A ladle nozzle repairing device and a repairing method

Abstract

This invention provides a repair device and method for the ladle opening, belonging to the technical field. The technical solution of the ladle opening repair device includes a repair body with a repair space for accommodating part of the ladle opening. The repair body is connected to a fiber felt conveying mechanism and a spraying mechanism. The fiber felt conveying mechanism is used at least to convey fiber felt into the repair space, and the spraying mechanism is used at least to spray repair material into the repair space and the ladle opening. A lubrication mechanism is provided within the repair space to provide lubrication between the repair space and the fiber felt. The repair body is connected to a driving mechanism to drive the repair body to move along the ladle opening. This invention, by setting up a spraying mechanism, a fiber felt conveying mechanism, and a driving mechanism to move the repair body along the ladle opening, achieves simultaneous repair and movement, has a high degree of automation, and effectively improves repair efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel smelting equipment technology, and in particular to a repair device and method for the ladle opening. Background Technology

[0002] The ladle is a crucial piece of equipment in continuous casting, serving as the container for transporting and holding molten steel from tapping to pouring. The molten steel inside the ladle is at a high temperature and remains in the ladle for a long time, sometimes undergoing argon blowing and secondary refining. Many factors contribute to damage to the ladle lining; different parts of the ladle and different types of refractory bricks experience different effects, resulting in varying degrees of damage. At the slag line, the corrosive effect of the high-temperature slag on the refractory material exceeds that of the molten steel on the refractory bricks. The ladle wall and other parts, under high temperatures, experience less erosion from the slag and molten steel than the slag line, generally only bearing the scouring and abrasive effects of the molten steel. The bottom of the ladle, receiving molten steel, is subjected to mechanical scouring and strong mechanical impact, making it prone to spalling damage from the metamorphic layer interface.

[0003] Due to the high-temperature slag corrosion at the slag line, the repeated high-temperature-cooling process, and the mechanical damage from anchor hooks during cleaning, the refractory material at the ladle opening is easily damaged, increasing the consumption of refractory materials. Currently, manual repair is usually used, which has low repair efficiency and poor repair effect, thus affecting the service life of the ladle. Summary of the Invention

[0004] This invention addresses the problem that current manual repairs of ladle openings involve a large workload, resulting in low repair efficiency and poor repair effects, which in turn reduces the service life of the ladle. It proposes a ladle opening repair device and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a repair device for the ladle opening, comprising a repair body with a repair space for accommodating a portion of the ladle opening. The repair body is connected to a fiber felt conveying mechanism and a spraying mechanism. The fiber felt conveying mechanism is used at least to convey fiber felt into the repair space, and the spraying mechanism is used at least to spray repair material into the repair space and onto the ladle opening. A lubrication mechanism is provided within the repair space to provide lubrication between the repair space and the fiber felt. The repair body is connected to a drive mechanism to drive the repair body to move along the ladle opening. This device, by setting a drive mechanism to move the repair body along the ladle opening, repairs the opening in segments, achieving simultaneous repair and movement. Furthermore, by using the spraying mechanism and fiber felt conveying mechanism, the residual heat of the ladle is utilized to sinter the repair material and fiber felt with the ladle's refractory material, completing the repair. This effectively improves repair efficiency, enabling timely maintenance and efficient repair of the ladle opening, extending the ladle's service life. In addition, this structure has a high degree of automation, reducing labor intensity and process costs, avoiding safety and equipment hazards, and ensuring safe, stable, and smooth production.

[0007] Furthermore, the repair body includes a first plate, a second plate, and a third plate connected sequentially. These three plates form a U-shaped groove to create a repair space. The first plate has a first repair end face at one end of the repair space, which is opposite to the inner wall of the ladle. The second plate has a second repair end face at one end of the repair space, which is opposite to the edge of the ladle opening. This device, by using the first and second plates, can simultaneously repair both the inner wall and the edge of the ladle opening, further improving repair efficiency and effectiveness.

[0008] Furthermore, the first, second, and third plates are all arc-shaped structures, and the curvature of the first, second, and third plates matches the curvature of the ladle opening. This ensures consistency along the circumference of the ladle opening when the repair body moves, improving the repair body's ability to enclose the opening, thereby enhancing stability during repair and improving the repair effect.

[0009] Furthermore, the fiber felt conveying mechanism includes a first conveying roller and a second conveying roller. The first conveying roller is disposed on one side of the first plate so that the fiber felt conveyed by the first conveying roller is in contact with the first repair end face. The second conveying roller is disposed on one side of the second plate so that the fiber felt conveyed by the second conveying roller is in contact with the second repair end face. The rotation speed of the first and second conveying rollers is the same as the moving speed of the repair body. By setting the first and second conveying rollers to convey fiber felt to the first and second repair end faces respectively, the conveying efficiency is improved.

[0010] Furthermore, the lubrication mechanism includes multiple lubricant nozzles and lubricant pipelines connected to the lubricant nozzles. The multiple lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face. The lubricant nozzles spray lubricant delivered by the lubricant pipelines onto the first maintenance end face and the fiber felt, and between the second maintenance end face and the fiber felt.

[0011] Furthermore, both the first and second maintenance end faces are provided with lubrication holes, and the lubricant nozzles are located inside the lubrication holes.

[0012] Furthermore, the spraying mechanism includes a spray nozzle and a repair material conveying pipeline connected to the spray nozzle. The spray nozzle is located on one side of the repair space, and the spray nozzle and spraying direction face the repair space. The spray nozzle is at least used to spray the repair material conveyed by the repair material conveying pipeline between the fiber felt and the opening of the steel ladle.

[0013] Furthermore, the spraying mechanism includes a support frame, one end of which is connected to the repair body, and the other end is provided with a fixing part. The spraying nozzle and at least part of the repair material conveying pipeline are fixedly connected to the fixing part.

[0014] Furthermore, the drive mechanism includes multiple roller assemblies disposed on the bottom of the maintenance body.

[0015] Furthermore, the device includes a lifting mechanism, which includes a base and a lifting platform. The lifting platform is movably connected to the base and can move up and down relative to the base. The maintenance body is movably mounted on the lifting platform and can move along the ladle opening on the lifting platform.

[0016] Furthermore, the lifting platform is equipped with a circular guide rail, which is coaxially set with the ladle opening. The roller assembly is connected to the circular guide rail, allowing the maintenance body to move along the ladle opening.

[0017] The present invention also provides a repair method based on the above-described repair device for the mouth of a steel ladle, comprising the following steps:

[0018] S1. Hoist the ladle to be repaired to a position opposite to the main body of the repair, and rotate the ladle so that the ladle opening faces the repair space;

[0019] S2. Start the lubrication mechanism to spray lubricant into the repair space, and start the fiber felt conveying mechanism to lay the fiber felt in the repair space.

[0020] S3. Place the area of ​​the ladle to be repaired at the opening within the repair space;

[0021] S4. Start the spraying mechanism to spray the repair material between the fiber felt and the area to be repaired at the mouth of the steel ladle. The repair body is stationary relative to the steel ladle, and the fiber felt conveying mechanism is closed so that the repair body can sinter the fiber felt, repair material and refractory material inside the steel ladle into one piece through the temperature of the steel ladle itself.

[0022] S5. Start the drive mechanism to drive the repair body to move along the ladle opening to the next area to be repaired. At the same time, start the fiber felt conveying mechanism to synchronously convey fiber felt into the repair space. Repeat step S4 to repair the next area to be repaired.

[0023] S6. Repeat steps S4 and S5 until the ladle opening is repaired and the ladle is separated from the repair body.

[0024] Furthermore, in S4, the maintenance body remains stationary relative to the ladle for 1-3 minutes.

[0025] As can be seen from the above technical solutions, the advantages of the present invention are:

[0026] This invention uses a drive mechanism to move the repair body along the ladle opening, repairing the opening in sections. This allows for simultaneous repair and movement. Furthermore, by incorporating a spraying mechanism and a fiber felt conveying mechanism, the residual heat of the ladle is used to sinter the repair material and fiber felt with the ladle's refractory material, completing the repair. This significantly improves repair efficiency, enabling timely maintenance and efficient repair of the ladle opening, thus extending the ladle's lifespan. In addition, this structure has a high degree of automation, reducing labor intensity and process costs, avoiding safety and equipment hazards, and ensuring safe, stable, and smooth production. Attached Figure Description

[0027] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the cooperation structure between the maintenance body and the steel ladle in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the main structure of the maintenance body in one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the left-side structure of the maintenance body in one embodiment of the present invention;

[0031] Figure 4 This is a top view of the maintenance body in one embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the device before repairing a steel ladle in one embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the device in the repair of a steel ladle in one embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the device after repairing a steel ladle in one embodiment of the present invention.

[0035] Explanation of key figure labels:

[0036] 100. Steel ladle; 110. Refractory material; 120. Ladle opening; 200. Main maintenance unit; 210. Repair space; 220. First plate; 230. Second plate; 240. Third plate; 300. Fiber felt; 410. First conveyor roller; 420. Second conveyor roller; 510. Roller assembly; 600. Spraying mechanism; 610. Spray nozzle; 620. Support frame; 710. Base; 720. Lifting platform. Detailed Implementation

[0037] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0038] The general requirements for refractory materials used in Ladle 100 are: they should form a dense, semi-molten layer at high temperatures; during use, the brick layer should expand slightly, ensuring the entire lining is tightly integrated; the lining must have good thermal shock resistance; and it should have good erosion resistance. This improves the resistance to penetration by molten steel and slag; enhances the overall integrity of the lining, ensuring a tight bond between the bricks; since Ladle 100 is an intermittent operation, it must be able to withstand repeated high-temperature and cooling processes and be used multiple times; and it should minimize the shedding of refractory materials into the molten steel to improve the cleanliness of the steel. In the initial stage of use, the surface of Ladle 100 at the ladle opening (120) is smooth and slag does not easily adhere. However, in the middle stage, due to gradual erosion of the working surface, cracks and fissures appear, making it easier for slag to adhere. Molten steel and slag can easily seep in through these cracks, eventually leading to slag adhesion around the entire circumference of the ladle opening (120). When a large volume of molten steel is charged and the steel-slag interface reaches the ladle rim during the refining process in the 100-ton ladle, a chemical reaction occurs between the slag and the rim material. Combined with physical erosion, this leads to abnormal erosion of the rim material, further increasing the slag adhesion rate and potentially causing leakage at the slag line. During the turnover of the 100 ladle, abnormal erosion exposes the internal steel pressure bricks, which, without refractory protection, are continuously oxidized and melted. After the 100 ladle is decommissioned, the maintenance of the pressure bricks increases, raising labor and material costs. Severe slag adhesion at the ladle opening (120mm) can affect the raising and lowering of the vacuum insertion tube, necessitating the use of anchor hooks. However, this anchor hook treatment can easily cause circumferential cracks or damage to the slag line bricks, disrupting production. To avoid the impact of an excessively large ladle rim on steelmaking, refining, and ladle baking, and to prevent damage to the rim bricks during post-processing that could lead to abnormal production line shutdowns, it is essential to conduct timely inspections and maintenance of the ladle rim and ladle opening at 120mm to ensure the normal and safe operation of production.

[0039] Please see Figures 1-7 The present invention provides a repair device for the opening of a ladle, comprising a repair body 200, the repair body 200 having a repair space for accommodating a portion of the opening 120 of a ladle 100, the repair body 200 being connected to a fiber felt 300 conveying mechanism and a spraying mechanism 600, the fiber felt 300 conveying mechanism being used at least to convey fiber felt 300 into the repair space, the spraying mechanism 600 being used at least to spray repair material into the repair space and the opening 120 of the ladle 100, the repair space being provided with a lubrication mechanism, the lubrication mechanism being used at least to provide lubrication between the repair space and the fiber felt 300, and the repair body 200 being connected to a driving mechanism, the driving mechanism being used at least to drive the repair body 200 to move along the opening 120 of the ladle 100.

[0040] In this embodiment, as Figure 1The ladle 100 has a circular opening 120 with a relatively large diameter. To facilitate repair, it needs to be repaired in sections. The repair body 200 is placed horizontally, and the ladle 100 is inverted so that the opening 120 faces vertically downwards towards the repair space 210. This makes it easier to insert the portion of the ladle 100 to be repaired into the repair space 210. During repair, the fiber felt 300 is first laid in the repair space 210 using a fiber felt 300 conveying mechanism, and then the area of ​​the opening 120 to be repaired is placed in the repair space 210. Inside, the repair material is then sprayed between the area to be repaired and the fiber felt 300 by the spraying mechanism 600. Due to the residual heat of the ladle 100, the repair material, fiber felt 300 and refractory material 110 of the ladle 100 are sintered together to fill the damaged part of the ladle opening 120, thereby completing the repair of the ladle opening 120 of the ladle 100. Afterwards, the repair body 200 is driven by the drive mechanism to move circumferentially along the ladle opening 120 of the ladle 100 to repair other positions of the ladle opening 120, and to carry out segmented repair. In addition, when the fiber felt 300 is laid between the repair spaces 210, a lubricant is sprayed into the repair spaces 210 through a lubrication mechanism, so that there is a lubrication effect between the fiber felt 300 and the repair spaces 210. This makes it easier for the fiber felt 300 to separate from the repair body 200 when the repair body 200 is moved to the next repair point after the fiber felt 300 is sintered together with the steel ladle 100 and refractory 110. This effectively avoids the problem that the fiber felt 300 is moved when the repair body 200 moves due to the large friction between the fiber felt 300 and the repair body 200, which would cause the fiber felt 300 to tear and affect the repair effect.

[0041] In the above structure, a drive mechanism is set up to move the maintenance body 200 along the ladle opening 120 of the ladle 100, thereby allowing the ladle opening 120 to be repaired in sections, achieving simultaneous repair and movement. By setting up a spraying mechanism 600 and a fiber felt 300 conveying mechanism, the residual heat of the ladle 100 is used to sinter the repair material and fiber felt 300 with the refractory material 110 of the ladle 100, thereby completing the repair. This can effectively improve the repair efficiency, enabling timely maintenance and efficient repair of the ladle opening 120 of the ladle 100, and extending the service life of the ladle 100. In addition, this structure has a high degree of automation, reducing labor intensity and process costs, avoiding safety and equipment hazards, and ensuring safe, stable and smooth production.

[0042] In the specific structure of the maintenance body 200, such as Figure 2 , 3As shown in Figure 4, the repair body 200 includes a first plate 220, a second plate 230, and a third plate 240 connected in sequence. The first plate 220, the second plate 230, and the third plate 240 form a U-shaped groove to create a repair space 210. The first plate 220 has a first repair end face at one end of the repair space 210, which is opposite to the inner wall of the ladle 100. The second plate 230 has a second repair end face at one end of the repair space 210, which is opposite to the edge of the ladle opening 120 of the ladle 100. The first plate 220, the second plate 230, and the third plate 240 are all arc-shaped structures, and the curvature of the first plate 220, the second plate 230, and the third plate 240 is consistent with the curvature of the ladle opening 120 of the ladle 100.

[0043] In this embodiment, the repair body 200 includes a first plate 220, a second plate 230, and a third plate 240. The first plate 220 and the third plate 240 are arranged vertically, and the second plate 230 is arranged horizontally. The second plate 230 is connected between the first plate 220 and the third plate 240, and is positioned at the lower end of the first plate 220 and the third plate 240. This allows the first plate 220, the second plate 230, and the third plate 240 to form an upward-opening U-shaped groove structure. This U-shaped groove is a repair space 210, which has an upward opening to facilitate placing the part of the bag opening 120 to be repaired. Within the repair space 210, when the ladle opening 120 is placed in the repair space 210, the first plate 220 is located inside the ladle 100, the second plate 230 corresponds to the edge of the ladle opening 120 of the ladle 100, and the third plate 240 is located outside the ladle 100. A first repair end face is formed at the end of the first plate 220 near the inner wall of the ladle 100, thereby repairing the inner wall side of the ladle 100. A second repair end face is formed at the end of the second plate 230 near the ladle 100, thereby repairing the edge of the ladle opening 120 of the ladle 100. The third plate 240 can restrict the position of the ladle 100 to prevent the ladle 100 from shifting during repair.

[0044] In the above structure, by setting the first plate 220 and the second plate 230, the inner wall of the ladle 100 and the edge of the ladle opening 120 can be repaired simultaneously, further improving the repair efficiency and effect. Furthermore, the first plate 220, the second plate 230, and the third plate 240 are all arc-shaped structures with a curvature consistent with the ladle opening 120. Specifically, the first plate 220, the second plate 230, and the third plate 240 are all arc-shaped plate structures with a curvature consistent with the ladle opening 120. The inner diameter of the first plate 220 is the same as the outer diameter of the ladle opening 120, thus ensuring consistency in the circumferential direction of the ladle opening 120 when the repair body 200 moves. This improves the wrapping effect of the repair body 200 around the ladle opening 120, thereby enhancing stability during repair and improving the repair effect.

[0045] In the specific structure of the fiber felt 300 conveying mechanism, such as Figure 3 , 4 As shown, the fiber felt 300 conveying mechanism includes a first conveying roller 410 and a second conveying roller 420. The first conveying roller 410 is disposed on one side of the first plate 220 so that the fiber felt 300 conveyed by the first conveying roller 410 is in contact with the first maintenance end face. The second conveying roller 420 is disposed on one side of the second plate 230 so that the fiber felt 300 conveyed by the second conveying roller 420 is in contact with the second maintenance end face. The rotation speed of the first conveying roller 410 and the second conveying roller 420 is the same as the moving speed of the maintenance body 200.

[0046] In this embodiment, since the first and second repair end faces respectively repair the inner wall of the ladle 100 and the edge of the ladle opening 120, the fiber felt 300 is conveyed to the first repair end face via the first conveying roller 410 and to the second repair end face via the second conveying roller 420 in the fiber felt 300 conveying mechanism. This simultaneously meets the needs of different repair end faces. The first conveying roller 410 is positioned on the front end side of the first plate 220 along the moving direction of the repair body 200. The axial direction of 0 is consistent with the vertical direction, that is, consistent with the height direction of the first plate 220, so that the fiber felt 300 conveyed by the first conveying roller 410 can fit against the first repair end face, thereby achieving a better repair effect. Similarly, the second conveying roller 420 is set on the front end side of the second plate 230 along the moving direction of the repair body 200, and the axial direction of the second conveying roller 420 is consistent with the width direction of the front end of the second plate 230, so that the fiber felt 300 conveyed by the second conveying roller 420 can fit against the second repair end face.

[0047] In the above structure, by setting the first conveying roller 410 and the second conveying roller 420 to convey the fiber felt 300 to the first repair end face and the second repair end face respectively, the conveying efficiency is improved and the repair effect is improved. In addition, the fiber felt 300 can effectively buffer the pressure of the sintering expansion of the repair material on the first plate 220 and the second plate 230.

[0048] In the specific structure of the lubrication mechanism, the lubrication mechanism includes multiple lubricant nozzles and lubricant pipelines connected to the lubricant nozzles. The multiple lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face. The lubricant nozzles spray lubricant delivered by the lubricant pipelines onto the first maintenance end face and the fiber felt 300, as well as between the second maintenance end face and the fiber felt 300. Both the first and second maintenance end faces are provided with lubrication holes, and the lubricant nozzles are located in the lubrication holes.

[0049] In this embodiment, multiple evenly distributed lubrication holes are provided on both the first plate 220 and the second plate 230. These lubrication holes can be through-hole structures. Lubricant nozzles are then installed one-to-one within these lubrication holes. The lubricant nozzles are positioned below the end faces of the first and second plates 220 and 230, meaning they do not protrude from the first and second repair end faces. This ensures effective lubrication between the first and second plates 220 and the fiber felt 300 without affecting the adhesion of the fiber felt 300, preventing misalignment of the fiber felt 300 when the repair body 200 is moved. A lubricant pipeline is connected to the tail end of each lubricant nozzle, allowing for timely replenishment of lubricant to meet repair needs.

[0050] In the specific structure of the spraying mechanism 600, such as Figure 3 , 4 As shown, the spraying mechanism 600 includes a spray nozzle 610 and a repair material conveying pipeline communicating with the spray nozzle 610. The spray nozzle 610 is located on one side of the repair space 210, and the spray nozzle 610 and the spraying direction face the repair space 210. The spray nozzle 610 is used at least to spray the repair material conveyed by the repair material conveying pipeline between the fiber felt 300 and the opening 120 of the steel ladle 100. The spraying mechanism 600 includes a support frame 620, one end of which is connected to the repair body 200, and the other end is provided with a fixing part. The spray nozzle 610 and at least part of the repair material conveying pipeline are fixedly connected to the fixing part.

[0051] In this embodiment, a spray nozzle 610 is provided at the front end of the repair body 200 along the moving direction, with the spray nozzle 610 facing the repair space 210. When the part to be repaired, the cover 120, is placed in the repair space 210, the spray nozzle 610 can spray repair material into the gap between the fiber felt 300 and the cover 120, thereby allowing the repair material to sinter with the fiber felt 300 and the refractory material 110 at the cover 120 to complete the repair work. In addition, by providing a support frame 620, the support of the spray nozzle 610 is improved, thereby improving the stability of the spraying of material from the spray nozzle 610 and avoiding deviations in the spraying direction of the spray nozzle 610 due to vibrations during movement. Furthermore, a repair material delivery pipeline is connected to the rear end of the spray nozzle 610 to replenish the repair material in a timely manner.

[0052] Furthermore, in the specific structure for the movement of the maintenance body 200, the drive mechanism includes multiple roller assemblies 510 disposed on the maintenance body 200, with the roller assemblies 510 evenly distributed at the bottom of the maintenance body 200. The device includes a lifting mechanism, which comprises a base 710 and a lifting platform 720. The lifting platform 720 is movably connected to the base 710 and can move up and down relative to the base 710. The maintenance body 200 is movably disposed on the lifting platform 720, and can move along the ladle opening 120 of the ladle 100 on the lifting platform 720. The lifting platform 720 is provided with an annular guide rail, which is coaxially arranged with the ladle opening 120 of the ladle 100. The roller assemblies 510 are connected to the annular guide rail, allowing the maintenance body 200 to move along the ladle opening 120 of the ladle 100.

[0053] In this embodiment, four roller assemblies 510 can be provided at the bottom of the repair body 200. These four roller assemblies 510 are respectively installed at the four corners of the repair body 200, thereby facilitating the movement of the repair body 200 while ensuring its stability. In addition, the device is also provided with a lifting mechanism. The base 710 is fixed on the ground or platform, and the lifting platform 720 is movably installed on the upper part of the base 710. The lifting platform 720 can move up and down relative to the base 710 via a hydraulic lifting rod. The repair body is installed on the lifting platform 720. After the ladle 100 is inverted so that the ladle opening 120 is vertically downward, the lifting platform 720 lifts the repair body up to the part of the ladle opening 120 to be repaired and places it in the repair space 210. After the repair is completed, the lifting platform 720 lowers the repair body, separating the repair body from the ladle 100, further improving its automation and repair efficiency. In addition, an annular guide rail is provided on the lifting platform 720 for the ladle opening 120 around the ladle 100. The roller assembly 510 of the maintenance body 200 is connected to the guide rail, thereby ensuring the movement accuracy of the maintenance body 200 and improving its movement stability.

[0054] Please see Figures 5-7 The repair method using the above-described repair device for the ladle opening includes the following steps:

[0055] S1. Hoist the ladle 100 to be repaired to a position opposite to the repair body 200, and rotate the ladle 100 so that the ladle opening 120 faces the repair space 210.

[0056] In this step, such as Figure 5 As shown, based on the corrosion condition of ladle 100 and the production schedule, it is determined whether ladle 100 needs repair. After the continuous casting machine finishes casting, a crane is used to remove the remaining slag from the ladle. Ladle 100 is then hoisted to the ladle 100 maintenance platform, where a rotating support device drives the ladle 100 trunnion to rotate until the ladle opening 120 is vertically downward.

[0057] S2. Start the lubrication mechanism to spray lubricant into the repair space 210, and start the fiber felt 300 conveying mechanism to lay the fiber felt 300 in the repair space 210.

[0058] In this step, the lubrication mechanism is activated to prepare lubricant on the surfaces of the first plate 220, the second plate 230 and the third plate 240 in the repair space 210, and then the fiber felt 300 conveying mechanism is activated to pre-lay it on the first and second repair end faces.

[0059] S3. Place the area to be repaired, the ladle opening 120 of the ladle 100, into the repair space 210. In this step, control the lifting platform 720 to rise, thereby raising the repair body 200 to the repair work position.

[0060] S4. Activate the spraying mechanism 600 to spray repair material between the fiber felt 300 and the area to be repaired at the ladle opening 120 of the steel ladle 100. The repair body 200 remains stationary relative to the steel ladle 100, and the fiber felt 300 conveying mechanism is closed. This allows the repair body 200 to sinter the fiber felt 300, the repair material, and the refractory material 110 inside the steel ladle 100 together using the heat of the steel ladle 100 itself. In S4, the repair body 200 remains stationary relative to the steel ladle 100 for 1-3 minutes.

[0061] In this step, such as Figure 6As shown, the spraying mechanism 600 can be activated first to pre-spray an appropriate amount of material onto the first plate 220 and the second plate 230, which are covered with fiber felt 300. The amount of sprayed material depends on the extent of the erosion to be repaired. When the area to be repaired at the ladle opening 120 is placed within the repair space 210, spraying continues to fill the gap between the fiber felt 300 and the refractory material 110 of the ladle 100. The sprayed repair material solidifies and sets with the refractory material 110 of the ladle 100 under the residual heat. During the sintering process, the repair body 200 remains stationary relative to the ladle 100 for approximately 1-3 minutes, adjusting the time according to the amount of sprayed repair material to ensure that the sprayed repair material is not liquid and has solidified after sintering. This prevents the repair body 200 from collapsing due to incomplete sintering of the repair material after movement.

[0062] S5. Start the drive mechanism to drive the repair body 200 to move along the opening 120 of the ladle 100 to the next area to be repaired. At the same time, start the fiber felt 300 conveying mechanism to synchronously convey the fiber felt 300 to the repair space 210. Repeat step S4 to repair the next area to be repaired.

[0063] In this step, after the previous repair area is sintered, the drive mechanism is activated, causing the repair body 200 to move along the circumferential trajectory of the ladle 100's opening 120. At this time, the high-temperature resistant fiber felt 300, the spray repair material, and the refractory material 110 of the ladle 100 are sintered together, while the first plate 220, the second plate 230, and the third plate 240, under the action of lubricant, separate from the fiber felt 300 and move relative to each other for subsequent repair of the refractory material 110. When the repair body 200 moves, the fiber felt 300 conveying mechanism starts synchronously, and the conveying speed of the fiber felt 300 is consistent with the moving speed of the repair body 200, keeping the fiber felt 300 and the refractory material 110 relatively stationary. Because the fiber felt 300, the refractory material 110, and the spray repair material are sintered and bonded together, the lubricant is replenished in time when the repair body 200 moves, ensuring lubrication for the separation and relative movement of the first plate 220, the second plate 230, and the third plate 240 from the fiber felt 300.

[0064] S6. Repeat steps S4 and S5 until the ladle opening 120 of the steel ladle 100 is repaired, then separate the steel ladle 100 from the repair body 200. In this step, if... Figure 7As shown, the repair body 200 continues to move around the circumference of the ladle opening 120 of the ladle 100, simultaneously conveying the fiber felt 300, spraying repair material, and replenishing lubricant. After the repair body 200 moves, the sprayed repair material, fiber felt 300, and refractory material 110 at the ladle opening 120 are sintered together, achieving repair of the eroded area of ​​the refractory material 110 at the ladle opening 120 of the ladle 100. When the erosion is minor (less refractory material 110 loss, smaller gaps), less sprayed repair material is used, sintering is faster, and the movement speed of the repair body 200 is faster. Conversely, when the gaps are larger, more sprayed repair material is used, sintering is slower, and the movement speed of the repair body 200 is slower. In short, it is required that the gap between the repair body 200 and the refractory material 110 at the ladle opening 120 be completely filled when spraying repair material. The amount of sprayed repair material used is controlled by the spray nozzle 610 and the speed of the repair body 200.

[0065] In addition, during the repair process, when the main repair unit 200 moves, the area behind it that has been filled and sintered provides a certain degree of sealing for the preceding spray repair material. This facilitates the compression and compaction of the subsequent spray material, ensuring the effectiveness of the spray repair. After the main repair unit 200 completes one circular movement, the spray system for the repair material is shut off, and the repair vehicle is driven. Then, the lifting platform 720 is lowered to a non-working position, completing the repair work on the ladle opening 120 of the steel ladle 100. Normal ladle loading operations are then performed (replacing the slide plate and nozzle, cleaning the permeable brick residue, and filling with sand, etc.).

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A repair device for the opening of a steel ladle, characterized in that, The device includes a repair body with a repair space that accommodates at least part of the ladle opening. The repair body is connected to a fiber felt conveying mechanism and a spraying mechanism. The fiber felt conveying mechanism is used to convey fiber felt into the repair space, and the spraying mechanism is used to spray repair material into the repair space and the ladle opening. The repair space is equipped with a lubrication mechanism that provides lubrication between the repair space and the fiber felt. The repair body is connected to a drive mechanism that drives the repair body to move along the ladle opening.

2. The repair device for the opening of a steel ladle according to claim 1, characterized in that, The repair body includes a first plate, a second plate, and a third plate connected in sequence. The first plate, the second plate, and the third plate form a U-shaped groove to form the repair space. The first plate has a first repair end face at one end of the repair space, which is opposite to the inner wall of the ladle. The second plate has a second repair end face at one end of the repair space, which is opposite to the edge of the ladle opening. And / or, the first plate, the second plate, and the third plate are all arc-shaped structures, and the curvature of the first plate, the second plate, and the third plate is consistent with the curvature of the ladle opening.

3. The repair device for the opening of a steel ladle according to claim 2, characterized in that, The fiber felt conveying mechanism includes a first conveying roller and a second conveying roller. The first conveying roller is disposed on one side of the first plate so that the fiber felt conveyed by the first conveying roller is in contact with the first repair end face. The second conveying roller is disposed on one side of the second plate so that the fiber felt conveyed by the second conveying roller is in contact with the second repair end face. The rotation speed of the first conveying roller and the second conveying roller is the same as the movement speed of the repair body.

4. The repair device for the opening of a steel ladle according to claim 3, characterized in that, The lubrication mechanism includes multiple lubricant nozzles and lubricant pipelines connected to the lubricant nozzles. The multiple lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face. The lubricant nozzles are used at least to spray the lubricant delivered by the lubricant pipelines onto the first maintenance end face and the fiber felt, as well as between the second maintenance end face and the fiber felt. And / or, both the first maintenance end face and the second maintenance end face are provided with lubrication holes, and the lubricant nozzle is located in the lubrication hole.

5. The repair device for the opening of a steel ladle according to claim 3, characterized in that, The spraying mechanism includes a spray nozzle and a repair material conveying pipeline connected to the spray nozzle. The spray nozzle is located on one side of the repair space, and the spray nozzle and the spraying direction are facing the repair space. The spray nozzle is at least used to spray the repair material conveyed by the repair material conveying pipeline between the fiber felt and the opening of the steel ladle. And / or, the spraying mechanism includes a support frame, one end of which is connected to the repair body, and the other end is provided with a fixing part, wherein the spraying nozzle and at least part of the repair material conveying pipeline are fixedly connected to the fixing part.

6. The repair device for the opening of a steel ladle according to claim 1, characterized in that, The drive mechanism includes multiple roller assemblies disposed on the repair body, and the multiple roller assemblies are evenly distributed at the bottom of the repair body.

7. The repair device for the opening of a steel ladle according to claim 6, characterized in that, The device includes a lifting mechanism, which comprises a base and a lifting platform. The lifting platform is movably connected to the base and can move up and down relative to the base. The maintenance body is movably disposed on the lifting platform and can move along the opening of the ladle on the lifting platform.

8. The repair device for the opening of a steel ladle according to claim 7, characterized in that, The lifting platform is equipped with a ring guide rail, which is coaxially arranged with the opening of the ladle. The roller assembly is connected to the ring guide rail, so that the maintenance body can move along the opening of the ladle.

9. A repair method based on the repair device for the ladle opening according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Hoist the ladle to be repaired to a position opposite to the repair body, and rotate the ladle so that the opening of the ladle faces the repair space; S2. Start the lubrication mechanism to spray lubricant into the repair space, and start the fiber felt conveying mechanism to lay the fiber felt in the repair space; S3. Place the area to be repaired at the opening of the ladle into the repair space; S4. Start the spraying mechanism to spray the repair material between the fiber felt and the area to be repaired at the opening of the steel ladle. The repair body is stationary relative to the steel ladle, and the fiber felt conveying mechanism is closed, so that the repair body can sinter the fiber felt, the repair material and the refractory material inside the steel ladle into one piece by the temperature of the steel ladle itself. S5. Start the drive mechanism to drive the repair body to move along the ladle opening to the next area to be repaired. At the same time, start the fiber felt conveying mechanism to synchronously convey the fiber felt to the repair space. Repeat step S4 to repair the next area to be repaired. S6. Repeat steps S4 and S5 until the steel ladle opening is repaired and the steel ladle is separated from the repair body.

10. The repair method according to claim 9, characterized in that, In S4, the maintenance body remains stationary relative to the ladle for 1-3 minutes.

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