CN108436071B - Spin-flow long nozzle for continuous casting - Google Patents
Spin-flow long nozzle for continuous casting Download PDFInfo
- Publication number
- CN108436071B CN108436071B CN201810576950.7A CN201810576950A CN108436071B CN 108436071 B CN108436071 B CN 108436071B CN 201810576950 A CN201810576950 A CN 201810576950A CN 108436071 B CN108436071 B CN 108436071B
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- guide rail
- spiral guide
- continuous casting
- flow
- long nozzle
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 24
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007667 floating Methods 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000003749 cleanliness Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/507—Pouring-nozzles giving a rotating motion to the issuing molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the technical field of continuous casting, and discloses a spin-flow long nozzle for continuous casting. The spiral flow guide device is a spiral guide rail, and the maximum outer diameter of the spiral guide rail is not larger than the inner diameter of the long water gap. The invention can fully exert the centrifugal effect of rotational flow continuous casting. The invention can disperse the outflow of molten steel into the tundish, reduce the impact depth, increase the upward reflux and facilitate the floating of steel slag. Is beneficial to the production of clean steel. And the residual quantity of molten steel in the ladle can be reduced, thereby being beneficial to energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the technical field of continuous casting, and particularly relates to a spin-flow long nozzle for continuous casting.
Background
Continuous casting of steel is a process of continuously cooling liquid molten steel having a certain degree of superheat into a solid cast slab having a certain shape by means of a water-cooled crystallizer. With the application and development of continuous casting technology, especially due to the higher and higher requirements of users on steel quality and the strong competition of international markets, the quality of continuous casting billets is more and more emphasized, the cleanliness of molten steel is strictly controlled, and the reduction of casting billet defects becomes an important work in continuous casting production.
In the continuous casting process, molten steel flows into the tundish from the ladle through the ladle long nozzle, and the flow of the long nozzle is determined by the opening size of the sliding nozzle. The flow rate of molten steel from the tundish to the crystallizer is controlled by a stopper rod and another sliding gate valve system. The molten steel forms a shell of primary billet in the crystallizer and gradually solidifies completely into a continuous casting billet in the underlying cooling and backup roll system. The tundish is used as the last metallurgical vessel before molten steel solidification, and plays roles of steady flow, split flow, continuous casting connection and secondary metallurgy in the continuous casting process. It is currently generally accepted that the mass of molten steel in a tundish has a close relationship with the flow field in the tundish. The reasonable tundish flow field is beneficial to floating removal of inclusions and improvement of the cleanliness of molten steel. The unreasonable tundish flow field can bring a series of problems of slag rolling, air suction, corrosion of refractory materials and the like, thereby greatly reducing the quality of molten steel and affecting the continuous casting production efficiency. The traditional tundish flow field control technology is mainly realized by virtue of the design of the self structure of the tundish, a turbulence controller (such as a retaining wall) and the like. Another method is to adopt the design of a ladle long nozzle to control the inlet flow of the tundish) so as to further control the flow field of molten steel in the tundish. The ladle long nozzle is a material resistant channel for connecting the ladle and the tundish, and plays an important role in the continuous casting process. The inlet flow of the tundish flow field determined by the ladle long nozzle directly influences the flow characteristics of the tundish inlet area, and then is pushed into the whole tundish. Therefore, besides the traditional straight barrel type long nozzle, a horn type, dissipation type and other novel nozzles are designed.
Disclosure of Invention
The invention provides a spin flow long nozzle for continuous casting, which can automatically generate a rotational flow when molten steel flows through the nozzle, fully plays the effect of rotational flow continuous casting, is not easy to block, and does not influence the generation of rotational flow even if a certain section of rotational flow guiding device breaks.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The spin flow long nozzle for continuous casting consists of long nozzle and swirl guide unit inside the long nozzle, and the swirl guide unit is spiral guide rail with maximum outer diameter not greater than the inner diameter of the long nozzle.
Further, the swirl guiding device is formed by overlapping one spiral guide rail or two or more spiral guide rails.
Further, the spiral guide rail has a variable diameter structure, and the spiral radius gradually decreases from the middle to the two ends.
Further, the length of the middle maximum spiral radius area of the spiral guide rail is 1/4 to 3/4 of the total length of the spiral guide rail.
Further, the lower portion of the nozzle is provided with a necking structure so as to facilitate clamping of the swirling flow guiding device.
Further, the swirl guiding device adopts refractory material static pressure molding.
The swirl guiding device is independently manufactured and directly placed in the long nozzle.
The long nozzle can meet the requirements of molten steel swirling flow in different directions, and if the molten steel swirling flow is clockwise, a spiral guide rail of a nozzle structure adopts clockwise spiral; the molten steel whirl is anticlockwise, and a spiral guide rail of the water gap structure adopts anticlockwise spiral.
The centrifugal device has the beneficial effect that the centrifugal effect of rotational flow continuous casting can be fully exerted. The invention can disperse the outflow of molten steel into the tundish, reduce the impact depth, increase the upward reflux and facilitate the floating of steel slag. Is beneficial to the production of clean steel. And the residual quantity of molten steel in the ladle can be reduced, thereby being beneficial to energy conservation and emission reduction.
Drawings
FIG. 1 is a schematic side view of a spin-flow nozzle according to the present invention
FIG. 2 is a top view of a spin-flow nozzle;
FIG. 3 is a schematic view of a different form of built-in swirl inducing device; (a) A variable-diameter double-spiral guide rail built-in swirl guiding device, (b) a variable-diameter single-spiral guide rail swirl guiding device, (heat transfer) a non-variable-diameter double-spiral guide rail swirl guiding device, (d) a non-variable-diameter single-spiral guide rail swirl guiding device, and (e) a non-variable-diameter multi-spiral guide rail swirl guiding device.
Detailed Description
The technical scheme is explained in detail with reference to the attached drawings and the specific embodiments.
Example 1
The inner diameter of the adopted developed long nozzle is 90mm, and the length of the nozzle is 1200mm; the maximum outer diameter of the spiral guide rail of the built-in rotational flow guide device is 90mm, the length of the spiral guide rail is 1000mm, the length of the spiral guide rail is in a non-reducing multi-spiral guide rail form, the spiral guide rail is anticlockwise spiral, and the length of the middle maximum spiral radius area of the spiral guide rail is 3/4 of the total length of the spiral guide rail.
Example 2
The inner diameter of the long nozzle is 80mm, and the length of the nozzle is 1000mm; the maximum outer diameter of the spiral guide rail of the built-in rotational flow guide device is 70mm, the length of the spiral guide rail is 700mm, the length of the spiral guide rail is in a variable-diameter double-spiral guide rail mode, the spiral guide rail spirals anticlockwise, and the length of the middle maximum spiral radius area of the spiral guide rail is 1/2 of the total length of the spiral guide rail.
Example 3
The inner diameter of the adopted long nozzle is 50mm, and the length of the nozzle is 800mm; the maximum outer diameter of the spiral guide rail of the built-in rotational flow guide device is 40mm, the length of the spiral guide rail is 700mm, the length of the spiral guide rail is in a reducing single-spiral guide rail form, the spiral guide rail spirals clockwise, and the length of the middle maximum spiral radius area of the spiral guide rail is 1/4 of the total length of the spiral guide rail.
The foregoing description is only of a preferred embodiment of the invention and is not intended to limit the scope of the invention.
Claims (3)
1. The spin flow long nozzle for continuous casting consists of a long nozzle and a swirl flow guiding device, and is characterized in that the swirl flow guiding device is arranged in the long nozzle and is a spiral guide rail, and the maximum outer diameter of the spiral guide rail is not larger than the inner diameter of the long nozzle; the spiral guide rail is of a variable diameter structure, and the spiral radius from the middle to the two ends is gradually reduced; the rotational flow guiding device is formed by overlapping one spiral guide rail or two or more spiral guide rails; the long nozzle is provided with a necking structure at the lower part so as to conveniently clamp the rotational flow guiding device.
2. A spin-flow nozzle for continuous casting according to claim 1, wherein the length of the intermediate maximum spiral radius area of the spiral guide rail is 1/4 to 3/4 of the total length of the spiral guide rail.
3. A spin-flow nozzle for continuous casting according to claim 1 or 2, wherein the swirl guiding means is formed by hydrostatic forming of refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576950.7A CN108436071B (en) | 2018-05-31 | 2018-05-31 | Spin-flow long nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576950.7A CN108436071B (en) | 2018-05-31 | 2018-05-31 | Spin-flow long nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108436071A CN108436071A (en) | 2018-08-24 |
| CN108436071B true CN108436071B (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810576950.7A Active CN108436071B (en) | 2018-05-31 | 2018-05-31 | Spin-flow long nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108436071B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523964B (en) * | 2019-09-17 | 2024-08-27 | 山东钢铁股份有限公司 | Premixing ladle long nozzle |
| CN110961616A (en) * | 2020-02-12 | 2020-04-07 | 重庆大学 | Steel ladle rotational flow generating device |
| EP3900855A1 (en) * | 2020-04-21 | 2021-10-27 | Refractory Intellectual Property GmbH & Co. KG | Rotatable insert and submerged nozzle |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108966A (en) * | 1986-10-24 | 1988-05-13 | Hiromitsu Nakagawa | Immersion nozzle of tundish |
| JPH0474820A (en) * | 1990-07-17 | 1992-03-10 | Sumitomo Metal Ind Ltd | Method for accelerating degassing of molten steel |
| CN1244376A (en) * | 1997-03-17 | 2000-02-16 | 萨考斯公司 | Device for forming helical line thrombus capable of transporting by guide tube and method for forming thrombus |
| CN1271303A (en) * | 1997-09-22 | 2000-10-25 | 丸川雄净 | Immersion nozzle |
| CN2618706Y (en) * | 2003-01-29 | 2004-06-02 | 武汉钢铁(集团)公司 | Rotary crystallizer submersed nozzle |
| CN2805995Y (en) * | 2005-06-30 | 2006-08-16 | 宝山钢铁股份有限公司 | Rotary liquid spout containing taper inner cavity |
| JP2006218488A (en) * | 2005-02-08 | 2006-08-24 | Sumitomo Metal Ind Ltd | Immersing nozzle for continuous casting, and method of continuous casting |
| JP2006346688A (en) * | 2005-06-13 | 2006-12-28 | Kurosaki Harima Corp | Long nozzle with swing flow |
| CN201082465Y (en) * | 2007-08-28 | 2008-07-09 | 宝山钢铁股份有限公司 | Immersion water gap for continuous casting |
| JP2008161921A (en) * | 2006-12-28 | 2008-07-17 | Kobe Steel Ltd | Immersed nozzle with divided type weir |
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| CN203635884U (en) * | 2013-12-27 | 2014-06-11 | 北京有色金属研究总院 | Device for manufacturing large-specification and ultrahigh-strength aluminum alloy continuous cast ingots |
| CN204073876U (en) * | 2014-08-13 | 2015-01-07 | 陈菊芳 | High sticky static fluid blender |
| CN204663420U (en) * | 2015-06-02 | 2015-09-23 | 江西中恒岩土工程技术有限公司 | A kind of layering soil compaction drilling rod |
| CN105358273A (en) * | 2013-08-05 | 2016-02-24 | 里弗雷克特里知识产权两合公司 | Refractory ceramic nozzle |
| CN106424576A (en) * | 2016-12-16 | 2017-02-22 | 东北大学 | Spiral-flow type casting device based on bottom casting |
| CN208322097U (en) * | 2018-05-31 | 2019-01-04 | 东北大学秦皇岛分校 | A kind of continuous casting spin current long nozzle |
-
2018
- 2018-05-31 CN CN201810576950.7A patent/CN108436071B/en active Active
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|---|---|---|---|---|
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| JPH0474820A (en) * | 1990-07-17 | 1992-03-10 | Sumitomo Metal Ind Ltd | Method for accelerating degassing of molten steel |
| CN1244376A (en) * | 1997-03-17 | 2000-02-16 | 萨考斯公司 | Device for forming helical line thrombus capable of transporting by guide tube and method for forming thrombus |
| CN1271303A (en) * | 1997-09-22 | 2000-10-25 | 丸川雄净 | Immersion nozzle |
| KR20010023516A (en) * | 1997-09-22 | 2001-03-26 | 가쓰키요 마루카와 | Immersion nozzle |
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| CN2805995Y (en) * | 2005-06-30 | 2006-08-16 | 宝山钢铁股份有限公司 | Rotary liquid spout containing taper inner cavity |
| JP2008161921A (en) * | 2006-12-28 | 2008-07-17 | Kobe Steel Ltd | Immersed nozzle with divided type weir |
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| Publication number | Publication date |
|---|---|
| CN108436071A (en) | 2018-08-24 |
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