CN114292977A

CN114292977A - Sealing structure and sealing method for preventing gas leakage at bottom of blast furnace

Info

Publication number: CN114292977A
Application number: CN202111649665.1A
Authority: CN
Inventors: 朱德贵
Original assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd
Current assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-08

Abstract

The invention provides a sealing structure and a sealing method for preventing gas leakage at the bottom of a blast furnace. The blast furnace includes a blast furnace foundation and a blast furnace arranged above the blast furnace foundation. The blast furnace has a furnace shell, and the outer bottom of the furnace shell is connected with a first shell. A second shell is connected to the outside of the first shell, and the bottom of the first shell and the bottom of the second shell are both sealed and connected to the blast furnace foundation; the first shell and the second shell are both provided with pouring ports; The blast furnace foundation inside the furnace shell is provided with carbon bricks, the top of the carbon bricks is provided with a support column, the top of the support column is provided with a furnace bottom sealing plate, and the furnace bottom sealing plate is connected with the inner wall of the furnace shell, so A cavity is formed between the furnace bottom sealing plate, the support column, the carbon brick and the furnace shell. The sealing method includes the steps of outer sealing and inner plugging, and through the dual functions of outer sealing and inner plugging, the sealing effect is improved to prevent gas leakage.

Description

Sealing structure and sealing method for preventing gas leakage at bottom of blast furnace

Technical Field

The invention belongs to the technical field of blast furnace repair, and particularly relates to a sealing structure and a sealing method for preventing gas leakage at the bottom of a blast furnace.

Background

Along with the extension of the production time of the blast furnace, the enrichment of harmful elements in the furnace can cause the furnace shell of the blast furnace to rise, so that pressurized gas escapes from the joint part of the furnace foundation sealing plate and the concrete foundation, and the leaked gas gradually expands to the periphery of the furnace foundation along with the extension of the production time, thereby having potential risks. The traditional liberation method is to adopt a grouting method to treat an internal gas channel after finding out leaked gas, can achieve a certain effect within a short time after treatment, but can repeatedly generate leaked gas along with the prolonging of time, thereby causing great hidden troubles to safe production. In order to control the furnace shell from rising and ensure the safe operation of the blast furnace, an effective treatment method is needed to control the gas leakage.

Disclosure of Invention

In order to solve the technical problem of the leakage of the gas at the bottom of the blast furnace, the invention provides a sealing structure and a sealing method for preventing the gas at the bottom of the blast furnace from leaking.

A sealing structure for preventing gas leakage at the bottom of a blast furnace comprises a blast furnace foundation and the blast furnace arranged above the blast furnace foundation, wherein the blast furnace is provided with a furnace shell, the bottom of the outer side of the furnace shell is connected with a first shell, the outer side of the first shell is connected with a second shell, and the bottom of the first shell and the bottom of the second shell are both in sealing connection with the blast furnace foundation; pouring openings are formed in the first shell and the second shell; the blast furnace is characterized in that carbon bricks are arranged on a blast furnace foundation inside the furnace shell, supporting columns are arranged at the tops of the carbon bricks, furnace bottom sealing plates are arranged at the tops of the supporting columns and connected with the inner wall of the furnace shell, and cavities are formed among the furnace bottom sealing plates, the supporting columns, the carbon bricks and the furnace shell.

Furthermore, the bottom of the first shell extends into a groove formed in the blast furnace foundation, and the groove is provided with a plugging block so as to achieve sealing connection.

Further, the block is a concrete block.

The sealing method of the sealing structure for preventing the gas leakage at the bottom of the blast furnace comprises the following steps:

s1, external sealing: pouring materials are added into the first shell and the second shell through pouring openings to form a first outer pouring layer and a second outer pouring layer respectively;

s2, inner blocking: the inner grouting layer is formed by filling the areas among the furnace bottom sealing plate, the support columns, the carbon bricks and the furnace shell with self-flowing materials through punching holes in the furnace bottom sealing plate.

Further, the self-flow material of step S2 is an epoxy resin.

The invention has the beneficial effects that:

the invention provides a sealing structure for preventing gas leakage at the bottom of a furnace, which prevents gas leakage by arranging a first pouring layer outside a furnace shell, and prevents gas from leaking out of a gap of the first pouring layer by arranging a second pouring layer outside the first pouring layer, improves the strength and can effectively avoid gas leakage; in addition, the self-flowing material is introduced into the furnace shell, so that a sealing area is further formed, and the sealing effect is improved.

Drawings

FIG. 1 is a schematic view of a sealing structure for preventing leakage of bottom gas of a blast furnace according to an embodiment.

Description of reference numerals: 1. a furnace shell; 2. a blast furnace foundation; 3. a first outer casting layer; 31. a first housing; 4. A second outer casting layer; 41. a second housing; 5. a plugging block; 6. a furnace bottom closing plate; 7. a support pillar; 8. carbon bricks; 9. pouring a mouth; 10. and pressing the slurry layer.

Detailed Description

The present invention is further described with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the claims, and other alternatives which may occur to those skilled in the art are also within the scope of the claims.

Further, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

A sealing structure for preventing gas leakage at the bottom of a blast furnace is disclosed, as shown in figure 1, the blast furnace comprises a blast furnace foundation 2 and a blast furnace arranged above the blast furnace foundation 2, the blast furnace is provided with a furnace shell 1, the bottom of the outer side of the furnace shell 1 is connected with a first shell 31, the outer side of the first shell 31 is connected with a second shell 41, and the bottom of the first shell 31 and the bottom of the second shell 41 are both connected with the blast furnace foundation 2 in a sealing way; the bottom of first shell 31 stretches into in the recess that blast furnace foundation 2 seted up, the recess is equipped with the shutoff piece 5 of concrete material, and first shell 31 downwardly extending prevents that coal gas from leaking from the bottom gap of first shell 31 in going into blast furnace foundation 2 like this to reach sealing connection, second shell 41 can be connected with blast furnace foundation 2 through bonding mode. Pouring openings 9 are formed in the first shell 31 and the second shell 41, pouring materials can be added into the first shell 31 and the second shell 41 through the pouring openings 9, sealing is achieved after pouring is completed, coal gas in the blast furnace is prevented from leaking out from a gap at the bottom of the blast furnace, and double protection effects are achieved due to the arrangement of the second shell 41. Be equipped with carbon brick 8 on the inside blast furnace foundation 2 of stove outer covering, the top of carbon brick 8 is equipped with support column 7, support column 7 top is equipped with stove bottom shrouding 6, stove bottom shrouding 6 and 1 interior wall connection of stove outer covering, form the cavity between stove bottom shrouding 6, support column 7, carbon brick 8 and the stove outer covering 1, pack the thick liquids in the cavity, the thick liquids of filling also can prevent that coal gas from spilling.

The sealing method of the sealing structure for the leakage of the gas at the bottom of the blast furnace comprises the following steps:

s1, external sealing: pouring materials are added into the first shell 31 and the second shell 41 through the pouring opening 9 to form a first outer pouring layer 3 and a second outer pouring layer 4 respectively as a leakage-proof measure outside the blast furnace shell;

s2, inner blocking: punching a hole on a furnace bottom sealing plate 6, and filling the area among the furnace bottom sealing plate 6, a support pillar 7, a carbon brick 8 and a furnace shell 1 with self-flowing materials to form an inner grouting layer 10, wherein the self-flowing materials are epoxy resin and are used as a leakage prevention measure in the furnace shell of the blast furnace; the gas leakage channel can be fully sealed by combining the external seal and the internal plug, so that the gas leakage is prevented.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A sealing structure for preventing gas leakage at the bottom of a blast furnace, the blast furnace comprising a blast furnace foundation (2) and a blast furnace arranged above the blast furnace foundation (2), the blast furnace having a furnace shell (1), characterized in that the furnace A first casing (31) is connected to the outer bottom of the casing (1), a second casing (41) is connected to the outer side of the first casing (31), and the bottom of the first casing (31) and the second casing (41) The bottom of the furnace is sealed with the blast furnace foundation (2); the first shell (31) and the second shell (41) are both provided with pouring ports (9); the blast furnace foundation (2) inside the furnace shell A carbon brick (8) is provided thereon, a supporting column (7) is provided on the top of the carbon brick (8), and a furnace bottom sealing plate (6) is provided on the top of the supporting column (7), and the furnace bottom sealing plate is (6) Connected to the inner wall of the furnace shell (1), and a cavity is formed between the furnace bottom sealing plate (6), the support column (7), the carbon brick (8) and the furnace shell (1).

2 . The sealing structure for preventing the leakage of blast furnace bottom gas according to claim 1 , wherein the bottom of the first shell ( 31 ) extends into the groove opened in the blast furnace foundation ( 2 ), and the groove A blocking block (5) is provided to achieve a sealed connection.

3 . The sealing structure for preventing the leakage of blast furnace bottom gas according to claim 2 , wherein the blocking block ( 5 ) is a concrete blocking block. 4 .

4. The sealing method of the sealing structure for preventing the leakage of blast furnace bottom gas according to claim 1, wherein the step comprises:

S1. Outer sealing: the casting material is added to the first outer casing (31) and the second outer casing (41) through the pouring gate (9) to form the first outer casting layer (3) and the second outer casting layer (4) respectively. ;

S2. Internal plugging: by drilling holes on the bottom sealing plate (6), the area between the bottom sealing plate (6), the support column (7), the carbon brick (8) and the furnace shell (1) is self-flowing The material is filled to form an inner grouting layer (10).

5 . The sealing method of the sealing structure for preventing the leakage of blast furnace bottom gas according to claim 4 , wherein the self-flowing material in step S2 is epoxy resin. 6 .