A refining furnace and an emergency treatment method for power failure of the refining furnace

Abstract

This invention discloses a refining furnace and an emergency handling method for power outages in the refining furnace. The refining furnace includes electrodes, a furnace cover, a ladle, and a rotary table. The ladle is placed on the rotary table, the furnace cover is placed on the ladle, and the electrodes extend into the ladle. It also includes an electrode lifting device, which comprises a conductive horizontal arm, a lifting hydraulic cylinder, and a lifting guide frame. The conductive horizontal arm is slidably connected to the lifting guide frame, and the lifting hydraulic cylinder is fixed inside the lifting guide frame and connected to the conductive horizontal arm. The electrodes are placed on the conductive horizontal arm, and a first pull rope is connected to the conductive horizontal arm. A first fixed pulley is provided on the lifting guide frame. The first pull rope extends downwards after passing over the first fixed pulley and is connected to a counterweight. The weight of the counterweight is greater than the total weight of the electrodes and the conductive horizontal arm. In the event of a sudden power outage, the refining furnace of this invention uses the counterweight's own weight to pull the electrodes upwards, detaching them from the molten ferromanganese alloy in the ladle and preventing the electrodes from burning or sticking due to prolonged immersion in the molten ferromanganese alloy.

Description

Technical Field

[0001] This invention relates to the field of smelting equipment technology, specifically to a refining furnace and an emergency handling method for power outages of the refining furnace. Background Technology

[0002] In the smelting of ferromanganese alloys, the refining furnace is the core equipment for purifying and regulating the temperature of the molten ferromanganese alloy. Existing refining furnaces typically include electrodes, a furnace lid, a ladle, and a rotary table. The ladle is placed on the rotary table, and the furnace lid is placed over the ladle to reduce heat loss and oxidation of the molten ferromanganese alloy. The electrodes can be raised and lowered into the molten ferromanganese alloy inside the ladle and are electrically connected to an external power supply. The high temperature generated by electrode discharge enables the refining of the molten ferromanganese alloy.

[0003] Currently, most refining furnace electrode lifting devices on the market adopt a single hydraulic cylinder drive structure. This means the hydraulic cylinder directly drives the conductive crossarm and electrode to adjust the depth of the electrode immersed in the molten ferromanganese alloy. However, in the event of a sudden power outage, the hydraulic station immediately loses power and stops working. The hydraulic cylinder rapidly depressurizes and loses its support and driving function for the conductive crossarm. At this time, the electrode cannot automatically lift or lower and will remain submerged in the high-temperature molten ferromanganese alloy for an extended period. Prolonged contact between the electrode and the high-temperature molten ferromanganese alloy makes it highly susceptible to burning and adhesion. This not only leads to excessively rapid electrode wear and increased production costs, but also risks causing molten ferromanganese alloy to splash during subsequent power restoration, resulting in equipment damage and personnel safety hazards. Furthermore, electrode debris falling into the molten ferromanganese alloy can contaminate its composition, affecting the refining quality of the molten ferromanganese alloy. Summary of the Invention

[0004] The main objective of this invention is to overcome the deficiencies of the prior art and provide a refining furnace and a method for emergency handling of power outages in the refining furnace, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention proposes a refining furnace comprising an electrode, a furnace cover, a ladle, and a rotary worktable. The ladle is disposed on the rotary worktable, the furnace cover covers the ladle, the electrode extends into the ladle via a lifting mechanism, and the electrode is electrically connected to an external power supply. The furnace also includes an electrode lifting device, on which the electrode is mounted. The electrode lifting device comprises a conductive horizontal arm, a lifting hydraulic cylinder, and a lifting guide frame. One end of the conductive horizontal arm is slidably connected to the lifting guide frame. The cylinder body of the lifting hydraulic cylinder is fixed to the top end within the lifting guide frame, and the extended end of the lifting hydraulic cylinder is connected to the conductive horizontal arm. The lifting hydraulic cylinder is connected to an external hydraulic station. The electrode is fixedly disposed at the other end of the conductive horizontal arm. A first pull rope is fixedly connected to the middle of the conductive horizontal arm. A first fixed pulley is provided at the top end of the lifting guide frame. The first pull rope extends downwards after passing over the first fixed pulley and is connected to a counterweight. The weight of the counterweight is greater than the total weight of the electrode and the conductive horizontal arm.

[0006] To further optimize the technical solution, the bottom of the lifting guide frame is provided with a buffer device corresponding to the counterweight. The buffer device includes a support plate, a first spring and a damper. The bottom ends of the first spring and the damper are respectively fixedly connected to the bottom of the lifting guide frame, and the top ends of the first spring and the damper are respectively fixedly connected to the bottom surface of the support plate.

[0007] To further optimize the technical solution, the counterweight is provided with first sliding grooves on both sides, and the lifting guide frame is provided with a first guide rail corresponding to the first sliding groove.

[0008] To further optimize the technical solution, a plurality of first guide rollers are provided in the first sliding groove, and the roller surfaces of the plurality of first guide rollers are in rolling connection with the rail surface of the first guide rail.

[0009] To further optimize the technical solution, a sliding seat is fixedly provided at one end of the conductive cross arm, and a second sliding groove is provided on both sides of the sliding seat. A second guide rail corresponding to the second sliding groove is vertically provided on the lifting guide frame.

[0010] To further optimize the technical solution, a plurality of second guide rollers are provided in the second sliding groove, and the roller surfaces of the plurality of second guide rollers are in rolling connection with the rail surface of the second guide rail.

[0011] Further optimization of the technical solution also includes a high-level silo for storing thermal insulation agent. The bottom outlet of the high-level silo is connected to the sprinkling hole on the furnace cover through the main feed pipe. The main feed pipe is equipped with a normally open solenoid valve.

[0012] To further optimize the technical solution, a hollow material distribution cone is provided above the furnace cover. The main feed pipe is connected to the feed inlet at the top of the material distribution cone. Several material spreading holes are evenly distributed. Several material outlet holes corresponding to the material spreading holes are opened along the inner cone surface of the material distribution cone. The material outlet holes and the material spreading holes are connected by a material distribution pipe.

[0013] To further optimize the technical solution, a gate is movably mounted on the furnace cover, and several material passage holes corresponding to the material spreading holes are opened on the gate. The material distribution pipe is connected to one end of the material passage holes. A second fixed pulley is provided on one side wall of the furnace cover. A second pull rope is fixedly connected to one side of the gate. The second pull rope passes around the second fixed pulley and extends upward to be fixedly connected to the conductive cross arm. A mounting seat is provided on the symmetrical side of the furnace cover and the second fixed pulley. A second spring is provided on the mounting seat. The second spring is fixedly connected to the edge of the gate. A locking block is fixedly provided on the furnace cover. An elongated hole is opened on the gate, and the locking block extends into the elongated hole.

[0014] This invention also proposes an emergency handling method for power outages in refining furnaces, wherein the refining furnace is the aforementioned refining furnace, comprising the following steps: S1. After a municipal power outage, the lifting hydraulic cylinder is depressurized and loses its downward support function for the conductive cross arm. Since the weight of the counterweight is greater than the total weight of the electrode and the conductive cross arm, the counterweight sinks downward under its own weight. It passes through the first pull rope and around the first fixed pulley, pulling the conductive cross arm upward along the lifting guide frame in the opposite direction. The electrode moves upward synchronously until the electrode is completely separated from the molten manganese-iron alloy in the ladle. S2. During the downward movement of the counterweight along the lifting guide frame, the first sliding grooves on both sides of the counterweight cooperate with the first guide rail on the lifting guide frame. Combined with the first guide roller in the first sliding groove, the counterweight is guided to move smoothly without swaying or jamming. When the counterweight reaches the bottom of the lifting guide frame, it contacts the support plate of the buffer device. Under the action of the first spring and the damper, the support plate absorbs the impact force of the counterweight moving downward, preventing the counterweight from directly colliding with the bottom of the lifting guide frame. S3. The normally open solenoid valve on the main feed pipe connecting the bottom discharge port of the high-level silo will automatically open after power failure. The heat preservation agent in the high-level material enters the cone top of the distribution cone, disperses to the surroundings, and enters the ladle through the discharge hole-distribution pipe-spreading hole. It evenly covers the upper surface of the molten manganese-iron alloy to form a heat preservation and isolation layer, preventing the molten manganese-iron alloy from oxidizing and avoiding a rapid drop in the temperature of the molten manganese-iron alloy. S4. After the conductive cross arm moves to the top, pull the second pull rope. The second pull rope goes around the second fixed pulley to change the direction of force, and drives the gate to move horizontally along the surface of the furnace cover. The material passage on the gate is aligned with the material sprinkling hole on the furnace cover to ensure that the material sprinkling action is carried out after the electrode has risen to the position. S5. After power is restored, start the external hydraulic station to control the extension end of the lifting hydraulic cylinder to descend, pushing the conductive cross arm to slide down along the lifting guide frame. The conductive cross arm drives the electrode to descend synchronously until the electrode reaches the preset position required for refining. During the descent of the conductive cross arm, release the second pull rope, reset the second spring, pull the gate to move in the opposite direction, so that the material passage on the gate is misaligned with the material spreading hole on the furnace cover, close the heat preservation agent distribution channel, and close the main feed pipe after the normally open solenoid valve is energized, and the refining furnace resumes normal production process.

[0015] The beneficial effects of this invention include: when a sudden municipal power outage occurs, the external power supply is interrupted, the hydraulic station connected to the lifting hydraulic cylinder loses power and stops working, the lifting hydraulic cylinder depressurizes, and loses its downward support function for the conductive cross arm. Since the weight of the counterweight is greater than the total weight of the electrode and the conductive cross arm, the counterweight sinks downward along the lifting guide frame under its own gravity. Through the first pull rope, the conductive cross arm is pulled upward smoothly along the lifting guide frame. The electrode moves upward synchronously with the conductive cross arm until the electrode is completely separated from the molten manganese-iron alloy in the ladle. This avoids the electrode from being burned or stuck due to being buried in the molten manganese-iron alloy for a long time. At the same time, it prevents the electrode tip from being eroded and melted by the molten manganese-iron alloy, which would lead to excessive wear and increased production costs. It also avoids the safety hazard caused by the molten manganese-iron alloy splashing when the electrode is reset after power is restored, after the electrode has stuck to the molten manganese-iron alloy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall refining furnace in this invention.

[0017] Figure 2 This is a schematic diagram showing the connection between the counterweight, sliding seat, and lifting guide frame in this invention.

[0018] Figure 3 This is a schematic diagram showing the connection between the high-level silo, the gate, and the furnace cover of the present invention.

[0019] Figure 4 This is a schematic diagram of the bottom of the material distribution cone of the present invention.

[0020] Figure 5 This is a schematic diagram of the assembly of the furnace cover and the gate of the present invention. Reference numerals: 1. Electrode; 2. Furnace cover; 201. Locking block; 3. Ladle; 4. Rotary worktable; 5. Electrode lifting device; 501. Conductive cross arm; 502. Lifting hydraulic cylinder; 503. Lifting guide frame; 504. First pull rope; 505. First fixed pulley; 506. Counterweight; 507. First sliding groove; 508. First guide rail; 509. First guide roller; 510. Sliding seat; 511. Second sliding groove; 512. Second guide rail; 513. Second guide roller; 6. Buffer device; 601. Support Plate; 602 First spring; 603 Damper; 7 High-level hopper; 8 Main feed pipe; 9 Normally open solenoid valve; 10 Distribution cone; 1001 Discharge hole; 1002 Cone top feed inlet; 11 Distribution pipe; 12 Gate; 1201 Through hole; 1202 Long strip hole; 13 Second fixed pulley; 14 One end of through hole 1201 is connected to a second fixed pulley 13 on one side wall of furnace cover 2, and a second pull rope is fixedly connected to one side of gate 12; 15 Mounting base; 16 Second spring. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not 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.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified. Example 1

[0025] Please see Figures 1 to 5The refining furnace disclosed in this embodiment includes an electrode 1, a furnace cover 2, a ladle 3, and a rotary table 4. The ladle 3 is mounted on the rotary table 4, and the furnace cover 2 is movably positioned directly above the ladle 3. The electrode 1 can be raised and lowered to extend into the ladle 3. The electrode 1 is electrically connected to an external power supply. The refining furnace also includes an electrode lifting device 5. The electrode 1 is mounted on the electrode lifting device 5, and the electrode 1 is raised and lowered by the electrode lifting device 5, extending into or rising from the ladle 3 to detach from the molten ferromanganese alloy. The electrode lifting device 5 includes a conductive horizontal arm 501, a lifting hydraulic cylinder 502, and a lifting guide frame 503. One end of the conductive horizontal arm 501 is slidably connected to the lifting guide frame 503. The cylinder body of 02 is fixed at the top of the lifting guide frame 503. The extended end of the lifting hydraulic cylinder 502 is connected to the conductive cross arm 501. The lifting hydraulic cylinder 502 is connected to an external hydraulic station. Electrode 1 is fixed at the other end (cantilever end) of the conductive cross arm 501. A first pull rope 504 is fixedly connected to the middle of the conductive cross arm 501. Two sets of first fixed pulleys 505 are provided at the top of the lifting guide frame 503. The first pull rope 504 extends downward after passing over the two sets of first fixed pulleys 505 and is connected to a counterweight 506. The weight of the counterweight 506 is greater than the total weight of electrode 1 and conductive cross arm 501. Specifically, electrode 1, ladle 3, and rotary table 4 are all existing technology products and will not be described in detail here. Electrode 1 The counterweight 506 extends through the furnace cover 2 into the ladle 3. First sliding grooves 507 are provided on both sides of the counterweight 506. A first guide rail 508, corresponding to the first sliding grooves 507, is vertically provided on the lifting guide frame 503. The counterweight 506 is connected to the first guide rail 508 through the first sliding grooves 507, which guides and limits the movement of the counterweight 506, ensuring stable vertical lifting and lowering only. This effectively prevents the counterweight 506 from swaying, shaking, or jamming during descent, ensuring reliable transmission and smooth operation. Similarly, a sliding seat 510 is fixed at one end of the conductive crossarm 501. Second sliding grooves 511 are provided on both sides of the sliding seat 510. The guide frame 503 is vertically provided with a second guide rail 512 corresponding to the second sliding groove 511. The second sliding groove 511 and the second guide rail 512 slide together to precisely guide and limit the lifting and lowering movement of the conductive cross arm 501, ensuring that the conductive cross arm 501 rises and falls smoothly in the vertical direction, avoiding swaying, jamming or shaking during the lifting process, and ensuring that the lifting action of the electrode 1 is stable and reliable. In this embodiment, under normal production conditions, the electrode 1 is driven by the lifting hydraulic cylinder 502 to overcome the gravity of the counterweight 506 and drive the conductive cross arm 501 to descend, thereby driving the electrode 1 to descend synchronously, so that the electrode 1 passes through the furnace cover 2 and extends into the molten manganese-iron alloy in the ladle 3 to meet the refining operation requirements.When a sudden municipal power outage occurs, the external power supply is interrupted, and the hydraulic station connected to the lifting hydraulic cylinder 502 loses power and stops working. The lifting hydraulic cylinder 502 depressurizes and loses its downward support function for the conductive cross arm 501. Since the weight of the counterweight 506 is greater than the total weight of the electrode 1 and the conductive cross arm 501, the counterweight 506 sinks downward along the lifting guide frame 503 under its own weight. It passes through the first pull rope 504 fixed in the middle of the conductive cross arm 501 and goes around the two sets of first fixed pulleys 5 at the top of the lifting guide frame 503. 05. Change the direction of force and pull the conductive cross arm 501 upward smoothly along the lifting guide frame 503. Electrode 1 moves upward synchronously with the conductive cross arm 501 until electrode 1 is completely detached from the molten manganese-iron alloy in the ladle 3. This prevents electrode 1 from being burned or stuck due to prolonged immersion in the molten manganese-iron alloy, and also prevents the end of electrode 1 from being eroded and melted by the molten manganese-iron alloy, resulting in excessive wear and increased production costs. It also prevents electrode 1 from sticking to the molten manganese-iron alloy and causing the molten manganese-iron alloy to splash during subsequent power-on reset, which could lead to safety hazards.

[0026] In a preferred embodiment, a buffer device 6 corresponding to the counterweight 506 is provided at the bottom of the lifting guide frame 503. The buffer device 6 includes a support plate 601, a first spring 602, and a damper 603. The bottom ends of the first spring 602 and the damper 603 are fixedly connected to the bottom of the lifting guide frame 503, and the top ends of the first spring 602 and the damper 603 are fixedly connected to the bottom surface of the support plate 601. By setting the buffer device 6 to provide flexible support and buffer for the falling counterweight 506, the impact and vibration generated when the counterweight 506 falls are effectively absorbed, avoiding rigid collision between the counterweight 506 and the bottom of the lifting guide frame 503, protecting the lifting guide frame 503, extending the service life of the equipment, ensuring that the counterweight 506 and the conductive cross arm 501 operate smoothly and reliably, and enabling the electrode 1 to rise stably and quickly and completely detach from the molten manganese-iron alloy.

[0027] In a preferred embodiment, a plurality of first guide rollers 509 are provided in the first sliding groove 507, and the roller surfaces of the plurality of first guide rollers 509 are in rolling connection with the rail surface of the first guide rail 508; similarly, a plurality of second guide rollers 513 are provided in the second sliding groove 511, and the roller surfaces of the plurality of second guide rollers 513 are in rolling connection with the rail surface of the second guide rail 512; by converting the sliding friction of the counterweight 506, the sliding seat 510 and the lifting guide frame 503 into rolling friction, the frictional resistance of the counterweight 506 and the sliding seat 510 during the lifting process is greatly reduced, avoiding jamming, stuttering, swaying or abnormal noise, making the lifting of the counterweight 506 and the conductive cross arm 501 smoother, more stable and responsive, further ensuring that the electrode 1 can rise quickly and reliably and completely detach from the molten manganese-iron alloy. Example 2

[0028] Please continue reading. Figures 1 to 5To prevent external air from entering the molten manganese-iron alloy inside the ladle 3 after a sudden power outage, and to reduce the rapid drop in temperature of the molten manganese-iron alloy, this embodiment adds a high-level silo 7 based on embodiment 1. The heat-insulating agent stored in the high-level silo 7 can enter the ladle 3 after a power outage and cover the surface of the molten manganese-iron alloy to form a sealing layer. Specifically, the refining furnace also includes a high-level silo 7 for storing insulating agent. The high-level silo 7 can be fixedly installed on the top of the workshop. The insulating agent stored in the high-level silo 7 is an existing ladle-specific covering agent, preferably in granular or powder form. It has a low thermal conductivity, which can effectively reduce the temperature loss of ferromanganese alloy melt, quickly isolate air, prevent secondary oxidation of ferromanganese alloy melt, and adsorb impurities on the surface of ferromanganese alloy melt, thus purifying the ferromanganese alloy melt. The bottom outlet of the high-level silo 7 is connected to the sprinkling hole (not shown in the figure) on the furnace cover 2 through the main feed pipe 8. The main feed pipe 8 is equipped with a normally open solenoid valve 9. After a power failure, the normally open solenoid valve 9 automatically opens in the power-off state, and the insulating agent in the high-level silo 7 enters the ladle along the main feed pipe 8 and the sprinkling hole. To ensure that the insulating agent is evenly and without dead angles applied to the upper surface of the molten manganese-iron alloy inside the ladle 3, a hollow material distribution cone 10 is provided directly above the furnace cover 2. The main feed pipe 8 is connected to the feed inlet 1002 at the top of the cone of the material distribution cone 10. Several material spreading holes are evenly distributed and penetrate through the furnace cover 2 into the ladle 3. Several discharge holes 1001 corresponding to the material spreading holes are opened along the inner cone surface of the material distribution cone 10. The discharge holes 1001 and the material spreading holes are connected by a material distribution pipe 11.When the normally open solenoid valve 9 automatically opens in the absence of power, the insulating agent naturally disperses along the inner conical surface of the distribution cone 10 under its own gravity. It is then transported to each sprinkling hole through several corresponding discharge holes 1001 and the distribution pipe 11. The sprinkling holes are evenly distributed to achieve full coverage of the insulating agent on the surface of the molten manganese-iron alloy without any dead corners. To prevent the insulating agent from entering the ladle 3 during the ascent of the electrode 1, which would create dead corners, a gate 12 is horizontally movable on the furnace cover 2. Several openings are provided on the gate 12. A material passage hole 1201 corresponds to the material feeding hole. The lower end of the material distribution pipe 11 is connected to the material passage hole 1201. The material distribution pipe 11 is made of high-temperature resistant metal flexible hose. A second fixed pulley 13 is provided on one side wall of the furnace cover 2. A second pull rope 14 is fixedly connected to one side of the gate plate 12. The second pull rope 14 passes around the second fixed pulley 13 and extends upward to be fixedly connected to the conductive cross arm 501. A mounting seat 15 is provided on the symmetrical side of the furnace cover 2 and the second fixed pulley 13. A second spring 16 is provided on the mounting seat 15. Spring 16 is a tension spring. One end of the second spring 16 is fixedly connected to the edge of the gate plate 12, and the other end is fixedly connected to the mounting base 15. A locking block 201 is fixedly provided on the furnace cover 2. An elongated hole 1202 is provided on the gate plate 12. The locking block 201 extends into the elongated hole 1202. The gate plate 12 is precisely guided by the locking block 201 on the furnace cover 2 through the elongated hole 1202. After the power is cut off, electrode 1 moves upward with the conductive cross arm 501, and simultaneously pulls the second pull rope 14. The second pull rope 14 is reserved to a certain length. When the conductive cross arm 501 is about to rise to the top, the second pull rope 14 changes the direction of force through the second fixed pulley 13 and drives the gate 12 to move horizontally, so that the material passage hole 1201 is precisely aligned with the material spreading hole. At this time, the heat preservation agent can enter the ladle 3 through the material distribution pipe 11, the material passage hole 1201 and the material spreading hole, completely eliminating the problem of uneven coverage and dead corners caused by material spreading during the rise of electrode 1, and ensuring that the heat preservation agent is evenly spread only when the manganese-iron alloy melt is unobstructed. Example 3

[0029] Please continue reading. Figures 1 to 5This embodiment discloses an emergency handling method for a refining furnace power outage. The refining furnace is the aforementioned refining furnace. The method includes the following steps: S1. After a municipal power outage, the hydraulic station connected to the lifting hydraulic cylinder 502 loses power simultaneously. The lifting hydraulic cylinder 502 depressurizes and loses its downward support function for the conductive cross arm 501. Since the weight of the counterweight 506 is greater than the total weight of the electrode 1 and the conductive cross arm 501, the counterweight 506 sinks downward under its own weight. Through the first pull rope 504 passing over the first fixed pulley 505, it pulls the conductive cross arm 501 upward along the lifting guide frame 503, and the electrode 1 moves upward simultaneously. Until electrode 1 is completely detached from the molten manganese-iron alloy in ladle 3; the entire process requires no manual intervention or backup power, relying solely on the equipment's own counterweight balance structure to automatically lift the electrode, with rapid response and reliable operation. This completely avoids electrode 1 from burning or sticking due to prolonged immersion in the high-temperature molten manganese-iron alloy, while also preventing the tip of electrode 1 from being eroded and melted by the molten manganese-iron alloy, leading to excessive wear, increased production costs, and electrode 1 breaking and falling into the molten manganese-iron alloy, thus contaminating the molten manganese-iron alloy. It also prevents the electrode from sticking to the molten manganese-iron alloy and causing the molten manganese-iron alloy to splash during subsequent power reset, thus effectively protecting electrode 1. S2. During the downward movement of the counterweight 506 along the lifting guide frame 503, the first sliding grooves 507 on both sides of the counterweight 506 cooperate with the first guide rails 508 on the lifting guide frame 503. Combined with the rolling guidance of the first guide rollers 509 in the first sliding grooves 507, the counterweight 506 moves smoothly downward without swaying or jamming. When the counterweight 506 reaches the bottom of the lifting guide frame 503, it contacts the support plate 601 of the buffer device 6. Under the action of the first spring 602 and the damper 603, the support plate 601 absorbs the impact force of the counterweight 506 moving downward, preventing the counterweight 506 from directly colliding with the bottom of the lifting guide frame 503. This ensures that the downward movement of the counterweight 506 is smooth and reliable, preventing the electrode 1 from being lifted incompletely or vibrating during the lifting process due to swaying or jamming of the counterweight 506. At the same time, it protects the lifting guide frame 503, the counterweight 506, and the first pull rope 504 and other related transmission components from damage, extending the overall service life of the equipment and further ensuring the stability and safety of the electrode 1 lifting process.S3. The normally open solenoid valve 9 on the main feed pipe 8, which connects to the bottom outlet of the high-level silo 7, automatically opens after power failure. The insulating agent in the high-level silo, under its own gravity, enters the top feed port 1002 of the distribution cone 10 through the main feed pipe 8 and falls to the top of the distribution cone 10. The insulating agent naturally disperses along the inner cone surface of the distribution cone 10 and flows into each distribution pipe 11 through the outlet 1001. Finally, it is evenly sprinkled into the ladle 3 through the sprinkling holes on the furnace cover 2, evenly covering the upper surface of the ferromanganese alloy melt to form a heat insulation layer, preventing the ferromanganese alloy melt from oxidizing and avoiding a rapid drop in temperature. It also prevents secondary oxidation of the ferromanganese alloy melt. The insulating agent can be automatically distributed without additional power, which is suitable for power outage emergency scenarios. Moreover, the distribution cone 10 can ensure that the insulating agent is evenly distributed and avoids dead corners. S4. After the conductive cross arm 501 rises to the top, the second pull rope 14 is pulled. The second pull rope 14 passes around the second fixed pulley 13 to change the direction of force, driving the gate plate 12 to move horizontally along the surface of the furnace cover 2. During this process, the second spring 16 on the mounting seat 15 on the symmetrical side of the furnace cover 2 is stretched synchronously, always forming a stable reverse buffer pull on the gate plate 12 until the material passage hole 1201 on the gate plate 12 is precisely aligned with the material sprinkling hole on the furnace cover 2. This ensures that the heat preservation agent can only enter the ladle 3 through the material distribution pipe 11, the material passage hole 1201 and the material sprinkling hole after the electrode 1 has fully risen to the position and the molten manganese-iron alloy is unobstructed. Through the linkage between the conductive cross arm 501 and the gate plate 12, the sprinkling sequence is precisely controlled, completely eliminating problems such as uneven coverage and dead corners caused by the premature feeding of the heat preservation agent during the rising of the electrode 1, and further improving the heat preservation and anti-oxidation effect. S5. After power is restored, first inspect the external power supply facilities, hydraulic station, and normally open solenoid valve 9 to confirm that there are no abnormalities. Then, start the external hydraulic station to control the extended end of the lifting hydraulic cylinder 502 to descend. This overcomes the gravity of the counterweight 506 and pushes the conductive cross arm 501 to slide smoothly downward along the lifting guide frame 503. The conductive cross arm 501 drives the electrode 1 to descend synchronously until the electrode 1 reaches the preset position required for refining. At the same time, the guide... During the downward movement of the electric horizontal arm 501, the second pull rope 14 is released, and the second spring 16 resets under its own elastic force, pulling the gate plate 12 to move horizontally in the opposite direction. This causes the material passage hole 1201 on the gate plate 12 to be misaligned with the material dispensing hole on the furnace cover 2, closing the insulation agent distribution channel. After the normally open solenoid valve 9 is energized, the main feed pipe 8 is closed, stopping the supply of insulation agent, and the refining furnace resumes normal production. The entire recovery process does not require complex manual operation, adapts to the needs of continuous production, can quickly restore refining operations, and reduces the impact of power outages on production progress.

[0030] The above description provides a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A refining furnace, comprising electrodes, a furnace cover, a ladle, and a rotary table, wherein the ladle is disposed on the rotary table, the furnace cover covers the ladle, the electrodes extend into the ladle via a lifting mechanism, and the electrodes are electrically connected to an external power supply facility, characterized in that: It also includes an electrode lifting device, on which the electrode is mounted. The electrode lifting device includes a conductive cross arm, a lifting hydraulic cylinder, and a lifting guide frame. One end of the conductive cross arm is slidably connected to the lifting guide frame. The cylinder body of the lifting hydraulic cylinder is fixed to the top end inside the lifting guide frame. The extended end of the lifting hydraulic cylinder is connected to the conductive cross arm and is connected to an external hydraulic station. The electrode is fixedly mounted on the other end of the conductive cross arm. A first pull rope is fixedly connected to the middle of the conductive cross arm. A first fixed pulley is provided at the top of the lifting guide frame. The first pull rope extends downward after passing over the first fixed pulley and is connected to a counterweight. The weight of the counterweight is greater than the total weight of the electrode and the conductive cross arm.

2. The refining furnace as described in claim 1, characterized in that: The bottom of the lifting guide frame is provided with a buffer device corresponding to the counterweight. The buffer device includes a support plate, a first spring and a damper. The bottom ends of the first spring and the damper are fixedly connected to the bottom of the lifting guide frame, and the top ends of the first spring and the damper are fixedly connected to the bottom surface of the support plate.

3. The refining furnace as described in claim 2, characterized in that: The counterweight has a first sliding groove on each side, and the lifting guide frame has a first guide rail corresponding to the first sliding groove.

4. The refining furnace as described in claim 3, characterized in that: The first sliding groove is provided with a plurality of first guide rollers, and the roller surfaces of the plurality of first guide rollers are in rolling connection with the rail surface of the first guide rail.

5. The refining furnace as described in claim 4, characterized in that: One end of the conductive cross arm is fixedly provided with a sliding seat, and the two sides of the sliding seat are respectively provided with second sliding grooves. The lifting guide frame is vertically provided with a second guide rail corresponding to the second sliding groove.

6. The refining furnace as described in claim 5, characterized in that: The second sliding groove is provided with a plurality of second guide rollers, and the roller surfaces of the plurality of second guide rollers are in rolling connection with the rail surface of the second guide rail.

7. The refining furnace as described in claim 6, characterized in that: It also includes a high-level silo for storing thermal insulation agent. The bottom outlet of the high-level silo is connected to the sprinkling hole on the furnace cover through the main feed pipe. The main feed pipe is equipped with a normally open solenoid valve.

8. The refining furnace as described in claim 7, characterized in that: The furnace cover is provided with a hollow material distribution cone. The main feed pipe is connected to the feed inlet at the top of the material distribution cone. Several material spreading holes are evenly distributed. Several material discharge holes corresponding to the material spreading holes are opened along the inner cone surface of the material distribution cone. The material discharge holes and the material spreading holes are connected by a material distribution pipe.

9. The refining furnace as described in claim 8, characterized in that: A gate is movably mounted on the furnace cover. The gate has several material passage holes corresponding to the material spreading holes. The material distribution pipe is connected to one end of the material passage holes. A second fixed pulley is provided on one side wall of the furnace cover. A second pull rope is fixedly connected to one side of the gate. The second pull rope passes around the second fixed pulley and extends upward to be fixedly connected to the conductive cross arm. A mounting seat is provided on the symmetrical side of the furnace cover and the second fixed pulley. A second spring is provided on the mounting seat. The second spring is fixedly connected to the edge of the gate. A locking block is fixedly mounted on the furnace cover. An elongated hole is provided on the gate, and the locking block extends into the elongated hole.

10. A method for emergency handling of power outages in refining furnaces, characterized in that: The refining furnace is the refining furnace according to claim 9, and includes the following steps: S1. After a municipal power outage, the lifting hydraulic cylinder is depressurized and loses its downward support function for the conductive cross arm. Since the weight of the counterweight is greater than the total weight of the electrode and the conductive cross arm, the counterweight sinks downward under its own weight. It passes through the first pull rope and around the first fixed pulley, pulling the conductive cross arm upward along the lifting guide frame in the opposite direction. The electrode moves upward synchronously until the electrode is completely separated from the molten manganese-iron alloy in the ladle. S2. During the downward movement of the counterweight along the lifting guide frame, the first sliding grooves on both sides of the counterweight cooperate with the first guide rail on the lifting guide frame. Combined with the first guide roller in the first sliding groove, the counterweight is guided to move smoothly without swaying or jamming. When the counterweight reaches the bottom of the lifting guide frame, it contacts the support plate of the buffer device. Under the action of the first spring and the damper, the support plate absorbs the impact force of the counterweight moving downward, preventing the counterweight from directly colliding with the bottom of the lifting guide frame. S3. The normally open solenoid valve on the main feed pipe connecting the bottom discharge port of the high-level silo will automatically open after power failure. The heat preservation agent in the high-level material enters the cone top of the distribution cone, disperses to the surroundings, and enters the ladle through the discharge hole-distribution pipe-spreading hole. It evenly covers the upper surface of the molten manganese-iron alloy to form a heat preservation and isolation layer, preventing the molten manganese-iron alloy from oxidizing and avoiding a rapid drop in the temperature of the molten manganese-iron alloy. S4. After the conductive cross arm moves to the top, pull the second pull rope. The second pull rope goes around the second fixed pulley to change the direction of force, and drives the gate to move horizontally along the surface of the furnace cover. The material passage on the gate is aligned with the material sprinkling hole on the furnace cover to ensure that the material sprinkling action is carried out after the electrode has risen to the position. S5. After power is restored, start the external hydraulic station to control the extension end of the lifting hydraulic cylinder to descend, pushing the conductive cross arm to slide down along the lifting guide frame. The conductive cross arm drives the electrode to descend synchronously until the electrode reaches the preset position required for refining. During the descent of the conductive cross arm, release the second pull rope, reset the second spring, pull the gate to move in the opposite direction, so that the material passage on the gate is misaligned with the material spreading hole on the furnace cover, close the heat preservation agent distribution channel, and close the main feed pipe after the normally open solenoid valve is energized, and the refining furnace resumes normal production process.

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