KR20100069074A - Tundish for preventing impurities flowing into mold - Google Patents

Tundish for preventing impurities flowing into mold Download PDF

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Publication number
KR20100069074A
KR20100069074A KR1020080127644A KR20080127644A KR20100069074A KR 20100069074 A KR20100069074 A KR 20100069074A KR 1020080127644 A KR1020080127644 A KR 1020080127644A KR 20080127644 A KR20080127644 A KR 20080127644A KR 20100069074 A KR20100069074 A KR 20100069074A
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KR
South Korea
Prior art keywords
tundish
molten steel
slag
tapping
mold
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KR1020080127644A
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Korean (ko)
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이호영
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이호영
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Priority to KR1020080127644A priority Critical patent/KR20100069074A/en
Publication of KR20100069074A publication Critical patent/KR20100069074A/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
    • 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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE: A tundish for slag flowing prevention is provided to minimize the discharge of a slag in tapping and to prevent the turbulence of molten steel in a tundish. CONSTITUTION: A tundish for slag flowing prevention is doubly formed through a continuous casting. Each height of the tundish is different each other. The direction of a tab(5) of the tundish is to the side. The tab of the tundish is formed to face the side and prevents vortex. A controller(2a) is formed between each tundishes. The controller controls the inflow of the slag. An incline is formed in the floor of the tundish.

Description

슬래그 유출 방지를 위한 턴디쉬{Tundish for preventing impurities flowing into mold}Tundish for preventing impurities flowing into mold

본 발명은 연속 주조 시 슬래그의 유출을 방지하기 위한 턴디쉬의 구조에 관한 것으로서, 턴디쉬로부터 용강을 출강하게 될 때, 와류에 의해서 슬래그가 용강과 함께 유출되는 것을 방지할 수 있는 턴디쉬의 구조에 관한 것이다.The present invention relates to a structure of a tundish for preventing the outflow of slag during continuous casting, when the molten steel is pulled out from the tundish, the structure of the tundish that can prevent the slag from flowing out with the molten steel by vortex It is about.

배경기술을 도1을 참조하여 설명한다.Background art will be described with reference to FIG.

일반적으로, 용강(4)을 주조하는 과정에서 턴디쉬(1)내 용강(4)과 슬래그(3)를 분리하기 위하여 각종의 턴디쉬파우더들이 사용되고, 이로써 슬래그(3)는 그 비중이 용강(4)보다 작으므로 상부로 부상한다. In general, a variety of tundish powders are used to separate the molten steel 4 and the slag 3 in the tundish 1 in the process of casting the molten steel 4, whereby the slag 3 has a specific gravity thereof. It is smaller than 4) so it rises to the top.

용강(4)이 출강구(5)를 통하여 유출될 때 턴디쉬(1)내 용강의 높이가 낮아지게 되면 전향력에 의해서 와류가 발생하게 된다. 와류가 발생함에 따라서 용강(4)의 상부에 부상되어 있던 슬래그(3)가 용강과 함께 유출된다.When the molten steel 4 flows out through the tap hole 5, when the height of the molten steel in the tundish 1 decreases, vortices are generated by the turning force. As the vortex occurs, the slag 3 which floats on the upper portion of the molten steel 4 flows out together with the molten steel.

또한 슬래그(3)가 유출되는 시점에서 제어부(2)에서 용강(4)의 유출을 정지해야 하지만, 잔류하는 용강(4)의 양이 많고 그 시점을 맞추기가 힘들다.In addition, although the outflow of the molten steel 4 must be stopped by the controller 2 at the time when the slag 3 flows out, the amount of remaining molten steel 4 is large and it is difficult to meet the timing.

결국 슬래(3)그가 유출됨에 따라 제품의 품질에 치명적인 결함을 발생시키게 된다. Eventually, as the slag (3) is leaked, it will cause a fatal defect in the quality of the product.

연속 주조에 있어서, 용강을 수용하는 동시에 출강을 시키는 용기인 턴디쉬 내에서, 용강을 출강할 때, 용강이 일정한 깊이 이하로 내려가게 되면 출강구 부근에서 전향력에 의해 와류가 발생하게 된다. 와류가 생기면 용강의 상부에 있던 슬래그가 용강과 함께 출강하면서 제품에 품질이 불량해진다. 본 발명은 와류의 생성을 방지하고, 제품 내 슬래그 유입을 최소화하여 제품 생산에 효율을 높이고자 본 발명을 고안하게 되었다.In continuous casting, in a tundish, which is a container that receives and simultaneously taps molten steel, when the molten steel is pulled out, if the molten steel falls below a certain depth, vortices are generated by the turning force near the tap hole. When the vortex occurs, the slag on the upper part of the molten steel taps together with the molten steel, and the quality of the product becomes poor. The present invention has been devised to improve the efficiency of product production by preventing the generation of vortex, minimizing the introduction of slag in the product.

와류의 생성을 방지하고, 제품 내 슬래그 유입을 최소화하기 위하여 턴디쉬 내부의 출강구를 수직방향이 아닌 수평방향으로 하고, 슬래그가 용강과 혼합되어 출강되는 것을 줄이기 위해 통로로 연결된 2개의 연속된 턴디쉬로 한다. 그리고 턴디쉬의 바닥을 기울게 함으로써 용강의 깊이를 깊게 해서 적은 양에서도 슬래그와 출강구의 높이차를 크게 한다. To prevent the formation of vortices and to minimize the ingress of slag in the product, the troughs are placed in the horizontal direction rather than vertically, and two consecutive turns connected by passages to reduce the slag from being mixed with molten steel. Dish The bottom of the tundish is inclined to deepen the depth of the molten steel, thereby increasing the height difference between the slag and the tap in small amounts.

턴디쉬 내 출강구를 수직방향이 아닌 수평방향으로 함으로써 적은 양의 용강이 턴디쉬에서 와류를 생성하는 것을 방지할 수 있고, 턴디쉬를 용강이 유입되는 부분과 출강하는 부분으로 나누어, 두 번에 걸쳐 슬래그를 걸러냄으로써, 출강시 슬래그의 유출을 최소화 할 수 있다. 또한 턴디쉬의 바닥을 기울게 함으로써 용강의 손실을 줄일 수 있을 것으로 예상할 수 있다.By setting the troughs in the tundish horizontally rather than vertically, it is possible to prevent a small amount of molten steel from creating vortices in the tundish, dividing the tundish into a portion where the molten steel flows in and out, By filtering the slag over, the outflow of slag during the tapping can be minimized. It is also expected that the loss of molten steel can be reduced by tilting the bottom of the tundish.

이하는 도면을 참조하여 발명의 실시를 위한 구체적이 내용을 설명한다. Hereinafter, with reference to the drawings will be described in detail for the practice of the invention.

본 발명은 도면 2에서와 용강을 담는 턴디쉬(1)와 용강의 출강을 제어하는 제어부(2)와 용강을 출강시키는 출강구(5)로 이루어져 있다.  The present invention is composed of a tundish (1) containing the molten steel and a control unit (2) for controlling the tapping of the molten steel and a tap (5) for tapping the molten steel.

턴디쉬는 유입된 용강을 받는 턴디쉬(1a)와 용강을 출강시키는 턴디쉬(1b)로 이루어져 있고, 용강을 받는 턴디쉬를 출강시키는 턴디쉬보다 높게 위치시킨다. 각각의 턴디쉬는 바닥이 기울어져 있어서 용강의 손실을 줄일 수 있다. The tundish is composed of a tundish (1a) receiving the introduced molten steel and a tundish (1b) for tapping the molten steel, and positioned higher than the tundish (tap) for tapping the molten steel. Each tundish is tilted at the bottom to reduce the loss of molten steel.

두 턴디쉬 사이에는 제어부(2a)를 만들어 놓아서 턴디쉬(1a)에서 턴디쉬(1b)로 용강이 흘러갈 때 일차적으로 슬래그를 걸러낸다. 그리고 용강의 출강구(5)에 위치하는 제어부에서 다시 한 번 슬래그를 걸러내어 주조된 제품의 청정도를 높이다. The control unit 2a is provided between the two tundishes to filter the slag primarily when the molten steel flows from the tundish 1a to the tundish 1b. And the slag is filtered once again by the control unit located in the tap hole 5 of the molten steel to increase the cleanliness of the cast product.

용강을 출강시키는 출강구는 턴디쉬에 수평방향으로 부착되어서 와류의 생성을 방지한다. A tap for tapping the molten steel is attached to the tundish horizontally to prevent the formation of vortices.

도1은 턴디쉬에서 용강의 흐름을 도시한 모식도    1 is a schematic diagram showing the flow of molten steel in a tundish

도2는 본 발명의 바람직한 예로서 Figure 2 is a preferred example of the present invention

도2a는 용강의 높이가 높은 경우를 나타낸 그림,      Figure 2a is a figure showing a case where the height of the molten steel is high,

도2b는 용강의 높이가 낮은 경우를 나타낸 그림.      Figure 2b is a diagram showing a case where the height of the molten steel is low.

도3은 본 발명의 일실시예에 따른 그림으로서    3 is a diagram according to an embodiment of the present invention;

도3a는 용강의 출강구를 포함하는 턴디쉬 바닥의 경사를 크게 한 경우,3a is a case where the inclination of the tundish bottom including the tap hole of the molten steel is increased,

도3b는 용강의 유입부를 포함하는 턴디쉬를, 출강구를 포함하는 턴디쉬의 상부에 배치한 경우3B is a case where a tundish including an inlet of molten steel is disposed on an upper portion of the tundish including a tap hole;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1----턴디쉬     1 ---- Tundish

1a----용강이 유입되는 턴디쉬 1b----용강을 출강시키는 턴디쉬      1a ---- Tundish with molten steel 1b ---- Tundish with tapping molten steel

2----용강의 출강을 제어하는 제어부    2 ---- control unit to control tapping of molten steel

2a----1a와 1b사이에 위치하는 제어부      2a ---- control unit located between 1a and 1b

2b----용강의 출강구에 위치하는 제어부      2b ---- control unit located at the exit of molten steel

3----슬래그    3 ---- slag

4----용강    4 ---- molten steel

5----용강의 출강구    5 ---- Length of the molten steel

6----용강의 주입구    6 ---- Inlet of molten steel

Claims (4)

연속주조에서 2중으로 되어있고, 각각의 턴디쉬가 높이차를 가지는 것을 특징으로 하는 턴디쉬A tundish characterized by being double in continuous casting, each tundish having a height difference 청구항1에 있어서 와류 방지를 위해 턴디쉬 내에서 배출구의 방향을 측면으로 하는것을 특징으로 하는 턴디쉬The tundish according to claim 1, characterized in that the direction of the outlet side in the tundish to prevent vortex 청구항 1에 있어서 턴디쉬 사이에 위치해서 슬래그 유입을 제어하는 제어부를 가지는 것을 특징으로 하는 턴디쉬The tundish of claim 1 having a control unit located between the tundish to control the inflow of slag 청구항 1에 있어서 바닥에 경사를 가지는 모양의 턴디쉬 The tundish of claim 1 having a slope to the bottom
KR1020080127644A 2008-12-16 2008-12-16 Tundish for preventing impurities flowing into mold KR20100069074A (en)

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KR1020080127644A KR20100069074A (en) 2008-12-16 2008-12-16 Tundish for preventing impurities flowing into mold

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KR20100069074A true KR20100069074A (en) 2010-06-24

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