Tundish structure facilitating floating of inclusions

Abstract

The tundish structure comprises a tundish body, a tundish cover is installed at the upper end of the tundish body, a stopper rod area is arranged at the right end of the interior of the tundish body, a stopper rod is installed in the stopper rod area, and the top end of the stopper rod penetrates through the tundish cover and is connected to a stopper rod control mechanism. The stopper control mechanism is mounted at the right end of the tundish body, a retaining dam B is arranged on the left side of the stopper at the bottom end in the tundish body, a retaining dam A is arranged on the left side of the retaining dam B, a retaining wall is arranged on the left side in the tundish body, an impact area is formed in the left side of the retaining wall, and a long nozzle of a penetrating structure is formed in the left side of the tundish cover. And a flow stabilizer arranged at the bottom end of the impact area is positioned below the long nozzle. According to the tundish, the structure of the tundish is modified, so that a molten steel flow field in the tundish is more reasonable, inclusions are easier to float upwards to be removed, casting blanks with more excellent quality are manufactured, and the flaw detection qualification rate of steel plates is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting, in particular to a tundish structure which is beneficial for inclusions to float up. Background Art

[0002] In the continuous casting process, the tundish plays a key role in connecting the past and the future. After the molten steel smelted by the upstream process reaches the casting machine, the molten steel flows from the ladle through the long nozzle and then is injected into the tundish. The traditional rectangular tundish is composed of a retaining wall and a dam structure. The area where the long nozzle on one side of the retaining wall injects the molten steel is the impact zone, and the other side of the retaining wall is the stopper zone. Since the density of the liquid slag and the tundish covering agent is lighter than that of the molten steel, the liquid slag and the tundish covering agent float on the surface of the molten steel in the impact zone and the stopper zone. The tundish adopts the internal structure of the retaining wall and the dam, and the combined action of the two can promote the separation and floating of inclusions and molten steel and further improve the cleanliness of the molten steel.

[0003] Baosteel's wide and thick plates still have a large number of quality defects such as non-compliant flaw detection and non-compliant performance every year, a large part of which is caused by excessive inclusions in the molten steel. There are many reasons for the excessive inclusions in the molten steel, among which the unreasonable design of the structure in the tundish and the inability of the inclusions in the molten steel to fully float up are important reasons. The structure design in the tundish must be optimized to make the inclusions in the molten steel float more fully and obtain purer molten steel to further improve the quality of the steel plates. Therefore, the utility model provides a tundish structure that is conducive to the floating of inclusions to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a tundish structure which is conducive to the floating of inclusions, so as to solve the problems in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a tundish structure that is conducive to the floating of inclusions, comprising:

[0006] A tundish body, wherein a tundish cover is installed at the upper end of the tundish body, a stopper rod area is provided at the right end inside the tundish body, and a stopper rod is installed in the stopper rod area, the top end of the stopper rod passes through the tundish cover and is connected to a stopper rod control mechanism, and the stopper rod control mechanism is installed at the right end of the tundish body;

[0007] A dam B is provided at the left side of the stopper rod at the bottom of the interior of the tundish body, and a dam A is provided on the left side of the dam B. A retaining wall is provided on the left side of the interior of the tundish body, and an impact zone is opened at the left side of the retaining wall. A long water inlet with a through structure is provided on the left side of the ladle cover, and a flow stabilizer provided at the bottom of the impact zone is located below the long water inlet.

[0008] Preferably, as a preferred embodiment of the present invention, a groove is provided between the retaining wall and the dam A, and the width of the groove is 300 mm.

[0009] Preferably, as a preferred embodiment of the present invention, the groove is paved with refractory bricks.

[0010] Preferably, as a preferred embodiment of the present invention, the distance between the retaining wall and the long water outlet is 1200 mm.

[0011] Preferably, as a preferred embodiment of the present invention, the top end position of the dam A is 100 mm higher than the bottom end position of the retaining wall.

[0012] Preferably, as a preferred embodiment of the present invention, openings are provided on both sides of the center position of the bottom end of the dam B, and the size of the openings is 120×80 mm.

[0013] Preferably, as a preferred embodiment of the present invention, the flow stabilizer is a square structure, a groove is provided in the middle of the flow stabilizer, and the groove is aligned with the long water outlet.

[0014] Compared with the prior art, the utility model has the following beneficial effects: by modifying the structure of the tundish, the molten steel flow field in the tundish is made more reasonable, and inclusions are easier to float up and be removed, thereby producing a better quality ingot and improving the qualified rate of steel plate flaw detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the tundish of the utility model.

[0016] Figure 2 It is a top view of the utility model retaining dam.

[0017] Figure 3 It is a structural diagram of a small retaining dam of the utility model.

[0018] In the figure: 1. Tundish body; 2. Tundish cover; 3. Retaining wall; 4. Flow stabilizer; 5. Dam A; 6. Dam B; 7. Stopper rod; 8. Stopper rod control mechanism; 9. Long water outlet; 10. Groove; 11. Opening; 12. Impact zone; 13. Stopper rod zone. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 the present invention. In addition, in the description of the present invention, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or a connection through an intermediate medium. It can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The meaning of "multiple" in the present utility model is two or more, and unless otherwise clearly and specifically limited, they all fall within the scope of protection of the present utility model.

[0022] Example: Figure 1-3 , the utility model provides a technical solution: including:

[0023] A tundish body 1), a tundish cover 2) is installed on the upper end of the tundish body 1), a stopper rod area 13) is provided at the right end inside the tundish body 1), and a stopper rod 7) is installed in the stopper rod area 13), the top end of the stopper rod 7) passes through the tundish cover 2) and is connected to a stopper rod control mechanism 8), and the stopper rod control mechanism 8) is installed at the right end of the tundish body 1);

[0024] A dam B6) is provided at the bottom of the interior of the tundish body 1) on the left side of the stopper rod 7), a dam A5) is provided on the left side of the dam B6), a retaining wall 3) is provided on the left side of the retaining wall 3), an impact zone 12) is provided on the left side of the retaining wall 3), a long water inlet 9) with a through structure is provided on the left side of the ladle cover 2), and a flow stabilizer 4) is provided at the bottom end of the impact zone 12) and is located below the long water inlet 9).

[0025] A groove 10) is provided between the retaining wall 3) and the dam A5), and the width of the groove 10) is 300 mm.

[0026] The groove 10) is paved with refractory bricks.

[0027] The distance between the retaining wall 3) and the long shroud 9) is 1200 mm.

[0028] The top end of the retaining dam A5) is 100 mm higher than the bottom end of the retaining wall 3).

[0029] Openings 11) are provided on both sides of the center of the bottom end of the dam B6), and the size of the openings is 120×80 mm.

[0030] The flow stabilizer 4) is a square structure, a groove is provided in the middle of the flow stabilizer 4), and the groove is aligned with the long water outlet 9).

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A tundish structure that facilitates the floating of inclusions, characterized in that: include: A tundish body (1), wherein a tundish cover (2) is installed at the upper end of the tundish body (1), a stopper rod area (13) is provided at the right end inside the tundish body (1), and a stopper rod (7) is installed in the stopper rod area (13), the top end of the stopper rod (7) passes through the tundish cover (2) and is connected to a stopper rod control mechanism (8), and the stopper rod control mechanism (8) is installed at the right end of the tundish body (1); A dam B (6) is provided at the bottom of the interior of the tundish body (1) on the left side of the stopper rod (7), and a dam A (5) is provided on the left side of the dam B (6). A retaining wall (3) is provided on the left side of the interior of the tundish body (1), and an impact zone (12) is provided on the left side of the retaining wall (3). A long water inlet (9) with a through structure is provided on the left side of the tundish cover (2), and a flow stabilizer (4) provided at the bottom end of the impact zone (12) is located below the long water inlet (9).

2. The tundish structure that facilitates the floating of inclusions according to claim 1 is characterized in that: A groove (10) is provided between the retaining wall (3) and the retaining dam A (5), and the width of the groove (10) is 300 mm.

3. The tundish structure that facilitates the floating of inclusions according to claim 2 is characterized in that: The groove (10) is paved with refractory bricks.

4. The tundish structure that facilitates the floating of inclusions according to claim 1 is characterized in that: The distance between the retaining wall (3) and the long water outlet (9) is 1200 mm.

5. The tundish structure that facilitates the floating of inclusions according to claim 1 is characterized in that: The top end of the retaining dam A (5) is 100 mm higher than the bottom end of the retaining wall (3).

6. The tundish structure that facilitates the floating of inclusions according to claim 1 is characterized in that: The dam B (6) is provided with openings (11) on both sides at the center of the bottom end, and the size of the openings is 120×80 mm.

7. The tundish structure that facilitates the floating of inclusions according to claim 1 is characterized in that: The flow stabilizer (4) is a square structure, and a groove is provided in the middle of the flow stabilizer (4), and the groove is aligned with the long water outlet (9).

Images