Masonry structure of hot-metal bottle

Abstract

The utility model relates to a masonry structure of a hot-metal ladle. A fan-shaped bulge is formed in the middle of a fan-shaped surface of a refractory brick at the bottom of the ladle; the method comprises the following steps: planishing the bottom of a hot-metal ladle by using a spray coating, annularly laying ladle bottom refractory bricks on the bottom of the hot-metal ladle, enabling the outer sides of the ladle bottom refractory bricks to be propped against the wall of the hot-metal ladle, forming a space on the inner sides, arranging a refractory material at the bottom and arranging a refractory part at the top, and tightly connecting and forming a whole through masonry, thereby enhancing the anti-scouring capability; the adjacent tank bottom refractory bricks are arranged in a positive and negative staggered mode, specifically, the fan-shaped protrusions on one tank bottom refractory brick face upwards, the fan-shaped protrusions on the adjacent tank bottom refractory bricks face downwards, the side faces of the fan-shaped protrusions abut against the side faces of the adjacent tank bottom refractory bricks on the two sides, and the corresponding fan-shaped surfaces of the adjacent tank bottom refractory bricks abut against each other; therefore, the length of the formed gap is shortened, and the scouring abrasion of high-temperature molten iron to the bottom of the molten iron tank is reduced.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, and in particular to a masonry structure for molten iron ladles. Background Technology

[0002] A molten iron ladle is a container used for holding and transporting liquid metal during the ferroalloy smelting process. It is usually cylindrical with an outer shell welded from steel plates and an interior lined with high-temperature resistant materials. The masonry structure inside the molten iron ladle is crucial for ensuring production safety and extending the service life of the equipment. Currently, the masonry structure inside the molten iron ladle mainly relies on the layering of refractory materials, using dry or wet masonry methods, forming a solid overall structure through the combination of refractory bricks and refractory mortar. The masonry structure at the bottom of the molten iron ladle (10) plays a very important role in the transportation of molten iron. It is often subjected to scouring by the high-temperature molten iron, causing wear and even leading to leaks. In addition, the brick joints are more prone to significant wear under the scouring of molten iron.

[0003] Chinese utility model patent CN220445042U discloses a refractory lining for the bottom of a molten iron pipe ladle. The design utilizes prefabricated fan-shaped refractory bricks, polygonal refractory materials, and circular refractory components, facilitating their assembly without cutting and reducing the number of joints. This reduces the wear and tear on the ladle bottom caused by the high-temperature molten iron. The double-layered, staggered arrangement of the polygonal refractory materials and circular refractory components enhances the lining's erosion resistance. However, in this design, adjacent fan-shaped refractory bricks are connected via inserts and slots, resulting in relatively long gaps and a less effective reduction in wear and tear caused by the high-temperature molten iron. Utility Model Content

[0004] The technical problem this invention aims to solve is that the existing refractory lining of the bottom of molten iron tubs uses adjacent fan-shaped refractory bricks connected by inserts and slots, resulting in a long gap and poor effect on reducing wear and tear on the bottom of the tub caused by high-temperature molten iron.

[0005] To address the aforementioned problems, this utility model provides a construction structure for a molten iron ladle. The bottom of the ladle is annularly covered with multiple refractory bricks. The horizontal cross-section of each refractory brick is fan-shaped. The bottom of the inner side of the refractory brick is provided with refractory material, and the top is provided with refractory components. A fan-shaped protrusion is formed in the middle of one fan-shaped surface of the refractory brick, making the cross-section of the refractory brick perpendicular to its radial direction T-shaped. The thickness of the refractory brick is equal to the thickness of the fan-shaped protrusion, and the fan-shaped surface area of ​​the refractory brick is three times the fan-shaped surface area of ​​the fan-shaped protrusion.

[0006] The molten iron ladle construction structure provided by this utility model also has the following technical features:

[0007] The inner side of the refractory brick at the bottom of the tank is an arc surface, and the refractory material and refractory parts are circular in shape to match the arc surface.

[0008] The thickness of the refractory brick at the bottom of the tank is equal to the sum of the thicknesses of the refractory material and the refractory components.

[0009] The inner sides of the refractory bricks at the bottom of the tank are chamfered, and the lower edge of the refractory material and the upper edge of the refractory component are respectively provided with annular protrusions.

[0010] The molten iron ladle has a refractory layer on its wall, and a curing layer is provided on the inner side of the refractory layer.

[0011] This invention has the following beneficial effects: The bottom of the molten iron ladle is leveled using a spray coating, and the refractory bricks are laid in a ring around the bottom of the ladle, so that the outer side of the refractory bricks abuts against the ladle wall, while the inner side forms a space. Refractory material is placed at the bottom and refractory components at the top, and the bricks are tightly connected and formed as a whole, enhancing the erosion resistance. Adjacent refractory bricks are arranged in an alternating pattern; specifically, the fan-shaped protrusions on one refractory brick face upwards, and the fan-shaped protrusions on adjacent refractory bricks face downwards, with the sides of the fan-shaped protrusions abutting against the sides of the adjacent refractory bricks on both sides, and the corresponding fan-shaped surfaces of adjacent refractory bricks abutting against each other, thereby shortening the length of the gap and reducing the wear and tear on the bottom of the molten iron ladle caused by the high-temperature molten iron. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is an axonometric view of the tank bottom lining;

[0014] Figure 3 for Figure 2 Exploded view of the parts;

[0015] Figure 4 This is a schematic diagram of the refractory brick structure at the bottom of the tank. Detailed Implementation

[0016] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0017] like Figures 1 to 4As shown, the construction structure of the molten iron ladle of this utility model includes a ring-shaped arrangement of multiple bottom refractory bricks 11 at the bottom of the ladle 10. The horizontal cross-section of the bottom refractory bricks 11 is fan-shaped. The bottom of the inner side of the bottom refractory bricks 11 is provided with refractory material 12, and the top is provided with refractory components 13. A fan-shaped protrusion 14 is formed in the middle of one fan-shaped surface of the bottom refractory brick 11, so that the cross-section of the bottom refractory brick 11 perpendicular to its radial direction is T-shaped. The thickness of the bottom refractory brick 11 is equal to the thickness of the fan-shaped protrusion 14, and the fan-shaped surface area of ​​the bottom refractory brick 11 is three times the fan-shaped surface area of ​​the fan-shaped protrusion 14.

[0018] The bottom of the molten iron ladle 10 is leveled using a spray coating. Refractory bricks 11 are then laid in a ring around the bottom of the molten iron ladle 10, with the outer side of the refractory bricks 11 abutting against the ladle wall and the inner side forming a space. Refractory material 12 is placed at the bottom and refractory components 13 are placed at the top. These are then tightly connected and integrated through masonry to enhance erosion resistance. Adjacent refractory bricks 11 are arranged in an alternating pattern. Specifically, the fan-shaped protrusions 14 on one refractory brick 11 face upwards, while the fan-shaped protrusions 14 on adjacent refractory bricks face downwards. The sides of the fan-shaped protrusions 14 abut against the sides of the adjacent refractory bricks 11 on both sides, and the corresponding fan-shaped surfaces of adjacent refractory bricks abut against each other, thereby shortening the length of the gap and reducing the wear and tear on the bottom of the molten iron ladle 10 caused by the high-temperature molten iron.

[0019] In this design, a fan-shaped protrusion 14 is located in the middle of the refractory brick 11 at the bottom of the ladle, forming a T-shape with a fan-shaped surface and both sides of the brick. This creates a slotted or insert-like structure for the refractory bricks. During the sequential installation of the refractory bricks 11 into the ladle body, the fan-shaped protrusion 14 of the last refractory brick is positioned downwards to facilitate placement and installation. This solves the problem in existing technologies where the inserts of the refractory bricks 11 engage with the slots of adjacent bricks, making it difficult to install the last refractory brick at the bottom of the ladle. Furthermore, the refractory bricks 11 used in this invention are produced using specific molds, and each fan-shaped brick has only one fan-shaped protrusion 14, resulting in a simple structure. In practical applications, they can be used in reverse configurations, significantly reducing manufacturing difficulty, production costs, and operational complexity. The overall thickness of the refractory bricks 11 at the bottom of the pot and the fan-shaped protrusions 14 can be selected and set according to the requirements. For example, the overall thickness can be increased to improve the overall strength of the masonry structure and prevent molten iron from seeping into the brick joints.

[0020] Preferably, the inner side of the refractory brick 11 at the bottom of the tank is an arc surface, and the refractory material 12 and the refractory component 13 are circular in shape to match the arc surface.

[0021] After the bottom refractory bricks 11 of the molten iron ladle 10 are laid in a ring shape, the circular refractory materials 12 and refractory components 13 are laid in sequence on the inner side of the bottom refractory bricks 11 to form a tightly connected whole, which facilitates the construction process.

[0022] Preferably, the thickness of the refractory brick 11 at the bottom of the tank is equal to the sum of the thicknesses of the refractory material 12 and the refractory component 13.

[0023] This ensures that the upper surface of the refractory brick 11 at the bottom of the ladle is flush with the upper surface of the refractory component 13, reducing the wear and tear on the bottom of the ladle 10 caused by the high-temperature molten iron.

[0024] Preferably, the upper and lower edges of the inner side of the refractory brick 11 at the bottom of the tank are both chamfered 15, and the lower edge of the refractory material 12 and the upper edge of the refractory component 13 are both provided with annular protrusions 16.

[0025] During construction, the refractory material 12 can be placed at the center of the bottom of the molten iron ladle 10, and then the bottom refractory bricks 11 can be placed in sequence, so that the chamfer 15 of the inner lower edge of the bottom refractory brick 11 can be engaged with the annular protrusion 16 of the lower edge of the refractory material 12. Then, the refractory component 13 can be placed on top of the refractory material 12, so that the chamfer of the inner upper edge of the bottom refractory brick 11 can be engaged with the annular protrusion 16 of the upper edge of the refractory component 13, thereby further strengthening its protection of the brick joints and avoiding the accident of iron leakage through the ladle.

[0026] Preferably, the molten iron ladle has a refractory layer 17 on its wall, and a curing layer 18 is provided on the inner side of the refractory layer 17.

[0027] The refractory layer 17 of the ladle wall is constructed of high-alumina refractory bricks, which are baked at 1250℃. Using high-alumina refractory bricks reduces the thickness of the castable refractory layer and, at the same baking temperature, reduces baking time, allowing for fewer furnace cycles and reducing vibration and impact from mechanical cleaning. The curing layer 18 is 30-40 mm thick. A mixed black material-molten iron ladle repair curing material is used to prevent damage to the permanent layer of the molten iron ladle. During offline repair, only the curing layer 18 needs to be removed, reducing ladle repair costs, shortening the repair cycle, increasing the ladle's utilization rate, and simplifying the baking process.

[0028] The working principle of this utility model is as follows:

[0029] The bottom of the molten iron ladle 10 is leveled using spray paint. Refractory material 12 is placed at the center of the bottom of the ladle. Refractory bricks 11 are then laid in a ring around the refractory material 12, with the chamfer 15 on the lower inner edge of the refractory bricks 11 engaging with the annular protrusion 16 on the lower edge of the refractory material 12. Simultaneously, the outer side of the refractory bricks 11 abuts against the wall of the ladle. Refractory component 13 is then placed on top of the refractory material 12, with the chamfer on the upper inner edge of the refractory bricks 11 engaging with the annular protrusion 16 on the upper edge of the refractory component 13. This process is then completed by... The refractory bricks 11 at the bottom of the ladle are tightly connected and form a whole to enhance the erosion resistance. The adjacent refractory bricks 11 at the bottom of the ladle are arranged in an alternating pattern. Specifically, the fan-shaped protrusions 14 on one refractory brick 11 face upwards and the fan-shaped protrusions 14 on the adjacent refractory bricks 11 face downwards. The sides of the fan-shaped protrusions 14 abut against the sides of the adjacent refractory bricks 11 on both sides, and the corresponding fan-shaped surfaces of the adjacent refractory bricks 11 abut against each other, thereby shortening the length of the gap formed to reduce the wear of the bottom of the ladle 10 by the erosion of the hot iron. Finally, the refractory layer 17 and the curing layer 18 are built on the inner wall of the ladle 10 in sequence.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A masonry structure of a hot metal ladle, characterized by, The bottom of the molten iron ladle (10) is annularly laid with a plurality of bottom refractory bricks (11), the horizontal section of the bottom refractory brick (11) is fan-shaped, the bottom of the inner side of the bottom refractory brick (11) is provided with a refractory material (12), and the top is provided with a refractory piece (13); the middle of one fan-shaped surface of the bottom refractory brick (11) is formed with a fan-shaped protrusion (14), so that the section of the bottom refractory brick (11) perpendicular to its radial direction is T-shaped, the thickness of the bottom refractory brick (11) is equal to the thickness of the fan-shaped protrusion (14), and the fan-shaped surface area of the bottom refractory brick (11) is three times the fan-shaped surface area of the fan-shaped protrusion (14).

2. The masonry structure of a ladle according to claim 1, characterized in that, The inner side of the bottom refractory brick (11) is a curved surface, and the shapes of the refractory material (12) and the refractory piece (13) are circular and matched with the curved surface.

3. The masonry structure of a ladle according to claim 1, characterized in that, The thickness of the bottom refractory brick (11) is equal to the sum of the thicknesses of the refractory material (12) and the refractory piece (13).

4. The masonry structure of a ladle according to claim 1, wherein The upper and lower edges of the inner side of the bottom refractory brick (11) are both provided with chamfers (15), and the lower edge of the refractory material (12) and the upper edge of the refractory piece (13) are both correspondingly provided with annular protrusions (16).

5. The masonry structure of a ladle according to claim 1, characterized in that, The wall of the molten iron ladle is provided with a wall refractory layer (17), and the inner side of the wall refractory layer (17) is provided with a curing layer (18).

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