Steel ladle nozzle with composite structure

Abstract

The utility model relates to the technical field of steel ladle nozzles, in particular to a steel ladle nozzle with a composite structure, which comprises a nozzle body and a long nozzle, and is characterized in that the nozzle body comprises an upper section and a lower section, the upper section is cylindrical, the lower section is hemispherical, the upper section and the lower section form a whole, and a liquid outlet is formed in the middle of the nozzle body; a pouring opening is formed in the long nozzle and comprises a connector section and an extending section, the connector section is in an arc shape matched with the radius of the lower section, and the extending section is located below the connector section. The pouring gate can be in contact with the surface of the pouring gate no matter when the inclination degree of inclined pouring is small or vertical pouring is performed, so that a contact gap is small, and secondary oxidation of molten steel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ladle nozzles, in particular to a ladle nozzle with a composite structure. Background Art

[0002] In the steelmaking process, the ladle is mainly used to hold and transport molten steel. In addition, the molten steel must be subjected to argon blowing, LF, RH and other refining treatment processes in the ladle. During the pouring process, the molten steel flows from the ladle nozzle through the ladle protection sleeve and then enters the tundish. Before pouring, the ladle nozzle is filled with drainage sand. Affected by the temperature of the molten steel, the drainage sand forms a liquid layer, a sintered layer and a loose layer structure from top to bottom. When pouring, it is necessary to open the slide under the nozzle. At this time, the loose layer drainage sand flows out of the ladle nozzle under the action of its own gravity, and the sintered layer cannot withstand the static pressure of the molten steel. The molten steel will flow along the ladle nozzle into the tundish, forming the automatic pouring of the ladle, and then the ladle protection sleeve is put on to prevent the steel flow from oxidation.

[0003] Chinese patent CN209986225U discloses a composite ladle nozzle for ladle sliding mechanism, belonging to the technical field of carbon-containing refractory material application, which changes the integral nozzle into a composite nozzle through structural composite; the composite ladle nozzle includes a nozzle body, which is a tubular body, and its interior includes an upper funnel mouth, a middle connecting pipe and a lower trapezoidal expansion mouth, and an inlay groove is provided in the middle of the outer edge of the nozzle body. It not only has the excellent performance of the integral nozzle, but also reduces the production cost and improves the product cost performance while ensuring the service life of the nozzle.

[0004] At present, there are three main contact modes between the ladle nozzle and the shroud: one is line contact sealing, the other is inclined contact sealing, and the third is plane contact. The resulting problem is that when the shroud has a certain inclination during the pouring process, a large gap will be generated on one side of the contact surface between the shroud and the ladle nozzle, resulting in poor sealing effect on the contact surface, which in turn leads to poor effect in preventing secondary oxidation of molten steel. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a composite structure ladle nozzle.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A composite structure ladle nozzle, comprising a nozzle body and a long nozzle, characterized in that the nozzle body comprises an upper section and a lower section, the upper section is cylindrical, the lower section is hemispherical, the upper section and the lower section form an integral body, and a liquid outlet is opened in the middle of the nozzle body;

[0008] A pouring port is provided in the long shroud, and the pouring port comprises an interface section and an extension section. The interface section is an arc-shaped section matching the radius of the lower section, and the extension section is located below the interface section.

[0009] Preferably, a sealing sleeve is provided inside the pouring port and the sealing sleeve fits the pouring port.

[0010] Preferably, the shape of the sealing sleeve includes a top edge and a lower portion, the top edge is in contact with the surface of the long shroud, and the lower portion is in contact with the extension section and the interface section.

[0011] Preferably, an outer wall of the long water nozzle is provided with an inlay groove, and an inlay layer is inlaid in the inlay groove.

[0012] Preferably, a ventilation component is provided on the long shroud, and the ventilation component is used to fill inert gas into the long shroud.

[0013] Preferably, the ventilation assembly includes an air flow channel and an air inlet pipe, the air flow channel is opened on the long water outlet and is located at the middle height of the casting mouth, the air flow channel is an annular channel, the air inlet pipe is fixedly installed on the long water hole and is connected to the air flow channel, and a ventilation branch pipe is opened on the air flow channel, and several of the ventilation branch pipes are connected to the interface section in an annular manner with equal distances.

[0014] In the utility model, when pouring, the lower section of the hemisphere is against the interface section, because both are spherical surfaces, they can contact the surface of the pouring port regardless of the inclined pouring with a small inclination or vertical pouring, thereby making the contact gap smaller and reducing the secondary oxidation of molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a composite structure ladle nozzle proposed by the utility model;

[0016] Figure 2 This is a cross-sectional view of the ventilation component structure of a composite structure ladle nozzle proposed by the utility model;

[0017] Figure 3 The utility model provides a structural cross-sectional view of a composite structure ladle nozzle.

[0018] In the figure: 1 nozzle body, 11 upper section, 12 lower section, 2 long nozzle, 3 casting port, 31 interface section, 32 extension section, 4 inlay layer, 5 ventilation component, 51 air flow channel, 52 air inlet pipe, 53 ventilation branch pipe, 6 sealing sleeve, 61 top edge, 62 bottom part. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 3 A composite structure ladle nozzle comprises a nozzle body 1 and a long nozzle 2, the nozzle body 1 comprises an upper section 11 and a lower section 12, the upper section 11 is cylindrical, the lower section 12 is a hemispherical body, the upper section 11 and the lower section 12 form an integral body, and a liquid outlet is opened in the middle of the nozzle body 1;

[0021] A pouring port 3 is provided in the long shroud 2 . The pouring port 3 comprises an interface section 31 and an extension section 32 . The interface section 31 is an arc-shaped arc that matches the radius of the lower section 12 . The extension section 32 is located below the interface section 31 .

[0022] A sealing sleeve 6 is provided in the pouring port 3, and the sealing sleeve 6 fits the pouring port 3. The sealing sleeve 6 also has a certain sealing effect, which helps to reduce the gap between the interface section 31 and the lower section 12;

[0023] The shape of the sealing sleeve 6 includes a top edge 61 and a bottom portion 62. The top edge 61 is in contact with the surface of the long shroud 2, and the bottom portion 62 is in contact with the extension section 32 and the interface section 31. The top edge 61 ensures that the sealing sleeve 6 is not easily moved after argon gas is introduced into the interface section 31.

[0024] The outer wall of the long shroud 2 is provided with an inlay groove, in which an inlay layer 4 is inlaid. The inlay layer 4 and the long shroud 2 are made of different materials. The composite structure can reduce product costs.

[0025] A vent assembly 5 is provided on the long shroud 2, and the vent assembly 5 is used to fill the long shroud 2 with inert gas. By introducing argon gas into the long shroud 2 through the vent assembly 5, the sealing performance can be further improved;

[0026] The ventilation assembly 5 includes an air flow channel 51 and an air inlet pipe 52. The air flow channel 51 is opened on the long water hole 2 and is located at the middle height of the pouring mouth 3. The air flow channel 51 is an annular channel. The air inlet pipe 52 is fixedly installed on the long water hole and is connected to the air flow channel 51. A ventilation branch pipe 53 is opened on the air flow channel 51. Several ventilation branch pipes 53 are connected to the interface section 31 in an annular manner with equal distances. Argon gas passes through the air flow channel 51 to the back of the sealing sleeve 6, so that the sealing sleeve 6 is in contact with the lower section 12 during the pouring process. The air inlet pipe 52 is provided with a control valve to control the gas. The ventilation branch pipe 53 allows the argon gas to generate pressure on the sealing sleeve 6 from multiple sides to improve the sealing effect.

[0027] In the utility model, when pouring, when the lower section 12 of the hemisphere abuts against the interface section 31, since both are spherical surfaces, they can contact the surface of the pouring port 3 regardless of whether the inclination is small during inclined pouring or vertical pouring, thereby making the contact gap smaller and reducing the secondary oxidation of molten steel.

[0028] In general, regarding the technical problem: At present, there are three main contact modes between the ladle nozzle and the long nozzle 2: one is line contact sealing, the second is inclined contact sealing, and the third is plane contact. The resulting problem is: when the long nozzle 2 has a certain amount of inclination during the pouring process, a large gap will be generated on one side of the contact surface between the long nozzle 2 and the ladle nozzle, resulting in poor sealing effect of the contact surface, thereby resulting in poor effect in preventing secondary oxidation of molten steel; adopting a technical solution: adjusting the lower end of the nozzle body and the pouring port in the long nozzle; because the implementation process of the technical solution is: when pouring, the lower section 12 of the hemisphere is against the interface section 31, because they are all spherical surfaces, no matter when the inclination of the inclined pouring is small or when pouring vertically, it can contact the surface of the pouring port 3; this will inevitably solve the technical problem, and the technical effect achieved is: the contact gap is small, reducing the secondary oxidation of molten steel.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite structure ladle nozzle, comprising a nozzle body (1) and a long nozzle (2), characterized in that: The nozzle body (1) comprises an upper section (11) and a lower section (12); the upper section (11) is cylindrical, the lower section (12) is hemispherical, the upper section (11) and the lower section (12) form an integral body, and a liquid outlet is provided in the middle of the nozzle body (1); A pouring port (3) is provided in the long shroud (2), the pouring port (3) comprising an interface section (31) and an extension section (32), the interface section (31) being an arc-shaped section matching the radius of the lower section (12), and the extension section (32) being located below the interface section (31).

2. The composite structure ladle nozzle according to claim 1, characterized in that: A sealing sleeve (6) is provided in the pouring opening (3) and is attached to the pouring opening (3). The sealing sleeve (6) is in close contact with the pouring opening (3).

3. The composite structure ladle nozzle according to claim 2, characterized in that: The shape of the sealing sleeve (6) comprises a top edge (61) and a bottom portion (62), wherein the top edge (61) is in contact with the surface of the long shroud (2), and the bottom portion (62) is in contact with the extension section (32) and the interface section (31).

4. The composite structure ladle nozzle according to claim 1, characterized in that: An inlay groove is provided on the outer wall of the long water outlet (2), and an inlay layer (4) is inlaid in the inlay groove.

5. The composite structure ladle nozzle according to claim 1, characterized in that: The long shroud (2) is provided with a ventilation component (5), and the ventilation component (5) is used to fill the long shroud (2) with inert gas.

6. The composite structure ladle nozzle according to claim 5, characterized in that: The ventilation assembly (5) comprises an air flow channel (51) and an air inlet pipe (52). The air flow channel (51) is provided on the long water hole (2) and is located at the middle height of the pouring hole (3). The air flow channel (51) is an annular channel. The air inlet pipe (52) is fixedly mounted on the long water hole and communicates with the air flow channel (51). A ventilation branch pipe (53) is provided on the air flow channel (51). A plurality of the ventilation branch pipes (53) are annularly equidistantly communicated with the interface section (31).

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