CN212669728U

CN212669728U - Treatment device for coal gas channeling of blast furnace taphole

Info

Publication number: CN212669728U
Application number: CN202021824371.9U
Authority: CN
Inventors: 耿敬涛; 杨占海; 高远; 王志强; 邵久刚
Original assignee: Handan Iron and Steel Group Co Ltd; HBIS Co Ltd Handan Branch
Current assignee: Handan Iron and Steel Group Co Ltd; HBIS Group Hansteel Co; HBIS Co Ltd Handan Branch
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-03-09
Anticipated expiration: 2030-08-27

Abstract

The utility model relates to a control device of coal gas is scurried to blast furnace taphole belongs to metallurgical industry blast furnace ironmaking production technical field. The technical scheme is as follows: a protection plate (5) is arranged at the iron notch of the blast furnace, an elliptical hole (11) is formed in the protection plate (5), and the embedded support (4) is fixed on the protection plate (5); the gas collecting pipe (2) is fixed at the upper half part of the elliptical hole (11), a through long notch (12) is arranged on the pipe wall of the gas collecting pipe (2), two ends of the gas collecting pipe (2) are respectively connected with a gas leading-out pipe (1), and the gas leading-out pipe (1) is fixed on the protective plate (5) in a vertical state; the mud sleeve (8) is poured on the protective plate (5) through pouring materials. The utility model has the advantages that: the coal gas which can be prevented from escaping from the high-pressure taphole area reduces the strength of the mud sleeve, prolongs the service life of the mud sleeve, simultaneously lightens the taphole splashing, and improves the tapping safety of the blast furnace.

Description

Treatment device for coal gas channeling of blast furnace taphole

Technical Field

The utility model relates to a control device of coal gas is scurried to blast furnace taphole belongs to metallurgical industry blast furnace ironmaking production technical field.

Background

The blast furnace is opened after overhaul, coal gas channeling phenomenon generally exists in an iron notch area, and the safe and ordered production of the blast furnace is influenced under severe conditions. Firstly, after the taphole is opened, molten iron is splashed during tapping due to the fact that high-pressure coal gas escapes from the taphole, and then condensed slag iron hard shells are formed on two sides of a main iron runner, so that the labor intensity of workers is increased, and even serious accidents such as the taphole being not plugged, mud guns being burned, the taphole being plugged during damping down and the like are caused; secondly, the strength of the taphole mud sleeve is reduced due to the high-pressure gas channeling, particularly when a new mud sleeve is manufactured, the internal structure of the mud sleeve at the position where the gas channeling occurs is soft or generates a material-free area, the overall strength of the mud sleeve is deteriorated, the mud sleeve has cracks, the thickness of the mud sleeve is rapidly thinned in a short time along with the erosion and corrosion of iron slag in the normal use process, the mud beating pressure is increased when the taphole is plugged by wind, the mud sleeve is easily propped up, and the taphole bleeds mud, so that the safe and stable production of a blast furnace is seriously threatened; thirdly, the blast furnace gas flows over the platform of the cast house, so that the gas poisoning accident of the workers on the platform of the cast house is easy to happen.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a treatment device of coal gas is scurried to blast furnace taphole can avoid reducing mud cover intensity from the regional coal gas of scurring of high pressure taphole, prolongs the life of mud cover, has also alleviateed the taphole splash simultaneously, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

a treatment device for blast furnace taphole coal gas comprises a coal gas leading-out pipe, a coal gas collecting pipe, an anchoring hook, a pre-embedded support, a protection plate, a taphole pore passage, a mud sleeve, an elliptical hole and a notch, wherein the protection plate is arranged at the taphole of the blast furnace, the protection plate is provided with the elliptical hole concentric with the taphole pore passage, the pre-embedded support is fixed on the protection plate, and the anchoring hook is arranged on the pre-embedded support; the gas collecting pipe is arc-shaped, the radian of the gas collecting pipe is matched with the upper half part of the elliptical hole, the gas collecting pipe is fixed on the upper half part of the elliptical hole, a through-long notch is formed in the pipe wall of the gas collecting pipe, two ends of the gas collecting pipe are respectively connected with a gas outlet pipe, and the gas outlet pipe is fixed on the protective plate in a vertical state; and pouring a mud sleeve on the protective plate by using a pouring material.

The embedded support is a net-shaped structure welded by deformed steel bars.

The embedded supports are fixed on the protection plates on two sides and above the elliptical hole.

The major axis of the elliptical hole which is concentric with the iron notch pore passage on the protection plate is in the vertical direction, and the minor axis is in the horizontal direction.

The protective plate is fixed on the blast furnace shell.

By adopting the utility model, after the coal gas which is blown out from the iron notch area of the blast furnace enters the coal gas collecting pipe, the coal gas is guided to the outside of the iron notch area through the coal gas guiding-out pipe which is connected with the two ends of the coal gas collecting pipe and is ignited.

The utility model has the advantages that: the coal gas that can avoid scurrying from the high pressure taphole region reduces mud cover intensity and emits mud when the sprue that leads to, prolongs the life of mud cover, has also alleviateed the taphole splash simultaneously, has improved the security of blast furnace tapping.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a front view of the gas delivery pipe and the gas collection pipe;

FIG. 4 is a side view of the connection of the gas delivery line and the gas collection pipe;

in the figure: the gas guide pipe comprises a gas guide pipe 1, a gas collecting pipe 2, an anchoring hook 3, a pre-buried support 4, a protective plate 5, an iron notch pore passage 6, a mud sleeve surface 7, a mud sleeve 8, a furnace shell 9, a cooling wall 10, an elliptical hole 11 and a notch 12.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

Referring to the attached drawings 1-4, the device for treating the coal gas channeling from the iron notch of the blast furnace comprises a coal gas leading-out pipe 1, a coal gas collecting pipe 2, anchoring hooks 3, a pre-embedded support 4, a protection plate 5, an iron notch pore passage 6, a mud sleeve 8, an elliptical hole 11 and a notch 12, wherein the protection plate 5 is arranged at the iron notch of the blast furnace, the elliptical hole 11 concentric with the iron notch pore passage 6 is arranged on the protection plate 5, the pre-embedded support 4 is fixed on the protection plate 5, and the anchoring hooks 3 are arranged on the pre-embedded support 4; the gas collecting pipe 2 is arc-shaped, the radian of the gas collecting pipe 2 is matched with the upper half part of the elliptical hole 11, the gas collecting pipe 2 is fixed on the upper half part of the elliptical hole 11, a through long notch 12 is arranged on the pipe wall of the gas collecting pipe 2, two ends of the gas collecting pipe 2 are respectively connected with a gas leading-out pipe 1, and the gas leading-out pipe 1 is fixed on the protective plate 5 in a vertical state; the protective plate 5 is provided with a casting material for casting the mud cover 8.

In this embodiment, referring to fig. 1-4, the specific operation process is as follows:

1) stopping tapping in a tapping field of a coal gas channeling taphole, using an air pick to knock off old mud jacking, leaking out the taphole protection plate 5, and cleaning materials on the taphole protection plate 5;

2) the middle of the protection plate 5 is provided with an elliptical hole 11 in the vertical direction, a gas collecting pipe 2 is integrally welded at the upper part of the elliptical hole 11 in the middle of the protection plate 5, the gas collecting pipe 2 is a steel pipe with the diameter of 40mm and the wall thickness of 3mm, and a notch 12 with the width of 10mm is formed in the length direction of the steel pipe;

two ends of a gas collecting pipe 2 are respectively connected with a vertical gas leading-out pipe 1, the gas leading-out pipe 1 is a steel pipe with the diameter of ∅ mm and the wall thickness of 3mm, the height of the gas leading-out pipe 1 is 900mm, the height of the gas leading-out pipe 1 exceeds the upper part of an iron notch protection plate by 100mm, and the gas leading-out pipe 1 and the protection plate are welded into a whole, so that the leaked gas enters the gas leading-out pipe 1 through the gas collecting pipe 2, and the gas is prevented from directly contacting with a mud sleeve 8;

3) welding embedded supports 4 on the upper half part of the taphole protection plate 5, namely two sides and above the elliptical hole 11, wherein the embedded supports 4 are in a net structure welded by deformed steel with the diameter of ∅ being 12mm, and the anchoring hooks 3 are welded on the embedded supports 4, so that the strength of the mud sleeve is increased, and the gas delivery pipe 1 is positioned in the net embedded supports 4 and clings to the taphole protection plate 5;

4) pouring a mud sleeve 8 on the outer side of the taphole protection plate 5 by using a mud sleeve pouring material, wherein the pouring material is Al₂O₃The material of-C-SiC is uniformly mixed by adding water by a mixer, the water adding proportion is 3.5-5%, the fluidity of the mixed casting material is required to be 150-180mm, the high viscosity and the short solidification time of the used casting material are ensured, the solidification time is generally required to be less than or equal to 40min, the casting mud sleeve 8 seals the coal gas, and the direct contact and the scouring of the mud sleeve 8 are reduced;

5) when the mud cover 8 is poured, the thickness of the mud cover can be properly increased so as to prolong the service life of the mud cover 8;

6) and after the mud sleeve 8 is poured, manufacturing a mud sleeve surface 7 according to the position where the gun cap is contacted with the mud sleeve 8 when the mud gun is plugged.

After entering the gas collecting pipe 2, the gas from the blast furnace taphole area is guided to the outside of the taphole area through the gas guide pipe 1 connected with the gas collecting pipe 2 in two phases and is ignited.

Claims

1. The utility model provides a treatment device of coal gas is scurried at blast furnace taphole which characterized in that: the coal gas recovery device comprises a coal gas delivery pipe (1), a coal gas collecting pipe (2), an anchoring hook (3), an embedded support (4), a protective plate (5), an iron notch pore passage (6), a mud sleeve (8), an elliptical hole (11) and a notch (12), wherein the protective plate (5) is arranged at an iron notch of the blast furnace, the elliptical hole (11) concentric with the iron notch pore passage (6) is arranged on the protective plate (5), the embedded support (4) is fixed on the protective plate (5), and the anchoring hook (3) is arranged on the embedded support (4); the gas collecting pipe (2) is arc-shaped, the radian of the gas collecting pipe (2) is matched with the upper half part of the elliptical hole (11), the gas collecting pipe (2) is fixed on the upper half part of the elliptical hole (11), a through-long notch (12) is formed in the pipe wall of the gas collecting pipe (2), two ends of the gas collecting pipe (2) are respectively connected with a gas leading-out pipe (1), and the gas leading-out pipe (1) is fixed on the protective plate (5) in a vertical state; the protective plate (5) is cast with a casting material to form a mud sleeve (8).

2. The device for treating the blast furnace taphole blowby gas according to claim 1, characterized in that: the embedded support (4) is of a net structure welded by deformed steel bars.

3. The device for treating blast furnace taphole blowby gas according to claim 1 or 2, characterized in that: the embedded support (4) is fixed on the protection plates (5) on the two sides and above the elliptical hole (11).

4. The device for treating the blast furnace taphole blowby gas according to claim 1, characterized in that: the major axis of the elliptical hole (11) which is concentric with the taphole hole (6) on the protective plate (5) is vertical, and the minor axis is horizontal.

5. The device for treating the blast furnace taphole blowby gas according to claim 1, characterized in that: the protective plate (5) is fixed on a blast furnace shell (9).