KR20040044001A - Submerged Nozzle for Generating Multi-Flow - Google Patents

Submerged Nozzle for Generating Multi-Flow Download PDF

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Publication number
KR20040044001A
KR20040044001A KR1020020072491A KR20020072491A KR20040044001A KR 20040044001 A KR20040044001 A KR 20040044001A KR 1020020072491 A KR1020020072491 A KR 1020020072491A KR 20020072491 A KR20020072491 A KR 20020072491A KR 20040044001 A KR20040044001 A KR 20040044001A
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South Korea
Prior art keywords
molten steel
discharge port
immersion nozzle
upward
entry nozzle
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KR1020020072491A
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Korean (ko)
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KR100518278B1 (en
Inventor
박장흠
주상욱
최욱
김준식
이창현
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주식회사 포스코
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Priority to KR10-2002-0072491A priority Critical patent/KR100518278B1/en
Publication of KR20040044001A publication Critical patent/KR20040044001A/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE: A submerged entry nozzle for forming multiple molten steel flows is provided to reduce stagnation zone of molten steel by improving fluidity of molten steel in such a way that different up flows are generated in central part and side surface of flow of molten steel supplied through the submerged entry nozzle. CONSTITUTION: In a submerged entry nozzle(4) for injecting molten steel into mold from tundish in the continuous casting process, the submerged entry nozzle for forming multiple molten steel flows is characterized in that a discharge port(5) is formed at a lower part of the submerged entry nozzle in such a shape that a central part(9) of the lower surface of the discharge port has an upward inclination angle, and a side surface part(10) at left and right sides of the central part of the lower surface of the discharge port has an upward inclination angle steeper than the inclination angle of the central part of the lower surface of the discharge port so that the lower surface of the discharge port of the submerged entry nozzle is formed in multistep, wherein the upward angle of the side surface part of the discharge port of the submerged entry nozzle is 5 degrees larger than the upward angle of the central part of the discharge port of the submerged entry nozzle, wherein the central part of the discharge port of the submerged entry nozzle is formed to an upward angle of 5 degrees, and the side surface part formed at both sides of the central part of the discharge port of the submerged entry nozzle is formed to an upward angle of 10 degrees, and wherein the discharge port of the submerged entry nozzle is getting widened as it goes from the center to the outer side of the discharge port.

Description

다층 용강류 형성 침지노즐{Submerged Nozzle for Generating Multi-Flow}Submerged Nozzle for Generating Multi-Flow

본 발명은 연속주조 공정의 제강공정에서 용강을 이송하는 턴디쉬 하부에 부착되어 용강을 몰드 내로 주입시키는 침지노즐에 관한 것으로서, 더욱 상세하게는 침지노즐을 통해 공급되는 용강의 유동에 중앙부와 측면에 서로다른 상향류가 발생하도록 유동성을 개선하여 몰드내에서 용강의 정체역을 감소시킬 수 있는 다층 용강류 형성 침지노즐에 관한 것이다.The present invention relates to an immersion nozzle attached to a lower tundish for transporting molten steel in a steelmaking process of a continuous casting process to inject molten steel into a mold, and more particularly, to a central part and a side of a molten steel supplied through an immersion nozzle. The present invention relates to a multilayer molten steel forming immersion nozzle that can reduce the stagnant area of molten steel in a mold by improving fluidity so that different upflows occur.

일반적으로 연속주조 공정에서는 용강이 래들에서 턴디쉬로 이송되고, 침지노즐을 통해 턴디쉬에서 몰드로 용강을 이송해 준다. 침지노즐을 통해 몰드로 공급된 용강은 몰드내에서 일정한 유동을 형성하여, 몰드내에서 용강이 정체되는 영역없이 용강의 온도를 일정하게 유지시켜야 품질이 우수한 제품이 생상된다.In general, in the continuous casting process, the molten steel is transferred from the ladle to the tundish, and the molten steel is transferred from the tundish to the mold through the immersion nozzle. The molten steel supplied to the mold through the immersion nozzle forms a constant flow in the mold, so that the quality of the molten steel must be kept constant without a region where the molten steel is stagnated in the mold.

종래의 침지노즐의 토출구의 형상은 원형 또는 사각의 형태로 제작되고, 용강이 몰드내에서 정체역을 최소화 시키기위한 상향류 또는 하향류를 발생시키도록 토출구의 하단면이 경사지도록 형성된다. 토출구 하단의 경사는 수평, 하향 및 상향으로 구분할 수 있고, 이에 따라 도3a 내지 도3c에 도시된 바와 같이 용강내의 유동이 결정된다.The shape of the discharge port of the conventional immersion nozzle is made in the form of a circular or square, the molten steel is formed so that the bottom surface of the discharge port is inclined so as to generate an upflow or a downflow to minimize stagnant areas in the mold. The inclination of the lower end of the discharge port can be divided into horizontal, downward and upward, so that the flow in the molten steel is determined as shown in Figs. 3a to 3c.

도3a와 같이 토출구 하단의 경사가 수평이면 용강의 자중에 의해서 하향류가 혼합된 형태의 수평류가 용강내의 흐름을 지배하고, 도3b와 같이 토출구 하단의 경사가 하향이면 하향류가 용강내의 유동을 지배하며, 도3c와 같이 토출구 하단의 경사가 상향이면 상향류가 용강내의 유동을 지배한다. 수평류, 하향류, 상향류 등의 각각의 유동패턴은 장단점을 지니고 있어, 최종제품의 품질특성에 맞춰서 선별적으로 사용한다.If the slope of the lower end of the discharge port is horizontal as shown in Fig. 3A, the horizontal flow in the form of downflow mixed by the self-weight of the molten steel dominates the flow in the molten steel. When the inclination of the lower end of the discharge port is upward as shown in Fig. 3c, the upward flow dominates the flow in the molten steel. Each flow pattern such as horizontal flow, downflow, and upflow has advantages and disadvantages, and is used selectively according to the quality characteristics of the final product.

그러나, 상기와 같이 토출구 하단을 단지 경사가 상향, 하향 및 수평이 되도록 단순하게 형성하면, 필연적으로 모두 침지노즐 주위에 용강의 흐름이 없는 정체영역을 형성하게 된다. 용강 상부표면의 침지노즐 주위에 형성된 정체영역은 몰드내에서 온도가 가장 낮아서 후크가 과도하게 성장하면, 그 후크에 의해 용강에 포함된 불순물이 포집되어 연주 표면에 결합이 발생하고 이로 인하여 제품의 품질이 저하되는 문제점이 있었다.However, if the lower end of the discharge port is simply formed such that the inclination is upward, downward and horizontal as described above, inevitably all of them form a stagnant region in which no molten steel flows around the immersion nozzle. The stagnant area formed around the immersion nozzle on the upper surface of the molten steel has the lowest temperature in the mold, so if the hook grows excessively, impurities contained in the molten steel are collected by the hook, causing bonds to the playing surface, resulting in product quality. There was a problem of this deterioration.

본 발명은 상기와 같은 문제점을 해결하기 위해 발명된 것으로서, 침지노즐로부터 토출된 용강이 주 유동 방향의 좌우측으로 상향의 흐름이 발생하도록 하여 침지노즐부근으로 더 많은 용강이 공급되도록 함으로써, 용강 상부의 침지노즐 주위에 형성되는 정체역을 감소시킬 수 있는 다층 용강류 형성 침지노즐을 제공하는데 목적이 있다.The present invention has been invented to solve the above problems, the molten steel discharged from the immersion nozzle so that the upward flow occurs to the left and right sides of the main flow direction so that more molten steel is supplied near the immersion nozzle, An object of the present invention is to provide a multilayer molten steel forming immersion nozzle which can reduce the stagnant area formed around the immersion nozzle.

도1은 연속 주조 공정의 개념도.1 is a conceptual diagram of a continuous casting process.

도2는 연속 주조 공정에 사용되는 침지노즐을 나타낸 도면.2 shows an immersion nozzle used in a continuous casting process.

도3a 내지 도3c는 종래의 침지노즐 사용시 몰드내 용강의 유동 패턴을 나타낸 도면으로서, 도3a는 침지노즐의 하단면이 수평인 경우, 도3b는 하단면이 하향이 경우, 도3c는 하단면이 상향인 경우에 대하여 용강의 유동패턴을 나타낸 도면.Figure 3a to 3c is a view showing the flow pattern of the molten steel in the mold when using a conventional immersion nozzle, Figure 3a is the bottom surface of the immersion nozzle is horizontal, Figure 3b is the bottom surface is downward, Figure 3c is the bottom surface The figure which shows the flow pattern of molten steel about this upward direction.

도4는 종래의 침지노즐의 하부의 절개 사시도.Figure 4 is a cutaway perspective view of the bottom of the conventional immersion nozzle.

도5는 종래의 침지노즐을 사용하여 수모델에서 유동 형태나타낸 도면.Figure 5 is a flow diagram in the water model using a conventional immersion nozzle.

도6은 본 발명에 따른 침지노즐 하부의 절개 사시도.Figure 6 is a cutaway perspective view of the lower part of the immersion nozzle according to the present invention.

도7은 본 발명에 따른 침지노즐의 하단면의 절개 사시도.Figure 7 is a cutaway perspective view of the bottom surface of the immersion nozzle according to the present invention.

도8은 본 발명에 따른 침지노즐 하단면의 평면도.Figure 8 is a plan view of the bottom surface of the immersion nozzle according to the present invention.

도9는 본 발명에 따른 침지노즐을 사용시 몰드내의 유동 패턴을 나타낸 도면.9 is a view showing a flow pattern in the mold when using the immersion nozzle according to the present invention.

도10은 본 발명에 따른 침지노즐에 따른 몰드내의 용강의 유동 개념도.10 is a conceptual diagram of the flow of molten steel in a mold according to the immersion nozzle according to the present invention.

도11은 본 발명에 따른 침지노즐을 사용하여 수모델에서 유동 형태나타낸 도면.Figure 11 is a view showing the flow form in the water model using the immersion nozzle according to the present invention.

도12는 본 발명에 따른 침지노즐의 정체역 감소효과를 나타낸 그래프.12 is a graph showing the effect of reducing the stationary area of the immersion nozzle according to the present invention.

※ 도면의 주요 부호에 대한 설명 ※※ Explanation of main code of drawing ※

1 : 래들2 : 턴디쉬3 : 몰드1: ladle 2: tundish 3: mold

4 : 침지노즐5 : 토출구6 : 용강4: immersion nozzle 5: discharge port 6: molten steel

7 : 용강 정체구역8 : 하부면9 : 중앙부7: molten steel stagnation zone 8: lower surface 9: center portion

10 : 측면부11 : 측벽부12 : 주유동DESCRIPTION OF SYMBOLS 10 Side part 11 Side wall part 12 Main flow

13 : 측면유동13: side flow

상기와 같은 본 발명의 목적을 달성하기 위해 본 발명의 다층 용강류 형성 침지노즐은 연주 공정에서 턴디쉬로부터 몰드내로 용강을 주입시키는 침지노즐에 있어서, 상기 침지노즐의 하부에 형성된 토출구는 하부면 중앙부가 상향의 경사각을 갖도록 형성되고, 상기 하부면 중앙부 좌우측의 측면부는 상기 중앙부의 경사각보다 급한 상향의 경사각을 갖도록 형성되어, 상기 침지노즐의 토출구 하부면이 다단으로 형성된 것을 특징으로 한다.In order to achieve the object of the present invention as described above, the multilayer molten steel forming immersion nozzle of the present invention is an immersion nozzle for injecting molten steel into a mold from a tundish in a playing process, wherein the discharge port formed at the lower portion of the immersion nozzle is located at the center of the lower surface. Is formed to have an upward inclination angle, and the left and right sides of the lower surface center portion are formed to have an upward inclination angle that is sharper than the inclination angle of the central portion, and the discharge port lower surface of the immersion nozzle is formed in multiple stages.

상기 침지노즐 토출구는 측면부의 상향 각도는 중앙부의 상향 각도보다 5도 더 크게 형성되는 것을 특징으로 한다.The immersion nozzle discharge port is characterized in that the upward angle of the side portion is formed 5 degrees larger than the upward angle of the center portion.

아울러, 상기 침지노즐의 토출구는 중앙부가 상향 5도의 각도로 형성되고, 중앙부의 양측에 형성되는 측면부는 상향 10도의 각도로 형성되는 것을 특징으로 한다.In addition, the discharge port of the immersion nozzle is characterized in that the central portion is formed at an angle of 5 degrees upward, the side portions formed on both sides of the central portion is formed at an angle of 10 degrees upward.

또한, 상기 침지노즐의 토출구는 중심에서 외측으로 갈수록 넓어지도록 형성되는 것을 특징으로 하는 것을 특징으로 한다.In addition, the discharge port of the immersion nozzle is characterized in that it is formed to be wider from the center toward the outside.

이하 첨부된 도면을 이용하여 본 발명에 따른 다층 용강류 형성 침지노즐에 대하여 설명하면 다음과 같다.Hereinafter, a multilayer molten steel forming immersion nozzle according to the present invention will be described with reference to the accompanying drawings.

침지노즐 토출구(5)의 하부면은 3단으로 분할되어 중앙부(7)와 중앙부(7)의 양측의 측면부(10)로 형성된다.The lower surface of the immersion nozzle discharge port 5 is divided into three stages and is formed by the central portion 7 and the side portions 10 on both sides of the central portion 7.

도6과 도7에 도시된 바와 같이 중앙부(7)와 측면부(10)는 상향의 경사각을 가지고 형성되고, 침지노즐의 중심에서 보면 중앙부(7)보다 측면부(10)가 낮게 형성되며, 측면부(10)의 경사각은 중앙부(7)의 경사각보다 크게 형성된다. 측면부(10)의 경사각이 중앙부(7) 보다 크게 형성되어 침지노즐 토출구(5)의 중심부분에서는 중앙부(7)가 측면부(10)보다 높게 위치하지만, 외주에서는 중앙부(7)와 측면부(10)의 높이가 같아지도록 한다.As shown in FIGS. 6 and 7, the center portion 7 and the side portion 10 are formed to have an upward inclination angle, and the side portion 10 is formed lower than the center portion 7 when viewed from the center of the immersion nozzle. The inclination angle of 10 is greater than the inclination angle of the central portion 7. The inclination angle of the side portion 10 is larger than the center portion 7 so that the center portion 7 is located higher than the side portion 10 in the central portion of the immersion nozzle discharge port 5, but in the outer circumference the center portion 7 and the side portion 10 are formed. Make sure the heights are the same.

여기서, 중앙부(7)와 측면부(10)의 경사각은 다양하게 실시될 수 있으나, 바람직하게는 측면부(10)의 경사각이 중앙부(7)의 경사각보다 5도 정도 큰 각을 이루고 있는 것이 바람직하고, 또한 중앙부(7)는 5도 정도의 경사각을 이루고, 측면부(10)는 10도 정도의 경사각을 이루는 것이 바람직하다.Here, the inclination angles of the central portion 7 and the side portion 10 may be variously implemented, but preferably, the inclination angle of the side portion 10 forms an angle of about 5 degrees greater than the inclination angle of the central portion 7, In addition, the central portion 7 forms an inclination angle of about 5 degrees, and the side portion 10 preferably forms an inclination angle of about 10 degrees.

중앙부(7) 보다 측면부(10)의 경사각이 크게 형성되도록 함으로써, 침지노즐의 중앙부(7)를 통해서 배출되는 용강보다, 측면부(10)를 통해서 배출되는 용강이 중앙에 비하여 더 강한 상향류의 흐름을 얻을 수 있다.By making the inclination angle of the side portion 10 larger than the center portion 7, the upward flow of the molten steel discharged through the side portion 10 is stronger than that of the center than the molten steel discharged through the center portion 7 of the immersion nozzle. Can be obtained.

아울러, 침지노즐 토출구(5)의 하부면은 침지노즐의 중심에서 외주로 갈수록넓어지도록 형성된다. 침지노즐의 하부에 형성된 토출구(5)의 하부면은 토출구(5)의 중심에서 외주로 갈수록 넓어지도록 형성되고, 이에 따라 중앙부(9)와 측면부(10)는 중심에서 외주로 갈수로 넓어지도록 형성된다(도8).In addition, the lower surface of the immersion nozzle discharge port 5 is formed to become wider toward the outer circumference from the center of the immersion nozzle. The lower surface of the discharge port 5 formed in the lower part of the immersion nozzle is formed to be wider from the center of the discharge port 5 toward the outer circumference, and thus the central portion 9 and the side portion 10 are formed to be wider from the center to the outer circumference. (Fig. 8).

상기와 같은 구성을 갖는 본 발명에 따른 다층 용강류 형성 침지노즐의 작용에 대하여 설명하면 다음과 같다.Referring to the action of the multilayer molten steel forming immersion nozzle according to the present invention having the configuration as described above are as follows.

본 발명에 따른 다층 용강류 형성 침지노즐을 이용하여 용강을 몰드로 주입하면, 침지노즐 부근의 정체역이 감소하게 된다. 침지노즐의 토출구(5)를 통해 공급되는 용강은 토출구(5)의 중앙부분을 통해서 대부분의 용강이 상향류의 흐름을 갖도록 공급되고, 토출구(5)의 좌우측을 따라 소량의 용강이 중앙부의 주 흐름보다 강한 상향류로 공급되어 침지노즐 토출구(5)를 통해서 배출된는 용강은 전반적으로 상향류를 유동을 갖고, 특히 중앙부(7) 좌우의 측면부(10)를 통해서 배출되는 용강류의 흐름은 중앙부(7)를 통해서 배출되는 용강의 유동에 비하여 더 강한 상향류의 흐름을 갖게되어 침지노즐 중앙부(7)의 정체역이 사라진다.When molten steel is injected into the mold using the multilayer molten steel forming immersion nozzle according to the present invention, the stationary area near the immersion nozzle is reduced. The molten steel supplied through the discharge port 5 of the immersion nozzle is supplied through the center portion of the discharge port 5 so that most of the molten steel has an upflow flow, and a small amount of molten steel flows along the left and right sides of the discharge port 5. The molten steel which is supplied in an upward flow stronger than the flow and discharged through the immersion nozzle discharge port 5 has an overall upward flow, and in particular, the flow of molten steel discharged through the side portions 10 on the left and right sides of the central portion 7 is the central portion. Compared with the flow of molten steel discharged through (7), the flow of the upstream is stronger, and the stagnant area of the central part of the immersion nozzle 7 disappears.

이를 뒷받침하기 위해, 본 발명에 따른 다층 용강류 형성 침지노즐을 이용하여 수모델에서 분사한 결과를 실험한 결과와 정체역의 감소 효과를 도시하였다.In order to support this, the results of the spraying in the water model using the multilayer molten steel forming immersion nozzle according to the present invention and the effect of reducing the stagnant area are shown.

본 발명에 따른 다층 용강류 형성 침지노즐에 의한 유동은 도9 내지 도11에 도시된 바와 같이, 중앙부(7)에 의한 주흐름과 별도로 측면부(10)에 의한 강한 상향류가 형성되어 침지노즐 부근에 정체역이 생기는 것을 방지한다. 도9와 도10은 용강의 흐름을 개념화한 것이고, 도11은 수모델에서 본 발명에 따른 다층 용강류형성 침지노즐을 이용하여 용강의 유동형태를 촬영한 것이다.As shown in FIGS. 9 to 11, the flow by the multi-layer molten steel forming immersion nozzle according to the present invention is formed by a strong upflow by the side portion 10, apart from the main flow by the central portion 7. Prevents congestion 9 and 10 are conceptualized the flow of molten steel, Figure 11 is a photograph of the flow of molten steel using a multi-layered molten steel forming immersion nozzle according to the present invention in the water model.

또한, 연주 공정에서 침지노즐이 막히는 형상을 방지하기 위해 공급되는 아르곤 가스가 공급되는데, 주로 사용하는 유량4와 유량6에 대한 정체역의 길이에 대한 도표를 도12에 도시하였다. 도12는 중앙부(7)와 측면부(10)의 상향 경사 각도를 각각 0도와 5도, 5도와 10도, 10도와 15도로 하여, 이를 종래의 침지노즐과 비교한 것이다. 종래 침지노즐에 비하여, 중앙부(7)와 측면부(10)에 상향의 경사각을 형성하였을때, 정체역이 감소하는 것을 확인할 수 있다. 특히, 중앙부(7)와 측면부(10)에 각각 5도와 10도의 각도로 형성하였을 때, 정체역이 줄어드는 효과가 가장 탁월하다. 경사각을 각각 10도와 15도로 형성하였을 때는, 단순히 정체역이 줄어드는 효과만을 비교하면 탁월하지만, 과도한 상향류로 인하여 용강의 유동이 급격해져서 작업의 안정성을 저해하는 역효과가 발생할 수 있으므로, 바람직하게 중앙부(7)는 상향 5도의 경사각을 갖고, 측면부(10)는 상향 10도의 경사각을 갖도록 한다.In addition, argon gas is supplied to prevent the shape of the immersion nozzle from being clogged in the playing process. A diagram of the length of the stationary region for the flow rate 4 and the flow rate 6 mainly used is shown in FIG. FIG. 12 shows the inclination angles of the center portion 7 and the side portion 10 at 0 degrees, 5 degrees, 5 degrees, 10 degrees, 10 degrees and 15 degrees, respectively, compared with the conventional immersion nozzles. Compared with the conventional immersion nozzle, when the inclination angle of the upper portion is formed in the central portion 7 and the side portion 10, it can be seen that the stagnant area is reduced. In particular, when formed in the central portion 7 and the side portion 10 at an angle of 5 degrees and 10 degrees, the effect of reducing the congestion area is most excellent. When the inclination angle is formed at 10 degrees and 15 degrees, respectively, it is excellent to compare only the effect of reducing the stationary area, but since the upflow of molten steel may occur due to excessive upflow, the adverse effect of impairing the stability of the operation may occur. 7) has an inclination angle of 5 degrees upward, and the side portion 10 to have an inclination angle of 10 degrees upward.

상기와 같은 구성과 작용을 갖는 본 발명의 다층 용강류 형성 침지노즐은 다음과 같은 효과를 가지고 있다.The multilayer molten steel forming immersion nozzle of the present invention having the configuration and action as described above has the following effects.

상향의 경사각을 갖는 침지노즐 토출구의 중앙부 통해서 대부분의 용강이 상향류의 흐름을 갖도록 공급되고, 토출구의 측면부를 통해서 나머지 용강이 더 강한 상향류의 흐름을 갖도록 하여 용강상부의 침지노즐 쪽으로 흐름이 발생하도록 하여 용강 상부의 침지노즐 주위의 정체역이 현저히 감소된다.Most of the molten steel is supplied to have an upward flow through the center of the immersion nozzle discharge port having an upward inclination angle, and flow is generated toward the immersion nozzle of the upper part of the molten steel so that the remaining molten steel has a stronger upstream flow through the side of the discharge port. The stagnant area around the immersion nozzle in the upper part of the molten steel is significantly reduced.

Claims (4)

연주 공정에서 턴디쉬로부터 몰드내로 용강을 주입시키는 침지노즐에 있어서,In the immersion nozzle for injecting molten steel into the mold from the tundish in the playing process, 상기 침지노즐의 하부에 형성된 토출구는 하부면 중앙부가 상향의 경사각을 갖도록 형성되고,The discharge port formed in the lower portion of the immersion nozzle is formed so that the lower surface center portion has an upward inclination angle, 상기 하부면 중앙부 좌우측의 측면부는 상기 중앙부의 경사각보다 급한 상향의 경사각을 갖도록 형성되어,Side surfaces of the left and right sides of the lower surface center portion are formed to have an upward inclination angle that is steeper than that of the central portion. 상기 침지노즐의 토출구 하부면이 다단으로 형성된 것을 특징으로 하는 다층 용강류 형성 침지노즐.Multi-layered molten steel forming immersion nozzle, characterized in that the lower surface of the discharge port of the immersion nozzle is formed in multiple stages. 제1항에 있어서,The method of claim 1, 상기 침지노즐 토출구는 측면부의 상향 각도는 중앙부의 상향 각도보다 5도 더 크게 형성되는 것을 특징으로 하는 다층 용강류 형성 침지노즐.The immersion nozzle discharge port is a multi-layer molten steel forming immersion nozzle, characterized in that the upward angle of the side portion is formed 5 degrees greater than the upward angle of the center portion. 제1항에 있어서,The method of claim 1, 상기 침지노즐의 토출구는 중앙부가 상향 5도의 각도로 형성되고, 중앙부의 양측에 형성되는 측면부는 상향 10도의 각도로 형성되는 것을 특징으로 하는 다층용강류 형성 침지노즐.The discharge hole of the immersion nozzle is a multi-layered steel stream forming immersion nozzle, characterized in that the central portion is formed at an angle of 5 degrees upward, the side portions formed on both sides of the central portion are formed at an angle of 10 degrees upward. 제1항 내지 제3항의 어느 한 항에 있어서,The method according to any one of claims 1 to 3, 상기 침지노즐의 토출구는 중심에서 외측으로 갈수록 넓어지도록 형성되는 것을 특징으로 하는 것을 특징으로 하는 다층 용강류 형성 침지노즐.The discharge hole of the immersion nozzle is a multi-layer molten steel forming immersion nozzle, characterized in that is formed to be wider toward the outside from the center.
KR10-2002-0072491A 2002-11-20 2002-11-20 Submerged Nozzle for Generating Multi-Flow KR100518278B1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN102441651A (en) * 2011-12-07 2012-05-09 鞍钢股份有限公司 Method for judging and handling steel channeling on junction surface of submerged nozzle

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JPS558265B2 (en) * 1974-05-14 1980-03-03
JPS5257023A (en) * 1975-11-06 1977-05-11 Kawasaki Steel Co Immersion nozzle in continuous casting
JPS5426338Y2 (en) * 1975-11-11 1979-08-31
JPS5932440Y2 (en) * 1981-06-26 1984-09-11 川崎製鉄株式会社 Immersion nozzle of continuous casting machine
JPH0120052Y2 (en) * 1985-07-08 1989-06-12

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102441651A (en) * 2011-12-07 2012-05-09 鞍钢股份有限公司 Method for judging and handling steel channeling on junction surface of submerged nozzle
CN102441651B (en) * 2011-12-07 2015-11-18 鞍钢股份有限公司 A kind of soaking water gap faying face alters the determination processing method of steel

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