Intermediate frequency induction furnace for smelting of manganese steel

Abstract

This invention discloses a medium-frequency induction furnace for manganese steel smelting, specifically relating to the field of manganese steel smelting technology. It includes an induction furnace, a first slag removal assembly, and a second slag removal assembly. The first slag removal assembly includes a guide plate disposed at the upper end of the induction furnace, capable of scraping slag off the sidewall of the furnace opening. The second slag removal assembly includes a slag removal component disposed at the upper end of the induction furnace, capable of scooping out slag from inside the furnace by rotation. The guide plate guides the flow of molten material inside the furnace, causing the slag to accumulate towards the center of the furnace. During the slag removal process, the slag removal component, through reciprocating motion, shakes off the molten steel carried out during slag removal. This invention, by using the guide plate to scrape away the slag adhering to the inner wall of the furnace opening, and then pushing the slag towards the center of the furnace before using the slag removal component to remove it, prevents the slag from solidifying and adhering to the furnace wall, thus avoiding incomplete removal of oxide slag.

Description

Technical Field

[0001] This invention relates to the field of manganese steel smelting technology, and more specifically, to a medium-frequency induction furnace for manganese steel smelting. Background Technology

[0002] With industrial development, the requirements for the mechanical and technological properties of wear-resistant manganese steel are increasing. The purity of molten steel directly affects the wear resistance and service life of castings. Medium frequency induction furnace is a smelting equipment that uses the principle of electromagnetic induction to heat metal furnace charge. It has the advantages of fast heating speed, high thermal efficiency, less metal element oxidation and burning loss, uniform composition and temperature, and flexible process. Therefore, it is widely used in the production of wear-resistant manganese steel castings.

[0003] However, slag removal is required multiple times during the smelting of manganese steel. During slag removal, manganese steel, with its relatively low melting point, easily solidifies and adheres to the furnace wall in areas with lower temperatures, resulting in incomplete removal of oxide slag. The high manganese oxide content in the slag is reduced by carbon under reducing atmosphere and high temperature, causing phosphorus to re-enter the molten steel, increasing the brittleness of the castings. Furthermore, slag adhesion reduces the effective furnace volume, lowers electrical efficiency, and increases energy consumption. Cleaning slag adhesion is time-consuming and labor-intensive, and easily damages the furnace lining. Moreover, slag removal inevitably carries some molten steel with it. Manganese steel, due to its heavy deoxidation process, produces more slag than ordinary carbon steel. If the accumulated slag is excessive, slag removal before tapping will inevitably bring out a large amount of molten steel, resulting in the loss of finished steel. Therefore, this invention proposes a medium-frequency induction furnace for manganese steel smelting to solve the above problems. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a medium-frequency induction furnace for manganese steel smelting, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a medium-frequency induction furnace for manganese steel smelting, comprising: a first slag-removing assembly, the first slag-removing assembly including a guide plate disposed at the upper end of the induction furnace, the guide plate being capable of scraping slag off the side wall of the induction furnace opening; a second slag-removing assembly, the second slag-removing assembly including a slag-removing component disposed at the upper end of the induction furnace, the slag-removing component being capable of scooping out slag from inside the induction furnace by rotation; the guide plate being capable of guiding the molten material inside the furnace, causing the slag to accumulate towards the center of the induction furnace; and the slag-removing component being capable of shaking off the molten steel carried out during the slag-removing process through reciprocating motion.

[0006] Preferably, there are at least two guide plates arranged in a centrally symmetrical manner, and the side walls of the guide plates are provided with guide grooves, which can guide the molten material during the process of the guide plates scraping off slag.

[0007] Preferably, the upper end of the induction furnace is provided with a mounting component, one end of the mounting component is provided with a mounting cylinder, a hydraulic cylinder is fixedly connected to the side wall of the mounting cylinder, a piston rod is slidably connected inside the hydraulic cylinder, one end of the piston rod is fixedly connected to an electric actuator, and the output end of the electric actuator is fixedly connected to a guide plate.

[0008] Preferably, a sliding member is slidably connected inside the mounting cylinder, and an elastic member is provided inside the mounting cylinder. One end of the elastic member is fixedly connected to the inner wall of the mounting cylinder, and the other end of the elastic member is fixedly connected to the sliding member. An electric locking plate is fixedly connected to one end of the mounting cylinder, and the electric locking plate is magnetically connected to the sliding member.

[0009] Preferably, one end of the sliding member passes through the mounting cylinder and is rotatably connected to the slag-removing member, and a first motor is fixedly connected to the side wall of the sliding member near the slag-removing member, and the output end of the first motor is fixedly connected to the slag-removing member.

[0010] Preferably, the bottom of the induction furnace is provided with a base, a first support frame is fixedly connected to the base, a second support frame is rotatably connected to the first support frame, a support rod is slidably connected inside the second support frame, and the mounting component is provided on the top of the support rod.

[0011] Preferably, a second motor is fixedly connected to the end of the support rod away from the mounting component, and the output end of the second motor passes through the support rod and is fixedly connected to the mounting component. A third motor is fixedly connected to one end of the first support frame, and the output end of the third motor is fixedly connected to the second support frame.

[0012] Preferably, one end of the hydraulic cylinder has a first through hole, the side wall of the mounting cylinder has a second through hole, the first through hole and the second through hole are connected, the second through hole is connected to an external hydraulic source, and the side wall of the second support frame has a third through hole, which is connected to an external hydraulic source.

[0013] Preferably, when the electric locking plate is energized, the sliding member can slide inside the mounting cylinder by the attraction force of the electric locking plate, and the slag removal member is provided with multiple sieve holes for the flow of molten material.

[0014] Preferably, the induction furnace has support holes on both sides, and the first support frame is rotatably connected to the induction furnace through the support holes.

[0015] The technical effects and advantages of this invention are as follows: This invention uses a guide plate to scrape away the molten slag adhering to the inner wall of the induction furnace opening, preventing the problem of oxide slag adhering to the inner wall of the furnace opening during slag removal. At the same time, while scraping away the molten slag on the furnace wall, the guide plate pushes the slag to gather in the middle of the induction furnace, preventing the problem of incomplete slag removal. Meanwhile, during the slag removal process, the slag removal component reciprocates to shake off the molten steel carried out during slag removal, preventing the loss of finished molten steel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention in the slag removal state.

[0017] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of the present invention in the state before slag removal.

[0019] Figure 4 This is a schematic diagram of the structure of the first and second slag removal components of the present invention.

[0020] Figure 5 This is a schematic diagram of the guide plate structure of the present invention.

[0021] Figure 6 For the present invention Figure 2 An enlarged schematic diagram of the structure of part A.

[0022] Figure 7 This is a schematic diagram of the overall structure of the slag removal component of the present invention when it is far away from the induction furnace. The attached figures are labeled as follows: 1. Induction furnace; 11. Base; 12. First support frame; 13. Second support frame; 14. Support rod; 2. First slag removal assembly; 21. Guide plate; 22. Guide channel; 23. Hydraulic cylinder; 24. Electric push rod; 3. Second slag removal assembly; 31. Slag removal component; 32. Mounting component; 33. Mounting cylinder; 34. Sliding component; 35. Elastic component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0024] In actual production, manganese steel has a relatively low melting point and tends to solidify and adhere in areas with lower furnace wall temperatures during slag removal, resulting in incomplete removal of oxide slag. This embodiment was invented to solve the above problem.

[0025] Please seeFigures 1 to 7 As shown, an embodiment of the present invention provides a medium-frequency induction furnace for manganese steel smelting, comprising an induction furnace 1, a first slag removal assembly 2, and a second slag removal assembly 3. The first slag removal assembly 2 includes a guide plate 21 disposed at the upper end of the induction furnace 1, which can scrape off the slag on the side wall of the furnace opening of the induction furnace 1. The second slag removal assembly 3 includes a slag removal component 31 disposed at the upper end of the induction furnace 1, which can scoop out the slag from the inside of the induction furnace 1 by rotating. The guide plate 21 can guide the molten material in the furnace, causing the slag to gather in the middle of the induction furnace 1. During the process of scraping out the slag, the slag removal component 31 can shake off the molten steel brought out during the slag removal process through reciprocating motion.

[0026] Please see Figure 4 and Figure 5 As shown, there are at least two guide plates 21 arranged in a centrally symmetrical manner. The side wall of the guide plate 21 is provided with a guide groove 22. The guide groove 22 can guide the molten material during the process of scraping slag by the guide plate 21. The guide plate 21 is arc-shaped, and the guide groove 22 is located at the bottom of the guide plate 21.

[0027] Please see Figure 2 and Figure 3 As shown, an installation component 32 is provided at the upper end of the induction furnace 1. An installation cylinder 33 is provided at one end of the installation component 32. A hydraulic cylinder 23 is fixedly connected to the side wall of the installation cylinder 33. A piston column is slidably connected inside the hydraulic cylinder 23. An electric push rod 24 is fixedly connected to one end of the piston column. The output end of the electric push rod 24 is fixedly connected to the guide plate 21.

[0028] Please see Figure 2 and Figure 6 As shown, a sliding member 34 is slidably connected inside the mounting cylinder 33, and an elastic member 35 is provided inside the mounting cylinder 33. One end of the elastic member 35 is fixedly connected to the inner wall of the mounting cylinder 33, and the other end of the elastic member 35 is fixedly connected to the sliding member 34. An electromagnetic locking plate is fixedly connected to one end of the mounting cylinder 33, and the electromagnetic locking plate is magnetically connected to the sliding member 34. The mounting cylinder 33 is made of high-temperature resistant heat-insulating material and is also made of electromagnetic shielding material. The elastic member 35 is made of non-magnetic material, such as a pneumatic spring. This is existing technology and will not be described in detail here.

[0029] Please see Figure 4 and Figure 6 As shown, one end of the sliding member 34 passes through the mounting cylinder 33 and is rotatably connected to the slag-removing member 31. A first motor is fixedly connected to the side wall of the sliding member 34 near the slag-removing member 31. The output end of the first motor is fixedly connected to the slag-removing member 31. A heat insulation sleeve is provided on the outside of the first motor to prevent the high temperature inside the induction furnace 1 from affecting the first motor.

[0030] Please see Figure 1 and Figure 2As shown, the bottom of the induction furnace 1 is provided with a base 11, a first support frame 12 is fixedly connected to the base 11, a second support frame 13 is rotatably connected to the first support frame 12, a support rod 14 is slidably connected inside the second support frame 13, and the mounting part 32 is rotatably connected to the top of the support rod 14.

[0031] Please see Figure 1 and Figure 2 As shown, a second motor is fixedly connected to the top of the support rod 14 away from the mounting part 32, and the output end of the second motor is fixedly connected to the mounting part 32. A third motor is fixedly connected to one end of the first support frame 12, and the output end of the third motor is fixedly connected to the second support frame 13.

[0032] Please see Figure 6 As shown, a first through hole is provided at one end of the hydraulic cylinder 23, and a second through hole is provided on the side wall of the mounting cylinder 33. The first and second through holes are connected by a hose. The second through hole is connected to an external hydraulic source through a hose. A third through hole is provided on the side wall of the second support frame 13. The third through hole is connected to an external hydraulic source through a hose. The hose is made of high temperature resistant material. A seal is provided at the connection between the hose and the first, second, and third through holes. This is existing technology and will not be described in detail here.

[0033] Please see Figure 6 As shown, when the electric locking plate is energized, the sliding member 34 can slide inside the mounting cylinder 33 by the attraction force of the electric locking plate. The sliding member 34 and the mounting cylinder 33 can rotate relative to each other. The slag removal member 31 has multiple screen holes for the flow of molten material. The attraction force of the electric locking plate on the sliding member 34 is much greater than the pulling force of the elastic member 35 on the sliding member 34. This is the prior art and will not be elaborated on here.

[0034] Please see Figure 1 As shown, support holes are provided on both sides of the induction furnace 1. The first support frame 12 is rotatably connected to the induction furnace 1 through the support holes. A rotating shaft is fixedly connected inside the first support frame 12. The rotating shaft passes through the second support frame 13 and extends into the support hole. After melting is completed, the molten manganese steel can be poured out of the induction furnace 1 by rotating the induction furnace 1. The rotation method of the induction furnace 1 is based on existing technology and is not limited here.

[0035] When using, such as Figure 7As shown, when slag removal is not required, the third motor drives the second support frame 13 to rotate, thereby moving the slag removal component 31 and the mounting cylinder 33 away from the upper end of the induction furnace 1, preventing the first slag removal assembly 2 and the second slag removal assembly 3 from being affected by the continuous high temperature above the induction furnace 1. When slag removal is required, the third motor drives the second support frame 13 to rotate, thereby positioning the slag removal component 31 at the upper end of the induction furnace 1. Liquid is drawn out from the third through hole of the second support frame 13 by an external hydraulic source, causing the support rod 14 to descend. Liquid is then introduced into the hydraulic cylinder 23 through a hose by an external hydraulic source, thereby causing the electric push rod 24 to move away from the mounting cylinder 3. The guide plate 21 slides in the direction of 3, causing it to slide away from the mounting cylinder 33, so that the maximum distance between the two guide plates 21 is consistent with the diameter of the furnace opening. The electric actuator 24 controls the guide plate 21 to move closer to the induction furnace 1. When the guide groove 22 on the guide plate 21 is submerged in the molten metal inside the induction furnace 1, the second motor is activated, causing the mounting component 32 to rotate, thus rotating the guide plate 21. The rotation of the guide plate 21 scrapes away the slag from the inner wall of the furnace opening of the induction furnace 1, causing the slag adhering to the inner wall of the furnace opening to detach. The slag is then removed through the guide plate 21 and the guide groove 22. 2. The guide plate 21 rotates inside the induction furnace 1, and the guide plate 21 is arc-shaped, causing the molten slag inside the induction furnace 1 to accumulate towards the center of the induction furnace 1 along the guide plate 21. After all the molten slag adhering to the inner wall of the furnace opening is scraped off, the liquid inside the hydraulic cylinder 23 is extracted by the external hydraulic source, causing the guide plate 21 to slide towards the mounting cylinder 33, thereby pushing the molten slag to accumulate towards the center of the induction furnace 1. When the guide plate 21 moves to its limit position, the second motor is turned off, and the electric push rod 24 is controlled to move the guide plate 21 away from the induction furnace 1. The liquid is then introduced into the hydraulic cylinder 23 through the hose by the external hydraulic source. This causes the guide plate 21 to slide away from the mounting cylinder 33. At the same time, the first motor of the sliding component 34 is activated to drive the slag scraper 31 to rotate and enter the induction furnace 1. When the slag scraper 31 is at the bottom of the slag, the liquid is brought into the second support frame 13 through the third through hole by the external hydraulic source. This causes the support rod 14 to drive the slag scraper 31 to rise and scrape the slag out. The guide plate 21 scrapes away the molten slag adhering to the inner wall of the induction furnace 1 and pushes the slag to gather in the middle of the induction furnace 1. The slag is then scraped out by the slag scraper 31, thus preventing the slag from solidifying and adhering to the furnace wall, which would result in incomplete removal of the oxide slag. Example 2

[0036] In actual use, it was found that some molten steel was carried out with the slag during slag removal. If the accumulated slag was too large, a large amount of molten steel would inevitably be carried out during slag removal before tapping, resulting in the loss of finished molten steel. Further improvements were made based on the above embodiments.

[0037] Based on the above embodiments, during use, when the guide plate 21 pushes the molten slag towards the center of the induction furnace 1 during the slag removal process, the second motor is turned off. The guide plate 21 is moved away from the induction furnace 1 by controlling the electric push rod 24. Liquid is introduced into the hydraulic cylinder 23 through a hose via an external hydraulic source, causing the guide plate 21 to slide away from the mounting cylinder 33. Simultaneously, the electric locking plate is energized, causing the sliding member 34 to slide towards the electric locking plate inside the mounting cylinder 33, thus stretching the elastic member 35. When the sliding member 34 slides to contact the electric locking plate, the first motor is started, causing the slag removal member 31 to rotate and enter the induction furnace 1. When the slag removal member 31 is at the bottom of the slag, it is moved away from the induction furnace 1 by an external hydraulic source. The hydraulic source allows liquid to enter the second support frame 13 through the third through hole, which causes the support rod 14 to drive the slag-scraping component 31 to rise and scrape off the slag. When the slag-scraping component 31 is completely separated from the molten steel, the electric locking plate is de-energized, which causes the elastic component 35 to contract and reciprocate. This causes the sliding component 34 to slide back and forth inside the mounting cylinder 33 under the action of the elastic component 35, so that the molten steel carried out by the slag-scraping component 31 is shaken off and flows into the induction furnace 1 through the screen holes. Since the slag is solid and can solidify and adhere, the slag will not enter the induction furnace 1 through the screen holes. By causing the sliding component 34 to slide back and forth inside the mounting cylinder 33 under the action of the elastic component 35 during the slag-scraping process, the slag-scraping component 31 shakes off the molten steel carried out during slag scraping, preventing the loss of finished molten steel.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A medium-frequency induction furnace for smelting manganese steel, comprising an induction furnace, characterized in that, Also includes: The first slag removal assembly includes a guide plate disposed at the upper end of the induction furnace, the guide plate being capable of scraping slag off the side wall of the induction furnace opening; The second slag removal assembly includes a slag removal component disposed at the upper end of the induction furnace, which can scoop out slag from inside the induction furnace by rotating. The guide plate can guide the flow of molten material in the furnace, causing the slag to gather in the middle of the induction furnace. During the process of shoveling out the slag, the molten steel brought out during the slag removal process can be shaken off through reciprocating motion.

2. The medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: The guide plates are at least two in number and are arranged symmetrically at the center. The side walls of the guide plates are provided with guide grooves, which can guide the molten material during the process of the guide plates scraping off the slag.

3. The medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: The upper end of the induction furnace is provided with an installation component, one end of which is provided with an installation cylinder. A hydraulic cylinder is fixedly connected to the side wall of the installation cylinder. A piston rod is slidably connected inside the hydraulic cylinder. One end of the piston rod is fixedly connected to an electric actuator. The output end of the electric actuator is fixedly connected to a guide plate.

4. The medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: The mounting cylinder has a sliding component slidably connected inside, and an elastic component is provided inside the mounting cylinder. One end of the elastic component is fixedly connected to the inner wall of the mounting cylinder, and the other end of the elastic component is fixedly connected to the sliding component. An electric locking plate is fixedly connected to one end of the mounting cylinder, and the electric locking plate is magnetically connected to the sliding component.

5. A medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: One end of the sliding member passes through the mounting cylinder and is rotatably connected to the slag-removing member. A first motor is fixedly connected to the side wall of the sliding member near the slag-removing member, and the output end of the first motor is fixedly connected to the slag-removing member.

6. A medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: The bottom of the induction furnace is provided with a base, and a first support frame is fixedly connected to the base. A second support frame is rotatably connected to the first support frame, and a support rod is slidably connected inside the second support frame. The mounting component is located on the top of the support rod.

7. A medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: A second motor is fixedly connected to one end of the support rod away from the mounting component. The output end of the second motor passes through the support rod and is fixedly connected to the mounting component. A third motor is fixedly connected to one end of the first support frame. The output end of the third motor is fixedly connected to the second support frame.

8. A medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: One end of the hydraulic cylinder has a first through hole, and the side wall of the mounting cylinder has a second through hole. The first through hole and the second through hole are connected. The second through hole is connected to an external hydraulic source. The side wall of the second support frame has a third through hole, and the third through hole is connected to an external hydraulic source.

9. A medium-frequency induction furnace for manganese steel smelting according to claim 8, characterized in that: When the electric locking plate is energized, the sliding member can slide inside the mounting cylinder by the attraction force of the electric locking plate, and the slag removal member has multiple sieve holes for the flow of molten material.

10. A medium-frequency induction furnace for manganese steel smelting according to claim 1, characterized in that: The induction furnace has support holes on both sides, and the first support frame is rotatably connected to the induction furnace through the support holes.

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