Refining furnace scrap steel preheating feeding device with energy recovery function

Abstract

The invention belongs to the technical field of scrap steel refining preheating equipment, and particularly relates to a refining furnace scrap steel preheating feeding device with an energy recovery function, which comprises a preheating furnace body, a mounting plate is mounted above the preheating furnace body, a zigzag baffle capable of transversely moving is arranged above the mounting plate, and the zigzag baffle is used for storing materials. A driving part is mounted above the mounting plate, the driving part is used for driving the concentric-square-shaped baffle to move, a reset part is mounted above the mounting plate, and a movable plugging plate is mounted on one side of the reset part; preheated hot air in the preheating furnace body is extracted into the concentric-square-shaped baffle through the air extraction part, waste steel materials in the concentric-square-shaped baffle are preliminarily heated, energy recovery is achieved, heat waste is avoided, the energy utilization rate of the whole refining furnace system is effectively increased, energy consumption in the production process is reduced, and the energy utilization rate of the whole refining furnace system is increased. And the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of scrap steel refining preheating equipment, and in particular to a scrap steel preheating feeding device for a refining furnace with energy recovery function. Background Technology

[0002] In the steel smelting industry, the refining furnace is one of the key pieces of equipment, used to further purify and refine molten iron to produce high-quality steel. Scrap steel, as a crucial raw material for the refining furnace, has a significant impact on its production efficiency, energy consumption, and steel quality due to its addition method and preheating treatment. The traditional method of adding scrap steel to the refining furnace typically involves directly adding it, which has several drawbacks. Because scrap steel is at a low temperature, it absorbs a large amount of heat upon addition, causing a sharp drop in furnace temperature. This not only increases energy consumption but also affects the smelting rhythm and efficiency. To compensate for the temperature drop, a large amount of additional fuel is needed to reheat the materials in the furnace, further exacerbating energy waste and increasing production costs.

[0003] Most existing scrap steel feeding devices do not consider preheating the scrap steel, or the preheating methods are ineffective. During the direct addition of scrap steel to the refining furnace, a significant amount of heat is absorbed by the scrap steel for heating, heat that could otherwise be used in other production processes or to maintain stable furnace temperatures. For example, in large steel enterprises, refining furnaces process large quantities of scrap steel daily. Due to the lack of effective energy recovery mechanisms, the daily heat loss from scrap steel addition is considerable, leading to substantial energy waste and high production costs.

[0004] Meanwhile, although some existing preheating devices can preheat scrap steel to a certain extent, the hot air generated during the preheating process is often not fully utilized and is directly discharged into the environment, further reducing energy efficiency. For example, in some preheating furnaces, the hot air generated inside the furnace carries a large amount of heat, but due to the lack of a reasonable recovery and utilization system, this hot air is wasted, and effective energy recovery is not achieved.

[0005] Some existing scrap preheating devices have structural design flaws, resulting in uneven heating of the scrap during the preheating process. For example, some preheating furnaces use simple heating methods, leading to uneven heat distribution and significant temperature differences in different parts of the scrap. When this unevenly preheated scrap is added to the refining furnace, it affects the temperature uniformity of the materials inside the furnace, thereby impacting the smelting reaction and the quality of the steel.

[0006] In steel production, temperature uniformity is one of the key factors in ensuring the consistency of steel performance. Uneven preheating of scrap steel can lead to excessively high or low temperatures in certain areas of the refining furnace, resulting in uneven distribution of chemical components in the steel, causing defects such as segregation, and reducing the mechanical properties and quality stability of the steel. This not only affects the performance of the steel in use but also increases the difficulty and cost of subsequent processing. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a refining furnace scrap preheating and feeding device with energy recovery function, which more accurately solves the problems mentioned in the background art.

[0008] This invention is achieved through the following technical solution: This invention proposes a preheating and feeding device for scrap steel in a refining furnace with energy recovery function. The device includes a preheating furnace body, an mounting plate mounted above the furnace body, and a laterally movable U-shaped baffle mounted above the mounting plate for storing material. A driving unit is mounted above the mounting plate to move the U-shaped baffle. A reset unit is mounted above the mounting plate, and a movable sealing plate is mounted on one side of the reset unit. The sealing plate blocks the area above the U-shaped baffle after material has been loaded at the baffle. A material leakage trough is provided above the hot furnace body. A second material leakage trough is provided at the location of the mounting plate at the location of the first material leakage trough. When the U-shaped baffle moves to the location of the second material leakage trough, the material falls into the preheating furnace body. An exhaust unit is symmetrically installed on the surface of the preheating furnace body relative to the location of the mounting plate. The exhaust unit is used to extract the preheated hot air in the preheating furnace body into the U-shaped baffle for preliminary heating of the material. A shielding plate is installed on one side of the U-shaped baffle located at the reset part. The shielding plate is used to block the area above the second material leakage trough when the U-shaped baffle has not moved to the location of the second material leakage trough.

[0009] Preferably, the reset part includes a raised plate installed above the mounting plate. A sliding rod is installed on one side of the raised plate, and a slider is slidably connected to the surface of the sliding rod. The bottom of the slider is connected to the top of the sealing plate. A stop plate is installed at the bottom of the sealing plate. The stop plate is used to contact the side of the U-shaped baffle when the U-shaped baffle moves to the bottom of the sealing plate. When the U-shaped baffle moves to the second location of the leakage trough, it drives the sealing plate to move together. At this time, the sealing plate is located above the U-shaped baffle and is used to block the top of the U-shaped baffle to prevent the heat from escaping from the U-shaped baffle.

[0010] Preferably, a return spring is installed between the lifting plate and the slider. The return spring is sleeved on the surface of the slide rod. A limit head is installed at the end of the slide rod. When the U-shaped baffle is reset to the initial state under the drive of the drive unit, it limits the sealing plate, so that the sealing plate is disengaged from above the U-shaped baffle for subsequent feeding and exhaust of gas after heating.

[0011] Preferably, the driving unit includes a connecting plate, a servo motor, a threaded rod, and a threaded seat. The connecting plate is mounted above the mounting plate, the servo motor is mounted on the side wall of the connecting plate, the output end of the servo motor is connected to the threaded rod, the threaded rod is rotatably connected to the connecting plate via a bearing, the threaded seat is mounted on the outer peripheral wall of the threaded rod and threadedly connected to it, one end of the threaded seat is connected to one end of a U-shaped baffle for driving the U-shaped baffle to move laterally, and a guide rod is also mounted on the side wall of the connecting plate, the guide rod passing through the threaded seat.

[0012] Preferably, the extraction section includes an extraction pump, a filter section, and a conveying hose. The extraction pump is installed on the outer wall of the preheating furnace body. An extraction pipe is installed at the air inlet of the extraction pump and is inserted into the preheating furnace body. A guide pipe is installed at the air outlet of the extraction pump. The filter section is installed between the guide pipe and the conveying hose and is connected to both the guide pipe and the conveying hose to filter the extracted hot air. The conveying hose extends to one side of the U-shaped baffle. A diverter pipe is installed at the end of the conveying hose. Multiple air outlet nozzles are provided through the outer wall of the U-shaped baffle. The diverter pipe is connected to the air outlet nozzles to send the gas in the preheating furnace body into the U-shaped baffle to heat the material.

[0013] Preferably, the filtration section includes a cylinder, a cover, and a filter element. The cylinder is fixed to the air guide pipe. The cover is located on one side of the cylinder and is movable. The filter element is located inside the cylinder and is used to filter the extracted hot air. A sealing ring is installed on the inner wall of the cover. The sealing ring is inserted into the cylinder and contacts the filter element to seal the cylinder and the cover.

[0014] Preferably, the air extraction unit further includes a fixing plate, a pipe connector is installed at the end of the delivery hose, the fixing plate is used to support the pipe connector, a telescopic rod is installed at the end of the pipe connector, the telescopic rod is connected to the cylinder cover, and a limit spring is installed between the cylinder cover and the fixing plate for elastic support of the cylinder cover.

[0015] Preferably, the U-shaped baffle is provided with a stirring part, which is used to agitate the material. The stirring part includes a stirring rod and stirring blades. The stirring rod is rotatably connected to the inner wall of the U-shaped baffle through a bearing. The stirring blades are installed on the outer peripheral wall of the stirring rod and are arranged in multiples.

[0016] Preferably, the stirring part further includes a rotating rod installed at the end of the stirring rod and extending outside the U-shaped baffle. A toothed disc is installed on the surface of the rotating rod, and a rack is installed above the mounting plate. The toothed disc and the rack are meshed together to drive the stirring rod to rotate when the U-shaped baffle moves laterally.

[0017] Compared with the prior art, the present invention provides a refining furnace scrap preheating and feeding device with energy recovery function, which has the following beneficial effects: This refining furnace scrap preheating and feeding device with energy recovery function draws preheated hot air from the preheating furnace into the U-shaped baffle through the air extraction section, and preheats the scrap steel material in the U-shaped baffle. This realizes energy recovery, avoids heat waste, effectively improves the energy utilization rate of the entire refining furnace system, reduces energy consumption in the production process, and reduces production costs.

[0018] This refining furnace scrap steel preheating and feeding device with energy recovery function has a stirring part set in the U-shaped baffle. When the U-shaped baffle moves, the meshing of the toothed disc and the rack drives the stirring rod to rotate, so that the stirring blades tumble the material, allowing the material to fully contact the hot air and be heated more evenly. This further improves the preheating effect of the material, makes fuller use of the hot air energy in the preheating furnace, and enhances the energy recovery function.

[0019] This refining furnace scrap preheating and feeding device with energy recovery function organically combines scrap preheating, feeding, and energy recovery functions. While achieving scrap preheating and feeding, it utilizes the hot air inside the preheating furnace to preheat the material. The reasonable structural design of each component, such as the reset part that allows the sealing plate to move with the U-shaped baffle to achieve sealing and ensure no hot air leakage, and the drive part that enables precise movement of the U-shaped baffle, ensures the stable and efficient operation of the energy recovery function and improves the overall performance and use value of the entire device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a refining furnace scrap preheating and feeding device with energy recovery function proposed in this invention; Figure 2 This is a side view of the structure of a refining furnace scrap preheating and feeding device with energy recovery function proposed in this invention; Figure 3 This is a structural cross-sectional view of a refining furnace scrap preheating and feeding device with energy recovery function proposed in this invention; Figure 4 This is a top view of the structure of a refining furnace scrap preheating and feeding device with energy recovery function proposed in this invention; Figure 5 This is a schematic diagram of the stirring section of a refining furnace scrap steel preheating and feeding device with energy recovery function proposed in this invention; Figure 6 This is a schematic diagram of the reset section of a refining furnace scrap preheating and feeding device with energy recovery function proposed in this invention; Figure 7This invention proposes a preheating and feeding device for scrap steel in a refining furnace with energy recovery function. Figure 4 Enlarged view of region A in the middle; Figure 8 This is a schematic diagram of the filter section of a refining furnace scrap steel preheating and feeding device with energy recovery function proposed in this invention.

[0021] In the diagram: 1. Preheating furnace body; 11. Material leakage chute one; 2. Mounting plate; 21. Material leakage chute two; 3. U-shaped baffle; 4. Drive unit; 41. Connecting plate; 42. Servo motor; 43. Threaded rod; 44. Threaded seat; 45. Guide rod; 5. Sealing plate; 51. Support plate; 6. Reset unit; 61. Elevating plate; 62. Slide rod; 63. Slider; 64. Reset spring; 65. Limit head; 7. Air extraction unit; 71. Air extraction pump; 72. 73. Suction pipe; 74. Air guide pipe; 75. Filter section; 76. Cylinder body; 77. Cylinder cover; 78. Sealing ring; 79. Filter element; 70. Delivery hose; 71. Pipe connector; 72. Telescopic rod; 73. Diverter pipe; 74. Air outlet nozzle; 75. Fixing plate; 76. Limiting spring; 77. Stirring section; 88. Stirring rod; 89. Stirring blade; 80. Rotating rod; 81. Gear plate; 82. Gear rack; 9. Baffle plate. Detailed Implementation

[0022] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings. Example

[0023] like Figures 1-8As shown in the figure, an embodiment of the present invention discloses a refining furnace scrap preheating and feeding device with energy recovery function, comprising a preheating furnace body 1, and an mounting plate 2 fixedly installed above the preheating furnace body 1. A laterally movable U-shaped baffle 3 is provided above the mounting plate 2, which is used to store materials. A driving unit 4 is installed above the mounting plate 2, which drives the U-shaped baffle 3 to move laterally. A reset unit 6 is also installed above the mounting plate 2, and a movable sealing plate 5 is installed on one side of the reset unit 6. The sealing plate 5 is used to block the area above the U-shaped baffle 3 after material has been loaded at the U-shaped baffle 3. A material leakage trough 11 is provided above the preheating furnace body 1, and a corresponding material leakage trough 21 is provided on the mounting plate 2 at the location of the material leakage trough 11. When the U-shaped baffle 3 moves to the location of the material leakage trough 21, the material falls into the preheating furnace body 1 through the material leakage trough 11 and the material leakage trough 21. A suction unit 7 is symmetrically installed on the surface of the preheating furnace body 1 relative to the mounting plate 2. The suction unit 7 draws the preheated hot air from the preheating furnace body 1 into the U-shaped baffle 3 to preheat the material inside the U-shaped baffle 3. A shielding plate 9 is installed on one side of the U-shaped baffle 3 located on the reset part 6. When the U-shaped baffle 3 has not moved to the discharge trough 21, the shielding plate 9 blocks the area above the discharge trough 21 to prevent the material from falling prematurely. Through the setting of this device, the functions of preheating and feeding scrap steel are realized. At the same time, the hot air in the preheating furnace body 1 is used to preheat the material, realizing energy recovery.

[0024] In this invention, the reset unit 6 includes a raised plate 61 mounted above the mounting plate 2. A sliding rod 62 is fixedly mounted on one side of the raised plate 61, and a slider 63 is slidably connected to the surface of the sliding rod 62. The bottom of the slider 63 is fixedly connected to the top of the sealing plate 5. A stop plate 51 is mounted on the bottom of the sealing plate 5. When the U-shaped baffle 3 moves to the bottom of the sealing plate 5, the stop plate 51 contacts the side of the U-shaped baffle 3. When the U-shaped baffle 3 moves towards the leakage trough 21, it drives the sealing plate 5 to move together, thereby achieving a seal on the U-shaped baffle 3 and preventing hot air leakage. Through the structural design of the reset unit 6, the sealing plate 5 can move with the U-shaped baffle 3 and achieve the sealing function, ensuring the normal operation of the device.

[0025] In this invention, a return spring 64 is installed between the support plate 61 and the slider 63. The return spring 64 is sleeved on the surface of the slide rod 62, and a limiting head 65 is installed at the end of the slide rod 62. When the U-shaped baffle 3 is reset to its initial state under the drive of the drive unit 4, the limiting head 65 limits the sealing plate 5, causing the sealing plate 5 to disengage from above the U-shaped baffle 3. At this time, subsequent feeding operations can be carried out, and the heated gas can also be discharged smoothly. The setting of the return spring 64 and the limiting head 65 enables the sealing plate 5 to automatically reset, facilitating subsequent operations and gas discharge.

[0026] In this invention, the drive unit 4 includes a connecting plate 41, a servo motor 42, a threaded rod 43, and a threaded seat 44. The connecting plate 41 is fixedly installed above the mounting plate 2. The servo motor 42 is installed on one side of the connecting plate 41, and its output end is connected to the threaded rod 43. The threaded rod 43 is rotatably connected to the connecting plate 41 via a bearing. The threaded seat 44 is installed on the outer peripheral wall of the threaded rod 43 and threadedly connected to it. One end of the threaded seat 44 is fixedly connected to the back of the U-shaped baffle 3. When the servo motor 42 is started, the threaded rod 43 rotates, thereby causing the threaded seat 44 to move laterally, which in turn causes the U-shaped baffle 3 to move laterally. A guide rod 45 is also installed on the side wall of the connecting plate 41. The guide rod 45 passes through the threaded seat 44 and guides the movement of the threaded seat 44, ensuring the stability of the movement of the U-shaped baffle 3. Through the structural design of the drive unit 4, precise lateral movement of the U-shaped baffle 3 is achieved, meeting the usage requirements of the device.

[0027] In this invention, the air extraction unit 7 includes an air extraction pump 71, a filter unit 74, and a delivery hose 75. The air extraction pump 71 is installed on the surface of the preheating furnace body 1. An air extraction pipe 72 is installed at the air inlet of the air extraction pump 71 and is inserted into the preheating furnace body 1 to extract hot air from the preheating furnace body 1. An air guide pipe 73 is installed at the air outlet of the air extraction pump 71. The filter unit 74 is installed between the air guide pipe 73 and the delivery hose 75 and is connected to both the air guide pipe 73 and the delivery hose 75 to filter the extracted gas and remove impurities. The conveying hose 75 extends to one side of the U-shaped baffle 3. A diverter pipe 76 is installed at the end of the conveying hose 75. Multiple air outlet nozzles 77 are installed through the outer wall of the U-shaped baffle 3. The diverter pipe 76 is connected to the air outlet nozzles 77 to send the filtered gas in the preheating furnace 1 into the U-shaped baffle 3 to heat the material. Through the setting of the air extraction unit 7, the hot air in the preheating furnace 1 is extracted, filtered and conveyed, and the material in the U-shaped baffle 3 is effectively heated, thereby improving the energy utilization rate.

[0028] In this invention, the filter section 74 includes a cylindrical body 741, a cover 742, and a filter element 744. The cylindrical body 741 is fixedly connected to the air guide pipe 73. The cover 742 is located on one side of the cylindrical body 741 and is movable. The filter element 744 is disposed inside the cylindrical body 741 for filtering the passing gas. A sealing ring 743 is installed on the inner wall of the cover 742. The sealing ring 743 is inserted into the cylindrical body 741 and contacts the filter element 744, thereby sealing the cylindrical body 741 and the cover 742 to prevent gas leakage and ensure filtration effect. The structure of the filter section 74 can effectively filter impurities in the gas and improve gas quality. At the same time, the sealing ring 743 ensures the airtightness during the filtration process.

[0029] In this invention, the extraction unit 7 further includes a fixing plate 78, and a pipe connector 751 is installed at the end of the delivery hose 75. The fixing plate 78 supports the pipe connector 751. A telescopic rod 752 is installed at the end of the pipe connector 751, and the telescopic rod 752 is connected to the cylinder cover 742. A limit spring 781 is installed between the cylinder cover 742 and the fixing plate 78, and the limit spring 781 provides elastic support for the cylinder cover 742. When the filter element 744 needs to be replaced, the cylinder cover 742 is pulled to overcome the elastic force of the limit spring 781, so that the cylinder cover 742 is separated from the cylinder body 741, making it convenient to remove and replace the filter element 744. This structural design makes the replacement of the filter element 744 more convenient and quick, improving the maintenance efficiency of the device.

[0030] In this invention, a stirring section 8 is provided inside the U-shaped baffle 3. The stirring section 8 is used to agitate the material, making the material heat more evenly. The stirring section 8 includes a stirring rod 81 and stirring blades 82. The stirring rod 81 is rotatably connected to the inner wall of the U-shaped baffle 3 via bearings. Multiple stirring blades 82 are installed on the outer peripheral wall of the stirring rod 81. The rotation of the stirring rod 81 drives the stirring blades 82 to stir the material. The arrangement of the stirring section 8 allows the material inside the U-shaped baffle 3 to fully contact the hot air, improving the preheating effect of the material.

[0031] In this invention, the stirring unit 8 further includes a rotating rod 83 installed at the end of the stirring rod 81 and extending outside the U-shaped baffle 3. A toothed disc 84 is mounted on the surface of the rotating rod 83, and a rack 85 is mounted above the mounting plate 2. The toothed disc 84 and the rack 85 are meshed together. When the U-shaped baffle 3 moves laterally, the toothed disc 84 rolls on the rack 85, thereby driving the rotating rod 83 and the stirring rod 81 to rotate, thus achieving stirring of the material. With this structural design, the movement of the U-shaped baffle 3 drives the stirring rod 81 to rotate, eliminating the need for an additional power source, simplifying the device structure, and reducing costs.

[0032] The workflow of this invention is as follows: In the initial state, the U-shaped baffle 3 is in the position of the non-leaking trough 21, and the shielding plate 9 blocks the area above the leakage trough 21 to prevent material from falling prematurely. At this time, material can be added into the U-shaped baffle 3. The vacuum pump 71 is started, and hot air is drawn from the preheating furnace body 1 through the vacuum pipe 72. The hot air enters the filter section 74 through the air guide pipe 73. In the filter section 74, the gas is filtered through the filter element 744 to remove impurities. The sealing ring 743 on the inner wall of the cylinder cover 742 ensures the sealing of the filtration process and prevents gas leakage. The filtered gas is sent to the U-shaped baffle 3 through the conveying hose 75, the diverter pipe 76, and the air outlet nozzle 77 to preliminarily heat the material in the U-shaped baffle 3, thereby realizing energy recovery.

[0033] The servo motor 42 is started, driving the threaded rod 43 to rotate. The threaded seat 44 moves laterally on the threaded rod 43. Since the threaded seat 44 is fixedly connected to the back of the U-shaped baffle 3, it drives the U-shaped baffle 3 to move laterally. The guide rod 45 on one side of the connecting plate 41 passes through the threaded seat 44, guiding the movement of the threaded seat 44 and ensuring the stability of the movement of the U-shaped baffle 3. When the U-shaped baffle 3 moves towards the discharge trough 21, the side of the U-shaped baffle 3 contacts the abutment plate 51, driving the sealing plate 5 to move together. The slider 63 above the sealing plate 5 slides on the sliding rod 62, achieving a seal on the U-shaped baffle 3 and preventing hot air leakage. When the U-shaped baffle 3 moves laterally, the toothed disc 84 at the end of the stirring rod 81 rolls on the rack 85 above the mounting plate 2, driving the rotating rod 83 and the stirring rod 81 to rotate. The multiple stirring blades 82 on the surface of the stirring rod 81 agitate the material inside the U-shaped baffle 3, making the material heat more evenly. When the U-shaped baffle 3 moves to the material discharge trough 21, the material falls into the preheating furnace body 1 through the material discharge trough 11 and the material discharge trough 21. Driven by the drive unit 4, the U-shaped baffle 3 returns to its initial state. The return spring 64 between the support plate 61 and the slider 63 functions, and simultaneously, the limiting head 65 at the end of the slide rod 62 limits the sealing plate 5, causing it to detach from above the U-shaped baffle 3. This allows for subsequent material feeding, and the heated gas can also be discharged smoothly. When the filter element 744 needs to be replaced, the cylinder cover 742 is pulled to overcome the elasticity of the limiting spring 781, separating the cylinder cover 742 from the cylinder body 741 for easy removal and replacement of the filter element 744. After replacement, the cylinder cover 742 is released, the limiting spring 781 returns the cylinder cover 742 to its original position, and the sealing ring 743 is reinserted into the cylinder body 741 to achieve a seal. In practice, the air nozzle 77 directly sprays hot air into the stirring area.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A refining furnace scrap preheating and feeding device with energy recovery function, comprising a preheating furnace body (1), characterized in that, An installation plate (2) is installed above the preheating furnace body (1). A horizontally movable U-shaped baffle (3) is provided above the installation plate (2). The U-shaped baffle (3) is used to store materials. A drive unit (4) is installed above the installation plate (2). The drive unit (4) is used to drive the U-shaped baffle (3) to move. A reset unit (6) is installed above the installation plate (2). A movable sealing plate (5) is installed on one side of the reset unit (6). The sealing plate (5) is used to block the U-shaped baffle (3) after the materials are loaded at the U-shaped baffle (3). A material leakage trough (11) is opened above the preheating furnace body (1). The installation plate (2) A second material trough (21) is provided at the first material trough (11) to allow the material to fall into the preheating furnace body (1) when the circular baffle (3) moves to the second material trough (21). An exhaust part (7) is symmetrically installed on the surface of the preheating furnace body (1) relative to the position of the mounting plate (2). The exhaust part (7) is used to extract the preheated hot air in the preheating furnace body (1) into the circular baffle (3) for preliminary heating of the material. A shielding plate (9) is installed on one side of the reset part (6) of the circular baffle (3). The shielding plate (9) is used to block the area above the second material trough (21) when the circular baffle (3) has not moved to the second material trough (21).

2. The refining furnace scrap preheating and feeding device with energy recovery function according to claim 1, characterized in that, The reset part (6) includes a raised plate (61) installed above the mounting plate (2). A sliding rod (62) is installed on one side of the raised plate (61). A slider (63) is slidably connected to the surface of the sliding rod (62). The bottom of the slider (63) is connected to the top of the sealing plate (5). A stop plate (51) is installed at the bottom of the sealing plate (5). The stop plate (51) is used to contact the side of the circular baffle (3) when the circular baffle (3) moves to the bottom of the sealing plate (5). When the circular baffle (3) moves to the second leakage trough (21), it drives the sealing plate (5) to move together. At this time, the sealing plate (5) is located above the circular baffle (3) and is used to block the top of the circular baffle (3) to prevent the heat from escaping from the circular baffle (3).

3. The refining furnace scrap preheating and feeding device with energy recovery function according to claim 2, characterized in that, A return spring (64) is installed between the raised plate (61) and the slider (63). The return spring (64) is sleeved on the surface of the slide rod (62). A limit head (65) is installed at the end of the slide rod (62). When the baffle (3) is reset to the initial state under the drive of the drive unit (4), it limits the sealing plate (5) so that the sealing plate (5) is disengaged from the baffle (3) for subsequent feeding and gas discharge after heating.

4. The refining furnace scrap preheating and feeding device with energy recovery function according to claim 1, characterized in that, The drive unit (4) includes a connecting plate (41), a servo motor (42), a threaded rod (43), and a threaded seat (44). The connecting plate (41) is mounted above the mounting plate (2). The servo motor (42) is mounted on the side wall of the connecting plate (41). The output end of the servo motor (42) is connected to the threaded rod (43). The threaded rod (43) is rotatably connected to the connecting plate (41) via a bearing. The threaded seat (44) is mounted on the outer peripheral wall of the threaded rod (43) and threadedly connected to it. One end of the threaded seat (44) is connected to one end of the U-shaped baffle (3) to drive the U-shaped baffle (3) to move laterally. A guide rod (45) is also installed on the side wall of the connecting plate (41). The guide rod (45) passes through the threaded seat (44).

5. A refining furnace scrap preheating and feeding device with energy recovery function according to claim 1, characterized in that, The extraction section (7) includes an extraction pump (71), a filter section (74), and a delivery hose (75). The extraction pump (71) is installed on the outer wall of the preheating furnace body (1). An extraction pipe (72) is installed at the air inlet of the extraction pump (71), and the extraction pipe (72) is inserted into the preheating furnace body (1). A guide pipe (73) is installed at the air outlet of the extraction pump (71). The filter section (74) is installed between the guide pipe (73) and the delivery hose (75) and... It is connected to the gas guide pipe (73) and the conveying hose (75) for filtering the extracted hot gas. The conveying hose (75) extends to one side of the U-shaped baffle (3). A diverter pipe (76) is installed at the end of the conveying hose (75). Multiple gas outlet nozzles (77) are provided through the outer wall of the U-shaped baffle (3). The diverter pipe (76) and the gas outlet nozzles (77) are connected to send the gas in the preheating furnace body (1) to the U-shaped baffle (3) to heat the material.

6. A refining furnace scrap preheating and feeding device with energy recovery function according to claim 5, characterized in that, The filter section (74) includes a cylinder (741), a cylinder cover (742), and a filter element (744). The cylinder (741) is fixed to the air guide pipe (73). The cylinder cover (742) is located on one side of the cylinder (741) and is movable. The filter element (744) is located inside the cylinder (741) and is used to filter the extracted hot air. A sealing ring (743) is installed on the inner wall of the cylinder cover (742). The sealing ring (743) is inserted into the cylinder (741) and contacts the filter element (744) to seal the cylinder (741) and the cylinder cover (742).

7. A refining furnace scrap preheating and feeding device with energy recovery function according to claim 6, characterized in that, The air extraction unit (7) also includes a fixing plate (78), and a pipe connector (751) is installed at the end of the delivery hose (75). The fixing plate (78) is used to support the pipe connector (751). A telescopic rod (752) is installed at the end of the pipe connector (751). The telescopic rod (752) is connected to the cylinder cover (742). A limit spring (781) is installed between the cylinder cover (742) and the fixing plate (78) for elastic support of the cylinder cover (742).

8. A refining furnace scrap preheating and feeding device with energy recovery function according to claim 1, characterized in that, The spiral baffle (3) is provided with a stirring part (8), which is used to agitate the material. The stirring part (8) includes a stirring rod (81) and stirring blades (82). The stirring rod (81) is rotatably connected to the inner wall of the spiral baffle (3) through a bearing. The stirring blades (82) are installed on the outer peripheral wall of the stirring rod (81) and are provided in multiples.

9. A refining furnace scrap preheating and feeding device with energy recovery function according to claim 8, characterized in that, The stirring part (8) also includes a rotating rod (83) installed at the end of the stirring rod (81) and extending to the outside of the U-shaped baffle (3). A toothed disc (84) is installed on the surface of the rotating rod (83), and a rack (85) is installed above the mounting plate (2). The toothed disc (84) and the rack (85) are meshed together to drive the stirring rod (81) to rotate when the U-shaped baffle (3) moves laterally.

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