CN220717772U

CN220717772U - Liquid seal type full-closed protective casting nozzle

Info

Publication number: CN220717772U
Application number: CN202322295184.6U
Authority: CN
Inventors: 杨海滨; 郭全真; 宋依新; 李欣; 李德辉
Original assignee: Handan Iron and Steel Group Co Ltd; HBIS Co Ltd Handan Branch
Current assignee: Handan Iron and Steel Group Co Ltd; HBIS Co Ltd Handan Branch
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-04-05
Anticipated expiration: 2033-08-25

Abstract

The utility model relates to a liquid seal type full-closed protective casting nozzle, belonging to the technical field of continuous casting production in the metallurgical industry. The technical proposal is as follows: the device comprises a ladle drain port (1), a sealing barrel (2), a ladle long water port (3), an argon interface (5) and a solution barrel (6), wherein the solution barrel (6) is fixed on the ladle long water port (3), an opening of the solution barrel (6) faces upwards, and the argon interface (5) is arranged on the ladle long water port (3) which is close to the barrel bottom of the solution barrel (6); the sealing barrel (2) is fixed on the ladle drain opening (1), and the opening of the sealing barrel (2) faces downwards; the ladle drain (1) and the ladle long nozzle (3) are combined together, so that the sealing barrel (2) fixed on the ladle drain (1) is inserted into the solution barrel (6) fixed on the ladle long nozzle (3). The beneficial effects of the utility model are as follows: the air entrainment at the joint of the ladle long nozzle and the drain nozzle can be thoroughly stopped, the contact of molten steel and air is stopped, and the fully-closed protection casting technology is realized.

Description

Liquid seal type full-closed protective casting nozzle

Technical Field

The utility model relates to a liquid seal type full-closed protective casting nozzle, belonging to the technical field of continuous casting production in the metallurgical industry.

Background

With the rapid development of metallurgical technology and the further improvement of the cleanliness and quality requirements of steel by users, in recent years, a plurality of technical measures are adopted for improving the quality of continuous casting billets. In the aspect of continuous casting, the non-oxidizing casting technology is mainly adopted, so that secondary oxidization of molten steel is prevented, inclusions in the steel are reduced, the purity of the molten steel and the quality of casting blanks are improved, and meanwhile, the castability of the molten steel is improved.

In the non-oxidizing pouring technique, the most important link is to protect the molten steel flowing from the ladle into the tundish from contact with air or from contact with the air, thereby preventing the molten steel from being polluted by secondary oxidation. In the process, the sealing pouring is realized mainly by using a long nozzle with argon seal protection, and the sealing structure between the existing ladle drain nozzle and the long nozzle can not completely prevent molten steel from contacting air. In the pouring process, the flow of molten steel from a large ladle to a middle ladle can generate negative pressure at the joint of a long nozzle and a ladle drain nozzle, and a large amount of air is sucked to cause secondary oxidation, so that the quality, the castability and the like of the high-quality steel casting blank are greatly influenced. Therefore, how to eliminate the entrainment of air at the joint of the long nozzle and the ladle drain nozzle in the flowing process of molten steel from the ladle to the tundish and reduce the contact of the molten steel and the air, thereby reducing the secondary oxidation of the molten steel, improving the purity of the molten steel and the castability of the aluminum deoxidized molten steel, and being the technical problem which needs to be solved urgently for the production of high-quality special steel.

Disclosure of Invention

The utility model aims to provide a liquid seal type full-closed protective pouring nozzle, which can thoroughly stop the entrainment of air at the joint of a ladle long nozzle and a drain nozzle, stop the contact of molten steel and air, realize the full-closed protective pouring technology and solve the problems in the background technology.

The technical scheme of the utility model is as follows:

the liquid seal type full-closed protective pouring nozzle comprises a ladle drain nozzle, a sealing barrel, a ladle long nozzle, an argon interface and a solution barrel, wherein the solution barrel is fixed on the ladle long nozzle, an opening of the solution barrel faces upwards, and the ladle long nozzle close to the bottom of the solution barrel is provided with the argon interface; the sealing barrel is fixed on the ladle drain outlet, and the opening of the sealing barrel faces downwards; the ladle drain port and the ladle long port are combined together, so that the sealing barrel fixed on the ladle drain port is inserted into the solution barrel fixed on the ladle long port.

The sealing barrel fixed on the ladle drain port is a barrel with a downward opening, and the solution barrel fixed on the ladle long water port is a barrel with an upward opening.

The diameter of the sealing barrel is smaller than that of the solution barrel.

And glass solution is arranged in the solution barrel.

The liquid level of the glass solution in the solution barrel exceeds the lower opening of the sealing barrel.

The beneficial effects of the utility model are as follows: the utility model utilizes the principle of liquid seal, completely eliminates the contact between the molten steel and air at the joint of the ladle long nozzle and the ladle drain nozzle, and eliminates the oxygenation and nitrogen increase of the molten steel in the link, thereby effectively eliminating the secondary oxidation phenomenon of the joint of the ladle long nozzle and the ladle drain nozzle in the flowing process of molten steel from a large ladle to a middle ladle, and simultaneously increasing the micro-positive pressure protective gas at the joint, thereby being beneficial to the inclusion control and the purity control of the molten steel of high-quality special steel.

Drawings

FIG. 1 is a schematic diagram of the present utility model;

FIG. 2 is a schematic view of a ladle nozzle;

FIG. 3 is a schematic view of a ladle shroud;

in the figure: 1. ladle drain; 2. sealing the barrel; 3. ladle long nozzle; 4. a glass solution; 5. argon interface; 6. a solution barrel; 7. the water outlet protects the iron sheet; 8. the long water gap protects the iron sheet.

Detailed Description

The utility model is further illustrated by way of example with reference to the accompanying drawings.

Referring to fig. 1-3, a liquid seal type full-closed protective pouring nozzle comprises a ladle lower nozzle 1, a sealing barrel 2, a ladle long nozzle 3, an argon gas interface 5 and a solution barrel 6, wherein the solution barrel 6 is fixed on the ladle long nozzle 3, the opening of the solution barrel 6 faces upwards, and the ladle long nozzle 3 close to the barrel bottom of the solution barrel 6 is provided with the argon gas interface 5; the sealing barrel 2 is fixed on the ladle drain port 1, and the opening of the sealing barrel 2 faces downwards; the ladle drain 1 and the ladle long nozzle 3 are combined together, so that the sealing barrel 2 fixed on the ladle drain 1 is inserted into the solution barrel 6 fixed on the ladle long nozzle 3.

In this embodiment, referring to fig. 1 to 3, a ladle drain shown in fig. 2 and a ladle shroud shown in fig. 3 are prepared before production, and a glass solution is heated in advance by a vessel for standby.

As shown in fig. 2 and 3, the sealing barrel 2 and the solution barrel 6 are made of iron plates, and the diameter of the sealing barrel 2 is smaller than that of the solution barrel 6. The sealing barrel 2 is welded on the water outlet protection iron sheet 7, the opening is downward, the solution barrel 6 is welded on the long water outlet protection iron sheet 8, the opening is upward, and the argon gas interface 5 is welded on the long water outlet protection iron sheet 8 close to the barrel bottom of the solution barrel 6.

As shown in figure 1, when the ladle is replaced by continuous casting pouring, argon is opened, so that the ladle long nozzle 3 is kept in an argon blowing state, a manipulator is operated to enable the ladle lower nozzle 1 to be in butt joint with the long nozzle 3, the ladle long nozzle 3 is hung and compacted, glass solution 4 is added into a solution barrel 6 on the ladle long nozzle 3, the liquid level exceeds the lower opening of a sealing barrel 2 fixed on the ladle lower nozzle 1, and a sliding mechanism is opened at the moment, so that full-closed protection pouring can be realized.

Claims

1. A liquid seal type full-closed protection casting nozzle is characterized in that: the device comprises a ladle drain port (1), a sealing barrel (2), a ladle long water port (3), an argon interface (5) and a solution barrel (6), wherein the solution barrel (6) is fixed on the ladle long water port (3), an opening of the solution barrel (6) faces upwards, and the argon interface (5) is arranged on the ladle long water port (3) which is close to the barrel bottom of the solution barrel (6); the sealing barrel (2) is fixed on the ladle drain opening (1), and the opening of the sealing barrel (2) faces downwards; the ladle drain (1) and the ladle long nozzle (3) are combined together, so that the sealing barrel (2) fixed on the ladle drain (1) is inserted into the solution barrel (6) fixed on the ladle long nozzle (3).

2. A liquid-tight fully-closed protective-pouring nozzle according to claim 1, characterized in that: the sealing barrel (2) fixed on the ladle drain port (1) is a barrel with a downward opening, and the solution barrel (6) fixed on the ladle long water port (3) is a barrel with an upward opening.

3. A liquid-tight fully-closed protective-pouring nozzle according to claim 2, characterized in that: the diameter of the sealing barrel (2) is smaller than that of the solution barrel (6).

4. A liquid-tight fully-closed protective-casting nozzle according to claim 3, characterized in that: the solution barrel (6) is internally provided with glass solution (4).

5. The liquid-sealed, fully-closed, protective-poured nozzle of claim 4, wherein: the liquid level of the glass solution (4) in the solution barrel (6) exceeds the lower opening of the sealing barrel (2).