Refractory material repairing device and method for ladle mouth of steel ladle

Abstract

The steel ladle opening refractory material repairing device comprises a repairing device body, the repairing device body comprises a chassis, a plurality of lifting supporting legs are arranged in the peripheral direction of the chassis, an outer retaining wall is arranged on the upper portion of the chassis, an inner retaining wall is arranged on the inner side of the outer retaining wall, and a repairing groove is formed between the outer retaining wall and the inner retaining wall. An opening of the steel ladle is inversely buckled in the repairing groove; the device further comprises a sprinkling irrigation system, the sprinkling irrigation system comprises a feeding pipe, one end of the feeding pipe is connected with an air source pipe, a water source pipe and a repairing material pipe, a plurality of spraying pipes are arranged at the other end of the feeding pipe, the upper ends of the spraying pipes sequentially penetrate through the base plate and the inner retaining wall, and spraying openings of the spraying pipes face the outer retaining wall. According to the method, efficient and rapid maintenance and repair of the corrosion refractory in the ladle mouth area of the steel ladle are achieved, completeness and good shape of the ladle mouth refractory are guaranteed, the labor intensity of manual maintenance is reduced, the maintenance and repair efficiency is improved, the service life of the steel ladle is remarkably prolonged, and the production efficiency of the steel ladle is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the field of steelmaking, and in particular relates to a ladle mouth refractory material repairing device and a repairing method. Background Art

[0002] In the steelmaking process, the ladle is a key equipment connecting the converter and the casting process, and is responsible for receiving high-temperature molten steel, refining outside the furnace, and casting molten steel. Since the inside of the ladle is exposed to extremely high temperatures for a long time, and needs to withstand chemical erosion and mechanical scouring of molten steel and slag, as well as possible additional stress caused by argon blowing, stirring, and secondary refining processes, the durability of its lining material has become a key factor in ensuring production continuity and safety.

[0003] The ladle lining is usually composed of multiple layers of refractory bricks of different materials to adapt to the specific erosion conditions faced by different areas. For example, the slag line area is in direct contact with high-temperature slag. The magnesia carbon bricks used in this area are easily oxidized and lost at high temperatures, resulting in the destruction of the brick structure. This is one of the areas with the most serious damage to the lining. In contrast, although the ladle wall and bottom are also subject to high-temperature erosion, they are mainly subjected to the scouring and wear of molten steel, and their damage mechanism is relatively simple and the degree is relatively mild. In particular, the bottom of the ladle is subjected to strong mechanical impact and scouring when receiving molten steel, and is easily peeled off from the interface of the metamorphic layer.

[0004] As time goes by, the ladle mouth, especially the ladle edge, changes from being smooth in the early stage to cracks and fissures in the middle stage. These cracks not only provide attachment points for slag, but also allow molten steel and slag to easily penetrate, accelerating the overall erosion of the ladle mouth. Especially during the refining process, when the slag interface rises to the vicinity of the ladle edge, the chemical reaction and physical scouring between the slag and the ladle edge material further aggravate the abnormal erosion of the ladle edge, resulting in a surge in the slag sticking rate, and may even cause leakage at the slag line, seriously threatening production safety.

[0005] In addition, abnormal erosion during ladle turnover can also lead to the exposure of the internal steel brick pressing plate. The brick pressing plate without the protection of the refractory layer will quickly oxidize and melt, increasing the maintenance burden after the production line, and increasing the manpower and material costs. More seriously, when the ladle mouth is seriously sticky, it will interfere with the normal lifting and lowering operation of the vacuum insertion tube, forcing the operator to use an anchor hook for cleaning. This process is very likely to cause additional damage to the annular seam or slag line bricks, further affecting production efficiency and rhythm. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a ladle mouth refractory repair device and a ladle mouth refractory repair method, which realizes efficient and rapid maintenance and repair of damaged refractory materials in the ladle mouth area, ensures the integrity and good shape of the ladle mouth refractory materials, reduces the labor intensity of manual maintenance, improves the maintenance and repair efficiency, and significantly improves the service life and production efficiency of the ladle.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A refractory repair device for the mouth of a ladle comprises a repair device body, the repair device body comprises a chassis, a plurality of lifting legs are arranged in the outer peripheral direction of the chassis, an outer retaining wall is arranged on the upper part of the chassis, the inner wall of the outer retaining wall is fitted with the outer wall of the ladle, an inner retaining wall is arranged on the inner side of the outer retaining wall, the outer wall of the inner retaining wall corresponds to the design size of the refractory layer lining the ladle, a repair groove is formed between the outer retaining wall and the inner retaining wall, the mouth of the ladle is inverted in the repair groove; and also comprises a sprinkler system, the sprinkler system comprises a feed pipe, one end of the feed pipe is connected to an air source pipe, a water source pipe and a repair material pipe (not shown in the figure), the other end of the feed pipe is provided with a plurality of spray pipes, the upper ends of the spray pipes pass through the chassis and the inner retaining wall in sequence, and the spraying ports of the spray pipes face the outer retaining wall.

[0009] Furthermore, the chassis is provided with a plurality of hot gas inlets for the inner cavity of the ladle, the hot gas inlets for the inner cavity of the ladle are located inside the inner retaining wall, a hot gas annular channel is provided inside the chassis, the hot gas inlet for the inner cavity of the ladle is connected with the hot gas annular channel through a transition pipe, and a hot gas outlet for the inner cavity of the ladle is provided on the outer wall of the chassis, one end of the hot gas outlet for the inner cavity of the ladle is connected with the hot gas annular channel, and the other end is connected with an exhaust fan (not shown in the figure). The hot gas in the inner cavity of the ladle enters the hot gas annular channel from the hot gas inlet of the inner cavity of the ladle through the transition pipe, and is finally discharged from the hot gas outlet of the inner cavity of the ladle. When the hot gas flows through the hot gas annular channel, the chassis is heated, which accelerates the sintering and solidification of the repair material.

[0010] Furthermore, the hot air annular channel is located at the lower part of the repair groove, which ensures the sintering and solidification effect of the repair material.

[0011] Furthermore, it also includes a three-dimensional scanner (not shown in the figure). Before the ladle mouth is repaired, the three-dimensional scanner is placed at the center of the chassis; the sprinkler system also includes a distributor, the distributor includes a distribution bin and an upper cover installed on the upper part of the distribution bin, the upper end of the feed pipe is connected to the distribution bin, and a number of branch pipes are connected to the side wall of the distribution bin. The branch pipes are provided with a number of solenoid valves, and the other end of the solenoid valve is connected to the spray pipe; the three-dimensional scanner evaluates and judges the corrosion status of the ladle mouth refractory material according to the design size of the ladle lining refractory layer, and performs restoration calculations at each position segment of the ladle mouth circumference to calculate the total amount of sprinkler repair material, and controls the opening size of each spray pipe through the control system to realize the distribution of repair material in different parts.

[0012] Furthermore, the lifting legs include but are not limited to a combination of one or more of a hydraulic cylinder, a pneumatic cylinder, an electric push rod or a scissor-type lifting mechanism.

[0013] The present invention also provides a method for repairing a refractory material at a ladle opening, comprising the following steps:

[0014] Step 1: Determine whether ladle repair is necessary based on the ladle corrosion condition and production rhythm;

[0015] Step 2: When the ladle needs to be repaired, the ladle is poured in the continuous casting machine, and the ladle is hoisted by a crane to pour out the remaining slag in the ladle;

[0016] Step 3: Lift the ladle to the ladle repair platform, drive the ladle ear axis to rotate the ladle until the ladle mouth is facing downward through the bracket on the platform, and then place the main body of the repair device directly under the ladle; place the 3D scanner at the center of the chassis, use the lifting legs to drive the 3D scanner to rise and fall along the ladle mouth, and use the 3D scanner to scan and detect the current status of the refractory material corrosion at the ladle mouth in the circumferential direction (compare the corrosion degree of each section of the refractory material with the original design size), calculate the total amount of sprinkler repair material, control the opening size of each spray pipe through the control system, and distribute the amount of repair material to different parts;

[0017] Step 4: Slowly start the lifting legs, lift the main body of the repair device to the lower limit (that is, the spray port of the spray pipe is flush with the edge of the ladle), then open the sprinkler system (open the air source, water source, and repair material source in turn), and the repair material (mixed material) is sprayed from the feed pipe through the distributor, branch pipe, and spray pipe to the gap between the inner wall of the repair groove and the refractory material of the ladle. The lifting legs lift the main body of the repair device again, so that the repair material is poured and filled layer by layer from bottom to top; the amount of repair material for each branch pipe is adjusted and distributed by the distributor according to the scanning and detection results of the 3D scanner. The more refractory corrosion there is in an area, the more sprinkler material is allocated to the branch pipe.

[0018] Step 5: Turn on the exhaust fan at the hot gas outlet of the ladle cavity. The hot gas in the ladle cavity enters the hot gas annular channel from the hot gas inlet of the ladle cavity through the transition pipe, and is finally discharged from the hot gas outlet of the ladle cavity. When the hot gas flows through the hot gas annular channel, it heats the repair material at the bottom of the upper repair groove, thereby accelerating the sintering and solidification of the repair material.

[0019] Step 6: After the repair material is sprinkled, turn off the sprinkler system. After 3-5 minutes, the repair material is sintered and solidified under the heat of the refractory material at the ladle mouth. Then control the lifting legs to lower the repair device, separate the ladle from the repair groove, and complete the repair of the ladle mouth. After the repair is completed, perform normal packaging operations (changing the slide plate, water inlet, cleaning the air brick residue, filling sand, etc.).

[0020] Furthermore, in step four, ramming material is first coated on the damaged part of the refractory material at the lower part of the ladle mouth. Since the ramming material has low moisture content and lower viscosity than the repair material, and has a short sintering time, it ensures that the ramming material and the refractory material at the ladle mouth it contacts quickly and prevents the repair material from overflowing.

[0021] Furthermore, in step four, before repairing the ladle mouth, anti-stick coating is sprayed on the repair groove in advance, and then a layer of high-temperature resistant fiber felt is laid on the inner wall of the outer retaining wall and the outer wall of the inner retaining wall, and then the repair operation of the refractory material of the ladle mouth is carried out. The role of the anti-stick coating and the high-temperature resistant fiber felt is to prevent the repair groove and the repair material from sticking and sintering together, thereby improving the separation effect of the two; note that the anti-stick coating and the high-temperature resistant fiber felt should be left out at the outlet of the spray pipe to prevent the outlet of the spray pipe from being blocked.

[0022] The beneficial effects of the present invention are:

[0023] 1) The ladle mouth refractory repair device of the present invention realizes the efficient and rapid maintenance and repair of the corroded refractory in the ladle mouth area, ensures the integrity and good shape of the ladle mouth refractory, reduces the labor intensity of manual maintenance, improves the maintenance and repair efficiency, and significantly improves the service life and production efficiency of the ladle.

[0024] 2) A hot gas inlet for the inner cavity of the ladle is arranged on the chassis, and a hot gas annular channel is arranged inside the chassis. A hot gas outlet for the inner cavity of the ladle is arranged on the outer wall of the chassis, and the hot gas outlet for the inner cavity of the ladle is connected to the exhaust fan. The hot gas in the inner cavity of the ladle enters the hot gas annular channel from the hot gas inlet of the inner cavity of the ladle through the transition pipe, and is finally discharged from the hot gas outlet of the inner cavity of the ladle. When the hot gas flows through the hot gas annular channel, the chassis is heated, which accelerates the sintering and solidification of the repair material.

[0025] 3) A three-dimensional scanner and a material distributor are set up. The three-dimensional scanner evaluates and judges the corrosion status of the refractory material at the ladle mouth according to the design dimensions of the refractory layer of the ladle lining, and performs restoration calculations at each position segment of the circumference of the ladle mouth to calculate the total amount of sprinkler repair material. The opening size of each spray pipe is controlled by the control system to achieve the distribution of repair material in different parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 This is a usage status diagram of a refractory material repair device for a ladle mouth according to the present invention.

[0027] Attached Figure 2 It is a schematic diagram of the main body of a repair device in a refractory material repair device for a ladle mouth of the present invention.

[0028] Attached Figure 3 It is a partial cross-sectional view of the main body of a repair device in a refractory repair device for a ladle mouth of the present invention.

[0029] Attached Figure 4It is a schematic diagram of a distributor in a refractory repair device for a ladle mouth according to the present invention after a cover plate is removed.

[0030] Attached Figure 5 It is a schematic diagram of the lower limit of a refractory repair device for a ladle mouth during repair according to the present invention.

[0031] Attached Figure 6 It is a schematic diagram of the upper limit during repair of a refractory material repair device for a ladle mouth of the present invention.

[0032] In the figure, 1, ladle; 11, refractory layer of ladle lining; 12, ladle ear shaft; 2, repair device body; 21, chassis; 211, hot gas inlet of ladle inner cavity; 212, transition pipe; 22, outer retaining wall; 23, inner retaining wall; 24, repair groove; 25, lifting legs; 26, hot gas annular channel; 261, hot gas outlet of ladle inner cavity; 27, distributor; 271, feed pipe; 272, distributor bin; 273, solenoid valve; 274, spray pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the attached Figure 1-Figure 6 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] A ladle mouth refractory repair device, comprising a repair device body 2, the repair device body 2 comprising a chassis 21, the chassis 21 is provided with a plurality of lifting legs 25 in the outer peripheral direction, an outer retaining wall 22 is provided on the upper part of the chassis 21, the inner wall of the outer retaining wall 22 is in contact with the outer wall of the ladle 1, an inner retaining wall 23 is provided on the inner side of the outer retaining wall 22, the outer wall of the inner retaining wall 23 corresponds to the design size of the ladle lining refractory layer 11, the outer retaining wall 22 and the inner retaining wall 23 are provided with a plurality of lifting legs 25, and the outer retaining wall 22 and the inner retaining wall 23 are provided with a plurality of lifting legs 25. 3, a repair groove 24 is formed between the ladle and the inner retaining wall 23, and the ladle mouth is inverted in the repair groove 24; it also includes a sprinkler system, which includes a feed pipe 271, one end of which is connected to an air source pipe, a water source pipe and a repair material pipe (not shown in the figure), and the other end of the feed pipe 271 is provided with a plurality of spray pipes 274, the upper ends of which pass through the chassis 21 and the inner retaining wall 23 in sequence, and the spray ports of the spray pipes 274 face the outer retaining wall 22.

[0036] Furthermore, the chassis 21 is provided with a plurality of ladle inner cavity hot gas inlets 211, the ladle inner cavity hot gas inlets 211 are located inside the inner retaining wall 23, the chassis 21 is provided with a hot gas annular channel 26, the ladle inner cavity hot gas inlets 211 are connected with the hot gas annular channel 26 through a transition pipe 212, and the outer wall of the chassis 21 is provided with a ladle inner cavity hot gas outlet 261, one end of the ladle inner cavity hot gas outlet 261 is connected with the hot gas annular channel 26, and the other end is connected with the exhaust fan (not shown in the figure). The hot gas in the inner cavity of the ladle 1 enters the hot gas annular channel 26 from the ladle inner cavity hot gas inlet 211 through the transition pipe 212, and is finally discharged from the ladle inner cavity hot gas outlet 261. When the hot gas flows through the hot gas annular channel 26, the chassis 21 is heated and the sintering and solidification of the repair material is accelerated.

[0037] Furthermore, the hot gas annular channel 26 is located at the lower part of the repair groove 24, which ensures the sintering and solidification effect of the repair material.

[0038] Furthermore, it also includes a three-dimensional scanner (not shown in the figure). Before the ladle mouth is repaired, the three-dimensional scanner is placed at the center of the chassis 21; the sprinkler system also includes a distributor 27, the distributor 27 includes a distribution bin 272 and an upper cover installed on the upper part of the distribution bin 272, the upper end of the feed pipe 271 is connected to the distribution bin 272, and a number of branch pipes are connected to the side wall of the distribution bin 272. The branch pipes are provided with a number of solenoid valves 273, and the other end of the solenoid valve 273 is connected to the spray pipe 274; the three-dimensional scanner evaluates and judges the corrosion status of the ladle mouth refractory material according to the design dimensions of the ladle lining refractory layer 11, and performs restoration calculations at each position segment of the ladle mouth circumference, so as to calculate the total amount of sprinkler repair material, and control the opening size of each spray pipe 274 through the control system to realize the distribution of repair material in different parts.

[0039] Furthermore, the lifting legs 25 include but are not limited to a combination of one or more of a hydraulic cylinder, a pneumatic cylinder, an electric push rod or a scissor-type lifting mechanism.

[0040] The present invention also provides a method for repairing a refractory material at a ladle opening, comprising the following steps:

[0041] Step 1: Determine whether ladle repair is necessary based on the ladle corrosion condition and production rhythm;

[0042] Step 2: When the ladle needs to be repaired, after the continuous casting machine has finished pouring, the ladle is hoisted by a crane to dump the remaining slag in the ladle;

[0043] Step 3: hoist the ladle 1 to the ladle repair platform, drive the ladle ear shaft 12 through the bracket on the platform to rotate the ladle until the ladle mouth is downward, and then place the repair device body 2 directly under the ladle 1; place the three-dimensional scanner at the center of the chassis 21, use the lifting legs 25 to drive the three-dimensional scanner to rise and fall along the ladle mouth, use the three-dimensional scanner to scan and detect the current status of the ladle mouth refractory material corrosion in the circumferential direction in sequence (compare the corrosion degree of each section of the refractory material with the original design size), calculate the total amount of sprinkler repair material, control the opening size of each spray pipe 274 through the control system, and distribute the amount of repair material to different parts;

[0044] Step 4: Slowly start the lifting legs 25, lift the repair device body 2 to the lower limit (that is, the spray port of the spray pipe 274 is flush with the edge of the ladle), and then open the sprinkler system (open the air source, water source, and repair material source in turn), and the repair material (mixed material) is sprayed from the feed pipe 271 through the distributor 27, the branch pipe, and the spray pipe 274 to the gap between the inner wall of the repair groove 24 and the refractory material of the ladle. The lifting legs 25 lift the repair device body 2 again, so that the repair material is poured and filled layer by layer from bottom to top; the amount of repair material for each branch pipe is adjusted and distributed by the distributor based on the scanning and detection results of the three-dimensional scanner. The more refractory material is corroded in an area, the more sprinkler material is allocated to the branch pipe.

[0045] Step 5: Turn on the exhaust fan at the hot gas outlet 261 of the ladle cavity. The hot gas in the ladle cavity 1 enters the hot gas annular channel 26 from the hot gas inlet 211 of the ladle cavity through the transition pipe 212, and is finally discharged from the hot gas outlet 261 of the ladle cavity. When the hot gas flows through the hot gas annular channel 26, it heats the repair material at the bottom of the upper repair groove 24, thereby accelerating the sintering and solidification of the repair material.

[0046] Step 6: After the repair material is sprinkled, turn off the sprinkler system. After 3-5 minutes, the repair material is sintered and solidified under the action of the heat of the refractory material at the ladle mouth. Then the lifting legs 25 are controlled to lower the repair device, and the ladle 1 is separated from the repair groove 24, completing the repair of the ladle mouth. After the repair is completed, perform normal packaging operations (changing the slide plate, water inlet, cleaning the air brick residue, filling sand, etc.).

[0047] Furthermore, in step four, ramming material is first coated on the damaged part of the refractory material at the lower part of the ladle mouth. Since the ramming material has low moisture content and lower viscosity than the repair material, and has a short sintering time, it ensures that the ramming material and the refractory material at the ladle mouth it contacts quickly and prevents the repair material from overflowing.

[0048] Furthermore, in step four, before repairing the ladle mouth, anti-stick coating is sprayed on the repair groove 24 in advance, and then a layer of high-temperature resistant fiber felt is laid on the inner wall of the outer retaining wall 22 and the outer wall of the inner retaining wall 23, and then the repair operation of the refractory material of the ladle mouth is carried out. The role of the anti-stick coating and the high-temperature resistant fiber felt is to prevent the repair groove 24 and the repair material from sticking and sintering together, thereby improving the separation effect of the two; note that the anti-stick coating and the high-temperature resistant fiber felt should be left out at the outlet of the spray pipe 274 to prevent the outlet of the spray pipe 274 from being blocked.

[0049] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A ladle mouth refractory repair device, comprising a repair device body, characterized in that: The main body of the repair device includes a chassis, a plurality of lifting legs are provided in the outer peripheral direction of the chassis, an outer baffle wall is provided on the upper part of the chassis, the inner wall of the outer baffle wall is fitted with the outer wall of the ladle, an inner baffle wall is provided on the inner side of the outer baffle wall, the outer wall of the inner baffle wall corresponds to the design size of the refractory layer lining the ladle, a repair groove is formed between the outer baffle wall and the inner baffle wall, and the ladle mouth is inverted in the repair groove; it also includes a sprinkler system, the sprinkler system includes a feed pipe, one end of the feed pipe is connected to the air source pipe, the water source pipe and the repair material pipe, the other end of the feed pipe is provided with a plurality of spray pipes, the upper ends of the spray pipes pass through the chassis and the inner baffle wall in sequence, and the spraying port of the spray pipe faces the outer baffle wall.

2. A ladle mouth refractory repair device according to claim 1, characterized in that: The chassis is provided with a plurality of hot gas inlets for the inner cavity of the ladle, the hot gas inlets for the inner cavity of the ladle are located inside the inner retaining wall, a hot gas annular channel is provided inside the chassis, the hot gas inlet for the inner cavity of the ladle is connected with the hot gas annular channel through a transition pipe, and a hot gas outlet for the inner cavity of the ladle is provided on the outer wall of the chassis, one end of the hot gas outlet for the inner cavity of the ladle is connected with the hot gas annular channel, and the other end is connected with the exhaust fan.

3. A ladle mouth refractory repair device according to claim 2, characterized in that: The hot gas annular channel is located at the lower part of the repair groove.

4. A ladle mouth refractory repair device according to claim 2, characterized in that: It also includes a three-dimensional scanner. Before the ladle mouth is repaired, the three-dimensional scanner is placed at the center of the chassis; the sprinkler system also includes a distributor, the distributor includes a distribution bin and an upper cover installed on the upper part of the distribution bin, the upper end of the feed pipe is connected to the distribution bin, and a plurality of branch pipes are connected to the side wall of the distribution bin. A plurality of solenoid valves are provided on the branch pipes, and the other end of the solenoid valve is connected to the spray pipe.

5. A ladle mouth refractory repair device according to any one of claims 1 to 4, characterized in that: The lifting legs include but are not limited to a combination of one or more of a hydraulic cylinder, a pneumatic cylinder, an electric push rod or a scissor-type lifting mechanism.

6. A method for repairing refractory material at the mouth of a steel ladle, characterized in that: The following steps are involved: Step 1: Determine whether ladle repair is necessary based on the ladle corrosion condition and production rhythm; Step 2: When the ladle needs to be repaired, the ladle is poured in the continuous casting machine, and the ladle is hoisted by a crane to pour out the remaining slag in the ladle; Step 3: lift the ladle to the ladle repair platform, drive the ladle ear axis to rotate the ladle until the ladle mouth is facing downward through the bracket on the platform, and then place the main body of the repair device described in claim 4 directly under the ladle; place the three-dimensional scanner at the center of the chassis, use the lifting legs to drive the three-dimensional scanner to rise and fall along the ladle mouth, and use the three-dimensional scanner to scan and detect the current status of the refractory material corrosion at the ladle mouth in a circular direction (compare the degree of refractory corrosion of each section with the original design size), calculate the total amount of sprinkler repair material, control the opening size of each spray pipe through the control system, and distribute the amount of repair material to different parts; Step 4: Slowly start the lifting legs, lift the main body of the repair device to the lower limit (i.e. the spray port of the spray pipe is flush with the edge of the ladle), then open the sprinkler system (turn on the air source, water source, and repair material source in sequence), and the repair material (mixed material) is sprayed from the feed pipe through the distributor, branch pipe, and spray pipe to the gap between the inner wall of the repair groove and the refractory material of the ladle. The lifting legs lift the main body of the repair device again, so that the repair material is poured and filled layer by layer from bottom to top; the amount of repair material for each branch pipe is adjusted and distributed by the distributor according to the scanning and detection results of the 3D scanner. The more refractory corrosion is in the area, the more sprinkler material is distributed to the branch pipe; Step 5: Turn on the exhaust fan at the hot gas outlet of the ladle cavity. The hot gas in the ladle cavity enters the hot gas annular channel from the hot gas inlet of the ladle cavity through the transition pipe and is finally discharged from the hot gas outlet of the ladle cavity. When the hot gas flows through the hot gas annular channel, it heats the repair material at the bottom of the upper repair groove, thereby accelerating the sintering and solidification of the repair material. Step 6: After the repair material is sprinkled, turn off the sprinkler system. After 3-5 minutes, the repair material is sintered and solidified under the heat of the refractory material at the ladle mouth. Then control the lifting legs to lower the repair device, separate the ladle from the repair groove, and complete the repair of the ladle mouth. After the repair is completed, perform normal packaging operations (changing the slide plate, water inlet, cleaning the air brick residue, filling sand, etc.).

7. A method for repairing refractory material at the mouth of a ladle according to claim 6, characterized in that: In step four, ramming material is first applied to the damaged part of the refractory material at the bottom of the ladle mouth. Since the ramming material has low moisture content and lower viscosity than the repair material, the sintering time is short, which ensures that the ramming material and the refractory material at the ladle mouth in contact are quickly bonded to prevent the repair material from overflowing.

8. A method for repairing refractory material at the mouth of a ladle according to claim 6, characterized in that: In step 4, before repairing the ladle mouth, spray the repair groove with anti-stick coating in advance, and then lay a layer of high-temperature resistant fiber felt on the inner wall of the outer retaining wall and the outer wall of the inner retaining wall, and then carry out the repair operation of the refractory material of the ladle mouth. The role of the anti-stick coating and the high-temperature resistant fiber felt is to prevent the repair groove and the repair material from sticking and sintering together, and improve the separation effect of the two; note that the anti-stick coating and the high-temperature resistant fiber felt should be left out of the spray pipe outlet to prevent the spray pipe outlet from being blocked.

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