CN217121736U - Immersion type water gap for continuous casting - Google Patents
Immersion type water gap for continuous casting Download PDFInfo
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- CN217121736U CN217121736U CN202220627851.9U CN202220627851U CN217121736U CN 217121736 U CN217121736 U CN 217121736U CN 202220627851 U CN202220627851 U CN 202220627851U CN 217121736 U CN217121736 U CN 217121736U
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- continuous casting
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- conservancy diversion
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Abstract
The utility model belongs to the technical field of refractory material for the continuous casting, concretely relates to immersion nozzle for continuous casting, including mouth of a river body, mouth of a river body include from last to the bowl mouth portion that connects gradually down, with footpath portion, first reducing portion and second reducing portion, second reducing portion in set up the water conservancy diversion separation block, with the limited entry hole of footpath portion inner wall, the bottom that the entry extended to first reducing portion be connected with the water conservancy diversion separation block, the water conservancy diversion separation block on seted up the steady flow hole. The water gap is improved on the existing basis, the fluctuation of the liquid level of the crystallizer can be effectively reduced, and the continuous casting effect can be fully exerted.
Description
Technical Field
The utility model belongs to the technical field of refractory material for the continuous casting, concretely relates to immersion nozzle for continuous casting.
Background
The continuous casting of steel is a process of continuously cooling liquid steel with a certain superheat degree into a solid casting blank with a certain shape through a water-cooled crystallizer. With the application and development of continuous casting technology, especially because of the higher and higher requirements of users on the quality of steel and the intense competition of international markets, the quality of continuous casting billets is more and more emphasized, and the important work in continuous casting production is to strictly control the cleanliness of molten steel and reduce the defects of the casting billets.
The crystallizer, as the "heart" of the continuous casting machine, is the origin of most surface defects and internal quality problems of the continuous casting slab. Statistics show that nearly 80% of surface defects of a casting blank originate from a crystallizer, and the surface defects are the last ring for controlling the quality of molten steel in various process links of continuous casting and determine the surface quality of the casting blank and the content and distribution of non-metallic inclusions. The flowing state of the molten steel in the crystallizer directly influences the quality of the casting blank and the content and distribution of the non-metallic inclusions. At present, the method for improving the flow of molten steel in the crystallizer mainly comprises the technologies of electromagnetic stirring, electromagnetic braking and the like of the crystallizer, and as the crystallizer is made of a water-filled copper plate, a magnetic field is shielded by the copper plate and can be greatly attenuated, so that the action and the efficiency of the electromagnetic field are seriously influenced.
The submerged entry nozzle (submerged entry nozzle) is a refractory pouring sleeve installed at the bottom of a tundish in continuous steel casting equipment and inserted below the liquid level of molten steel in a crystallizer, and in the continuous casting process, the molten steel after refining is treated by the tundish and then is continuously injected into the crystallizer through the submerged entry nozzle to be cooled and solidified. The submerged nozzle protects the molten steel flow, prevents the molten steel from secondary oxidation, and simultaneously changes the flowing state of the molten steel in the crystallizer, and the flowing in the continuous casting crystallizer also has great influence on the quality and the yield of the continuous casting blank. The uneven discharge amount of the molten steel of each discharge hole caused by the bias flow of the molten steel in the immersion nozzle causes the fluctuation of the liquid level in the crystallizer, the defect of slag entrapment is easily formed, and the intensity of the fluctuation of the liquid level is aggravated along with the improvement of the continuous casting pulling speed, so the implementation of high-speed continuous casting is limited, and the greater economic benefit cannot be obtained. It is also very important that: because the upper corner of the discharge hole of the existing submerged nozzle is easy to limit the flowing of molten steel to form a negative pressure area, the molten steel and the protective slag are sucked and flow into the crystallizer along with the main flow of the molten steel again, the content of non-metallic inclusions in the molten steel is increased, and the casting blank quality is badly influenced.
Basic research shows that the rotary flow of molten steel in a continuous casting immersion nozzle can effectively improve the uniformity and stability of the outlet flow of the nozzle, improve the flow state and temperature distribution in a crystallizer and reduce the meniscus liquid level fluctuation in the crystallizer; however, the swirl flow in the nozzle has an excellent influence on the flow of the molten steel in the crystallizer, and also has an adverse influence on the flow of the molten steel in the crystallizer, such as an increase in impact on the wide surface of the crystallizer. The prior submerged nozzle for continuous casting can not inhibit the adverse effect of the rotational flow in the nozzle on the flowing of the molten steel in the crystallizer, and can not completely meet the requirement of the rotational flow continuous casting in the nozzle.
Disclosure of Invention
An object of the utility model is to provide a immersion nozzle for continuous casting to the problem that exists among the prior art, this mouth of a river improves on current basis, can effectively reduce the crystallizer liquid level undulant, can the effect of full play continuous casting.
The technical scheme of the utility model is that:
the utility model provides an immersion nozzle for continuous casting, includes the mouth of a river body, the mouth of a river body include from last bowl mouth portion, with footpath portion, first variable diameter portion and the second variable diameter portion that connects gradually down, second variable diameter portion in set up the water conservancy diversion spacer block, with the limited entry hole of footpath inner wall, the entry hole extend to the bottom and the water conservancy diversion spacer block of first variable diameter portion and be connected, the water conservancy diversion spacer block on seted up steady flow hole.
Specifically, the flow stabilizing hole horizontally penetrates through the flow guide separation block.
Specifically, the upper part of the flow guide separation block is propped against the bottom of the inlet hole on the inner side of the first reducing part.
Specifically, the flow stabilizing hole is positioned at the middle lower part of the flow guide separating block.
Specifically, the hole diameter of the outlet parts at two ends of the flow stabilizing hole is larger than that of the middle hole.
The utility model has the advantages that: the utility model discloses an improvement to current mouth of a river, be connected the bottom of inlet hole directly with the water conservancy diversion separation block, remove the interval between inlet hole and the water conservancy diversion separation block, reducible molten steel that gets into from the inlet hole is to the impact of water conservancy diversion separation block, and set up the stationary flow hole on the water conservancy diversion separation block, the stationary flow hole has the effect of drainage and stationary flow concurrently, can disperse the molten steel of water conservancy diversion separation block both sides through the stationary flow hole, the volume of gushing water of the export of water conservancy diversion separation block both sides has been balanced, consequently, further can prevent to appear the undulant phenomenon of liquid level because of the volume of gushing water greatly. This use novel improvement that provides can even the mouth of a river effluence, reduce the crystallizer liquid level fluctuation, prevent being drawn into of covering slag, effect that can full play continuous casting.
Drawings
Fig. 1 is a schematic cross-sectional view of a submerged entry nozzle provided in the present invention;
fig. 2 is a schematic side sectional view of a submerged nozzle provided in the present invention.
1 same diameter part, 2 first diameter-changing part, 3 inlet hole, 4 second diameter-changing part, 5 diversion separation block,
6 flow stabilizing holes.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, the submerged nozzle for continuous casting includes a nozzle body, the nozzle body includes a bowl portion, a same-diameter portion 1, a first diameter-changing portion 2 and a second diameter-changing portion 4, which are sequentially connected from top to bottom, a diversion separation block 5 is disposed in the second diameter-changing portion 4, an inlet hole is defined in an inner wall of the same-diameter portion 1, the inlet hole extends to the bottom of the first diameter-changing portion 2 and is connected with the diversion separation block 5, and the upper portion of the diversion separation block 5 abuts against the bottom of the inlet hole inside the first diameter-changing portion 2. The flow guide separation block 5 is provided with a flow stabilizing hole 6. The flow stabilizing hole 6 horizontally penetrates through the flow guide separation block 5.
The flow stabilizing hole 6 is positioned at the middle lower part of the flow guide separation block 5. The diameter of the outlet part at the two ends of the flow stabilizing hole 6 is larger than that of the middle part.
The utility model discloses an improvement to current mouth of a river, directly be connected the bottom of inlet hole with the water conservancy diversion separation block to set up steady flow hole on the water conservancy diversion separation block, the molten steel is direct with its reposition of redundant personnel through the water conservancy diversion separation block when leaving from the inlet hole, set up steady flow hole simultaneously on the water conservancy diversion separation block, in order to avoid the molten steel the condition of velocity of flow imbalance to appear in mouth of a river exit, it is undulant to reduce the crystallizer liquid level, can even the mouth of a river play, prevent being drawn into of mold powder, the effect of full play continuous casting.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (5)
1. The utility model provides an immersion nozzle for continuous casting, includes the mouth of a river body, the mouth of a river body include from last bowl mouth portion, with footpath portion (1), first variable diameter portion (2) and second variable diameter portion (4) that connect gradually down, second variable diameter portion (4) in set up water conservancy diversion separating block (5), inject inlet hole (3) with footpath portion (1) inner wall, its characterized in that, inlet hole (3) extend to the bottom and the water conservancy diversion separating block (5) of first variable diameter portion (2) and be connected, water conservancy diversion separating block (5) on seted up steady flow hole (6), inlet hole (3) exit be the shape of falling the ladder.
2. Submerged entry nozzle according to claim 1, characterised in that said flow-stabilizing holes (6) extend horizontally through said flow-guiding and separating block (5).
3. The submerged entry nozzle for continuous casting according to claim 1, characterized in that the upper portion of the flow guide separation block (5) abuts against the bottom of the inlet hole inside the first diameter-variable portion (2).
4. The submerged entry nozzle for continuous casting according to claim 1, characterized in that the flow-stabilizing hole (6) is located in the lower middle portion of the flow-guiding separation block (5).
5. The submerged entry nozzle for continuous casting according to claim 1, characterized in that the orifice diameter of the outlet portion at both ends of the steady flow orifice (6) is larger than the orifice diameter at the middle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627851.9U CN217121736U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627851.9U CN217121736U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217121736U true CN217121736U (en) | 2022-08-05 |
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ID=82644347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220627851.9U Active CN217121736U (en) | 2022-03-21 | 2022-03-21 | Immersion type water gap for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217121736U (en) |
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2022
- 2022-03-21 CN CN202220627851.9U patent/CN217121736U/en active Active
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