KR200285346Y1 - collecter nozzle or submerged entry nozzle for continuous casting - Google Patents
collecter nozzle or submerged entry nozzle for continuous casting Download PDFInfo
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- KR200285346Y1 KR200285346Y1 KR2020020015674U KR20020015674U KR200285346Y1 KR 200285346 Y1 KR200285346 Y1 KR 200285346Y1 KR 2020020015674 U KR2020020015674 U KR 2020020015674U KR 20020015674 U KR20020015674 U KR 20020015674U KR 200285346 Y1 KR200285346 Y1 KR 200285346Y1
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 13
- 238000007654 immersion Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 27
- 239000010959 steel Substances 0.000 abstract description 27
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
본 고안은 연속주조용 노즐 내부에 구심력을 부여하여 와류현상의 억제로 개재물 혼입 방지 및 강 품질을 향상시킴과 함께 토출유량 및 유속의 불균일로 응고 주편의 불안정, 탕면 불안정으로 주조속도 감소로 인한 생산성 저감 및 블랙아웃 (black out)사고를 방지 하는데 적합한 콜랙터노즐 또는 침지노즐에 관한 것이다.The present invention provides a centripetal force inside the nozzle for continuous casting to prevent the mixing of inclusions and improve the steel quality by suppressing vortex phenomena, as well as the uneven flow rate and flow rate, resulting in unstable solidification cast and unstable water surface. A collector nozzle or immersion nozzle suitable for abatement and blackout accidents.
이에 따른 구성은 턴디쉬(tundish)와 몰드(mold)사이 또는 래들과 턴디쉬 사이에 설치되어 사용되는 노즐에 있어서, 상기 노즐 내부에 방사선상의 원형 홈(9)이 길이 방향으로 형성하여서 됨을 특징으로 하는 연속주조용 콜랙터노즐 또는 침지노즐에 관한 기술이다.The configuration according to the present invention is characterized in that, in a nozzle installed and used between a tundish and a mold or between a ladle and a tundish, a radial circular groove 9 is formed in the nozzle in the longitudinal direction. It is a technology related to a collector nozzle or immersion nozzle for continuous casting.
Description
본 고안은 연속조조용 노즐에 관한 것으로, 보다 상세하게는 노즐 내부에 방사선상의 원형 홈을 길이 방향으로 형성시켜 구심력을 부여 함과 함께 단차를 형성시킴으로써 와류 현상 억제로 개재물 분리 증대, 강 품질의 향상 및 주조속도 상승을 통한 생산성 향상 및 안정적인 조업을 할 수 있는데 적합한 콜랙터노즐 및 침지노즐 구조에 관한 것이다.The present invention relates to a nozzle for continuous roughening, and more particularly, to form a radial circular groove in the nozzle in the longitudinal direction to give a centripetal force and to form a step, thereby increasing the separation of inclusions and improving the steel quality by suppressing the vortex phenomenon. And it relates to a collector nozzle and immersion nozzle structure suitable for improving productivity and stable operation by increasing the casting speed.
도 1은 래들로부터 턴디쉬에 용강을 주입하는 장치의 개략 단면도를 나타낸 것으로, 상기 장치는 용융된 금속을 슬라브(slab), 브룸(bloom), 빌렛트(billet)로 반제품화하는 연속주조 공정의 전단계로서, 래들(1)에서의 용강을 슬라이딩 게이트 (2)로 조절하여 콜랙터노즐(3) 및 쉬라우드 노즐(4)을 거쳐 턴디쉬(5)에 공급한다.1 shows a schematic cross-sectional view of an apparatus for injecting molten steel from a ladle into a tundish, which is a continuous casting process for semi-molding molten metal into slabs, blooms, and billets. As a previous step, the molten steel in the ladle 1 is adjusted to the sliding gate 2 and supplied to the tundish 5 via the collector nozzle 3 and the shroud nozzle 4.
상기 턴디쉬(5)(tundish)에 공급받은 용강은 턴디쉬(5)하부에 장착한 슬라이딩 게이트 (2a)를 통과하여 침지노즐(6)(submerged entry nozzle)을 거쳐 몰드(7) (mold)에 주조하게 된다.The molten steel supplied to the tundish 5 passes through a sliding gate 2a mounted under the tundish 5 and passes through a submerged entry nozzle 6 to a mold 7. Casting to
상기 콜랙터노즐(6) 또는 침지노즐(8)은 강의 연속주조시 래들(1)과 턴디쉬(5)사이 또는 턴디쉬(5)와 몰드(7)사이에 사용되어 용강의 산화방지, 용강의 와류방지에 의한 주형제 혼입을 방지하여 주조된 주편의 품질 향상에 주요한 역할을 하게 된다.The collector nozzle (6) or immersion nozzle (8) is used between the ladle (1) and tundish (5) or between tundish (5) and mold (7) during continuous casting of steel to prevent oxidation, molten steel This prevents the mixing of the casting agent by the vortex prevention, and plays a major role in improving the quality of the cast steel.
연속주조 공정에서 래들과 턴디쉬사이 또는 턴디쉬와 주형사이의 용강제어 목적으로 사용되고 있는 슬라이딩 플레이트 노즐은 도 2와 같이 사용중 개도율을 40∼50% 정도하고 있는데, 이와 같은 개도율에 따라 이를 통과한 용강은 일반 형태인 콜랙터노즐(6) 또는 침지노즐(8)을 사용하였을 때 용강이 상부노즐을 지나 슬라이딩 플레이트(2)에서 유량제어가 되면서 흐름이 바뀌어 노즐벽에 부딪힘에 따른 회전력 부여로 인해 편류가 발생되어 스프레쉬 (splash)현상을 유발하여 주조 작업 중 지금 발생의 주원인이 되고 있으며, 용강에서 재재물 혼입으로 주조 실수율을저하시킴과 함께 토출유량 및 유속의 불균일로 응고 주편의 불안정, 탕면 불안정으로 주조속도 감소로 인한 생산성 저감 및 블랙아웃(black out)사고가 발생하는 등의 문제점이 있다.The sliding plate nozzle used for the purpose of molten steel control between ladle and tundish or between tundish and mold in the continuous casting process has an opening rate of about 40 to 50% in use as shown in FIG. When molten steel is used as a collector nozzle (6) or immersion nozzle (8), which is a general type, the flow of the molten steel passes through the upper nozzle and is controlled by the sliding plate (2). Due to the drift caused by splashing, it is the main cause of the current occurrence during casting operation.It reduces casting error rate by mixing ash in molten steel and instability of solidification cast due to uneven flow rate and flow rate. There are problems such as reduced productivity and reduced blackout accidents due to reduced casting speed due to unstable water surface.
본 고안은 상기한 종래의 문제점을 해결하기 위해 안출한 것으로, 연속주조용 노즐내부에 구심력이 부여되도록 방사선상의 원형 홈을 길이방향으로 형성하여, 와류현상의 억제로 개재물 혼입 방지 및 강 품질을 향상시킴과 함께 토출유량 및 유속의 불균일로 응고 주편의 불안정, 탕면 불안정으로 주조속도 감소로 인한 생산성 저감 및 블랙아웃(black out)사고를 방지 하는데 적합한 콜랙터노즐 또는 침지노즐을 제공하고자 하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned problems, and the radial groove is formed in the longitudinal direction so that the centripetal force is applied to the nozzle for continuous casting, thereby preventing inclusions and improving steel quality by suppressing the vortex phenomenon. In addition, the present invention aims to provide a collector nozzle or immersion nozzle suitable for preventing productivity and blackout accidents due to unstable solidification cast and unstable surface due to uneven discharge flow rate and flow rate. have.
도 1은 턴디쉬에서 몰드로의 연속주조를 나터낸 개략도1 is a schematic view showing a continuous casting from a tundish to a mold
도 2는 종래의 연속주조용 노즐 사용에 따른 와류 현상을 나타낸 상태도Figure 2 is a state diagram showing the vortex phenomenon according to the conventional continuous casting nozzle used
도 3은 본 고안의 턴디쉬와 주형사이에 사용되는 침지노즐 구조도3 is a immersion nozzle structure used between the tundish and the mold of the present invention
도 4는 노즐 내부 형상에 따른 비산방지 효과를 나타낸 상태도Figure 4 is a state diagram showing the scattering prevention effect according to the internal shape of the nozzle
도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings
2, 2a : 슬라이딩 플레이트 3 : 콜랙터노즐2, 2a: sliding plate 3: collector nozzle
3a : 하부노즐 6 : 콜랙터노즐3a: Lower nozzle 6: Collector nozzle
8 : 침지노즐 C : 반원8: Immersion nozzle C: Semicircle
E : 단차 9 : 방사선상 원형 홈E: Step 9: Radial circular groove
상기 목적을 달성하기 위한 본 고안은 래들과 턴디쉬 사이 또는 턴디쉬와 주형 사이에 설치되어 사용되는 노즐에 있어서, 상기 노즐 내부에 방사선상의 원형 홈이 길이 방향으로 형성하여서 됨을 특징으로 하는 연속주조용 콜랙터노즐 또는 침지노즐로 구성된다.The present invention for achieving the above object in the nozzle used between the ladle and the tundish or between the tundish and the mold, a continuous radial groove formed in the nozzle in the longitudinal direction characterized in that It consists of a collector nozzle or an immersion nozzle.
도 3a 및 도 3b는 본 고안의 실시예를 나타낸 것으로, 도 3a는 턴디쉬와 슬라이딩 플레이트와 침지노즐이 복합된 주조장치를 나타낸 것이고, 도 3b는 침지노즐의 확대면도이다. 이에 도시된 바와 같이, 턴디쉬(5)하부에 상.하 노즐을 구비한 슬라이딩 플레이트(2a)가 설치되고, 하부노즐(3a) 하단에 침지노즐(8)을 구성한다.3A and 3B illustrate an embodiment of the present invention, and FIG. 3A illustrates a casting apparatus in which a tundish, a sliding plate, and an immersion nozzle are combined, and FIG. 3B is an enlarged side view of the immersion nozzle. As shown in the drawing, a sliding plate 2a having upper and lower nozzles is installed under the tundish 5 and an immersion nozzle 8 is formed at the lower end of the lower nozzle 3a.
상기 침지노즐(8)의 내부는 방사선상의 원형 홈(9)이 길이 방향으로 형성되어 있다. 즉, 내향으로 돌출된 요철 형상을 갖는 방사선상의 원형 홈이 길이 방향으로 형성된다. 또한 본 고안은 토출구 상부에서 길이 끝단 지점(D)에 위치한 곳에 단차(E)를 갖게 할 수 있다.In the inside of the immersion nozzle 8, a radial circular groove 9 is formed in the longitudinal direction. That is, a radial circular groove having an uneven shape projecting inwardly is formed in the longitudinal direction. In addition, the present invention can have a step (E) in the position located at the end point (D) of the length from the upper discharge port.
본 고안은 상기 방사선상의 원형 홈(9)을 노즐 내부 전체에 걸쳐 형성할 수도 있으나, 바람직하게는 단차(E)가 형성된 상단 길이에 형성함이 더욱 바람직하다.The present invention may form the circular groove 9 in the radial state over the entire inside of the nozzle, but it is more preferable to form at the top length where the step E is formed.
상기 형상을 갖는 방사선상의 원형 홈(9)을 갖는 침지노즐(9)의 내경(B)은 토출유량을 감안하여 단면적을 적정하게 설정하며 내경이 작을수록 단차 효과가 크며, 너무 작을 경우 역효과가 나타나고, 너무 클 경우는 효과가 미미하므로 상부 노즐의 0.8∼1.2배로 함이 바람직하다.The inner diameter (B) of the immersion nozzle (9) having the circular groove (9) having the shape is appropriately set the cross-sectional area in consideration of the discharge flow rate, the smaller the inner diameter, the larger the step effect, the smaller the adverse effect appears If it is too large, the effect is insignificant, so it is preferable to set it to 0.8 to 1.2 times the upper nozzle.
반원(C)의 지름은 최대 내경(A)의 1/3 이내로 하고, 최대내경(A)의 치수는 안전을 감안하여 최소두께가 20mm는 확보되어야 한다. 그리고 반원(C)의 수는 4∼6개가 적정하다. 단차(E)적용 부위는 가능한 하부에 위치하는 것이 바람직하나, 침지노즐의 수명에 절대적으로 작용하는 스래그 라인(Slag Line)에 간섭을 주지않는 토출구 상부에서 250∼300mm 길이 끝단 지점(D)에 적용하는 것이 바람직하다.The diameter of the semicircle (C) should be within one third of the maximum inner diameter (A), and the minimum inner diameter (A) should be secured with a minimum thickness of 20 mm for safety reasons. The number of semicircles C is appropriate. The step (E) application area should be located as low as possible, but it is applied to the end point (D) of 250 to 300 mm length at the top of the discharge port that does not interfere with the slag line which absolutely affects the life of the immersion nozzle. It is desirable to.
상기와 같은 형상을 갖는 본 고안은 침지노즐 내부를 통과한 용강을 중앙부로 구심력을 작용하기 위한 반구형인 국화 모양의 방사선상 원형 홈(9)을 형성함과 함께 단차(E)를 형성함으로써, 침지노즐내 용강이 구심력에 의해 각 토출공으로 용강을 균등하게 배분함과 동시에 토출공에서의 용강유속을 균일하게 한다.The present invention having the shape as described above is formed by forming a step (E) while forming a hemispherical chrysanthemum-shaped radial circular groove (9) for applying the centripetal force to the center portion of the molten steel passing through the immersion nozzle, The molten steel in the nozzle distributes the molten steel evenly to each discharge hole by the centripetal force and at the same time makes the molten steel flow rate in the discharge hole uniform.
일반적으로 용강 토출유속이 불균일한 상태에서 주조속도를 상승시킬 경우주형내 유동이 나빠지고 탕면 변동 및 몰두파우더(mold poweder)의 혼입으로 결함 발생이 쉬워진다. 그러나 본 고안의 침지노즐에 따라 침지노즐로부터 용강이 균일하게 토출되면 몰드내 용강유동을 적정한 상태로 안정화시켜 주조속도 상승이 가능해진다.In general, when the casting speed is increased while the molten steel discharge flow rate is uneven, the flow in the mold becomes poor, and the defects are easily generated due to the fluctuation of the water surface and the incorporation of a mold poweder. However, when molten steel is uniformly discharged from the immersion nozzle according to the immersion nozzle of the present invention, the molten steel flow in the mold is stabilized in an appropriate state, thereby increasing the casting speed.
도 4는 침지노즐 내부를 여러형태로 제작하여 실시한 결과를 나타낸 것으로, 원형노즐은 기존의 스트레이트 형상의 노즐로서, 스프레쉬가 크게 나타나며, 사각형 노즐은 사용중 4각 모서리 부분의 응력 발생으로 인한 균열 발생이 일어나며, 크로버형 노즐은 주조중 와류치는 용강을 효과적으로 차단하기에 부적절한 형상이다. 그러나 본 고안에서 적용하고 있는 방사선상의 원형 홈 형태를 갖는 노즐은 와류를 차단하기 위해 적정한 형상으로 나타났다.Figure 4 shows the results of manufacturing the inside of the immersion nozzle in various forms, the circular nozzle is a conventional straight-shaped nozzle, the splash appears large, the square nozzle is cracks due to the stress generated in the four corners during use This happens, and the clover-type nozzle is of an inadequate shape to effectively block molten steel during casting. However, the nozzle having a circular circular groove shape applied in the present invention appeared to have an appropriate shape to block the vortex.
이상에서와 같이 본 고안은 노즐 내부를 방사선상 원형 홈을 길이 방향으로 형성하여 용강 통과시의 회전류를 구심류로 유도 함으로써, 스프레쉬(splash)억제로 용강 주조시 노즐을 통과한 용강이 비산되어 아르곤가스 박스(argon gas ir box) 등에 부착되는 지금(地金)의 발생량을 줄일 수 있어 용강 화수율을 증대시키며, 용강강류의 구심력 증대로 턴디쉬나 주조 몰드내에서 발생하는 와류 현상을 방지하여 용강중에 혼입된 개재물의 분리부상을 향상시키므로 용강의 품질을 향상시킨다.As described above, the present invention forms a radially circular groove in the nozzle in the longitudinal direction to induce rotational flow during molten steel to a centripetal flow, thereby preventing molten steel passing through the nozzle during molten steel casting with splash suppression. It can reduce the amount of dust that is attached to argon gas ir box, etc., which increases molten steel yield and prevents vortices occurring in tundish or casting mold by increasing the centripetal force of molten steel. This improves the quality of the molten steel because it improves the separation of inclusions mixed in the molten steel.
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| KR2020020015674U KR200285346Y1 (en) | 2002-05-22 | 2002-05-22 | collecter nozzle or submerged entry nozzle for continuous casting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101044762B1 (en) * | 2003-07-22 | 2011-06-27 | 주식회사 포스코 | Tundish open nozzle to suppress molten steel vortex formation |
| KR101253898B1 (en) * | 2010-12-23 | 2013-04-16 | 주식회사 포스코 | Cooling header |
| KR20160065651A (en) * | 2014-12-01 | 2016-06-09 | 주식회사 포스코 | Top nozzle and method for removing molten metal crust using the same |
| KR20190028917A (en) * | 2017-09-11 | 2019-03-20 | 김종욱 | Controllable Apparatus of Specified Quantity of A Fluid |
-
2002
- 2002-05-22 KR KR2020020015674U patent/KR200285346Y1/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101044762B1 (en) * | 2003-07-22 | 2011-06-27 | 주식회사 포스코 | Tundish open nozzle to suppress molten steel vortex formation |
| KR101253898B1 (en) * | 2010-12-23 | 2013-04-16 | 주식회사 포스코 | Cooling header |
| KR20160065651A (en) * | 2014-12-01 | 2016-06-09 | 주식회사 포스코 | Top nozzle and method for removing molten metal crust using the same |
| KR101660772B1 (en) | 2014-12-01 | 2016-09-28 | 주식회사 포스코 | Top nozzle and method for removing molten metal crust using the same |
| KR20190028917A (en) * | 2017-09-11 | 2019-03-20 | 김종욱 | Controllable Apparatus of Specified Quantity of A Fluid |
| KR101964086B1 (en) * | 2017-09-11 | 2019-04-01 | 김종욱 | Controllable Apparatus of Specified Quantity of A Fluid |
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