Continuous casting tundish with retaining wall structure

Abstract

The utility model belongs to the technical field of steel continuous casting, and discloses a continuous casting tundish with a retaining wall structure, the retaining wall structure is arranged in a tundish body, the tundish body is divided into a pouring area and a casting flow area by the retaining wall structure, the retaining wall structure comprises a baffle, one end of the baffle is arranged on the inner bottom wall of the tundish body, and the other end of the baffle is arranged on the inner bottom wall of the tundish body. The two opposite sides of the baffle are arranged on the side walls of the tundish body, the other end, away from the inner bottom wall of the tundish body, of the baffle is higher than the molten steel liquid level in the tundish body, a channel is formed between the baffle and the side walls connected with the tundish body, and the channel is located below the molten steel liquid level. According to the continuous casting tundish, the channel is formed between the baffle and the tundish body, molten steel in the pouring area can flow into the casting flow area through the channel, the flow speed of the molten steel is reduced through the arrangement of the channel, and the retention time of the molten steel in the tundish body is prolonged; and molten steel flow strands can be guided to better form surface flow in the tundish body, the retention time of molten steel in the tundish body is prolonged, and the uniformity of the retention time is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting of steel, in particular to a continuous casting tundish with a dam structure. Background Art

[0002] The continuous casting tundish is an important transitional container between the refining ladle and the continuous casting mold. The design of the flow control refractory material system of the continuous casting tundish plays a very important role in continuous casting pouring protection, reducing continuous casting pollution, improving the cleanliness of continuous casting molten steel and temperature control, etc.

[0003] At present, different baffles are usually arranged in the tundish to achieve the uniformity of the flow field, temperature and the floating of inclusions of the molten steel. Usually, the baffles mainly include V-shaped baffles or U-shaped baffles, etc. Exemplarily, as Figure 1 shown, the U-shaped baffle 1' is arranged in the tundish body 2', and the tundish body 2' is divided into two regions. Open holes (not shown in the figure) are arranged on the U-shaped baffle 1'. The molten steel flow enters from one region into another region through the open holes, and the U-shaped baffle 1' is used to block slag. The purpose of slag blocking and controlling the molten steel flow is achieved by setting the size, angle and number of the open holes on the U-shaped baffle 1'.

[0004] However, for the continuous casting machine with a multi-strand tundish, setting the U-shaped baffle makes the residence time distribution of the molten steel not ideal enough, and the shortest residence time and the residence time uniformity of each strand need to be improved.

[0005] Therefore, it is urgent to design a new continuous casting tundish with a dam structure to improve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a continuous casting tundish with a dam structure to solve the problem that the residence time distribution of the molten steel is not ideal enough, and the shortest residence time and the residence time uniformity of each strand need to be improved.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] A continuous casting tundish with a dam structure, wherein the dam structure is arranged in the tundish body, and the dam structure divides the internal space of the tundish body into two regions. Among them, the region on one side of the dam structure is the pouring area, and the region on the other side of the dam structure is the casting strand area. The dam structure includes:

[0009] A baffle plate, one end of the baffle plate is provided on the inner bottom wall of the tundish body, the opposite two sides of the baffle plate are provided on the side wall of the tundish body, the other end of the baffle plate far from the inner bottom wall of the tundish body is higher than the molten steel level in the tundish body, and a channel is formed between the side wall connected to the tundish body. The channel is located below the molten steel level and allows molten steel to flow from the pouring area into the casting area.

[0010] As a preferred solution of the continuous casting tundish with a retaining wall structure, the baffle plate includes:

[0011] A main board, which is provided on the inner bottom wall of the tundish body; and

[0012] Side plates, there are two side plates, the two side plates are respectively provided on the opposite sides of the main board and are arranged on the inner bottom wall of the tundish body. The height of the two side plates in the vertical direction is lower than the height of the main board. The notch formed by the height difference between the side plates and the main board is the channel.

[0013] As a preferred solution of the continuous casting tundish with a retaining wall structure, the main board and the side plates are arranged at an obtuse angle or a 180-degree angle.

[0014] As a preferred solution of the continuous casting tundish with a retaining wall structure, the main board and the two side plates form the U-shaped baffle plate.

[0015] As a preferred solution of the continuous casting tundish with a retaining wall structure, through holes are provided on the main board and / or the side plates.

[0016] As a preferred solution of the continuous casting tundish with a retaining wall structure, the extending direction of the through hole gradually rises or remains horizontal from the end close to the pouring area to the end close to the casting area.

[0017] As a preferred solution of the continuous casting tundish with a retaining wall structure, a turbulator is provided on the inner bottom wall of the tundish body, and the turbulator is located in the pouring area.

[0018] As a preferred solution of the continuous casting tundish with a retaining wall structure, a diversion port is provided on the inner bottom wall of the tundish body, and a stopper rod is selectively provided in the diversion port.

[0019] As a preferred solution of the continuous casting tundish with a retaining wall structure, the tundish body is arranged in a T shape or an L shape or a straight shape.

[0020] The beneficial effects of the present utility model:

[0021] The baffle completely divides the tundish body into a pouring area and a casting stream area. The pouring area receives molten steel from the long nozzle of the ladle. Under the blocking of the baffle, the molten steel flows into the casting stream area through the through-hole after a certain period of time, and finally flows into the continuous casting mold through the gap between the diversion port and the stopper rod via the diversion port.

[0022] In this embodiment, a channel is formed between the baffle and the tundish body. The channel allows the molten steel in the pouring area to flow into the casting stream area. The setting of the channel reduces the flow rate of the molten steel and increases the residence time of the molten steel in the tundish body. In addition, the setting of the channel can also guide the molten steel flow to better form a surface flow in the tundish body, increasing the uniformity of the residence time of the molten steel in the tundish body. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the continuous casting tundish provided in the background art of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the continuous casting tundish provided in the specific embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of the retaining wall structure provided in the specific embodiment of the present utility model.

[0026] Figure 1 In the figure:

[0027] 1', U-shaped baffle; 2', tundish body;

[0028] Figures 2 - 3 In the figure:

[0029] 100, pouring area; 200, casting stream area; 300, channel;

[0030] 1, baffle; 11, main board; 12, side board; 13, through-hole;

[0031] 2, tundish body; 21, turbulator; 22, stopper rod. Specific Embodiment

[0032] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Combined with Figure 2 As shown, this embodiment provides a continuous casting tundish with a retaining wall structure, that is, the continuous casting tundish includes a tundish body 2 and a retaining wall structure.

[0037] Preferably, the tundish body 2 is arranged in a T shape, the top surface of the tundish body 2 is open and the interior is hollow. For the convenience of subsequent description, the two relatively arranged ends of the tundish body 2 are set as the first end and the second end, and the end perpendicular to the first end and the second end is the third end.

[0038] In other embodiments, the tundish body 2 may also be in an L shape, a straight shape, etc. This embodiment does not make specific limitations on this.

[0039] The retaining wall structure is arranged inside the tundish body 2. The retaining wall structure divides the internal space of the tundish body 2 into two areas. Among them, the area on one side of the retaining wall structure is the pouring area 100, and the area on the other side of the retaining wall structure is the casting stream area 200. A through hole 13 is formed on the retaining wall structure. The extending direction of the through hole 13 gradually rises or remains horizontal from the end close to the pouring area 100 towards the end close to the casting stream area 200. That is, the through hole 13 has a certain inclination angle, which can guide the molten steel to flow upward and at the same time reduce the hydrostatic pressure of the molten steel borne by the retaining wall during the starting pouring stage.

[0040] Furthermore, a turbulator 21 is arranged on the inner bottom wall of the tundish body 2, and the turbulator 21 is located in the pouring area 100. The turbulator 21 guides the downward molten steel received in the pouring area 100 into an upward flow form. With the cooperation of the turbulator 21 and the inner wall of the tundish body 2, a relatively uniform flow field and temperature field can be obtained. The addition of the turbulator 21 can significantly increase the residence time of the molten steel in the tundish body 2, which is beneficial to the floating of inclusions in the molten steel. Since the specific structure of the turbulator 21 is the prior art, it will not be further described in this embodiment.

[0041] Even further, a diversion port 22 is formed on the inner bottom wall of the tundish body 2. Preferably, three diversion ports 22 are provided in this embodiment, and a stopper rod 23 is inserted into each diversion port 22.

[0042] In other embodiments, the number of the diversion ports 22 can also be two, four, five, six or even more. The number of the diversion ports 22 is not specifically limited in this embodiment, and the number is set according to the actual situation.

[0043] In summary, referring to Figure 2 , the flowing process of the molten steel in the tundish body 2 is further described in detail:

[0044] First, the pouring area 100 receives the molten steel from the long nozzle of the ladle;

[0045] Then, under the blocking of the baffle 1, the molten steel flows into the casting stream area 200 through the channel 300 and the through hole 13 after a certain time;

[0046] Next, through the gap between the diversion port 22 and the stopper rod 23;

[0047] Finally, it flows into the continuous casting mold from the diversion port 22.

[0048] Combined with Figure 3As shown, the retaining wall structure of this embodiment also includes a baffle 1, one end of the baffle 1 is arranged on the inner bottom wall of the ladle body 2, and the opposite two sides of the baffle 1 are arranged on the side walls of the ladle body 2. The other end of the baffle 1 away from the inner bottom wall of the ladle body 2 is higher than the molten steel level in the ladle body 2, and a channel 300 is formed between the side walls connected to the ladle body 2. The channel 300 is located below the molten steel level and can allow the molten steel to flow from the pouring area 100 into the casting strand area 200.

[0049] It can be understood that the present embodiment forms a channel 300 between the baffle 1 and the tundish body 2. The channel 300 allows the molten steel in the pouring area 100 to flow into the casting zone 200. The provision of the channel 300 reduces the flow rate of the molten steel and increases the residence time of the molten steel in the tundish body 2. In addition, the provision of the channel 300 can also guide the molten steel streams to better form surface flows in the tundish body 2, thereby increasing the uniformity of the residence time of the molten steel in the tundish body 2.

[0050] More specifically, see Figure 3 The baffle 1 includes a main plate 11 and a side plate 12. Two side plates 12 are provided. The two side plates 12 are respectively arranged on opposite sides of the main plate 11. The main plate 11 and the side plates 12 are both arranged on the inner bottom wall of the tundish body 2. The height of the two side plates 12 in the vertical direction is lower than the height of the main plate 11. The gap formed by the height difference between the side plates 12 and the main plate 11 is the channel 300.

[0051] The main board 11 and the side boards 12 are arranged at an angle, and the angle is an obtuse angle, preferably 120 degrees, and in other embodiments it can also be 180 degrees. Thus, the main board 11 and the two side boards 12 form a U-shaped baffle 1. In other embodiments, the baffle 1 can also be V-shaped or "凵"-shaped, etc., and this embodiment does not limit its specific shape.

[0052] In another embodiment, one end of the side plate 12 away from the inner bottom wall of the tundish body 2 can be set as an inclined surface, and a channel 300 can also be formed by the inclined surface, the side plate 12 of the main plate 11 and the inner wall of the tundish body 2.

[0053] In more detail, the through holes 13 of this embodiment are provided on the two side plates 12, and each side plate 12 is provided with two through holes 13, the two through holes 13 are arranged up and down, and the extension direction of the through holes 13 on the side plates 12 is located in the middle area of ​​two adjacent diversion ports 22. In this way, after the molten steel enters the casting strand area 200 from the pouring area 100, the mainstream strand is located in the middle area of ​​the two adjacent diversion ports 22, which increases the residence time of the molten steel in the tundish body 2 and the uniformity of the residence time.

[0054] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A continuous casting tundish with a retaining wall structure, wherein the retaining wall structure is arranged in a tundish body (2), and the retaining wall structure divides the internal space of the tundish body (2) into two areas, wherein: The area located on one side of the retaining wall structure is a pouring area (100), and the area located on the other side of the retaining wall structure is a casting area (200), wherein the retaining wall structure comprises: A baffle (1), one end of the baffle (1) is arranged on the inner bottom wall of the tundish body (2), and the opposite two sides of the baffle (1) are arranged on the side walls of the tundish body (2). The other end of the baffle (1) away from the inner bottom wall of the tundish body (2) is higher than the liquid level of molten steel in the tundish body (2), and a channel (300) is formed between the side walls connected to the tundish body (2). The channel (300) is located below the liquid level of molten steel and allows molten steel to flow from the pouring area (100) into the casting strand area (200).

2. The continuous casting tundish with a retaining wall structure according to claim 1, characterized in that: The baffle (1) comprises: a main board (11), which is arranged on the inner bottom wall of the tundish body (2); and Two side plates (12) are provided. The two side plates (12) are respectively arranged on opposite sides of the main plate (11) and on the inner bottom wall of the tundish body (2). The height of the two side plates (12) in the vertical direction is lower than the height of the main plate (11). The notch formed by the height difference between the side plates (12) and the main plate (11) is the channel (300).

3. The continuous casting tundish with a retaining wall structure according to claim 2, characterized in that: The main board (11) and the side board (12) are arranged at an obtuse angle or an angle of 180 degrees.

4. The continuous casting tundish with a retaining wall structure according to claim 3, characterized in that: The main plate (11) and the two side plates (12) form the U-shaped baffle plate (1).

5. The continuous casting tundish with a retaining wall structure according to claim 2, characterized in that: The main board (11) and / or the side board (12) are provided with through holes (13).

6. The continuous casting tundish with a retaining wall structure according to claim 5, characterized in that: The extension direction of the through hole (13) gradually rises or remains horizontal along an end close to the pouring zone (100) toward an end close to the casting strand zone (200).

7. The continuous casting tundish with a retaining wall structure according to any one of claims 1 to 6, characterized in that: The inner bottom wall of the tundish body (2) is provided with a turbulator (21), and the turbulator (21) is located in the casting area (100).

8. The continuous casting tundish with a retaining wall structure according to any one of claims 1 to 6, characterized in that: The inner bottom wall of the tundish body (2) is provided with a diversion opening, and a stopper rod (22) is selectively arranged in the diversion opening.

9. The continuous casting tundish with a retaining wall structure according to any one of claims 1 to 6, characterized in that: The tundish body (2) is arranged in a T-shape, an L-shape or a straight line shape.

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