A ladle can along masonry structure and construction method

Abstract

A ladle shell lining structure and construction method, relates to the field of steelmaking. The ladle shell lining structure is arranged on the ladle pouring material permanent layer and the ladle slag line brick top inside the ladle shell, which comprises a ring-shaped ladle pressing brick plate connected to the inner wall of the ladle shell, a ring-shaped shell lining brick layer and a shell lining pouring material layer arranged on the top of the ladle slag line brick, the outer wall bottom of the shell lining brick layer is attached to the inner wall of the ladle pouring material permanent layer, the top of the outer wall of the shell lining brick layer is inwardly recessed to form a gap, the inner wall of the ladle pressing brick plate extends above the gap and is connected to a plurality of heat-developing marking blocks, the top surface of the ladle pressing brick plate, the marking blocks and the shell lining brick layer are flush, and the shell lining pouring material layer covers the top surface of the ladle pouring material permanent layer and the shell lining brick layer and wraps the ladle pressing brick plate and the marking blocks. The ladle shell lining structure and construction method provide a shell lining structure that can prevent ring joints from being generated and sticking to slag, and make it easy for workers to observe and repair when the shell lining and slag line are eroded to the lower limit of the safe thickness.

Description

Technical Field

[0001] This application relates to the field of steelmaking, and more specifically, to a ladle rim construction structure and construction method. Background Technology

[0002] With the continuous development of steelmaking technology and the development plan of carbon peaking and carbon neutrality, reducing iron consumption and increasing the use of scrap steel in ladle furnace processes have become the main development direction for steel plants.

[0003] However, in actual operation, it was found that increasing the amount of scrap steel used in the ladle furnace process can easily lead to unstable control of the liquid level in the ladle, resulting in excessively high liquid levels in some furnaces and accelerated erosion of the ladle rim. The increased heating ratio in the ladle furnace further exacerbates the abnormal erosion of the ladle rim. On the other hand, slag is prone to accumulate at the ladle rim. Treating the accumulated slag can easily cause circumferential cracks or damage to the slag line bricks, leading to steel penetration at the ladle rim or slag line bricks, which seriously affects the safe operation of the liquid ladle. In particular, the ladle slag line is constructed with a mixture of castable refractory and slag line bricks, making it difficult to maintain a stable overall furnace lining structure. Under conditions of rapid erosion and slag buildup at the ladle rim, it is difficult to quickly and accurately determine the residual thickness of the furnace lining, often resulting in excessive erosion before it is discovered, increasing production risks and maintenance costs. Summary of the Invention

[0004] The purpose of this application is to provide a rim masonry structure and construction method for a steel ladle tank. The provided rim masonry structure can prevent circumferential joints and slag adhesion, and facilitates observation and maintenance by operators when the rim and slag line are eroded to the lower limit of the safe thickness.

[0005] This application is implemented as follows:

[0006] This application provides a rim construction structure for a ladle tank, comprising a permanent layer of ladle castable refractory and a top layer of ladle slag line bricks located inside the ladle tank shell. The structure includes an annular ladle pressing brick plate connected to the inner wall of the ladle tank shell, an annular rim brick layer located on top of the ladle slag line bricks, and a rim castable refractory layer. The bottom of the outer wall of the rim brick layer is attached to the inner wall of the permanent layer of ladle castable refractory. The top of the outer wall of the rim brick layer is recessed inward to form a notch. The inner wall of the ladle pressing brick plate extends above the notch and is connected to multiple color-changing marker blocks. The top surfaces of the ladle pressing brick plate, marker blocks, and rim brick layer are flush. The rim castable refractory layer covers the permanent layer of ladle castable refractory and the top surface of the rim brick layer, and wraps around the ladle pressing brick plate and marker blocks.

[0007] In some alternative implementations, multiple reinforcing ribs are embedded in the refractory layer along the tank rim, with one end and the bottom of the reinforcing ribs connected to the inner wall of the ladle tank shell and the top surface of the ladle pressing brick plate, respectively.

[0008] In some alternative implementations, multiple anchors embedded in the castable lining layer are connected to both sides of the reinforcing rib.

[0009] In some alternative implementations, the anchors are Z-shaped, V-shaped, or Y-shaped.

[0010] In some alternative implementations, the ladle pressing plate has multiple pouring holes.

[0011] In some alternative implementations, multiple pouring holes are arranged at circumferential intervals along the ladle pressing brick plate.

[0012] In some alternative implementations, multiple marker blocks are arranged at circumferential intervals along the ladle pressing brick plate.

[0013] This application also provides a method for constructing the rim masonry structure of a steel ladle tank, which includes the following steps:

[0014] A ring-shaped ladle pressing brick plate is welded at a predetermined position on the inner wall of the ladle tank shell. The inner wall of the ladle pressing brick plate is connected to multiple indicator blocks that show color when heated.

[0015] An L-shaped rim brick is built on top of the ladle slag line brick to form an annular rim brick layer with a notch at the top of the outer wall. The bottom of the outer wall of the rim brick layer is attached to the inner wall of the permanent layer of ladle castable. The inner wall of the ladle pressing brick plate extends to the top of the notch, and the top surfaces of the ladle pressing brick plate, the marker block and the rim brick layer are flush.

[0016] The casting process produces a permanent layer of ladle castable material covering the top surface of the ladle rim brick layer and enclosing the ladle pressure brick plate and marker block.

[0017] In some alternative implementations, before the lining layer of the ladle is poured, multiple reinforcing ribs are welded to the top surface of the ladle press brick plate, and one end of the reinforcing ribs is welded and fixed to the ladle shell.

[0018] In some alternative implementations, multiple anchors are connected to both sides of the reinforcing rib before the rim castable layer is poured.

[0019] The beneficial effects of this application are as follows: The ladle tank rim masonry structure provided by this application is located on the top of the permanent layer of ladle castable and the ladle slag line bricks inside the ladle tank shell. It includes an annular ladle pressing brick plate connected to the inner wall of the ladle tank shell, an annular rim brick layer and a rim castable layer located on the top of the ladle slag line bricks. The bottom of the outer wall of the rim brick layer is attached to the inner wall of the permanent layer of ladle castable. The top of the outer wall of the rim brick layer is recessed inward to form a notch. The inner wall of the ladle pressing brick plate extends above the notch and is connected to multiple color-changing marker blocks when heated. The top surfaces of the ladle pressing brick plate, the marker blocks and the rim brick layer are flush. The rim castable layer covers the top surface of the permanent layer of ladle castable and the rim brick layer and wraps the ladle pressing brick plate and the marker blocks. The ladle rim masonry structure and construction method provided in this application can provide a rim masonry structure that prevents the formation of circumferential joints in the working layer and avoids slag adhesion, and can facilitate observation and maintenance by operators when the rim and slag line are eroded to the lower limit of the safe thickness. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A partial cross-sectional view of the ladle tank rim masonry structure provided in this embodiment of the application when it is located at the top of the ladle tank shell;

[0022] Figure 2 A partial structural diagram showing the connection between the ladle pressing brick plate, the marker block, and the reinforcing rib plate in the ladle rim masonry structure provided in this embodiment of the application.

[0023] Figure 3 A perspective structural diagram showing the connection between the reinforcing ribs and anchors in the rim masonry structure of the ladle tank provided in this application embodiment.

[0024] In the diagram: 100, steel ladle shell; 110, permanent layer of steel ladle castable; 120, steel ladle slag line brick; 200, steel ladle pressure brick plate; 210, rim brick layer; 220, rim castable layer; 230, notch; 240, marker block; 250, reinforcing rib plate; 260, anchor; 270, pouring hole; 280, rim brick. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The following describes in further detail the features and performance of the ladle rim masonry structure and construction method of the steel ladle tank of this application, with reference to the embodiments.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, this application embodiment provides a ladle tank rim masonry structure, which is provided on the top of the ladle tank shell 100. The inner wall of the ladle tank shell 100 is provided with a ladle castable permanent layer 110, and the inner wall of the ladle castable permanent layer 110 is provided with an annular refractory lining formed by ladle slag line bricks 120. The ladle tank rim construction structure provided in this embodiment includes a ladle pressing brick plate 200, a rim brick layer 210, and a rim castable refractory layer 220. The ladle pressing brick plate 200 is an annular steel plate with its outer wall fixedly welded to the top of the inner wall of the ladle tank shell 100. Twelve reinforcing ribs 250 are fixedly welded to the top surface of the ladle pressing brick plate 200, spaced circumferentially. One end and bottom of the reinforcing ribs 250 are connected to the inner wall of the ladle tank shell 100 and the top surface of the ladle pressing brick plate 200, respectively. The other end of the reinforcing ribs 250 is flush with the inner wall of the ladle pressing brick plate 200 along its height. Seven Y-shaped anchors 260 are connected to both sides of each reinforcing rib 250. Twenty-one casting holes 270 are also provided on the ladle pressing brick plate 200, spaced circumferentially. The rim brick layer 210 is annular and located on top of the refractory lining. The bottom of the outer wall of the 0 is attached to the top of the inner wall of the permanent layer 110 of the ladle castable. The top of the outer wall of the rim brick layer 210 is recessed inward to form a notch 230. The rim brick layer 210 is constructed by rim bricks 280 with an L-shaped longitudinal section. The inner wall of the ladle pressing brick plate 200 extends above the notch 230 and is connected to fourteen marker blocks 240. The fourteen marker blocks 240 are arranged at intervals along the circumference of the ladle pressing brick plate 200. The marker blocks 240 are made of cast iron. The top surfaces of the ladle pressing brick plate 200, the marker blocks 240 and the rim brick layer 210 are flush in the horizontal direction. The rim castable layer 220 covers the top surface of the permanent layer 110 of the ladle castable and the top surface of the rim brick layer 210 and wraps the ladle pressing brick plate 200, the marker blocks 240, the reinforcing rib plate 250 and the anchor 260. There is a 50mm gap between the rim brick layer 210 and the ladle pressing brick plate 200.

[0034] This application also provides a construction method for the rim masonry structure of the aforementioned steel ladle tank, which includes the following steps:

[0035] A ring-shaped ladle pressing brick plate 200 is welded at a predetermined position on the inner wall of the ladle tank shell 100. Fourteen marker blocks 240 are connected to the inner wall of the ladle pressing brick plate 200 at intervals along its circumference. Twenty-one pouring holes 270 are opened on the ladle pressing brick plate 200 at intervals along its circumference.

[0036] Fourteen reinforcing ribs 250 are welded to the top surface of the ladle pressing brick plate 200, arranged at intervals along its circumference. One end and the bottom of the reinforcing ribs 250 are welded and fixed to the inner wall of the ladle tank shell 100 and the top surface of the ladle pressing brick plate 200, respectively. Seven Y-shaped anchors 260 are welded to both sides of the reinforcing ribs 250.

[0037] An L-shaped rim brick 280 is built on top of the ladle slag line brick 120 to form an annular rim brick layer 210 with a notch 230 formed by a recess at the top of the outer wall. The bottom of the outer wall of the rim brick layer 210 is attached to the inner wall of the ladle castable permanent layer 110. The inner wall of the ladle pressing brick plate 200 extends above the notch 230, and the top surfaces of the ladle pressing brick plate 200, the marker block 240 and the rim brick layer 210 are flush.

[0038] Install the rim casting mold. After brushing oil on the surface of the rim casting mold, install it and place it on the upper part of the rim brick layer 210. Ensure that the rim casting mold and the steel ladle shell 100 are at the same distance. The rim casting material is poured into the lower space of the steel ladle brick layer 200 through the gap between the rim brick layer 210 and the steel ladle pressing brick plate 200 and the reserved pouring hole 270 on the steel ladle pressing brick plate 200, and then into the top surface of the permanent layer 110 of the steel ladle casting material and the top surface of the rim brick layer 210. The material is poured and vibrated with a vibrator. Finally, it solidifies to form the rim casting material layer 220, which wraps the steel ladle pressing brick plate 200, the marker block 240, the reinforcing rib plate 250, and the anchor 260 to form the whole rim of the steel ladle.

[0039] The ladle tank rim construction structure and construction method provided in this application, by setting a ladle pressure brick plate 200, reinforcing rib plate 250, marker block 240, rim brick layer 210 and rim castable layer 220 on the top of the ladle tank shell 100, can effectively prevent rim erosion, reduce circumferential cracks and slag adhesion and hanging problems, and facilitate workers to observe and repair when the rim and slag line erosion reaches the lower limit of the safe thickness.

[0040] In this process, the ladle pressing brick plate 200 and the ladle edge brick layer 210 are cast into a whole by pouring the castable refractory layer 220 to form the ladle pressing brick layer 200. The annular ladle pressing brick plate 200 is welded at a predetermined position on the inner wall of the ladle shell 100. The ladle edge brick 280 with an L-shaped longitudinal section is built on the top of the ladle slag line brick 120 to form an annular ladle edge brick layer 210 with a notch 230 formed by the concave top of the outer wall. This allows the inner wall of the ladle pressing brick plate 200 to extend above the notch 230. On the one hand, the ladle pressing brick plate 200 extending above the notch 230 can solve the problems of ladle edge erosion and slag adhesion. On the other hand, the L-shaped ladle edge brick 280 and the ladle slag line brick 120 are made of the same material, magnesia-carbon slag line brick, and have the same shrinkage coefficient, which can avoid the formation of annular seams. The ladle pressing brick plate 200 has casting holes 270 spaced out along its circumference, facilitating the flow of castable refractory into the space beneath it. This allows the ladle pressing brick plate 200 and the tank rim brick layer 210 to be cast into a single unit, ensuring the density and structural stability of the tank rim castable layer 220. The gap between the ladle pressing brick plate 200 and the tank rim brick layer 210 also ensures that the tank rim castable refractory flows into the space beneath the ladle pressing brick plate 200, while allowing the vibrator to extend and ensure the compaction of the tank rim castable refractory through vibration. The ladle pressing brick plate 200 exerts force on the tank rim brick layer 210 through the tank rim castable refractory, with all forces acting vertically downwards, effectively preventing the formation of circumferential seams on the working side.

[0041] Marker blocks 240 are fixedly welded to the inner wall of the ladle pressing brick plate 200 at intervals. After the ladle edge and slag line are eroded to the lower limit of the safe thickness, the marker blocks 240 will be exposed. At high temperature, the brightness of the marker blocks 240 is significantly different from that of the furnace lining refractory material, making it easy for operators to observe with the naked eye. This makes it convenient for operators to judge the erosion of the ladle edge and slag line and carry out maintenance. During maintenance, only the burnt marker blocks 240 and refractory material need to be replaced. The ladle pressing brick plate 200 can be reused.

[0042] After the ladle pressing brick plate 200 is fixed to the inner wall of the ladle tank shell 100, reinforcing ribs 250 arranged circumferentially are welded to the top surface of the ladle pressing brick plate 200. One end and the bottom of the reinforcing ribs 250 are welded and fixed to the inner wall of the ladle tank shell 100 and the top surface of the ladle pressing brick plate 200, respectively. Y-shaped anchors 260 are welded to both sides of the reinforcing ribs 250. The ladle edge castable layer 220 wraps the ladle pressing brick plate 200, the marker block 240, the reinforcing ribs 250, and the anchors 260 to form the ladle edge as a whole. The reinforcing ribs 250 and the anchors 260 improve the structural stability and overall structural strength of the connection between the ladle pressing brick plate 200, the ladle edge brick layer 210, and the ladle edge castable layer 220. The whole ladle edge works together to support the working layer bricks of the ladle, preventing the formation of circumferential joints in the working layer and avoiding slag adhesion at the ladle edge.

[0043] In other optional embodiments, the number and shape of the anchors 260 can be adjusted as needed, with the number being ten or less and the shape being Z-shaped, V-shaped, or other irregular shapes. In other optional embodiments, the number of the marker blocks 240, reinforcing ribs 250, and casting holes 270 can also be adjusted as needed.

[0044] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A ladle shell construction method of a ladle shell construction structure of a ladle shell construction structure provided at a permanent layer of a ladle castable on an inner side of a ladle shell and a top of a ladle slag line brick, characterized by, The ladle ring construction comprises a ring-shaped ladle pressing brick connected to the inner wall of the ladle shell, a ring-shaped ring brick layer arranged on the top of the ladle slag line brick, and a ring pouring material layer, the outer wall bottom of the ring brick layer is attached to the inner wall of the ladle permanent pouring material layer, the outer wall top of the ring brick layer is inwardly recessed to form a gap, the inner wall of the ladle pressing brick extends above the gap and is connected with a plurality of heat-activated marking blocks, the top surfaces of the ladle pressing brick, the marking blocks and the ring brick layer are flush, the ring pouring material layer covers the top surfaces of the ladle permanent pouring material layer and the ring brick layer and wraps the ladle pressing brick and the marking blocks, a plurality of reinforcing rib plates are embedded in the ring pouring material layer, one end and the bottom of the reinforcing rib plates are connected with the inner wall of the ladle shell and the top surface of the ladle pressing brick respectively, a plurality of anchor fasteners embedded in the ring pouring material layer are connected to the two sides of the reinforcing rib plates respectively, and a plurality of pouring holes are arranged on the ladle pressing brick. ​ The ladle ring construction construction method comprises the following steps: welding a ring-shaped ladle pressing brick on the inner wall of the ladle shell at a predetermined position, and connecting a plurality of heat-activated marking blocks to the inner wall of the ladle pressing brick; arranging a ring-shaped ring brick layer with an L-shaped longitudinal section on the top of the ladle slag line brick to form a gap on the top of the outer wall, attaching the outer wall bottom of the ring brick layer to the inner wall of the ladle permanent pouring material layer, extending the inner wall of the ladle pressing brick above the gap, and making the top surfaces of the ladle pressing brick, the marking blocks and the ring brick layer flush; welding a plurality of reinforcing rib plates on the top surface of the ladle pressing brick, welding one end of the reinforcing rib plates to the ladle shell, connecting a plurality of anchor fasteners to the two sides of the reinforcing rib plates respectively, and pouring a ring pouring material layer covering the top surfaces of the ladle permanent pouring material layer and the ring brick layer and wrapping the ladle pressing brick and the marking blocks.

2. The ladle-shelf construction method according to claim 1, characterized by, The anchor fasteners are Z-shaped, V-shaped or Y-shaped.

3. The ladle-shelf masonry construction method according to claim 1, characterized by, A plurality of pouring holes are arranged on the ladle pressing brick in a circumferential direction.

4. The ladle-shelf masonry construction method according to claim 1, characterized by A plurality of marking blocks are arranged on the ladle pressing brick in a circumferential direction.

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