Intermediate tank for continuous casting

Abstract

The utility model relates to the technical field of steel casting, in particular to a continuous casting tundish which comprises a tundish body, a cover plate is arranged on the top of the tundish body, the lower portion of the tundish body is connected with a crystallizer through a connecting pipe, the top of the cover plate is communicated with one end of a discharging pipe, the discharging pipe is communicated with a steel ladle, and a retaining wall is arranged on the cover plate. A retaining wall is arranged in the tank body, the retaining wall can be inserted into the tank body and divides an inner cavity of the tank body into a feeding cavity and a discharging cavity, an argon blowing mechanism is arranged in the discharging cavity, a liquid gathering section is arranged at the bottom of the discharging cavity, the connecting pipe is communicated with the liquid gathering section, and the whole intermediate tank is divided into two independent cavities through the arranged retaining wall. And meanwhile, the liquid gathering section is arranged in a matched manner, so that the molten steel discharged from the blanking cavity can be limited in the area before being cooled, namely, a buffer area is added for discharging, and the dripping phenomenon is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel casting, in particular to a tundish for continuous casting. 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] However, a single retaining wall with a flat-bottomed intermediate tank and an argon blowing mechanism structure is prone to slag rolling when discharging molten steel, and the raw molten steel is prone to dripping when discharging from the bottom of the intermediate tank. Utility Model Content

[0005] In view of the above problems, the utility model provides a tundish for continuous casting.

[0006] The adopted technical solution is a continuous casting intermediate tank, comprising a tank body, a cover plate is provided on the top of the tank body, the lower part of the tank body is connected to the crystallizer through a connecting pipe, the top of the cover plate is connected to one end of a discharge pipe, and the discharge pipe is connected to a ladle, wherein a retaining wall is provided on the cover plate, and the retaining wall can be inserted into the tank body and divide the internal cavity of the tank body into a feeding cavity and a discharge cavity, an argon blowing mechanism is provided in the discharge cavity, and a liquid gathering section is provided at the bottom of the discharge cavity, and the connecting pipe is connected to the liquid gathering section.

[0007] Furthermore, the bottom of the retaining wall contacts the bottom of the tank body, and a perforation is provided on the upper portion of the retaining wall, and the feed cavity and the discharge cavity are connected through the perforation.

[0008] Optionally, the feed pipe is connected to the feed chamber.

[0009] Optionally, a protrusion is provided at one end of the cover plate, and an air guide pipe is buried in the protrusion, the air guide pipe is connected to the top of the feeding chamber, and the air guide pipe can be connected to an external air pump.

[0010] Furthermore, the protrusion is located at an end of the cover plate away from the discharge pipe.

[0011] Optionally, the argon blowing mechanism includes an argon blowing tube, which is laterally inserted into the feeding cavity from a baking hole on one side of the tank body, and a baffle for shielding the baking hole is provided on the argon blowing tube.

[0012] The beneficial effects of the present utility model include at least one of the following:

[0013] 1. The entire intermediate tank is divided into two independent chambers by setting a retaining wall. At the same time, the liquid gathering section is set so that the molten steel discharged from the discharge chamber can be confined in this area before cooling, that is, a buffer zone is added for discharging, which greatly reduces the occurrence of dripping.

[0014] 2. By providing a protrusion on the cover plate and burying an air guide pipe on the protrusion, the oxygen in the intermediate tank can be quickly discharged when the argon gas is blown in, so as to achieve rapid replacement of oxygen and improve the argon blowing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connection structure between the intermediate tank and the rotary tower;

[0016] Figure 2 is a schematic diagram of the cover plate structure;

[0017] Figure 3 It is a schematic diagram of the tank structure;

[0018] Figure 4 This is a schematic diagram of the internal structure of the intermediate tank;

[0019] The accompanying drawings are numerals: 8 is a feed pipe, 15 is a tank body, 16 is a cover plate, 17 is a connecting pipe, 18 is a retaining wall, 19 is a perforation, 20 is a feed cavity, 21 is a feed cavity, 22 is an argon blowing pipe, 23 is an air guide pipe, and 24 is a liquid gathering section. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figures 1 to 4 As shown, an intermediate tank for continuous casting includes a tank body 15, a cover plate 16 is provided on the top of the tank body 15, the lower part of the tank body 15 is connected to the crystallizer through a connecting pipe 17, the top of the cover plate 16 is connected to one end of a discharge pipe 8, and the discharge pipe 8 is connected to a ladle, wherein a retaining wall 18 is provided on the cover plate 16, and the retaining wall 18 can be inserted into the tank body 15, and divides the internal cavity of the tank body 15 into a feeding cavity 20 and a discharge cavity 21, an argon blowing mechanism is provided in the discharge cavity 21, and a liquid gathering section 24 is provided at the bottom of the discharge cavity 21, and the connecting pipe 17 is connected to the liquid gathering section 24.

[0023] The purpose of such a design is to divide the entire intermediate tank into two independent chambers by means of the setting of the retaining wall, and at the same time, the setting of the liquid gathering section enables the molten steel discharged from the discharge chamber to be confined within the area before cooling, that is, a buffer zone is added for discharging, which greatly reduces the occurrence of dripping, and solves the problem of slag rolling when discharging molten steel in the existing intermediate tank with a single retaining wall, a flat-bottomed intermediate tank and an argon blowing mechanism structure, and the problem that the raw material molten steel is prone to dripping when discharging at the bottom of the intermediate tank.

[0024] In this embodiment, the bottom of the retaining wall 18 contacts the bottom of the tank body 15 , a perforation 19 is provided on the upper portion of the retaining wall 18 , and the feed chamber 20 and the discharge chamber 21 are connected through the perforation 19 , and the discharge pipe 8 is connected to the feed chamber 20 .

[0025] The purpose of this design is to divide the internal cavity of the tank into two parts by setting up a retaining wall, wherein the feed cavity is used to stabilize the flow rate of molten steel entering the intermediate tank from the discharge pipe. As the molten steel is continuously injected, the feed cavity is gradually filled, and the original air in the feed cavity is squeezed into the discharge cavity through the perforations, and at the same time, excess molten steel also enters the discharge cavity through the perforations.

[0026] It should be pointed out that in this embodiment, the retaining wall is arranged on the cover plate. When the cover plate and the tank body are installed, the retaining wall can contact the bottom of the internal cavity of the tank body. At the same time, there are also small gaps, and part of the molten steel can also enter the discharge cavity through the gaps at the contact point.

[0027] At the same time, a protrusion is provided at one end of the cover plate 16, and an air guide pipe 23 is buried in the protrusion, and the air guide pipe 23 is connected to the top of the feeding chamber 21, and the air guide pipe 23 can be connected to an external air pump. The protrusion is located at the end of the cover plate 16 away from the feeding pipe 8, and the argon blowing mechanism includes an argon blowing pipe 22, which is laterally inserted into the feeding chamber 21 from the baking hole on one side of the tank body 15, and a baffle for shielding the baking hole is provided on the argon blowing pipe 22.

[0028] The purpose of this design is to provide a protrusion on the cover plate and bury an air duct on the protrusion, so that the oxygen in the intermediate tank can be quickly discharged when argon is blown in, thereby quickly replacing oxygen and improving the argon blowing efficiency.

[0029] In actual use, an air pump may be installed at the other end of the air guide pipe 23 to quickly discharge the gas in the intermediate tank.

[0030] During the entire working process, when the intermediate tank is charged, the argon blowing pipe is opened after the molten steel enters the discharge chamber from the perforation, and the argon gas is introduced into the discharge chamber, squeezing the air originally in the discharge chamber into the air guide pipe for discharge.

[0031] It should be pointed out that the liquid gathering section 24 provided in this embodiment is a downwardly protruding buffer liquid gathering area in the material discharge cavity, which can be confined in this area before the molten steel is cooled.

[0032] 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. A tundish for continuous casting, comprising a tank body (15), wherein a cover plate (16) is arranged on the top of the tank body (15), wherein the lower part of the tank body (15) is connected to a crystallizer via a connecting pipe (17), wherein the top of the cover plate (16) is connected to one end of a feed pipe (8), and the feed pipe (8) is connected to a ladle, wherein: A retaining wall (18) is provided on the cover plate (16), and the retaining wall (18) can be inserted into the tank body (15) and divide the internal cavity of the tank body (15) into a feeding cavity (20) and a discharging cavity (21), an argon blowing mechanism is provided in the discharging cavity (21), a liquid gathering section (24) is provided at the bottom of the discharging cavity (21), and the connecting pipe (17) is connected to the liquid gathering section (24).

2. A continuous casting tundish according to claim 1, characterized in that: The bottom of the retaining wall (18) contacts the bottom of the tank body (15), and a perforation (19) is provided on the upper portion of the retaining wall (18), and the feed cavity (20) and the discharge cavity (21) are connected via the perforation (19).

3. The continuous casting tundish according to claim 1, characterized in that: The feed pipe (8) is in communication with the feed chamber (20).

4. The continuous casting tundish according to claim 1, characterized in that: A protruding portion is provided at one end of the cover plate (16), and an air guide pipe (23) is embedded in the protruding portion. The air guide pipe (23) is in communication with the top of the material discharge chamber (21), and the air guide pipe (23) can be externally connected to an air pump.

5. The continuous casting tundish according to claim 4, characterized in that: The protrusion is located at an end of the cover plate (16) away from the discharge pipe (8).

6. A continuous casting tundish according to claim 5, characterized in that: The argon blowing mechanism comprises an argon blowing tube (22), the argon blowing tube (22) being inserted transversely into the material discharge cavity (21) from a baking hole on one side of the tank body (15), and a baffle for shielding the baking hole is provided on the argon blowing tube (22).

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