Magnesium current stabilizer for tundish

Abstract

The utility model relates to the technical field of tundish flow control, in particular to a magnesium flow stabilizer for a tundish, which comprises a hollow magnesium body, the top of the magnesium body is provided with an opening, the inner bottom of the magnesium body is provided with a corundum drainage body coaxial with the magnesium body, and the corundum drainage body is provided with a circular top surface; wherein the inner bottom surface of the magnesian body is an arc-shaped surface which is in smooth transition with the inner wall surface of the magnesian body and the outer wall surface of the corundum drainage body; by means of the smooth arc transition design of the inner bottom face of the magnesium body and the outer wall face of the corundum drainage body, turbulence and local scouring during flowing of molten steel are effectively reduced, the high hardness characteristic of the corundum drainage body is combined, erosion to the magnesium body is remarkably reduced, and the service life is prolonged. The inner wall face of the magnesium body is designed to be a conical face, the flow speed of molten steel is guided to be evenly distributed, and local scouring aggravation caused by sudden change of the flow speed is avoided.

Description

A magnesium current stabilizer for tundish Technical Field

[0001] This utility model relates to the field of tundish flow control technology, and in particular to a magnesium flow stabilizer for tundishes. Background Technology

[0002] As an important component of the tundish that receives molten steel, the flow stabilizer can not only effectively reduce the scouring and erosion of the refractory material in the impact zone of the tundish by the molten steel, but also effectively improve the flow state of the molten steel, reduce the temperature difference in the area near the outlet, prolong the residence time of the molten steel in the tundish, promote the full floating and removal of non-metallic inclusions in the steel, and effectively improve the quality of the molten steel.

[0003] Although magnesia refractory materials do not contaminate molten steel, making them a reasonable choice for flow stabilizers, they are not resistant to molten steel erosion, and the flow stabilizers currently used are not effective at preventing impact on molten steel.

[0004] To address this, we designed a magnesium current stabilizer for tundishes. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this utility model discloses a magnesium current stabilizer for tundishes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A magnesium current stabilizer for tundishes, comprising a hollow magnesium body with an opening at the top and a corundum guide fluid coaxial with it at the bottom of the magnesium body, the corundum guide fluid having a dome surface.

[0008] The inner bottom surface of the magnesium body is an arc-shaped surface that smoothly transitions to its inner wall surface and the outer wall surface of the corundum fluid.

[0009] Furthermore, the inner wall surface of the magnesium body is a conical surface.

[0010] Furthermore, the upper part of the inner wall surface of the magnesium body has an inwardly facing annular inner cover plate, and the root of the annular inner cover plate smoothly transitions to the inner wall surface of the magnesium body. The diameter of the central hole of the annular inner cover plate is larger than the opening diameter of the magnesium body.

[0011] Furthermore, the lower surface of the annular inner cover plate is an arc-shaped surface that bulges upward in the middle.

[0012] Furthermore, the root of the annular inner cover plate is provided with multiple through holes evenly spaced along its circumference.

[0013] Furthermore, the inner section of the top plate of the magnesium body is a downward-facing conical section, and the conical section has a structure that is larger at the top and smaller at the bottom.

[0014] Furthermore, the corundum-based fluid guide has a conical structure.

[0015] Furthermore, an assembly hole is provided at the bottom of the magnesium body, and a neck is provided in the lower section of the corundum fluid guide. The neck is matched and inserted into the assembly hole and connected by magnesium fire putty bonding material.

[0016] Furthermore, the constricted neck of the corundum fluid is an inverted conical structure.

[0017] Furthermore, the bottom surface of the magnesium body has a recessed portion.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The smooth arc transition between the inner bottom surface of the magnesia body and the outer wall of the corundum guide fluid effectively reduces turbulence and local erosion during molten steel flow. Combined with the high hardness of the corundum guide fluid, it significantly reduces corrosion of the magnesia body and extends its service life. Specifically, the inner wall of the magnesia body adopts a conical design to guide the molten steel flow velocity to a uniform distribution, avoiding aggravated local erosion caused by sudden changes in flow velocity.

[0020] 2. The dome-shaped surface of the corundum guide fluid and the arc-shaped inner bottom surface of the magnesia body cooperate to form a laminar flow guiding structure, reducing temperature differences and non-metallic inclusion residues during molten steel flow, and improving the cleanliness of the molten steel. Among them, the lower surface of the annular inner cover plate is an arc-shaped surface that rises upward in the middle, which can disperse the impact force of molten steel and, together with the through holes, balance the internal pressure, further stabilizing the flow state of molten steel.

[0021] 3. The corundum fluid guide is fixed by inserting it into the assembly hole of the magnesia body through the constricted neck. Combined with the inverted conical structure and magnesia molten metal bonding material, it ensures the sealing and thermal shock resistance of the connection parts under high temperature environment and avoids the risk of falling off. The recessed part set on the bottom surface of the magnesia body reduces the overall weight while ensuring structural strength, and adapts to the installation requirements of different intermediate tundishes.

[0022] 3. Overall, through multi-dimensional structural optimization, the problems of poor erosion resistance and insufficient flow stabilization effect of traditional magnesium flow stabilizers have been solved, significantly improving the flow control efficiency of the tundish and the quality of molten steel. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the structure of this utility model;

[0024] Figure 2 is a top view of this utility model;

[0025] Figure 3 is a cross-sectional view AA of Figure 2;

[0026] Figure 4 shows another structure of this utility model.

[0027] In the figure: 1. Magnesium body; 11. Opening; 12. Inner bottom surface; 13. Inner wall surface; 14. Conical section; 15. Assembly hole; 16. Recess; 2. Corundum fluid guide; 21. Dome surface; 22. Neck; 3. Annular inner cover plate; 31. Lower plate surface; 32. Through hole. Detailed Implementation

[0028] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0029] Example 1, as shown in Figures 1 to 3, provides a magnesium flow stabilizer for tundishes, comprising a magnesium body 1 and a corundum guide fluid 2. The magnesium body 1 is an inverted conical structure with a hollow interior and an opening 11 at the top for receiving molten steel. The inner bottom surface 12 of the magnesium body 1 is designed as an arc surface, smoothly transitioning with the inner wall surface 13 and the outer wall surface of the corundum guide fluid 2 to reduce turbulence and scouring during molten steel flow.

[0030] As required, the inner section of the top plate of the magnesium body 1 is a downward conical section 14, and the conical section 14 has a structure that is larger at the top and smaller at the bottom, so that the opening 11 is an inverted conical structure.

[0031] As needed, the inner bottom surface 12 of the magnesium body 1 should be made tangent to the inner wall surface 13 and the outer wall surface of the corundum fluid 2 as much as possible.

[0032] Preferably, the thickness of the bottom of the magnesium body 1 is 1.5 to 2.5 times the thickness of the sidewall.

[0033] The corundum-based guide fluid 2 is coaxially disposed at the inner bottom of the magnesium body 1, and its top is a dome surface 21, which can guide the molten steel to flow smoothly downward.

[0034] The corundum-based guide fluid 2 is inserted and fixed into the mounting hole 15 at the bottom of the magnesia body 1 via the necking 22, and the connection is sealed with magnesia-fired mortar to ensure structural stability. The bottom surface of the magnesia body 1 is also provided with a recess 16 to reduce the overall weight and improve installation adaptability.

[0035] As required, the mating surfaces of the neck 22 and the mounting hole 15 also adopt an inverted conical design to improve the connection strength. The inclination angle of the conical section of the inner wall surface 13 of the magnesium body 1 is 30° to adapt to the installation requirements of different intermediate tundishes.

[0036] Furthermore, as shown in Figure 3, there is an oriented stepped surface between the neck 22 and the corundum fluid body 2.

[0037] The inner wall surface 13 of the magnesium body 1 is a conical surface that gradually narrows from top to bottom, forming a conical section that is larger at the top and smaller at the bottom, further optimizing the distribution of molten steel flow velocity.

[0038] In addition, the upper section of the inner wall surface 13 is provided with an annular inner cover plate 3, the root of which smoothly transitions with the inner wall surface 13. As needed, the root of the annular inner cover plate 3 is made as tangent to the inner wall surface 13 as possible.

[0039] The diameter of the central hole in the annular inner cover plate 3 is larger than the diameter of the opening 11. The lower surface 31 of the annular inner cover plate 3 is an arc-shaped surface that bulges upward in the middle, which can disperse the impact force of molten steel. Multiple through holes 32 are evenly spaced along the circumference of the annular inner cover plate 3 to balance the internal pressure.

[0040] Preferably, the through hole 32 is located at the root of the annular inner cover plate 3.

[0041] Example 2, as shown in Figure 4, differs from Example 1 primarily in the structural design of the corundum-based fluid guide 2. The corundum-based fluid guide 2 is integrally formed on the magnesium body 1. Its dome-shaped top surface 21 (top dome, bottom inverted cone) is inserted into the top of the corundum-based fluid guide 2 and connected via magnesium refractory bonding material. This further simplifies the manufacturing process and reduces costs.

[0042] At this time, the corundum-based fluid 2 can be made of magnesium, while only the dome surface 21 is made of corundum.

[0043] It should be noted that: cone-shaped, cone-shaped segments, and cone-shaped structures are of the type with a smaller top and a larger bottom; inverted cone-shaped, cone-shaped segments, and cone-shaped structures are of the type with a larger top and a smaller bottom.

[0044] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A magnesium current stabilizer for tundishes, comprising a hollow magnesium body (1) having an opening (11) at the top, characterized in that: The magnesium body (1) has a coaxial corundum fluid guide (2) at its inner bottom, and the corundum fluid guide (2) has a dome surface (21); wherein, the inner bottom surface (12) of the magnesium body (1) is an arc-shaped surface that smoothly transitions with its inner wall surface (13) and the outer wall surface of the corundum fluid guide (2).

2. The magnesium current stabilizer for tundishes according to claim 1, characterized in that: The inner wall surface (13) of the magnesium body (1) is a conical surface.

3. A magnesium current stabilizer for tundishes according to claim 1, characterized in that: The upper section of the inner wall surface (13) of the magnesium body (1) has an inwardly facing annular inner cover plate (3), and the root of the annular inner cover plate (3) smoothly transitions with the inner wall surface (13) of the magnesium body (1). The diameter of the central hole of the annular inner cover plate (3) is larger than the diameter of the opening (11) of the magnesium body (1).

4. A magnesium current stabilizer for tundishes according to claim 3, characterized in that: The lower surface (31) of the annular inner cover plate (3) is an arc-shaped surface that bulges upward in the middle.

5. A magnesium current stabilizer for an tundish according to claim 3 or 4, characterized in that: The annular inner cover plate (3) is also provided with multiple through holes (32) at even intervals along its circumference at its root.

6. A magnesium current stabilizer for tundishes according to claim 1, characterized in that: The inner section of the top plate of the magnesium body (1) is a downward conical section (14), and the conical section (14) has a structure that is larger at the top and smaller at the bottom.

7. A magnesium current stabilizer for tundishes according to claim 1, characterized in that: The corundum-based fluid (2) has a conical structure.

8. A magnesium current stabilizer for tundishes according to claim 1, characterized in that: The magnesium body (1) has an assembly hole (15) at its bottom. The corundum fluid guide (2) has a neck (22) at its lower section. The neck (22) is fitted into the assembly hole (15) and connected by magnesium fire putty bonding material.

9. A magnesium current stabilizer for tundishes according to claim 8, characterized in that: The constricted neck (22) of the corundum fluid (2) is an inverted conical structure.

10. A magnesium current stabilizer for tundishes according to claim 8, characterized in that: The bottom surface of the magnesium body (1) has a recess (16).

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