KR20040034212A - Device of preventing tundish vortex and impurities flowing into mold - Google Patents

Device of preventing tundish vortex and impurities flowing into mold Download PDF

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Publication number
KR20040034212A
KR20040034212A KR1020020064300A KR20020064300A KR20040034212A KR 20040034212 A KR20040034212 A KR 20040034212A KR 1020020064300 A KR1020020064300 A KR 1020020064300A KR 20020064300 A KR20020064300 A KR 20020064300A KR 20040034212 A KR20040034212 A KR 20040034212A
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South Korea
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tundish
molten steel
vortex
screw rod
mold
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KR1020020064300A
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Korean (ko)
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정득식
허춘행
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주식회사 포스코
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Priority to KR1020020064300A priority Critical patent/KR20040034212A/en
Publication of KR20040034212A publication Critical patent/KR20040034212A/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
    • 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
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE: A device for preventing vortex and inflow of impure inclusions into tundish mold is provided to improve quality of product and reduce manufacturing cost by excluding outflow of impure inclusions into mold due to vortex of molten steel in tundish and naturally preventing outflow of impure inclusions floated on upper part of molten steel into the mold. CONSTITUTION: The device comprises a screw rod(10) an upper part of which is formed in a cylindrical shape, and in which screw is formed on a part of the screw rod that is dipped into molten steel in a reverse direction of vortex so that the screw rod is dipped into molten steel(2) in tundish(1) in the casting process to suppress generation of vortex in molten steel; and a fixing rube(11) insertingly fixed to an upper part of the screw rod and closely adhered to crater cover(8) installed in an upper part of the tundish to fix the screw rod flown in the tundish, wherein the screw rod comprises an upside-down truncated conical check ball(12) inserted onto the screw rod so that the check ball is lowered or lifted according to level of molten steel as it is being floated on the surface of molten steel, and the check ball closes submerged nozzle(5) on a lower part of tundish at a discharge completion time point of molten steel.

Description

턴디쉬 와류 및 불순개재물 혼입방지장치{DEVICE OF PREVENTING TUNDISH VORTEX AND IMPURITIES FLOWING INTO MOLD}DEVICE OF PREVENTING TUNDISH VORTEX AND IMPURITIES FLOWING INTO MOLD}

본 발명은 스테인레스 강 및 기타 강의 주조작업에 있어서 턴디쉬 내부에서 발생되는 와류현상과 불순개재물의 몰드내 유입을 방지하는 장치에 관한 것으로, 보다 상세하게는 턴디쉬 내부의 용강이 몰드내로 유입되는 과정에서 불가피하게 발생되는 와류현상으로 인하여 턴디쉬 상부에 분리부상되어 있는 불순개재물이 몰드내로 유입되는 것을 방지함으로써 스테인레스 강의 생명이라 할 수 있는 광택을 그대로 살려내고 치명적인 흠이라 할 수 있는 슬리버(sliver) 발생을 억제하는 턴디쉬 와류 및 불순개재물 혼입방지장치에 관한 것이다.The present invention relates to a device for preventing the vortex phenomena generated in the tundish and the inflow of the impurity inclusion in the mold in the casting operation of stainless steel and other steels, and more specifically, the molten steel in the tundish is introduced into the mold Due to the inevitable vortex phenomenon, the impurity separated in the upper part of the tundish is prevented from flowing into the mold, thereby making it possible to save the sliver, which is a fatal flaw, and preserve the gloss, which is the life of stainless steel. The present invention relates to a tundish vortex and an impurity incorporation preventing device for suppressing.

종래의 기술을 도 1을 참조하여 설명하면 다음과 같다.The prior art is described with reference to FIG. 1 as follows.

일반적으로, 용강(2)을 주조하는 과정에서 턴디쉬(1) 내부의 용강(2) 중에 잔존되어 있는 불순개재물(6)을 분리하기 위해 각종의 턴디쉬파우더들이 사용되며 이로써 각종 불순개재물(6)은 그 비중이 용강(2)보다 작으므로 용강(2) 상부로 부상된다.In general, a variety of tundish powders are used to separate the impurity inclusions 6 remaining in the molten steel 2 inside the tundish 1 in the process of casting the molten steel 2, whereby various impurity inclusions 6 ) Is floated above the molten steel (2) because its specific gravity is less than the molten steel (2).

상기 불순개재물(6)이 용강(2)의 상부에 위치된 채로 용강(2)이 침지노즐(5)을 통과하여 몰드(7)에 유입될 때 상기 턴디쉬(1) 내부에는 불가피하게 와류(3)가 발생되는데 이는 넓은 곳에서 적은 곳으로 유체가 이동될 때 소용돌이가 발생되는 원리와 동일하다.When the molten steel 2 flows through the immersion nozzle 5 and enters the mold 7 while the impurity inclusion 6 is positioned above the molten steel 2, the tungsten 1 inevitably has a vortex ( 3) occurs, which is the same principle that the vortex occurs when the fluid moves from a large place to a small place.

따라서, 턴디쉬(1) 하부의 침지노즐(5)을 통하여 용강(2) 유출이 이루어지는 과정에서 용강(2) 상부에 부상되어 있던 불순개재물(6)이 상기 와류(3)에 의해 용강(2)과 함께 유출된다.Therefore, the impurity inclusion 6 which floated on the upper part of the molten steel 2 in the course of the outflow of the molten steel 2 through the immersion nozzle 5 under the tundish 1 is melted by the vortex 3. Out)

또한, 상기 용강(2)이 턴디쉬(1)로부터 몰드(7)로 유출되는 과정에서 발생되는 불순개재물(6) 유출은 별론으로 하고, 상기 용강(2) 유출작업이 완료되는 시점에서 슬라이딩 게이트(4)를 닫아 용강(2)만 유출시키고 불순개재물(6)의 유출을 막아야 하지만 그 폐쇄시점을 정확히 포착하는 것이 어려운 관계로 부득이 불순개재물(6)이 몰드(7) 내로 유입되는 심각한 문제를 안고 있다.In addition, the outflow of the impurity inclusions 6 generated during the flow of the molten steel 2 from the tundish 1 to the mold 7 is separately described, and the sliding gate at the time point at which the molten steel 2 flows out is completed. (4) should be closed to leak only molten steel (2) and prevent the outflow of impurity inclusions (6). However, it is difficult to accurately capture the closing point, so serious problems that impurity inclusions (6) flow into mold (7) are inevitable. Holding it.

결국, 상기 불순개재물(6)이 몰드(7) 내로 유입됨으로 인하여 상기 작업 이후에 생산되는 제품의 품질에 치명적인 결함을 발생시키는 중대한 원인을 제공하고 있다.As a result, the impurity inclusion 6 is introduced into the mold 7, thereby providing a significant cause of a fatal defect in the quality of the product produced after the operation.

본 발명은 상술한 바와 같은 종래 기술이 갖는 제반 문제점을 감안하여 이를 해결하고자 창출한 것으로, 주조작업의 턴디쉬 내부 용강에서 발생되는 와류현상으로 인한 불순개재물의 몰드내 유출을 배재하고 용강유출이 완료되는 시점에서 용강의 상부에 부유되던 불순개재물의 몰드내 유출을 방지함으로써 이후 생산되는 제품의 결함요인을 사전에 제거하도록 개선된 턴디쉬 와류 및 불순개재물 혼입방지장치를 제공함에 그 목적이 있다.The present invention was created in view of the above-described problems of the prior art as described above, and solves this problem, excluding the outflow of the impurity inclusions in the mold due to the eddy current generated in the molten steel inside the tundish of the casting operation and the molten steel outflow is completed It is an object of the present invention to provide an improved tundish vortex and impurity incorporation preventing device to prevent defects in the product produced in advance by preventing the outflow of the impurity inclusion floating on the upper part of the molten steel at a time point.

도 1은 종래 기술에 따른 턴디쉬 내부의 와류발생상태도;1 is a vortex generation state inside the tundish according to the prior art;

도 2는 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 스크류봉 사시도;Figure 2 is a perspective view of the screw rod of the tundish vortex and impurities inclusion prevention device according to the present invention;

도 3은 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 체크볼 사시도(a)와 평면도(b);Figure 3 is a perspective view (a) and plan view (b) of the tumbled dish vortex and impurities inclusion prevention device according to the present invention;

도 4는 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 사시도도;Figure 4 is a perspective view of a tundish vortex and impurities inclusion prevention apparatus according to the present invention;

도 5는 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치에 의한 와류소멸상태도;5 is a vortex disappearance state diagram by the tundish vortex and the impurity inclusion mixing prevention device according to the present invention;

도 6은 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치에 의한 작업종료상태도.Figure 6 is a state of completion of work by the tundish vortex and impurities inclusion prevention device according to the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 턴디쉬 2 : 용강 3 : 와류1: tundish 2: molten steel 3: vortex

4 : 슬라이딩 게이트 5 : 침지노즐 6 : 불순개재물4 sliding gate 5 immersion nozzle 6 impurity inclusion

7 : 몰드 8 : 화구커버 10 : 스크류봉7: mold 8: crater cover 10: screw rod

11 : 고정용튜브 12 : 체크볼 13 : 삽입홀11 fixing tube 12 check ball 13 insertion hole

본 발명의 상기한 목적은 주조작업의 턴디쉬 내부 용강에 잠겨서 용강내 와류발생을 억제하도록 상부는 원통형으로 형성되고 용강내 함입되는 부분은 와류의 역방향으로 스크류가 형성된 스크류봉과;The above object of the present invention is a screw rod formed in the upper portion is formed in a cylindrical shape and the inside of the molten steel screwed in the reverse direction of the vortex so as to be locked in the tundish inner molten steel of the casting operation to suppress the generation of vortex in the molten steel;

상기 스크류봉의 상부에 삽입고정되고 상기 턴디쉬 상부에 설치된 화구커버에 밀착되어 턴디쉬 내부로 유입되는 스크류봉을 고정시키는 고정용튜브로 구성되는 것을 특징으로 하는 턴디쉬 와류 및 불순개재물 혼입방지장치를 제공함에 의해 달성된다.The tundish vortex and the impurity inclusion prevention device, characterized in that consisting of a fixing tube for fixing the screw rod that is inserted into the top of the screw rod and is in close contact with the crater cover installed on the top of the tundish into the tundish; By providing.

이하에서는 첨부도면을 참조하여 본 발명을 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 스크류봉 사시도이고, 도 3본 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 체크볼 사시도(a)와 평면도(b)이며, 도 4본 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치의 사시도이다.Figure 2 is a perspective view of the screw rod of the tundish vortex and impurities inclusion prevention apparatus according to the invention, Figure 3 check ball perspective view (a) and plan view (b) of the tundish vortex and impurities inclusion prevention apparatus according to the present invention 4 is a perspective view of a tundish vortex and an impurity inclusion mixing prevention device according to the present invention.

상기 도면에 따르면, 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치는 도 5에서 도시되는 턴디쉬(1) 상부 화구커버(8)에 삽입되어 턴디쉬(1) 내의 용강(2) 내부로 직접 투입된다.According to the drawings, the tundish vortex and the impurity inclusion prevention device according to the present invention is inserted into the upper cradle cover (8) of the tundish (1) shown in Figure 5 into the molten steel (2) in the tundish (1) It is injected directly.

상기 턴디쉬 와류 및 불순개재물 혼입방지장치의 주축을 이루는 부분은 스크류봉(10)으로서 그 상부는 원통의 형상을 이루고 있으며 일정부분 이하로는 스크류가 형성된다.The main portion of the tundish vortex and the impurity inclusion mixing prevention device is a screw rod 10, the upper portion of which forms a cylindrical shape, and a screw is formed below a predetermined portion.

아울러, 스크류봉에 형성된 스크류의 방향은 주조작업에 사용되는 턴디쉬의 구조에 따라서 와류발생방향이 달라지므로 그 구조에 따라서 와류발생방향의 역방향으로 설계해야한다.In addition, since the direction of vortex generation varies depending on the structure of the tundish used in the casting operation, the direction of the screw formed on the screw rod should be designed in the reverse direction of the vortex generation direction according to the structure.

상기 일정부분은 스크류봉(10)이 용강(2) 내부로 최대한 잠길 경우 그 용강(2)수위보다 높은 곳에 위치된다.The predetermined portion is located in the molten steel (2) higher than the water level when the screw rod 10 is maximally locked into the molten steel (2).

상기 스크류봉(10)의 상부에는 고정용튜브(11)가 삽입고정되며 스크류봉(10)이 턴디쉬(1) 내부로 삽입되었을 때 상기 고정용튜브(11)가 상기 화구커버(8)에 밀착됨으로써 스크류봉(10)을 고정시킨다.The fixing tube 11 is inserted and fixed to the upper portion of the screw rod 10 and the fixing tube 11 is inserted into the crater cover 8 when the screw rod 10 is inserted into the tundish 1. The screw rod 10 is fixed by being in close contact.

상기 스크류봉(10)의 고정용튜브(11) 하부로 체크볼(12)이 삽입되며 이는 뒤집힌 절두원뿔 형상으로 그 중앙에 스크류봉(10)이 삽입되어 이동될 수 있도록 삽입홀(13)이 형성된다.The check ball 12 is inserted into the lower fixing tube 11 of the screw rod 10, which is an inverted truncated cone shape, and the insertion hole 13 is inserted so that the screw rod 10 is inserted into the center thereof. Is formed.

이러한 구성으로 이루어진 본 발명의 작동관계를 참조하여 설명하면 다음과 같다.Referring to the operation relationship of the present invention made of such a configuration as follows.

도 5는 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치에 의한 와류소멸상태도이고, 도 6은 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치에 의한 작업종료상태도이다.5 is a vortex dissipation state diagram by the tundish vortex and impurities inclusion prevention apparatus according to the present invention, Figure 6 is a work finished state diagram by the tundish vortex and impurities inclusion prevention apparatus according to the present invention.

상기 도면에 따르면, 주조작업에 있어서 턴디쉬(1) 내부의 용강(2) 상부에는 불순개재물(6)이 부유되어 있고 종래에 발생되던 와류(3)는 소멸된다.According to the figure, in the casting operation, the impurity inclusion 6 is suspended above the molten steel 2 inside the tundish 1, and the vortex 3, which has conventionally been generated, disappears.

이는, 본 발명에 따른 턴디쉬 와류 및 불순개재물 혼입방지장치가 설치되지 않았던 종래의 경우와 현저한 차이를 보이는데 그 이유는 용강(2)내에서 발생되는 와류(3)의 방향과 역시 용강(2)내에 설치되는 스크류봉(10)의 스크류 방향이 서로 역방향 관계를 갖기 때문이다.This shows a remarkable difference from the conventional case where the tundish vortex and the impurity inclusion preventing device according to the present invention are not installed because of the direction of the vortex 3 generated in the molten steel 2 and also the molten steel 2. This is because the screw directions of the screw rods 10 installed therein have a reverse relationship with each other.

부연하여, 턴디쉬(1) 내부에 발생되던 와류(3)는 그 발생개수가 단일개가 아니고 크고 작은 여러개(도1에는 큰 와류만 도시됨)를 보이고 있었으나 그 방향은 모두 동일방향으로 발생되므로 용강(2)이 배출되는 침지노즐(5) 상부에 위치된 스크류봉(10)과 만나면 그 진행에 장애가 되어 자연소멸된다.Incidentally, the vortex (3) generated inside the tundish (1) was showing a number of large and small numbers (only large vortices are shown in Figure 1) instead of a single number of molten steel When (2) meets the screw rod 10 located on the immersion nozzle (5) is discharged is an obstacle to its progress and disappears naturally.

또한, 상기 와류(3)가 소멸된 상태에서 턴디쉬(1) 내부 용강(2)이 침지노즐(5)을 통과하여 몰드(7)내부로 이동되고 그 통과완료시점에서 체크볼(12)이 침지노즐(5) 및 슬라이딩 게이트(4)를 폐쇄한다.In addition, the molten steel 2 inside the tundish 1 passes through the immersion nozzle 5 and is moved into the mold 7 in the state where the vortex 3 is extinguished. The immersion nozzle 5 and the sliding gate 4 are closed.

부연하여, 종래에 상기 통과완료시점에서는 슬라이딩 게이트(4)를 폐쇄하여 상기 불순개재물(6)의 몰드(7)내 유입을 막았으나 그 폐쇄시점을 정확히 포착하기가 어렸웠던 이유로 불순개재물(6)이 용강(2)을 따라 몰드(7)내로 유입되어 후공정에서 제품의 품질에 결함을 남겼지만 본 발명에 따른 체크볼(12)은 그 비중이 불순개재물(6)보다는 무겁고 용강(2)보다는 작으므로 용강(2)상부에 부유되어 있다가 용강(2)의 통과완료시점에서 슬라이딩 게이트(4)의 작동에 상관없이 자연스럽게 불순개재물(6)의 몰드(7)내 유입을 차단한다.In addition, in the past, when the passage was completed, the sliding gate 4 was closed to prevent the impurity inclusion 6 from flowing into the mold 7, but the impurity inclusion 6 was difficult because it was difficult to accurately capture the closing time. The molten steel (2) is introduced into the mold (7), leaving a defect in the quality of the product in a later process, but the check ball (12) according to the present invention is heavier than the impurity inclusion (6), rather than the molten steel (2) Since it is small, it floats on the upper part of the molten steel 2, and naturally blocks the inflow of the impurity inclusion 6 into the mold 7 irrespective of the operation of the sliding gate 4 when the molten steel 2 passes through.

이상에서 상세히 설명한 바와 같이, 본 발명에 따르면 주조작업의 턴디쉬 내부 용강에서 발생되는 와류현상으로 인한 불순개재물의 몰드내 유출을 배재할 수 있으며 용강유출완료시점에서 용강의 상부에 부유되던 불순개재물의 몰드내 유출을 자연스럽게 막아줌으로써 이후 공정에서 생산되는 제품의 결함요인을 사전에 제거하고 결과적으로 제품품질향상과 원가절감효과를 가져온다.As described above in detail, according to the present invention, the impurity inclusions in the mold may be excluded from the impurity inclusions caused by the vortex phenomenon occurring in the tundish internal molten steel of the casting operation, and the impurity inclusions floating on the upper part of the molten steel at the completion of the molten steel discharge By preventing the leakage in the mold naturally, defects of the products produced in the subsequent process are eliminated in advance, resulting in product quality improvement and cost reduction effect.

Claims (2)

주조작업의 턴디쉬(1) 내부 용강(2)에 잠겨서 용강(2)내 와류(3)발생을 억제하도록 상부는 원통형으로 형성되고 용강(2)내 함입되는 부분은 와류(3)의 역방향으로 스크류가 형성된 스크류봉(10)과;The upper part is formed in a cylindrical shape so as to be immersed in the molten steel 2 inside the tundish 1 of the casting operation to suppress the generation of the vortices 3 in the molten steel 2, and the portion entrained in the molten steel 2 in the opposite direction of the vortex 3 A screw rod 10 having a screw formed thereon; 상기 스크류봉(10)의 상부에 삽입고정되고 상기 턴디쉬(1) 상부에 설치된 화구커버(8)에 밀착되어 턴디쉬(1) 내부로 유입되는 스크류봉(10)을 고정시키는 고정용튜브(11)로 구성되는 것을 특징으로 하는 턴디쉬 와류 및 불순개재물 혼입방지장치.The fixing tube inserted into the upper part of the screw rod 10 and fixed to the crater cover 8 installed on the tundish 1 to fix the screw rod 10 introduced into the tundish 1 ( 11) Tundish vortex and impurity inclusion mixing prevention device, characterized in that consisting of. 제1항에 있어서, 상기 스크류봉(10)에는 이에 삽입되어 용강(2)의 표면에 부유되면서 그 수위를 따라 하강되고 용강(2)의 배출완료시점에서는 턴디쉬(1) 하부의 침지노즐(5)을 패쇄하는 뒤집힌 절두원뿔형의 체크볼(12)이 스크류봉(10)에 삽입되는 것을 특징으로 하는 턴디쉬 와류 및 불순개재물 혼입방지장치.The method of claim 1, wherein the screw rod 10 is inserted into it and floats on the surface of the molten steel 2 and descends along the level thereof, and at the time of discharging completion of the molten steel 2, the immersion nozzle under the tundish 1 5) Tundish vortex and impurity inclusion prevention device, characterized in that the inverted truncated cone-shaped check ball (12) to block the screw rod 10 is inserted.
KR1020020064300A 2002-10-21 2002-10-21 Device of preventing tundish vortex and impurities flowing into mold KR20040034212A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101104232B1 (en) * 2009-09-11 2012-01-10 학교법인 동의학원 Device for Preventing Vortex of Morten Steel in Tundish

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6340668A (en) * 1986-08-06 1988-02-22 Nippon Kokan Kk <Nkk> Vessel for molten metal having molten metal outflow port
JPH05228590A (en) * 1992-02-21 1993-09-07 Nippon Steel Corp Continuous casting method
JP2002011565A (en) * 2000-06-27 2002-01-15 Akechi Ceramics Co Ltd Long stopper for continuous casting
KR20020049776A (en) * 2000-12-20 2002-06-26 이구택 Stopper apparatus of tundish

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6340668A (en) * 1986-08-06 1988-02-22 Nippon Kokan Kk <Nkk> Vessel for molten metal having molten metal outflow port
JPH05228590A (en) * 1992-02-21 1993-09-07 Nippon Steel Corp Continuous casting method
JP2002011565A (en) * 2000-06-27 2002-01-15 Akechi Ceramics Co Ltd Long stopper for continuous casting
KR20020049776A (en) * 2000-12-20 2002-06-26 이구택 Stopper apparatus of tundish

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101104232B1 (en) * 2009-09-11 2012-01-10 학교법인 동의학원 Device for Preventing Vortex of Morten Steel in Tundish

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