the lifting process, ensuring that the connecting pipe head 23 at the bottom of the preheating box 4 can always be accurately aligned with the transfer and conduction assembly, maintaining the sealing and stability of the flue gas conveying channel.

[0037] Reference Figure 1 , Figure 5 and Figure 10In a preferred embodiment, the lifting frame 3 has top frames 7 on both sides, and a connecting rod 8 between the two top frames 7. Two movable seats are sleeved on the outer wall of the connecting rod 8, and a second hydraulic rod 9 is provided on each of the two movable seats. The top of the preheating box 4 is provided with a cover plate 34, and two fixed seats are provided on the top of the cover plate 34. Movable heads are provided on the top of the two fixed seats. The piston ends of the two second hydraulic rods 9 are respectively connected to the two movable heads. The lifting frame 3 is also connected to the two sides with horizontally arranged first hydraulic rods 5. The piston ends of the two first hydraulic rods 5 are connected to the same connecting frame 6. A support rod 19 is provided on one side of the connecting frame 6. One end of the support rod 19 passes through the preheating box 4 and is connected to a push plate 33. The push plate 33 is adapted to the inner side of the preheating box 4. A guide cover 35 is provided on one side of the inner wall of the preheating box 4. The internal channel 24 communicates with the guide cover 35. The guide cover 35 is used to guide hot flue gas into the preheating box 4. A vent 36 is provided on one side of the top outer wall of the preheating box 4.

[0038] Specifically, during the preheating process, the high-temperature flue gas, filtered by the transfer and conduction components, enters the guide hood 35 through the built-in channel 24 and is laterally guided into the preheating box 4 through one side inner wall, allowing for sufficient heat exchange with the stacked metal materials to achieve preheating. The flue gas after heat exchange is uniformly discharged through the top vent 36, where an external flue gas purification device can be connected to effectively prevent the direct emission of harmful gases and meet environmental protection production requirements. After smelting is completed, the molten steel inside is poured out using the hanging components, and at the same time, the cover plate 34 of the preheating box 4 is opened, and mechanical grabbing is used to... The structure grabs the preheated metal material and feeds it into the furnace body 2. The cover plate 34 on the top of the preheating box 4 is opened, and the first hydraulic rod 5 drives the support rod 19 to move forward through the connecting frame 6. This drives the push plate 33 to gather the preheated metal material in the preheating box 4 towards the discharge port side, making it easy for the mechanical gripper to quickly grab and feed the material into the furnace body 2. Then the push plate 33 is reset, and a new batch of material to be preheated is filled in. The reciprocating push of the push plate 33 keeps the material in the preheating box 4 full, achieving seamless connection and continuous and efficient operation of the smelting and preheating processes.

[0039] Working principle: During use, the burner 16 is started to heat and melt the metal raw materials in the furnace body 2. The generated high-temperature flue gas carries a small amount of fine slag upwards. The third hydraulic rod 11 is started to drive the lifting frame 3 to descend, so that the high-temperature resistant rubber ring at the bottom of the connecting pipe head 23 is pressed tightly against the filter plate 25 to form a seal. At the same time, the bottom of the connecting cylinder 22 is inserted into the edge 204 at the top of the crucible inner liner 203. The high-temperature flue gas first enters the connecting cylinder 22, and its flow direction is changed by the obstruction of the inner support plate 28. After rising through the first side hole 31, it is repeatedly deflected by the bottom baffle 29 and the top baffle 30. The small slag particles are adsorbed on the cylinder wall by the inertial separation principle and periodically fall off back into the molten pool under the action of high temperature. After filtration, Clean flue gas is introduced laterally into the preheating box 4 through the built-in channel 24 and the guide hood 35 to preheat the metal material. After heat exchange, it is discharged through the air outlet 36. After preheating, the cover plate 34 is opened and the first hydraulic rod 5 drives the push plate 33 to gather the preheated material towards the discharge port, so that the mechanical gripper can grab it and put it into the furnace body 2. Then the push plate 33 is reset and new material is filled in to keep the material in the preheating box 4 full. After smelting, the motor 14 drives the winding roller 13 to wind up the steel wire rope 15 and pull the furnace body 2 to tilt around the rotating shaft 10 to complete the liquid pouring. After long-term use, the fourth hydraulic rod 20 pushes the slide 21 to move horizontally, moving the connecting cylinder 22 and the filter plate 25 to the outside of the support leg 1 for easy disassembly, cleaning and maintenance.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combined smelting furnace, comprising a support leg (1) and a lifting frame (3) disposed above the support leg (1), wherein a furnace body (2) is disposed on the inner side of the support leg (1), and a preheating box (4) is disposed on the top of the lifting frame (3), characterized in that, The inner side of the lifting frame (3) is provided with a sliding adjustment component, and the bottom of the sliding adjustment component is connected to a transfer and conduction component. The transfer and conduction component is located between the furnace body (2) and the preheating box (4). A hanging component is provided on one side of the outer wall of the support leg (1). The connecting and connecting assembly includes a connecting cylinder (22) disposed at the bottom of the sliding adjustment assembly. The inner side of the connecting cylinder (22) is provided with an inner support plate (28). The inner support plate (28) is provided with a through hole at the center position. The inner wall of the through hole is provided with an integrally connected top baffle (30) and bottom baffle (29). The outer wall of the bottom baffle (29) is provided with a first side hole (31) distributed at equal intervals. The outer wall of the top baffle (30) is provided with a second side hole (32) distributed at equal intervals. The bottom end of the connecting cylinder (22) is connected to the top of the connecting cylinder (22) through the first side hole (31) and the second side hole (32). The connecting cylinder (22) is used in conjunction with the furnace body (2).

2. The combined smelting furnace according to claim 1, characterized in that, The inner support plate (28) is configured as a funnel-shaped structure, the top of the bottom cover (29) is configured as a frustum conical structure, and the top cover (30) is configured as a hollow frustum conical structure.

3. The combined smelting furnace according to claim 1, characterized in that, The sliding adjustment assembly includes a slide groove disposed on the inner side wall of the lifting frame (3), a slide seat (21) slidably connected to the inner wall of the slide groove, an mounting plate (26) at the bottom of the slide seat (21), a fixing hole disposed on the inner side of the slide groove, a groove surround plate disposed on the top of the mounting plate (26), the groove surround plate being adapted to the inner side of the fixing hole, screws (27) disposed at the four corners of the bottom outer wall of the mounting plate (26), the mounting plate (26) being fixed to the slide seat (21) by the screws (27), a fourth hydraulic rod (20) disposed on one side inner wall of the lifting frame (3), the piston end of the fourth hydraulic rod (20) being connected to one side outer wall of the slide seat (21).

4. A combined smelting furnace according to claim 3, characterized in that, The bottom of the preheating box (4) is provided with a connecting pipe head (23), the inner side of the connecting pipe head (23) is provided with a built-in channel (24), and the inner side of the slot enclosure is provided with a filter plate (25).

5. A combined smelting furnace according to claim 4, characterized in that, The mounting plate (26) has a connecting hole on its inner side, and the connecting cylinder (22) is connected to the upper part of the slide (21) through the connecting hole.

6. A combined smelting furnace according to claim 1, characterized in that, The hanging assembly includes a winding frame disposed on one side of the support leg (1), a winding roller (13) is connected to the inner side wall of the winding frame by a bearing, a motor (14) is disposed on one side of the winding frame, one end of the output shaft of the motor (14) is connected to the winding roller (13), and a steel wire rope (15) is wound inside the winding roller (13).

7. A combined smelting furnace according to claim 6, characterized in that, The furnace body (2) is provided with a lifting lug (18) on one side. The free end of the steel wire rope (15) is attached to the outer wall of the lifting lug (18). The furnace body (2) is provided with a rotating shaft (10) on both sides. One side of each of the two rotating shafts (10) is connected to the inner side of the support leg (1) through a bearing.

8. A combined smelting furnace according to claim 7, characterized in that, The furnace body (2) is composed of a shell (201), a heat insulation layer (202), and a crucible liner (203). The top of the crucible liner (203) is provided with an upwardly extending rim (204). The connecting cylinder (22) is adapted to the inner wall of the rim (204). A burner (16) is provided below the crucible liner (203). An interface (17) is provided on one outer wall of the shell (201), and the interface (17) is connected to the burner (16).

9. A combined smelting furnace according to claim 1, characterized in that, Each of the support legs (1) has a connecting platform on its outer wall. Each of the two connecting platforms has a support group. Each support group consists of two limiting rods (12) and a third hydraulic rod (11). The top of the third hydraulic rod (11) is connected to the bottom of the lifting frame (3). Both sides of the bottom outer wall of the lifting frame (3) have limiting holes. The limiting rods (12) are movably connected to the inner wall of the limiting holes.

10. A combined smelting furnace according to claim 4, characterized in that, The lifting frame (3) has top frames (7) on both sides, and a connecting rod (8) between the two top frames (7). Two movable seats are sleeved on the outer wall of the connecting rod (8), and a second hydraulic rod (9) is provided on each of the two movable seats. The top of the preheating box (4) is provided with a cover plate (34), and the top of the cover plate (34) is provided with two fixed seats. The top of the two fixed seats is provided with movable heads. The piston ends of the two second hydraulic rods (9) are respectively connected to the two movable heads. The lifting frame (3) is also connected to the two sides with horizontally arranged first hydraulic rods (5). A hydraulic rod (5) has a piston end connected to the same connecting frame (6). A support rod (19) is provided on one side of the connecting frame (6). A push plate (33) is connected to one end of the support rod (19) that passes through the preheating box (4). The push plate (33) is adapted to the inner side of the preheating box (4). A guide cover (35) is provided on one side of the inner wall of the preheating box (4). The built-in channel (24) communicates with the guide cover (35). The guide cover (35) is used to guide hot flue gas into the preheating box (4). A gas inlet (36) is provided on one side of the top outer wall of the preheating box (4).

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