Argon blowing device for continuous casting tundish

Abstract

The utility model belongs to continuous casting equipment, and particularly relates to an argon blowing device for a continuous casting tundish. According to the argon blowing device, the blowing unit is provided with three blowing directions, namely transverse wind, inclined wind and downwind, so that the tundish can be effectively isolated from air in the casting process, and the casting quality of molten steel is ensured. The air blowing device specifically comprises an air blowing unit which is installed on a sliding table. The air blowing unit comprises a stand column installed on the sliding table, a shell is arranged on the top of the stand column, and the inner space of the shell is sequentially divided into three independent cavities from top to bottom. Each cavity comprises an air inlet channel and an air outlet cavity communicated with the air inlet channel, and the air outlet cavities are located on the side, facing the liquid level of the tundish, of the shell. Wherein each air inlet channel is communicated with an argon source, the air outlet direction of the transverse air cavity is horizontal, the included angle between the air outlet direction of the inclined air cavity and the liquid level of the tundish is 30-60 degrees, and the air outlet direction of the lower air cavity is vertically downward.

Description

Technical Field

[0001] The utility model relates to continuous casting equipment, in particular to an argon blowing device for a continuous casting tundish. Background Art

[0002] The tundish, a critical component in the continuous casting process in the metallurgical industry, sits between the ladle and the mold, buffering and distributing the molten steel. However, if the molten steel within the tundish is exposed to air before pouring begins, it can easily lead to serious secondary oxidation. In traditional steelmaking and continuous casting processes, the tundish is immediately put into use after baking, lacking the necessary argon purge equipment. This situation causes the amount of dissolved gas in the molten steel to gradually increase during pouring, with no effective measures to reduce this gas content. As a result, the molten steel already contains a certain amount of gas before pouring begins. This gas cannot be effectively expelled during the pouring process, resulting in bubbles or pores within the resulting billet. These quality defects not only directly affect the overall quality of the billet, but also, during the subsequent rolling process, the presence of bubbles and pores can lead to reduced performance of the final product, or even result in scrap. In order to improve this situation, the tundish argon blowing process has been introduced into modern continuous casting technology. By introducing inert gas argon into the tundish, the molten steel can be effectively prevented from coming into contact with the air, reducing the risk of secondary oxidation, and helping to reduce the gas content in the molten steel, thereby improving the quality of the steel billet and ensuring the performance and reliability of the final product.

[0003] To address current production challenges, a new argon-blowing device for the continuous casting tundish in steelmaking is needed. This device can cover the tundish with an inert atmosphere of argon, displacing any remaining air within the tundish and reducing the amount of air in contact with the molten steel. This also reduces the gas content within the molten steel once it enters the tundish, ensuring billet quality during the casting process. Summary of the Invention

[0004] The utility model aims to solve the defects of the prior art and provides an argon blowing device for a continuous casting tundish. The device comprises a blowing unit arranged on one side of the tundish and used to blow argon into the tundish to protect the molten steel from air pollution.

[0005] The blowing unit is mounted on a slide, and the slide is used to drive the blowing unit to move forward and backward relative to the tundish.

[0006] The blowing unit includes a column installed on a slide, with a shell provided on the top of the column. The internal space of the shell is divided into three independent chambers from top to bottom, namely: the upper transverse wind cavity, the middle oblique wind cavity, and the bottom downwind cavity.

[0007] Each cavity includes an air inlet channel and an air outlet cavity connected thereto, and the air outlet cavity is located on the side of the shell facing the liquid surface of the intermediate package; wherein, each air inlet channel is connected to the argon gas source, the air outlet direction of the cross-wind cavity is horizontal, the air outlet direction of the oblique-wind cavity is at an angle of 30-60 degrees to the liquid surface of the intermediate package, and the air outlet direction of the downwind cavity is vertically downward.

[0008] Furthermore, the slide includes a base plate and a slide plate, a screw (lead rod) is installed on the base plate, one end of the screw is provided with a support for support, and the screw can rotate freely relative to the support; the other end of the screw is driven to rotate by a motor; a nut that cooperates with the screw is provided on the slide plate, wherein the middle part of the slide plate is fixedly connected to the nut, and the nut is transmission-connected to the screw.

[0009] Furthermore, the motor is mounted on a motor support, and the motor is connected to the end of the lead screw through a coupling to drive the lead screw to rotate.

[0010] Furthermore, a guide shaft is provided on each side of the base plate and the lead screw, and the lead screw is parallel to the two guide shafts; both ends of each guide shaft are supported and fixed by their own guide shaft supports, and the guide shaft supports are fixed to the base plate; the slide plate is slidably connected to the two guide shafts.

[0011] Specifically, the motor drives the lead screw to rotate, driving the slide plate to move along the guide shaft, and the guide shaft plays a guiding role for the slide plate.

[0012] Furthermore, the bottom of the column is fixed to the upper surface of the slide, and the top of the column is fixedly connected to the shell of the blowing unit.

[0013] Furthermore, the air inlet channels are respectively connected to respective air inlet pipes, and each air inlet pipe is connected to a corresponding argon gas station for providing the argon gas required for argon blowing.

[0014] Furthermore, the side of the air outlet cavity of the cross wind cavity facing the middle package serves as a cross wind panel, and the cross wind panel remains vertical, and an air outlet one is provided on the cross wind panel; the side of the air outlet cavity of the oblique wind cavity facing the middle package is an oblique wind panel, the oblique wind panel is inclined, and the angle A between the oblique wind panel and the horizontal direction is an acute angle; an air outlet two is provided on the oblique wind panel; the air outlet cavity of the downwind cavity is a horizontally arranged downwind panel, and an air outlet three is provided on the downwind panel; and the downwind panel is part of the bottom plate of the shell.

[0015] Specifically, the housing may be a box-type housing.

[0016] Compared with the prior art, the utility model has beneficial effects.

[0017] This utility model's argon blowing device is installed on one side of the tundish's working position. A slide unit is installed at the bottom, enabling the entire argon blowing device to be switched between offline and online operation, facilitating the transport and maintenance of the tundish. The blowing unit features three blowing directions (crosswind, diagonal, and downwind), effectively isolating the tundish from air during the casting process, ensuring the quality of molten steel casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0019] Figure 1 This is a main view of an argon blowing device for a continuous casting tundish.

[0020] Figure 2 It is a three-dimensional visual system for continuous casting tundish argon blowing device. Figure 1 .

[0021] Figure 3 It is a three-dimensional visual system for continuous casting tundish argon blowing device. Figure 2 .

[0022] Figure 4 It is a cross-sectional view of an argon blowing device for a continuous casting tundish.

[0023] Figure 5 It is a schematic diagram of the distribution of cavities in the shell.

[0024] In the figure, 1. slide unit; 2. blowing unit; 3. intermediate package; 101. bottom plate; 102. guide shaft; 103. guide shaft support; 104. motor; 105. motor support; 106. lead screw; 107. nut; 108. slide plate; 201. column; 202. air inlet pipe; 203. shell; 204. cross wind panel; 205. oblique wind panel; 206. downwind panel; 207. air outlet; 208. cross wind cavity; 209. oblique wind cavity; 210. downwind cavity; 2011. air inlet channel. DETAILED DESCRIPTION

[0025] In order to better understand the technical solution of the present invention, a specific implementation plan is provided as follows; and the following solution is only for illustration.

[0026] like Figure 1-5 As shown, the present invention's continuous casting tundish argon blowing device includes a blowing unit 2 positioned on one side of the tundish 3. This blowing unit 2 is used to blow argon gas into the tundish 3 to protect the molten steel from air contamination. The blowing unit 2 is mounted on a slide unit 1, which is used to move the blowing unit 2 back and forth relative to the tundish 3.

[0027] The air blowing unit 2 includes a column 201 mounted on the slide unit 1. A housing 203 is located on top of the column 201. The housing 203 can be a box-shaped housing. The interior of the housing 203 is divided into three independent chambers from top to bottom: an upper transverse air chamber 208, a middle oblique air chamber 209, and a bottom downwind chamber 210.

[0028] Each chamber includes an air inlet channel and a connected air outlet cavity, located on the side of the shell 203 facing the tundish liquid surface. Each air inlet channel is connected to an argon source, and the air inlet channels 2011 are connected to their respective air inlet pipes 202. Each air inlet pipe 202 is connected to a corresponding argon gas station to provide the argon required for argon blowing. The air outlet direction of the cross-wind cavity 208 is horizontal, the air outlet direction of the oblique-wind cavity 209 is at an angle of 30-60 degrees to the tundish liquid surface, and the air outlet direction of the downwind cavity 210 is vertically downward.

[0029] Example 1. The slide unit 1 includes a base plate 101 and a slide plate 108. A lead screw 106 is mounted on the base plate 101. One end of the lead screw 106 is provided with a support bracket, and the lead screw 106 is able to rotate freely relative to the bracket. The other end of the lead screw 106 is driven to rotate by a motor 104. A nut 107 is provided on the slide plate 108, which cooperates with the lead screw 106. The middle portion of the slide plate 108 is fixedly connected to the nut 107, which is in transmission connection with the lead screw 106. The motor 104 is mounted on a motor bracket 105 and connected to the end of the lead screw 106 via a coupling, driving the lead screw 106 to rotate. A guide shaft 102 is mounted on the base plate 101, on either side of the lead screw 106, and is parallel to the two guide shafts 102. Each guide shaft 102 is supported and fixed at both ends by a respective guide shaft support 103, which is also fixed to the base plate 101. A slide plate 108 is slidably connected to the two guide shafts 102. A motor 104 rotates the lead screw 106, driving the slide plate 108 along the guide shafts 102, which guide the slide plate 108. The bottom of the column 201 is fixed to the upper surface of the slide plate 108, and the top of the column 201 is fixed to the housing 203 of the air blowing unit.

[0030] Specifically, a slide plate is installed on the corresponding guide shaft and lead screw. A corresponding nut is provided on the slide plate in cooperation with the lead screw to drive the slide plate to move, and the guide shaft plays a guiding role for the slide plate.

[0031] Preferred solution: the side of the air outlet cavity of the cross wind cavity 208 facing the intermediate ladle 3 serves as the cross wind panel 204, and the cross wind panel 204 remains vertical, and the cross wind panel 204 is provided with an air outlet one; the side of the air outlet cavity of the oblique wind cavity 209 facing the intermediate ladle 3 is the oblique wind panel 205, the oblique wind panel 205 is inclined, and the angle A between the oblique wind panel 205 and the horizontal direction is an acute angle; the oblique wind panel 205 is provided with an air outlet two; the air outlet cavity of the downwind cavity 210 is a horizontally arranged downwind panel 206, and the downwind panel 206 is provided with an air outlet three; and the downwind panel 206 is part of the bottom plate of the shell 203.

[0032] Example 2: The blowing unit is a shell 203, including two end faces, an upper surface, a front surface, a sloped surface, a lower surface, and a rear surface; corresponding cross-wind cavities 208, sloped wind cavities 209, and downwind cavities 210 are arranged inside the front surface, the sloped surface, and the lower surface; each cavity is provided with an air inlet pipe 202, and the air inlet pipe 202 passes through the rear surface. A long air outlet 207 is opened on the corresponding front surface, the sloped surface, and the lower surface of each cavity to realize that the corresponding air inlet pipe gas reaches the corresponding cavity and is blown out from the long air outlet 207.

[0033] Description of the working principle and working process of this utility model:

[0034] 1. When the tundish 3 to be cast is in place and baked, the molten steel is injected into the tundish 3 through the ladle. The slide unit 1 and the blowing unit 2 are installed on the side of the tundish 3.

[0035] 2. At this time, the slide unit 1 is controlled to move so that the blowing unit 2 moves forward to its position (the blowing unit 2 is close to the side of the intermediate package 3), and the air inlet pipe 202 of the blowing unit 2 is connected to the argon station. A steady stream of argon enters the blowing unit 2 through the air inlet pipe. A crosswind cavity 208, an oblique wind cavity 209, and a downwind cavity 210 are provided inside the blowing unit 2. The argon entering the blowing unit 2 passes through the crosswind cavity 208, the oblique wind cavity 209, and the downwind cavity 210 and reaches the air outlet 207 of each cavity.

[0036] 3. Since argon is a high-pressure gas, high-speed gas is formed at the air outlet 207 and blown out from the air outlet 207.

[0037] 4. The crosswind cavity 208 corresponds to the crosswind panel 204 . The high-speed argon gas coming out of the crosswind panel 204 is mainly used to block the air above and the air in the tundish 3 .

[0038] 5. The oblique wind cavity 209 corresponds to the oblique wind panel 205. The high-speed argon gas coming out of the oblique wind panel 205 is mainly used to quickly reach the interior of the tundish 3 and drive out the air inside the tundish 3.

[0039] 6. The downwind cavity 210 corresponds to the downwind panel 206 . The high-speed argon gas coming out of the downwind panel 206 is mainly used to block the air entering the tundish 3 from the edge of the tundish 3 .

[0040] 7. During the operation of the entire blowing unit 2, the blowing unit 2 can protect the molten steel from being polluted by the air during the entire casting process, and can effectively ensure the quality of the cast steel billet.

[0041] 8. After the casting with the tundish 3 is completed, the slide unit 1 is controlled to move so that the blowing unit 2 moves backward into place (the blowing unit 2 is away from the side of the tundish 3), and the argon supply is cut off to facilitate the replacement and maintenance of the tundish 3.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. Therefore, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A continuous casting tundish argon blowing device, characterized in that: The invention comprises a blowing unit (2) arranged on one side of the tundish (3), wherein the blowing unit (2) is used for blowing argon gas into the tundish (3); The blowing unit (2) is mounted on a slide unit (1), and the blowing unit (2) comprises a column (201) mounted on the slide unit (1); a shell (203) is provided on the top of the column (201); the internal space of the shell (203) is divided into three independent chambers from top to bottom, namely: an upper transverse air cavity (208), a middle oblique air cavity (209), and a bottom downwind cavity (210); Each cavity comprises an air inlet channel (2011) and an air outlet cavity connected thereto, and the air outlet cavity is located on the side of the shell (203) facing the liquid surface of the intermediate package; wherein each air inlet channel (2011) is connected to an argon gas source; the air outlet direction of the cross-wind cavity (208) is horizontal, the angle between the air outlet direction of the oblique-wind cavity (209) and the liquid surface of the intermediate package is 30-60 degrees, and the air outlet direction of the downwind cavity (210) is vertically downward.

2. The argon blowing device for continuous casting tundish according to claim 1, characterized in that: The slide unit (1) comprises a base plate (101) and a slide plate (108); a screw (106) is mounted on the base plate (101); one end of the screw (106) is provided with a support seat, and the screw (106) can rotate freely relative to the support seat; the other end of the screw (106) is driven to rotate by a motor (104); a nut (107) matching the screw (106) is provided on the slide plate (108), wherein the middle portion of the slide plate (108) is fixedly connected to the nut (107), and the nut (107) is transmission-connected to the screw (106).

3. The argon blowing device for continuous casting tundish according to claim 2, characterized in that: The motor (104) is mounted on a motor support (105). The motor (104) is connected to the end of the lead screw (106) via a coupling to drive the lead screw (106) to rotate.

4. The continuous casting tundish argon blowing device according to claim 2 or 3, characterized in that: A guide shaft (102) is provided on each side of the base plate (101) and the lead screw (106), and the lead screw (106) is parallel to the two guide shafts (102); both ends of each guide shaft (102) are supported and fixed by respective guide shaft supports (103), and the guide shaft supports (103) are fixed on the base plate (101); the slide plate (108) is slidably connected to the two guide shafts (102).

5. The argon blowing device for continuous casting tundish according to claim 2, characterized in that: The bottom of the column (201) is fixed to the upper surface of the slide plate (108), and the top of the column (201) is fixedly connected to the bottom of the shell (203).

6. The argon blowing device for continuous casting tundish according to claim 1, characterized in that: The air inlet channels (2011) are respectively connected to respective air inlet pipes (202), and each air inlet pipe (202) is connected to a corresponding argon gas station to provide the argon gas required for argon blowing.

7. The argon blowing device for continuous casting tundish according to claim 1, characterized in that: The side of the air outlet cavity of the cross wind cavity (208) facing the middle bag (3) is a cross wind panel (204), and the cross wind panel (204) is kept vertical, and the cross wind panel (204) is provided with an air outlet 1; the side of the air outlet cavity of the oblique wind cavity (209) facing the middle bag (3) is an oblique wind panel (205), the oblique wind panel (205) is inclined, and the angle A between the oblique wind panel (205) and the horizontal direction is an acute angle; the oblique wind panel (205) is provided with an air outlet 2; the air outlet cavity of the downwind cavity (210) is a horizontally arranged downwind panel (206), and the downwind panel (206) is provided with an air outlet 3; and the downwind panel (206) is part of the bottom plate of the shell (203).

Images