Anti-deformation ladle lip structure

Abstract

The utility model discloses a kind of anti-deformation ladle mouth structure, including from inside to outside working layer, permanent layer, ladle shell;Protective steel plate is provided with in the periphery of ladle shell, protective steel plate is composed of arc steel plate and two closed vertical plates, two closed vertical plates are respectively located at the two sides of arc steel plate, and with arc steel plate welding, and then with arc steel plate mutually cooperate to form containing cavity;Multiple anchor, located in containing cavity, between each anchor in containing cavity and between arc steel plate and ladle shell Pouring corundum castable;Peripheral steel plate, with ladle mouth flush setting, respectively with arc steel plate, ladle shell, closed vertical plate welding, and then containing cavity is completely closed, and then form composite structure and protect the pouring arc-shaped part at ladle mouth portion;The utility model significantly enhances the strength and stability of ladle mouth, effectively suppresses the mouth deformation, solves the problem of mouth brick, dropping material from the root.

Description

Technical Field

[0001] This utility model belongs to the field of steelmaking equipment optimization, and particularly relates to a deformation-resistant ladle mouth structure. Background Technology

[0002] In the steel smelting industry, the steel ladle, as the core equipment for holding and transferring high-temperature molten steel, has a structure and performance that are crucial to the production process. A conventional steel ladle generally consists of an outer shell, a permanent layer, and a working layer that directly contacts the molten steel. The outer shell provides mechanical support for the overall structure, the permanent layer provides insulation and maintains structural stability, and the working layer withstands the scouring and erosion of the high-temperature molten steel. During steel smelting and tapping operations, slag adhesion is highly likely to occur at the ladle opening. To ensure the normal use of the ladle, a slag pressing process is often required.

[0003] The existing method used in the past was to directly press out slag adhering to the ladle opening. During this process, due to the high-temperature environment of the ladle and the mechanical stress generated by the pressing operation, the ladle shell is prone to deformation, especially at the opening. This deformation leads to the detachment of refractory material at the opening, resulting in brick and material falling off, which affects the thickness of the permanent lining. Especially when the steel output increases, the pressure and heat load on the ladle further increase, seriously threatening the safe use of the ladle. However, this method only focuses on solving the problem of slag adhesion at the opening, without fully considering the long-term negative impact of the pressing operation on the ladle opening structure, and does not fundamentally solve the deformation problem caused by high temperature and external forces.

[0004] While traditional slag pressing methods can temporarily solve the problem of slag adhesion at the ladle opening, they bring many serious negative effects. First, the high temperature and slag pressing operations cause deformation of the ladle shell, which not only reduces the structural stability of the ladle but also causes the refractory material at the ladle opening to lose effective support, leading to brick and material falling off, increasing maintenance costs and safety hazards. Second, ladle opening deformation affects the thickness of the permanent layer bonding, resulting in decreased thermal insulation performance and further impacting the ladle's service life. Furthermore, with increased steel output, the pressure and thermal stress on the ladle exceed its design bearing capacity, posing a severe challenge to its safe use. Utility Model Content

[0005] The purpose of this invention is to provide a deformation-resistant ladle mouth structure to fundamentally solve the deformation problem caused by high-temperature slag pressing operations and effectively prevent brick and material from falling off the mouth.

[0006] The present invention adopts the following technical solution: a deformation-resistant ladle mouth structure, comprising a working layer, a permanent layer, and a ladle shell from the inside out; the ladle mouth is divided into a tilting arc section and a surrounding section, the tilting arc section being the part through which molten steel flows out of the ladle mouth for a long time, and the tilting arc section is provided with corresponding hanging ears;

[0007] A protective steel plate is installed around the outer shell of the ladle. The protective steel plate is located at the ladle opening and outside the tilting arc-shaped part. The protective steel plate consists of an arc-shaped steel plate and two closed vertical plates. The opening of the arc-shaped steel plate faces the ladle opening. The outer arc edge of the arc-shaped steel plate is flush with the ladle opening, and the inner arc edge of the arc-shaped steel plate is close to and welded to the upper strap of the ladle. The two closed vertical plates are located on both sides of the arc-shaped steel plate and are welded to the arc-shaped steel plate, thus cooperating with the arc-shaped steel plate to form a receiving cavity.

[0008] Multiple anchors are located within the receiving cavity, and corundum castable is poured between the various anchors within the receiving cavity and between the arc-shaped steel plate and the steel ladle shell.

[0009] The outer steel plate is flush with the ladle opening and is welded to the arc-shaped steel plate, the ladle shell, and the sealing upright plate, thereby completely sealing the cavity and forming a composite structure to protect the tilting arc-shaped part at the ladle opening.

[0010] The beneficial effects of this utility model are:

[0011] This invention significantly enhances the strength and stability of the ladle opening, effectively suppresses opening deformation, solves the problem of brick and material falling off the opening from the root, ensures the stability of the permanent layer knot thickness of the ladle, greatly improves the safety performance of the ladle under different steel output conditions, and extends the service life of the ladle.

[0012] This invention not only reduces the high costs associated with frequent ladle repairs and replacements, but also ensures the continuity and stability of the steel production process, improves production efficiency, reduces the risk of production accidents caused by ladle malfunctions, significantly reduces ladle mouth deformation, lowers the temperature of the ladle shell, and improves structural stability.

[0013] This invention significantly improves the strength and stability of the ladle opening by setting up a protective steel plate, anchors, corundum castable, and an outer steel plate, thereby solving the problems of brick and material falling off the ladle opening. Attached Figure Description

[0014] Figure 1 This is a side view of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model.

[0016] Among them: 10. Working layer; 11. Permanent layer; 12. Steel ladle shell; 13. Tilting arc section; 14. Protective steel plate; 15. Enclosed vertical plate; 16. Arc steel plate; 17. Anchor; 18. Upper wrapping strap. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0019] This utility model discloses a deformation-resistant steel bag opening structure, such as... Figure 1 and Figure 2 As shown, it includes a working layer 10, a permanent layer 11, and a ladle shell 12 from the inside out; the ladle opening is divided into a tilting arc section 13 and a surrounding section. The tilting arc section 13 is the part through which molten steel flows out of the ladle opening for a long time, and the tilting arc section 13 is provided with corresponding lugs.

[0020] The pouring arc section 13 refers to the part through which molten steel flows out of the ladle opening during the pouring process. It can be a section of the ladle opening or half of it; in short, it's the part where slag easily adheres. Because during the pouring process, not the entire ladle opening needs to be smelted, but only the pouring arc section 13 does. Therefore, the pouring arc section 13 is the area where slag flow scours the ladle opening.

[0021] A protective steel plate 14 is provided on the periphery of the ladle shell 12. The protective steel plate 14 is located at the ladle opening and is located on the periphery of the tilting arc-shaped part 13. The protective steel plate 14 is composed of an arc-shaped steel plate 16 and two closed vertical plates 15. The opening of the arc-shaped steel plate 16 faces the ladle opening. The outer arc edge of the arc-shaped steel plate 16 is flush with the ladle opening, and the inner arc edge of the arc-shaped steel plate 16 is close to the upper strap 18 of the ladle and welded to the upper strap 18. The two closed vertical plates 15 are located on both sides of the arc-shaped steel plate 16 and are welded to the arc-shaped steel plate 16, thus cooperating with the arc-shaped steel plate 16 to form a receiving cavity.

[0022] Multiple anchors 17 are located within the receiving cavity, and corundum castable is poured between the various anchors 17 within the receiving cavity and between the arc-shaped steel plate 16 and the steel ladle shell 12.

[0023] The outer steel plate is flush with the ladle opening. The outer steel plate is welded to the arc-shaped steel plate 16, the ladle shell 12, and the closed vertical plate 15 respectively, thereby completely sealing the cavity and forming a composite structure to protect the tilting arc-shaped part 13 at the ladle opening.

[0024] Preferably, the anchors 17 are arranged in a cross configuration.

[0025] Preferably, one end of each anchor 17 is welded to the arc-shaped steel plate 16, and the other end is welded to the steel ladle shell 12.

[0026] Preferably, the outer ends of the two closed upright plates 15 are flush with the opening of the steel ladle, and the inner ends are welded to the upper strap 18.

[0027] Preferably, the center of the arc-shaped steel plate 16 coincides with the center of the opening of the steel ladle.

[0028] In this invention, during ladle operations, the heat generated by the high-temperature molten steel and the external forces from slag pressing primarily act on the structural system composed of the outermost arc-shaped steel plate 16 and the closed vertical plate 15. This effectively disperses and bears the external forces, preventing the ladle shell 12 from directly bearing excessive stress. Simultaneously, the corundum castable exhibits excellent thermal insulation properties, significantly reducing heat transfer to the ladle shell 12 and lowering its temperature, thereby mitigating the impact of thermal stress on the ladle shell 12. Furthermore, during solidification, the corundum castable tightly integrates with the arc-shaped steel plate 16 and the ladle shell 12, working synergistically with the anchors 17 to further enhance the stability and integrity of the entire protective structure, ensuring coordinated work between layers to jointly protect the ladle opening.

[0029] Example

[0030] The mechanical stress generated by the slag pressing operation in a steel plant acts on the ladle shell 12, making the ladle shell 12 very prone to deformation, especially at the ladle opening.

[0031] Therefore, by using this utility model for modification, a 1500mm×200mm×500mm arc-shaped steel plate 16 is added to the outside of the steel ladle opening, with a distance of 500mm between the two closed vertical plates 15, and an anchor 17 is implanted to enhance the strength of the ladle edge structure.

[0032] Curved steel plate 16: Made of high-temperature resistant, high-strength premium alloy steel, its dimensions are precisely set at 1500mm*200mm*500mm. It is custom-processed according to the curvature of the ladle rim to ensure a perfect fit with the outer edge. Curved steel plate 16 possesses excellent high-temperature strength retention performance, effectively withstanding the external impact of slag pressing operations in the high-temperature environment of ladle operations, providing direct structural protection for the ladle rim.

[0033] Closed vertical plates 15: One closed vertical plate 15 is installed every 500mm, and it is made of high-temperature resistant, high-strength alloy steel that matches the curved steel plate 16. These closed vertical plates 15 are welded to the curved steel plate 16 at a vertical angle, significantly improving the overall strength and deformation resistance of the curved steel plate 16 by increasing the lateral stiffness of the structure. Under high temperature and external force, the closed vertical plates 15 and the curved steel plate 16 work together to resist stress, effectively disperse concentrated stress, and prevent excessive local deformation of the curved steel plate 16.

[0034] Anchor 17: Silicon carbide-reinforced heat-resistant alloy anchor 17 is selected. Utilizing its excellent high-temperature stability, high strength, and good thermal expansion matching, it firmly connects the arc-shaped steel plate 16 to the ladle shell 12. The anchor 17 is inserted between the arc-shaped steel plate 16 and the ladle shell 12 in a crisscross pattern, forming a stable connection system. This ensures that under complex working conditions such as high temperature and vibration, the arc-shaped steel plate 16 and the ladle shell 12 maintain a tight connection and do not experience relative displacement, thereby guaranteeing the integrity and stability of the entire protective structure.

[0035] Corundum castable: High-purity corundum castable is poured into the gap between the curved steel plate 16 and the ladle shell 12. Its Al2O3 content is strictly controlled to ≥90%. This high-purity corundum castable possesses extremely high refractoriness and a temperature resistance >1800℃. After solidification, the corundum castable forms a continuous and dense heat-insulating solid layer. On the one hand, its high strength enhances the overall structural strength of the ladle edge; on the other hand, its low thermal conductivity effectively blocks the transfer of high temperature to the ladle shell 12, thereby significantly reducing the risk of deformation of the ladle shell 12 due to thermal stress.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deformation-resistant steel bag opening structure, characterized in that, It includes a working layer (10), a permanent layer (11), and a ladle shell (12) from the inside out; the ladle opening is divided into a tilting arc section (13) and a surrounding section, the tilting arc section (13) is the part through which molten steel flows out of the ladle opening, and the tilting arc section (13) is provided with corresponding lugs; A protective steel plate (14) is provided on the periphery of the outer shell (12) of the ladle. The protective steel plate (14) is located at the ladle opening and is located on the periphery of the tilting arc-shaped part (13). The protective steel plate (14) is composed of an arc-shaped steel plate (16) and two closed vertical plates (15). The opening of the arc-shaped steel plate (16) faces the ladle opening. The outer arc edge of the arc-shaped steel plate (16) is flush with the ladle opening. The inner arc edge of the arc-shaped steel plate (16) is close to the upper strap (18) of the ladle and is welded to the upper strap (18). The two closed vertical plates (15) are located on both sides of the arc-shaped steel plate (16) and are welded to the arc-shaped steel plate (16), thereby cooperating with the arc-shaped steel plate (16) to form a receiving cavity. Multiple anchors (17) are located in the receiving cavity, and corundum castable is poured between each anchor (17) in the receiving cavity and between the arc-shaped steel plate (16) and the steel ladle shell (12). The outer steel plate is flush with the ladle opening and is welded to the arc-shaped steel plate (16), the ladle shell (12), and the closed vertical plate (15) respectively, thereby completely sealing the cavity and forming a composite structure to protect the tilting arc-shaped part (13) at the ladle opening.

2. The anti-deformation steel ladle opening structure according to claim 1, characterized in that, The anchors (17) are arranged in a cross configuration.

3. The anti-deformation steel ladle opening structure according to claim 1, characterized in that, One end of each of the anchors (17) is welded to the arc-shaped steel plate (16), and the other end is welded to the steel ladle shell (12).

4. The anti-deformation steel ladle opening structure according to claim 1, characterized in that, The outer ends of the two closed uprights (15) are flush with the opening of the steel ladle, and the inner ends are welded to the upper strap (18).

5. The anti-deformation steel ladle opening structure according to claim 1, characterized in that, The center of the arc-shaped steel plate (16) coincides with the center of the opening of the steel ladle.

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