Desulfurization refining furnace for pure iron smelting

Abstract

The invention relates to the technical field of refining furnaces, and provides a desulfurization refining furnace for pure iron smelting, which comprises a refining furnace body, furnace body overturning equipment is arranged on the refining furnace body, the desulfurization refining furnace further comprises a through rotating shaft and a communication mounting assembly, the bottom of the refining furnace body is rotatably connected with the through rotating shaft in a penetrating manner, and a rotating cylinder is arranged at the top of the through rotating shaft; a rotating driving structure is arranged between the through rotating shaft and the bottom of the refining furnace body and used for driving the through rotating shaft and the rotating cylinder to rotate, the through rotating shaft is hollow, a plurality of communicating mounting assemblies are arranged on the circumference of the top of the rotating cylinder, and the tops of the communicating mounting assemblies communicate with a bent gas injection structure capable of injecting gas into the middle of the refining furnace body; and the outer side of the bent gas injection structure is fixedly sleeved with a stirring plate body. By means of the technical scheme, the technical problem that in the prior art, in the pure iron smelting and desulfurizing process of a refining furnace, it is difficult to rapidly and fully mix molten metal and the injected solid desulfurizing agent is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of refining furnace technology, specifically to a desulfurization refining furnace for pure iron smelting. Background Technology

[0002] A refining furnace is a refining device used in the steel production process to remove sulfides from molten steel. Specifically, it operates by heating and smelting pure iron raw materials charged into the furnace using electrodes, causing the pure iron to gradually melt and form a molten metal. Because pure iron raw materials contain a large number of impurity metal elements, mainly including silicon, manganese, phosphorus, and sulfur, sulfur is one of the most common and harmful impurity elements in pure iron. It is a major cause of reduced steel strength, such as hot brittleness, after refining. Therefore, a refining furnace is needed to effectively remove sulfur from the pure iron.

[0003] In existing technologies, the main method for removing sulfides from molten iron during the smelting process in refining furnaces is to add a solid desulfurizing agent to the molten iron, while simultaneously using argon bottom blowing technology. As argon is blown upwards from the bottom of the refining furnace, a large number of bubbles are formed inside the furnace, which allows the solid desulfurizing agent to mix thoroughly with the molten iron. This causes the sulfides in the molten iron to form slag that floats on the surface of the molten iron, and then the slag is discharged, thus completing the removal of sulfides from the molten iron.

[0004] In existing technologies, the mixing of solid desulfurizing agent with molten metal in refining furnaces generally only uses argon bottom blowing. However, during the rapid turbulence of argon, the reaction of molten metal is carried out from bottom to top. When the molten metal level in the refining furnace is high, it is difficult to achieve rapid and thorough mixing of the solid desulfurizing agent at the top of the molten metal with the molten metal under the assistance of argon. Summary of the Invention

[0005] To overcome the above-mentioned defects, embodiments of the present invention provide a desulfurization refining furnace for pure iron smelting, which solves the technical problem in the prior art that it is difficult to quickly and fully mix the molten metal and the added solid desulfurizing agent in the desulfurization process of pure iron smelting in the refining furnace.

[0006] The present invention provides a desulfurization refining furnace for pure iron smelting, comprising a refining furnace body, wherein the refining furnace body is provided with a furnace body tilting device, and further comprising: A through-rotating shaft is rotatably connected to the bottom of the refining furnace body. A rotating cylinder is provided at the top of the through-rotating shaft. A rotation drive structure is provided between the through-rotating shaft and the bottom of the refining furnace body to drive the through-rotating shaft and the rotating cylinder to rotate. The through-rotating shaft is hollow. The rotating cylinder has multiple connecting installation components on its top circumference. The top of each connecting installation component is connected to a curved gas injection structure that can inject gas into the middle of the refining furnace. A stirring plate is fixedly sleeved on the outside of the curved gas injection structure. The stirring plate rotates with the rotating cylinder to stir the molten metal in the refining furnace. The bottom of the curved gas injection structure is connected to the gas supply pipeline, and multiple gas supply pipelines pass through the through-rotating shaft and move out from the bottom of the refining furnace body. An argon bottom blowing assembly is provided between the gas supply pipeline and the top of the rotating cylinder.

[0007] To drive the through-shaft, rotating cylinder, bending air injection structure, and stirring plate to rotate, the rotation drive structure further includes a bucket-shaped connecting ring and a transmission rack. The bucket-shaped connecting ring is fixedly sleeved at the bottom of the through-shaft, and a transmission rack is fixedly sleeved at the bottom of the bucket-shaped connecting ring. The transmission racks are meshed on both sides of the transmission racks, and the two transmission racks are parallel to each other. A sliding mounting assembly is provided at the bottom of the transmission racks.

[0008] In order to drive the bucket-shaped connecting ring to rotate, the sliding mounting assembly includes a sliding support and a first hydraulic cylinder. The top of the sliding support is provided with a sliding protrusion, and the bottom end of the transmission rack is provided with a transverse sliding groove. The sliding protrusion is slidably connected to the transverse sliding groove. The top side of the sliding support is provided with a first hydraulic cylinder, and the output end of the first hydraulic cylinder is connected to the transmission rack.

[0009] To further facilitate the argon bottom blowing operation, the top of the rotating cylinder is designed with a permeable layer.

[0010] To ensure the delivery of argon gas, the connecting installation assembly further includes a hollow cylinder base, through which the permeable layer is connected, and the stirring plate is fixedly connected to the top of the hollow cylinder base.

[0011] To further circulate air into the molten metal in the middle of the refining furnace, the curved air injection structure includes a curved fixed pipe, an air blowing pipe, and a counterweight rod. The curved fixed pipe is connected to the top of the hollow cylinder base. The stirring plate is fixedly connected to the outer wall of the curved fixed pipe. Multiple air blowing holes are opened along the curve at the top of the curved fixed pipe. The air blowing pipe is slidably disposed within the curved fixed pipe. One side of the air blowing pipe is connected to the gas supply pipe. A closed sleeve is fitted onto the air blowing pipe. Multiple air outlet slots are opened on the closed sleeve. Air outlet holes are opened in the area corresponding to the air outlet slots on the air blowing pipe. The counterweight rod is fixedly connected to the other side of the air blowing pipe. The counterweight rod is vertically slidably disposed within the curved fixed pipe.

[0012] To further facilitate bottom-blowing of argon into the molten metal, the argon bottom-blowing assembly includes a permeable cylinder, a partition ring frame, and an exhaust valve pipe. The permeable cylinder is fixedly connected to the rotating cylinder. The top end of the through-rotating shaft is connected to the middle of the bottom end of the permeable cylinder. Argon can be discharged through the side wall of the permeable cylinder and the permeable layer. The partition ring frame is fixedly connected to the permeable cylinder. Multiple guide cylinders are connected to the inner arc surface of the partition ring frame. Each guide cylinder corresponds to a gas supply pipe. The gas supply pipe is slidably disposed within the guide cylinder. The exhaust valve pipe is connected to the area between the outer arc surface of the partition ring frame and the gas supply pipe within the permeable cylinder.

[0013] In order to inject gas into the gas supply line and adjust the position of the gas blowing line within the curved fixed line, the bottom end of the refining furnace body is further fixedly connected to a lifting slide cylinder via a connecting frame. The lifting slide cylinder is located at the bottom end of the through rotating shaft. A gas filling cylinder body is longitudinally slidably connected inside the lifting slide cylinder. The bottom end of the gas filling cylinder body is connected to a gas filling line, and multiple gas supply lines are connected to the gas filling cylinder body.

[0014] To enable the gas supply pipeline to supply gas during rotation, a branch pipe disc is fixedly connected to the inner top of the through-shaft. The branch pipe disc has multiple outlets, and the gas supply pipeline passes through the corresponding outlets. A rotating sealing plate is rotatably connected to the top of the gas cylinder, and the bottom end of the gas supply pipeline passes through the rotating sealing plate. A connecting rod is fixedly connected between the rotating sealing plate and the branch pipe disc.

[0015] To adjust the position of the gas cylinder, a second hydraulic cylinder is further provided at the bottom of the lifting slide. The output end of the second hydraulic cylinder is fixedly connected to the bottom end of the gas cylinder, which is used to drive the gas cylinder, the gas supply pipeline and the gas blowing pipeline to move.

[0016] The beneficial effects of the embodiments of the present invention are as follows: 1. In this invention, when it is necessary to remove internal sulfides from the molten metal in the refining furnace, after the pure iron is smelted into molten metal, a solid desulfurizing agent is added to the upper surface of the molten metal. Then, by driving the through-shaft to rotate, the rotating cylinder and multiple stirring plates rotate to stir the molten metal. During the stirring process, argon gas can be injected into the central region of the molten metal through the curved gas injection structure. The bubbles formed by the argon gas in the molten metal cooperate with the stirring plates to accelerate the mixing speed of the molten metal and the solid desulfurizing agent.

[0017] 2. In this invention, during the mixing process of molten metal and solid desulfurizer, argon gas is discharged from the gas supply pipeline into the permeable cylinder, and then discharged through the permeable layer at the top of the rotating cylinder. Argon gas bottom blowing technology is used to blow the interior of the refining furnace from bottom to top to ensure that the molten metal and solid desulfurizer are fully mixed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 This is a partial cross-sectional structural diagram showing the assembly of the refining furnace body, the permeable layer, the stirring plate, and the curved fixed pipeline in this invention. Figure 4 This is a partial cross-sectional structural diagram showing the cooperation of the rotating cylinder, stirring plate, bucket-shaped connecting ring, sliding support, and curved fixed pipeline in this invention. Figure 5 For the present invention Figure 3 A magnified structural diagram of point A in the middle; Figure 6 This is a partial cross-sectional structural diagram showing the interaction of the rotating cylinder, stirring plate, bucket-shaped connecting ring, sliding support, and curved fixed pipeline in this invention from another perspective. Figure 7 This is a schematic diagram of the structure of the gas supply pipeline, rotating cylinder, venting cylinder, partition ring frame, bending and fixing pipeline and branch plate in this invention. Figure 8 This is a partial cross-sectional structural diagram showing the cooperation of the gas supply pipeline, the isolation ring frame, the hollow cylinder seat, and the gas cylinder body in this invention; Figure 9This is a partial cross-sectional structural diagram showing the combination of the vertical sleeve, funnel-shaped cylinder, curved pipeline, and slag removal cylinder in this invention.

[0020] In the diagram: 1. Refining furnace body; 2. Furnace body tilting device; 3. Through-rotating shaft; 4. Rotating cylinder; 5. Stirring plate; 6. Gas supply pipeline; 7. Bucket-shaped connecting ring sleeve; 8. Transmission gear ring; 9. Transmission rack; 10. Sliding support; 11. Sliding protrusion; 12. First hydraulic cylinder; 13. Air permeable layer; 14. Hollow cylinder seat; 15. Bending and fixing pipeline; 16. Air blowing hole; 17. Air blowing pipeline; 18. Sealing sleeve; 19. Air outlet slot; 20. Air outlet; 21. Counterweight 21. Rod; 22. Ventilation cylinder; 23. Partition ring frame; 24. Guide cylinder; 25. Exhaust valve pipe; 26. Lifting slide; 27. Gas filling cylinder; 28. Gas filling pipeline; 29. ​​Branch pipe disc; 30. Rotating sealing plate; 31. Connecting rod; 32. Second hydraulic cylinder; 33. Vertical sleeve; 34. Funnel-shaped cylinder; 35. Rotating ring; 36. Motor drive equipment; 37. Transmission gear; 38. Bend pipeline; 39. Slag removal cylinder; 40. Slag outlet; 41. Hydraulic cylinder equipment. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Example 1, as Figures 1 to 9 As shown, this invention discloses a desulfurization refining furnace for pure iron smelting, including a refining furnace body 1 and a furnace body tilting device 2. The refining furnace body 1 is a prior art device known to those skilled in the art for smelting pure iron and removing impurity metals. In the actual pure iron smelting process, firstly, blocky pure iron raw materials are added into the refining furnace body 1, and then the electrodes are driven down, with the bottom of the electrodes inserted into the refining furnace body 1 to heat the pure iron, so that the pure iron gradually melts into molten metal. Then, the furnace body tilting device 2 drives the refining furnace body 1 and multiple components installed at the bottom to tilt together, and the molten metal after slag removal is discharged.

[0027] like Figures 1 to 8 As shown, in this embodiment, a through-rotating shaft 3 is also included. The bottom of the refining furnace body 1 is rotatably connected to the through-rotating shaft 3, and a rotating cylinder 4 is provided on the top of the through-rotating shaft 3. During the rotation of the through-rotating shaft 3, the rotating cylinder 4 is driven to rotate. During the rotation of the rotating cylinder 4, the curved gas injection structure and the stirring plate 5 can be driven to rotate, so as to realize the rapid mixing of the molten metal in the refining furnace body 1 with the added solid desulfurizing agent. The rotating cylinder 4 effectively shields the through-rotating shaft 3, so that the molten iron will not flow into the rotating area of ​​the through-rotating shaft 3 and the refining furnace body 1. A rotation drive structure is provided between the through-shaft 3 and the bottom of the refining furnace body 1 to drive the through-shaft 3 and the rotating cylinder 4 to rotate. The through-shaft 3 is hollow. The rotation drive structure includes a bucket-shaped connecting ring sleeve 7 and a transmission rack 9. The bucket-shaped connecting ring sleeve 7 is fixedly sleeved at the bottom of the through-shaft 3, and a transmission rack 8 is fixedly sleeved at the bottom of the bucket-shaped connecting ring sleeve 7. Transmission racks 9 are meshed on both sides of the transmission rack 8. The two transmission racks 9 are parallel to each other. A sliding mounting assembly is provided at the bottom of the transmission rack 9. Because in this invention, the main method of mixing the molten metal and the solid desulfurizing agent is to use argon gas to blow the molten metal, the main purpose of driving the rotating cylinder 4 to rotate is... In order to increase the blowing area of ​​argon gas through multiple blowing pipes 17, this application uses two transmission racks 9 to mesh with the transmission gear in sequence. That is, after one transmission rack 9 completely leaves the meshing area with the transmission ring 8, the other transmission rack 9 continues to mesh with the transmission ring 8 to achieve unidirectional long-distance transmission of the through shaft 3. Then, the two transmission racks 9 are used to move back and forth in sequence to achieve the reciprocating movement of the bucket-shaped connecting ring 7, the through shaft 3 and the rotating cylinder 4. Then, the transmission ring 8 will be rotated together with the refining furnace body 1 by the furnace body tilting device 2. At this time, the transmission rack 9 remains stationary or moves away from the transmission range of the transmission ring 8, so that the transmission gear can be smoothly reset later. The sliding mounting assembly includes a sliding support 10 and a first hydraulic cylinder 12. The top of the sliding support 10 is provided with a sliding protrusion 11, and the bottom end of the transmission rack 9 is provided with a transverse groove. The sliding protrusion 11 is slidably connected to the transverse groove. The first hydraulic cylinder 12 is provided on one side of the top of the sliding support 10. The output end of the first hydraulic cylinder 12 is connected to the transmission rack 9. When the first hydraulic cylinder 12 is activated, it drives the transmission rack 9 to move on the sliding support 10, so that the transmission rack 9 meshes with the transmission ring 8, thereby driving the through shaft 3 and other components to rotate. The transmission rack 9 is slidably connected to the transverse groove through the sliding protrusion 11, ensuring the stable lateral movement of the transmission rack 9.

[0028] like Figures 1 to 7 As shown, in this embodiment, the top of the rotating cylinder 4 is set as a permeable layer 13. In the prior art, the bottom of the refining furnace body 1 is usually a permeable brick layer, so that the argon gas at the bottom of the refining furnace body 1 can pass through the permeable brick layer and contact the molten metal to complete the argon bottom blowing operation. The permeable layer 13 used in this invention also has the effect of argon gas penetration. The top circumference of the rotating cylinder 4 is provided with multiple connecting installation components. The connecting installation components include a hollow cylinder seat 14. The hollow cylinder seat 14 is connected through the air-permeable layer 13. The stirring plate 5 is fixedly connected to the top of the hollow cylinder seat 14. The hollow cylinder seat 14 is used to install the stirring plate 5 and to keep the air supply line 6 and the air blowing line 17 connected. Subsequently, the air supply line 6 can pull the air blowing line 17 to move. The top of the connecting installation assembly is connected to a curved gas injection structure that can inject gas into the middle of the refining furnace body 1. A stirring plate 5 is fixedly sleeved on the outside of the curved gas injection structure. The stirring plate 5 rotates with the rotating cylinder 4 to stir the molten metal in the refining furnace body 1. The stirring plate 5 and the curved fixed pipe 15 used in this invention are both made of heat-resistant steel. In the process of manufacturing the stirring plate 5 and the curved fixed pipe 15, a layer of aluminum-carbon refractory material or aluminum-zirconium-carbon refractory material is also processed on the outside of the stirring plate 5 and the curved fixed pipe 15 by casting. This is to prevent the stirring plate 5 and the curved fixed pipe 15 from melting with the molten metal, which would affect the durability of the stirring plate 5 and the curved fixed pipe 15 and cause impurity of the molten metal. The curved air injection structure includes a curved fixed pipe 15, an air blowing pipe 17, and a counterweight rod 21. The curved fixed pipe 15 is connected to the top of the hollow cylinder base 14. The stirring plate 5 is fixedly connected to the outer wall of the curved fixed pipe 15. Multiple air blowing holes 16 are opened along the curve at the top of the curved fixed pipe 15. The air blowing pipe 17 is slidably disposed inside the curved fixed pipe 15. One side of the air blowing pipe 17 is connected to the air supply pipe 6. A closed sleeve 18 is fitted on the air blowing pipe 17. Multiple air outlet slots 19 are opened on the closed sleeve 18. Air outlet holes 20 are opened on the area of ​​the air blowing pipe 17 corresponding to the air outlet slots 19. The other side of the air blowing pipe 17 is fixedly connected to the counterweight rod 21, which is vertically slidably disposed in the curved fixed pipe 15. When argon needs to be blown into the middle of the molten metal, argon is added to the blowing pipe 17 through the gas supply pipe 6. Then, by moving the gas supply pipe 6, the blowing pipe 17 and the sealing sleeve are moved within the curved fixed pipe 15, so that the gas outlet 19 and the gas outlet 20 are aligned with the blowing hole 16. Then, the argon is blown out through multiple blowing holes 16. During the melting of pure iron, the sealing sleeve 18 is used to seal the blowing pipe to prevent the molten metal from contacting the blowing pipe 17. Before stopping the blowing, the gas supply pipe 6 is moved into the curved fixed pipe 15. Under the action of the counterweight rod 21, the blowing pipe 17 and the sealing sleeve 18 are moved to seal the blowing hole 16 and prevent molten iron from entering the blowing pipe 17.

[0029] It should be further explained that when adding pure iron raw materials into the refining furnace body 1, the stirring plate 5 can protect the bent and fixed pipe 15. Since the stirring plate 5 and the bent and fixed pipe 15 occupy a small area, they will not occupy too much of the amount of pure iron raw materials added into the refining furnace body 1.

[0030] The bottom of the curved gas injection structure is connected to a gas supply pipe 6. Multiple gas supply pipes 6 pass through the rotating shaft 3 and exit from the bottom of the refining furnace body 1. An argon bottom blowing assembly is installed between the gas supply pipes 6 and the top of the rotating cylinder 4. The argon bottom blowing assembly includes a permeable cylinder 22, a partition ring frame 23, and an exhaust valve pipe 25. The permeable cylinder 22 is fixedly connected inside the rotating cylinder 4. The top of the rotating shaft 3 is connected to the middle of the bottom end of the permeable cylinder 22. Argon can be discharged through the side wall and permeable layer 13 of the permeable cylinder 22. A partition ring frame 23 is fixedly connected inside the permeable cylinder 22. Multiple guide cylinders 24 are connected to the inner arc surface of the partition ring frame 23. Each guide cylinder 24 corresponds to a gas supply pipe 6. The gas supply pipe 6 is slidably installed inside the guide cylinder 24. The gas supply pipe 6 is located in the permeable layer 13. An exhaust valve pipe 25 is connected to the area between the gas cylinder 22 and the outer arc surface of the partition ring 23. When the gas supply pipeline 6 delivers argon, the exhaust valve pipe 25 can directly discharge some argon into the area between the gas cylinder 22 and the outer arc surface of the partition ring 23. The side wall of the gas cylinder 22 can be penetrated by argon, allowing argon to enter the rotating cylinder 4 and finally be discharged through the permeable layer 13. Then, argon bottom blowing can be performed on the molten metal near the inner side wall of the refining furnace 1. The partition ring 23 can isolate the argon discharge area, reduce the argon flow area, and facilitate argon to enter the rotating cylinder 4 more fully. The guide cylinder 24 is used to restrict the movement area of ​​the gas supply pipeline 6, so as to ensure that the gas supply pipeline 6 does not bend and delivers gas stably.

[0031] In this embodiment, a lifting slide 26 is fixedly connected to the bottom end of the refining furnace body 1 via a connecting frame. The lifting slide 26 is located at the bottom end of the through-rotating shaft 3. A gas filling cylinder 27 is longitudinally slidably connected inside the lifting slide 26. A gas filling pipe 28 is connected to the bottom end of the gas filling cylinder 27. Multiple gas supply pipes 6 are connected to the gas filling cylinder 27. Argon gas can be injected into the gas filling cylinder 27 through the gas filling pipe 28, and then the argon gas is delivered to the multiple gas supply pipes 6. By adjusting the position of the gas filling cylinder 27 inside the lifting slide 26, the gas supply pipes 6 and the blowing pipes 17 can be moved. A branch pipe disc 29 is fixedly connected to the inner top of the through-shaft 3. Multiple outlets are opened on the branch pipe disc 29. The gas supply pipe 6 passes through the corresponding outlet. A rotating sealing plate 30 is rotatably connected to the top of the gas cylinder body 27. The bottom end of the gas supply pipe 6 passes through the rotating sealing plate 30. A connecting rod 31 is fixedly connected between the rotating sealing plate 30 and the branch pipe disc 29. When the through-shaft 3 is rotated, multiple gas supply pipes 6 rotate together with the rotating cylinder body 4, and the branch pipe disc 29 also rotates with the through-shaft 3. Under the action of the connecting rod 31, the branch pipe disc 29 drives the rotating sealing plate 30 to rotate together, so that the gas supply pipe 6 maintains its connection with the gas cylinder body 27 during the rotation process. A second hydraulic cylinder 32 is provided at the bottom of the lifting slide 26. The output end of the second hydraulic cylinder 32 is fixedly connected to the bottom end of the gas cylinder body 27. It is used to drive the gas cylinder body 27, the gas supply line 6 and the air blowing line 17 to move. Activating the second hydraulic cylinder 32 can adjust the position of the gas cylinder body 27 in the lifting slide 26, thereby pulling the gas supply line 6 and the air blowing line 17.

[0032] like Figures 1 to 9 As shown in Embodiment 2, after the argon bottom-blowing technology is used to desulfurize the molten metal, the resulting slag will float on the surface of the molten metal. The invention also includes a slag-collecting mechanism that cooperates with multiple stirring plates 5. The slag-collecting mechanism includes a vertical sleeve 33, with a funnel-shaped cylinder 34 fixedly connected to the bottom of the vertical sleeve 33. A rotating ring 35 is rotatably connected to the top of the vertical sleeve 33. A motor drive device 36 is provided on one side of the top of the vertical sleeve 33. Both the output end of the motor drive device 36 and the rotating ring 35 are equipped with transmission gears 37, which are engaged in transmission. A curved pipe 38 is provided inside the funnel-shaped cylinder 34, and the bottom of the curved pipe 38 is laterally connected to a slag-collecting device. The top of the cylinder 39 and the curved pipe 38 are connected to the inner arc surface of the rotating ring 35. The side wall of the slag removal cylinder 39 is also provided with a slag inlet groove. The slag removal cylinder 39 is higher than the bottom of the curved pipe 38. The top of the furnace body tilting device 2 is equipped with a hydraulic cylinder device 41 that drives the vertical sleeve 33 to move longitudinally. First, when it is necessary to add pure iron raw materials into the refining furnace body 1, in order to avoid the pure iron raw materials from contacting the top of the stirring plate 5 during the addition process, causing the pure iron raw materials to collide with the top of the stirring plate 5, the internal shape of the funnel-shaped cylinder 34 restricts the pure iron raw materials so that after they are added into the funnel-shaped cylinder 34, they will only be added to the area between multiple stirring plates 5, thereby achieving protection for multiple stirring plates 5. After the pure iron raw material is smelted into molten metal, the bottom of the funnel-shaped cylinder 34 is brought into contact with the liquid level end of the molten metal. As slag continuously floats on the top of the molten metal, it accumulates inside the funnel-shaped cylinder 34, reducing the slag's distribution area within the molten metal. Then, the drive motor drives the device 36, which, through the meshing of two transmission gears 37, drives the rotating ring 35, the curved pipe 38, and the slag-removing cylinder 39 to rotate together along the center point of the rotating ring 35. The slag-removing cylinder 39 then removes the slag from the surface of the molten metal. The length of 9 is nearly equal to the diameter of the inner arc surface of the vertical sleeve 33, so the slag removal cylinder 39 can effectively remove the slag from the surface of the molten metal. Then, the vertical sleeve 33, the funnel-shaped cylinder 34 and the slag removal cylinder 39 are driven to rise by the hydraulic cylinder device 41, so that the slag removal cylinder 39 rises to a position that is flush with the slag outlet 40 required on the refining furnace body 1. After receiving the bottom of the slag removal cylinder 39, the slag can be manually removed, or the slag can be flushed out into the slag removal cylinder 39 through the top of the curved pipe 38 using the hydraulic principle.

[0033] The working principle of the desulfurization refining furnace used in pure iron smelting: First, the pure iron raw material to be smelted is added into the refining furnace body 1. The electrode is inserted into the refining furnace body 1. Then, the pure iron raw material is melted into a molten metal. A desulfurizing agent is added to the molten metal. Then, the first hydraulic cylinder 12 is started to drive the transmission rack 9 to move on the sliding support 10. After the transmission rack 9 meshes with the transmission ring 8, it drives the through shaft 3 and other components to rotate, so that multiple stirring plates 5 rotate in the refining furnace body 1. At the same time, argon gas can be added into the gas cylinder 27 through the gas filling pipe 28. Then, the argon gas is delivered to multiple gas supply pipes 6. The position of the gas filling cylinder 27 in the lifting slide 26 is adjusted, which drives the gas supply pipe 6 and the blowing pipe 17 to move so that the gas outlet 19 and the gas outlet 20 are aligned with the blowing hole 16. Then, the argon gas is blown out through multiple blowing holes 16 to perform argon gas blowing operation on the middle part of the refining furnace body 1. When argon is supplied through the gas supply pipeline 6, the exhaust valve pipe 25 can directly discharge some of the argon into the area between the outer arc surface of the permeable cylinder 22 and the partition ring frame 23. Then the argon enters the rotating cylinder 4 and is finally discharged through the permeable layer 13. After that, argon bottom blowing can be performed on the molten metal near the inner wall of the refining furnace 1 to fully mix the molten metal and the solid desulfurizing agent. Then, the sulfides in the molten metal form slag that floats on the surface of the molten metal. The slag is cleaned up. After desulfurization is completed, the refining furnace is rotated by the furnace body tilting device 2 to discharge the molten metal.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. 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 of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A desulfurization refining furnace for pure iron smelting, comprising a refining furnace body (1), wherein the refining furnace body (1) is provided with a furnace body tilting device (2), characterized in that, Also includes: A through-rotating shaft (3) is rotatably connected to the bottom of the refining furnace body (1). A rotating cylinder (4) is provided at the top of the through-rotating shaft (3). A rotation drive structure is provided between the through-rotating shaft (3) and the bottom of the refining furnace body (1) to drive the through-rotating shaft (3) and the rotating cylinder (4) to rotate. The through-rotating shaft (3) is hollow. The rotating cylinder (4) is provided with a plurality of the connecting installation components on its top circumference. The top of the connecting installation components is connected to a curved gas injection structure that can inject gas into the middle of the refining furnace body (1). A stirring plate (5) is fixedly sleeved on the outside of the curved gas injection structure. The stirring plate (5) rotates with the rotating cylinder (4) to stir the molten metal in the refining furnace body (1). Gas supply pipeline (6), the bottom of the curved gas injection structure is connected to the gas supply pipeline (6), multiple gas supply pipelines (6) pass through the through shaft (3) and move out from the bottom of the refining furnace body (1), and an argon bottom blowing assembly is provided between the gas supply pipeline (6) and the top of the rotating cylinder (4).

2. The desulfurization refining furnace for pure iron smelting according to claim 1, characterized in that, The rotation drive structure includes: Bucket-shaped connecting ring sleeve (7), the bottom of the through rotating shaft (3) is fixedly sleeved with the bucket-shaped connecting ring sleeve (7), and the bottom of the bucket-shaped connecting ring sleeve (7) is fixedly sleeved with a transmission gear ring (8). The transmission rack (9) is provided on both sides of the transmission ring (8), the two transmission racks (9) are parallel to each other, and the bottom of the transmission rack (9) is provided with a sliding mounting component.

3. The desulfurization refining furnace for pure iron smelting according to claim 2, characterized in that, The sliding mounting assembly includes: A sliding support (10) is provided with a sliding protrusion (11) on its top, and a transverse groove is provided at the bottom end of the transmission rack (9). The sliding protrusion (11) is slidably connected to the transverse groove. The first hydraulic cylinder (12) is provided on one side of the top of the sliding support (10), and the output end of the first hydraulic cylinder (12) is connected to the transmission rack (9).

4. The desulfurization refining furnace for pure iron smelting according to claim 1, characterized in that, The top of the rotating cylinder (4) is provided as a breathable layer (13).

5. A desulfurization refining furnace for pure iron smelting according to claim 4, characterized in that, The connectivity installation component includes: Hollow cylinder seat (14), through which the air-permeable layer (13) is connected, and the stirring plate (5) is fixedly connected to the top of the hollow cylinder seat (14).

6. A desulfurization refining furnace for pure iron smelting according to claim 5, characterized in that, The curved air injection structure includes: A curved fixed pipe (15) is connected to the top of the hollow cylinder seat (14), and the stirring plate body (5) is fixedly connected to the outer wall of the curved fixed pipe (15). The top of the curved fixed pipe (15) is provided with multiple air blowing holes (16) along the curve. An air blowing pipe (17) is slidably disposed within the curved fixed pipe (15). One side of the air blowing pipe (17) is connected to the air supply pipe (6). A closed sleeve (18) is fitted on the air blowing pipe (17). Multiple air outlet slots (19) are opened on the closed sleeve (18). An air outlet hole (20) is opened on the area of ​​the air blowing pipe (17) corresponding to the air outlet slots (19). The counterweight rod (21) is fixedly connected to the other side of the air blowing pipe (17), and the counterweight rod (21) is vertically slidably disposed in the curved fixed pipe (15).

7. A desulfurization refining furnace for pure iron smelting according to claim 6, characterized in that, The argon bottom blowing assembly includes: The ventilated cylinder (22) is fixedly connected inside the rotating cylinder (4). The top end of the through-rotating shaft (3) is connected to the middle of the bottom end of the ventilated cylinder (22). Argon gas can be discharged through the side wall of the ventilated cylinder (22) and the ventilated layer (13). The partition ring frame (23) is fixedly connected inside the ventilated cylinder (22). Multiple guide cylinders (24) are connected to the inner arc surface of the partition ring frame (23). The guide cylinders (24) correspond one-to-one with the air supply pipes (6). The air supply pipes (6) are slidably arranged inside the guide cylinders (24). The exhaust valve pipe (25) is located in the area between the air supply pipe (6) and the outer arc surface of the partition ring frame (23) inside the air vent (22).

8. A desulfurization refining furnace for pure iron smelting according to claim 7, characterized in that, The bottom end of the refining furnace body (1) is fixedly connected to a lifting slide cylinder (26) via a connecting frame. The lifting slide cylinder (26) is located at the bottom end of the through rotating shaft (3). A gas filling cylinder body (27) is longitudinally slidably connected inside the lifting slide cylinder (26). A gas filling pipeline (28) is connected to the bottom end of the gas filling cylinder body (27). Multiple gas supply pipelines (6) are connected to the gas filling cylinder body (27).

9. A desulfurization refining furnace for pure iron smelting according to claim 8, characterized in that, The inner top of the through-rotating shaft (3) is fixedly connected to a branch pipe disc (29), and the branch pipe disc (29) is provided with multiple outlets. The gas supply pipe (6) passes through the corresponding outlet. The top of the gas cylinder body (27) is rotatably connected to a rotating sealing plate (30), and the bottom end of the gas supply pipe (6) passes through the rotating sealing plate (30). A connecting rod (31) is fixedly connected between the rotating sealing plate (30) and the branch pipe disc (29).

10. A desulfurization refining furnace for pure iron smelting according to claim 9, characterized in that, The bottom of the lifting slide (26) is provided with a second hydraulic cylinder (32), the output end of the second hydraulic cylinder (32) is fixedly connected to the bottom end of the gas cylinder body (27), and is used to drive the gas cylinder body (27), the gas supply pipeline (6) and the air blowing pipeline (17) to move.

Images