CN220497761U - Tundish nozzle for continuous casting and tundish - Google Patents
Tundish nozzle for continuous casting and tundish Download PDFInfo
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- CN220497761U CN220497761U CN202321460506.1U CN202321460506U CN220497761U CN 220497761 U CN220497761 U CN 220497761U CN 202321460506 U CN202321460506 U CN 202321460506U CN 220497761 U CN220497761 U CN 220497761U
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- molten steel
- tundish
- nozzle
- continuous casting
- steel channel
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 93
- 239000010959 steel Substances 0.000 claims abstract description 93
- 239000011449 brick Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000007547 defect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009772 tissue formation Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The utility model discloses a tundish nozzle for continuous casting and a tundish, comprising a nozzle body, wherein a first molten steel channel is arranged at the inner upper part of the nozzle body and penetrates through the top of the nozzle body, a second molten steel channel is communicated below the first molten steel channel and is spirally arranged, and the second molten steel channel penetrates through the bottom of the nozzle body. According to the utility model, the second molten steel channel is arranged to form a spiral swirl structure, so that molten steel flows through the second molten steel channel to generate swirl, the quality of the continuous casting billet is improved, the design structure is relatively simple, the defects of the continuous casting billet are reduced on the premise of not influencing the production efficiency and the cost, and the rejection rate is reduced, so that the production efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of ferrous metallurgy, in particular to a tundish nozzle for continuous casting and a tundish.
Background
In the continuous casting production process, molten steel flows into a tundish from a ladle, then flows into a crystallizer through a water gap arranged at the bottom of the tundish, and finally forms a continuous casting blank. Tundish and nozzle play a critical role in the overall continuous casting process. They not only play a role in guiding the molten steel, but also can purify the molten steel to a certain extent and improve the quality of the continuous casting blank.
As shown in fig. 3, conventional continuous casting tundish nozzle designs typically employ a simple straight-through molten steel passage along which molten steel flows directly into the mold. However, there are some disadvantages to this simple design:
the impurity removal effect is not ideal: because the molten steel channel is simpler, impurities, bubbles and scum in the molten steel can not be effectively removed when flowing through the water gap, which can affect the quality of the continuous casting blank and even can cause defects on the surface of the continuous casting blank.
The molten steel flows unstably: the traditional water gap design can cause phenomena of vortex, rolling and the like in the process of molten steel entering a crystallizer, so that uniform crystallization of a continuous casting blank is not facilitated, and the unstable flow can influence the internal structure and performance of the continuous casting blank.
Temperature distribution is uneven: when molten steel flows along the molten steel channel, a local area may have a larger temperature difference, which affects the crystallization process of the continuous casting blank, and uneven temperature distribution may cause defects such as cracks, inclusions and the like of the continuous casting blank.
In response to these problems, researchers have proposed improvements such as the provision of a swirl generator, the provision of multiple stage decompression chambers, and the like. However, these solutions may present new problems in practical applications, such as increased manufacturing costs, reduced nozzle life, etc. Therefore, it is necessary to improve the existing continuous casting tundish nozzle design so as to improve the molten steel purifying effect, the flow stability and the temperature distribution uniformity on the premise of not increasing the cost and the complexity, thereby improving the quality of the continuous casting blank.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a tundish nozzle for continuous casting and a tundish.
The utility model adopts the following technical scheme to realize the aim:
the utility model provides a tundish mouth of a river for continuous casting, includes the mouth of a river body, this internal upper portion of mouth of a river is equipped with first molten steel passageway, and first molten steel passageway runs through mouth of a river body top, first molten steel passageway below intercommunication has the second molten steel passageway, the second molten steel passageway is the heliciform setting, and the second molten steel passageway runs through mouth of a river body bottom.
Further, the second molten steel channel is provided with at least one.
Further, the second molten steel channel is arranged in a non-reducing spiral mode.
Further, the swirling direction of the second molten steel channel is clockwise or anticlockwise.
Further, the first molten steel channel is arranged in a horn shape or a round table shape, and one end with a large caliber is positioned at the top of the nozzle body.
Further, a permanent layer is arranged on the inner wall of the tundish, a working layer is arranged on one side of the permanent layer, far away from the inner wall of the tundish, a nozzle pocket brick is arranged at the bottom of the tundish, the nozzle body penetrates through the nozzle pocket brick, and the bottom end of the nozzle body extends out of the nozzle pocket brick.
Further, the top of the nozzle body is higher than the working layer at the bottom of the tundish.
Compared with the prior art, the utility model provides a tundish nozzle for continuous casting and a tundish, which have the following beneficial effects:
1. according to the utility model, the second molten steel channel is arranged to form a spiral swirl structure, so that molten steel flows through the second molten steel channel to generate swirl, impurities, bubbles and scum in the molten steel can be effectively removed by the structure, and the impurity floating is facilitated, so that the quality of a continuous casting blank is improved.
2. The utility model is beneficial to slowing down the flow rate of the molten steel through the cyclone structure of the second molten steel channel, so that the molten steel can keep a more stable flowing state when entering the crystallizer, thereby being beneficial to uniform crystallization and internal tissue formation of the continuous casting billet and further improving the performance of the continuous casting billet.
3. The utility model can promote the molten steel to be fully mixed in the water gap body through the rotational flow structure of the second molten steel channel, thereby ensuring more uniform temperature distribution and being beneficial to avoiding the defects of cracks, inclusions and the like caused by temperature difference of continuous casting billets.
4. The utility model has a relatively simple design structure, does not need to be additionally provided with devices such as a cyclone generator or a multi-stage decompression chamber and the like, and does not increase the difficulty and cost of water gap manufacture, which means that the utility model can improve the quality of continuous casting billets, reduce the defects of the continuous casting billets and the rejection rate on the premise of not influencing the production efficiency and the cost, thereby improving the production efficiency.
5. The utility model has wide applicability of design structure, and can be suitable for continuous casting processes, including continuous casting billet production of various shapes such as slab, square billet, round billet and the like.
Drawings
FIG. 1 is a schematic view of the structure of a nozzle body of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
fig. 3 is a schematic cross-sectional structure of a conventional tundish and nozzle body.
The mark in the figure is 1, a nozzle body; 11. a first molten steel channel; 12. a second molten steel channel; 2. a tundish; 21. a permanent layer; 22. a working layer; 23. and a nozzle pocket block.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying positive importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the utility model provides a tundish nozzle for continuous casting, referring to fig. 1, comprising a nozzle body 1, wherein a first molten steel channel 11 is arranged at the upper part in the nozzle body 1 and is an inlet channel of molten steel, the first molten steel channel 11 penetrates through the top of the nozzle body 1, a second molten steel channel 12 is communicated below the first molten steel channel 11, the second molten steel channel 12 is spirally arranged to form a cyclone structure, so that molten steel generates cyclone when flowing through the second molten steel channel, the quality of a continuous casting blank is improved, and the second molten steel channel 12 penetrates through the bottom of the nozzle body 1.
Referring to fig. 1, in this embodiment, the upper part of the nozzle body 1 is cylindrical, the middle part is in a shape of a circular table, the diameter of the middle part is gradually reduced from top to bottom, the lower part is cylindrical, the diameter of the upper part is the same as that of the end with a large caliber of the middle part, the diameter of the lower part is the same as that of the end with a small caliber of the middle part, the whole length of the nozzle body 1 ranges from 280 mm to 350mm, the diameter of the end with a large caliber of the middle part ranges from 190mm to 230mm, the diameter of the end with a small caliber of the middle part ranges from 150mm to 190mm, the material of the nozzle body 1 adopts a common refractory material in life, and can be made of magnesium aluminum or corundum, preferably, in this embodiment, the whole length of the nozzle body 1 is 300mm, the diameter of the end with a large caliber of the upper part is 200mm, and the diameter of the end with a small caliber of the upper part is 180mm; the nozzle body 1 is formed by firing refractory materials at high temperature, and the spiral shape of the second molten steel channel 12 can be formed by pre-burying plastic parts in advance by firing at high temperature, so that the manufacturing difficulty and cost are not increased basically.
Referring to fig. 1, in this embodiment, the first molten steel channel 11 is arranged in a horn shape or a truncated cone shape, and the end with a larger caliber is located at the top of the nozzle body 1.
The first molten steel channel 11 is located at the upper part in the nozzle body 1, the whole length of the first molten steel channel 11 ranges from 30mm to 50mm, the diameter of the large-caliber end ranges from 130 mm to 170mm, the diameter of the small-caliber end ranges from 20 mm to 40mm, preferably, in the embodiment, the whole length of the first molten steel channel 11 is 40mm, the diameter of the large-caliber end is 150mm, the diameter of the small-caliber end is 30mm, and the shape and the size of the first molten steel channel 11 are designed according to the requirements of continuous casting equipment and production technology.
Referring to fig. 1, in the present embodiment, the second molten steel channel 12 is provided with at least one.
When the second molten steel channel 12 is a strip, the pipe diameter is the same as the small-caliber end of the first molten steel channel 11, and in the embodiment, referring to fig. 1, the pipe diameter of the second molten steel channel 12 is 30mm;
when the number of the second molten steel channels 12 is two or more, the second molten steel channels 12 are formed by spirally overlapping, and the number, the shape and the pipe diameter size of the second molten steel channels 12 can be adjusted according to the needs so as to optimize the flow characteristics and the purifying effect of molten steel.
Referring to fig. 1, in the present embodiment, the second molten steel channel 12 is provided in a non-reducing spiral shape.
The number of spiral turns of the second molten steel channel 12 is at least three, the diameter range of the inside of the spiral is 50-100 mm, and the spiral angle, the number of spiral turns and the diameter of the inside of the spiral of the second molten steel channel 12 can be adjusted according to actual needs so as to realize the optimal rotational flow effect; in this embodiment, referring to FIG. 1, the number of turns of the second molten steel channel 12 is three, the diameter of the inside of the spiral is 50mm, and the angle of the spiral is 45.
Referring to fig. 1, the center line of the nozzle body 1, the center line of the first molten steel channel 11, and the center line of the second molten steel channel 12 coincide.
Referring to fig. 1, in this embodiment, the swirling direction of the second molten steel channel 12 is clockwise or counterclockwise, so as to guide the flow direction of the molten steel conveniently.
Referring to fig. 2, in this embodiment, a permanent layer 21 is provided on the inner wall of the tundish 2 to insulate the molten steel and reduce the temperature drop of the molten steel in the casting process, a working layer 22 is provided on one side of the permanent layer 21 away from the inner wall of the tundish 2, so that the tundish 2 has good slag erosion and penetration resistance and molten steel and slag flushing resistance in the use process, a nozzle pocket brick 23 is provided at the bottom of the tundish 2, the nozzle body 1 passes through the nozzle pocket brick 23, and the bottom end of the nozzle body 1 extends out of the nozzle pocket brick 23.
The shape of the nozzle pocket brick 23 is a truncated cone shape or a square shape, the nozzle pocket brick 23 is made of a common refractory material in life, and can be made of magnesia-alumina or corundum; the middle part of the nozzle pocket block 23 is provided with a nozzle installation hole penetrating up and down, a nozzle body 1 is installed in the nozzle installation hole, and the shapes and the sizes of the nozzle pocket block 23 and the nozzle installation hole are designed according to the requirements of continuous casting equipment and production technology.
Referring to fig. 2, in this embodiment, the top of the nozzle body 1 is higher than the working layer 22 in the bottom of the tundish 2, so as to slow down the flow rate of molten steel flowing into the nozzle body 1 from the tundish 2, thereby reducing the impact force of molten steel on the nozzle body 1 and prolonging the service life of the nozzle body 1.
In summary, the second molten steel channel is arranged to form a spiral flow structure, so that the molten steel generates a spiral flow when flowing through the second molten steel channel, and the structure can effectively remove impurities, bubbles and scum in the molten steel, is beneficial to floating up of the impurities, and further improves the quality of continuous casting blanks; the method is beneficial to slowing down the flow rate of molten steel, so that the molten steel can keep a more stable flowing state when entering a crystallizer, uniform crystallization and internal tissue formation of a continuous casting billet are facilitated, and the performance of the continuous casting billet is further improved; the molten steel can be promoted to be fully mixed in the water gap body, so that the temperature distribution is more uniform, and the defects of cracks, inclusions and the like caused by temperature difference of continuous casting billets are avoided;
the utility model has a relatively simple design structure, does not need to be additionally provided with devices such as a cyclone generator or a multi-stage decompression chamber and the like, and does not increase the difficulty and cost of water gap manufacture, which means that the utility model can improve the quality of continuous casting blanks, reduce the defects of the continuous casting blanks and the rejection rate on the premise of not influencing the production efficiency and the cost, thereby improving the production efficiency;
the utility model has wide applicability of design structure, and can be suitable for continuous casting processes, including continuous casting billet production of various shapes such as slab, square billet, round billet and the like.
What is not described in detail in this specification is prior art known to those skilled in the art.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present utility model or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present utility model, which also falls within the scope of the present utility model.
Claims (7)
1. The utility model provides a tundish mouth of a river for continuous casting, its characterized in that, includes mouth of a river body (1), upper portion is equipped with first molten steel passageway (11) in mouth of a river body (1), and first molten steel passageway (11) run through mouth of a river body (1) top, first molten steel passageway (11) below intercommunication has second molten steel passageway (12), second molten steel passageway (12) are the heliciform setting, and second molten steel passageway (12) run through mouth of a river body (1) bottom.
2. Tundish nozzle for continuous casting according to claim 1, characterized in that the second molten steel channel (12) is provided with at least one.
3. The tundish nozzle for continuous casting according to claim 1, wherein the second molten steel channel (12) is provided in a non-reducing spiral shape.
4. Tundish nozzle for continuous casting according to claim 1, characterized in that the swirling direction of the second molten steel channel (12) is clockwise or anticlockwise.
5. Tundish nozzle for continuous casting according to claim 1, characterized in that the first molten steel channel (11) is arranged in a horn shape or a truncated cone shape, and the end with the larger caliber is positioned at the top of the nozzle body (1).
6. Tundish, characterized in that the tundish nozzle for continuous casting according to any one of claims 1-5 is included, a permanent layer (21) is arranged on the inner wall of the tundish (2), a working layer (22) is arranged on one side, far away from the inner wall of the tundish (2), of the permanent layer (21), a nozzle pocket brick (23) is arranged at the bottom of the tundish (2), the nozzle body (1) penetrates through the nozzle pocket brick (23), and the bottom end of the nozzle body (1) extends out of the nozzle pocket brick (23).
7. Tundish according to claim 6, wherein the top of the nozzle body (1) is higher than the working layer (22) at the bottom of the tundish (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460506.1U CN220497761U (en) | 2023-06-09 | 2023-06-09 | Tundish nozzle for continuous casting and tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460506.1U CN220497761U (en) | 2023-06-09 | 2023-06-09 | Tundish nozzle for continuous casting and tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220497761U true CN220497761U (en) | 2024-02-20 |
Family
ID=89872533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321460506.1U Active CN220497761U (en) | 2023-06-09 | 2023-06-09 | Tundish nozzle for continuous casting and tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220497761U (en) |
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2023
- 2023-06-09 CN CN202321460506.1U patent/CN220497761U/en active Active
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