Long nozzle for argon blowing sealing

Abstract

The utility model discloses a long nozzle for argon blowing sealing, which comprises a first shell, the first shell is positioned on one side, provided with a bowl part, of the long nozzle, a second shell is arranged on the periphery of the first shell, the second shell and the first shell are arranged at an interval to form an argon channel, and an argon blowing nozzle communicated with the argon channel is arranged on the second shell; the double-interlayer shell is arranged to seal the argon channel, the first shell is fixedly connected with the long nozzle, the second shell is located outside the first shell and fixed to the first shell, and an interlayer is directly formed between the first shell and the second shell to serve as the argon channel, so that the sealing effect can be more effectively achieved; the effect of preventing outside air from entering the flowing molten steel can be enhanced, and then the situation that the quality of the molten steel is affected by oxygen and nitrogen increase of the molten steel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting functional refractory materials technology, specifically to a long nozzle for argon blowing sealing. Background Technology

[0002] The long nozzle is used between the ladle and the tundish to protect molten steel from secondary oxidation and prevent splashing, playing a crucial role in improving safety during the casting process. The long nozzle primarily functions as a guide, directing the molten steel from the ladle to the tundish. During this process, to prevent outside air from entering the flowing molten steel and causing secondary oxidation and nitriding, which significantly impact the mechanical and processing properties of high-quality steels, an argon-blown seal is required at the nozzle's cup to prevent air from entering the molten steel.

[0003] The currently used argon-blowing nozzle has the risk of the argon gas channel being blocked by fire mud. This results in the argon gas not being able to uniformly, stably, and continuously and effectively prevent air from entering the molten steel. Some air will always enter the molten steel due to the incomplete sealing of the argon gas, causing oxygen and nitrogen increase in the molten steel. This is especially true when casting certain high-quality steel grades, which can easily cause fluctuations in the acid-soluble aluminum content in the molten steel, thereby affecting the stability of the billet quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, a long nozzle for argon blowing and sealing is proposed, which solves the problem of the risk of argon gas passage being blocked by fire mud in the long nozzle for argon blowing mentioned in the background technology.

[0005] To achieve the above objectives, the present invention proposes the following technologies:

[0006] A long nozzle for argon blowing and sealing includes a first housing located on one side of the bowl portion of the long nozzle, a second housing disposed around the periphery of the first housing, the second housing being spaced apart from the first housing to form an argon gas channel, and an argon blowing nozzle communicating with the argon gas channel being disposed on the second housing.

[0007] Furthermore, the first housing is arranged around the long water inlet and coaxial with the long water inlet, and the shape of the first housing matches the shape of the bowl part of the long water inlet.

[0008] Furthermore, fire clay is filled between the first housing and the long nozzle to facilitate the fixation of the first housing onto the long nozzle. The first housing includes a first annular baffle located at the top to limit and seal the fire clay.

[0009] Furthermore, the first annular baffle is located below the top end face of the long nozzle, and the argon gas channel is at least partially located between the second housing and the long nozzle.

[0010] Furthermore, the second housing is fitted around the first housing and the long water inlet, and the second housing is coaxially arranged with the long water inlet.

[0011] Furthermore, the second housing includes a second annular baffle located at the bottom and fixedly connected to the outer surface of the first housing, the second annular baffle being used to seal the bottom end of the argon gas channel.

[0012] Furthermore, the second housing also includes a third annular baffle located at the top, the third annular baffle being positioned above the end face of the long water inlet and spaced apart from the long water inlet.

[0013] Furthermore, the gap between the first housing and the second housing is between 1mm and 5mm.

[0014] Furthermore, the vertical distance between the first annular baffle and the third annular baffle is between 1mm and 30mm.

[0015] Furthermore, the vertical distance between the second and third annular baffles is between 10mm and 100mm.

[0016] Compared with the prior art, the comprehensive effects brought about by this utility model include:

[0017] In this application, a double-layered shell is used to seal the argon gas channel. The first shell is fixedly connected to the long nozzle, and the second shell is located outside the first shell and fixed to it. The two shells form an interlayer as the argon gas channel, which can more effectively play a sealing role and enhance the effect of preventing outside air from entering the flowing molten steel, thereby avoiding oxygen and nitrogen enrichment in the molten steel and affecting the quality of the molten steel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of a local part of the structure.

[0020] Legend: 1. First shell; 2. Long nozzle; 3. Second shell; 4. Argon gas channel; 5. Argon blowing nozzle; 6. Fire clay; 7. First annular baffle; 8. Second annular baffle; 9. Third annular baffle. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In this document, terms such as “up,” “down,” “left,” “right,” and “top” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 2 As shown, a long nozzle for argon blowing and sealing includes a first housing 1, which is located on one side of the long nozzle 2 where the bowl is set. A second housing 3 is provided around the first housing 1. The second housing 3 is spaced apart from the first housing 1 to form an argon gas channel 4. An argon blowing nozzle 5 connected to the argon gas channel 4 is provided on the second housing 3.

[0024] By setting up a double-layered shell, the argon gas channel 4 is sealed. The first shell 1 is fixedly connected to the long nozzle 2, and the second shell 3 is located outside the first shell 1 and fixed to it. The two directly form an interlayer as the argon gas channel 4, which can more effectively play a sealing role and enhance the effect of preventing outside air from entering the flowing molten steel, thereby avoiding the increase of oxygen and nitrogen in the molten steel and affecting the quality of the molten steel.

[0025] Meanwhile, due to the adoption of a double-layer partition design, the force exerted on the neck of the long sprue 2 by the robotic arm during use can be effectively alleviated, thus reducing the problem of neck stress and reducing the risk of breakage of the long sprue 2 due to external mechanical stress.

[0026] Specifically, the long nozzle 2 is made of carbon-containing material. Because argon completely isolates the air, it also effectively prevents the oxidation of the material itself, significantly improves the material's resistance to molten steel erosion, and extends the service life of the long nozzle 2.

[0027] In the long nozzle for argon blowing and sealing in this embodiment, the first housing 1 is arranged around the long nozzle 2 and is coaxial with the long nozzle 2, and the shape of the first housing 1 matches the shape of the bowl part of the long nozzle 2.

[0028] The above settings ensure that the force is uniform at all points where the first housing 1 is connected to the long water inlet 2, thereby improving the stability of the first housing 2 on the long water inlet 2.

[0029] In the long nozzle for argon blowing sealing in this embodiment, fire clay 6 is filled between the first housing 1 and the long nozzle 2 so that the first housing 1 can be fixed on the long nozzle 2. The first housing 1 includes a first annular baffle 7 located at the top to limit and seal the fire clay 6.

[0030] The first housing 1 and the long water inlet 2 are connected by fire putty 6. At the same time, the first annular baffle 7 on the top of the first housing 1 limits and seals the fire putty 6 between the first housing 1 and the long water inlet, thereby effectively preventing the fire putty 6 from entering the argon gas channel 4 and causing blockage. This ensures that the argon gas flows evenly and stably in the argon gas channel 4, thereby effectively isolating the air.

[0031] Specifically, the bottom of the fire putty 6 is flush with or lower than the bottom of the first housing 1. While connecting the fire putty 6 to the first housing 1, it also protects the outer surface of the long nozzle 2.

[0032] In this embodiment, the long nozzle for argon blowing and sealing is located below the top end face of the long nozzle 2, and the argon channel 4 is at least partially located between the second housing 3 and the long nozzle 2.

[0033] By setting up the above, the cross-sectional area of ​​argon gas flow in the argon gas channel 4 is increased, so that the argon gas channel 4 can accommodate enough argon gas to ensure the sealing effect. At the same time, the first annular baffle 7 is tightly fitted with the outer diameter of the long water nozzle 2, which improves the sealing effect on the fire clay 6.

[0034] Specifically, with the above configuration, the argon channel 4 includes a lower portion located between the second housing 3 and the first housing 1, and an upper portion located between the second housing 3 and the long nozzle 2.

[0035] In this embodiment, the long nozzle for argon blowing sealing is provided with the second housing 3 sleeved around the first housing 1 and the long nozzle 2, and the second housing 3 and the long nozzle 2 are coaxially arranged.

[0036] The axes of the second shell 3, the first shell 1, and the long nozzle 2 are collinear, so that the argon gas channel 4 between the first shell 1 and the second shell 3 has the same width at all points in the circumferential direction of the long nozzle 2, so that the argon gas flows uniformly in the argon gas channel 4.

[0037] With the above setup, argon gas enters the argon gas channel 4 between the double iron shells through the argon nozzle 5. The argon gas entering the argon gas channel 4 is evenly and without resistance in the annular channel, and is released through the gap between the end of the long nozzle 2 and the second shell 3, effectively isolating air and preventing some air from entering the flowing molten steel. This can efficiently solve the problems of secondary oxidation and nitrogen addition in molten steel.

[0038] In the long nozzle for argon blowing sealing in this embodiment, the second housing 3 includes a second annular baffle 8 located at the bottom and fixedly connected to the outer surface of the first housing 1. The second annular baffle 8 is used to seal the bottom end of the argon channel 4.

[0039] Specifically, the second annular baffle 8 is welded to the outer circumferential surface of the first shell 1 to prevent air from entering the argon channel 4 at the connection between the first shell 1 and the second shell 3, thus preventing oxygen and nitrogen from increasing in the molten steel and affecting its quality.

[0040] Preferably, the second housing 3 and the first housing 1 have a certain degree of overlap, and the argon blowing nozzle 5 is located at the position of the second housing 3 at the overlapping part, that is, the height of the argon blowing nozzle 5 is lower than the first annular baffle 7.

[0041] With the above configuration, argon gas first enters the lower part of the argon gas channel 4 through the argon nozzle 5, blows directly onto the outside of the second shell 1, and then enters the upper part, thereby avoiding damage to the surface of the long nozzle 2 caused by the impact of argon gas.

[0042] In this embodiment, the second housing 3 further includes a third annular baffle 9 located at the top. The third annular baffle 9 is located above the end face of the long water inlet 2 and is spaced apart from the long water inlet 2.

[0043] With the above setup, argon gas, evenly distributed within the argon channel 4, flows out from the gap between the third annular baffle 9 and the long nozzle 2. During continuous casting, molten steel enters the long nozzle 2 through the ladle outlet and then enters the tundish. Argon gas flows out from the circumferentially distributed outlet between the end face of the third annular baffle 9 and the long nozzle 2, surrounding the steel flow and effectively isolating it from air to prevent contamination of the molten steel.

[0044] In the long nozzle for argon blowing sealing in this embodiment, the gap between the first housing 1 and the second housing 3 is between 1mm and 5mm, the vertical distance between the first annular baffle 7 and the third annular baffle 9 is between 1mm and 30mm, and the vertical distance between the second annular baffle 8 and the third annular baffle 9 is between 10mm and 100mm.

[0045] Preferably, the distance between the first shell 1 and the second shell 3 of the long water inlet 2 bowl is controlled to 3mm, a distance of 20mm is left between the top of the first shell 1 and the top of the second shell 3 of the long water inlet 2 bowl, and the first shell 1 is bonded to the long water inlet 2 bowl by fire putty 6, the first shell 1 and the second shell 3 are overlapped and welded together for sealing, the height of the overlap is controlled to be 30mm, and the size of the argon blowing nozzle 5 is 5mm.

[0046] The argon-blown sealing long nozzle produced in the above manner has an argon flow rate of 151 NL / min at an argon pressure of 0.2 MPa. Compared with existing normal products, the product produced in this way improves the quality of the billet by about 35% in terms of preventing steel oxidation, preventing nitrogen accumulation, stabilizing the acid-soluble aluminum content in the steel, and reducing inclusions of metal oxides and nitrides, and achieves a very good sealing effect.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Although embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long nozzle for argon blowing sealing, characterized in that, It includes a first shell located on one side of the bowl-shaped part of the long water inlet, and a second shell disposed around the periphery of the first shell. The second shell and the first shell are spaced apart to form an argon gas channel, and an argon nozzle connected to the argon gas channel is disposed on the second shell.

2. The long nozzle for argon blowing sealing according to claim 1, characterized in that, The first housing is arranged around the long water inlet and is coaxial with the long water inlet, and the shape of the first housing matches the shape of the bowl part of the long water inlet.

3. The long nozzle for argon blowing sealing according to claim 2, characterized in that, Fire clay is filled between the first housing and the long water inlet to facilitate the fixation of the first housing onto the long water inlet. The first housing includes a first annular baffle at the top that limits and seals the fire clay.

4. The long nozzle for argon blowing sealing according to claim 3, characterized in that, The first annular baffle is located below the top end face of the long nozzle, and the argon gas channel is at least partially located between the second shell and the long nozzle.

5. The long nozzle for argon blowing sealing according to claim 3, characterized in that, The second housing is fitted around the first housing and the long water inlet, and the second housing is coaxially arranged with the long water inlet.

6. The long nozzle for argon blowing sealing according to claim 5, characterized in that, The second housing includes a second annular baffle located at the bottom and fixedly connected to the outer surface of the first housing. The second annular baffle is used to seal the bottom end of the argon gas channel.

7. The long nozzle for argon blowing sealing according to claim 6, characterized in that, The second housing also includes a third annular baffle located at the top, which is positioned above the end face of the long water inlet and spaced apart from the long water inlet.

8. The long nozzle for argon blowing sealing according to claim 1, characterized in that, The gap between the first housing and the second housing is between 1 mm and 5 mm.

9. A long nozzle for argon blowing sealing according to claim 7, characterized in that, The vertical distance between the first annular baffle and the third annular baffle is between 1mm and 30mm.

10. A long nozzle for argon blowing sealing according to claim 7, characterized in that, The vertical distance between the second and third annular baffles is between 10mm and 100mm.

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