Blast furnace tuyere sealing structure

Abstract

The utility model relates to the technical field of metallurgical ironmaking, and particularly discloses a blast-furnace tuyere sealing structure. Comprising a first water-soaked mud layer, a first plugging plate layer, a second water-soaked mud layer, a brick layer and a third water-soaked mud layer, wherein the first water-soaked mud layer is arranged in a small sleeve inner cavity of the blast-furnace tuyere and used for plugging a small sleeve, and the first plugging plate layer, the second water-soaked mud layer, the brick layer and the third water-soaked mud layer are sequentially arranged from the outer end face of the small sleeve to the outer end face of a middle sleeve of the blast-furnace tuyere in the axial direction of the small sleeve. A second blocking plate layer and a lubricating grease layer are sequentially arranged from the outer end face of the middle sleeve outwards in the axial direction of the middle sleeve. And the two side parts of each brick of the brick layer are correspondingly embedded into the second water steeping mud layer and the third water steeping mud layer respectively. According to the blast furnace tuyere sealing structure provided by the utility model, a small sleeve does not need to be disassembled and assembled, the time is saved, the efficiency is improved, the use amount of the blister mud is greatly reduced, the blister mud can be taken out more quickly during reblowing, manpower and material resources are saved, the efficiency is higher, and the arranged brick layer is firmer to support and fix the blister mud layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical ironmaking technical field, concretely relates to a blast furnace tuyere sealing structure. BACKGROUND

[0002] Blast furnace ironmaking is a common method in steel production, which has good technical and economic indicators, simple process, large production capacity, high production efficiency, low energy consumption and other advantages. When maintenance, production adjustment, equipment upgrading and other situations of the blast furnace are needed, sealing operation is often carried out. Sealing refers to closing the tuyere of the blast furnace and stopping the charging and tapping operation. The sealing operation usually includes the following steps: stopping charging: first, stop adding new raw materials into the furnace; discharging remaining products: discharging the molten metal or slag in the furnace; closing the tuyere: using refractory materials or other materials to close the tuyere to prevent air from entering and heat loss; cooling and ventilation: after sealing, the furnace body needs to be cooled and ventilated properly to ensure safety. During the sealing process of the blast furnace, in order to successfully restore the air, reduce heat loss during sealing, and minimize the reduction of air intake, the sealing measures of the tuyere are particularly important.

[0003] The blast furnace tuyere usually includes a large sleeve embedded in the wall of the furnace body and communicating with the inside and outside of the furnace, a middle sleeve coaxially sleeved in the large sleeve, and a small sleeve coaxially sleeved in the middle sleeve. Along the axial direction of the large sleeve, the outer end face of the large sleeve is located outside the outer end face of the middle sleeve, and the outer end face of the middle sleeve is located outside the outer end face of the small sleeve. One sealing process in the prior art is to first disassemble the small sleeve, then seal the inner cavity of the middle sleeve with water-soaked mud, and then set the sealing materials such as asbestos board and yellow mud outside the outer end face of the middle sleeve in sequence to realize the sealing of the blast furnace tuyere.

[0004] However, the sealing in the prior art has the following problems: 1. During sealing, the small sleeve needs to be disassembled, and the small sleeve needs to be reinstalled during air restoration, which is troublesome and increases the sealing time; 2. Since the middle sleeve is filled with a large amount of water-soaked mud, the water-soaked mud needs to be removed during air restoration, which is time-consuming and labor-intensive, and the efficiency is low; 3. The yellow mud is soft in texture and prone to collapse and cracking under the action of gravity. INVENTION CONTENTS

[0005] The utility model provides a blast furnace tuyere sealing structure, which aims to solve the technical problems of the prior art, such as the need to disassemble the small sleeve during sealing, the cumbersome sealing process, the long time, the need to remove a large amount of water-soaked mud in the middle sleeve during air restoration, the time-consuming and labor-intensive, and the easy collapse and cracking of the yellow mud.

[0006] The blast furnace tuyere sealing structure provided by the utility model, which comprises a first water bubble mud layer arranged in a small sleeve cavity of a blast furnace tuyere for plugging the small sleeve, a first plugging plate layer, a second water bubble mud layer, a brick layer and a third water bubble mud layer arranged in sequence along the axial direction of the small sleeve from the outer end surface of the small sleeve to the outer end surface of a middle sleeve of the blast furnace tuyere, a second plugging plate layer and a lubricating grease layer arranged in sequence along the axial direction of the middle sleeve from the outer end surface of the middle sleeve to the outside, and the two side portions of each brick of the brick layer are embedded in the second water bubble mud layer and the third water bubble mud layer respectively.

[0007] Preferably, the thickness of the first water bubble mud layer is the same as the length of the small sleeve.

[0008] Preferably, the material of the brick layer is light brick or clay brick.

[0009] Preferably, each brick of the brick layer is arranged in a stack.

[0010] Preferably, the first plugging plate layer and the second plugging plate layer are asbestos pads, carbon fiber pads or glass fiber pads.

[0011] Preferably, the thickness of the first plugging plate layer and the second plugging plate layer is 10 mm.

[0012] The thickness of the second water bubble mud layer and the third water bubble mud layer is 20-30 mm.

[0013] The thickness of the brick layer is 20-25 mm.

[0014] The thickness of the lubricating grease layer is 5-10 mm.

[0015] The beneficial effects are:

[0016] 1. In the blast furnace tuyere sealing structure, the small sleeve does not need to be disassembled during sealing, and the small sleeve does not need to be reassembled during air recovery, so the complex disassembly and assembly process is avoided, time is saved, and efficiency is improved. Furthermore, compared with the water bubble mud filling the entire middle sleeve cavity in the prior art, the use amount of water bubble mud is greatly reduced, and the water bubble mud can be taken out more quickly during air recovery, manpower and material resources are saved, and the efficiency is higher. Further, the three-layer water bubble mud layer and the lubricating grease layer improve the sealing effect, and the two-layer plugging plate layer and the brick layer support and fix the water bubble mud, prevent the water bubble mud layer from falling down due to gravity, and prevent cracking.

[0017] 2. The thickness of the first water bubble mud layer is the same as the length of the small sleeve, so that the first water bubble mud layer fills the small sleeve cavity, and the sealing effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present embodiments will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present application are illustrated by way of example and not limitation. Like or corresponding reference numerals are used to indicate like or corresponding portions throughout the several drawings, in which:

[0019] Figure 1 It is a sectional view of the blast furnace tuyere sealing structure of the present embodiment;

[0020] Figure 2 It is Figure 1 A partial enlarged view of the middle A part.

[0021] Marked:

[0022] 1, furnace body; 2, large sleeve; 3, middle sleeve; 4, small sleeve; 51, first water bubble mud layer; 52, first plugging plate layer; 53, second water bubble mud layer; 54, brick layer; 55, third water bubble mud layer; 56, second plugging plate layer; 57, grease layer. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] As Figure 1 and Figure 2 shown, the present embodiment provides a blast furnace tuyere sealing structure, wherein the blast furnace tuyere comprises a large sleeve 2 embedded in the peripheral wall of the furnace body 1 and communicating with the inside and outside of the furnace, a middle sleeve 3 coaxially sleeved in the large sleeve 2, and a small sleeve 4 coaxially sleeved in the middle sleeve 3. Along the axial direction of the large sleeve 2, the outer end surface of the large sleeve 2 is located outside the outer end surface of the middle sleeve 3, and the outer end surface of the middle sleeve 3 is located outside the outer end surface of the small sleeve 4. And the outer side opening of the middle sleeve 3 is gradually widened, that is, it is a horn structure. The blast furnace tuyere sealing structure comprises a first water bubble mud layer 51 arranged in the inner cavity of the small sleeve 4 for plugging the small sleeve 4, a first plugging plate layer 52, a second water bubble mud layer 53, a brick layer 54 and a third water bubble mud layer 55 arranged in turn along the axial direction of the small sleeve 4 from the outer end surface of the small sleeve 4 to the outer end surface of the middle sleeve 3, and a second plugging plate layer 56 and a grease layer 57 arranged in turn along the axial direction of the middle sleeve 3 from the outer end surface of the middle sleeve 3 outward. As Figure 2 shown, the first plugging plate layer 52, the second water bubble mud layer 53, the brick layer 54 and the third water bubble mud layer 55 are attached to the inner wall of the middle sleeve 3. The second plugging plate layer 56 and the grease layer 57 are attached to the inner wall of the large sleeve 2. The two side portions of each brick of the brick layer 54 are respectively embedded in the second water bubble mud layer 53 and the third water bubble mud layer 55.

[0025] The utility model discloses a blast furnace tuyere sealing structure, which comprises a small sleeve, a middle sleeve and a large sleeve, wherein the small sleeve is sleeved on the middle sleeve, and the middle sleeve is sleeved on the large sleeve.

[0026] Further, due to the first water bubble mud layer 51, the second water bubble mud layer 53 and the third water bubble mud layer 55, the three-layer water bubble mud setting makes the sealing effect better, can prevent the heat loss in the furnace and the air outside the furnace from entering. Because the two side parts of the brick block layer 54 are embedded in the second water bubble mud layer 53 and the third water bubble mud layer 55, the brick block layer 54 can support and fix the second water bubble mud layer 53 and the third water bubble mud layer 55, which can effectively prevent the water bubble mud from falling down due to gravity and causing cracking. The first plugging plate layer 52 can block the outer end surface of the small sleeve 4, preventing the water bubble mud of the first water bubble mud layer 51 from falling down. The second plugging plate layer 56 blocks the outer end surface of the middle sleeve 3, preventing the water bubble mud of the third water bubble mud layer 55 from falling down. The lubricating grease layer 57 can fix the second plugging plate layer 56 and seal, preventing air from entering and causing the water bubble mud layer to crack. The blast furnace tuyere sealing structure of the utility model has three-layer water bubble mud and a lubricating grease layer 57, which makes the sealing effect better. The two-layer plugging plate layer and the brick block layer 54 can support and fix the water bubble mud, preventing the water bubble mud layer from falling down and cracking.

[0027] As Figure 1 and Figure 2As shown, the water bubble mud is also called hydrated mud or bubble mud, which is a material used in construction and civil engineering, which is mixed by soil and water. The water bubble mud has good plasticity and can be shaped into different shapes according to needs. The water bubble mud has strong viscosity and can be well attached to the surface of other materials. The dried water bubble mud has good sealing performance and can prevent water and air penetration. Based on the above advantages of the water bubble mud, the water bubble mud can meet the sealing use requirement. Preferably, the water bubble mud layer can adopt water mud, which is a mud containing more water, having the advantages of high water content, easy flow, strong plasticity, good adhesion and the like.

[0028] The thickness of the first water bubble mud layer 51 is the same as the length of the small sleeve 4, that is, the first water bubble mud layer 51 fills the inner cavity of the small sleeve 4, so that the sealing effect is better. For example, the length of the commonly used small sleeve 4 is 380mm, 400mm or 410mm, and the thickness of the first water bubble mud layer 51 is also 380mm, 400mm or 410mm.

[0029] The thickness of the second water bubble mud layer 53 and the third water bubble mud layer 55 is 20 to 30mm, preferably, the thickness of the second water bubble mud layer 53 and the third water bubble mud layer 55 is 25mm, which can be set according to actual conditions.

[0030] As shown in Figure 1 and Figure 2 The material of the brick layer 54 is light brick or clay brick. The light brick is also called light brick or light weight block, which is a modern building material, having good heat preservation and insulation performance and certain strength. The light brick has the advantages of light weight, good heat preservation and insulation performance, convenient construction, environmental protection and the like. The light brick includes autoclaved aerated concrete block, foam concrete block, gypsum block, slag light brick, ceramsite block and the like. The clay brick is a traditional building material, which is mixed, formed, dried and sintered by clay and other natural minerals. The clay brick has the advantages of high strength, good durability, good fire resistance, recyclability and the like. The clay brick includes sintered perforated brick, sintered hollow brick, split brick and the like. Preferably, the brick layer 54 of the utility model adopts light brick. The thickness of the brick layer 54 is 20 to 25mm, which can be selected according to needs.

[0031] As shown in Figure 1 and Figure 2 The bricks of the brick layer 54 are stacked, so that the construction is relatively simple and the construction efficiency is relatively high. The gaps between the bricks can be filled with the second water bubble mud layer 53 and the third water bubble mud layer 55, so that the brick layer 54 is more firm, and the second water bubble mud layer 53 and the third water bubble mud layer 55 are supported and fixed by the brick layer 54.

[0032] As shown in Figure 1 and Figure 2As shown, the first plugging plate layer 52 and the second plugging plate layer 56 are asbestos pads, carbon fiber pads or glass fiber pads. Among them, the asbestos pad is a gasket made of asbestos fibers and other materials, used for sealing and damping. The asbestos pad has good heat resistance, corrosion resistance, compressibility and resilience. The carbon fiber pad is a high-performance gasket material, which is mainly made of carbon fiber woven or laminated. The carbon fiber pad has the advantages of light weight, high strength, corrosion resistance, high temperature resistance, etc. The glass fiber pad is a gasket made of glass fiber woven or pressed, used for sealing, supporting and heat insulation. The glass fiber pad has good mechanical strength, heat resistance, chemical stability, compressibility and environmental protection. Preferably, the utility model adopts the asbestos pad. The thickness of the asbestos pad is usually 10mm, so the thickness of the first plugging plate layer 52 and the second plugging plate layer 56 is set to 10mm. Of course, the thickness of the first plugging plate layer 52 and the second plugging plate layer 56 can be set according to the needs.

[0033] As shown in Figure 1 and Figure 2 The grease layer 57 is composed of grease. Grease is a semi-solid lubricant, mainly composed of base oil and thickening agent, and various additives are added to improve its performance. Grease is commonly known as butter. Grease has high adhesion, waterproofness, high temperature resistance, wear resistance and durability. The thickness of the grease layer 57 is 5-10mm, which can be set according to the actual needs, and the grease layer 57 is evenly applied at the outer side of the second plugging plate layer 56, which can fix the second plugging plate layer 56 and further seal, prevent air from entering and cause the dry cracking phenomenon of the air bubble mud layer.

[0034] According to the above description of the present specification, those skilled in the art can also understand that the terms used as follows, such as "up", "down", "horizontal", "top", "bottom", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, which is only for the purpose of facilitating the description of the scheme of the present utility model and simplifying the description, and is not explicitly or implicitly indicated or implied that the devices or elements involved must have the said specific orientation, be constructed and operated in a specific orientation, therefore the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the present utility model.

[0035] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically limited.

Claims

1. A blast furnace tuyere seal structure, characterised in that, The first water bubble mud layer for sealing the small sleeve of the blast furnace tuyere, the first sealing plate layer, the second water bubble mud layer, the brick layer and the third water bubble mud layer are arranged in sequence along the axial direction of the small sleeve from the outer end surface of the small sleeve to the outer end surface of the middle sleeve of the blast furnace tuyere, and the second sealing plate layer and the lubricating grease layer are arranged in sequence along the axial direction of the middle sleeve from the outer end surface of the middle sleeve to the outside; the two side portions of each brick of the brick layer are embedded in the second water bubble mud layer and the third water bubble mud layer, respectively.

2. The blast furnace tuyere sealing structure according to claim 1, wherein the thickness of the first water bubble mud layer is the same as the length of the small sleeve.

3. The blast furnace tuyere sealing structure according to claim 1, wherein the material of the brick layer is light brick or clay brick.

4. The blast furnace tuyere sealing structure according to claim 1, wherein each brick of the brick layer is arranged in a stack.

5. The blast furnace tuyere sealing structure according to claim 1, wherein the first sealing plate layer and the second sealing plate layer are asbestos pads, carbon fiber pads or glass fiber pads.

6. The blast furnace tuyere sealing structure according to claim 1, wherein the thickness of the first sealing plate layer and the second sealing plate layer is 10 mm; the thickness of the second water bubble mud layer and the third water bubble mud layer is 20-30 mm; the thickness of the brick layer is 20-25 mm; and the thickness of the lubricating grease layer is 5-10 mm. ​ ​ ​ ​ ​ ​ ​ ​

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