Durable steel ladle cover

Abstract

The utility model discloses a durable steel ladle cover which comprises a cover body, the cover body is of a cylindrical structure with an opening in the lower end, an inner flange is arranged at the opening end of the cover body, transverse and longitudinal separation beams are arranged in the cover body and divide the inner space of the cover body into a plurality of filling areas, through holes are formed in the transverse and longitudinal separation beams, hexsteel is arranged in the filling areas, and the opening end of the cover body is provided with a through hole. A plurality of anchoring parts extending towards the opening side are arranged on the inner top face of the cover body, the hexsteel is fixed in the filling area through the anchoring parts, a heat insulation layer is arranged between the inner top face of the cover body and the transverse and longitudinal separation beams, a permanent layer is arranged in the filling area, and a working layer is arranged on the surface of the permanent layer. The interior of the cover body is divided into a plurality of filling areas through the transverse and longitudinal separation beams, the adjacent filling areas are physically connected through the through holes, the hexsteel serves as a framework of refractory materials and is fixed in the filling areas through the anchoring parts, and a composite layered structure of the heat insulation layer, the permanent layer and the working layer is adopted. The problems that a traditional ladle cover is prone to cracking, short in service life, high in maintenance cost and the like can be effectively solved.

Description

A durable steel ladle cover Technical Field

[0001] This utility model relates to the field of steel ladle cover technology, specifically to a durable steel ladle cover. Background Technology

[0002] The ladle cover is a lid placed over the molten steel ladle during ladle furnace operations. It is installed by a ladle covering device to insulate the molten steel inside. Currently used ladle covers are welded steel shell structures with refractory material bonded inside. Because the ladle cover needs to be frequently put on and taken off, and the temperature fluctuations are frequent, the internal refractory material can develop thermal stress cracks during operation. This can lead to problems such as internal refractory material spalling and collapse, as well as deformation and burning of the external steel structure, thus affecting its service life.

[0003] Chinese Patent Publication No. CN214349570U discloses a composite steel ladle cover, including a shell and a filling assembly. The shell has a recessed area from top to bottom to form a filling region. The filling assembly includes a fixing member and a casting member. The fixing member is located within the filling region and fixedly connected to the shell. The fixing member includes a long-distance fixing member and at least one short-distance fixing member for anchoring the casting member cast in the filling region. The fixing member includes a precast block surrounding the periphery of the filling region and fitting snugly against the casting member. This patent enhances the edge strength of the shell by using precast blocks, while reducing the contact area between the casting and the steel shell to mitigate deformation of the steel shell, thereby reducing the internal stress on the casting member caused by rigid deformation. However, this patented steel ladle cover is prone to thermal stress concentration under high-temperature environments, and the adhesion of the refractory material is low, leading to refractory material cracking and peeling, and resulting in high maintenance costs. Summary of the Invention

[0004] The main objective of this invention is to overcome the deficiencies of the prior art and provide a durable steel ladle cover.

[0005] To achieve the above objectives, this utility model proposes a durable steel ladle cover, comprising a cover body, the cover body being a cylindrical structure with an open bottom, the open end of the cover body having an inwardly flanged edge, the interior of the cover body having transverse and longitudinal dividing beams, the transverse and longitudinal dividing beams dividing the interior space of the cover body into several filling areas, the transverse and longitudinal dividing beams having through holes, the several filling areas having a hexagonal mesh, the inner top surface of the cover body having several anchors extending towards the open side, the hexagonal mesh being fixed in the filling areas by the anchors, a heat insulation layer being provided between the inner top surface of the cover body and the transverse and longitudinal dividing beams, a permanent layer being provided in the filling areas, and a working layer being provided on the surface of the permanent layer. The interior of the cover is divided into multiple filling zones by horizontal and vertical dividing beams, which disperses the concentration of thermal stress under high temperature conditions. The through holes on the horizontal and vertical dividing beams allow the refractory material of adjacent filling zones to form a physical connection, enhancing the overall structural integrity, facilitating casting, and allowing the refractory material in the filling zone to undergo slight displacement when heated, thus relieving thermal stress. By using a hexagonal mesh as the skeleton of the refractory material, the hexagonal mesh is fixed in the filling zone with anchors to form a three-dimensional mesh support, which effectively prevents the refractory material from peeling or collapsing due to alternating hot and cold temperatures. Moreover, the hexagonal mesh can absorb mechanical vibration energy through deformation, which can effectively resist thermal shock. The bottom edge of the working layer is locked by the inward flange to further prevent the entire refractory layer from falling off. By adopting a composite layered structure of insulation layer, permanent layer and working layer, the thermal insulation performance and durability of the steel ladle cover are improved.

[0006] In a further optimized technical solution, both the cover and the horizontal and vertical partition beams are made of 8-15mm thick heat-resistant steel, with the heat-resistant steel type being 1Cr18Ni9Ti. The setting of the horizontal and vertical partition beams can improve the deformation resistance of the cover.

[0007] In a further optimized technical solution, the insulation layer has a thickness of 10mm, and is formed by layering nano-micromaterial insulation boards inside the cover body. The insulation layer reduces heat transfer to the cover body, thus minimizing heat loss.

[0008] In a further optimized technical solution, the thickness of the permanent layer is 300mm, and the permanent layer is cast from high-alumina castable, mullite castable, or alumina-magnesia castable. The permanent layer is the thickest refractory material layer and plays a major role in heat preservation and insulation.

[0009] In a further optimized technical solution, the working layer has a thickness of 30mm and is cast from magnesia refractory material or magnesia-calcium refractory material. The working layer is subject to the impact of molten steel and the erosion of steel slag; using magnesia or magnesia-calcium refractory material enhances its resistance to these effects.

[0010] In a further optimized technical solution, the anchor includes a straight rod section and a V-shaped section. One end of the straight rod section is fixed to the inner top surface of the cover, and the tip of the V-shaped section is fixedly connected to the free end of the straight rod section. Horizontal rods are respectively provided at the two open ends of the V-shaped section. The anchor better secures the refractory material, and the horizontal rods, embedded in the cast refractory material, form a mechanical interlock, further preventing the refractory material from falling off.

[0011] In a further optimized technical solution, two locking holes are spaced apart on the straight rod section, the distance between the two locking holes corresponding to the thickness of the hexagonal mesh. A clamping rod is horizontally inserted into each locking hole. The anchor not only secures the refractory material but also the hexagonal mesh. Installation is achieved by inserting the clamping rod into the two locking holes; the clamping rod is removable, allowing for the replacement of sections of the hexagonal mesh later.

[0012] In a further optimized technical solution, the overall length of the anchor is 325mm, and the anchor is made of heat-resistant steel. The anchor is designed with sufficient length to simultaneously secure the working layer.

[0013] In a further optimized technical solution, the hexagonal mesh is formed by interlocking several hexagonal frames. Each face of the hexagonal frame has a rectangular hole, and one side of each rectangular hole has a protrusion. The protrusion has a locking part and a mud claw part. The hexagonal mesh is formed by interlocking several hexagonal frames, which facilitates installation. Moreover, the mud claw parts can form anchoring points, further preventing the permanent refractory layer from peeling off.

[0014] In a further optimized technical solution, the cover is equipped with lifting lugs. These lugs facilitate the lifting and use of the ladle cover.

[0015] The beneficial effects of this utility model include: dividing the interior of the cover into multiple filling zones by horizontal and vertical partition beams disperses the concentration of thermal stress under high-temperature conditions, reducing the risk of overall deformation. Simultaneously, the through holes on the horizontal and vertical partition beams allow for physical connections between materials in adjacent filling zones, enabling the refractory material within the filling zones to undergo slight displacement during thermal expansion, thus alleviating thermal stress and enhancing structural integrity. Using a hexagonal mesh as the skeleton of the refractory material, fixed within the filling zones by anchors, forms a three-dimensional mesh support, improving the adhesion of the refractory material and effectively preventing peeling or collapse due to alternating hot and cold temperatures. The hexagonal mesh can absorb mechanical vibration energy through deformation, effectively resisting thermal shock. The composite layered structure of the insulation layer, permanent layer, and working layer significantly improves the thermal insulation performance and durability of the steel cladding cover. Through the above structural synergistic optimization, the problems of traditional cladding covers such as easy cracking, short lifespan, and high maintenance costs can be effectively solved. Attached Figure Description

[0016] Figure 1 is an exploded view of the ladle cover in an embodiment of this utility model.

[0017] Figure 2 is a schematic diagram of the interior of the cover body in an embodiment of this utility model.

[0018] Figure 3 is a schematic diagram of the hexagonal frame connection in an embodiment of this utility model.

[0019] Figure 4 is an overall schematic diagram of the ladle cover in an embodiment of this utility model.

[0020] Reference numerals: 1. Cover; 101. Filling area; 102. Lifting lug; 103. Inward flange; 2. Horizontal and longitudinal dividing beams; 201. Through hole; 3. Tortoise shell mesh; 301. Hexagonal frame; 302. Rectangular hole; 303. Protrusion; 304. Locking part; 305. Mud claw part; 4. Anchor; 401. Straight rod section; 402. V-shaped section; 403. Horizontal rod; 404. Locking hole; 405. Clamping rod; 5. Insulation layer; 6. Permanent layer; 7. Working layer. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on this utility model.

[0024] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please refer to Figures 1 to 4. The durable steel ladle cover disclosed in this utility model includes a cover body 1, which is a cylindrical structure with an open bottom. The open end of the cover body 1 is provided with an inward flange 103, which is integrally formed with the cover body 1. Lifting lugs 102 are provided on the outer periphery or top of the cover body 1 for easy lifting and use. Horizontal and vertical dividing beams 2 are provided inside the cover body 1 to divide the internal space of the cover body 1 into several filling areas 101. Through holes 201 are provided on the side walls of the horizontal and vertical dividing beams 2, connecting two adjacent filling areas 101. The through holes 201 are square holes with a diameter of 500 x 250 mm. Within the several filling areas 101, there are... The cover 1 has a hexagonal wire mesh 3, and several anchors 4 extending towards the opening are provided on the inner top surface of the cover 1. The hexagonal wire mesh 3 is fixed in the filling area 101 by the anchors 4. A heat insulation layer 5 is provided between the inner top surface of the cover 1 and the horizontal and vertical partition beams 2. A permanent layer 6 is provided in the filling area 101, and a working layer 7 is provided on the surface of the permanent layer 6. Specifically, the two ends of the horizontal and vertical partition beams 2 are fixed to the inner peripheral wall of the cover 1, and there is a certain gap between the horizontal and vertical partition beams 2 and the inner top surface of the cover 1. The heat insulation layer 5 is completely filled in the gap. The heat insulation layer 5 is also called the thermal insulation layer. Its main function is to improve the heat insulation capacity, reduce the heat transfer of molten steel to the cover 1, and reduce the heat loss of the cover 1. The permanent layer 6 is also called the permanent lining. A refractory layer is used, which does not come into contact with molten steel and slag; its main function is heat preservation and insulation. The working layer 7, also called the working lining refractory layer, is subject to the impact of molten steel and the erosion of slag. In this embodiment, the interior of the cover 1 is divided into multiple filling zones 101 by the horizontal and vertical partition beams 2, which disperses the concentration of thermal stress under high temperature conditions and reduces the risk of overall deformation. At the same time, the through holes 201 on the horizontal and vertical partition beams 2 allow the materials of adjacent filling zones 101 to form a physical connection, enhancing the overall structural integrity and facilitating casting. Moreover, the through holes 201 allow the permanent layer 6 material in the filling zone 101 to undergo slight displacement when heated, relieving thermal stress. The hexagonal mesh 3 serves as the skeleton of the refractory material. Anchors 4 are fixed within the filling area 101 to form a three-dimensional mesh support, effectively preventing the refractory material of the permanent layer 6 from peeling or collapsing due to alternating hot and cold temperatures. Moreover, the tortoise shell mesh 3 can absorb mechanical vibration energy through deformation, effectively resisting thermal shock. The bottom edge of the working layer 7 is locked by the inward flange 103. When an expansion gap is set between the outer circumference of the working layer 7 and the inner circumference of the cover 1, the overall refractory layer is prevented from falling off. By adopting a composite layered structure of insulation layer 5, permanent layer 6 and working layer 7, the thermal insulation performance and durability of the steel ladle cover are significantly improved. Through the above structural optimization, this utility model can effectively solve the problems of easy cracking, short life and high maintenance cost of traditional cladding covers.

[0026] In a specific example, both the cover 1 and the horizontal and vertical partition beams 2 are made of heat-resistant steel with a thickness of 8-15mm. For example, the cover 1 has a thickness of 8mm, 10mm or 15mm, preferably 10mm; the horizontal and vertical partition beams 2 have a height of 310mm and a thickness of 15mm; the insulation layer 5 has a thickness of 10mm and is made of layers of nano-micromaterial insulation board laid inside the cover 1; the permanent layer 6 has a thickness of 300mm and is made of high-alumina castable, mullite castable or alumina-magnesia castable; the working layer 7 has a thickness of 30mm and is made of magnesia refractory material or magnesia-calcium refractory material.

[0027] In a preferred embodiment, the overall length of the anchor 4 is 325mm. The anchor 4 is made of heat-resistant steel and includes a straight rod section 401 and a V-shaped section 402. One end of the straight rod section 401 is vertically fixed to the inner top surface of the cover 1. The tip of the V-shaped section 402 is fixedly connected to the free end of the straight rod section 401. Horizontal rods 403 extending to both sides are provided at the two open ends of the V-shaped section 402. Two locking holes 404 are provided at intervals on the straight rod section 401. The distance between the two locking holes 404 corresponds to the thickness of the tortoise shell mesh 3 and a dynamic gap of 0.5mm is reserved. A clamping rod 405 is horizontally inserted into the locking hole 404. When installing the hexagonal mesh 3, first insert the clamping rod 405 horizontally into the locking hole 404 near the top of the cover 1. After the mesh of the hexagonal mesh 3 passes through one end of the straight rod section 401 and is secured to the clamping rod 405, insert the clamping rod 405 into the other locking hole 404 to clamp the hexagonal mesh 3 onto the straight rod section 401 of the anchor 4, forming a vertical clamping of the hexagonal mesh 3 to prevent it from falling off and forming a three-dimensional mesh support. Moreover, the clamping rod 405 can be pulled out horizontally. If local damage occurs, the corresponding filler can be removed. After the refractory materials of the working layer 7 and permanent layer 6 at location 101 are replaced, the damaged hexagonal mesh 3 can be replaced locally without the need to completely remove the refractory materials and hexagonal mesh 3, which facilitates later maintenance; the V-shaped section 402 extends into the working layer 7, and its oblique support angle can convert the vertical load into an oblique component force, thereby improving the interface shear strength of the castable material of the working layer 7 and better fixing the castable material of the working layer 7. After the horizontal bar 403 is embedded in the castable material, it forms a mechanical interlock, which can further prevent the refractory material from falling off.

[0028] In a preferred embodiment, the tortoise shell mesh 3 is formed by interlocking several hexagonal frames 301. Each face of the hexagonal frame 301 has a rectangular hole 302, and a protrusion 303 is provided on one side of the rectangular hole 302. The protrusion 303 has a locking part 304 and a claw part 305. When the hexagonal frames 301 are interlocked, the interlocking interfaces fit together, the rectangular holes 302 are aligned, and the protrusions 303 on the hexagonal frames 301 pass through the rectangular holes 302 of the other frame and extend into the other frame. Inside, the locking part 304 is bent 90° to both sides to form an L-shaped clamping structure, which clamps the hexagonal frame 301 to prevent the two hexagonal frames 301 from separating, making it convenient to assemble the hexagonal mesh 3. When pouring refractory material onto the hexagonal mesh 3, the mud claw part 305 extends into each other's mesh to form anchor points, preventing the permanent layer 6 refractory material from peeling off. During pouring, the rectangular hole 302 forms a through-penetration to improve the bonding strength of the refractory interface and further improve durability.

[0029] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A durable ladle shroud characterized by: The device includes a cover, which is a cylindrical structure with an open bottom. The open end of the cover has an inwardly turned-up edge. The interior of the cover has horizontal and vertical partition beams that divide the interior space of the cover into several filling areas. The horizontal and vertical partition beams have through holes. The filling areas are filled with a hexagonal mesh. The inner top surface of the cover has several anchors extending towards the open side. The hexagonal mesh is fixed in the filling areas by the anchors. An insulation layer is provided between the inner top surface of the cover and the horizontal and vertical partition beams. A permanent layer is provided in the filling areas. The surface of the permanent layer has a working layer.

2. The reusable ladle shroud of claim 1, wherein: Both the cover and the transverse and longitudinal dividing beams are made of heat-resistant steel with a thickness of 8-15mm.

3. The durable steel ladle cover as described in claim 1, characterized in that: The insulation layer is 10mm thick and is made by layering nano-micromaterial insulation boards inside the cover.

4. The reusable ladle shroud of claim 1 wherein: The thickness of the permanent layer is 300 mm, and the permanent layer is cast from high-alumina castable, mullite castable, or alumina-magnesia castable.

5. The reusable ladle shroud of claim 1 wherein: The working layer has a thickness of 30 mm and is cast from magnesia refractory material or magnesia-calcium refractory material.

6. The reusable ladle shroud of any one of claims 1 to 5, wherein: The anchor includes a straight rod section and a V-shaped section. One end of the straight rod section is fixed to the inner top surface of the cover. The tip of the V-shaped section is fixedly connected to the free end of the straight rod section. The two open ends of the V-shaped section are respectively provided with horizontal rods.

7. The durable steel ladle cover as described in claim 6, characterized in that: Two locking holes are spaced apart on the straight rod section, and the distance between the two locking holes corresponds to the thickness of the tortoise shell mesh. A clamping rod is horizontally inserted into the locking hole.

8. The durable steel ladle cover as described in claim 7, characterized in that: The overall length of the anchor is 325mm, and the anchor is made of heat-resistant steel.

9. The durable steel ladle cover as described in claim 8, characterized in that: The tortoise shell mesh is formed by interlocking several hexagonal frames. Each face of the hexagonal frame has a rectangular hole, and one side of the rectangular hole has a protrusion. The protrusion has a locking part and a mud claw part.

10. The reusable ladle shroud of claim 9, wherein: The cover is equipped with lifting lugs.

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