Argon blowing tundish for continuous casting of steel billets

Abstract

The utility model relates to the technical field of steel casting, in particular to an argon blowing tundish for continuous casting of steel billets, which is characterized in that a first argon blowing pipe, a second argon blowing pipe and an argon guiding mechanism are further connected onto a cover plate, and the first argon blowing pipe and the second argon blowing pipe are respectively arranged on two sides of a blanking pipe. The argon gas guide mechanism can guide out argon gas filled from the first argon blowing pipe and the second argon blowing pipe; the bottom of the tank body is connected with a first connecting pipe and a second connecting pipe, the tank body is connected with the two crystallizers through the first connecting pipe and the second connecting pipe, the first connecting pipe and the second connecting pipe are arranged on the two sides of the tank body respectively, and fed argon can be rapidly guided out through an arranged argon guiding mechanism. And oxygen in the tundish can be rapidly exhausted through argon, and the exhaust speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of steel casting, in particular to an argon blowing tundish for continuous casting of steel billets. Background Art

[0002] Continuous casting, that is, continuous steel casting, is a molten steel forming technology that continuously adds refined molten steel into a crystallizer and pulls the molten steel out from the bottom of the crystallizer after solidification. Usually, the tundish continuous casting metallurgical method is used. The overall process flow is that the ladle is first transported to the rotary tower through a transport device, and then the molten steel in the ladle is transported to the crystallizer through a unloading mechanism to solidify and form a shell. The ingot with liquid core is then cooled in the secondary cooling zone to make the shell grow evenly and stably. Finally, the shell is completely produced and transported to the steel rolling process for processing via a conveying mechanism.

[0003] The tundish is the last container for holding liquid steel in the continuous casting process. A retaining wall is usually set inside it. On the one hand, it can block the slag from the ladle and the slag on the surface of the molten steel in the tundish, and on the other hand, it can adjust the liquid flow rate in the tundish.

[0004] Common retaining wall settings are divided into single-sided retaining wall tundish and double-sided retaining wall tundish. In the single-sided retaining wall tundish, molten steel is input from one side of the tundish and then output from the other side, while in the double-sided retaining wall tundish, molten steel input from the middle is output from both sides through baffles on both sides. In this form, the argon gas introduced from the argon blowing pipe is not easy to quickly expel oxygen, and the argon blowing efficiency is slow. Utility Model Content

[0005] In view of the above problems, the utility model provides an argon blowing tundish for continuous casting of steel billets.

[0006] The adopted technical scheme is an argon blowing tundish for continuous casting of steel billets, comprising a tank body, a cover plate is arranged on the top of the tank body, the lower part of the tank body is connected to the crystallizer, the top of the cover plate is connected to one end of a feed pipe, and the feed pipe is connected to a ladle, wherein a first argon blowing pipe, a second argon blowing pipe and an argon gas guide mechanism are also connected to the cover plate, and the first argon blowing pipe and the second argon blowing pipe are respectively arranged on both sides of the feed pipe, and the argon gas guide mechanism can guide out the argon gas filled from the first argon blowing pipe and the second argon blowing pipe;

[0007] The bottom of the tank body is connected with a first connecting pipe and a second connecting pipe, and is respectively connected to two crystallizers through the first connecting pipe and the second connecting pipe. The first connecting pipe and the second connecting pipe are respectively arranged on both sides of the tank body.

[0008] Furthermore, the cover plate is connected to a first retaining wall and a second retaining wall, and the first retaining wall and the second retaining wall can be inserted into the tank body and there is a gap between the first retaining wall and the second retaining wall and the bottom of the tank body;

[0009] A third retaining wall and a fourth retaining wall are arranged in the tank body, and both the third retaining wall and the fourth retaining wall are connected to the bottom of the tank body, and the vertical projections of the third retaining wall and the fourth retaining wall are located within the vertical projections of the first retaining wall and the second retaining wall.

[0010] Optionally, the first retaining wall is located between the first argon blowing pipe inserted into the cover plate and the first connecting pipe;

[0011] The second retaining wall is located between the second argon blowing pipe inserting cover plate and the second connecting pipe;

[0012] The third retaining wall is located between the first argon blowing pipe inserting cover plate and the first retaining wall;

[0013] The fourth retaining wall is located between the second retaining wall and the second argon blowing pipe inserted into the cover plate.

[0014] Optionally, one end of the first argon blowing pipe located in the tank body passes through the first retaining wall and the third retaining wall, and one end of the second argon blowing pipe located in the tank body passes through the second retaining wall and the fourth retaining wall.

[0015] Furthermore, the argon gas guide mechanism includes a first gas guide mechanism, a second gas guide mechanism, a third gas guide mechanism and a fourth gas guide mechanism, and the first gas guide mechanism and the second gas guide mechanism are located on one side of the cover plate, and the third gas guide mechanism and the fourth gas guide mechanism are located on the other side of the cover plate.

[0016] Optionally, the first air guide mechanism includes a first air guide cavity and a first air guide pipe, and one end of the first air guide pipe is connected to the first air guide cavity, and the other end of the first air guide pipe passes through the cover plate;

[0017] The second air guide mechanism includes a second air guide cavity and a second air guide pipe, wherein one end of the second air guide pipe is connected to the second air guide cavity, and the other end of the second air guide pipe passes through the cover plate;

[0018] The third air guide mechanism includes a third air guide cavity and a third air guide pipe, and one end of the third air guide pipe is connected to the third air guide cavity, and the other end of the third air guide pipe passes through the cover plate;

[0019] The fourth air guide mechanism includes a fourth air guide cavity and a fourth air guide pipe, one end of the fourth air guide pipe is connected to the fourth air guide cavity, and the other end of the fourth air guide pipe passes through the cover plate.

[0020] Optionally, the first air guiding cavity and the second air guiding cavity are respectively arranged on both sides of the first retaining wall, and the third air guiding cavity and the fourth air guiding cavity are respectively arranged on both sides of the second retaining wall.

[0021] The beneficial effects of the utility model include at least one of the following:

[0022] 1. The argon gas guide mechanism can quickly guide the introduced argon gas out, so that the argon gas can quickly discharge the oxygen in the tundish and increase the exhaust speed.

[0023] 2. By setting up a retaining wall with a special structure, the tank body can be divided into two parts, and the argon blowing pipe can be fixed to avoid vibration during argon blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the connection structure between the intermediate tank and the rotary tower;

[0025] Figure 2 is a schematic diagram of the cover plate structure;

[0026] Figure 3 It is a schematic diagram of the tank structure;

[0027] Figure 4 This is a schematic diagram of the internal structure of the intermediate tank;

[0028] The figure marks include: 8 for the feeding pipe, 15 for the tank body, 16 for the cover plate, 17 for the first argon blowing pipe, 18 for the second argon blowing pipe, 19 for the first air guide pipe, 20 for the second air guide pipe, 21 for the third air guide pipe, 22 for the fourth air guide pipe, 23 for the first air guide cavity, 24 for the second air guide cavity, 25 for the third air guide cavity, 26 for the fourth air guide cavity, 27 for the first retaining wall, 28 for the second retaining wall, 29 for the first connecting pipe, 30 for the second connecting pipe, 31 for the third retaining wall, and 32 for the fourth retaining wall. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0031] like Figures 1 to 4As shown, an argon blowing tundish for continuous casting of steel billets comprises a tank body 15, a cover plate 16 is arranged on the top of the tank body 15, the lower part of the tank body 15 is connected to the crystallizer, the top of the cover plate 16 is connected to one end of the feed pipe 8, and the feed pipe 8 is connected to the ladle, wherein the cover plate 16 is also connected to a first argon blowing pipe 17, a second argon blowing pipe 18 and an argon gas guide mechanism, and the first argon blowing pipe 17 and the second argon blowing pipe 18 are respectively arranged on both sides of the feed pipe 8, and the argon gas guide mechanism can guide out the argon gas filled from the first argon blowing pipe 17 and the second argon blowing pipe 18;

[0032] The bottom of the tank body 15 is connected to a first connecting pipe 29 and a second connecting pipe 30 , and is connected to two crystallizers through the first connecting pipe 29 and the second connecting pipe 30 , respectively. The first connecting pipe 29 and the second connecting pipe 30 are respectively arranged on both sides of the tank body 15 .

[0033] The purpose of such design is to enable the introduced argon gas to be quickly discharged through the set argon gas guide mechanism, so that the argon gas can quickly discharge the oxygen in the tundish, thereby improving the exhaust speed, and solving the problem that the existing double-sided retaining wall tundish outputs the molten steel input from the middle from both sides through the baffles on both sides. In this form, the argon gas introduced from the argon blowing pipe is not easy to quickly discharge the oxygen, and the argon blowing efficiency is slow.

[0034] In this embodiment, the cover plate 16 is connected with a first retaining wall 27 and a second retaining wall 28, and the first retaining wall 27 and the second retaining wall 28 can be inserted into the tank body 15, and there is a gap between the first retaining wall 27 and the second retaining wall 28 and the bottom of the tank body 15;

[0035] The third retaining wall 31 and the fourth retaining wall 32 are arranged in the tank body 15 , and the third retaining wall 31 and the fourth retaining wall 32 are connected to the bottom of the tank body 15 , and the vertical projections of the third retaining wall 31 and the fourth retaining wall 32 are located within the vertical projections of the first retaining wall 27 and the second retaining wall 28 .

[0036] The purpose of this design is to divide the tank into two parts by setting up a retaining wall with a special structure, and to fix the argon blowing pipe to avoid vibration during argon blowing.

[0037] The first retaining wall 27 is located between the first argon blowing pipe 17 inserted into the cover plate 16 and the first connecting pipe 29;

[0038] The second retaining wall 28 is located between the second argon blowing pipe 18 inserted into the cover plate 16 and the second connecting pipe 30;

[0039] The third retaining wall 31 is located between the first argon blowing tube 17 inserted into the cover plate 16 and the first retaining wall 27;

[0040] The fourth retaining wall 32 is located between the second argon blowing pipe 18 inserted into the cover plate 16 and the second retaining wall 28 , the end of the first argon blowing pipe 17 located in the tank body 15 passes through the first retaining wall 27 and the third retaining wall 31 , and the end of the second argon blowing pipe 18 located in the tank body 15 passes through the second retaining wall 28 and the fourth retaining wall 32 .

[0041] The purpose of such design is to divide the interior of the tank body into a plurality of interconnected cavities by means of the first baffle wall, the second baffle wall, the third baffle wall and the fourth baffle wall. After the molten steel enters the tank body, it first flows over the third baffle wall and the fourth baffle wall, and then enters the gap between the third baffle wall and the first baffle wall, and the gap between the fourth baffle wall and the second baffle wall, and is finally discharged from the first connecting pipe and the second connecting pipe respectively. At the same time, the argon gas introduced by the argon blowing pipe discharges the air in the tank body from the argon gas guide mechanism on the cover body.

[0042] In this embodiment, the argon gas guide mechanism includes a first gas guide mechanism, a second gas guide mechanism, a third gas guide mechanism and a fourth gas guide mechanism, and the first gas guide mechanism and the second gas guide mechanism are located on one side of the cover plate 16, and the third gas guide mechanism and the fourth gas guide mechanism are located on the other side of the cover plate 16, and the first gas guide mechanism includes a first gas guide cavity 23 and a first gas guide tube 19, and one end of the first gas guide tube 19 is connected to the first gas guide cavity 23, and the other end of the first gas guide tube 19 passes through the cover plate 16;

[0043] The second air guide mechanism includes a second air guide cavity 24 and a second air guide pipe 20, wherein one end of the second air guide pipe 20 is connected to the second air guide cavity 24, and the other end of the second air guide pipe 20 passes through the cover plate 16;

[0044] The third air guide mechanism includes a third air guide cavity 25 and a third air guide pipe 21, and one end of the third air guide pipe 21 is connected to the third air guide cavity 25, and the other end of the third air guide pipe 21 passes through the cover plate 16;

[0045] The fourth air guide mechanism includes a fourth air guide cavity 26 and a fourth air guide pipe 22 , and one end of the fourth air guide pipe 22 is connected to the fourth air guide cavity 26 , and the other end of the fourth air guide pipe 22 passes through the cover plate 16 .

[0046] The first air guiding cavity 23 and the second air guiding cavity 24 are respectively disposed on both sides of the first retaining wall 27 , and the third air guiding cavity 25 and the fourth air guiding cavity 26 are respectively disposed on both sides of the second retaining wall 28 .

[0047] The purpose of such design is that the argon gas between the third baffle wall and the fourth baffle wall is discharged from the first air guide cavity and the third air guide cavity. At the same time, due to the structure of the upper and lower baffle walls, a part of the argon gas and the original air in the tank body can also enter the gap between the first baffle wall and the third baffle wall, and be discharged between the second baffle wall and the fourth baffle wall, thereby reducing the exhaust pressure. At the same time, since the first argon blowing tube and the second argon blowing tube extending into the tank body are fully arranged and air outlet holes are arranged on the tube body, a part of the argon gas enters the second air guide cavity and the fourth air guide cavity for discharge.

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An argon blowing tundish for continuous casting of steel billets, comprising a tank body (15), a cover plate (16) being arranged on the top of the tank body (15), the lower part of the tank body (15) being connected to a crystallizer, the top of the cover plate (16) being connected to one end of a feed pipe (8), and the feed pipe (8) being connected to a ladle, characterized in that: The cover plate (16) is also connected to a first argon blowing pipe (17), a second argon blowing pipe (18) and an argon gas guiding mechanism, and the first argon blowing pipe (17) and the second argon blowing pipe (18) are respectively arranged on both sides of the feed pipe (8), and the argon gas guiding mechanism can guide the argon gas filled from the first argon blowing pipe (17) and the second argon blowing pipe (18); The bottom of the tank body (15) is connected to a first connecting pipe (29) and a second connecting pipe (30), and is respectively connected to two crystallizers via the first connecting pipe (29) and the second connecting pipe (30). The first connecting pipe (29) and the second connecting pipe (30) are respectively arranged on both sides of the tank body (15).

2. The argon blowing tundish for continuous casting of steel billets according to claim 1, characterized in that: The cover plate (16) is connected to a first retaining wall (27) and a second retaining wall (28), and the first retaining wall (27) and the second retaining wall (28) can be inserted into the tank body (15) and have a gap with the bottom of the tank body (15); A third retaining wall (31) and a fourth retaining wall (32) are arranged in the tank body (15), and the third retaining wall (31) and the fourth retaining wall (32) are both connected to the bottom of the tank body (15), and the vertical projections of the third retaining wall (31) and the fourth retaining wall (32) are located within the vertical projections of the first retaining wall (27) and the second retaining wall (28).

3. The argon blowing tundish for continuous casting of steel billets according to claim 2, characterized in that: The first retaining wall (27) is located between the first argon blowing tube (17) inserted into the cover plate (16) and the first connecting tube (29); The second retaining wall (28) is located between the second argon blowing pipe (18) inserted into the cover plate (16) and the second connecting pipe (30); The third retaining wall (31) is located between the first retaining wall (27) and the location where the first argon blowing tube (17) is inserted into the cover plate (16); The fourth retaining wall (32) is located between the second retaining wall (28) and the location where the second argon blowing tube (18) is inserted into the cover plate (16).

4. The argon blowing tundish for continuous casting of steel billets according to claim 3, characterized in that: One end of the first argon blowing pipe (17) located inside the tank body (15) passes through the first retaining wall (27) and the third retaining wall (31), and one end of the second argon blowing pipe (18) located inside the tank body (15) passes through the second retaining wall (28) and the fourth retaining wall (32).

5. The argon blowing tundish for continuous casting of steel billets according to claim 4, characterized in that: The argon gas guide mechanism comprises a first gas guide mechanism, a second gas guide mechanism, a third gas guide mechanism and a fourth gas guide mechanism, wherein the first gas guide mechanism and the second gas guide mechanism are located on one side of the cover plate (16), and the third gas guide mechanism and the fourth gas guide mechanism are located on the other side of the cover plate (16).

6. The argon blowing tundish for continuous casting of steel billets according to claim 5, characterized in that: The first air guide mechanism comprises a first air guide cavity (23) and a first air guide pipe (19), wherein one end of the first air guide pipe (19) is connected to the first air guide cavity (23), and the other end of the first air guide pipe (19) passes through the cover plate (16); The second air guide mechanism comprises a second air guide cavity (24) and a second air guide pipe (20), wherein one end of the second air guide pipe (20) is connected to the second air guide cavity (24), and the other end of the second air guide pipe (20) passes through the cover plate (16); The third air guide mechanism comprises a third air guide cavity (25) and a third air guide pipe (21), wherein one end of the third air guide pipe (21) is connected to the third air guide cavity (25), and the other end of the third air guide pipe (21) passes through the cover plate (16); The fourth air guide mechanism comprises a fourth air guide cavity (26) and a fourth air guide pipe (22), wherein one end of the fourth air guide pipe (22) is connected to the fourth air guide cavity (26), and the other end of the fourth air guide pipe (22) passes through the cover plate (16).

7. The argon blowing tundish for continuous casting of steel billets according to claim 6, characterized in that: The first air guiding cavity (23) and the second air guiding cavity (24) are respectively arranged on both sides of the first retaining wall (27), and the third air guiding cavity (25) and the fourth air guiding cavity (26) are respectively arranged on both sides of the second retaining wall (28).

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