A ladle shell structure facilitating slag cleaning maintenance and enhancing structural

Abstract

This utility model relates to the field of metallurgical equipment technology, and in particular to a ladle rim structure that facilitates slag cleaning and maintenance and enhances the structure. It includes a ladle shell, a permanent lining, slag line bricks, internal strips, and castable refractory. The permanent lining is lower than the ladle shell. Internal strips are installed on the top of the permanent lining and are fixedly installed on the inner wall of the ladle shell. The internal strips are arranged in a gear-like pattern around the inner side of the rim, forming grooves between adjacent internal strips. Anchors are provided on the top surface, two side surfaces, inner end face, and upper inner edge of the internal strips. Castable refractory is installed around the internal strips and anchors, with the bottom of the castable refractory poured up to the top of the slag line bricks. The top surface of the castable refractory is 80-100mm higher than the top surface of the ladle shell. The beneficial effects of this utility model are: a more robust structure, improved corrosion and wear resistance, extended service life of the rim, convenient slag cleaning, reduced labor intensity, and improved operational safety and production continuity.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to a steel ladle rim structure that facilitates slag removal and maintenance and enhances structural integrity. Background Technology

[0002] In the continuous casting process of steelmaking, after molten steel is tapped from the converter to the ladle, it is refined in the LF furnace and then enters the continuous casting process. During this process, due to factors such as the impact of the flowing molten steel, argon gas stirring, and temperature changes, some steel slag is prone to splashing and adhering to the edge of the ladle mouth (i.e., the "ladle rim"), forming a hard slag layer.

[0003] During use, molten steel and slag easily adhere to the ladle rim, increasing cleaning difficulty, prolonging cleaning time, and reducing ladle turnover efficiency. Especially during slag removal, slag tends to stick to the ladle rim material and be cleaned together, causing the ladle rim to come into direct contact with molten steel and slag. Furthermore, long-term slag accumulation can affect the ladle's sealing performance, leading to safety hazards such as ladle bricks falling off and molten steel leakage. It also accelerates the erosion and damage of the ladle rim, increasing labor and equipment maintenance costs. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a steel ladle tank rim structure that facilitates slag removal and maintenance and enhances the structure. Without significantly increasing manufacturing costs, it reduces the range of impact from cleaning after steel slag adheres through structural optimization, and facilitates the intervention of mechanized or semi-mechanized slag removal tools, thereby reducing labor intensity and improving operational safety and production continuity.

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

[0006] A ladle rim structure that facilitates slag removal, maintenance, and structural reinforcement includes a ladle shell, a permanent lining, slag line bricks, internal strips, and castable refractory. The permanent lining is installed inside the ladle shell, and slag line bricks are installed inside the permanent lining. The permanent lining is lower than the ladle shell. Internal strips are installed on top of the permanent lining and are fixed to the inner wall of the ladle shell. The internal strips are arranged in a gear-like pattern around the inner rim, forming grooves between adjacent internal strips. The groove spacing d = 80–100 mm. Anchors are installed on the top surface, two side surfaces, inner end face, and upper inner edge of the internal strips. Anchors on the side surfaces of adjacent internal strips are staggered. Castable refractory is installed around the internal strips and anchors, with the bottom of the castable refractory poured up to the top of the slag line bricks. The top surface of the castable refractory is 80–100 mm higher than the top surface of the ladle shell. The castable refractory forms a sloping surface, narrower at the top and wider at the bottom, on the inner annular surface of the ladle shell, with an angle θ = 20°–30° between the sloping surface and the vertical plane.

[0007] Furthermore, the width of the built-in strip is b=40~50mm, and the height is H=80~100mm.

[0008] Furthermore, the anchor on the inner upper edge of the built-in strip points obliquely upward toward the upper edge of the castable refractory slope.

[0009] Furthermore, the anchor includes main bars and diagonal bars, the main bars are fixedly connected to the built-in strip, and diagonal bars are provided in the middle of the main bars.

[0010] Furthermore, the castable refractory is provided with a guide slope on the outer edge of the rim of the ladle tank.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1) The grooves formed by the built-in strips significantly increase the surface area of ​​the ladle rim after the rim lining is poured, effectively mitigating the upward force exerted on the rim by the thermal expansion of the slag line bricks. Furthermore, the construction process is simple during the pouring of the ladle rim lining lining; after the lining lining lining solidifies, the built-in strips integrate with the lining lining to form a unified whole. This makes the overall structure of the rim more robust, improves its resistance to corrosion and wear, and extends the service life of the rim.

[0013] 2) Anchors are arranged around the inner strip like a grid, allowing the castable refractory to adhere better to the inner strip and its surrounding area. This effectively prevents the castable refractory from sliding or flowing during construction, greatly increasing construction convenience. This bonding method makes the connection between the tank rim and the castable refractory tighter, effectively dispersing the pressure and impact from molten steel, slag, etc., resulting in a more robust structure with strong resistance to corrosion and wear.

[0014] 3) The internal strips are gear-shaped, allowing the castable refractory to fully fill the grooves between the internal strips and the surrounding space. Compared to traditional flat rims, where there is often incomplete filling between the rim material and the slag line bricks, this method effectively reduces the gaps between the rim material and the rim bricks. This reduction in gaps not only improves the density of the rim structure but also prevents molten steel, slag, and other media from seeping into the gaps and causing erosion, further enhancing the structural stability and durability of the rim.

[0015] 4) The refractory layer poured along the top of the ladle is higher than the ladle shell, permanent lining and slag line bricks to form a protective layer. The inner side of the refractory is sloping, which facilitates the cleaning of steel slag, saves cleaning time, improves the turnover of the ladle, thereby reducing labor intensity and improving operational safety and production continuity.

[0016] 5) The built-in strip can be removed separately and replaced individually after unpacking if damaged, which is flexible and convenient and reduces labor and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the steel ladle tank rim structure described in this utility model.

[0018] Figure 2 This is a top view of the steel ladle tank with the built-in strip structure described in this utility model.

[0019] Figure 3 This is a schematic diagram of the steel ladle tank structure described in this utility model.

[0020] In the diagram: 1. Steel ladle shell; 2. Permanent lining; 3. Castable refractory; 4. Internal strip; 5. Slag line brick; 6. Upper anchor; 7. Inclined anchor; 8. Side anchor; 9. Horizontal anchor; 10. Inclined surface; 11. Guide inclined surface. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0022] like Figures 1-3As shown, a ladle rim structure that facilitates slag removal, maintenance, and structural reinforcement includes a ladle shell 1, a permanent lining 2, slag line bricks 5, an inner strip 4, and castable refractory 3. The permanent lining 2 is installed inside the ladle shell 1, and slag line bricks 5 are installed inside the permanent lining 2. The permanent lining 2 is lower than the ladle shell 1. An inner strip 4 is installed on top of the permanent lining 2 and is fixedly installed on the inner wall of the ladle shell 1. The width b of the inner strip 4 is 40-50 mm, and the height H is 80-100 mm. It can be replaced individually after unpacking and damage, reducing labor and maintenance costs. The inner strip 4 is arranged in a gear-like pattern around the inner rim, forming grooves between adjacent inner strips 4 with a groove spacing d = 80-100 mm. An upper anchor 6 is installed on the top surface of the inner strip 4, side anchors 8 are installed on both sides, a transverse anchor 9 is installed on the inner end face, and an oblique anchor 7 is installed on the upper inner edge of the inner strip. The oblique anchor 7 on the upper inner edge of the inner strip 4 points obliquely upwards towards the upper edge of the inclined surface of the castable refractory 3. Side anchors 8 on adjacent built-in strips 4 are staggered. Castable refractory 3 is applied around the built-in strips 4 and anchors, with the bottom of the castable refractory 3 poured up to the top of the slag line brick 5. The anchors include main reinforcement and diagonal reinforcement. The main reinforcement is fixedly connected to the built-in strips 4, and diagonal reinforcement is placed in the middle of the main reinforcement to assist in anchoring the castable refractory 3. Upper anchors 6, diagonal anchors 7, side anchors 8, and horizontal anchors 9 reinforce the area around the built-in strips 4, forming a mesh structure along the top of the ladle. Castable refractory 3 is poured around the built-in strips 4 and anchors. After the castable refractory 3 solidifies, the built-in strips 4 and the castable refractory 3 become a single unit. The built-in strips 4 and anchors enhance the internal strength of the castable refractory 3 and improve its adhesion, thus strengthening the bond between the castable refractory 3 and the slag line brick 5. This makes the connection between the ladle rim body and the castable 3 tighter, similar to the combination of steel bars and concrete in construction. It can effectively disperse the pressure and impact from molten steel, slag, etc., making the overall structure of the ladle rim more robust, improving its resistance to corrosion and wear, and extending the service life of the ladle rim. The groove formed by the adjacent inner strips 4 greatly increases the surface area of ​​the ladle rim after the castable 3 is poured, effectively mitigating the upward force on the ladle rim caused by the thermal expansion of the slag line bricks 5. Moreover, the construction of the ladle rim castable 3 is simple, and the castable 3 can better adhere to the inner strips 4 and the surrounding area, effectively avoiding the slippage and flow of the castable 3 during construction, which is not conducive to construction, and greatly increases the convenience of construction.

[0023] The top surface of the castable refractory 3 is 80-100mm higher than the top surface of the ladle shell 1. The castable refractory 3 forms a sloping surface 10, narrower at the top and wider at the bottom, on the inner annular surface of the ladle shell. The angle θ between the sloping surface 10 and the vertical plane is 20°-30°. This facilitates the intervention of mechanized or semi-mechanized slag removal tools, simplifying slag removal, saving cleaning time, improving ladle turnover, thereby reducing labor intensity, and enhancing operational safety and production continuity. A guide sloping surface 11 is provided on the outer annular surface of the ladle shell along the edge of the castable refractory 3. The guide sloping surface 11 is suitable for sealing the ladle shell, improving sealing performance, and preventing safety hazards such as ladle bricks falling and molten steel leakage.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ladle rim structure for easy slag cleaning, maintenance, and structural reinforcement, comprising a ladle shell, a permanent lining, slag line bricks, an inner strip, and castable refractory, wherein the permanent lining is provided inside the ladle shell, and slag line bricks are provided inside the permanent lining, characterized in that, The permanent lining is lower than the ladle shell. An internal strip is provided on the top of the permanent lining and is fixedly installed on the inner wall of the ladle shell. The internal strip is arranged in a gear shape around the inner side of the rim, and a groove is formed between adjacent internal strips. The groove spacing d = 80-100mm. Anchors are provided on the top surface, two side surfaces, inner end face, and upper inner edge of the internal strip. The anchors on the side surfaces of adjacent internal strips are staggered. Castable refractory is provided around the internal strips and anchors. The bottom of the castable refractory is poured to the top of the slag line brick. The top surface of the castable refractory is 80-100mm higher than the top surface of the ladle shell. The castable refractory forms a sloping surface that is narrower at the top and wider at the bottom on the inner annular surface of the ladle shell. The angle θ between the sloping surface and the vertical plane is 20°-30°.

2. The steel ladle tank rim structure according to claim 1, which facilitates slag removal and maintenance and enhances the structure, is characterized in that... The width b of the built-in strip is 40-50 mm, and the height H is 80-100 mm.

3. The ladle rim structure according to claim 1, which facilitates slag removal and maintenance and enhances the structure, is characterized in that... The anchor on the inner upper edge of the built-in strip points obliquely upward toward the upper edge of the castable refractory slope.

4. The steel ladle rim structure according to claim 1, which facilitates slag removal and maintenance and enhances the structure, is characterized in that... The anchor includes main bars and diagonal bars. The main bars are fixedly connected to the built-in bars, and diagonal bars are provided in the middle of the main bars.

5. The ladle rim structure according to claim 1, which facilitates slag removal and maintenance and enhances structural integrity, is characterized in that... The castable refractory has a guide slope on the annular surface along the outer edge of the ladle tank.

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