Continuous casting tundish with nanometer heat insulation plate

Abstract

The utility model discloses a continuous casting tundish with a nanometer heat insulation plate, and relates to the technical field of casting. A continuous casting tundish with a nanometer heat insulation plate comprises a tundish fireproof shell, a plurality of water gaps and a flow dividing structure are formed in the inner bottom wall of the tundish fireproof shell, the flow dividing structure is located in the tundish fireproof shell and comprises an impact pad, a flow dividing cone, a threaded column and a nut, and the impact pad is fixedly installed on the inner bottom wall of the tundish fireproof shell; a threaded hole is formed in the inner bottom wall of the impact pad, a mounting groove is formed in the bottom of the impact pad, and molten steel can dispersedly flow along the conical surface of the sprue spreader when impacting the impact pad under the cooperation of the sprue spreader, the threaded column and the nut, so that the impact force in unit area is effectively reduced, and meanwhile, due to the fact that the conical structure can be detached, the service life of the impact pad is prolonged. And when the impact pad is seriously abraded or damaged, a new conical structure can be conveniently replaced without replacing the whole impact pad, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a continuous casting tundish with a nano-insulation plate. Background Technology

[0002] In the continuous casting process, the tundish is an important piece of equipment connecting the ladle and the crystallizer. Its internal structure and material selection have a significant impact on the quality and production efficiency of continuous casting.

[0003] In the design of traditional tundishes, the impact pad, as a key component that withstands the direct impact of molten steel, is usually made of refractory material cast as a whole. Although it can withstand certain high temperatures and erosion, it is still prone to wear, cracking or even falling off under the strong impact of high-temperature molten steel for a long time. This may lead to adverse phenomena such as eddies and inclusion accumulation when molten steel flows through the tundish, which in turn affects the internal and surface quality of the billet. Therefore, we propose a continuous casting tundish with a nano-insulation plate. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a continuous casting tundish with a nano-insulation plate. This solves the problem that the impact pad, as a key component that bears the direct impact of molten steel, is usually made of refractory material and cast as a whole. Although it can withstand certain high temperatures and erosion, it is still prone to wear, cracking or even falling off when subjected to strong impact from high-temperature molten steel for a long time. This may lead to adverse phenomena such as eddies and inclusions when molten steel flows through the tundish, which in turn affects the internal and surface quality of the billet.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a continuous casting tundish with a nano-insulation plate, comprising:

[0006] The refractory shell of the tundish has multiple water inlets on its inner bottom wall;

[0007] The flow diversion structure is located inside the refractory shell of the tundish.

[0008] The flow divider structure includes an impact pad, a flow divider cone, a threaded post, and a nut. The impact pad is fixedly installed on the inner bottom wall of the refractory shell of the tundish. A threaded hole is opened on the inner bottom wall of the impact pad. An installation groove is opened at the bottom of the impact pad, and the installation groove communicates with the interior of the threaded hole. The threaded post is threadedly connected to the interior of the threaded hole. The flow divider cone is welded to the top of the threaded post. The bottom thread of the threaded hole extends into the interior of the installation groove. The nut is threadedly sleeved on the outer surface of the threaded post and is located inside the installation groove.

[0009] Preferably, the impact pad has multiple diversion grooves on its exterior, all of which are connected to the interior of the impact pad, and all of which are inclined.

[0010] Preferably, a slag-retaining wall is fixedly connected inside the refractory shell of the tundish.

[0011] Preferably, the refractory shell of the intermediate ladle is internally fixedly connected with a slag-blocking dam, and both slag-blocking dams are located on one side of the corresponding slag-blocking wall.

[0012] Preferably, the refractory shell of the intermediate ladle includes a working layer, a permanent layer, a nano-insulation board, and an insulation layer. The nano-insulation board is fixedly connected to the inside of the insulation layer, the permanent layer is fixedly connected to the inside of the nano-insulation board, and the working layer is fixedly connected to the inside of the permanent layer.

[0013] Preferably, the impact pad has a U-shaped cross-section.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This continuous casting tundish with nano-insulation plate, through the cooperation of the flow divider cone, threaded column and nut, allows the molten steel to flow along the cone surface of the flow divider cone when impacting the impact pad, thereby effectively reducing the impact force per unit area. At the same time, since the cone structure can be disassembled, when it is severely worn or damaged, a new cone structure can be easily replaced without replacing the entire impact pad, thereby reducing maintenance costs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the refractory shell of the intermediate ladle of this utility model;

[0019] Figure 3 This is a schematic diagram of the flow divider cone structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the impact pad of this utility model;

[0021] Figure 5 For the present utility model Figure 2 A magnified structural diagram of point A in the middle.

[0022] Reference numerals: 1. Refractory shell of tundish; 2. Slag retaining wall; 3. Slag retaining dam; 4. Water inlet; 5. Impact pad; 6. Diverter cone; 7. Diverter groove; 8. Threaded hole; 9. Nut; 10. Threaded post; 11. Mounting groove; 12. Working layer; 13. Permanent layer; 14. Nano-insulation board; 15. Insulation layer. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Please see Figure 1-5 This utility model provides a technical solution: a continuous casting tundish with a nano-insulation plate, comprising:

[0028] The refractory shell 1 of the tundish has multiple water inlets 4 on its inner bottom wall;

[0029] The flow diversion structure is located inside the refractory shell 1 of the tundish.

[0030] The flow diversion structure includes an impact pad 5, a flow diversion cone 6, a threaded post 10, and a nut 9. The impact pad 5 is fixedly installed on the inner bottom wall of the refractory shell 1 of the tundish. A threaded hole 8 is provided on the inner bottom wall of the impact pad 5. An installation groove 11 is provided at the bottom of the impact pad 5. The installation groove 11 communicates with the interior of the threaded hole 8. The threaded post 10 is threadedly connected to the interior of the threaded hole 8. The flow diversion cone 6 is welded to the top of the threaded post 10. The bottom thread of the threaded hole 8 extends into the interior of the installation groove 11. The nut 9 is threadedly sleeved on the outer surface of the threaded post 10. The nut 9 is located inside the installation groove 11.

[0031] Multiple diversion grooves 7 are provided on the outside of the impact pad 5. All multiple diversion grooves 7 are connected to the inside of the impact pad 5. All multiple diversion grooves 7 are opened at an angle. A slag retaining wall 2 is fixedly connected inside the refractory shell 1 of the intermediate liner. A slag retaining dam 3 is fixedly connected inside the refractory shell 1 of the intermediate liner. Both slag retaining dams 3 are located on one side of the corresponding slag retaining wall 2. The cross-section of the impact pad 5 is a "U" shaped structure.

[0032] The intermediate refractory shell 1 includes a working layer 12, a permanent layer 13, a nano-insulation board 14, and an insulation layer 15. The nano-insulation board 14 is fixedly connected to the inside of the insulation layer 15, the permanent layer 13 is fixedly connected to the inside of the nano-insulation board 14, and the working layer 12 is fixedly connected to the inside of the permanent layer 13.

[0033] Furthermore, when using this device, the threaded post 10 is threaded into the threaded hole 8 by a person, and then the nut 9 is threaded into the threaded post 10, which facilitates the fixing of the diverting cone 6 inside the impact pad 5. This allows the impact pad 5 to be installed on the inner bottom wall of the refractory shell 1 of the tundish, enabling the molten steel to disperse and flow along the cone surface of the diverting cone 6 when impacting the impact pad 5, effectively reducing the impact force per unit area. Simultaneously, since the cone structure is detachable, when it suffers severe wear or damage, a new cone structure can be easily replaced without replacing the entire impact pad, thus reducing maintenance costs. The diverting channel 7 can guide and discharge the impacted molten steel. Hot plate 14 (thermal conductivity ≤0.042W / mk) is adhered inside the tundish shell as a heat insulation layer, effectively reducing heat dissipation during the casting process. Compared with the original tundish, the outer wall temperature of the tundish is reduced by more than 50℃ after the nano-insulation plate 14 is adhered. By comparison, the temperature of the ladle can be reduced by about 10℃ after the nano-insulation plate 14 is adhered (the original average temperature of the ladle was 1598℃, and the average temperature of the ladle after the nano-insulation plate 14 is adhered). The temperature drop from the ladle to the tundish during the casting process can be reduced by about 10℃ after the nano-insulation plate 14 is adhered (the original average temperature drop was about 43℃, and the average temperature drop after the nano-insulation plate 14 is about 33℃).

[0034] With the cooperation of the diversion cone 6, the threaded column 10 and the nut 9, the molten steel can be dispersed and flow along the cone surface of the diversion cone 6 when it impacts the impact pad 5, thereby effectively reducing the impact force per unit area. At the same time, since the cone structure can be disassembled, when it is severely worn or damaged, a new cone structure can be easily replaced without replacing the entire impact pad, thereby reducing maintenance costs.

[0035] Structural Description: Tundish Refractory Shell 1 and its Inner Bottom Wall Nozzle 4: The tundish refractory shell 1 is the main structure of the entire tundish, and is composed of multiple layers of refractory materials, including working layer 12, permanent layer 13, nano-insulation board 14 and insulation layer 15. These layers together provide good thermal insulation performance and erosion resistance.

[0036] Multiple nozzles 4 are opened on the inner bottom wall to distribute molten steel from the tundish to each crystallizer, thus realizing the function of molten steel diversion.

[0037] Diversion structure: Located inside the refractory shell 1 of the tundish, it mainly consists of impact pad 5, diversion cone 6, threaded column 10 and nut 9. The design of this structure is intended to optimize the flow state of molten steel in the tundish.

[0038] Impact pad 5: It is fixedly installed on the inner bottom wall of the refractory shell 1 of the tundish. Its "U"-shaped structure helps to collect and guide the molten steel. At the same time, the multiple inclined diversion grooves 7 opened on the impact pad 5 can guide the molten steel to flow in a specific direction, further promoting the diversion and uniform distribution of the molten steel.

[0039] Diverting cone 6: It is fixed to the impact pad 5 by threaded post 10 and nut 9. Its cone design helps to disperse the molten steel in all directions, reduce the direct impact of molten steel on the impact pad 5, and improve the service life of the impact pad 5.

[0040] Threaded post 10 and nut 9: enable a detachable connection between the flow divider cone 6 and the impact pad 5, facilitating the replacement and maintenance of the flow divider cone 6;

[0041] The installation of slag retaining wall 2 and slag retaining dam 3 helps to block inclusions in molten steel and prevent them from entering the crystallizer, thereby improving the cleanliness of molten steel.

[0042] The location and shape design of the slag retaining wall 2 and slag retaining dam 3 can also guide the flow path of molten steel in the tundish, prolong the residence time of molten steel in the tundish, and facilitate the flotation and removal of inclusions in the molten steel.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A continuous casting tundish having nano-thermal-plate, characterized in that, The utility model relates to a tundish refractory shell (1), the inner bottom wall of tundish refractory shell (1) is equipped with a plurality of water gap (4); The shunt structure is located in the tundish refractory shell (1); The shunt structure includes impact pad (5), shunt cone (6), threaded column (10) and nut (9), impact pad (5) is fixedly installed on the inner bottom wall of tundish refractory shell (1), the inner bottom wall of impact pad (5) is equipped with threaded hole (8), and the bottom of impact pad (5) is equipped with installation slot (11); Wherein, installation slot (11) is communicated with the inside of threaded hole (8), threaded column (10) is screw connected in the inside of threaded hole (8), shunt cone (6) is welded in the top of threaded column (10), and the bottom of threaded hole (8) is screw extended to the inside of installation slot (11); Wherein, nut (9) is screw jointed on the outer surface of threaded column (10), and nut (9) is located in the inside of installation slot (11). The outside of impact pad (5) is equipped with a plurality of shunt grooves (7), a plurality of shunt grooves (7) are communicated with the inside of impact pad (5), and a plurality of shunt grooves (7) are inclined.

2. A continuous casting tundish with nano-thermal insulation plate according to claim 1, characterized in that: The inside of tundish refractory shell (1) is fixedly connected with slag dam (2).

3. A continuous casting tundish with nano-thermal insulation plate according to claim 1, characterized in that: The inside of tundish refractory shell (1) is fixedly connected with slag dam (3), and two slag dams (3) are located on the side of corresponding slag dam (2).

4. A continuous casting tundish with nano-thermal insulation plate according to claim 1, characterized in that: The tundish refractory shell (1) includes working layer (12), permanent layer (13), nano heat insulation plate (14) and heat insulation layer (15), nano heat insulation plate (14) is fixedly connected in the inside of heat insulation layer (15), permanent layer (13) is fixedly connected in the inside of nano heat insulation plate (14), and working layer (12) is fixedly connected in the inside of permanent layer (13).

5. A continuous casting tundish with nano-thermal insulation plate according to claim 1, characterized in that: The cross section of impact pad (5) is "U” shaped structure.

6. A continuous casting tundish with nano-thermal insulation plate according to claim 1, characterized in that: ​

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