Composite structure of blast furnace tapping channel skimmer

Abstract

The utility model relates to the technical field of skimmers, in particular to a composite structure of a blast furnace tapping channel skimmer, which comprises a main body and a prefabricated brick fixedly connected inside the main body, the main body is formed by casting a castable, and the prefabricated brick is fixed in the main body in a casting manner; the number of the prefabricated bricks is multiple, and the multiple prefabricated bricks are arranged in the main body side by side. The slag skimmer has the beneficial effects that in actual use, when molten iron scours the slag skimmer, the casting material on the outermost layer, namely the main body, is scoured firstly, and after the casting material on the outermost layer is worn out, the prefabricated bricks are exposed, so that the scouring of the molten iron is borne by the prefabricated bricks, the prefabricated bricks have better slag iron erosion resistance and permeability resistance, the service life of the prefabricated bricks is longer, and the service life of the slag skimmer is prolonged. Therefore, the overall service life of the skimmer is prolonged, and actual production operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of skimmers, and particularly relates to a composite structure of a blast furnace tapping runner skimmer. Background Art

[0002] In the tapping yard of an ironmaking plant, the main runner, as an important facility for carrying molten slag and iron flowing out of the blast furnace tapping hole, its performance is directly related to the continuity and stability of blast furnace production. The main runner not only bears the flow of high-temperature slag and iron, but also undertakes the key task of separating slag and iron. And the skimmer, as a key functional component for separating slag and iron in the main runner, has an extremely harsh working environment, suffering from continuous erosion and strong scouring by high-temperature slag and iron.

[0003] During the blast furnace tapping process, the mixture of molten iron and molten slag sprays out from the tapping hole at high speed, directly impacting the bottom of the main runner, generating a strong splashing effect. These splashed molten slags flow turbulently away from the tapping hole under the rapid impact of the slag and iron. When the slag-iron mixture flows to the skimmer, the skimmer separates the slag and iron through its special structure. The molten iron flows through a specific channel at the bottom of the skimmer to the small well, while the molten slag floats on the upper part of the molten iron due to its lower density and stirs and undulates at the upper part of the skimmer.

[0004] However, during the process of the molten iron flowing through the aisle at the bottom of the skimmer to the small well, the bottom of the skimmer is immersed in the high-temperature molten iron for a long time, suffering from the melting effect of the molten iron. At the same time, there is still some molten slag entrained in the molten iron, and these molten slags continuously scour the bottom of the skimmer, and as the tapping volume increases, the scouring intensity also increases continuously. This harsh working environment poses extremely high requirements on the materials and structure of the skimmer.

[0005] Currently, skimmers are usually made of castable materials. Although this material has certain high-temperature resistance and erosion resistance, its structural strength is relatively limited. Under the continuous erosion and scouring of high-temperature slag and iron, the service life of the skimmer is often short and needs to be replaced frequently, which not only increases the production cost but also affects the continuity and stability of blast furnace production.

[0006] Therefore, a composite structure of a blast furnace tapping runner skimmer is needed to overcome the occurrence of the above problems. Summary of the Utility Model

[0007] In order to solve the above problems, the embodiment of the utility model provides a composite structure of a blast furnace tapping runner skimmer, achieving the purpose of solving the problems proposed in the background art.

[0008] In order to achieve the above object, the embodiment of the present utility model specifically adopts the following technical solutions: A composite structure of a slag skimmer for a blast furnace iron notch, comprising a main body and precast bricks fixedly connected inside the main body; the main body is formed by casting refractory castable, and the precast bricks are cast and fixed inside the main body; there are multiple precast bricks, and the multiple precast bricks are arranged side by side inside the main body.

[0009] As a further improvement of the above technical solution:

[0010] A first groove is provided on the slag-facing surface of the precast brick, and a second groove is provided on the side surface of the precast brick.

[0011] The first groove and the second groove are arranged in a staggered manner.

[0012] A clamping member for clamping a plurality of precast bricks is fixedly connected inside the main body, and a clamping groove for cooperating with the clamping member is provided on the precast brick.

[0013] A lifting hook is fixedly connected to the top of the main body.

[0014] The beneficial effects of the embodiment of the present utility model are as follows:

[0015] During actual use, when the molten iron scours the slag skimmer, it first scours the outermost layer of refractory castable, that is, the main body. When the outermost layer of refractory castable is worn out, the precast bricks are exposed, so that the precast bricks are used to withstand the scouring of the molten iron. The precast bricks have good slag and iron erosion resistance and permeability, and their service life is relatively long, thus extending the overall service life of the slag skimmer and facilitating actual production operations;

[0016] Due to the volume limitation of the precast bricks, for precast bricks made of the same material, the larger the volume of the precast brick, the lower its compressive strength, mainly because the larger the volume of the precast brick, the more likely it is to produce a hollow structure inside during production, resulting in a decrease in compressive strength; therefore, in this application, multiple small-volume precast bricks are used and are cast and fixed together by refractory castable, thereby improving the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic cross-sectional view of the present utility model from the first perspective;

[0019] Figure 3 is a schematic cross-sectional view of the present utility model from the second perspective;

[0020] Figure 4 is a schematic structural diagram of the precast brick part of the present utility model.

[0021] In the figure: 1. Main body; 2. Prefabricated brick; 3. First groove; 4. Second groove; 5. Card slot; 6. Fastening piece; 7. Hook. Specific embodiments

[0022] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0023] See Figures 1 to 4 , an embodiment of the present invention discloses a composite structure of a slag skimmer for a blast furnace iron notch, including a main body 1 and a prefabricated brick 2 fixedly connected inside the main body 1; the main body 1 is formed by casting refractory castable, and the prefabricated brick 2 is cast and fixed inside the main body 1; the prefabricated brick 2 is made of aluminum-silicon carbide-carbon material, has good strength, density and low porosity, has good slag and iron erosion resistance and permeability, and the compressive strength of the prefabricated brick 2 is 80.0 MPa and the bulk density is 3.00 g / cm 3 ;

[0024] In actual use, when the molten iron scours the slag skimmer, it first scours the outermost layer of refractory castable, i.e., the main body 1. When the outermost layer of refractory castable is worn out, the prefabricated brick 2 is exposed, so that the prefabricated brick 2 can withstand the scouring of the molten iron. The prefabricated brick 2 has good slag and iron erosion resistance and permeability, and its service life is long, thus extending the overall service life of the slag skimmer and facilitating actual production operations;

[0025] A plurality of prefabricated bricks 2 are provided, and the plurality of prefabricated bricks 2 are arranged side by side inside the main body 1;

[0026] Due to the volume limitation of the prefabricated brick 2, for prefabricated bricks 2 made of the same material, the larger the volume of the prefabricated brick 2, the lower its compressive strength. This is mainly because the larger the volume of the prefabricated brick 2, the more likely it is to have a hollow structure inside during production, resulting in a decrease in compressive strength. Therefore, this application uses a plurality of small-volume prefabricated bricks 2 and casts and fixes them together with refractory castable, thereby improving the overall service life.

[0027] As a further explanation of this application:

[0028] A first groove 3 is provided on the slag-facing surface of the prefabricated brick 2, and a second groove 4 is provided on the side surface of the prefabricated brick 2; by providing the first groove 3 and the second groove 4, it is convenient to make the prefabricated brick 2 and the refractory castable closely combined.

[0029] As a further explanation of this application:

[0030] The first groove 3 and the second groove 4 are arranged alternately. When the first groove 3 and the second groove 4 are arranged at the same position, the perimeter of this part of the prefabricated brick 2 will be severely reduced, and it is easy to break at this part.

[0031] As a further description of the present application:

[0032] Inside the main body 1, a clamping member 6 for clamping a plurality of precast bricks 2 is fixedly connected, and a clamping groove 5 for cooperating with the clamping member 6 is formed on the precast brick 2; when pouring the precast brick 2, since the distance between the plurality of precast bricks 2 is small, affected by the extrusion of the pouring material, it is easy to cause the distance between the precast bricks 2 to expand, affecting the later forming and use. Therefore, the clamping member 6 is used to lock the distance between the plurality of precast bricks 2 to prevent the distance from changing during pouring.

[0033] As a further description of the present application:

[0034] A lifting hook 7 is fixedly connected to the top of the main body 1, which is convenient for handling.

[0035] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0038] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A composite structure of a blast furnace tapping ditch slag skimmer, characterized in that: It comprises a main body (1) and a prefabricated brick (2) fixedly connected to the inside of the main body (1); the main body (1) is casted by a casting material, and the prefabricated brick (2) is cast and fixed to the inside of the main body (1); The prefabricated bricks (2) are provided in plurality, and the plurality of prefabricated bricks (2) are arranged side by side inside the main body (1).

2. The composite structure of the blast furnace tapping ditch slag skimmer according to claim 1, characterized in that: A groove one (3) is provided on the slag-facing surface of the precast brick (2), and a groove two (4) is provided on the side surface of the precast brick (2).

3. The composite structure of the blast furnace tapping ditch slag skimmer according to claim 2, characterized in that: The groove one (3) and the groove two (4) are arranged alternately.

4. The composite structure of the blast furnace tapping ditch slag skimmer according to claim 1, characterized in that: A clamping piece (6) for clamping a plurality of prefabricated bricks (2) is fixedly connected inside the main body (1), and a clamping slot (5) for use with the clamping piece (6) is provided on the prefabricated brick (2).

5. The composite structure of the blast furnace tapping ditch slag skimmer according to claim 1, characterized in that: A hook (7) is fixedly connected to the top of the main body (1).

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