KR20100035821A - Tundish - Google Patents

Tundish Download PDF

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Publication number
KR20100035821A
KR20100035821A KR1020080095176A KR20080095176A KR20100035821A KR 20100035821 A KR20100035821 A KR 20100035821A KR 1020080095176 A KR1020080095176 A KR 1020080095176A KR 20080095176 A KR20080095176 A KR 20080095176A KR 20100035821 A KR20100035821 A KR 20100035821A
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KR
South Korea
Prior art keywords
tundish
molten steel
dam plate
main body
immersion nozzle
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KR1020080095176A
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Korean (ko)
Inventor
유대경
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현대제철 주식회사
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Priority to KR1020080095176A priority Critical patent/KR20100035821A/en
Publication of KR20100035821A publication Critical patent/KR20100035821A/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
    • B22D41/14—Closures
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • 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
    • 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
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
    • 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

Abstract

PURPOSE: A tundish is provided to prevent a submerged nozzle from being dipped by using the specific gravity difference of the molten steel and non-metallic inclusion. CONSTITUTION: A tundish comprises a tundish main body(100) and a dam plate(200). The top of the tundish main body is opened. The tundish main body is arranged on the floor side so that a submerged nozzle(105) is separated from one another. The dam plate is arranged in the direction crossing the inner wall of the tundish main body. The dam plate comprises an inlet and an outlet.

Description

턴디쉬{TUNDISH}Tundish {TUNDISH}

본 발명은 턴디쉬에 관한 것으로, 특히 용강이 수강된 후에 비금속 개재물이 침지 노즐측으로 혼입되어 구멍이 막히게 되는 현상을 예방하도록 그 구조가 개선된 것이다.The present invention relates to a tundish, and in particular, the structure is improved to prevent the phenomenon that the non-metallic inclusions are mixed to the immersion nozzle side to block the hole after the molten steel is received.

일반적으로 턴디쉬(Tundish)는 연속주조작업에서 레들(Ladle)로부터 주입된 용강을 받아 몰드(Mould)로 주입시켜주는 중간 용기에 해당된다. In general, the tundish corresponds to an intermediate container that receives molten steel injected from a ladle in a continuous casting operation and injects the molten steel into a mold.

그 턴디쉬의 구조는 크게 외피를 이루는 철피와 그 철피의 내측에 마련된 내화물로 구성된다.The structure of the tundish consists of an iron shell forming a large shell and a refractory provided inside the iron shell.

종래의 턴디쉬는 턴디쉬의 상측에 용강을 부어주는 레들이 이동 가능하게 마련되고, 하단에는 용강의 주입을 위해 몰드로 연결되어 있다.Conventional tundish is provided to move the ladle pouring the molten steel on the upper side of the tundish, the lower end is connected to the mold for injection of the molten steel.

그 턴디쉬는 철피의 내면에 내화물의 일종인 내화벽돌을 축조하고 그 바닥면에는 용강의 몰드측 배출을 위해 침지노즐이 설치되어 있다. 또한, 턴디쉬의 내화벽돌의 내면에 내화물코팅재가 도포되는 구조로 되어 있다.The tundish is constructed of a refractory brick, which is a kind of refractory material, on the inner surface of the steel bar, and an immersion nozzle is installed on the bottom surface for discharging the mold side of the molten steel. In addition, the refractory coating material is applied to the inner surface of the refractory brick of the tundish.

기존의 오픈형 턴디쉬는 상부가 개구되도록 형성되고, 바닥면에 침지노즐이 서로 이격되게 배치되는 주입부와, 주입부의 일측에 일부위가 외측으로 돌출되며 레들로부터 용강을 수강하는 수강부로 구성되어 있다.Existing open tundish is formed of the upper portion is formed to open, the injection portion is disposed on the bottom surface and the immersion nozzles are spaced apart from each other, and one side of the injection portion protrudes outwards and the receiving portion receives the molten steel from the ladle. .

그런데, 기존 수강부에서 용강을 수강하는 과정에서 용강 내에 함유된 비금속 개재물이 혼입되어 침지노즐을 통해 몰드 내부로 유입될 수 있으며, 이 경우에는 강의 기계적 성질에 악영향을 끼쳐 주조 결함의 원인이 되거나, 침지 노즐에 고착되어 구멍 막힘 현상을 발생시켜 조업이 중단되는 문제점이 있었다.However, in the process of taking the molten steel in the existing steel part, non-metallic inclusions contained in the molten steel may be mixed and introduced into the mold through the immersion nozzle, in which case it may adversely affect the mechanical properties of the steel, causing casting defects, There is a problem in that the operation is stopped by causing the hole clogging phenomenon is fixed to the immersion nozzle.

즉, 비금속 개재물이 몰드내에 혼입되는 것을 방지하기 위해서는 레들로부터 수강된 후에 비금속 개재물의 비중이 낮으므로, 용강의 표면으로 부상되어 분리시킬 필요가 있다.In other words, in order to prevent the non-metallic inclusions from entering the mold, the specific metal inclusions have a low specific gravity after being taken from the ladle, so it is necessary to float to the surface of the molten steel to separate them.

본 발명은 상기한 제반 문제점을 감안하여 이를 해결하고자 제안된 것으로, 그 목적은 용강의 수강후 비금속 개재물이 침지 노즐측으로 혼입되는 것을 예방하도록 그 구조가 개선된 턴디쉬를 제공하는 데 있다.The present invention has been proposed in view of the above problems, and an object thereof is to provide a tundish of which the structure is improved to prevent the non-metallic inclusions from being mixed into the immersion nozzle side after taking the molten steel.

상기한 목적을 달성하기 위한 본 발명은 상부가 개구되도록 형성되고, 바닥면에 침지노즐이 서로 이격되게 배치되는 턴디쉬 본체와,The present invention for achieving the above object is a tundish main body is formed so that the top is opened, the immersion nozzle is spaced apart from each other on the bottom surface,

상기 턴디쉬 본체의 내벽을 가로 지르는 방향으로 일체로 배치되며 하부에 용강의 출입을 위한 출입홀이 형성된 댐 플레이트를 구비한 것을 특징으로 한다.The dam plate may be integrally disposed in a direction crossing the inner wall of the tundish main body and provided with a dam plate having an entrance hole for entrance and exit of molten steel.

상기 댐 플레이트는 상부 일부위에 홈 형태로 형성되어 용강이 출입되는 출입홈을 더 구비한 것이다.The dam plate is formed in the shape of a groove on the upper portion is further provided with an access groove through which the molten steel enters.

상기 댐 플레이트의 출입홈은 상부에서 하부로 갈수록 좁아지는 쇄기 형태로 형성된 것이 바람직하다.The access groove of the dam plate is preferably formed in the shape of a wedge narrowing from the top to the bottom.

본 발명은 턴디쉬의 내부에 용강이 수강되면서 용강에 함유된 비금속 개재물이 침지 노즐측으로 유입되는 것을 차단하도록 그 구조가 개선된 것인 바, 이에 따르면 본 발명은 비금속 개재물과 용강의 비중 차이를 이용하여 분리시킴으로써, 침지 노즐의 막힘 현상을 예방할 수 있는 유용한 효과를 갖는다.The present invention is to improve the structure to prevent the non-metallic inclusions contained in the molten steel to enter the immersion nozzle side while the molten steel is received inside the tundish, according to the present invention uses the difference in specific gravity of the non-metallic inclusions and molten steel By separating by, it has a useful effect that can prevent the clogging phenomenon of the immersion nozzle.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 턴디쉬는, 도 1 내지 도 3을 참조하여 설명하면, 그 구성은 상부가 개구되도록 형성되고, 바닥면에 침지노즐(105)이 서로 이격되게 배치되는 주입부(120)와, 주입부(120)의 일측에 일부위가 외측으로 돌출되며 레들로부터 용강을 수강하는 수강부(110)로 구성된 턴디쉬 본체(100)와;The tundish according to the present invention, when described with reference to Figures 1 to 3, the configuration is formed so that the top is opened, the immersion nozzle 105 is disposed on the bottom surface spaced apart from each other, and A tundish main body 100 composed of a receiving part 110 receiving a molten steel from a ladle on one side of the injection part 120 and outwards;

턴디쉬 본체(100)의 수강부(110)와 주입부(120) 사이의 내벽 및 주입부(120)의 내벽 사이를 가로 지르도록 배치되는 칸막이 형태의 댐 플레이트(200)를 구비한 것이다.It is provided with a partition plate dam plate 200 arranged to cross between the inner wall between the receiving portion 110 and the injection portion 120 of the tundish body 100 and the inner wall of the injection portion 120.

더 상세히 설명하면, 댐 플레이트(200)는 수강부(110)의 출구측 내벽을 가로 지르는 것과, 수강부(110)를 기준으로 근접된 양측 주입부(120)의 내벽을 가로지르는 것으로 구성된다.In more detail, the dam plate 200 is configured to traverse the inner wall of the outlet side of the water receiving portion 110 and to cross the inner wall of both injection portions 120 adjacent to the water receiving portion 110.

댐 플레이트(200)는 턴디쉬 본체(100)의 내벽과 동일한 내화물 소재로 구성되며, 일 예로 알루미늄 카본 소재를 채택할 수 있다.The dam plate 200 may be made of the same refractory material as the inner wall of the tundish main body 100, and may employ, for example, an aluminum carbon material.

또한, 댐 플레이트(200)는 하부에 용강의 출입이 가능하도록 출입공이 형성되고, 더 바람직하게는 상부 중간 부위에 홈 형태의 출입홈(220)이 형성되어 있다.In addition, the dam plate 200 has an access hole formed at a lower portion thereof to allow access of molten steel, and more preferably, an access groove 220 having a groove shape is formed at an upper middle portion.

출입공은 댐 플레이트(200)의 하부에 일부가 개구되도록 형성되어 수강부(110)와 주입부(120)의 공간을 연통하여 용강이 흐르는 통로의 기능을 갖는다.The access hole has a function of a passage through which molten steel flows by communicating a space between the receiving portion 110 and the injection portion 120 so that a portion thereof is opened in the lower portion of the dam plate 200.

상기한 출입홈(220)은 댐 플레이트(200)를 정면에서 볼 때 역삼각형 쇄기 형태를 갖는다.The access groove 220 has an inverted triangle wedge shape when the dam plate 200 is viewed from the front.

그 출입홈(220)은 용강내에 함유된 비금속 개재물의 부상 분리를 위해 하부로 갈수록 협소해지는 구조로 형성된다.The access groove 220 is formed in a structure that narrows toward the bottom for floating separation of the non-metallic inclusions contained in the molten steel.

이러한 구성을 갖는 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention having such a configuration as follows.

본 발명에 의한 턴디쉬는, 레들에 의한 용강의 초기 수강시 비금속 개재물이 주입부(120)의 침지 노즐(105)측으로 혼입되는 것을 방지하도록 칸막이 형태의 댐 플레이트(200)를 턴디쉬 본체(100)의 내벽에 일체로 배치한 것이다.In the tundish according to the present invention, the tundish main body 100 may include a partition plate dam plate 200 to prevent non-metallic inclusions from entering the immersion nozzle 105 side of the injection part 120 during initial tapping of the molten steel by the ladle. It is arranged integrally on the inner wall of the).

이에 따라. 용강의 초기 수강시 수강부(110) 내의 용강은 댐 플레이트(200)에 의해 주입부(120)의 공간으로 유입되는 것을 지연시킬 수 있다.Accordingly. The molten steel in the receiving portion 110 during the initial tapping of the molten steel may delay the flow into the space of the injection portion 120 by the dam plate 200.

이로 인해 용강 내에 함유된 비금속 개재물이 용강에 비해 상대적으로 비중이 낮기 때문에 용강의 탕면으로 부상되어 용강과 분리되므로, 비금속 개재물이 침지 노즐(105)의 내부로 혼입되는 것을 예방할 수 있다.Because of this, since the non-metallic inclusions contained in the molten steel have a lower specific gravity than the molten steel, the non-metallic inclusions can be prevented from being mixed into the immersion nozzle 105 because the non-metallic inclusions are separated from the molten steel by floating on the molten steel.

이때, 수강부(110) 내에 수강된 용강은 초기에는 댐 플레이트(200)의 하부에 형성된 출입홀(210)을 통해 주입부(120)측으로 흐르게 되고, 이후에 일정 높이까지 탕면이 올라오게 되면 상부에 형성된 출입홈(220)을 통해서도 용강 및 비금속 개재물이 주입부(120)측으로 유입된다.At this time, the molten steel received in the receiving unit 110 is initially flowed to the injection unit 120 through the entrance hole 210 formed in the lower portion of the dam plate 200, after which the water surface is raised to a certain height, the upper portion Molten steel and non-metallic inclusions are also introduced to the injection part 120 side through the access groove 220 formed in the groove.

출입홈(220)을 통해 용강이 유입될 때에는 비금속 개재물이 용강으로부터 부상되어 분리된 상태이므로, 용강의 탕면 상부에 분리된 비금속 개재물이 침지 노즐(105)측으로 유입되는 것을 예방할 수 있다.When the molten steel is introduced through the access groove 220, since the non-metallic inclusions are separated from the molten steel and separated, the non-metallic inclusions separated on the upper surface of the molten steel may be prevented from flowing into the immersion nozzle 105.

한편, 출입홈(220)은 하부로 갈수록 좁아지는 형태로 되어 있으므로, 용강에 함유된 비금속 개재물이 한꺼번에 다른 공간으로 넘어가는 것을 방지할 수 있다.On the other hand, since the access groove 220 is narrowed toward the bottom, the non-metallic inclusions contained in the molten steel can be prevented from passing to other spaces at once.

도 1은 본 발명에 따른 턴디쉬를 나타낸 평면도.1 is a plan view showing a tundish according to the present invention.

도 2는 본 발명의 댐 플레이트를 나타낸 사시도.2 is a perspective view showing a dam plate of the present invention.

도 3은 도 1의 A-A선 단면도.3 is a cross-sectional view taken along the line A-A of FIG.

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

100 : 턴디쉬 본체 105 : 침지 노즐100: tundish body 105: immersion nozzle

110 : 수강부 120 : 주입부110: receiving unit 120: injection unit

200 : 댐 플레이트 210 : 출입홀200: dam plate 210: entrance hole

220 : 출입홈220: entrance home

Claims (3)

상부가 개구되도록 형성되고, 바닥면에 침지노즐(105)이 서로 이격되게 배치되는 턴디쉬 본체(100)와,The tundish main body 100 is formed so that the upper opening, the immersion nozzle 105 is spaced apart from each other on the bottom surface, 상기 턴디쉬 본체(100)의 내벽을 가로 지르는 방향으로 일체로 배치되며 하부에 용강의 출입을 위한 출입홀(210)이 형성된 댐 플레이트(200)를 구비한 것을 특징으로 하는 턴디쉬.Tundish characterized in that it is integrally disposed in the direction across the inner wall of the tundish main body 100 and the dam plate 200 formed in the lower portion has an entrance hole 210 for entering and exiting the molten steel. 청구항 1에 있어서,The method according to claim 1, 상기 댐 플레이트(200)는 상부 일부위에 홈 형태로 형성되어 용강이 출입되는 출입홈(220)을 더 구비한 것을 특징으로 하는 턴디쉬. The dam plate 200 is formed in the shape of a groove on the upper portion of the tundish characterized in that it further comprises an access groove 220 for entering the molten steel. 청구항 2에 있어서,The method according to claim 2, 상기 댐 플레이트(200)의 출입홈(220)은 상부에서 하부로 갈수록 좁아지는 쇄기 형태로 형성된 것을 특징으로 하는 턴디쉬.The access groove 220 of the dam plate 200 is a tundish, characterized in that formed in the shape of a wedge narrowed from the top to the bottom.
KR1020080095176A 2008-09-29 2008-09-29 Tundish KR20100035821A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106111961A (en) * 2016-08-30 2016-11-16 山东钢铁股份有限公司 A kind of continuous casting tundish and dam thereof
CN110918962A (en) * 2019-11-18 2020-03-27 张家港宏昌钢板有限公司 Retaining wall type continuous casting tundish
CN114433833A (en) * 2021-12-27 2022-05-06 安徽长江钢铁股份有限公司 Side-open-groove tundish slag retaining wall and setting method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106111961A (en) * 2016-08-30 2016-11-16 山东钢铁股份有限公司 A kind of continuous casting tundish and dam thereof
CN110918962A (en) * 2019-11-18 2020-03-27 张家港宏昌钢板有限公司 Retaining wall type continuous casting tundish
CN114433833A (en) * 2021-12-27 2022-05-06 安徽长江钢铁股份有限公司 Side-open-groove tundish slag retaining wall and setting method thereof

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