CN214361506U - Argon blowing device for steel tapping hole - Google Patents

Abstract

The utility model relates to an argon blowing device of a steel tapping hole, which comprises a sliding plate component connected with an inner nozzle brick; the annular pipe is sleeved on the steel tapping hole pipe brick; a vent pipe in communication with the annular pipe; the argon channel assembly is arranged on the sliding plate component and is communicated with the annular pipe; the vent pipe is positioned outside the steel tapping hole pipe brick. The application provides a tap hole blows argon device can shorten the distance between argon gas and the molten steel, and argon gas can aim at the molten steel and blow argon, promotes the molten steel quality, realizes few sediment or no sediment tapping.

Description

Argon blowing device for steel tapping hole

Technical Field

The utility model belongs to the technical field of steelmaking, in particular to an argon blowing device for a steel tapping hole.

Background

Steelmaking refers to controlling the carbon content (generally less than 2%), eliminating P, S, O, N and other harmful elements, retaining or increasing Si, Mn, Ni, Cr and other beneficial elements and adjusting the proportion among the elements to obtain the best performance.

The whole steel-making process includes melting, oxidizing, deoxidizing, desulfurizing, tapping, refining outside furnace and casting. Molten steel smelted from a steelmaking furnace contains a small amount of gas and impurities, and generally, the molten steel is poured into a refining ladle and subjected to argon blowing, degassing, ladle refining and other processes to obtain relatively blown steel.

In the converter steelmaking process, molten steel in a converter enters a ladle from a steel outlet assembly, in order to realize slag blocking, a converter sliding plate slag blocking technology is generally adopted, specifically, a slag blocking sliding plate is arranged at an outlet of the steel outlet assembly, the steel outlet assembly comprises a steel outlet head brick, a steel outlet pipe brick, an inner nozzle brick and a fixed steel pipe frame, the slag blocking sliding plate is connected with the inner nozzle brick, and the inner nozzle brick, the steel outlet head brick and the steel outlet pipe brick are sequentially connected.

The argon blowing treatment of the molten steel is a simple refining method for degassing the molten steel and removing non-metallic inclusions, argon blowing turbulence is carried out at the front end in a converter steel outlet, but in the argon blowing mode in the prior art, a certain distance exists between argon and the molten steel, the argon cannot be aligned with the molten steel, the quality of the molten steel is poor, and steel slag flows out.

SUMMERY OF THE UTILITY MODEL

The technical problem of be solved, the utility model aims to provide a tap hole blows argon device can shorten the distance between argon gas and the molten steel, and argon gas can aim at the molten steel and blow argon, promotes the molten steel quality, realizes few sediment or no sediment tapping.

The technical scheme of the utility model as follows:

a tapping hole argon blowing device comprises a sliding plate component connected with an inner nozzle brick;

the annular pipe is sleeved on the steel tapping hole pipe brick;

a vent pipe in communication with the annular pipe;

the argon channel assembly is arranged on the sliding plate component and is communicated with the annular pipe;

the vent pipe is positioned outside the steel tapping hole pipe brick.

Preferably, at least two vent pipes are uniformly distributed on the annular pipe.

Preferably, the vent pipe is arranged in a U-shaped groove on the outer wall of the steel tapping hole pipe brick.

Preferably, the end part of the vent pipe is provided with a sealing cover which is sleeved on the steel tapping hole pipe brick and is detachably connected with the vent pipe.

Preferably, the outer side of the vent pipe is provided with a hoop for fixing the vent pipe.

Preferably, the sliding plate assembly comprises a base plate and a connecting plate 9 arranged on the base plate;

the argon channel assembly comprises a first vent channel arranged on the connecting plate;

and the second air channel pipe is connected with the first air channel, and sequentially penetrates through the connecting plate and the foundation plate and is communicated with the annular pipe.

Preferably, the second airway comprises a first airway segment connected to the first airway;

and the second gas section is connected with the first gas section, the other end of the second gas section is connected with the annular pipe, and the second gas section and the first gas section form an included angle.

Preferably, the inner nozzle rotating sleeve is provided with a central sleeve, and the first gas section is arranged in the central sleeve.

The utility model provides a pair of tap hole argon blowing device, include the slide subassembly of being connected with interior mouth of a river brick, the annular duct of tap hole tubular brick is located to the cover, with the breather pipe of annular duct intercommunication is located argon gas passageway assembly on the slide subassembly, argon gas passageway assembly with the annular duct intercommunication, the breather pipe is located the tap hole tubular brick outside. Compared with the prior art, the tapping hole argon blowing device provided by the application has the advantages that one end of the argon channel assembly is communicated with the external argon source and flows into the annular pipe, the argon is distributed to the vent pipe through the annular pipe, the vent pipe is located on the outer side of a tubular brick of the tapping hole, so that the front end in the converter tapping hole furnace can be blown with argon to disturb, the distance between the argon and the molten steel is shortened, the argon can be aligned to the molten steel, the quality of the molten steel is finally improved, and less slag or no slag tapping is realized.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of an argon blowing apparatus for a tap hole in the present embodiment;

FIG. 2 is a partially enlarged schematic view of an argon blowing device at a tap hole in the present embodiment;

fig. 3 is a schematic view of a connection structure of the second air duct pipe, the annular pipe and the vent pipe in this embodiment.

Reference numbers in the drawings illustrate: 1. an inner nozzle brick; 2. tapping hole tubular bricks; 3. an annular tube; 4. a breather pipe; 5. a U-shaped groove; 6. sealing the cover; 7. hooping; 8. a foundation plate; 9. a connecting plate; 10. a first air duct; 11. a second airway tube; 110. a first gas section; 111. a second gas section; 12. a central sleeve.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.

Please show as fig. 1 to fig. 3, the utility model provides a tap hole argon blowing device, including the slide subassembly of being connected with interior nozzle brick 1, the annular tube 3 of nozzle brick 2 is located to the cover, with breather pipe 4 of annular tube 3 intercommunication locates argon gas passageway assembly on the slide subassembly, argon gas passageway assembly with annular tube 3 intercommunication, breather pipe 4 is located the nozzle brick 2 outside. Compared with the prior art, the argon blowing device for the steel-tapping hole, provided by the application, one end of the argon channel assembly is communicated with an external argon source and flows into the annular pipe 3, the argon is distributed to the vent pipe 4 through the annular pipe 3, the vent pipe 4 is positioned on the outer side of the steel-tapping hole pipe brick 2, so that the argon can be used for blowing argon for disturbing flow at the inner front end of the converter steel-tapping hole furnace, the distance between the argon and the molten steel is shortened, the argon can be aligned to the molten steel, the quality of the molten steel is finally improved, and less slag or no slag tapping is realized.

At least two vent pipes 4 are uniformly distributed on the annular pipe 3, preferably, 12 vent pipes 4 can be selected, the specific arrangement quantity can be selected according to actual conditions, the connection of the vent pipes 4, the annular pipe 3 and the argon channel assembly can carry out argon blowing turbulence at the front end in the converter steel tapping hole furnace, and meanwhile, the distance between argon and molten steel is shortened, and the quality of the molten steel can be improved; on the other hand, the plurality of vent pipes 4 are arranged, so that the volume of the blown argon is the largest under the same argon blowing condition in unit time, the argon blowing turbulence speed can be increased, the molten steel quality is improved again, and less slag or no slag tapping is realized.

Furthermore, the vent pipe 4 is arranged in a U-shaped groove 5 on the outer wall of the steel tapping hole pipe brick 2. So that the vent pipe 4 is arranged in the U-shaped groove 5 to avoid the damage of the vent pipe 4.

The utility model provides an in the embodiment, the tip of breather pipe 4 is equipped with closing cap 6, 6 covers of closing cap establish with the tapping hole tubular brick 2 on, and can dismantle with breather pipe 4 and be connected. The sealing cover 6 is arranged, so that the blockage of the ventilating pipe 4 caused by the entry of refractory materials during grouting can be avoided, and after the grouting is finished, the sealing cover 6 is detached, and the argon blowing can be normally carried out.

Wherein, the outside of breather pipe 4 is equipped with staple bolt 7 that is used for fixed breather pipe 4. The moving of breather pipe 4 can be avoided in the setting of staple bolt 7 for breather pipe 4 reduces the damage of breather pipe 4 in U type groove 5.

Preferably, the slide subassembly includes foundatin plate 8 and locates connecting plate 9 on foundatin plate 8, and argon gas passageway assembly is including locating first air flue 10 on connecting plate 9 to and the second air flue pipe 11 of being connected with first air flue 10, and second air flue pipe 11 passes connecting plate 9 and foundatin plate 8 in proper order, communicates with annular pipe 3. The structure can protect the argon channel and prolong the service life of the argon blowing device at the steel tapping hole.

Further, the second air duct comprises a first air segment 110 connected with the first air duct 10, and a second air segment 111 connected with the first air segment 110, wherein the other end of the second air segment 111 is connected with the annular tube 3, and the second air segment 111 forms an included angle with the first air segment 110. Wherein, pressure 0.6Mpa is preferably selected for use to argon gas, and flow 0.8 ~ 1.2m3/min passes through the first gas section 110 of vertical setting at argon gas, and the second gas section 111 that the rethread slope set up for during the argon gas is inclination and pours into annular pipe 3, can make the argon gas flow to each breather pipe 4 more fast in, improved and blown argon vortex rate, improve and blow argon efficiency.

The utility model provides an in the embodiment, interior mouth of a river changes the overcoat and is equipped with center sleeve 12, and first gas section 110 is located in the center sleeve 12. The central sleeve 12 is a thicker detachable steel sleeve, the lower end of the central sleeve is flush with the lower part of the foundation plate 8, and the upper part of the central sleeve is flush with the surface of the connecting plate 9. Considering the requirement of replacing the refractory material of the inner nozzle brick 1 and the requirement of heat insulation, a certain wall thickness isolation is reserved on the side of the central sleeve 12 close to the central refractory material, thus improving the practicability of the argon blowing device at the steel tapping hole.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A tapping hole argon blowing device is characterized by comprising a sliding plate component connected with an inner nozzle brick (1);

an annular pipe (3) sleeved on the steel tapping hole pipe brick (2);

a vent pipe (4) communicated with the annular pipe (3);

the argon channel assembly is arranged on the sliding plate component and is communicated with the annular pipe (3);

the vent pipe (4) is positioned outside the steel tapping hole pipe brick (2).

2. The argon blowing device at the tap hole of claim 1, characterized in that at least two vent pipes (4) are uniformly distributed on the annular pipe (3).

3. Tap hole argon blowing device according to claim 2, characterized in that the vent pipe (4) is placed in a U-shaped groove (5) on the outer wall of the tap hole brick (2).

4. The tap hole argon blowing device according to claim 3, characterized in that the end of the vent pipe (4) is provided with a cover (6), and the cover (6) is sleeved on the tap hole pipe brick (2) and is detachably connected with the vent pipe (4).

5. The tap hole argon blowing device according to claim 3, characterized in that the outer side of the breather pipe (4) is provided with a hoop (7) for fixing the breather pipe (4).

6. The tap hole argon blowing device according to claim 1, characterized in that said sliding plate assembly comprises a base plate (8) and a connecting plate (9) provided on said base plate (8);

the argon channel assembly comprises a first air channel (10) arranged on the connecting plate (9);

and with second air duct pipe (11) that first air duct (10) are connected, second air duct pipe (11) pass in proper order connecting plate (9) with foundatin plate (8), with annular pipe (3) intercommunication.

7. Tap hole argon blowing device according to claim 6, characterized in that said second gas duct comprises a first gas section (110) connected to said first gas duct (10);

and the second gas section (111) is connected with the first gas section (110), the other end of the second gas section (111) is connected with the annular pipe (3), and an included angle is formed between the second gas section (111) and the first gas section (110).

8. Tap hole argon blowing device according to claim 7, characterized in that said inner nozzle jacket is provided with a central jacket (12), said first gas section (110) being provided inside said central jacket (12).

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