Steel ladle mouth repairing device and method

Abstract

The invention provides a steel ladle mouth repairing device and method, and belongs to the technical field. According to the technical scheme, the repairing device for the ladle opening of the steel ladle comprises a repairing body, the repairing body is provided with a repairing space for containing part of the ladle opening of the steel ladle, the repairing body is connected with a fiber felt conveying mechanism and a material spraying mechanism, and the fiber felt conveying mechanism is at least used for conveying fiber felt to the repairing space; the material spraying mechanism is at least used for spraying a repairing material to the repairing space and a ladle opening of the steel ladle, a lubricating mechanism is arranged in the repairing space and at least used for providing lubrication between the repairing space and the fiber felt, the repairing body is connected with a driving mechanism, and the driving mechanism is at least used for driving the repairing body to move along the ladle opening of the steel ladle. The spraying mechanism, the fibrofelt conveying mechanism and the driving mechanism are arranged to drive the maintenance main body to move along the ladle opening of the steel ladle, the purpose of moving while repairing is achieved, the automation degree is high, and the repairing efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel smelting equipment, and in particular to a ladle mouth repairing device and a ladle mouth repairing method. Background Art

[0002] The ladle is an important equipment for continuous casting. It is a container for carrying and holding molten steel from steel tapping to pouring. The temperature of the molten steel in the ladle is high and the residence time is long. Sometimes, argon blowing and secondary refining are also carried out. There are many factors that cause damage to the ladle lining. Different parts of the ladle and different types of bricks are subjected to different effects, and the damage is also different. At the slag line of the ladle, the high-temperature slag's ability to corrode the refractory material exceeds the erosion of the brick lining by the molten steel. At high temperatures, the ladle wall and other parts are less corroded by slag and molten steel than the slag line, and generally only bear the erosion and wear of molten steel. When the ladle bottom receives molten steel, it is mechanically eroded by the molten steel and subjected to strong mechanical impact, and it is easy to cause peeling damage from the interface of the metamorphic layer.

[0003] Due to the high-temperature slag erosion at the slag line, repeated high-temperature-cooling effects and multiple uses, as well as mechanical damage by anchor hooks during cleaning, the refractory material at the ladle mouth is very easy to be damaged, increasing the consumption of refractory materials. Currently, manual repairs are usually used, which has low repair efficiency and poor repair effects, thus affecting the service life of the ladle. Summary of the invention

[0004] Aiming at the problem that the current manual repair of the ladle mouth is large in repair work, the repair efficiency is low, the repair effect is poor, and the service life of the ladle is reduced, the present invention proposes a ladle mouth repair device and a ladle mouth repair method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a ladle mouth repair device, comprising a repair body, the repair body is provided with a repair space for accommodating a part of the ladle mouth, the repair body is connected with a fiber felt conveying mechanism and a spraying mechanism, the fiber felt conveying mechanism is at least used to convey fiber felt to the repair space, the spraying mechanism is at least used to spray repair material to the repair space and the ladle mouth, a lubrication mechanism is provided in the repair space, the lubrication mechanism is at least used to provide lubrication between the repair space and the fiber felt, the repair body is connected with a driving mechanism, and the driving mechanism is at least used to drive the repair body to move along the ladle mouth. The device drives the repair body to move along the ladle mouth by setting a driving mechanism, repairs the ladle mouth in sections, and realizes repairing while moving, and by setting a spraying mechanism and a fiber felt conveying mechanism, the repair material and the fiber felt are sintered with the refractory material of the ladle by the residual heat of the ladle to complete the repair, which can effectively improve the repair efficiency, timely maintain and efficiently repair the ladle mouth, and improve the service life of the ladle. In addition, the structure has a high degree of automation, reduces labor intensity and process costs, avoids safety and equipment hazards, and ensures safe, stable and smooth production.

[0007] Furthermore, the repair body includes a first plate body, a second plate body and a third plate body connected in sequence, the first plate body, the second plate body and the third plate body surround a U-shaped groove to form a repair space, the first plate body is provided with a first repair end face at one end of the repair space, the first repair end face is arranged opposite to the inner wall of the ladle, and the second plate body is provided with a second repair end face at one end of the repair space, the second repair end face is arranged opposite to the edge of the ladle mouth. By arranging the first plate body and the second plate body, the device can repair the inner wall and the edge of the ladle mouth at the same time, further improving the repair efficiency and repair effect.

[0008] Furthermore, 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, so that the ladle opening is kept consistent in the circumferential direction when the repair body moves, thereby improving the wrapping of the ladle opening by the repair body, thereby improving the stability during repair and improving the repair effect.

[0009] Furthermore, the fiber mat conveying mechanism includes a first conveying roller and a second conveying roller, the first conveying roller is arranged on one side of the first plate body so that the fiber mat conveyed by the first conveying roller fits with the first maintenance end face, the second conveying roller is arranged on one side of the second plate body so that the fiber mat conveyed by the second conveying roller fits with the second maintenance end face, and the rotation speed of the first conveying roller and the second conveying roller is consistent with the moving speed of the maintenance body. By arranging the first conveying roller and the second conveying roller to convey the fiber mat to the first maintenance end face and the second maintenance end face respectively, the conveying efficiency is improved.

[0010] Furthermore, the lubrication mechanism includes a plurality of lubricant nozzles and a lubricant pipeline connected to the lubricant nozzles, the plurality of lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face, and the lubricant nozzles are used at least to spray the lubricant transported by the lubricant pipeline on the first maintenance end face and the fiber felt, and between the second maintenance end face and the fiber felt.

[0011] Furthermore, the first maintenance end surface and the second maintenance end surface are both provided with lubrication holes, and the lubricant nozzles are arranged in the lubrication holes.

[0012] Furthermore, the spraying mechanism includes a spraying port and a repair material conveying pipeline connected to the spraying port. The spraying port is arranged on one side of the repair space, and the spraying port and the spraying direction are toward the repair space. The spraying port is at least used to spray the repair material conveyed by the repair material conveying pipeline between the fiber felt and the ladle mouth.

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

[0014] Furthermore, the driving mechanism includes a plurality of roller assemblies arranged on the maintenance body, and the plurality of roller assemblies are evenly distributed 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 be lifted and lowered relative to the base. The maintenance body is movably arranged on the lifting platform, and the maintenance body can move along the mouth of the ladle on the lifting platform.

[0016] Furthermore, the lifting platform is provided with an annular guide rail, which is coaxially arranged with the opening of the ladle, and the roller assembly is cooperatively connected with the annular guide rail, so that the maintenance body moves along the opening of the ladle.

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

[0018] S1. Lift the ladle to be repaired to a position opposite to the repair body, and rotate the ladle so that the ladle mouth faces the repair space;

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

[0020] S3, placing the area of ​​the ladle opening to be repaired in the repair space;

[0021] S4, start the spraying mechanism to spray the repair material between the fiber felt and the ladle opening to be repaired, the repair body is stationary relative to the 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 in the ladle into one by the temperature of the ladle itself;

[0022] S5, starting the driving mechanism to drive the maintenance body to move along the ladle opening to the next area to be repaired, and at the same time starting the fiber felt conveying mechanism to synchronously convey the fiber felt to the repair space, and repeating 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 maintenance body.

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

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

[0026] The present invention provides a driving mechanism to drive the maintenance body to move along the ladle mouth, repairs the ladle mouth in sections, realizes moving while repairing, and provides a spraying mechanism and a fiber felt conveying mechanism, utilizes the residual heat of the ladle to sinter the repair material and the fiber felt with the refractory material of the ladle to complete the repair, which can effectively improve the repair efficiency, timely maintain and efficiently repair the ladle mouth, and increase the service life of the ladle. In addition, the structure has a high degree of automation, reduces labor intensity and process costs, avoids safety and equipment hazards, and ensures safe, stable and smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the matching structure of the maintenance body and the ladle in one embodiment of the present invention;

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

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

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

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

[0033] Figure 6 It is a schematic diagram of the structure of the device for repairing a ladle in one embodiment of the present invention;

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

[0035] Description of main reference numerals:

[0036] 100, ladle; 110, refractory material; 130, ladle opening; 200, maintenance body; 210, repair space; 220, first plate; 230, second plate; 240, third plate; 300, fiber felt; 410, first conveying roller; 420, second conveying roller; 510, roller assembly; 600, spraying mechanism; 610, spraying opening; 620, support frame; 710, base; 720, lifting platform. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0038] The general requirements for refractory materials for ladle 100 are: it can form a dense layer in a semi-molten state under high temperature; during use, the brick layer has a slight expansion, so that the entire brick lining is tightly integrated; the brick lining must have good thermal shock resistance; the brick lining should have good corrosion resistance. Thereby improving the ability to resist the penetration of molten steel and slag; improving the integrity of the brick lining, so that the brick linings are tightly combined; the ladle 100 is an intermittent operation, and it must be able to withstand high temperature and cooling repeatedly and be used many times; minimizing the shedding of refractory materials into the molten steel to improve the cleanliness of the molten steel. In the early stage of the use of the ladle 100 furnace, the surface of the ladle mouth 130 is flat and smooth, and the slag is not easy to adhere. In the middle stage of use, due to the gradual erosion of the working surface, cracks and cracks appear, slag is easy to adhere, and molten steel and slag are more likely to penetrate from the cracks, eventually resulting in slag sticking to the entire ladle mouth 130. When the amount of molten steel is large and the steel slag interface reaches the edge of the ladle during the refining process in the ladle 100 furnace, the slag of the ladle 100 reacts chemically with the edge of the ladle, and the physical scouring can cause abnormal erosion of the edge of the ladle. The rate of slag sticking to the edge of the ladle 100 will further increase, and even leakage may occur at the slag line. During the turnover of the ladle 100, the abnormal erosion of the ladle edge causes the internal steel brick pressing plate to be exposed, and the brick pressing plate loses the protection of the refractory material and is continuously oxidized and melted. After the ladle 100 is offline, the maintenance of the brick pressing plate increases, and the manpower and material costs increase. When the ladle mouth 130 of the ladle 100 is seriously sticky with slag, it will affect the lifting and lowering of the vacuum insertion tube, and it is forced to use an anchor hook for processing. When the anchor hook is processed, it is easy to produce annular seams or damage the slag line bricks, affecting the production rhythm. In order to avoid the influence of large ladle rim on steelmaking, refining and baking of ladle 100, and to avoid abnormal offline of ladle 100 due to damage of ladle rim bricks during post-processing, it is necessary to timely inspect and maintain the ladle rim 130 of ladle 100 to ensure the normal and safe operation of production.

[0039] See also Figure 1-Figure 7 The present invention provides a repairing device for a ladle mouth, comprising a repairing body 200, wherein the repairing body 200 is provided with a repairing space for accommodating a part of the mouth 130 of the ladle 100, the repairing body 200 is connected with a fiber felt 300 conveying mechanism and a spraying mechanism 600, the fiber felt 300 conveying mechanism is at least used for conveying the fiber felt 300 to the repairing space, the spraying mechanism 600 is at least used for spraying repairing material to the repairing space and the mouth 130 of the ladle 100, a lubrication mechanism is provided in the repairing space, the lubrication mechanism is at least used for providing lubrication between the repairing space and the fiber felt 300, the repairing body 200 is connected with a driving mechanism, and the driving mechanism is at least used for driving the repairing body 200 to move along the mouth 130 of the ladle 100.

[0040] In this embodiment, if Figure 1As described above, the ladle opening 130 of the ladle 100 is a circular structure with a large diameter. In order to better perform the repair, it needs to be repaired in sections. The repair body 200 is placed horizontally, and the ladle 100 is inverted so that the ladle opening 130 is vertically downward and opposite to the repair space 210, so that the ladle opening 130 of the ladle 100 to be repaired can be easily extended into the repair space 210. During the repair, the fiber felt 300 is first laid in the repair space 210 through the fiber felt 300 conveying mechanism, and then the area to be repaired of the ladle opening 130 is placed in the repair space 210. Then, the repair material is sprayed between the area to be repaired and the fiber felt 300 through the spraying mechanism 600. Due to the residual temperature of the ladle 100 itself, the repair material, the fiber felt 300 and the refractory material 110 of the ladle 100 are sintered together by the residual temperature of the ladle 100 to fill the damaged part of the ladle mouth 130, thereby completing the repair of the ladle mouth 130 of the ladle 100. After that, the maintenance body 200 is driven by the driving mechanism to move in a circle along the ladle mouth 130 of the ladle 100 to repair other positions of the ladle mouth 130 for segmented repair. In addition, before the fiber felt 300 is laid between the repair space 210, the lubricant is first sprayed into the repair space 210 through the lubrication mechanism, so that there is a lubrication effect between the fiber felt 300 and the repair space 210, so that after the fiber felt 300 and the refractory material 110 of the ladle 100 are sintered together, when the maintenance body 200 is moved to the next repair point, the fiber felt 300 is easily separated from the maintenance body 200, and the problem of the fiber felt 300 being torn and affecting the repair effect is effectively avoided due to the large friction between the fiber felt 300 and the maintenance body 200, which causes the fiber felt 300 to move when the maintenance body 200 moves, thereby causing the fiber felt 300 to tear.

[0041] In the above structure, a driving mechanism is provided to drive the maintenance body 200 to move along the ladle mouth 130 of the ladle 100, so that the ladle mouth 130 can be repaired in sections to achieve moving while repairing, and a spraying mechanism 600 and a fiber felt 300 conveying mechanism are provided, and the residual temperature of the ladle 100 is utilized to sinter the repair material and the fiber felt 300 with the refractory material 110 of the ladle 100, so as to complete the repair, which can effectively improve the repair efficiency, and can timely maintain and efficiently repair the ladle mouth 130 of the ladle 100, thereby increasing the service life of the ladle 100. In addition, the structure has a high degree of automation, reduces labor intensity and process costs, avoids safety and equipment hazards, and ensures safe, stable and smooth production.

[0042] In the specific structure of the maintenance body 200, as Figure 2 , 3As shown in Figures 4 and 5, 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 form a repair space 210. The first plate 220 is provided with a first repair end face at one end of the repair space 210, and the first repair end face is arranged opposite to the inner wall of the ladle 100. The second plate 230 is provided with a second repair end face at one end of the repair space 210, and the second repair end face is arranged opposite to the edge of the ladle opening 130 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 130 of the ladle 100.

[0043] In this embodiment, the repair body 200 includes a first plate body 220, a second plate body 230 and a third plate body 240, wherein the first plate body 220 and the third plate body 240 are arranged in a vertical direction, and the second plate body 230 is arranged in a horizontal direction. The second plate body 230 is connected between the first plate body 220 and the third plate body 240, and the second plate body 230 is placed at the lower ends of the first plate body 220 and the third plate body 240, so that the first plate body 220, the second plate body 230 and the third plate body 240 are surrounded by a U-shaped groove structure with an opening facing upward, and the U-shaped groove is a repair space 210, and the repair space 210 has an upward opening, so that it is convenient to place the part of the package mouth 130 to be repaired In the repair space 210, when the mouth 130 is placed in the repair space 210, the first plate body 220 is located on the inner side of the ladle 100, the second plate body 230 corresponds to the edge of the mouth 130 of the ladle 100, and the third plate body 240 is located on the outer side of the ladle 100, wherein a first repair end face is formed at one end of the first plate body 220 close to the inner wall of the ladle 100, thereby repairing the inner wall side of the ladle 100, and a second repair end face is formed at one end of the second plate body 230 close to the ladle 100, thereby repairing the edge of the mouth 130 of the ladle 100, and the third plate body 240 can limit the position of the ladle 100 to avoid the ladle 100 from being offset during repair.

[0044] In the above structure, by setting the first plate body 220 and the second plate body 230, the inner wall of the ladle 100 and the edge of the ladle opening 130 can be repaired at the same time, further improving the efficiency and effect of the repair. In addition, the first plate body 220, the second plate body 230 and the third plate body 240 are all arc structures with a curvature consistent with the ladle opening 130, wherein the first plate body 220, the second plate body 230 and the third plate body 240 of the first plate body 220 are all arc plate structures with a curvature consistent with the curvature of the ladle opening 130, wherein the inner diameter of the first plate body 220 is the same as the outer diameter of the ladle opening 130 of the ladle 100, so that when the maintenance body 200 moves, it is consistent in the circumferential direction of the ladle opening 130 of the ladle 100, thereby improving the wrapping of the maintenance body 200 on the ladle opening 130, thereby improving the stability during the repair and improving the repair effect.

[0045] In the specific structure of the fiber mat 300 conveying mechanism, 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 arranged on one side of the first plate body 220 so that the fiber felt 300 conveyed by the first conveying roller 410 fits with the first maintenance end face. The second conveying roller 420 is arranged on one side of the second plate body 230 so that the fiber felt 300 conveyed by the second conveying roller 420 fits with the second maintenance end face. The rotation speeds of the first conveying roller 410 and the second conveying roller 420 are consistent with the moving speed of the maintenance body 200.

[0046] In this embodiment, since there are the first maintenance end face and the second maintenance end face to repair the inner wall of the ladle 100 and the edge of the ladle mouth 130 respectively, in the fiber mat 300 conveying mechanism, the fiber mat 300 is conveyed to the first maintenance end face by the first conveying roller 410, and the fiber mat 300 is conveyed to the second maintenance end face by the second conveying roller 420, which can meet the needs of different maintenance end faces at the same time, wherein the first conveying roller 410 is arranged on the front end side of the first plate body 220 along the moving direction of the maintenance main body 200, and ... 0 is consistent with the vertical direction, that is, consistent with the height direction of the first plate body 220, so that the fiber felt 300 transported by the first conveying roller 410 can fit with the first maintenance 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 body 230 along the moving direction of the maintenance 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 body 230, so that the fiber felt 300 transported by the second conveying roller 420 can fit with the second maintenance end face.

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

[0048] In the specific structure of the lubrication mechanism, the lubrication mechanism includes a plurality of lubricant nozzles and a lubricant pipeline connected to the lubricant nozzles, the plurality of lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face, and the lubricant nozzles are used to at least spray the lubricant transported by the lubricant pipeline on the first maintenance end face and the fiber felt 300, and between the second maintenance end face and the fiber felt 300. The first maintenance end face and the second maintenance end face are both provided with lubrication holes, and the lubricant nozzles are arranged in the lubrication holes.

[0049] In this embodiment, a plurality of evenly distributed lubrication holes are provided on the first plate 220 and the second plate 230, wherein the lubrication holes may be through-hole structures, and lubricant nozzles are installed in the lubrication holes one by one, wherein the lubricant nozzles are arranged lower than the end faces of the first plate 220 and the second plate 230, that is, the lubricant nozzles do not protrude from the first maintenance end face and the second maintenance end face, while ensuring the lubrication effect between the first plate 220, the second plate 230 and the fiber felt 300, the fiber felt 300 is not affected to fit, and the fiber felt 300 is prevented from being misplaced when the maintenance body 200 is moved. A lubricant pipeline is connected to the tail end of the lubricant nozzle, so that the lubricant can be replenished in time to meet the needs of repair.

[0050] In the specific structure of the spraying mechanism 600, as shown in FIG. Figure 3 , 4 As shown, the material spraying mechanism 600 includes a material spraying port 610 and a repair material delivery pipeline connected to the material spraying port 610. The material spraying port 610 is arranged on one side of the repair space 210, and the material spraying port 610 and the material spraying direction are toward the repair space 210. The material spraying port 610 is at least used to spray the repair material delivered by the repair material delivery pipeline between the fiber felt 300 and the ladle opening 130 of the ladle 100. The material spraying mechanism 600 includes a support frame 620, one end of the support frame 620 is connected to the maintenance body 200, and the other end is provided with a fixing part, and the material spraying port 610 and at least part of the repair material delivery pipeline are fixedly connected to the fixing part.

[0051] In this embodiment, a spraying port 610 is provided at the front end of the maintenance body 200 along the moving direction, wherein the spraying port 610 faces the repairing space 210. When the portion to be repaired of the package opening 130 is placed in the repairing space 210, the spraying port 610 can spray the repairing material to the gap between the fiber felt 300 and the package opening 130, thereby sintering the repairing material with the fiber felt 300 and the refractory material 110 at the package opening 130 to complete the repairing work. In addition, by providing a support frame 620, the support effect of the spraying port 610 is improved, thereby improving the stability of the spraying of the spraying port 610, and avoiding the deviation of the spraying direction of the spraying port 610 due to vibration during the movement. In addition, a repairing material delivery pipeline is connected to the tail end of the spraying port 610, so that the repairing material can be replenished in time.

[0052] In addition, in the specific structure of the movement of the maintenance body 200, the driving mechanism includes a plurality of roller assemblies 510 arranged on the maintenance body 200, and the plurality of roller assemblies 510 are evenly distributed at the bottom of the maintenance body 200. The device includes a lifting mechanism, the lifting mechanism includes a base 710 and a lifting platform 720, the lifting platform 720 is movably connected with the base 710, and can be lifted and moved relative to the base 710, the maintenance body 200 is movably arranged on the lifting platform 720, and the maintenance body 200 can move along the opening 130 of the ladle 100 on the lifting platform 720. The lifting platform 720 is provided with an annular guide rail, the annular guide rail is coaxially arranged with the opening 130 of the ladle 100, and the roller assembly 510 is cooperatively connected with the annular guide rail, so that the maintenance body 200 moves along the opening 130 of the ladle 100.

[0053] In this embodiment, four roller assemblies 510 can be set at the bottom of the maintenance body 200, and the four roller assemblies 510 are respectively installed at the four corners of the maintenance body 200, so as to facilitate the movement of the maintenance body 200 while ensuring the movement stability of the maintenance body 200. In addition, the device is also provided with a lifting mechanism, the base 710 is fixed on the ground or on a platform, the lifting platform 720 is movably installed on the upper part of the base 710, and the lifting platform 720 can be moved up and down relative to the base 710 by a hydraulic lifting rod, and the maintenance body is installed on the lifting platform 720. After the ladle 100 is inverted so that the ladle mouth 130 is vertically downward, the lifting platform 720 drives the maintenance body to rise to the part to be repaired of the ladle mouth 130 and is placed in the repair space 210. After the repair is completed, the lifting platform 720 drives the maintenance body to descend, so that the maintenance body is separated from the ladle 100, further improving its automation and improving the repair efficiency. In addition, an annular guide rail is provided around the ladle opening 130 of the ladle 100 on the lifting platform 720, and 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 the movement stability.

[0054] See also Figure 5-Figure 7 The repair method using the above-mentioned repair device for the ladle mouth comprises the following steps:

[0055] S1. Lift the steel ladle 100 to be repaired to a position opposite to the maintenance body 200 , and rotate the steel ladle 100 so that the ladle opening 130 of the steel ladle 100 faces the repair space 210 .

[0056] In this step, if Figure 5 As shown, according to the corrosion condition of the ladle 100 and the production rhythm, it is determined whether the ladle 100 needs to be repaired. After the ladle 100 is poured in the continuous casting machine, the ladle 100 is hoisted and the residual slag in the ladle is dumped. The ladle 100 is hoisted to the ladle 100 maintenance platform, and the ladle 100 is rotated by the rotating support device on the platform to rotate the ladle 100 until the ladle mouth 130 is vertically downward.

[0057] S2 , starting the lubrication mechanism to spray lubricant into the repair space 210 , and starting 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 started 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 mat 300 conveying mechanism is started to pre-lay it on the first maintenance end surface and the second maintenance end surface.

[0059] S3, placing the area of ​​the ladle opening 130 of the ladle 100 to be repaired in the repair space 210. In this step, the lifting platform 720 is controlled to rise to drive the maintenance body 200 to the repair work position.

[0060] S4, start the material spraying mechanism 600, spray the repair material to the area between the fiber felt 300 and the ladle opening 130 to be repaired of the ladle 100, the maintenance body 200 is stationary relative to the ladle 100, and the fiber felt 300 conveying mechanism is closed, so that the maintenance body 200 sinter the fiber felt 300, the repair material and the refractory material 110 in the ladle 100 into one by the temperature of the ladle 100 itself. In S4, the maintenance body 200 is stationary relative to the ladle 100 for 1-3 minutes.

[0061] In this step, if Figure 6As shown, the spraying mechanism 600 can be started first to pre-spray the first plate 220 and the second plate 230 on which the fiber felt 300 is laid. The amount of spraying material is determined according to the situation of the eroded part to be repaired. When the part to be repaired of the ladle mouth 130 is placed in the repair space 210, the gap between the fiber felt 300 and the refractory material 110 of the ladle 100 continues to be sprayed. The sprayed repair material is sintered and solidified with the refractory material 110 of the ladle 100 under the residual temperature of the refractory material 110 of the ladle 100. Among them, during the sintering process, the maintenance body 200 is stationary relative to the ladle 100 for about 1-3 minutes, and it is adjusted accordingly depending on the amount of sprayed repair material to ensure that the sprayed repair material is non-liquid and sintered to shape. Avoid the situation where the maintenance body 200 collapses due to the incomplete sintering of the repair material after moving.

[0062] S5. Start the driving mechanism to drive the maintenance body 200 to move along the ladle mouth 130 of the ladle 100 to the next area to be repaired, and at the same time start the fiber felt 300 conveying mechanism to synchronously convey the fiber felt 300 to the repair space 210, and repeat step S4 to repair the next area to be repaired.

[0063] In this step, after the repaired part of the previous place is sintered, the driving mechanism is started to drive the maintenance body 200 to run along the circumferential track of the ladle mouth 130 of the steel ladle 100. At this time, the high temperature resistant fiber felt 300, the spraying repair material, and the refractory material 110 of the steel ladle 100 are sintered as one, and the first plate body 220, the second plate body 230 and the third plate body 240 are separated from the fiber felt 300 under the action of the lubricant and move relative to each other, and then the refractory material 110 is repaired. When the maintenance body 200 moves, the fiber felt 300 conveying mechanism starts to convey synchronously, and the conveying speed of the fiber felt 300 is consistent with the moving speed of the maintenance body 200, so that the fiber felt 300 and the refractory material 110 are kept relatively still. Because the fiber felt 300 and the refractory material 110 and the spraying repair material are sintered and bonded together, the lubricant is replenished in time when the maintenance body 200 moves, ensuring the separation of the first plate body 220, the second plate body 230 and the third plate body 240 from the fiber felt 300 and the lubrication of the relative movement.

[0064] S6, repeating steps S4 and S5 until the ladle opening 130 of the ladle 100 is repaired, and the ladle 100 is separated from the maintenance body 200. Figure 7As shown, the maintenance body 200 continues to run around the mouth 130 of the ladle 100, and simultaneously transports the fiber felt 300, sprays the repair material, and replenishes the lubricant. After the maintenance body 200 moves, the sprayed repair material, the fiber felt 300, and the refractory material 110 at the mouth 130 of the ladle are sintered as a whole, so as to repair the eroded part of the refractory material 110 at the mouth 130 of the ladle 100. When the eroded part is relatively light (less detachment of the refractory material 110 and small gap), the amount of sprayed repair material is small, the sintering is fast, and the moving speed of the maintenance body 200 is fast. On the contrary, when the gap is large, the amount of sprayed repair material is large, the sintering is slow, and the moving speed of the maintenance body 200 is slow. In short, it is required to fill the gap between the maintenance body 200 and the refractory material 110 at the mouth 130 when spraying the repair material. The amount of sprayed repair material is controlled by the spray port 610 and the vehicle speed of the maintenance body 200.

[0065] In addition, when the maintenance body 200 moves during the repair period, the back is filled with the sintered parts for repair, which has a certain blocking effect on the front sprinkler repair material, which is conducive to the extrusion and filling of the later sprinkler material, and ensures the sprinkler repair effect. After the maintenance body 200 moves in a circle, the repair material sprinkler system and the repair vehicle drive are turned off. Then the lifting platform 720 is lowered to the non-working position, the repair work of the ladle mouth 130 of the ladle 100 is completed, and normal packaging operations (changing the slide plate, water outlet, cleaning the air permeable brick residue, filling sand, etc.) are carried out.

[0066] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ladle mouth repair device, characterized in that: It includes a maintenance body, which is provided with a repair space for accommodating at least part of the ladle mouth, the maintenance body is connected with a fiber felt conveying mechanism and a spraying mechanism, the fiber felt conveying mechanism is at least used for conveying fiber felt to the repair space, the spraying mechanism is at least used for spraying repair material to the repair space and the ladle mouth, a lubrication mechanism is provided in the repair space, the lubrication mechanism is at least used for providing lubrication between the repair space and the fiber felt, and the maintenance body is connected with a driving mechanism, the driving mechanism is at least used for driving the maintenance body to move along the ladle mouth.

2. A ladle mouth repair device according to claim 1, characterized in that: The repair body comprises a first plate body, a second plate body and a third plate body connected in sequence, the first plate body, the second plate body and the third plate body enclose a U-shaped groove to form the repair space, the first plate body is provided with a first repair end face at one end of the repair space, the first repair end face is arranged opposite to the inner wall of the ladle, the second plate body is provided with a second repair end face at one end of the repair space, the second repair end face is arranged opposite to the edge of the ladle mouth; And / or, the first plate body, the second plate body and the third plate body are all arc-shaped structures, and the curvature of the first plate body, the second plate body and the third plate body is consistent with the curvature of the ladle opening.

3. A ladle mouth repair device 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 arranged on one side of the first plate body so that the fiber felt conveyed by the first conveying roller fits with the first maintenance end face. The second conveying roller is arranged on one side of the second plate body so that the fiber felt conveyed by the second conveying roller fits with the second maintenance end face. The rotation speeds of the first conveying roller and the second conveying roller are consistent with the moving speed of the maintenance body.

4. A ladle mouth repair device according to claim 3, characterized in that: The lubricating mechanism comprises a plurality of lubricant nozzles and a lubricant pipeline connected to the lubricant nozzles, wherein the plurality of lubricant nozzles are evenly distributed on the first maintenance end face and the second maintenance end face, and the lubricant nozzles are used to at least spray the lubricant transported by the lubricant pipeline on the first maintenance end face and the fiber felt, and between the second maintenance end face and the fiber felt; And / or, the first maintenance end surface and the second maintenance end surface are both provided with lubrication holes, and the lubricant nozzle is arranged in the lubrication holes.

5. The ladle mouth repair device according to claim 3, characterized in that: The material spraying mechanism comprises a material spraying port and a repair material conveying pipeline connected to the material spraying port, the material spraying port is arranged at one side of the repair space, and the material spraying port and the material spraying direction are toward the repair space, and the material spraying port is at least used to spray the repair material conveyed by the repair material conveying pipeline between the fiber felt and the ladle opening of the ladle; And / or, the spraying mechanism comprises a support frame, one end of the support frame is connected to the maintenance body, and the other end is provided with a fixing part, and the spraying port and at least part of the repair material conveying pipeline are fixedly connected to the fixing part.

6. The ladle mouth repair device according to claim 1, characterized in that: The driving mechanism comprises a plurality of roller assemblies arranged on the maintenance body, and the plurality of roller assemblies are evenly distributed on the bottom of the maintenance body.

7. A ladle mouth repairing device according to claim 6, characterized in that: It includes a lifting mechanism, which includes a base and a lifting platform. The lifting platform is movably connected to the base and can be lifted and lowered relative to the base. The maintenance body is movably arranged on the lifting platform, and the maintenance body can move along the ladle mouth on the lifting platform.

8. A ladle mouth repairing device according to claim 7, characterized in that: The lifting platform is provided with an annular guide rail, which is coaxially arranged with the opening of the ladle, and the roller assembly is cooperatively connected with the annular guide rail, so that the maintenance body moves along the opening of the ladle.

9. A repair method based on the ladle mouth repair device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, hoisting the steel ladle to be repaired to a position opposite to the maintenance body, and rotating the steel ladle so that the ladle opening faces the repair space; S2, starting the lubrication mechanism to spray lubricant into the repair space, and starting the fiber mat conveying mechanism to lay the fiber mat in the repair space; S3, placing the area of ​​the ladle opening to be repaired in the repair space; S4, starting the spraying mechanism to spray the repair material between the fiber felt and the ladle opening to be repaired area, the maintenance body is stationary relative to the ladle, and the fiber felt conveying mechanism is closed, so that the maintenance body sintering the fiber felt, the repair material and the refractory material in the ladle into one by the temperature of the ladle itself; S5, starting the driving mechanism to drive the maintenance body to move along the ladle opening to the next area to be repaired, and simultaneously starting the fiber mat conveying mechanism to synchronously convey the fiber mat to the repair space, and repeating step S4 to repair the next area to be repaired; S6. Repeat steps S4 and S5 until the ladle opening is repaired and the ladle is separated from the maintenance 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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