Slag line identification brick and steel ladle
By introducing silicon carbide erosion indicator plates into the slag line marking bricks, the problem of difficult to judge the degree of water erosion in the steel is solved, and the accurate replacement of slag line bricks is achieved, avoiding water leakage and resource waste, and reducing the cost of steelmaking.
Patent Information
- Application Number
- CN202422478885.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-14
AI Technical Summary
In the prior art, it is difficult to accurately judge the degree of steel erosion, resulting in the occurrence of water-mill leakage accidents or waste of refractory brick resources, and the cost of steelmaking increases.
The erosion indicator plate made of silicon carbide is combined with the slag line marking brick. The brighter brightness of the silicon carbide is used to judge the residual thickness of the slag line brick by observing the exposed erosion indicator plate to ensure accurate replacement.
It realizes the intuitive, accurate and convenient judgment of slag line bricks, avoids water leakage accidents, and reduces the cost of steelmaking.
Smart Images
Figure CN223210478U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of steelmaking ladle bricks, and in particular to a slag line marking brick and a ladle. Background Art
[0002] A ladle is a container used to transport and pour molten metal. It consists of a steel shell, a refractory lining, and an opening and closing control system. It is usually used in steel mills and foundries to receive molten steel and perform pouring operations in front of open hearths, electric furnaces, or converters.
[0003] Due to the high temperature of the molten steel, the refractory lining will be continuously eroded, especially at the ladle slag line (the part where the molten steel is in direct contact with the air). Due to the temperature difference and the presence of an oxygen-rich environment, the erosion rate is significantly faster than other parts. In addition, the tilting and slag discharge operations of the molten steel during operation continuously erode the slag line bricks. Therefore, when the number of uses increases and the erosion reaches a certain thickness, it is necessary to replace the slag line bricks with new ones. Otherwise, it is easy for molten steel to penetrate into the outer layer of the ladle, resulting in steel leakage accidents.
[0004] At present, the degree of molten steel corrosion is determined by human visual observation and judgment based on experience, which has large errors and is difficult to judge accurately. If the degree of corrosion is too deep and is not replaced in time, it is easy to cause a ladle leakage accident. If the degree of corrosion is shallow, it will waste refractory brick resources and increase steelmaking costs. Utility Model Content
[0005] In order to solve the above technical problems, the first purpose of the present invention is to provide a slag line identification brick; the second purpose of the present invention is to provide a ladle using the above slag line identification brick; the slag line identification brick and ladle provided in this application can help judges to judge the remaining thickness of the slag line brick more intuitively, accurately, conveniently and effectively during use.
[0006] The technical solutions provided by this utility model are as follows:
[0007] A slag line marking brick, wherein an erosion indicator plate is provided in the marking brick body, the erosion indicator plate is parallel to the end face of the marking brick body, and the erosion indicator plate passes through the marking brick body, and the edge of the erosion indicator plate is flush with the edge of the marking brick body;
[0008] The material of the erosion indicator plate is silicon carbide;
[0009] The marking brick body is wedge-shaped, with a large end and a small end at its two ends. The end face widths of the large end and the small end are the same, and the end face length of the large end is greater than that of the small end.
[0010] The distance between the side of the erosion indicator plate close to the big head end and the end face of the big head end is 40-60 mm.
[0011] Preferably, the thickness of the erosion indicator plate is 20-50 mm.
[0012] Preferably, the thickness of the erosion indicator plate is 30-40 mm.
[0013] Preferably, the distance between the side of the erosion indicator plate close to the big head end and the end surface of the big head end is 50-55 mm.
[0014] Preferably, the height of the identification brick body is 200-230 mm.
[0015] A ladle comprises a ladle shell and a refractory lining arranged in the ladle shell, wherein the refractory bricks used for the slag line layer of the refractory lining are any of the slag line marking bricks described above.
[0016] The present application provides a slag line identification brick, in which an erosion indicator plate is provided in the identification brick body. The erosion indicator plate is parallel to the end face of the identification brick body, and the edge of the erosion indicator plate is flush with the edge of the identification brick body. The erosion indicator plate made of silicon carbide has a brighter brightness than refractory bricks when eroded by molten steel. The operator can easily observe and intuitively determine that the slag line brick has been eroded to the specified residual thickness position and the slag line brick needs to be replaced.
[0017] Specifically, the slag line identification bricks provided in the present application are stacked on top of each other when they are first laid in the ladle. At this time, the erosion indicator plate is blocked by other bricks and is not exposed. As the ladle works, the erosion of the identification brick body by the molten steel continues to deepen until the erosion indicator plate is exposed and eroded. Since the erosion indicator plate is made of silicon carbide, it is brighter when eroded, so that it can be clearly and intuitively observed by the staff, and the timing of replacing the slag line bricks can be accurately grasped.
[0018] The slag line identification brick provided in the present application has an edge of an erosion indicator plate flush with the edge of the identification brick body (i.e., the erosion indicator plate penetrates the identification brick body), and the erosion indicator plate is parallel to the end face of the identification brick body. Therefore, no matter how the erosion angle of the slag line brick changes, the erosion indicator plate will be eroded before the inner brick material (i.e., the part of the slag line brick located between the erosion indicator plate and the inner wall of the ladle) and give an indication through brightness, thereby avoiding the accident of the inner brick material eroding the indicator plate before causing leakage of the ladle.
[0019] Furthermore, the identification brick body is wedge-shaped, suitable for being laid inside a circular ladle; the two ends of the identification brick body are correspondingly named the big head end and the small head end, the end face widths of the big head end and the small head end are the same, and the end face length of the big head end is greater than the end face length of the small head end; the side of the erosion indicator plate close to the big head end is 40-60mm away from the end face of the big head end, that is, the thickness of the brick material between the erosion indicator plate and the inner wall of the ladle is 40-60mm. After the erosion indicator plate is eroded and before the slag line bricks are replaced, this part of the brick material can protect the ladle from leakage accidents.
[0020] The present application also provides a ladle, wherein the refractory lining in the ladle shell has a slag line layer in which the refractory bricks used are the slag line marking bricks described in any one of the above items.
[0021] The position of the slag line layer is well known in the art, and is usually located at the 25th to 30th layer of the refractory lining. The ladle provided in this application replaces the traditional slag line bricks with the above-mentioned slag line identification bricks, which can help judges to judge the remaining thickness of the slag line bricks during use more intuitively, accurately, conveniently and effectively. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0023] Figure 1 This is a schematic diagram of the structure of the slag line marking brick in the embodiment of the present utility model;
[0024] Figure 2 This is a schematic structural diagram of the ladle in an embodiment of the present utility model;
[0025] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;
[0026] Reference numerals: 1 - identification brick body; 11 - large end; 12 - small end; 2 - erosion indicator plate; 3 - ladle shell; 4 - refractory lining. DETAILED DESCRIPTION
[0027] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.
[0028] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.
[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.
[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.
[0032] As shown in the figure, the embodiment of the present invention provides a slag line marking brick. An erosion indicator plate 2 is provided in the marking brick body 1. The erosion indicator plate 2 is parallel to the end surface of the marking brick body 1, and the erosion indicator plate 2 passes through the marking brick body 1. The edge of the erosion indicator plate 2 is flush with the edge of the marking brick body 1.
[0033] The material of the erosion indicator plate 2 is silicon carbide;
[0034] The marking brick body 1 is wedge-shaped, with a large end 11 and a small end 12 at its two ends. The end face widths of the large end 11 and the small end 12 are the same, and the end face length of the large end 11 is greater than the end face length of the small end 12.
[0035] The distance between the side of the erosion indicator plate 2 close to the big end 11 and the end surface of the big end 11 is 40-60 mm.
[0036] The present application provides a slag line identification brick, in which an erosion indicator plate 2 is provided in the identification brick body 1. The erosion indicator plate 2 is parallel to the end face of the identification brick body 1, and the edge of the erosion indicator plate 2 is flush with the edge of the identification brick body 1. The erosion indicator plate 2 is made of silicon carbide and has a brighter brightness than refractory bricks when eroded by molten steel. The operator can easily observe and intuitively determine that the slag line brick has been eroded to the specified residual thickness position and the slag line brick needs to be replaced.
[0037] Specifically, when the slag line identification bricks provided in the present application are just laid in the ladle, multiple bricks are stacked on each other, and at this time the erosion indicator plate 2 is blocked by other bricks and is not exposed; as the ladle works, the erosion of the identification brick body 1 by the molten steel continues to deepen until the erosion indicator plate 2 is exposed and eroded. Since the erosion indicator plate 2 is made of silicon carbide, it is brighter when eroded, so that it can be clearly and intuitively observed by the staff, and the timing of replacing the slag line bricks can be accurately grasped.
[0038] The slag line identification brick provided in the present application has an edge of the erosion indicator plate 2 flush with the edge of the identification brick body 1 (i.e., the erosion indicator plate 2 penetrates the identification brick body 1), and the erosion indicator plate 2 is parallel to the end face of the identification brick body 1. Therefore, no matter how the erosion angle of the slag line brick changes, the erosion indicator plate 2 will be eroded before the inner brick material (i.e., the part of the slag line brick located between the erosion indicator plate 2 and the inner wall of the ladle) and give an indication through brightness, thereby avoiding the accident of the inner brick material eroding the indicator plate 2 before causing leakage of the ladle.
[0039] Furthermore, the identification brick body 1 is wedge-shaped, suitable for being laid inside a circular ladle; the two ends of the identification brick body 1 are correspondingly named the big end 11 and the small end 12, the end face widths of the big end 11 and the small end 12 are the same, and the end face length of the big end 11 is greater than the end face length of the small end 12; the side of the erosion indicator plate 2 close to the big end 11 is 40-60mm away from the end face of the big end 11, that is, the thickness of the brick material between the erosion indicator plate 2 and the inner wall of the ladle is 40-60mm. After the erosion indicator plate 2 is eroded and before the slag line bricks are replaced, this part of the brick material can protect the ladle from leakage accidents.
[0040] The slag line identification bricks provided in the present application can be manufactured by the sandwich masonry method well known in the art. Silicon carbide plates, as a high-performance industrial ceramic material, have the characteristics of high strength, high hardness, high wear resistance, no breakage during long-term high-temperature use, no bending and deformation, corrosion resistance, high temperature resistance, oxidation resistance, resistance to rapid cooling and heating, good thermal shock resistance, good thermal conductivity and high thermal efficiency. They can ensure that the identification brick body 1 located on both sides of the erosion indicator plate 2 is firmly connected to the erosion indicator plate 2 during normal working process and is not easy to fall off.
[0041] Silicon carbide, as the erosion indicator plate 2, is added to the identification brick and has the following beneficial effects:
[0042] First, improve high temperature resistance. The addition of silicon carbide plates can significantly improve the high temperature resistance of magnesia carbon bricks, enabling them to maintain stable physical and chemical properties in high temperature environments, thereby extending their service life.
[0043] Second, it enhances wear resistance. The extremely high hardness of silicon carbide plates can effectively resist wear, thereby reducing the wear of magnesia carbon bricks during use and maintaining the stability of their shape and size.
[0044] Third, improve corrosion resistance: Silicon carbide plates have good corrosion resistance and can resist the erosion of various chemical substances, protecting magnesium carbon bricks from corrosion in complex environments.
[0045] Fourth, optimize thermal conductivity: The addition of silicon carbide plates can improve the thermal conductivity of magnesia carbon bricks, increase thermal efficiency, facilitate rapid heat dissipation, and avoid local overheating.
[0046] Preferably, the thickness of the erosion indicator plate 2 is 20-50 mm.
[0047] Preferably, the thickness of the erosion indicator plate 2 is 30-40 mm.
[0048] The erosion indicator plate 2 preferably has a thickness of 20-50 mm, more preferably 30-40 mm. The application of silicon carbide plates in magnesia-carbon bricks primarily improves the bricks' high-temperature resistance, wear resistance, and corrosion resistance. Furthermore, a thickness of 20-50 mm, more preferably 30-40 mm, can achieve higher strength, higher hardness, and greater wear resistance. It is also less likely to break or deform under long-term high-temperature use, resulting in improved corrosion and high-temperature resistance.
[0049] Preferably, the distance between the side of the erosion indicator plate 2 close to the big head end 11 and the end surface of the big head end 11 is 50-55 mm.
[0050] More preferably, the distance between the side of the erosion indicator plate 2 close to the big head end 11 and the end surface of the big head end 11 is 50-55 mm.
[0051] Preferably, the height of the identification brick body 1 is 200-230 mm.
[0052] The height of the marker brick body 1 is preferably 200-230mm (i.e., the vertical distance between the end face of the large end 11 and the small end 12). Considering the height of the marker brick body 1 and the distance between the erosion indicator plate 2 and the large end 11, it can be seen that the brick material distribution on both sides of the erosion indicator plate 2 is more on the small end 12 side than on the large end 11 side. Because the small end 12 is located closer to the center of the ladle and is eroded first, the replacement frequency of the slag line bricks can be minimized while ensuring the safety of the ladle, thereby reducing costs.
[0053] A ladle comprises a ladle shell 3 and a refractory lining 4 arranged in the ladle shell 3. The refractory bricks used in the slag line layer of the refractory lining 4 are any of the slag line marking bricks described above.
[0054] The present application also provides a ladle, wherein the refractory lining 4 in the ladle shell 3 has a slag line layer in which the refractory bricks used are the slag line marking bricks described in any one of the above items.
[0055] The position of the slag line layer is well known in the art, and is usually located at the 25th to 30th layers of the refractory lining 4. The ladle provided in this application replaces the traditional slag line bricks with the above-mentioned slag line identification bricks, which can help judges to judge the remaining thickness of the slag line bricks during use more intuitively, accurately, conveniently and effectively.
[0056] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A slag line marking brick, characterized in that: An erosion indicator plate (2) is provided in the marking brick body (1), the erosion indicator plate (2) is parallel to the end face of the marking brick body (1), and the erosion indicator plate (2) passes through the marking brick body (1), and the edge of the erosion indicator plate (2) is flush with the edge of the marking brick body (1); The material of the erosion indicator plate (2) is silicon carbide; The marking brick body (1) is wedge-shaped, and its two ends are respectively a large head end (11) and a small head end (12), the end face widths of the large head end (11) and the small head end (12) are the same, and the end face length of the large head end (11) is greater than the end face length of the small head end (12); The distance between the side of the erosion indicator plate (2) close to the big head end (11) and the end face of the big head end (11) is 40-60 mm.
2. The slag line marking brick according to claim 1, characterized in that: The thickness of the erosion indicator plate (2) is 20-50 mm.
3. The slag line marking brick according to claim 2, characterized in that: The thickness of the erosion indicator plate (2) is 30-40 mm.
4. The slag line marking brick according to claim 1, characterized in that: The distance between the side of the erosion indicator plate (2) close to the big head end (11) and the end face of the big head end (11) is 50-55 mm.
5. The slag line marking brick according to claim 1, characterized in that: The height of the marking brick body (1) is 200-230 mm.
6. A ladle comprising a ladle shell (3) and a refractory lining (4) arranged in the ladle shell (3), characterized in that: The refractory bricks used in the slag line layer of the refractory lining (4) are the slag line marking bricks described in any one of claims 1 to 5.