Tundish prefabricated part in steel casting industry

Abstract

The utility model discloses a tundish prefabricated part in the steel casting industry, and belongs to the technical field of steel casting. The prefabricated part comprises a tundish, a furnace nozzle filling layer arranged on one side of the tundish, a supporting part arranged at the bottom of the tundish, a supporting filling layer arranged between the tundish and the supporting part, and a pouring pipe penetrating through the filling layer and the supporting part to be communicated with the tundish. The tundish is in a spoon shape and comprises a containing cavity, a slag blocking plate installed in the tundish and used for filtering molten steel dross and a plurality of hoisting holes formed in the surface of the slag blocking plate. The tundish prefabricated part in the steel casting industry serves as a working layer in direct contact with molten steel and has better high temperature resistance and scouring resistance, the integral structure guarantees the overall size of a tundish, and installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel casting, and particularly relates to a tundish precast part in the iron and steel casting industry. Background Art

[0002] In the black casting industry, the tundish is used to transport molten metal from the melting furnace to the sand casting mold. Its function is to ensure that the molten metal flows into the sand mold evenly and stably. The tundish can also store and adjust the temperature, composition and flow rate of the molten metal to ensure the stability of the casting process and product quality. It is an indispensable equipment in the casting process.

[0003] During the casting process of iron and steel, the tundish needs to stabilize the steel flow, reduce the erosion of the steel flow on the sand mold, store the molten steel, ensure the uniform temperature of the molten steel and separate and float the non-metallic inclusions and the molten steel. However, the service life of the tundish is generally not long, and it is very easy to crack during the baking process after pouring. It needs to be replaced after being used for a period of time. And to ensure the production efficiency of casting, the tundish also needs to be easy to install and have a long service life. Therefore, in view of the above problems, we propose a tundish precast part in the iron and steel casting industry. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tundish precast part in the iron and steel casting industry, so as to meet the structural requirements such as easy installation, long service life and wear resistance of the tundish.

[0005] To solve the above technical problems, the utility model provides a tundish precast part in the iron and steel casting industry, which includes a tundish, a nozzle filling layer arranged on one side of the tundish, a support member arranged at the bottom of the tundish, a support filling layer arranged between the tundish and the support member, and a pouring pipe penetrating through the filling layer and communicating the support member with the tundish;

[0006] The tundish is in a spoon shape, and includes a receiving cavity, a slag baffle installed inside the tundish for filtering the floating slag of the molten steel, and a plurality of lifting holes arranged on its surface.

[0007] Preferably, the receiving cavity includes a feed port, a mounting groove, and a blanking hole arranged at its bottom.

[0008] Preferably, the slag baffle is installed in the mounting groove.

[0009] Preferably, the blanking hole is communicated with the pouring pipe.

[0010] Preferably, the nozzle filling layer uses plastic refractory to fill the gap between the tundish and the support member.

[0011] Preferably, the support filling layer uses dry vibration material to fill the gap between the tundish and the support member.

[0012] Preferably, the bottom of the accommodating cavity is inclined towards the pouring pipe.

[0013] The proportion of the flow area of the accommodating cavity blocked by the slag baffle ranges from 70% to 80%.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: As the working layer in direct contact with molten steel in the tundish precast of the iron and steel casting industry, the tundish precast of the present utility model has better high-temperature resistance and erosion resistance, and this integral structure ensures the overall size of the tundish, making it more convenient for installation. By using the prefabricated and pre-baked tundish precast, the time required for re-baking after the traditional tundish is poured can be saved. This solution saves time and effort, saves installation and preparation time, and also avoids the problem of cracking of the working layer during the baking process after the traditional tundish is poured, improves the service life of the tundish, and greatly improves the production efficiency of the iron and steel casting industry. Description of the Drawings

[0015] Figure 1 is an installation schematic diagram of a tundish precast in the iron and steel casting industry provided by the present utility model;

[0016] Figure 2 is a structural schematic diagram of a tundish precast in the iron and steel casting industry provided by the present utility model;

[0017] Figure 3 is a top view of a tundish precast in the iron and steel casting industry provided by the present utility model;

[0018] In the figure: 1, tundish; 101, accommodating cavity; 101a, feed inlet; 101b, installation groove; 101c, blanking hole; 102, slag baffle; 103, lifting hole; 2, nozzle filling layer; 3, support; 4, support filling layer; 5, pouring pipe. Detailed Embodiments

[0019] The following further detailed description of the present utility model is made in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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, and may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations. Embodiment

[0022] The present utility model provides a tundish precast part in the iron and steel casting industry. Please refer to Figures 1 to 3 , which includes a tundish 1, a nozzle filling layer 2 provided on one side of the tundish 1, a support member 3 provided at the bottom of the tundish 1, a support filling layer 4 provided between the tundish 1 and the support member 3, and a pouring pipe 5 that penetrates through the filling layer 4 and communicates with the support member 3 and the tundish 1;

[0023] The tundish 1 is spoon-shaped and includes a receiving cavity 101, a slag retaining plate 102 installed inside the tundish 1 for filtering the floating slag of molten steel, and a plurality of lifting holes 103 provided on its surface.

[0024] The receiving cavity 101 includes a feed inlet 101a, an installation groove 101b, and a blanking hole 101c provided at its bottom; the slag retaining plate 102 is installed in the installation groove 101b; the blanking hole 101c communicates with the pouring pipe 5; the nozzle filling layer 2 uses plastic refractory to fill the gap between the tundish 1 and the support member 3; the support filling layer 4 uses dry vibratable material to fill the gap between the tundish 1 and the support member 3; the bottom of the receiving cavity 101 is inclined towards the pouring pipe 5.

[0025] It should be noted that the tundish 1 and the slag dam 102 are both made of special refractory materials. Their special material compositions endow them with excellent anti-mechanical impact performance and heat preservation performance. The spoon-shaped design helps to evenly distribute the temperature, reduce thermal stress, and lower the risk of thermal crack formation. The spoon-shaped structure also facilitates the flow of molten metal, reduces oxidation and slag inclusion of the metal during transportation, and improves the quality of the metal.

[0026] Preferably, the slag dam 102 is plate-shaped and is used to confine the strong eddy current caused by the impact of the ladle stream in a local area, prevent the surface fluctuation caused by the diffusion of turbulence from entraining slag into the molten steel, and block the floating slag on the surface of the molten steel. By effectively blocking slag and impurities, the slag dam 102 can improve the purity of the molten metal, reduce the generation of inclusions, and thus improve the mechanical properties and appearance of the casting.

[0027] Preferably, the slag dam 102 is a detachable prefabricated part, which is combined with the tundish 1 through the installation groove 101b. During use, the worn or corroded slag dam 101 can be replaced without replacing the entire tundish 1, thereby reducing production costs.

[0028] Preferably, there are four lifting holes 103, which are evenly opened on the upper surface of the tundish 1. The lifting holes 103 are threaded holes, which are convenient for the installation and lifting of the tundish prefabricated part.

[0029] Preferably, the plastic refractory is a refractory material with a certain plasticity, which is composed of granular and powdery materials, binder and plasticizer such as plastic clay, and a small amount of water. It is commonly used in parts that require complex shapes or need to be quickly repaired on site, such as the furnace nozzle, furnace wall, etc. Therefore, the furnace nozzle filling layer 2 selects this kind of refractory material.

[0030] Preferably, the dry vibration material is a waterless refractory material, which is composed of refractory aggregates and binders, and can be formed in a relatively short time. It is commonly used in places such as the furnace bottom and furnace lining that require high temperature resistance and resistance to erosion by molten metal. Therefore, the support filling layer 4 selects this kind of refractory material.

[0031] In summary, as the working layer in direct contact with molten steel, the tundish prefabricated part of the present utility model has better high-temperature resistance and erosion resistance, and this integral structure ensures the overall size of the tundish, making it more convenient for installation. By using the prefabricated and pre-baked tundish prefabricated part, the time required for re-baking after the traditional tundish is poured can be saved. This solution saves time and effort, saves installation and preparation time, and also avoids the problem of cracking of the working layer during the baking process after the traditional tundish is poured, improves the service life of the tundish, and greatly improves the production efficiency of the iron and steel casting industry.

[0032] The above description is only a description of the preferred embodiments of the present utility model and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the art of the present utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An intermediate ladle precast part for the iron and steel casting industry, characterized in that It includes a tundish (1), a nozzle filling layer (2) arranged on one side of the tundish (1), a support (3) arranged at the bottom of the tundish (1), a support filling layer (4) arranged between the tundish (1) and the support (3), and a pouring tube (5) penetrating through the filling layer (4) and communicating the support (3) with the tundish (1); The tundish (1) is spoon-shaped and includes a receiving cavity (101), a slag baffle (102) installed inside the tundish (1) for filtering dross in molten steel, and a plurality of lifting holes (103) arranged on its surface.

2. The tundish prefabricated part in the iron and steel casting industry according to claim 1, characterized in that, The receiving cavity (101) includes a feed inlet (101a), a mounting groove (101b), and a blanking hole (101c) arranged at its bottom.

3. The tundish precast member in the iron and steel casting industry according to claim 2, characterized in that, The slag baffle (102) is installed in the mounting groove (101b).

4. The tundish prefabricated part in the iron and steel casting industry according to claim 3, characterized in that, The blanking hole (101c) communicates with the pouring tube (5).

5. The tundish precast member according to claim 1, characterized in that, The nozzle filling layer (2) uses plastic refractory to fill the gap between the tundish (1) and the support (3).

6. The tundish precast member in the iron and steel casting industry according to claim 1, characterized in that The support filling layer (4) uses dry vibratable material to fill the gap between the tundish (1) and the support (3).

7. The tundish prefabricated part for the iron and steel casting industry according to claim 1, characterized in that The bottom of the receiving cavity (101) inclines towards the pouring tube (5); The proportion of the flow area of the receiving cavity (101) blocked by the slag baffle (102) ranges from 70% to 80%.

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