Impermeable furnace lining structure

Abstract

The utility model relates to the technical field of furnace linings, and discloses an impermeable furnace lining structure. The anti-seepage furnace lining structure comprises a foundation assembly, an anti-seepage assembly is installed at the rear end of the foundation assembly, a protective layer is installed at the upper end of the anti-seepage assembly, a connecting layer is installed at the lower end of the protective layer, a supporting plate is installed in front of the upper end of the protective layer, and a filling opening is formed in the upper end of the supporting plate. A heat preservation fire-resistant assembly is installed at the front end of the basic assembly, a fire-resistant coating layer is installed at the upper end of the heat preservation fire-resistant assembly, a filling layer is installed at the upper end of the fire-resistant coating layer, and a heat insulation coating layer is installed at the upper end of the filling layer. The problems that the contents of harmful elements such as potassium, sodium, zinc and sulfur in existing blast furnace charging raw materials are gradually increased, so that the harmful elements permeate into different parts of the blast furnace through furnace lining gaps, the silicon-aluminum refractory material abnormally expands, the refractory material is peeled off and seriously eroded, and the service life of the blast furnace is shortened are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace linings, and specifically relates to a furnace lining structure with anti-permeation performance. Background Art

[0002] The furnace lining refers to the materials on the inner surface of various smelting, heat preservation and other industrial equipment. Its function is to protect the inner wall of the smelting equipment from thermal corrosion or mechanical wear, and at the same time, it can maintain the high-temperature atmosphere and temperature stability inside the equipment to ensure the normal operation of the equipment. The selection of furnace lining materials often depends on factors such as the type, temperature, pressure, etc. of the smelting system, and at the same time, factors such as the cost, durability, and safety of the materials also need to be considered.

[0003] The existing Chinese utility model patent with the reference publication number: CN207537472U discloses a furnace lining structure for a nickel-iron small blast furnace with high cooling intensity and good support effect, including a furnace shell and bricks arranged inside the furnace shell. A castable is arranged between the furnace shell and the bricks. The bricks are divided into long bricks and short bricks, and the long bricks and short bricks are arranged alternately. The castable is poured between the long bricks, short bricks and the furnace shell; a cooling device is arranged between the furnace shell and the bricks, and the cooling device is fixed on the furnace shell. The cooling device includes a thick-walled seamless pipe, the thick-walled seamless pipe is U-shaped, and the two ends of the thick-walled seamless pipe pass through the furnace shell and face the outside of the furnace shell, and the thick-walled seamless pipe is cooled by water. At least 3 U-shaped thick-walled seamless pipes are arranged from top to bottom. The cooling device includes anchor heat-conducting nails fixed on the furnace shell, and a spraying device is arranged outside the furnace shell to spray the furnace shell. The castable is C-SiC-AL castable.

[0004] Based on the retrieval of the above patent and the combination with the equipment in the prior art, it is found that due to the gradual increase in the content of harmful elements such as potassium, sodium, zinc and sulfur in the current blast furnace charge, the harmful elements penetrate into different parts of the blast furnace through the voids of the furnace lining, causing abnormal expansion of the aluminosilicate refractory material, resulting in refractory spalling and serious erosion, shortening the life of the blast furnace. When the blast furnace is in use, the refractory heat preservation performance of the internal furnace lining is poor, resulting in subsequent impacts on the quality of ironmaking. The existence of these problems affects the use of the device. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a furnace lining structure with anti-permeation performance, which can effectively prevent the problems caused by the gradual increase in the content of harmful elements such as potassium, sodium, zinc and sulfur in the current blast furnace charge, resulting in the penetration of harmful elements into different parts of the blast furnace through the voids of the furnace lining, causing abnormal expansion of the aluminosilicate refractory material, resulting in refractory spalling and serious erosion, and shortening the life of the blast furnace.

[0007] Technical Solution

[0008] To achieve the above object, the present utility model provides the following technical solutions: An anti-permeation furnace lining structure includes a base component, and an anti-seepage component for anti-permeating the original furnace lining is installed at the rear end of the base component, and a heat-insulating and refractory component for facilitating heat-insulating and refractory treatment of the original furnace lining is installed at the front end of the base component.

[0009] A protective layer is installed at the upper end of the anti-seepage component, and a connecting layer is installed at the lower end of the protective layer. A support plate is installed in front of the upper end of the protective layer, and a filling port is installed at the upper end of the support plate. The outer refractory layer performs refractory treatment on the anti-seepage component;

[0010] A refractory coating layer is installed at the upper end of the heat-insulating and refractory component, a filling layer is installed at the upper end of the refractory coating layer, a heat-insulating coating layer is installed at the upper end of the filling layer, and a heat-preserving coating layer is installed at the upper end of the heat-insulating coating layer. The heat-insulating coating layer and the heat-preserving coating layer are used in combination to facilitate increasing the heat-preserving property inside the furnace lining.

[0011] As a preferred technical solution of the present utility model, a raw material furnace lining is installed at the upper end of the base component, and a connecting plate is installed at the upper end of the raw material furnace lining. The raw material furnace lining is convenient for installing it inside the blast furnace for use.

[0012] As a preferred technical solution of the present utility model, an outer refractory layer is installed at the rear end of the anti-seepage component, and an anti-corrosion layer is installed at the rear end of the outer refractory layer. The anti-corrosion layer increases the overall corrosion resistance property.

[0013] As a preferred technical solution of the present utility model, a thickening layer is installed at the upper end of the heat-insulating and refractory component. The thickening layer is convenient for thickening the original furnace lining.

[0014] As a preferred technical solution of the present utility model, the anti-seepage component is installed at the rear end of the raw material furnace lining in the base component, and the heat-insulating and refractory component is installed at the front end of the raw material furnace lining in the base component.

[0015] As a preferred technical solution of the present utility model, the material at the upper end of the raw material furnace lining is refractory mud material, and a graphite layer is installed at the upper end of the raw material furnace lining.

[0016] As a preferred technical solution of the present utility model, the material at the upper end of the protective layer is ceramic fiber board, the material of the connecting layer is the same as that at the upper end of the protective layer, the connecting layer connects the raw material furnace lining, the support plate is aluminum silicate board, and the upper end of the outer refractory layer is silicate.

[0017] Compared with the prior art, the present utility model provides an anti-permeation furnace lining structure with the following beneficial effects:

[0018] 1. The utility model is provided with a seepage prevention component. A protective layer is installed in the seepage prevention component. The protective layer is a ceramic fiber board, which is a new type of insulating material with the advantages of light weight, low thermal conductivity and good chemical stability. A connection layer is installed at the upper end. The connection layer has the same structure as the protective layer. A support plate is installed at the upper end. The upper end of the support plate is a silicate aluminum board, which has characteristics such as temperature tolerance and good chemical stability. This structure effectively prevents the harmful elements such as potassium, sodium, zinc and sulfur in the current blast furnace burden from gradually increasing in content, causing the harmful elements to penetrate into different parts of the blast furnace through the gaps in the furnace lining, resulting in abnormal expansion of the aluminosilicate refractory material, causing refractory spalling and serious erosion, and shortening the service life of the blast furnace by adding a structure to the outer end of the original furnace lining and thickening the traditional furnace lining as a whole.

[0019] 2. The utility model is provided with a heat preservation and refractory component. A refractory coating layer is installed in the heat preservation and refractory component. The upper end of the refractory coating layer is an acid and alkali resistant coating, which is convenient for fireproof treatment of the upper end of the furnace lining. An insulating coating layer is installed at the upper end. The upper end of the insulating coating layer is a silicate aluminum material, which has high heat insulation performance. The upper end of the heat preservation coating layer is a silicate fiber, which has good high temperature resistance, heat insulation and fireproof performance. This structure is convenient for increasing the overall refractory and heat preservation function of the furnace lining, and effectively prevents the poor refractory and heat preservation performance of the internal furnace lining during the use of the blast furnace, resulting in subsequent impact on the ironmaking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 is a schematic diagram of the basic component of the structure of the utility model;

[0022] Figure 3 is a schematic diagram of the seepage prevention component of the structure of the utility model;

[0023] Figure 4 is a schematic diagram of the heat preservation and refractory component of the structure of the utility model.

[0024] Wherein: 1. Basic component; 101. Raw material furnace lining; 102. Connecting plate; 2. Seepage prevention component; 201. Protective layer; 202. Connection layer; 203. Support plate; 204. Filling port; 205. Outer refractory layer; 206. Erosion prevention layer; 3. Heat preservation and refractory component; 301. Thickening layer; 302. Refractory coating layer; 303. Filling layer; 304. Insulating coating layer; 305. Heat preservation coating layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes in detail the embodiments of the utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0026] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Please refer to Figure 1 - Figure 4 , in this embodiment, an anti-permeation furnace lining structure includes: a base component 1, an anti-seepage component 2 is installed at the rear end of the base component 1, a protective layer 201 is installed at the upper end of the anti-seepage component 2, and a connecting layer 202 is installed at the lower end of the protective layer 201. A support plate 203 is installed in front of the upper end of the protective layer 201, a filling port 204 is installed at the upper end of the support plate 203, a heat-insulating and refractory component 3 is installed at the front end of the base component 1, a refractory coating layer 302 is installed at the upper end of the heat-insulating and refractory component 3, a filling layer 303 is installed at the upper end of the refractory coating layer 302, and a heat-insulating coating layer 304 is installed at the upper end of the filling layer 303. A heat-insulating coating layer 305 is installed at the upper end of the heat-insulating coating layer 304, a thickening layer 301 is installed at the upper end of the heat-insulating and refractory component 3. The anti-seepage component 2 is installed at the rear end of the raw material furnace lining 101 in the base component 1, and the heat-insulating and refractory component 3 is installed at the front end of the raw material furnace lining 101 in the base component 1.

[0029] With the above structure, the basic component 1 facilitates the connection of the upper structure and the use of the overall structure. The anti-seepage component 2 facilitates the thickening and anti-seepage treatment of the original furnace lining. The heat-insulating refractory component 3 facilitates the refractory and heat-insulating effect on the original furnace lining. The upper end of the refractory coating layer 302 is an acid- and alkali-resistant coating. The upper end of the heat-insulating coating layer 304 is aluminosilicate material. The inside of the filling layer 303 is nano-aluminum oxide. The upper end of the heat-insulating coating layer 305 is silicate fiber. By installing the thickening layer 301, it is convenient to thicken the original furnace lining. The refractory coating layer 302 facilitates the refractory treatment of the upper end of the furnace lining. The filling layer 303 fills the material. The combined use of the heat-insulating coating layer 304 and the heat-insulating coating layer 305 facilitates the increase of the heat-insulating property inside the furnace lining.

[0030] Please refer to Figure 1 - Figure 4 At the upper end of the basic component 1, a raw material furnace lining 101 is installed, and at the upper end of the raw material furnace lining 101, a connecting plate 102 is installed. The material at the upper end of the raw material furnace lining 101 is refractory clay material, and a graphite layer is installed at the upper end of the raw material furnace lining 101.

[0031] With the above structure: By installing the raw material furnace lining 101, it is convenient to install it inside the blast furnace for use. The connecting plate 102 installs and connects other components.

[0032] Please refer to Figure 1 - Figure 4 At the rear end of the anti-seepage component 2, an outer refractory layer 205 is installed. At the rear end of the outer refractory layer 205, an anti-erosion layer 206 is installed. The material at the upper end of the protective layer 201 is ceramic fiber board. The material of the connecting layer 202 is the same as that of the upper end of the protective layer 201. The connecting layer 202 connects the raw material furnace lining 101. The support plate 203 is a silicate aluminum plate. The upper end of the outer refractory layer 205 is silicate.

[0033] With the above structure: Through the protective layer 201, the upper end of the raw material furnace lining 101 is protected. The connecting layer 202 connects the basic component 1. The support plate 203 facilitates the connection between the protective layer 201 and the raw material furnace lining 101. The filling port 204 fills the material. The outer refractory layer 205 conducts refractory treatment on the anti-seepage component 2. The anti-erosion layer 206 increases the overall erosion resistance.

[0034] In use, first, adjust the upper end of the original raw material furnace lining 101, and install the anti-seepage component 2 at the rear end. A protective layer 201 is installed in the anti-seepage component 2. The protective layer 201 is connected to the raw material furnace lining 101 through the connecting layer 202 at the lower end. The protective layer 201 is a ceramic fiber board, which is a new type of insulating material with the advantages of light weight, low thermal conductivity, and good chemical stability. Install a support plate 203 at the upper end of the protective layer 201. The upper end of the support plate 203 is a silicate aluminum plate, which has characteristics such as temperature tolerance and good chemical stability. In order to increase the heat preservation and fire resistance properties of the upper end of the original furnace lining, install a heat preservation and fire resistance component 3 at the upper end. A refractory coating layer 302 is installed in the heat preservation and fire resistance component 3. The upper end of the refractory coating layer 302 is an acid and alkali resistant coating, which is convenient for fire resistance treatment of the upper end of the furnace lining. An insulating coating layer 304 is installed at the upper end of the refractory coating layer 302. The upper end of the insulating coating layer 304 is a silicate aluminum material, which has high heat insulation performance. The upper end of the heat preservation coating layer 305 is a silicate fiber, which has good high temperature resistance, heat insulation, and fire prevention performance, and is convenient for increasing the overall fire resistance and heat preservation function of the furnace lining.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impermeable furnace lining structure, characterized in that: The invention comprises a base component (1), wherein an anti-seepage component (2) is installed at the rear end of the base component (1), a protective layer (201) is installed at the upper end of the anti-seepage component (2), and a connecting layer (202) is installed at the lower end of the protective layer (201), a support plate (203) is installed in front of the upper end of the protective layer (201), and a filling port (204) is installed at the upper end of the support plate (203), a thermal insulation and fire-resistant component (3) is installed at the front end of the base component (1), a fire-resistant coating layer (302) is installed at the upper end of the fire-resistant coating layer (302), a filling layer (303) is installed at the upper end of the fire-resistant coating layer (302), a heat-insulating coating layer (304) is installed at the upper end of the filling layer (303), and a heat-insulating coating layer (305) is installed at the upper end of the heat-insulating coating layer (304).

2. The impermeable furnace lining structure according to claim 1, characterized in that: A raw material furnace lining (101) is installed at the upper end of the basic assembly (1), and a connecting plate (102) is installed at the upper end of the raw material furnace lining (101).

3. The impermeable furnace lining structure according to claim 1, characterized in that: An outer fire-resistant layer (205) is installed at the rear end of the anti-seepage component (2), and an anti-corrosion layer (206) is installed at the rear end of the outer fire-resistant layer (205).

4. The impermeable furnace lining structure according to claim 1, characterized in that: A thickening layer (301) is installed on the upper end of the thermal insulation refractory component (3).

5. The impermeable furnace lining structure according to claim 1, characterized in that: The anti-seepage component (2) is installed at the rear end of the raw material furnace lining (101) in the basic component (1), and the thermal insulation refractory component (3) is installed at the front end of the raw material furnace lining (101) in the basic component (1).

6. The impermeable furnace lining structure according to claim 2, characterized in that: The upper end material of the raw material furnace lining (101) is refractory clay material, and a graphite layer is installed on the upper end of the raw material furnace lining (101).

7. The impermeable furnace lining structure according to claim 3, characterized in that: The material of the upper end of the protective layer (201) is a ceramic fiberboard, the material of the connecting layer (202) is the same as that of the upper end of the protective layer (201), the connecting layer (202) is connected to the raw material furnace lining (101), the supporting plate (203) is an aluminum silicate plate, and the upper end of the outer end refractory layer (205) is silicate.

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