Sealing structure for air hole area of converter

Abstract

The utility model discloses a sealing structure for a wind eye area of a converter, which comprises a converter shell and a wind pipe, the wind pipe penetrates through the converter shell, a sealing filler is arranged in a gap between the wind pipe and the converter shell, and the sealing filler comprises an asbestos cord wound on the wind pipe and fire clay which wraps the asbestos cord and is filled in the gap between the wind pipe and the converter shell. According to the sealing structure provided by the utility model, a firm sealing layer is formed in the gap between the air pipe and the furnace shell, so that the condition of melt seepage is avoided, and the service life of the converter is obviously prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting, in particular to a sealing structure for an air eye area of ​​a converter. Background Art

[0002] The tuyere area of ​​the traditional copper matte blowing horizontal converter is built with multiple refractory bricks with holes. Most of the refractory bricks are made of magnesia-chromium. The refractory bricks with holes are mainly used for the air duct to pass from the outside of the converter into the converter. When laying, it is necessary to start from the refractory bricks at the air duct. The wet laying method is used. First, a layer of about 50mm cushion layer is laid on the surface of the furnace shell with ramming material and tamped, and then refractory bricks are used for masonry. Wet laying is used within the diameter of 1m at the air duct to make the tuyere bricks tightly combined. The rest of the parts are dry laid. The air duct needs to pass from the outside of the converter to the inside of the converter. The outer end of the air duct is threaded. The connection is fixed on the bellows, and the inside passes through the furnace shell of the converter and the air eye of the refractory bricks in turn. This installation method leads to a gap between the air duct and the furnace shell. With the influence of mechanical action, thermal stress and chemical action, refractory materials including refractory bricks are easily damaged, and then gaps are also generated between the refractory materials, which will cause the melt to seep out through the gap between the air duct and the furnace shell, causing damage to the furnace shell and the air duct. In severe cases, it may cause the converter to shut down, affecting the service life of the converter, resulting in an increase in the production cost of crude copper and an increase in labor intensity. Therefore, it is necessary to seal the gap between the air duct and the furnace shell.

[0003] The sealing method in the prior art mostly uses cardboard to seal the gap between the air duct and the furnace shell. However, this type of sealing method has the problem of poor sealing, and the melt will still leak from the gap between the air duct and the furnace shell. At the same time, it is not stable enough, and there is a problem of too short service life of the converter. Utility Model Content

[0004] In order to solve the defects of poor sealing between the air duct and the furnace shell of the converter and short service life of the converter in the prior art, the utility model proposes a sealing structure for the air eye area of ​​the converter.

[0005] The technical solution adopted by the utility model is: a sealing structure for the tuyere area of ​​a converter, comprising a furnace shell and an air duct, wherein the air duct passes through the furnace shell, and a sealing filler is provided between the gap between the air duct and the furnace shell, wherein the sealing filler comprises an asbestos rope wound around the air duct and fire mud wrapped around the asbestos rope and filled in the gap between the air duct and the furnace shell.

[0006] Furthermore, a masonry structure is provided in the furnace shell, and a ramming material layer is filled between the masonry structure and the furnace shell.

[0007] Furthermore, the masonry structure includes tuyere bricks, pad bricks, lining bricks and furnace bottom bricks. The tuyere bricks and pad bricks are built in the tuyere area of ​​the converter and form the inner lining layer of the converter with the furnace bottom bricks. The cross-section of the lining bricks is triangular, and the lining bricks are filled between the pad bricks and the furnace bottom bricks.

[0008] Furthermore, the air eye brick comprises a first brick body and a second brick body fitted together, a first semicircular groove is provided on the surface of the first brick body, a second semicircular groove is provided on the surface of the second brick body, and the first semicircular groove and the second semicircular groove are relatively spliced ​​to form an air eye for the air duct to pass through.

[0009] Furthermore, multiple layers of the cushion bricks are provided on both sides of the air eye bricks, and the cross-section of the cushion bricks is trapezoidal.

[0010] Furthermore, an isolation layer is provided between the ramming material layer and the masonry structure, and the isolation layer is made of glass fiber aluminum foil cloth or pure cotton cloth or carbon fiber cloth material.

[0011] Furthermore, the gaps between the air eye bricks, pad bricks, lining bricks and furnace bottom bricks of the masonry structure are no greater than 2 mm, and the flatness is no greater than 6 mm.

[0012] Compared with the prior art, the sealing structure proposed in the utility model forms a solid sealing layer between the gap between the air duct and the furnace shell, thereby avoiding the leakage of melt. After testing, the service life of the converter with a single patching was increased from 260 furnaces to 280 furnaces, during which no melt leakage occurred, and the service life of the converter was significantly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the converter of the utility model;

[0015] Figure 2 This is a schematic diagram of the sealing structure between the wind pipe and the furnace shell in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the stroke eye brick of the utility model.

[0017] The main figures in this application are:

[0018] 1. furnace shell; 2. air duct; 3. sealing filler; 31. asbestos rope; 32. fire clay; 5. ramming material layer; 6. air eye brick; 7. cushion brick; 8. lining brick; 9. furnace bottom brick; 61. first brick body; 62. second brick body; 611. first semicircular groove; 621. second semicircular groove. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and that mechanical composition, structure, electrical and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used herein are only for describing specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0021] This application proposes a sealing structure for the tuyere area of ​​a converter. Figure 1 , 2 As shown, it includes a furnace shell 1 and an air duct 2, and the air duct 2 passes through the furnace shell 1 to form a channel for conveying gas through the air duct 2. The utility model designs a sealing filler 3, which is filled in the gap between the air duct 2 and the furnace shell 1. The sealing filler 3 includes an asbestos rope 31 wrapped around the air duct 2 and a fire mud 32 wrapped around the asbestos rope 31 and filled in the gap between the air duct 2 and the furnace shell 1. In the process of conventional masonry, the asbestos rope 31 is used to seal the gap between the air duct 2 and the furnace shell 1, and the asbestos rope 31 is dipped in the fire mud 32 and then wrapped around the root of the air duct 2, and then the asbestos rope 31 is stuffed into the gap between the air duct 2 and the furnace shell 1 with a tool and tamped. After the fire mud 32 is dried, a solid sealing layer is formed, thereby avoiding the situation of melt seepage and increasing the service life of the converter.

[0022] Furthermore, a masonry structure is provided in the furnace shell 1, and a ramming material layer 5 is filled between the masonry structure and the furnace shell 1, the masonry structure includes tuyere bricks 6, pad bricks 7, lining bricks 8 and furnace bottom bricks 9, wherein the tuyere bricks 6 and pad bricks 7 are constructed in the tuyere area of ​​the converter to form an inner lining layer, and the lining bricks 8 have a triangular cross-section, and the ramming material is filled between the pad bricks 7 and the furnace bottom bricks 9, which can reduce the gaps between the bricks and form a tight fit between the bricks, effectively reducing the risk of damage and leakage of the inner lining layer, thereby extending the service life of the converter.

[0023] Preferably, the gaps between the wind eye bricks 6, pad bricks 7, lining bricks 8 and furnace bottom bricks 9 of the masonry structure are no greater than 2 mm, and the flatness is no greater than 6 mm.

[0024] Furthermore, combined with Figure 1 , 3 As shown, the wind eye brick 6 is composed of a first brick body 61 and a second brick body 62 that fit together. The surface of the first brick body 61 is provided with a first semicircular groove 611, and the surface of the second brick body 62 is provided with a second semicircular groove 621. The first semicircular groove 611 and the second semicircular groove 621 are relatively spliced ​​to form a wind eye for the air duct 2 to pass through. Such a fitting design enables the first brick body 61 and the second brick body 62 to be tightly connected, thereby enhancing the overall structural stability of the wind eye brick 6, reducing the possibility of damage and air leakage caused by temperature changes or mechanical vibrations, and the structure is simple and clear, easy to maintain and clean, and reduces the workload and maintenance costs of maintenance personnel. It is also possible to fill the sealing filler 3 (same as above) between the air duct 2 and the wind eye to increase the sealing between the air duct 2 and the wind eye brick 6 and improve the service life of the furnace body.

[0025] Furthermore, the pad bricks 7 have multiple layers on both sides, and the cross-section is trapezoidal. The use of trapezoidal bricks can better fill the curve shape and reduce the gap.

[0026] In addition, an isolation layer is set between the ramming material layer 5 and the masonry structure. The isolation layer can be made of glass fiber aluminum foil cloth, pure cotton cloth or carbon fiber cloth. The isolation layer is set between the masonry structure and the ramming material layer 5 to isolate the adhesion between the ramming material layer 5 and the masonry structure, making it easier to separate the ramming material layer 5 from the masonry structure, and it is easier and more convenient to dismantle the masonry structure.

[0027] In summary, the sealing structure proposed in the utility model forms a solid sealing layer between the gap between the air duct 2 and the furnace shell 1, thereby avoiding the leakage of melt. After testing, the service life of the converter with a single patching increased from 260 furnaces to 280 furnaces, during which no melt leakage occurred, and the service life of the converter was significantly increased.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure for the tuyere area of ​​a converter, characterized in that: The invention comprises a furnace shell and an air duct, wherein the air duct passes through the furnace shell, and a sealing filler is arranged between the gap between the air duct and the furnace shell. The sealing filler comprises an asbestos rope wound around the air duct and fire mud wrapped around the asbestos rope and filled in the gap between the air duct and the furnace shell.

2. The sealing structure for the tuyere area of ​​a converter according to claim 1, characterized in that: A masonry structure is also provided in the furnace shell, and a ramming material layer is filled between the masonry structure and the furnace shell.

3. The sealing structure for the tuyere area of ​​a converter according to claim 2, characterized in that: The masonry structure includes tuyere bricks, pad bricks, lining bricks and furnace bottom bricks. The tuyere bricks and pad bricks are built in the tuyere area of ​​the converter and form the inner lining layer of the converter with the furnace bottom bricks. The cross-section of the lining bricks is triangular, and the lining bricks are filled between the tuyere bricks, pad bricks and furnace bottom bricks.

4. The sealing structure for the tuyere area of ​​a converter according to claim 3, characterized in that: The air eye brick comprises a first brick body and a second brick body that fit together. The first brick body has a first semicircular groove on its surface, and the second brick body has a second semicircular groove on its surface. The first semicircular groove and the second semicircular groove are relatively spliced ​​to form an air eye for the air duct to pass through.

5. The sealing structure for the tuyere area of ​​a converter according to claim 3, characterized in that: Multiple layers of pad bricks are respectively arranged on both sides of the wind eye brick, and the cross section of the pad brick is trapezoidal.

6. The sealing structure for the tuyere area of ​​a converter according to claim 2, characterized in that: An isolation layer is also provided between the ramming material layer and the masonry structure, and the material of the isolation layer is glass fiber aluminum foil cloth or pure cotton cloth or carbon fiber cloth material.

7. The sealing structure for the tuyere area of ​​a converter according to claim 3, characterized in that: The gaps between the air eye bricks, pad bricks, lining bricks and furnace bottom bricks of the masonry structure are no greater than 2 mm, and the flatness is no greater than 6 mm.

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