Argon full-protection system for long nozzle of vanadium-protecting smelting crystallizer

Abstract

The utility model provides a vanadium protection smelting crystallizer long nozzle argon full protection system, which comprises a long nozzle body, an argon blowing pipe and a hoisting assembly, the hoisting assembly comprises a lifting hook, a lower supporting rod and a lower pressing piece, one end of the lower supporting rod is provided with a clamping ring sleeved on the long nozzle body, the middle part of the lower supporting rod is lapped on the lifting hook, and the other end of the lower supporting rod is lapped on the lower pressing piece. The lower supporting rod can vertically swing under the action of the lower pressing piece so as to drive the long nozzle body to abut against the bottom of the tundish. According to the argon full-protection system for the long nozzle of the vanadium-protecting smelting crystallizer, the argon is blown through the argon blowing pipe, so that the argon escapes outwards at the gap between the long nozzle body and the tundish, air suction is effectively prevented, and secondary oxidation of molten steel is avoided; on the basis, the outer end of the lower supporting rod is pressed downwards through the lower pressing piece, so that the clamping ring drives the long nozzle body to upwards abut against and be installed on the tundish, the installation and replacement process of the long nozzle body is greatly simplified, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical continuous casting, and particularly relates to an argon full protection system for the long nozzle of a mold in vanadium-preserving smelting. Background Art

[0002] At present, in the process of molten steel smelting, the method of vanadium-preserving smelting is often adopted. In the above method, during the steelmaking process, the residual vanadium in the molten steel can be fully utilized, which can play the role of refining grains and improving the strength of steel. During continuous casting operation, the molten steel is generally injected into the tundish through a long nozzle at the bottom of the ladle, and a bagged loose covering agent is added into the tundish. The covering agent melts on the surface of the molten steel in the tundish to completely cover the molten steel, ensuring that the molten steel in the tundish is completely isolated from the atmosphere and no secondary oxidation will occur. During this period, the molten steel enters the mold through the submerged nozzle below the tundish, and the molten steel forms a billet after passing through the mold.

[0003] In the prior art, the special-shaped billet continuous caster was initially designed with two casting steel flows for a single-strand billet. The submerged nozzle of the mold adopts a semi-open funnel-shaped nozzle, and the service life is 1-2 hours. During the operation process, it is necessary to intermittently carry out oxygen burning treatment on the cold steel on the nozzle, and the oxidized steel slag directly flows into the molten steel after treatment, increasing the pollution of the molten steel. In addition, the exposed casting of the molten steel increases the secondary oxidation of the molten steel in the air, affecting the quality of the molten steel and the qualification rate of the rolled products. Summary of the Utility Model

[0004] The embodiment of the utility model provides an argon full protection system for the long nozzle of a mold in vanadium-preserving smelting, which can effectively prevent the inhalation of air, avoid the secondary oxidation of the molten steel, and at the same time greatly simplify the installation and replacement process of the long nozzle body, reducing the labor intensity of workers.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide an argon full protection system for the long nozzle of a mold in vanadium-preserving smelting, including a long nozzle body, an argon blowing pipe connected to the outer periphery of the long nozzle body and communicating with the long nozzle body, and a hoisting assembly for installing the long nozzle body onto the tundish. The hoisting assembly includes a hook connected below the tundish, a lower support rod connected to the long nozzle body, and a pressing member connected to the outer end of the lower support rod. A clamping ring sleeved on the long nozzle body is provided at one end of the lower support rod, the middle part of the lower support rod is lapped on the hook, and the lower support rod can swing vertically under the action of the pressing member to drive the long nozzle body to press against the bottom of the tundish.

[0006] As another embodiment of the utility model, the long nozzle body includes a cylindrical part and a frustum part connected above the cylindrical part. A conical hole adapted to the sliding plate of the tundish is provided on the upper end surface of the frustum part, and the depth of the conical hole is greater than the inclined height of the sliding plate.

[0007] As another embodiment of the present utility model, an argon gas channel communicating with the conical hole is provided on the inverted table portion, the argon blowing pipe is communicated with the argon gas channel, and a first sealing ring capable of surrounding the outer periphery of the lower slide plate is arranged in the conical hole.

[0008] As another embodiment of the present utility model, the argon gas channel includes an annular channel arranged on the outer periphery of the inverted table portion and a radial channel arranged on the upper end surface of the inverted table portion. The annular channel is communicated with the conical hole through the radial channel, and the argon blowing pipe is communicated with the annular channel.

[0009] As another embodiment of the present utility model, a sealing sleeve ring is sleeved on the outer periphery of the inverted table portion, and a cover is arranged at the upper end of the inverted table portion. The cover has a ring blocking portion extending axially downward along the long nozzle body and sleeved on the outer periphery of the sealing sleeve ring. An annular channel is formed by enclosing the inner wall of the ring blocking portion, the outer wall of the inverted table portion and the upper end surface of the sealing sleeve ring.

[0010] As another embodiment of the present utility model, the radial channel includes a plurality of grooves extending radially along the long nozzle body. The grooves are arranged at intervals in the circumferential direction of the inverted table portion, and the grooves are respectively communicated with the conical hole and the annular channel.

[0011] As another embodiment of the present utility model, the hoisting assembly further includes a hinge seat connected to the main argon gas pipeline, and the upper end of the lifting hook is hinged to the hinge seat through a hinge shaft.

[0012] As another embodiment of the present utility model, the clamping ring includes a fixed half-ring, a movable half-ring and a fastener for connecting the fixed half-ring and the movable half-ring. The fixed half-ring and the movable half-ring are respectively clamped on the outer periphery of the cylindrical portion.

[0013] As another embodiment of the present utility model, the pressing member includes a counterweight block and a hook connected to the counterweight block. The hook is hung on the lower supporting rod, and a blocking column extending upward is connected to the outer periphery of the lower supporting rod. The blocking column is used to limit the pressing member.

[0014] As another embodiment of the present utility model, a second sealing ring is sleeved on the outer periphery of the cylindrical portion, and the second sealing ring is made of fiber paper material.

[0015] The beneficial effects of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model are as follows: Compared with the prior art, in the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer of the present utility model, argon is blown into the long nozzle body through the argon blowing pipe, and the argon escapes outward at the gap between the long nozzle body and the tundish, effectively preventing the inhalation of air, thereby avoiding secondary oxidation during the process of molten steel flowing into the crystallizer and ensuring the quality of the rolling products. On this basis, the middle part of the lower supporting rod is lapped on the hook, and the outer end of the lower supporting rod is pressed down by the pressing member to make the lower supporting rod swing vertically, and then the clamping ring drives the long nozzle body to press upward and be installed on the tundish. This structure not only helps to reduce the installation gap between the long nozzle body and the tundish, but also greatly simplifies the installation and replacement process of the long nozzle body and reduces the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the installation state of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the embodiment of the present utility model;

[0018] Figure 2 For the embodiment of the present utility model Figure 1 It is an enlarged structural diagram of part A in the figure;

[0019] Figure 3 For the embodiment of the present utility model Figure 1 It is a sectional structural diagram of the embodiment;

[0020] Figure 4 For the embodiment of the present utility model Figure 3 It is an enlarged structural diagram of part B in the figure;

[0021] Figure 5 It is a schematic structural diagram of the arrangement of the grooves provided by the embodiment of the present utility model.

[0022] Among them, the reference numerals in the figures are as follows:

[0023] 1. Long nozzle body; 11. Inclined platform part; 12. Cylindrical part; 13. Tapered hole; 14. First sealing ring; 15. Annular channel; 16. Radial channel; 161. Groove; 17. Sealing sleeve ring; 18. Cover; 181. Ring blocking part; 19. Second sealing ring; 2. Lifting assembly; 21. Hook; 22. Lower support rod; 221. Stopper; 23. Pressing part; 231. Hook; 232. Counterweight; 24. Hinge seat; 25. Hinge shaft; 26. Clamping ring; 261. Fixed half-ring; 262. Movable half-ring; 263. Fastener; 3. Argon blowing pipe; 10. Tundish; 101. Lower slide plate; 20. Mold; 30. Main argon pipeline. Detailed implementation manners

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, 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, and thus cannot be understood as a limitation to the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present invention, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0026] Please refer to Figure 1 and Figure 5, the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model will be described. The argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer includes a long nozzle body 1, an argon blowing pipe 3 connected to the outer periphery of the long nozzle body 1 and communicating with the long nozzle body 1, and a hoisting assembly 2 for installing the long nozzle body 1 onto the tundish 10. The hoisting assembly 2 includes a hook 21 connected to the lower part of the tundish 10, a lower supporting rod 22 connected to the long nozzle body 1, and a pressing member 23 connected to the outer end of the lower supporting rod 22. A clamping ring 26 sleeved on the long nozzle body 1 is provided at one end of the lower supporting rod 22. The middle part of the lower supporting rod 22 is lapped on the hook 21. The lower supporting rod 22 can swing vertically under the action of the pressing member 23 to drive the long nozzle body 1 to press against the bottom of the tundish 10.

[0027] In the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided in this embodiment, compared with the prior art, argon is blown into the long nozzle body 1 through the argon blowing pipe 3, and the argon escapes outward at the gap between the long nozzle body 1 and the tundish 10, effectively preventing the inhalation of air, thereby avoiding secondary oxidation during the process of molten steel flowing into the crystallizer 20 and ensuring the quality of the rolled product. On this basis, the middle part of the lower supporting rod 22 is lapped on the hook 21. By pressing the outer end of the lower supporting rod 22 with the pressing member 23, the lower supporting rod 22 swings vertically, and then the clamping ring 26 drives the long nozzle body 1 to press upward and be installed on the tundish 10. This structure not only helps to reduce the installation gap between the long nozzle body 1 and the tundish 10, but also greatly simplifies the installation and replacement process of the long nozzle body 1 and reduces the labor intensity of workers.

[0028] It should be noted that a sliding plate 101 is connected to the bottom of the tundish 10 to control the outflow of molten steel in the tundish 10. The molten steel flows into the crystallizer 20 through the long nozzle body 1. The sliding plate 101 has a cylindrical structure, and the lower end has a conical inclined surface with a gradually decreasing diameter from top to bottom. The upper end of the long nozzle body 1 is sleeved on the conical inclined surface of the sliding plate 101. To ensure the stability of the sleeve connection, in this embodiment, the height of the conical inclined surface of the sliding plate 101 is increased, and the height of the sliding plate 101 is increased from 100 mm in the prior art to 130 mm. By using the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model, the total oxygen and nitrogen content in the molten steel can be reduced by 50 - 80 ppm, and the service time of the long nozzle body 1 can be extended to 5 - 6 hours.

[0029] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model, refer to Figure 3 and Figure 4, the long nozzle body 1 includes a cylindrical portion 12 and a frustum portion 11 connected above the cylindrical portion 12. A conical hole 13 adapted to the lower slide plate 101 of the tundish 10 is provided on the upper end surface of the frustum portion 11, and the depth of the conical hole 13 is greater than the inclined surface height of the lower slide plate 101.

[0030] In this embodiment, the diameter of the frustum portion 11 is larger than that of the cylindrical portion 12, so as to facilitate the assembly of the conical hole 13 and the lower slide plate 101 on the frustum portion 11, and the strength of the long nozzle body 1 can be ensured. The depth of the conical hole 13 is greater than the height of the inclined surface of the lower slide plate 101, that is, the lower orifice of the conical hole 13 is lower than the lower edge of the lower slide plate 101, which can ensure that the conical inclined surface of the lower slide plate 101 can be completely inserted into the conical hole 13, thereby ensuring the sealing performance between the long nozzle body 1 and the lower slide plate 101. At the same time, the conical hole 13 can stabilize the flow rate of molten steel and improve the connection stability between the long nozzle body 1 and the tundish 10.

[0031] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting mold provided by the present utility model, refer to Figure 4 , an argon channel communicating with the conical hole 13 is provided on the frustum portion 11, the argon blowing pipe 3 is communicated with the argon channel, and a first sealing ring 14 capable of surrounding the outer periphery of the lower slide plate 101 is provided in the conical hole 13.

[0032] In this embodiment, the first sealing ring 14 is made of fiber paper, has good thermal stability and good air permeability. The first sealing ring 14 fills the gap between the long nozzle body 1 and the tundish 10, and when the argon blowing pipe 3 blows argon into the conical hole 13 through the argon channel, the first sealing ring 14 can also guide the argon to escape outward along the gap between the long nozzle body 1 and the tundish 10, thereby preventing air from being sucked into the molten steel through the above-mentioned gap.

[0033] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting mold provided by the present utility model, refer to Figure 4 , the argon channel includes an annular channel 15 provided on the outer periphery of the frustum portion 11 and a radial channel 16 provided on the upper end surface of the frustum portion 11. The annular channel 15 is communicated with the conical hole 13 through the radial channel 16, and the argon blowing pipe 3 is communicated with the annular channel 15.

[0034] In this embodiment, the annular channel 15 is arranged on the outer periphery of the inverted table portion 11. The argon blowing pipe 3 is connected to the inverted table portion 11 and communicated with the annular channel 15, which is beneficial to the stable and reliable connection of the argon blowing pipe 3. A radial channel 16 is arranged on the upper end surface of the inverted table portion 11. The radial channel 16 is communicated with the conical hole 13, and the annular channel 15 is communicated with the radial channel 16. Thus, the argon gas entering from the argon blowing pipe 3 sequentially passes through the annular channel 15 and the radial channel 16 and is blown into the conical hole 13, and then escapes through the gap between the lower slide plate 101 and the long nozzle body 1. The arrangement of the annular channel 15 and the radial channel 16 is beneficial to reducing the volume of the long nozzle body 1 and the processing difficulty on the premise of ensuring the argon gas flow.

[0035] As a specific embodiment of the long nozzle argon full protection system for vanadium preservation smelting crystallizer provided by the present utility model, refer to Figure 4 , a sealing sleeve ring 17 is sleeved on the outer periphery of the inverted table portion 11. A cover 18 is arranged at the upper end of the inverted table portion 11. The cover 18 has an annular blocking portion 181 extending downward along the axis of the long nozzle body 1 and sleeved on the outer periphery of the sealing sleeve ring 17. The inner wall of the annular blocking portion 181, the outer wall of the inverted table portion 11 and the upper end surface of the sealing sleeve ring 17 enclose the annular channel 15.

[0036] In this embodiment, the sealing sleeve ring 17 is wrapped around the outer periphery of the inverted table portion 11, and there is a certain distance between the upper end surface of the sealing sleeve ring 17 and the upper end surface of the inverted table portion 11. The cover 18 is arranged at the upper end of the inverted table portion 11 to seal the radial channel 16 on the upper end surface of the inverted table portion 11. At the same time, the annular blocking portion 181 extends downward and is sleeved on the outer periphery of the sealing sleeve ring 17. By using the height difference between the sealing sleeve ring 17 and the inverted table portion 11, the inner peripheral wall of the blocking ring portion, the outer peripheral wall of the inverted table portion 11 and the upper end surface of the sealing sleeve ring 17 enclose to form the annular channel 15, and the annular channel 15 is communicated with the radial channel 16 inside the cover 18. The inner end of the argon blowing pipe 3 passes through the annular blocking portion 181 and is communicated with the annular channel 15. The above structure reduces the processing difficulty of the annular channel 15, and the arrangement of the sealing sleeve ring 17 and the cover 18 also helps to increase the strength of the inverted table portion 11.

[0037] As a specific embodiment of the long nozzle argon full protection system for vanadium preservation smelting crystallizer provided by the present utility model, refer to Figure 4 and Figure 5 , the radial channel 16 includes several grooves 161 extending along the radial direction of the long nozzle body 1. The grooves 161 are arranged at intervals along the circumferential direction of the inverted table portion 11, and the grooves 161 are respectively communicated with the conical hole 13 and the annular channel 15.

[0038] In this embodiment, a plurality of radially extending grooves 161 are machined on the upper end surface of the inverted table portion 11 to form a radial channel 16, which does not additionally increase the volume of the long nozzle body 1 and has a simple machining process. The groove 161 extends radially through the long nozzle body 1, enabling the conical hole 13 to communicate with the annular channel 15. Meanwhile, the cover 18 is arranged on the upper end surface of the inverted table portion 11, capable of closing the upper opening of the groove 161 to prevent excessive loss of argon. The plurality of grooves 161 are arranged at intervals along the circumferential direction of the inverted table portion 11, and introduce the argon in the annular channel 15 into the conical hole 13 respectively, ensuring that argon can enter the gap between the long nozzle body 1 and the lower slide plate 101 from multiple angles, and cooperating with the first sealing ring 14 for comprehensive argon sealing.

[0039] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model, refer to Figure 1 , the lifting assembly 2 further includes a hinge seat 24 connected to the argon main pipeline 30, and the upper end of the lifting hook 21 is hinged to the hinge seat 24 through a hinge shaft 25.

[0040] In this embodiment, the hinge seat 24 is arranged on the outer peripheral wall of the argon main pipeline 30, an installation ring is arranged at the upper end of the lifting hook 21, and the hinge shaft 25 passes through the installation ring and is connected to the hinge seat 24, enabling the lifting hook 21 to swing around the hinge shaft 25, so that the lower support rod 22 can adapt to different lifting angles without frequently lifting the lower support rod 22 to adjust the overlapping support position between the lower support rod 22 and the lifting hook 21.

[0041] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model, refer to Figure 1 , the clamping ring 26 includes a fixed half ring 261, a movable half ring 262 and a fastener 263 for connecting the fixed half ring 261 and the movable half ring 262, and the fixed half ring 261 and the movable half ring 262 are respectively clamped on the outer periphery of the cylindrical portion 12.

[0042] In this embodiment, the fixed half ring 261 and the movable half ring 262 are detachably connected through the fastener 263, and at the same time, the clamping ring 26 can adapt to the clamping of long nozzle bodies 1 with different diameters. During actual use, the fastener 263 does not need to be tightened, and only needs to play the role of connecting the fixed half ring 261 and the movable half ring 262. Due to the limitation of the relatively large inverted table portion 11, the clamping ring 26 will not slip off the long nozzle body 1 during the lifting process, and when the outer end of the lower pressing member 23 presses down the lower support rod 22, the clamping ring 26 can push up the inverted table portion 11 to make the conical hole 13 sleeved on the lower slide plate 101, realizing the connection between the long nozzle body 1 and the tundish 10.

[0043] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium-preserving smelting crystallizer provided by the present utility model, refer toFigure 2 The pressing member 23 includes a counterweight 232 and a hook 231 connected to the counterweight 232. The hook 231 is hooked on the lower support rod 22, and a stop post 221 extending upward is connected to the outer periphery of the lower support rod 22. The stop post 221 is used to limit the pressing member 23.

[0044] In this embodiment, after connecting the clamping ring 26 to the cylindrical portion 12, the operator holds the lower support rod 22 and lapps it on the hook 21, and presses the outer end of the lower support rod 22 to make the clamping ring 26 push the inverted table portion 11 upward to install the long nozzle body 1. During the subsequent pouring process, the long nozzle body 1 needs to maintain the above installation state, that is, the outer end of the lower support rod 22 needs to maintain a pressed state. At this time, the outer end of the lower support rod 22 can be kept in a pressed state by hanging the counterweight 232 on the outer end of the lower support rod 22.

[0045] Specifically, the counterweight 232 can be made of a cast steel piece with a relatively high density. The hook 231 is welded to the upper end of the counterweight 232 to facilitate the hanging of the counterweight 232. The stop post 221 is provided on the lower support rod 22 to prevent the counterweight 232 from slipping off the lower support rod 22. More specifically, a heat insulation sleeve is provided on the outer peripheral wall of the lower support rod 22 to facilitate the operator's grip.

[0046] As a specific implementation manner of the argon full protection system for the long nozzle of the vanadium protection smelting crystallizer provided by the present invention, refer to Figure 3 A second sealing ring 19 is sleeved on the outer periphery of the cylindrical portion 12. The second sealing ring 19 is made of fiber paper.

[0047] In this embodiment, the second sealing ring 19 is made of high-temperature-resistant fiber paper, which has good resistance to the erosion of molten steel and slag, and can play a role in heat insulation and protection for the cylindrical portion 12 at high temperatures. Further, the second sealing ring 19 is made of fiber paper, which has good detachability, simple usage method, high safety performance, and is convenient for operation.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The argon full protection system for the long water inlet of the vanadium smelting crystallizer is characterized by: It includes a long shroud body, an argon blowing pipe connected to the outer periphery of the long shroud body and communicated with the long shroud body, and a lifting assembly for installing the long shroud body on the tundish, the lifting assembly includes a hook connected to the bottom of the tundish, a lower supporting rod connected to the long shroud body, and a lower pressing piece connected to the outer end of the lower supporting rod, one end of the lower supporting rod is provided with a clamping ring sleeved on the long shroud body, the middle part of the lower supporting rod is overlapped on the hook, and the lower supporting rod can swing vertically under the action of the lower pressing piece to drive the long shroud body to press against the bottom of the tundish.

2. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 1 is characterized in that: The long shroud body includes a cylindrical portion and a stepped portion connected to the top of the cylindrical portion, the upper end surface of the stepped portion is provided with a conical hole adapted to the lower slide plate of the tundish, the depth of the conical hole is greater than the height of the inclined surface of the lower slide plate.

3. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 2 is characterized in that: The inverted portion is provided with an argon gas channel connected to the tapered hole, the argon blowing pipe is connected to the argon gas channel, and the tapered hole is provided with a first sealing ring that can be arranged around the outer periphery of the lower slide plate.

4. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 3 is characterized in that: The argon gas channel includes an annular channel arranged on the outer periphery of the inverted portion and a radial channel arranged on the upper end surface of the inverted portion. The annular channel is connected to the tapered hole through the radial channel, and the argon blowing pipe is connected to the annular channel.

5. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 4 is characterized in that: A sealing ring is sleeved on the outer periphery of the inverted portion, and a sealing cover is provided on the upper end of the inverted portion. The sealing cover has an annular retaining portion extending downward along the axial direction of the long water outlet body and sleeved on the outer periphery of the sealing ring. The inner wall of the annular retaining portion, the outer wall of the inverted portion and the upper end surface of the sealing ring enclose the annular channel.

6. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 5 is characterized in that: The radial channel includes a plurality of grooves extending in the radial direction of the shroud body, the grooves are arranged at intervals along the circumference of the inverted portion, and the grooves are respectively communicated with the tapered hole and the annular channel.

7. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 1 is characterized in that: The hanging assembly also includes an articulated seat connected to the argon main pipeline, and the upper end of the hanging hook is hinged to the articulated seat through an articulated shaft.

8. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 2 is characterized in that: The clamping ring comprises a fixed half ring, a movable half ring and a fastener for connecting the fixed half ring and the movable half ring. The fixed half ring and the movable half ring are respectively clamped on the outer circumference of the cylindrical part.

9. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 1, characterized in that: The pressing member includes a counterweight block and a hook connected to the counterweight block, the hook is hooked on the lower supporting rod, the outer periphery of the lower supporting rod is connected with a stop column extending upward, and the stop column is used to limit the pressing member.

10. The argon full protection system for the long water nozzle of the vanadium-preserving smelting crystallizer according to claim 2, characterized in that: A second sealing ring is sleeved on the outer periphery of the cylindrical portion, and the second sealing ring is made of fiber paper.

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