Molten iron slagging device for intermediate frequency furnace

Abstract

This application discloses a slag removal device for molten iron in a medium-frequency furnace, including a slag removal shovel, a conversion mechanism and a slag filter bin on both sides of the slag removal shovel, and a guide roller rotatably connected between the two. The guide roller is connected to the conversion mechanism. A drive assembly is located at the end of the square vertical bin of the slag removal shovel away from the conversion mechanism, and the drive assembly is connected to the conversion mechanism. The conversion mechanism includes a drive bin containing a gear, a gear ring, a fixed ring, a ratchet, and thorns. A drive coil is coaxially mounted on the gear, wound with a guide rope and connected to the drive assembly. A first torsion spring is provided between the drive coil and the drive bin. The drive assembly drives the gear to rotate via the guide rope, which in turn drives the fixed ring via the gear ring. The thorns engage / disengage with the ratchet to achieve unidirectional rotation of the guide roller, which, together with the guide fins, guides the molten slag to the slag filter bin. The slag filter screen at the bottom of the slag filter bin separates the molten slag. This achieves directional slag conveying and prevents backflow, improves slag removal efficiency, reduces labor intensity, and is suitable for high-efficiency slag removal operations in medium-frequency furnaces.

Description

Technical Field

[0001] This application belongs to the field of metal smelting technology, and specifically relates to a device for removing slag from molten iron in a medium-frequency furnace. Background Technology

[0002] Medium-frequency furnaces, as key equipment in the field of metal smelting, melt metallic materials through electromagnetic induction heating and are widely used in the production of cast iron, cast steel, and alloy materials. During the molten iron smelting process, a layer of slag with a low melting point forms on the surface of the molten iron due to the chemical reactions of metal oxides, impurities, and fluxes. The presence of slag not only reduces the purity of the molten iron, affecting the quality of castings, but also hinders heat transfer and reduces smelting efficiency. Therefore, timely and efficient removal of slag from the surface of molten iron is a crucial step in the medium-frequency furnace smelting process.

[0003] Some companies use simple mechanical slag removal equipment, such as fixed scrapers or pneumatic push rod mechanisms, but the following technical bottlenecks still exist: lack of directional conveying structure, molten slag easily slips from the shovel body back into the molten iron after slag removal, requiring repeated operation; at the same time, most devices do not have integrated filtration function, and operators need to repeatedly transfer the slag to external equipment to separate the molten iron after slag removal, which is a cumbersome process.

[0004] To address the aforementioned issues, there is an urgent need for a medium-frequency furnace molten iron slag removal device that can achieve directional conveying, filtration and separation, and is easy to operate. Utility Model Content

[0005] This application provides a medium-frequency furnace molten iron slag removal device, which solves the problems of frequent repetitive operations, easy slag slippage, and inconvenient filtration and separation during the slag removal process by innovatively designing the connection between the conversion mechanism and the drive component.

[0006] To achieve the above objectives, this application provides a medium-frequency furnace molten iron slag removal device, including a slag removal shovel. A conversion mechanism and a slag filter bin are respectively provided on both sides of the slag removal shovel. A guide roller is rotatably arranged between the conversion mechanism and the slag filter bin. The guide roller is connected to the conversion mechanism. A drive component is provided at the end of the square vertical compartment of the slag removal shovel away from the conversion mechanism. The drive component is connected to the conversion mechanism.

[0007] The conversion mechanism includes a drive chamber fixedly mounted on the side of the slag-removing shovel. A gear and a fixed ring are rotatably mounted inside the drive chamber. A toothed ring is coaxially fitted on the surface of the fixed ring and meshes with the gear. A rotating shaft is rotatably mounted inside the drive chamber corresponding to the fixed ring. A ratchet is mounted at one end of the rotating shaft located inside the fixed ring, and the portion of the rotating shaft located inside the slag-removing shovel is connected to the guide roller. A thorn is rotatably mounted on the side of the fixed ring near the ratchet. A drive coil is coaxially fixedly mounted on the gear. A guide rope is wound around the drive coil. The guide rope is connected to the drive assembly through a guide component. A first torsion spring is provided between the drive coil and the inner wall of the drive chamber.

[0008] In one embodiment, the guiding assembly includes a conversion chamber fixedly disposed on the side wall of the slag shovel. The conversion chamber is connected to the drive chamber through a connecting slot. A guide wheel assembly is disposed inside the conversion chamber. The guide rope is connected to the guide wheel assembly and the drive assembly through the connecting slot.

[0009] In one embodiment, the drive assembly includes a groove extending through the side wall of the square vertical compartment away from the slag-removing shovel, and a sliding handle is slidably disposed in the groove, the sliding handle being connected to the guide rope.

[0010] In one embodiment, a sliding column is fixedly provided at the top of the square vertical compartment, the sliding handle is slidably connected to the sliding column, a compression spring is provided between the sliding handle and the top of the square vertical compartment, and a fixed pressure rod is also provided at the top of the square vertical compartment.

[0011] In one embodiment, a fixing pressure bar is also provided at the top of the square vertical compartment.

[0012] In one embodiment, a second torsion spring is provided on the connecting shaft between the thorn and the retaining ring.

[0013] In one embodiment, a plurality of guide fins are uniformly fixedly arranged around the circumference of the surface of the guide roller.

[0014] In one embodiment, a filter screen is provided at the bottom of the filter residue bin.

[0015] Compared with the prior art, the beneficial effects of this application are: Directional conveying and anti-backflow design ensure efficient slag separation: The device utilizes a ratchet-thorn unidirectional transmission structure in the conversion mechanism (ratchet, thorn, and fixed ring linked together), combined with gear and gear ring meshing transmission, to achieve intermittent unidirectional rotation control of the guide roller. When the drive component releases tension, the fixed ring drives the thorn to engage with the ratchet, driving the guide roller to directionally convey the slag; when the drive component is tensioned, the thorn and ratchet slide apart, and the guide roller comes to rest. This design ensures that the slag is directionally conveyed only along the direction from the slag shovel to the slag bin, effectively avoiding reverse backflow, preventing slag from accumulating and clogging in the slag shovel, and improving the continuity of a single slag removal operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the slag removal device for molten iron in a medium-frequency furnace provided in this application; Figure 2 A schematic diagram of the internal connections of the medium-frequency furnace molten iron slag removal device provided in this application; Figure 3 For this application Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the internal structure of the toothed ring of the medium-frequency furnace molten iron slag removal device provided in this application; Figure 5 A schematic diagram of the drive components for the medium-frequency furnace molten iron slag removal device provided in this application; Figure 6 A schematic diagram of the guide roller of the medium-frequency furnace molten iron slag removal device provided in this application; Figure 7 This is a schematic diagram of the conversion mechanism of the medium-frequency furnace molten iron slag removal device provided in this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Square vertical bin; 2. Slag scoop; 3. Conversion mechanism; 31. Drive bin; 32. Gear; 33. Gear ring; 34. Ratchet; 35. Drive coil; 36. Connecting slot; 37. Guide rope; 38. Conversion bin; 39. Fixing ring; 310. Spike; 311. Rotating shaft; 312. Guide wheel assembly; 313. First torsion spring; 4. Filter bin; 5. Drive assembly; 51. Slide groove; 52. Slide column; 53. Sliding handle; 54. Compression spring; 55. Fixing pressure rod; 6. Guide roller; 7. Guide fin. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0020] See Figures 1 to 7 As shown, the medium-frequency furnace molten iron slag removal device provided in this application includes a slag removal shovel 2. A conversion mechanism 3 and a slag filter bin 4 are respectively provided on both sides of the slag removal shovel 2. A guide roller 6 is rotatably arranged between the conversion mechanism 3 and the slag filter bin 4. The guide roller 6 is connected to the conversion mechanism 3. A drive component 5 is provided at the end of the square vertical bin 1 of the slag removal shovel 2 away from the conversion mechanism 3. The drive component 5 is connected to the conversion mechanism 3.

[0021] During the smelting process in an intermediate frequency furnace, a layer of slag forms on the surface of the molten iron. If this slag is not cleaned in time, it will affect the purity of the molten iron and the smelting efficiency. When performing slag removal from the molten iron surface, the operator uses a square vertical bin 1 to align the slag removal shovel 2 with the slag layer on the surface of the molten iron inside the intermediate frequency furnace, and slowly moves the slag removal shovel 2 to cut into the slag layer, thus allowing the slag to enter the interior of the slag removal shovel 2. After the slag removal shovel 2 cuts into the slag layer, the operator uses the drive assembly 5 to drive the conversion mechanism 3, which in turn drives the guide roller 6 to rotate. The slag filter bin 4 has a guide port on the rear side wall of the guide roller 6. When the guide roller 6 rotates, it guides the slag inside the slag removal shovel 2 to its rear, allowing it to enter the slag filter bin 4 through the guide port on the side wall. The slag is then filtered and separated in the slag filter bin 4, and the separated slag is temporarily stored inside the slag filter bin 4 for subsequent centralized processing or recycling.

[0022] The conversion mechanism 3 includes a drive chamber 31 fixedly disposed on the side of the slag shovel 2. A gear 32 and a fixed ring 39 are rotatably disposed inside the drive chamber 31. A toothed ring 33 is coaxially sleeved on the surface of the fixed ring 39 and meshes with the gear 32. A rotating shaft 311 is rotatably disposed inside the drive chamber 31 corresponding to the fixed ring 39. A ratchet 34 is disposed at one end of the rotating shaft 311 located inside the fixed ring 39, and the part located inside the slag shovel 2 is connected to the guide roller 6. A thorn 310 is rotatably disposed on the side of the fixed ring 39 near the ratchet 34. A drive coil 35 is coaxially fixedly disposed on the gear 32. A guide rope 37 is wound on the drive coil 35 and connected to the drive assembly 5 through a guide component. A first torsion spring 313 is disposed between the drive coil 35 and the inner wall of the drive chamber 31.

[0023] The operator adjusts the guide rope 37 through the drive component 5. Under the action of the guide component, the guide rope 37 drives the drive coil 35 to rotate. When the drive coil 35 rotates, it drives the gear 32 to rotate synchronously. The rotation of the gear 32 drives the fixed ring 39 to rotate synchronously through the gear ring 33.

[0024] When the guide rope 37 is in a tensioned state through the drive assembly 5, the counterclockwise rotation of the drive coil 35 synchronously causes the first torsion spring 313 to be in an energy storage state. The toothed ring 33 drives the fixed ring 39 to rotate clockwise under the meshing action of the gear 32. At this time, the thorn 310 on the fixed ring 39 slides against the surface of the ratchet 34 without interference. The ratchet 34 remains stationary, so that the ratchet 34 cannot drive the rotating shaft 311 to rotate synchronously. That is, the guide roller 6 is stationary, and the molten slag inside the slag shovel 2 will not be guided and conveyed.

[0025] When the drive assembly 5 releases the tension of the guide rope 37, the first torsion spring 313 releases its stored energy, and the drive coil 35 rotates clockwise, driving the gear 32 to rotate clockwise while simultaneously causing the guide rope 37 to wind back around the drive coil 35. At this time, the toothed ring 33 rotates counterclockwise and drives the fixed ring 39 to rotate counterclockwise. The thorns 310 on the fixed ring 39 engage with the ratchet 34, driving the ratchet 34 to rotate synchronously. Driven by the thorns 310, the ratchet 34 begins to rotate counterclockwise, thereby driving the rotating shaft 311 to rotate synchronously. The rotation of the rotating shaft 311 is transmitted to the guide roller 6, causing it to start rotating and conveying the molten slag inside the slag shovel 2. At this time, the molten slag is evenly guided into the slag chamber 4 through the guide roller 6, completing the filtration and temporary storage of the molten slag. The rotating shaft 311 and the side wall of the drive chamber 31 near the guide roller 6 are rotatably connected by a bearing seal to prevent molten slag from entering the drive chamber 31.

[0026] Through the linkage design between the fixed ring 39, the thorn 310, and the ratchet 34, the intermittent drive control of the guide roller 6 under specific conditions is achieved. This ensures that the guide roller 6 can only rotate in one direction during molten slag conveying, guaranteeing the directional conveying of molten slag and effectively preventing molten slag backflow. Simultaneously, the guide roller 6 continuously conveys the molten slag inside the slag scraper 2 to the slag filter bin 4, preventing molten slag accumulation inside the slag scraper 2 and avoiding the need for frequent cleaning by operators, thus improving overall work efficiency.

[0027] Optionally, the guiding assembly includes a conversion chamber 38 fixedly disposed on the side wall of the slag shovel 2. The conversion chamber 38 is connected to the drive chamber 31 through a connecting slot 36. A guide wheel assembly 312 is disposed inside the conversion chamber 38. The guide rope 37 is connected to the guide wheel assembly 312 and the drive assembly 5 through the connecting slot 36.

[0028] In this embodiment, the guide wheel assembly 312 consists of multiple guide wheels rotatably arranged inside the conversion chamber 38. The guide rope 37 achieves direction conversion through the multiple guide wheels, so that the guide rope 37 can be smoothly introduced into the conversion chamber 38 from the drive assembly 5 through the connecting slot 36 and establish a stable connection with the drive assembly 5.

[0029] Optionally, the drive assembly 5 includes a groove 51 extending through the side wall of the square vertical compartment 1 away from the slag shovel 2, and a sliding handle 53 is slidably disposed in the groove 51, the sliding handle 53 being connected to the guide rope 37.

[0030] A sliding column 52 is fixedly installed on the top of the square vertical compartment 1, and a sliding handle 53 is slidably connected to the sliding column 52. A compression spring 54 is provided between the sliding handle 53 and the top of the square vertical compartment 1. In this embodiment, the operator places their palm against the top of the square vertical compartment 1, grips the sliding handle 53 with their fingers, and pulls the sliding handle 53 upward along the slide column 52 near the fixed pressure rod 55. The compression spring 54 is compressed and stores elastic potential energy. When the sliding handle 53 slides in this direction, the guide rope 37 will be pulled and in a tensioned state. During this process, the drive coil 35 is driven to rotate, thereby causing the first torsion spring 313 to store elastic potential energy.

[0031] When the sliding handle 53 is pulled upward to the top, the elastic potential energy stored in the compression spring 54 will reach its maximum value. At this time, the operator releases the sliding handle 53, and the compression spring 54 releases its elastic potential energy to push the sliding handle 53 to slide downward along the slide column 52 to reset. The guide rope 37 is then relaxed. At this time, with the guide rope 37 relaxed, the first torsion spring 313 releases the previously stored elastic potential energy, causing the gear 32 to rotate and drive the ratchet 34 to move through the gear ring 33, thereby realizing the intermittent unidirectional drive control of the guide roller 6.

[0032] Optionally, a fixing rod 55 is also provided on the top of the square vertical compartment 1. The fixing rod 55 makes it easier for the operator to hold the square vertical compartment 1, improving its portability.

[0033] Optionally, a second torsion spring is provided on the connecting shaft between the thorn 310 and the retaining ring 39. By providing the second torsion spring, the thorn 310 can maintain a stable engagement with the ratchet 34, improving the stability of the retaining ring 39 when the ratchet 34 rotates, and preventing slippage or misalignment.

[0034] Optionally, a plurality of guide fins 7 are uniformly fixed around the circumference of the surface of the guide roller 6. When the guide fins 7 rotate counterclockwise with the guide roller 6, they can push the molten slag located on the outer edge of the slag scraper 2 into its interior, thereby improving the efficiency of the molten slag entering the slag filter bin 4 from the slag scraper 2.

[0035] Optionally, a slag filter screen is provided at the bottom of the slag filter bin 4. The slag filter screen filters out impurities in the molten slag, causing the impurities to remain on the surface of the slag filter screen, while the filtered molten iron flows back into the furnace.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A slag removal device for molten iron in a medium-frequency furnace, characterized in that: Includes a slag shovel (2), on both sides of the slag shovel (2) are respectively provided a conversion mechanism (3) and a filter bin (4), a guide roller (6) is rotatably provided between the conversion mechanism (3) and the filter bin (4), the guide roller (6) is connected to the conversion mechanism (3), and a drive assembly (5) is provided at the end of the square vertical bin (1) of the slag shovel (2) away from the conversion mechanism (3), the drive assembly (5) is connected to the conversion mechanism (3); The conversion mechanism (3) includes a drive chamber (31) fixedly mounted on the side of the slag shovel (2). A gear (32) and a fixed ring (39) are rotatably mounted inside the drive chamber (31). A toothed ring (33) is coaxially mounted on the surface of the fixed ring (39). The toothed ring (33) meshes with the gear (32). A rotating shaft (311) is rotatably mounted inside the drive chamber (31) corresponding to the fixed ring (39). A ratchet (3) is mounted at one end of the rotating shaft (311) located inside the fixed ring (39). 4), and the part located inside the slag shovel (2) is connected to the guide roller (6). The fixed ring (39) is rotatably provided with a thorn (310) on the side near the ratchet (34). A drive coil (35) is coaxially fixed on the gear (32). A guide rope (37) is wound on the drive coil (35). The guide rope (37) is connected to the drive assembly (5) through the guide assembly. A first torsion spring (313) is provided between the drive coil (35) and the inner wall of the drive chamber (31).

2. The slag removal device for molten iron in a medium-frequency furnace according to claim 1, characterized in that: The guiding assembly includes a conversion chamber (38) fixedly installed on the side wall of the slag shovel (2). The conversion chamber (38) is connected to the drive chamber (31) through a connecting slot (36). A guide wheel assembly (312) is provided inside the conversion chamber (38). The guide rope (37) is connected to the guide wheel assembly (312) and the drive assembly (5) through the connecting slot (36).

3. The slag removal device for molten iron in a medium-frequency furnace according to claim 1, characterized in that: The drive assembly (5) includes a groove (51) extending through the side wall of the square vertical compartment (1) away from the slag shovel (2). A sliding handle (53) is slidably disposed in the groove (51), and the sliding handle (53) is connected to the guide rope (37).

4. The medium-frequency furnace molten iron slag removal device according to claim 3, characterized in that: A sliding column (52) is fixedly installed on the top of the square vertical compartment (1), and the sliding handle (53) is slidably connected to the sliding column (52). A compression spring (54) is provided between the sliding handle (53) and the top of the square vertical compartment (1).

5. The medium-frequency furnace molten iron slag removal device according to claim 4, characterized in that: The top of the square vertical compartment (1) is also provided with a fixing rod (55).

6. The slag removal device for molten iron in a medium-frequency furnace according to claim 1, characterized in that: A second torsion spring is provided on the connecting shaft of the thorn (310) and the fixing ring (39).

7. The slag removal device for molten iron in a medium-frequency furnace according to claim 1, characterized in that: Multiple guide fins (7) are uniformly fixed around the circumference of the surface of the guide roller (6).

8. The medium-frequency furnace molten iron slag removal device according to any one of claims 1-7, characterized in that: The bottom of the filter residue bin (4) is provided with a filter residue screen.

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