Refractory material repairing device and method for tapping hole of converter

Abstract

The invention discloses a converter tapping hole refractory material repairing device and method, the converter tapping hole refractory material repairing device comprises a form supporting system and a gunning system, the form supporting system comprises a first supporting positioning trolley, a first mechanical arm is arranged at the upper end of a first telescopic column, and a ceramic sleeve is arranged at one end of the first mechanical arm; the gunning system comprises a blender, a gunning compressed air pipe, a gunning water source pipe and a gunning material pipe are arranged on one side of the blender, a gunning material conveying pipe is arranged on the other side of the blender, one end of the gunning material conveying pipe is connected with a spraying pipe, and a spraying opening of the spraying pipe is aligned to a gap between the steel tapping hole refractory and the ceramic sleeve. The shape supporting system is used for supporting the designed hole pattern state of the tapping hole, the gunning system is used for evenly spraying the gunning material into the gap between the refractory material of the tapping hole and the ceramic sleeve, the hole pattern state of the eroded converter tapping hole is repaired, the slag-steel separation function effect of the tapping hole is guaranteed, and the service life of the converter tapping hole is prolonged. The service life of the refractory material of the tapping hole is prolonged.

Description

Technical Field

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

[0002] In the steelmaking process, the converter taphole plays a vital role as the only channel for molten steel to flow from the converter to the ladle. It not only ensures the effective separation of slag, but also promotes the floating of inclusions and deoxidation products through the strong stirring effect of the steel flow on the molten steel in the ladle, significantly reducing the risk of molten steel contamination caused by slag flowing into the ladle, thereby improving the utilization rate of alloy elements and ensuring the quality and production efficiency of steel products. However, the working environment of the taphole is extremely harsh, and it needs to continuously withstand multiple tests such as friction erosion and oxidation erosion between high-temperature molten steel and slag. These factors work together on the refractory materials (referred to as refractory materials) of the taphole, greatly shortening its service life.

[0003] Specifically, the damage mechanism of the taphole mainly includes the following aspects:

[0004] 1. Oxidation erosion by furnace gas: From the time the molten iron is loaded into the converter to the end of blowing, the tapping port is always exposed to a high-temperature oxidizing atmosphere. The CO-rich furnace gas generated during the blowing process reacts violently with the refractory at the tapping port, resulting in the formation of a decarburized layer on the surface of the refractory, which accelerates the erosion process of the tapping port.

[0005] 2. Friction and scouring of molten steel and slag: During the steel-making stage, the tapping port not only has to withstand the huge pressure from the molten steel inside the converter, but also has to deal with the strong friction and scouring of the inner wall by the molten steel and slag during the outflow process. This physical wear directly leads to the damage of the inner wall structure of the tapping port.

[0006] 3. High temperature melting effect: The tapping temperature of the converter is usually as high as 1630-1700℃. Under such extremely high temperature conditions, the refractory material at the tapping port is prone to softening, the material strength drops significantly, and even partial melting occurs, further aggravating the damage to the tapping port.

[0007] As time goes by, the refractory material of the tapping hole gradually deteriorates due to continuous scouring and oxidation erosion, especially the upper area of ​​the tapping hole, which often deforms and expands due to wear, forming a funnel-shaped inverted cone structure with a large top and a small bottom. This change is particularly significant in the later stage of tapping, resulting in an increase in the converging vortex, increasing the risk of slag being drawn into the molten steel, destroying the "slag-steel separation" effect, and ultimately having an adverse effect on the quality of the molten steel. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a device and method for repairing refractory materials at a converter tapping port, so as to repair the corroded hole state of the converter tapping port, ensure the functional effect of "slag-steel separation" at the tapping port, increase the life of the refractory materials at the tapping port, and ensure safe, stable and smooth production.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A device for repairing refractory materials at a steel outlet of a converter comprises a morphological support system and a spraying system, wherein the morphological support system comprises a first supporting and positioning trolley, a first fixed column is provided on the upper part of the first supporting and positioning trolley, a first hydraulic cylinder is installed inside the first fixed column, a first telescopic column is connected to the top of the piston rod of the first hydraulic cylinder, the lower end of the first telescopic column is slidably installed inside the first fixed column, a first mechanical arm is provided on the upper end of the first telescopic column, a counterweight is provided at one end of the first mechanical arm, a ceramic sleeve is provided at the other end of the first mechanical arm, and the outer diameter of the ceramic sleeve is the same as the designed inner diameter of the steel outlet sleeve brick; the spraying system comprises a mixer, a spraying compressed air pipe, a spraying water source pipe and a spraying material pipe are provided on one side of the mixer, and a spraying material delivery pipe is provided on the other side of the mixer, a spraying material delivery pipe is connected to one end of the spraying material delivery pipe, and the spraying port of the spraying pipe is aligned with the gap between the refractory material at the steel outlet and the ceramic sleeve.

[0011] Furthermore, the spray repair system is installed inside the first robotic arm, the spray port of the spray pipe is located at the end of the first robotic arm, and the spray repair system is integrated with the morphology support system.

[0012] Furthermore, it also includes a second supporting and positioning trolley, a second fixed column is provided on the upper part of the second supporting and positioning trolley, a second hydraulic cylinder is installed inside the second fixed column, the top of the piston rod of the second hydraulic cylinder is connected to a second telescopic column, a second mechanical arm is provided on the upper end of the second telescopic column, the spraying system is installed inside the second mechanical arm, and the spraying port of the spraying pipe is located at the end of the second mechanical arm; the spraying system and the shape support system are configured separately.

[0013] Furthermore, support arms are hinged on both sides of the first supporting and positioning trolley and the second supporting and positioning trolley, and support legs are threadedly connected to the ends of the support arms.

[0014] Furthermore, one end of the spray pipe is connected to a distributor, the lower part of the distributor is connected to a bottom plate, the ceramic sleeve is installed at the lower part of the bottom plate, and the bottom plate is connected to a plurality of distributor pipes, which are evenly distributed along the circumferential direction of the ceramic sleeve.

[0015] Furthermore, a boss is provided on the bottom plate, and the material distributor pipe is located between the boss and the inner wall of the distributor.

[0016] Furthermore, a motor is installed on one side of the lower part of the first robotic arm, and the output shaft of the motor extends to the inside of the first robotic arm and is connected to a driving sprocket. The spray pipe is rotatably installed at one end of the first robotic arm through a bearing, and a driven sprocket is provided on the spray pipe. The driving sprocket and the driven sprocket are connected by a chain. A rotary joint is provided at the upper end of the spray pipe, and one end of the spray material delivery pipe is connected to the rotary joint.

[0017] Furthermore, the lower part of the first robotic arm is connected to a cooling compressed air inlet pipe, the upper part of the first robotic arm is connected to a cooling compressed air outlet pipe, a baffle is provided inside the first robotic arm, a partition is fixedly connected to one side of the baffle, and a flow gap is provided between one end of the partition and one end of the first robotic arm; the driving sprocket, the driven sprocket and the chain are located at the lower part of the partition, and the gunning material delivery pipe is located at the upper part of the partition.

[0018] A method for repairing refractory material of a converter tapping port comprises the following steps:

[0019] Step 1: After the steel is tapped, the slag splashing and slag pouring are completed, the converter is turned to the direction of steel tapping, and the steel tapping port is positioned to a vertical state (perpendicular to the horizontal plane) by the converter tilting angle meter according to the angle of the steel tapping port;

[0020] Step 2: Move the above-mentioned converter tapping port refractory repair device to one side of the converter port, and adjust the position of the first mechanical arm of the first supporting and positioning trolley to move the first mechanical arm into the converter furnace, and ensure that the center line of the tapping port and the center line of the ceramic sleeve are in line by moving the first supporting and positioning trolley, and then put the first supporting and positioning trolley in a fixed state, and control the hydraulic cylinder to retract again to drop the lower end of the ceramic sleeve to the lower end of the tapping port;

[0021] When the morphology support system and the gunning system adopt an integrated structure, that is, the gunning system is installed inside the first mechanical arm, the position adjustment of the morphology support system and the gunning system can be completed at the same time by adjusting the first mechanical arm; when the morphology support system and the gunning system adopt a split structure, that is, the gunning system and the morphology support system are arranged separately, after adjusting the morphology support system, adjust the gunning system in place so that the spraying port of the spraying pipe is aligned with the gap between the refractory material and the ceramic sleeve at the steel outlet;

[0022] Step 3: introducing cooling compressed air into the first robotic arm to cool the robotic arm and the power components inside it;

[0023] Step 4: Start the motor and use the chain drive to drive the ceramic sleeve to rotate; then pass the compressed air, water and gunning material into the gunning compressed air pipe, gunning water source pipe and gunning material pipe respectively, and spray the gunning material into the gap between the refractory material and the ceramic sleeve at the steel outlet; during the spraying process, the first mechanical arm is slowly lifted by the hydraulic cylinder, and the ceramic sleeve is lifted accordingly, and the steel outlet is sprayed and repaired layer by layer; after the gunning material is sprayed into the gap, it is quickly sintered using the heat of the furnace lining. After sintering, the gunning material expands and effectively fills the lower part of the ceramic sleeve to prevent the leakage of thin material. The gunning material is sprayed and sintered layer by layer from bottom to top, and the ceramic sleeve is lifted synchronously until the gunning material surface is flush with the theoretical material surface of the furnace lining, and the repair is completed.

[0024] Step 5: After the repair is completed, remove the repair device and continue to use the heat from the furnace lining to sinter the gunning material for 5-10 minutes.

[0025] Furthermore, in step 2, before the first robot arm moves into the converter furnace, an anti-stick coating is sprayed on the outside of the ceramic sleeve to prevent the ceramic sleeve from sintering and adhering to the spray coating.

[0026] The beneficial effects of the present invention are:

[0027] 1) The present invention utilizes a morphological support system to support the designed hole shape of the steel outlet, and utilizes a gunning system to evenly spray the gunning material into the gap between the steel outlet refractory and the ceramic sleeve, thereby repairing the corroded converter steel outlet hole shape, ensuring the functional effect of "slag-steel separation" at the steel outlet, increasing the life of the steel outlet refractory, and ensuring safe, stable and smooth production.

[0028] 2) The gunning system is integrated inside the first robotic arm. The operator only needs to control the first support positioning trolley, the first hydraulic cylinder and the first robotic arm to simultaneously complete the position adjustment of the morphological support system and the gunning system, which simplifies the operation process and improves the efficiency of refractory repair at the steel outlet.

[0029] 3) The spray patching system and the shape support system are configured separately, so that the spray patching operation can be performed independently of the shape support system, which improves the flexibility of the operation.

[0030] 4) One end of the spraying pipe is connected to a distributor, and the bottom plate of the distributor is connected to several distributors evenly distributed along the circumference of the ceramic sleeve, ensuring that the gunning material can evenly cover all areas of the steel outlet, avoiding the problems of uneven spraying thickness, local accumulation or omission that may be caused by a traditional single spraying point, thereby improving the stability and consistency of the spraying quality. In addition, multiple distributors work simultaneously, which can greatly increase the output of gunning material per unit time, significantly improve the repair speed of the steel outlet refractory, reduce downtime, and facilitate rapid resumption of production.

[0031] 5) A boss is provided on the bottom plate, and a distribution pipe is provided between the boss and the inner wall of the distributor, so that the gunning material in the distributor can flow into the distribution pipe, thereby avoiding the gunning material from accumulating in the middle of the bottom plate.

[0032] 6) A motor is installed on one side of the lower part of the first robotic arm, and a driving sprocket is connected to the output shaft of the motor. A driven sprocket is provided on the spray pipe. The driving sprocket and the driven sprocket are connected by a chain. A rotary joint is provided on the upper end of the spray pipe, and one end of the spray material delivery pipe is connected to the rotary joint. When the refractory material at the steel outlet is repaired, the motor drives the spray pipe to rotate through a chain drive, thereby driving the sleeve, the distributor and the distributor pipe to rotate. Since the sleeve rotates with the spray pipe, its surface is not easy to adhere and sinter with the spray material, which effectively reduces the adhesion problem that may occur in the traditional fixed spraying process, so that the spray material can be more easily separated from the sleeve after spraying, thereby improving the cleanliness and efficiency of the spraying operation.

[0033] 7) A cooling compressed air inlet pipe is connected to the lower part of the first mechanical arm, and a cooling compressed air outlet pipe is connected to the upper part of the first mechanical arm. A baffle is arranged inside the first mechanical arm, and a partition is fixedly connected to one side of the baffle. The driving sprocket, the driven sprocket and the chain are located at the lower part of the partition, and the gunning material delivery pipe is located at the upper part of the partition. The cooling compressed air enters the first mechanical arm from the cooling compressed air inlet pipe to cool down the first mechanical arm and the driving sprocket, the driven sprocket and the chain, thereby avoiding deformation of the first mechanical arm and the driving sprocket, the driven sprocket and the chain, which is beneficial to improving the overall reliability of the equipment and reducing the failure rate; after flowing through the first mechanical arm, the cooling compressed air is heated by the hot air in the converter, and the heated cooling compressed air flows out from the cooling compressed air outlet pipe on the upper part of the partition, which heats the gunning material delivery pipe; this heating effect can enhance the fluidity of the gunning material, making it easier to distribute evenly during the spraying process, thereby improving the spraying efficiency and the repair quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attached Figure 1 It is a structural schematic diagram of Example 1 of a refractory repair device for a converter tapping port of the present invention.

[0035] Attached Figure 2 It is a schematic diagram of the interior of a mechanical arm of a converter tapping port refractory repair device according to the present invention.

[0036] Attached Figure 3 It is an exploded view of a distributor and a bottom plate in a refractory repair device for a converter tapping port of the present invention.

[0037] Attached Figure 4 It is a schematic diagram of a mixer in a converter tapping port refractory repair device of the present invention.

[0038] Attached Figure 5It is a structural schematic diagram of Example 2 of a refractory repair device for a converter tapping port of the present invention.

[0039] In the figure, 1. converter; 2. steel outlet; 3. first supporting and positioning trolley; 4. supporting arm; 5. supporting leg; 6. first fixed column; 7. first telescopic column; 8. first hydraulic cylinder; 9. first mechanical arm; 10. gunning material delivery pipe; 11. mixer; 12. gunning compressed air pipe; 13. gunning water source pipe; 14. gunning material pipe; 15. rotary joint; 16. driven sprocket; 17. spraying pipe; 18. distributor; 19. bottom plate; 20. boss; 21. distributor pipe; 22. ceramic sleeve; 23. cooling compressed air outlet pipe; 24. cooling compressed air inlet pipe; 25. motor; 26. driving sprocket; 27. chain; 28. partition; 29. ​​baffle; 30. counterweight; 31. second supporting and positioning trolley; 32. second fixed column; 33. second mechanical arm. DETAILED DESCRIPTION

[0040] The following will be combined with the attached Figure 1-Figure 5 , 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.

[0041] 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.

[0042] Example 1

[0043] like Figure 1 As shown, a converter tapping port refractory repair device includes a shape support system and a gunning system, such as Figure 2 As shown, the morphological support system includes a first supporting and positioning trolley 3, a first fixed column 6 is provided on the upper part of the first supporting and positioning trolley 3, a first hydraulic cylinder 8 is installed inside the first fixed column 6, a first telescopic column 7 is connected to the top of the piston rod of the first hydraulic cylinder 8, the lower end of the first telescopic column 7 is slidably installed inside the first fixed column 6, a first mechanical arm 9 is provided on the upper end of the first telescopic column 7, a counterweight 30 is provided at one end of the first mechanical arm 9, and a ceramic sleeve 22 is provided at the other end of the first mechanical arm 9, and the outer diameter of the ceramic sleeve 22 is the same as the designed inner diameter of the two sets of bricks at the steel outlet; as shown Figure 4 As shown, the gunning system includes a mixer 11, one side of the mixer 11 is provided with a gunning compressed air pipe 12, a gunning water source pipe 13 and a gunning material pipe 14, the other side of the mixer 11 is provided with a gunning material delivery pipe 10, one end of the gunning material delivery pipe 10 is connected to a spraying pipe 17, and the spraying port of the spraying pipe 17 is aligned with the gap between the refractory material of the steel outlet 2 and the ceramic sleeve 22.

[0044] like Figure 2 As shown, the spraying system is installed inside the first robotic arm 9, and the spraying port of the spray pipe 17 is located at the end of the first robotic arm 9, integrating the spraying system with the morphological support system, thereby reducing the complexity of the repair operation. Specifically, the operator only needs to control the first support positioning trolley 3, the first hydraulic cylinder 8 and the first robotic arm 9 to simultaneously complete the position adjustment of the morphological support system and the spraying system, thereby simplifying the operation process and improving the efficiency of the refractory repair of the steel outlet 2.

[0045] like Figure 2 As shown, both sides of the first supporting and positioning trolley 3 and the second supporting and positioning trolley 31 are hinged with supporting arms 4, and the ends of the supporting arms 4 are threadedly connected with supporting legs 5, which are convenient for fixing the shape support system and the spraying system after the position is adjusted.

[0046] like Figure 3 As shown, one end of the spraying pipe 17 is connected to a distributor 18, and the lower part of the distributor 18 is connected to a base plate 19, and the ceramic sleeve 22 is installed at the lower part of the base plate 19. A number of distributors 21 are connected to the base plate 19, and the distributors 21 are evenly distributed along the circumferential direction of the ceramic sleeve 22; by evenly distributing a number of distributors 21 on the base plate 19 and arranging them along the circumferential direction of the ceramic sleeve 22, it is ensured that the spraying material can evenly cover all areas of the steel outlet 2. This design avoids the problems of uneven spraying thickness, local accumulation or omission that may be caused by a traditional single spraying point, thereby improving the stability and consistency of the spraying quality. In addition, the simultaneous operation of multiple distributors 21 can greatly increase the output of spraying material per unit time, so that the repair speed of the refractory material of the steel outlet 2 is significantly improved, the downtime is reduced, and it is conducive to the rapid resumption of production.

[0047] like Figure 3 As shown, a boss 20 is provided on the bottom plate 19 , and the distribution pipe 21 is located between the boss 20 and the inner wall of the distributor 18 . The boss 20 facilitates the flow of the gunning material in the distributor 18 into the distribution pipe 21 , thereby avoiding the gunning material from accumulating in the middle of the bottom plate 19 .

[0048] like Figure 2As shown, a motor 25 is installed on one side of the lower part of the first mechanical arm 9, and the output shaft of the motor 25 extends to the inside of the first mechanical arm 9 and is connected to a driving sprocket 26. The spraying pipe 17 is rotatably installed at one end of the first mechanical arm 9 through a bearing, and a driven sprocket 16 is provided on the spraying pipe 17. The driving sprocket 26 and the driven sprocket 16 are connected by a chain 27. A rotary joint 15 is provided on the upper end of the spraying pipe 17, and one end of the spraying material delivery pipe 10 is connected to the rotary joint 15; when the refractory material of the steel outlet 2 is repaired, the motor 25 drives the spraying pipe 17 to rotate through a chain drive, and then drives the sleeve, the distributor 18 and the distributor pipe 21 to rotate; because the sleeve rotates with the spraying pipe 17, its surface is not easy to adhere and sinter together with the spraying material. This rotating design effectively reduces the adhesion problem that may occur in the traditional fixed spraying process, so that the spraying material can be more easily separated from the sleeve after spraying, thereby improving the cleanliness and efficiency of the spraying operation.

[0049] like Figure 2 As shown, the lower part of the first mechanical arm 9 is connected to a cooling compressed air inlet pipe 24, the upper part of the first mechanical arm 9 is connected to a cooling compressed air outlet pipe 23, a baffle 29 is provided inside the first mechanical arm 9, a partition 28 is fixedly connected to one side of the baffle 29, and a flow gap is provided between one end of the partition 28 and one end of the first mechanical arm 9; the driving sprocket 26, the driven sprocket 16 and the chain 27 are located at the lower part of the partition 28, and the gunning material delivery pipe 10 is located at the upper part of the partition 28. The cooling compressed air enters the first mechanical arm 9 from the cooling compressed air inlet pipe 24, and the first mechanical arm 9 and .... The sprocket 26, the driven sprocket 16 and the chain 27 are cooled to avoid deformation of the first mechanical arm 9 and the active sprocket 26, the driven sprocket 16 and the chain 27, which is beneficial to improving the overall reliability of the equipment and reducing the failure rate; after flowing through the first mechanical arm 9, the cooling compressed air is heated by the hot air in the converter 1, and when the heated cooling compressed air flows out from the cooling compressed air outlet pipe 23 on the upper part of the partition 28, it will heat the gunning material delivery pipe 10; this heating effect can enhance the fluidity of the gunning material, making it easier to distribute evenly during the spraying process, thereby improving the spraying efficiency and repair quality.

[0050] Example 2

[0051] like Figure 5As shown, what is different from Example 1 is that it also includes a second supporting and positioning trolley 31, a second fixed column 32 is provided on the upper part of the second supporting and positioning trolley 31, a second hydraulic cylinder is installed inside the second fixed column 32, the top of the piston rod of the second hydraulic cylinder is connected to a second telescopic column, a second mechanical arm 33 is provided on the upper end of the second telescopic column, the spraying system is installed inside the second mechanical arm 33, and the spraying port of the spray pipe 17 is located at the end of the second mechanical arm 33; the spraying system and the shape support system are configured separately, so that the spraying operation can be performed independently of the shape support system, thereby improving the flexibility of the operation.

[0052] A method for repairing refractory material of a converter tapping port comprises the following steps:

[0053] Step 1: After the steel is tapped, the slag splashing and slag pouring are completed, the converter 1 is turned to the steel tapping direction, and the steel tapping port is positioned to a vertical state (perpendicular to the horizontal plane) by the converter tilting angle meter according to the size of the steel tapping port angle;

[0054] Step 2: Move the above-mentioned converter tapping port refractory repair device to one side of the furnace mouth of the converter 1, and adjust the position of the first mechanical arm 9 of the first supporting and positioning trolley 3, so that the first mechanical arm 9 moves into the converter 1 furnace, and ensure that the center line of the tapping port 2 and the center line of the ceramic sleeve 22 are in line by moving the first supporting and positioning trolley 3, and then put the first supporting and positioning trolley 3 in a fixed state, and control the hydraulic cylinder to retract again, so that the lower end of the ceramic sleeve 22 drops to the lower end of the tapping port;

[0055] When the morphology support system and the spraying system adopt an integrated structure, that is, the spraying system is installed inside the first mechanical arm 9, the position adjustment of the morphology support system and the spraying system can be completed simultaneously by adjusting the first mechanical arm; when the morphology support system and the spraying system adopt a split structure, that is, the spraying system and the morphology support system are arranged separately, first adjust the morphology support system to the right position so that the center line of the steel outlet 2 and the center line of the ceramic sleeve 22 are in line, and then put the first support positioning trolley 3 in a fixed state, and control the hydraulic cylinder to contract again so that the lower end of the ceramic sleeve 22 drops to the lower end of the steel outlet; then adjust the spraying system to the right position so that the spraying port of the spraying pipe 17 is aligned with the gap between the refractory material of the steel outlet and the ceramic sleeve 22;

[0056] Step 3: Cooling compressed air is introduced into the first mechanical arm 9 to cool the mechanical arm and the power components inside it;

[0057] Step 4: Start the motor 25 and use the chain drive to drive the ceramic sleeve 22 to rotate; then introduce compressed air, water and gunning material into the gunning compressed air pipe 12, the gunning water source pipe 13 and the gunning material pipe 14 respectively, and spray the gunning material into the gap between the refractory material at the steel outlet and the ceramic sleeve 22; during the spraying process, the first mechanical arm 9 is slowly lifted by the hydraulic cylinder, and the ceramic sleeve 22 is lifted accordingly, and the steel outlet is sprayed and repaired layer by layer; after the gunning material is sprayed into the gap, it is quickly sintered using the heat of the furnace lining. After sintering, the gunning material expands and effectively fills the lower part of the ceramic sleeve 22 to prevent the leakage of thin material. The gunning material is sprayed and sintered layer by layer from bottom to top, and the ceramic sleeve 22 is lifted synchronously until the gunning material surface is flush with the theoretical material surface of the furnace lining, and the repair is completed.

[0058] Step 5: After the repair is completed, remove the repair device and continue to use the heat from the furnace lining to sinter the gunning material for 5-10 minutes.

[0059] Furthermore, in step 2, before the first robot arm 9 moves into the converter 1, an anti-stick coating is sprayed on the outside of the ceramic sleeve 22 to prevent the ceramic sleeve 22 from being sintered and adhered to the sprayed coating.

[0060] 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 converter tapping refractory repair device, comprising a morphology support system and a gunning system, characterized in that: The morphological support system comprises a first support positioning trolley (3), a first fixed column (6) is provided on the upper part of the first support positioning trolley (3), a first hydraulic cylinder (8) is installed inside the first fixed column (6), a first telescopic column (7) is connected to the top of the piston rod of the first hydraulic cylinder (8), the lower end of the first telescopic column (7) is slidably installed inside the first fixed column (6), a first mechanical arm (9) is provided on the upper end of the first telescopic column (7), a counterweight (30) is provided at one end of the first mechanical arm (9), and a counterweight (30) is provided at the other end of the first mechanical arm (9). A ceramic sleeve (22) is provided at the end, and the outer diameter of the ceramic sleeve (22) is the same as the designed inner diameter of the sleeve brick of the steel outlet (2); the gunning system comprises a mixer (11), one side of the mixer (11) is provided with a gunning compressed air pipe (12), a gunning water source pipe (13) and a gunning material pipe (14), and the other side of the mixer (11) is provided with a gunning material delivery pipe (10), one end of the gunning material delivery pipe (10) is connected to a spraying pipe (17), and the spraying port of the spraying pipe (17) is aligned with the gap between the refractory material of the steel outlet (2) and the ceramic sleeve (22).

2. A converter tapping hole refractory repair device according to claim 1, characterized in that: The spray repair system is installed inside the first mechanical arm (9), the spray port of the spray pipe (17) is located at the end of the first mechanical arm (9), and the spray repair system is integrated with the morphology support system.

3. The converter tapping hole refractory repair device according to claim 1, characterized in that: It also includes a second supporting and positioning trolley (31), a second fixed column (32) is provided on the upper part of the second supporting and positioning trolley (31), a second hydraulic cylinder is installed inside the second fixed column (32), a second telescopic column is connected to the top of the piston rod of the second hydraulic cylinder, a second mechanical arm (33) is provided on the upper end of the second telescopic column, the spraying system is installed inside the second mechanical arm (33), and the spraying port of the spraying pipe (17) is located at the end of the second mechanical arm (33); the spraying system and the shape supporting system are configured separately.

4. The converter tapping hole refractory repair device according to claim 1, characterized in that: Support arms (4) are hinged on both sides of the first supporting and positioning trolley (3) and the second supporting and positioning trolley (31), and support legs (5) are threadedly connected to the ends of the support arms (4).

5. The converter tapping hole refractory repair device according to claim 2, characterized in that: One end of the spray pipe (17) is connected to a distributor (18), the lower part of the distributor (18) is connected to a base plate (19), the ceramic sleeve (22) is installed at the lower part of the base plate (19), and the base plate (19) is connected to a plurality of distributor pipes (21), and the plurality of distributor pipes (21) are evenly distributed along the circumferential direction of the ceramic sleeve (22).

6. A converter tapping hole refractory repair device according to claim 5, characterized in that: A boss (20) is provided on the bottom plate (19), and the material distributor (21) is located between the boss (20) and the inner wall of the distributor (18).

7. The converter tapping hole refractory repair device according to claim 5, characterized in that: A motor (25) is installed on one side of the lower part of the first mechanical arm (9), the output shaft of the motor (25) extends into the interior of the first mechanical arm (9) and is connected to a driving sprocket (26), the spray pipe (17) is rotatably installed on one end of the first mechanical arm (9) through a bearing, a driven sprocket (16) is provided on the spray pipe (17), the driving sprocket (26) and the driven sprocket (16) are connected by a chain (27), a rotary joint (15) is provided at the upper end of the spray pipe (17), and one end of the gunning material conveying pipe (10) is connected to the rotary joint (15).

8. The converter tapping hole refractory repair device according to claim 7, characterized in that: The lower part of the first mechanical arm (9) is connected to a cooling compressed air inlet pipe (24), and the upper part of the first mechanical arm (9) is connected to a cooling compressed air outlet pipe (23). A baffle (29) is provided inside the first mechanical arm (9), and a partition (28) is fixedly connected to one side of the baffle (29), and a flow gap is provided between one end of the partition (28) and one end of the first mechanical arm (9); the driving sprocket (26), the driven sprocket (16) and the chain (27) are located at the lower part of the partition (28), and the gunning material conveying pipe (10) is located at the upper part of the partition (28).

9. A method for repairing refractory material at a converter tapping port, characterized in that: The following steps are involved: Step 1: After the steel is tapped, the slag splashing and furnace protection and slag dumping are completed, the converter (1) is turned to the direction of steel tapping, and the steel tapping port (2) is positioned to a vertical state (perpendicular to the horizontal plane) by using a converter tilting angle meter in combination with the angle of the steel tapping port (2); Step 2: Move the converter tapping port refractory repair device as described in any one of claims 1 to 8 to one side of the furnace mouth of the converter (1), and adjust the position of the first mechanical arm (9) of the first supporting and positioning trolley (3) to move the first mechanical arm (9) into the converter (1), and ensure that the center line of the tapping port (2) and the center line of the ceramic sleeve (22) are in line by moving the first supporting and positioning trolley (3), and then place the first supporting and positioning trolley (3) in a fixed state, and control the hydraulic cylinder to retract again to lower the lower end of the ceramic sleeve (22) to the lower end of the tapping port (2); When the morphology support system and the spraying system adopt an integrated structure, that is, the spraying system is installed inside the first mechanical arm (9), the position adjustment of the morphology support system and the spraying system can be completed simultaneously by adjusting the first mechanical arm (9); when the morphology support system and the spraying system adopt a split structure, that is, the spraying system and the morphology support system are arranged separately, after adjusting the morphology support system, the spraying system is adjusted into place so that the spraying port of the spraying pipe (17) is aligned with the gap between the refractory material of the steel outlet (2) and the ceramic sleeve (22); Step 3: introducing cooling compressed air into the first mechanical arm (9) to cool the mechanical arm and the power components therein; Step 4: Start the motor (25) and use the chain drive to drive the ceramic sleeve (22) to rotate; then, respectively, introduce compressed air, water and gunning material into the gunning compressed air pipe (12), the gunning water source pipe (13) and the gunning material pipe (14), and spray the gunning material into the gap between the refractory material and the ceramic sleeve (22) at the steel outlet (2); during the spraying process, the first mechanical arm (9) is slowly lifted by the hydraulic cylinder, and the ceramic sleeve (22) is lifted accordingly, and the steel outlet (2) is sprayed and repaired layer by layer; after the gunning material is sprayed into the gap, it is quickly sintered using the heat of the furnace lining. After the gunning material is sintered, it expands and effectively blocks the lower part of the ceramic sleeve (22), thereby preventing the leakage of the thin material. The gunning material is sprayed and sintered layer by layer from bottom to top, and the ceramic sleeve (22) is lifted synchronously until the gunning material surface is flush with the theoretical material surface of the furnace lining, and the repair is completed; Step 5: After the repair is completed, remove the repair device and continue to use the heat from the furnace lining to sinter the gunning material for 5-10 minutes.

10. A method for repairing refractory material at a converter tapping port according to claim 9, characterized in that: In step 2, before the first robot arm (9) moves into the converter (1), an anti-stick coating is sprayed on the outside of the ceramic sleeve (22) to prevent the ceramic sleeve (22) from being sintered and adhered to the spray coating.

Images