KR100419627B1 - Device for venting the fume in twin roll strip casting machine - Google Patents
Device for venting the fume in twin roll strip casting machineInfo
- Publication number
- KR100419627B1 KR100419627B1 KR10-1999-0056691A KR19990056691A KR100419627B1 KR 100419627 B1 KR100419627 B1 KR 100419627B1 KR 19990056691 A KR19990056691 A KR 19990056691A KR 100419627 B1 KR100419627 B1 KR 100419627B1
- Authority
- KR
- South Korea
- Prior art keywords
- gas
- roll
- fume
- rolls
- pair
- Prior art date
Links
Classifications
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Continuous Casting (AREA)
Abstract
본 발명은 쌍롤형 박판주조기에서 금속용탕의 산화를 방지하기 위해 탕면을 덮어주는 탕면커버의 하부공간의 분위기가스공간에서 주조중 발생되는 오염된 기체인 흄이 쌍롤측으로 이동되지 않도록 흄을 분위기 바깥으로 배출하여 박판품질을 향상시킬수 있는 쌍롤형 박판주조기의 흄 배출장치에 관한 것이다.In the present invention, in order to prevent oxidation of the molten metal in the twin-roll type sheet casting machine, the fume is moved out of the atmosphere so that the fume, which is a contaminated gas generated during casting, in the atmosphere gas space of the bottom space of the bottom surface of the bottom cover covering the surface of the molten metal is not moved to the twin roll side. The present invention relates to a fume discharge device for a twin roll sheet caster that can improve sheet quality by discharging.
본 발명은 서로 반대방향으로 회전하는 쌍롤(3)(3a)과, 용탕풀(5)을 형성하도록 상기 쌍롤(3)(3a)양단에 설치되는 에지댐(4)과, 상기 용탕풀(5)의 상부에 분위기가스공간을 형성하도록 설치되는 탕면커버(7)를 갖추며, 상기 탕면커버(7)에 쌍롤(3)(3a)과 탕면측으로 비산화성가스를 공급하는 제 1,2가스공급구(8)(9)를 갖추고, 쌍롤(3)(3a)과 대응하는 탕면커버(7)에 분위기가스공간을 밀폐하도록 차폐커튼(11)을 갖추어 상기 쌍롤(3)(3a)사이로 용강을 통과시켜 박판(20)을 주조하는 쌍롤형 박판주조기에 있어서, 상기 탕면커버(7)에는 제 1,2가스공급구(8)(9)에서 분사되는 비산화성가스의 분사력에 의해서 용탕풀(5)중앙부로 이동되는 흄을 외부로 배기할 수 있도록 복수개의 배출구(10)를 롤폭방향으로 복수개 장착한 쌍롤형 박판주조기의 흄배출장치를 제공한다.The present invention provides a pair of rolls (3) (3a) that rotate in opposite directions to each other, an edge dam (4) provided at both ends of the pair of rolls (3) (3a) to form a molten pool (5), and the molten pool (5) First and second gas supply holes having a bottom surface cover 7 installed to form an atmosphere gas space on the upper side of the top surface, and supplying non-oxidizing gas to the double rolls 3 and 3a and the surface of the floor surface cover 7. (8) (9) and shielded curtains (11) to seal the atmosphere gas space in the paired rolls (3) (3a) and the corresponding bath cover (7) to pass molten steel between the paired rolls (3) (3a). In the twin roll type sheet casting machine for casting the thin plate 20, the molten pool (5) by the injection force of the non-oxidizing gas injected from the first and second gas supply ports (8) (9) Provides a fume discharge device of a twin-roll thin plate casting machine equipped with a plurality of outlets 10 in the roll width direction to exhaust the fume moved to the center portion to the outside.
Description
본 발명은 쌍롤형 박판주조기에서 금속용탕의 산화를 방지하기 위해 탕면을 덮어주는 탕면커버의 하부공간의 분위기가스공간에서 주조중 발생되는 오염된 기체인 흄이 쌍롤측으로 이동되지 않도록 흄을 분위기 바깥으로 배출하여 박판품질을향상시킬수 있는 쌍롤형 박판주조기의 흄 배출장치에 관한 것이다.In the present invention, in order to prevent oxidation of the molten metal in the twin-roll type sheet casting machine, the fume is moved out of the atmosphere so that the fume, which is a contaminated gas generated during casting, in the atmosphere gas space of the bottom space of the bottom surface of the bottom cover covering the surface of the molten metal is not moved to the twin roll side. The present invention relates to a fume discharge device of a twin-roll type sheet casting machine that can improve sheet quality by discharging.
일반적으로 쌍롤형 박판주조기(100)는 도 1에 도시한 바와같이, 턴디쉬(1)의 용강을 용강주입용 주입노즐(2)을 통하여 미도시된 구동장치에 의해서 서로 반대방향으로 회전하는 쌍롤(3)(3a)사이로 주입하여 마주하는 쌍롤(3)(3a)과 에지댐(3)사이에 용탕풀(5)을 형성하고, 회전하는 롤(3)(3a)과 용강의 접촉을 통하여 용강을 급속응고하여 응고쉘(6)을 형성하면서 박판(20)을 주조하는 설비이다.Generally, as shown in FIG. 1, the twin roll-type sheet casting machine 100 rotates the molten steel of the tundish 1 in the opposite direction by a driving device not shown through the molten steel injection nozzle 2. (3) The molten pool 5 is formed between the paired rolls 3, 3a and the edge dam 3 which are injected and faced between the three rolls 3a, and through contact between the rotating rolls 3, 3a and the molten steel. It is a facility for casting a thin plate 20 while rapidly solidifying molten steel to form a solidified shell (6).
그리고, 주조중 용탕풀(5)의 탕면과 접촉하는 기체중에 함유된 산소로 인하여 용탕이 산화되는 것을 방지하기 위하여 상기 쌍롤(3)(3a) 상부의 일부와 양측 에지댐(4)의 상부를 포함하는 면적에 대하여 탕면을 덮어주는 탕면커버(7)를 설치하고, 그 아래와 탕면사이의 공간을 비산화성가스로 치환하여 주는 방법을 일반적으로 사용하고 있다.In order to prevent the molten metal from being oxidized due to the oxygen contained in the gas in contact with the molten metal of the molten metal pool 5 during casting, a part of the upper portion of the upper portion of the paired rolls 3 and 3a and the upper edge dams 4 are formed. In general, a method is provided in which a floor cover 7 is provided to cover the surface of the bath, and the space between the floor and the floor is replaced with a non-oxidizing gas.
이러한 경우 탕면의 용탕이 비산화성가스와 접촉하게 되므로 용융금속의 산화를 최대한 억제하여 우수한 품질의 박판(20)을 주조할수 있는 것이다.In this case, the molten metal of the hot water surface is in contact with the non-oxidizing gas, thereby suppressing oxidation of the molten metal as much as possible, thereby casting the thin plate 20 having excellent quality.
상기와 같이 비산화성 분위기를 형성하기 위한 장치인 탕면커버에 관련된 특허는 일본특개평 6-29711호, 일본특개평 7-204794호, 일본특개평 8-309489호, 일본특개평 9-29397호등에 개시되어 있다.Patents related to the bath surface cover, which is a device for forming a non-oxidizing atmosphere as described above, are disclosed in Japanese Patent Laid-Open No. 6-29711, Japanese Patent Laid-Open No. 7-204794, Japanese Patent Laid-Open No. 8-309489, Japanese Patent Laid-Open No. 9-29397, and the like. Is disclosed.
그러나, 용탕풀(5)의 탕면상의 분위기공간이 비산화성가스로 채워진다 하여도 용탕의 성분중 강의 경우 망간, 아연, 납등 용이하게 증발(vaporization)되는 성분이 있으면, 그 증발성분이 용탕으로부터 분위기 기체와 더불어 빠져 나오게 되는데 이로 인하여 분위기기체가 순수한 비산화성가스에 증발성분의 증기가 혼합된혼합기체인 흄(fume)으로 오염이 된다.However, even if the atmosphere space on the surface of the molten pool 5 is filled with non-oxidizing gas, if any of the components of the molten steel are easily evaporated, such as manganese, zinc, and lead, the evaporating component is an atmospheric gas from the molten metal. With this, the atmosphere gas becomes contaminated with fume, a mixed gas in which vapor of evaporation component is mixed with pure non-oxidizing gas.
이러한 현상이 있음에도 불구하고 일본 특개평 6-29711호, 일본특개평 9-29397호 등에서는 공급된 비산화성가스에 대한 언급과 주위 공기와의 차단을 위한 실링(sealing)에 대해서만 강조하고 있으므로 이러한 장치에서는 분위기가스공간내에 생기 흄이 외부로 빠져나갈수 없게 되어있다.Despite such phenomena, Japanese Patent Application Laid-Open No. 6-29711 and Japanese Patent Application Laid-open No. 9-29397 only emphasize the mention of the supplied non-oxidizing gas and the sealing for blocking the ambient air. In the atmosphere, the gaseous fumes in the atmosphere gas space cannot escape to the outside.
한편, 일본 특개평 7-204794호, 특개평 8-309489호등에서는 기체의 배출통로가 도식되어 있지만 그 경로에 바로 문제가 있다.On the other hand, in Japanese Patent Laid-Open Nos. 7-204794 and 8-309489, a gas discharge passage is illustrated, but there is a problem in the path.
도 1에 종래에 사용하던 탕면커버(7)와, 제 1가스공급구(8)로부터 쌍롤(3)(3a)측으로 분사되는 비산화성가스와 제 2가스공급구(9)로부터 탕면측으로 비산화성가스를 분사되는 비산화성가스의 공급 및 배출경로를 도시하였다.Non-oxidative gas injected from the first gas supply port 8 to the pair of rolls 3 and 3a side and the second gas supply port 9 which are conventionally used in FIG. The supply and discharge paths of the non-oxidizing gas injected with the gas are shown.
즉, 상기 탕면커버(7)에 장착된 제 1,2가스공급구(8)(9)를 통하여 비산화성가스를 공급하면, 비산화성가스가 흐르면서 용탕으로부터 나오는 증발성분과 섞여 오염된 혼합기체인 흄이 쌍롤(3)(3a)측으로 주조중 빠져나가기 때문에, 상기 쌍롤(3)(3a)의 표면과 접촉하는 흄이 다시 고체로 응축되면서 롤표면에는 망간성분이 다량 흡착되는 한편, 산화망간(MnO)도 흡착된다.That is, when the non-oxidizing gas is supplied through the first and second gas supply ports 8 and 9 mounted on the water surface cover 7, the non-oxidizing gas flows and is contaminated with the evaporated component coming out of the molten metal. Since the fume coming into the twin rolls (3) and (3a) during casting is condensed into solid again, the manganese oxide (MnO) is adsorbed on the roll surface while the fumes in contact with the surface of the twin rolls (3) and (3a) are condensed into solid again. ) Is also adsorbed.
이와같이 흄이 쌍롤(3)(3a)표면에 계속 흡착되면 용융금속으로부터 롤표면으로의 열전달을 방해하는 작용하게 되므로 주조가 진행됨에 따라 박판(20)의 응고쉘(6)의 두께 편차를 발생시켜 박판응고시 균일을 발생시키는 한편, 쌍롤(3)(3a)의 냉각능을 저하시키고, 주조속도를 감소시키는 문제점을 유발하였다.As the fume continues to be adsorbed on the surface of the twin rolls (3) and (3a), it acts to hinder the heat transfer from the molten metal to the surface of the roll. As the casting progresses, the thickness of the solidified shell 6 of the thin plate 20 is generated. The uniformity was generated during thin plate solidification, while lowering the cooling ability of the double rolls 3 and 3a and causing a problem of decreasing the casting speed.
또한, 흄이 쌍롤(3)(3a)측으로 빠져나올 때 롤의 폭전반에 걸쳐서 흄이 고른양으로 배출되지 못하고, 상기 쌍롤(3)(3a)의 가장자리보다 중앙부로 더 빨리 배출되는 반면에 롤의 가장자리에는 흄의 정체현상이 발생되기 때문에, 상기 쌍롤(3)(3a)의 표면에 증발성분이 흡착되기가 더 용이하여 롤의 가장자리의 냉각능이 중앙부보다 저하되는 문제점이 있었다.In addition, when the fume escapes to the double roll 3, 3a side, the fume is not discharged evenly over the width of the roll, and is discharged more quickly to the center portion than the edge of the double roll 3, 3a. Since the phenomenon of stagnation of the fume occurs at the edge of, the evaporation component is more easily adsorbed on the surface of the pair roll (3) (3a), there is a problem that the cooling ability of the edge of the roll is lower than the central portion.
이에 따라, 주조되는 박판의 가장자리의 온도가 중앙부보다 더 높게 되므로 주편의 품질을 저하시키는 원인을 유발하였다. 또한, 상기 쌍롤(3)(3a)표면에서의 망간의 흡착이 불균일하여 주조되는 박판표면에 응고시 발생하는 수축으로 인해 균열이 국부적으로 발생하는 문제점이 있었다.Accordingly, the temperature of the edge of the thin plate to be cast is higher than the center portion, causing a cause of deterioration of the quality of the cast. In addition, there is a problem in that cracks are locally generated due to shrinkage occurring during solidification on the thin plate surface to be cast due to uneven adsorption of manganese on the surface of the pair rolls 3 and 3a.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위해서 안출된 것으로서, 그 목적은, 용탕풀상부에 형성되는 오염된 혼합기체인 흄이 쌍롤표면에 흡착되지 않도록 외부로 배출함으로서 응고쉘과 쌍롤과의 균일한 열전달을 도모하여 박판의 표면균열을 방지하고, 롤폭방향으로 고른 냉각능을 얻을 수 있는 쌍롤형 박판주조기의 흄 배출장치를 제공하고자 한다.Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to discharge the contaminated mixed gas formed in the upper portion of the molten pool to the outside so as not to be adsorbed on the surface of the twin roll to uniformity between the solidified shell and the twin roll The present invention aims to provide a fume discharge device of a twin roll type sheet caster that can achieve surface heat cracking of a thin plate by obtaining a heat transfer and obtain even cooling ability in a roll width direction.
도 1은 일반적인 쌍롤형 박판주조기에서 흄이 배출되는 상태를 도시한 개략도,1 is a schematic view showing a state in which the fume is discharged from a typical double roll type sheet casting machine,
도 2는 본 발명에 따른 쌍롤형 박판주조기의 흄 배출장치에서 흄이 배출되는 것을 도시한 작업상태도,Figure 2 is a working state showing that the fume is discharged from the fume discharge device of the twin-roll sheet caster according to the present invention,
도 3은 본 발명에 따른 쌍롤형 박판주조기의 흄 배출장치를 도시한 평면도.Figure 3 is a plan view showing a fume discharge device of the twin-roll sheet caster according to the present invention.
* 도면의 주요부분에 대한 부호의 설명** Explanation of symbols for the main parts of the drawings *
3,3a ... 쌍롤 4 ..... 에지댐3,3a ... double roll 4 ..... edge dam
5 ..... 용탕풀 6 ..... 응고쉘5 ..... molten pool 6 ..... solidified shell
7 ...... 탕면커버 8,9 ... 제 1,2가스공급구7 ...... Water cover 8,9 ... 1,2 gas supply port
10 ..... 배출구 100 ... 쌍롤형 박판주조기10 ..... outlet 100 ... twin roll sheet casting machine
상기 목적을 달성하기 위한 기술적인 구성으로서 본 발명은,The present invention as a technical configuration for achieving the above object,
서로 반대방향으로 회전하는 쌍롤과, 용탕풀을 형성하도록 상기 쌍롤 양단에 설치되는 에지댐과, 상기 용탕풀의 상부에 분위기가스공간을 형성하도록 설치되는 탕면커버를 갖추며, 상기 탕면커버에 쌍롤과 탕면측으로 비산화성가스를 공급하는 제 1,2가스공급구를 갖추고, 쌍롤과 대응하는 탕면커버에 분위기가스공간을 밀폐하도록 차폐커튼을 갖추어 상기 쌍롤사이로 용강을 통과시켜 박판을 주조하는 쌍롤형 박판주조기에 있어서,And a pair of rolls rotating in opposite directions, an edge dam provided at both ends of the pair of rolls to form a molten pool, and a bath surface cover provided to form an atmosphere gas space on an upper portion of the molten pool. The first and second gas supply ports for supplying non-oxidizing gas to the side, and the double roll type sheet casting machine for casting a thin plate by passing the molten steel between the two rolls and a shielding curtain so as to seal the atmosphere gas space in the cup cover corresponding to the double roll. In
상기 탕면커버에는 제 1,2가스공급구에서 분사되는 비산화성가스의 분사력에 의해서 용탕풀중앙부로 이동되는 흄을 외부로 배기할 수 있도록 복수개의 배출구를 롤폭방향으로 복수개 장착함을 특징으로 하는 쌍롤형 박판주조기의 흄배출장치를 마련함에 의한다.A pair of the floor cover is provided with a plurality of outlets in the roll width direction in order to exhaust the fumes moved to the center of the melt pool by the injection force of the non-oxidizing gas injected from the first and second gas supply port to the outside By providing fume discharge device of roll type sheet casting machine.
이하, 본 발명을 첨부된 도면을 참조하여 보다 상세히 설명한다.Hereinafter, with reference to the accompanying drawings the present invention will be described in more detail.
도 2는 본 발명에 따른 쌍롤형 박판주조기의 흄 배출장치에서 흄이 배출되는 것을 도시한 작업상태도이고, 도 3은 본 발명에 따른 쌍롤형 박판주조기의 흄 배출장치를 도시한 평면도이다.2 is a working state diagram showing the discharge of the fume from the fume discharge device of the twin-roll sheet caster according to the present invention, Figure 3 is a plan view showing a fume discharge device of the twin-roll sheet caster according to the present invention.
본 발명의 흄 배출장치(90)는 도 2와 3에 도시한 바와같이, 쌍롤(3)(3a)측과 탕면측으로 비산화성가스를 각각 공급하는 제 1,2가스공급구(8)(9)와, 탕면커버(7)와 쌍롤(3)(3a)사이의 틈새를 차단하여 탕면상부의 분위기가스공간을 형성하는 차폐커튼(11)을 설치한 쌍롤형 박판주조기(100)에 갖추어지는 것이다.2 and 3, the first and second gas supply ports 8 and 9 for supplying the non-oxidizing gas to the pair rolls 3, 3a and the hot water side, respectively, as shown in FIGS. ) And a double roll type sheet casting machine (100) provided with a shielding curtain (11) for forming an atmosphere gas space in the upper surface of the hot water by blocking the gap between the hot water surface cover (7) and the double roll (3) (3a). .
즉, 상기 장치(90)는 상기 탕면커버(7)에 제 1,2가스공급구(8)(9)에서 분사되는 비산화성가스의 분사력에 의해서 용탕풀(5)중앙부로 이동되는 흄을 가스와 더불어 외부로 배기할 수 있도록 복수개의 배출구(10)를 롤폭방향으로 복수개 장착한다.That is, the device 90 gas the fume moved to the center of the molten pool (5) by the injection force of the non-oxidizing gas injected from the first and second gas supply ports (8) (9) to the water surface cover (7) In addition, a plurality of outlets 10 are mounted in the roll width direction so as to be exhausted to the outside.
여기서, 상기 차폐커튼(11)이 탕면커버(7)와 쌍롤(3)(3a)사이에 차폐커튼(11)이 설치됨으로서 용탕내의 성분이 증발하면서 발생되는 흄이 상기 쌍롤(3)(3a)측으로 오더라도 상기 제 1가스공급구(8)로부터 롤측으로 분사되는 비산화성가스의 분사압력에 의해서 상기 쌍롤(3)(3a)과의 접촉은 차단된다.In this case, the shield curtain 11 is installed between the floor cover 7 and the pair rolls 3 and 3a so that the fumes generated while evaporating the components in the molten metal are the pair rolls 3 and 3a. Even if it comes to the side, the contact with the said pair rolls 3 and 3a is interrupted by the injection pressure of the non-oxidizing gas injected from the said 1st gas supply port 8 to the roll side.
이러한 상기 제 1가스공급구(8)는 이로부터 분사되는 비산화성가스가 상기 쌍롤(3)(3a)표면을 충분히 접하여 스치면서 롤표면에 부착되어 있을 수 있는 산소를 치환하고, 발생된 흄이 롤표면에 흡착되지 못하도록 상기 쌍롤(3)(3a)에 근접하여 설치되어 미도시된 가스공급라인으로부터 공급된 비산화성가스를 바로 롤표면으로 분사하도록 구성하는 것이 바람직하다.The first gas supply port 8 replaces oxygen that may be attached to the surface of the roll while the non-oxidizing gas injected therefrom touches the surface of the pair of rolls 3 and 3a sufficiently, and the generated fume is discharged. It is preferable that the non-oxidizing gas supplied from the gas supply line, which is provided in close proximity to the pair rolls 3 and 3a so as not to be adsorbed on the roll surface, is sprayed directly onto the roll surface.
한편, 상기 제 2가스공급구(9)는 흄이 발생되는 분위기가스공간내에 압력구배를 주어 발생된 흄, 가스와 같은 기체의 흐름을 주입노즐(2)측인 용탕풀(5)중앙부측으로 자연스럽게 유도할수 있도록 상기 쌍롤(3)(3a)측으로 비산화성가스를 공급하는 제 1가스공급구(8)의 가스공급량보다 적은 가스공급량으로 비산화성가스를 분사하는 것이 좋다.On the other hand, the second gas supply port (9) naturally gives a pressure gradient in the atmosphere gas space in which the fumes are generated to naturally lead the flow of the generated gas, such as fumes, gas to the center of the molten pool (5) on the injection nozzle (2) side The non-oxidizing gas may be injected at a gas supply amount smaller than that of the first gas supply port 8 that supplies the non-oxidizing gas to the pair rolls 3 and 3a.
이에 따라, 상기 제 1가스공급구(8)에서 분사되는 비산화성가스의 공급량이 상기 제 2가스공급구(9)에서 분사되는 가스공급량보다 많아지면 롤측의 압력이 노즐측인 용탕풀(5)의 중앙부보다 더 높아지면서 흄, 가스와 같은 기체의 흐름이 압력이 높은 쌍롤(3)(3a)측에서 압력이 낮은 주입노즐(2)측인 용탈풀중앙부로 자연스럽게 형성되는 것이다.Accordingly, when the supply amount of the non-oxidizing gas injected from the first gas supply port 8 is larger than the gas supply amount injected from the second gas supply port 9, the pressure of the roll side is the molten pool 5 having the nozzle side. As it is higher than the central part of the gas stream, the flow of gas such as fume and gas is naturally formed on the molten pool central part on the injection nozzle 2 side having a low pressure on the side of the high pressure double roll 3, 3a.
또한, 발생된 흄을 쌍롤(3)(3a)측으로 배출하지 않고 에지댐(4)측으로 유도하여 에지댐(4)과 탕면커버(7)사이의 틈새를 통하여 배출할수도 있다.In addition, the generated fume may be discharged to the edge dam 4 side without discharging to the pair roll 3, 3a side, and discharged through the gap between the edge dam 4 and the bottom cover 7.
그리고, 상기 각 배출구(10)에는 상기 분위기가스공간의 압력을 압력계로서측정하여 측정된 압력이 설정된 압력에 도달할 때 배출유로를 개방하도록 전동 또는 수동으로 개폐작동되는 밸브부재(미도시)를 장착한다.In addition, each outlet 10 is equipped with a valve member (not shown) which is electrically or manually opened and closed to measure the pressure in the atmosphere gas space as a pressure gauge to open the discharge passage when the measured pressure reaches a set pressure. do.
상기한 구성을 갖는 본 발명의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effect of the present invention having the above configuration is as follows.
오스테나이트계 스테인레스강을 쌍롤형 박판주조기(100)로서 주조하는 경우,구체적으로 통상 304스테인레스강이라 불리우는 18% Cr-8% Ni을 함유하는 합금으로 이러한 304스테인레스강에는 망간(Mn)이 함유되어 있는데 이 원소의 용융온도는 섭씨 1244℃이고, 용강의 온도가 내려가면 증발되어 흄으로 배출되는 특성이 있다. 그리고, 탕면커버(7)내의 공간으로 제 1,2가스공급구(8)(9)를 통하여 주입되는 비산화성가스로는 100%질소를 사용하였다. 물론 비산화성가스는 질소와 아르곤의 혼합기체 또는 아르곤 단독으로 사용할수 도 있다.In the case of casting austenitic stainless steel as a twin roll sheet casting machine (100), an alloy containing 18% Cr-8% Ni, which is specifically called 304 stainless steel, is contained in the 304 stainless steel containing manganese (Mn). The melting temperature of this element is 1244 ℃, and when the temperature of molten steel decreases, it evaporates and is discharged as fume. In addition, 100% nitrogen was used as the non-oxidizing gas injected through the first and second gas supply ports 8 and 9 into the space in the bath surface cover 7. Of course, the non-oxidizing gas may be used as a mixture of nitrogen and argon or argon alone.
먼저, 주조시작 직전에는 탕면커버(7)에 설치된 배출구(10)의 각 밸브부재를 닫아 배출유로를 차단한 상태에서, 상기 제 1,2가스공급구(8)(9)를 통하여 탕면커버(7)하부의 분위기가스공간내로 비산화성가스를 공급하면 상기 분위기가스공간은 비산화성가스로 가득 채워지게 된다.First, before the start of casting, each valve member of the outlet 10 installed in the bottom cover 7 is closed and the discharge flow path is blocked, and the first and second gas supply ports 8 and 9 are provided in the bottom surface cover ( 7) When non-oxidizing gas is supplied into the lower atmosphere gas space, the atmosphere gas space is filled with non-oxidizing gas.
이어서, 주조가 시작되어 턴디쉬(1)의 주입노즐(2)을 통하여 쌍롤(3)(3a)사이에 용강을 공급하여 용탕풀(5)을 형성하면, 흄이 발생되고 발생된 흄과 더불어 분위기가스공간내로 공급되는 비산화성가스에 의해서 분위기가스공간의 내부압력이 설정된 기준압력보다 커지면, 이를 감지한 압력계(미도시)의 검지신호에 의해서 상기 밸브부재가 개방작동되기 때문에 차단되었던 상기 배출구(10)의 배출유로는 열려지게 된다.Subsequently, casting is started to supply molten steel between the pair rolls 3 and 3a through the injection nozzle 2 of the tundish 1 to form the molten pool 5, whereby fumes are generated and together with the generated fumes. When the internal pressure of the atmosphere gas space is greater than the set reference pressure by the non-oxidizing gas supplied into the atmosphere gas space, the discharge port (block) is blocked because the valve member is opened by the detection signal of a pressure gauge (not shown) that senses this. The discharge flow path of 10) is opened.
이때, 상기 쌍롤(3)(3a)과 탕면커버(7)사이에는 차폐커튼(11)이 설치되어 있고, 상기 제 1가스공급구(8)를 통하여 쌍롤(3)(3a)측으로 연속공급되는 비산화성가스의 공급량은 제 2가스공급구(9)를 통하여 탕면측으로 공급되는 비산화성가스의 공급량보다 많아서 분위기가스공간내에 롤측보다 배출구가 설치되는 용탕풀(5)의 중앙부측의 압력이 낮은 압력구배를 형성하고 있기 때문에, 분위기가스내의 흄은 도 2에 도시된 화살표와 같이 롤측으로 전혀 이동하지 않고 용탕풀(5)의 중앙부측으로 이동하는 가스흐름을 형성하면서 유일통로인 상기 배출구(10)를 통하여 외부로 배기되는 것이다.At this time, a shielding curtain 11 is installed between the pair rolls 3 and 3a and the bottom surface cover 7, and is continuously supplied to the pair rolls 3 and 3a through the first gas supply port 8. The supply amount of the non-oxidizing gas is higher than the supply amount of the non-oxidizing gas supplied to the water surface side through the second gas supply port 9 so that the pressure at the central side of the molten metal pool 5 in which the outlet port is installed in the atmosphere gas space rather than the roll side is low. Since the gradient is formed, the fume in the atmosphere gas forms the gas flow that moves to the center portion of the molten pool 5 without moving to the roll side as shown by the arrow shown in FIG. It is exhausted to the outside through.
상술한 바와같은 본 발명에 의하면, 용탕풀의 중앙부에 해당하는 탕면커버에 복수개의 배출구를 갖추고, 분위기가스공간내에 압력구배가 형성되도록 롤측으로 비산화성가스를 공급하는 제 1가스공급구의 가스공급량을 탕면측으로 비산화성가스를 공급하는 제 2가스공급구의 가스공급량보다 많도록 함으로서, 분위기가스와 혼합된 흄이 쌍롤(3)(3a)측으로 흐르지 않고 주입노즐(2)근방에 설치된 배출구(10)측으로 유도되어 외부배출되어 흄이 롤표면에 흡착되는 것을 적극적으로 방지할수 있기 때문에, 망간또는 산화망간성분을 갖는 흄이 롤표면에 흡착되는 것을 방지하여 쌍롤의 응고가 균일하게 이루어질수 있는 것이다.According to the present invention as described above, the gas supply amount of the first gas supply port is provided with a plurality of discharge ports on the water surface cover corresponding to the central portion of the molten pool, and supply the non-oxidizing gas to the roll side so that a pressure gradient is formed in the atmosphere gas space. By supplying more than the gas supply amount of the second gas supply port for supplying non-oxidizing gas to the water surface side, the fumes mixed with the atmospheric gas do not flow to the twin rolls (3) (3a) side, but to the discharge port (10) side installed near the injection nozzle (2). Since it is possible to actively prevent the fumes adsorbed on the roll surface by being induced outside, the solidification of the twin rolls can be made uniform by preventing the fumes having manganese or manganese oxide components from adsorbing on the roll surface.
그리고, 롤의 균일한 응고로 인하여 주조되는 박판(20)표면에 발생하던 응고크랙이 현저히 감소되고, 응고를 방해하던 망간 및 산화망간이 제거되어 쌍롤의 냉각능이 더욱 향상되어 주조속도를 종래에 비하여 10 내지 15%정도 증가시킬 수 있는 것이다.In addition, solidification cracks occurring on the surface of the thin plate 20 to be cast due to uniform solidification of the roll are significantly reduced, and manganese and manganese oxides that hinder the solidification are removed, thereby further improving the cooling ability of the twin rolls, thereby increasing the casting speed. It can be increased by 10 to 15%.
또한, 주조되는 박판의 폭방향의 온도분포가 균일하게 되어 주조된 금속박판의 품질이 현저히 향상되는 효과가 얻어진다.In addition, the temperature distribution in the width direction of the thin plate to be cast becomes uniform, and the effect of remarkably improving the quality of the cast metal sheet is obtained.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-1999-0056691A KR100419627B1 (en) | 1999-12-10 | 1999-12-10 | Device for venting the fume in twin roll strip casting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-1999-0056691A KR100419627B1 (en) | 1999-12-10 | 1999-12-10 | Device for venting the fume in twin roll strip casting machine |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010055476A KR20010055476A (en) | 2001-07-04 |
KR100419627B1 true KR100419627B1 (en) | 2004-02-25 |
Family
ID=19624993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-1999-0056691A KR100419627B1 (en) | 1999-12-10 | 1999-12-10 | Device for venting the fume in twin roll strip casting machine |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100419627B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108778562A (en) * | 2016-03-18 | 2018-11-09 | 伊苏瓦尔肯联铝业 | Casting Equipment casing with sealing device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100605700B1 (en) * | 2001-08-09 | 2006-08-01 | 주식회사 포스코 | Apparatus for supplying shielding gas on strip casting rolls |
WO2018119548A1 (en) * | 2016-12-26 | 2018-07-05 | 普锐特冶金技术日本有限公司 | Sealing method, sealing device, and continuous casting apparatus provided with the sealing device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61135454A (en) * | 1984-12-06 | 1986-06-23 | Kawasaki Steel Corp | Apparatus for producing thin metallic strip |
WO1993022087A1 (en) * | 1992-04-24 | 1993-11-11 | Ishikawajima-Harmia Heavy Industries Company Limited | Vapor extraction in continuous strip casting |
JPH08206793A (en) * | 1994-11-30 | 1996-08-13 | Usinor Sacilor Sa | Continuous casting apparatus between rolls with inactive enclosure |
KR20010055475A (en) * | 1999-12-10 | 2001-07-04 | 이구택 | Device for sealing atmosphere gas in twin roll strip casting machine |
-
1999
- 1999-12-10 KR KR10-1999-0056691A patent/KR100419627B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61135454A (en) * | 1984-12-06 | 1986-06-23 | Kawasaki Steel Corp | Apparatus for producing thin metallic strip |
WO1993022087A1 (en) * | 1992-04-24 | 1993-11-11 | Ishikawajima-Harmia Heavy Industries Company Limited | Vapor extraction in continuous strip casting |
JPH08206793A (en) * | 1994-11-30 | 1996-08-13 | Usinor Sacilor Sa | Continuous casting apparatus between rolls with inactive enclosure |
KR20010055475A (en) * | 1999-12-10 | 2001-07-04 | 이구택 | Device for sealing atmosphere gas in twin roll strip casting machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108778562A (en) * | 2016-03-18 | 2018-11-09 | 伊苏瓦尔肯联铝业 | Casting Equipment casing with sealing device |
CN108778562B (en) * | 2016-03-18 | 2020-06-23 | 伊苏瓦尔肯联铝业 | Casting equipment casing with sealing device |
Also Published As
Publication number | Publication date |
---|---|
KR20010055476A (en) | 2001-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR950001385B1 (en) | Method of and apparatus for continuously casting a metal sheet | |
KR100419627B1 (en) | Device for venting the fume in twin roll strip casting machine | |
JP3741705B2 (en) | Prevention device for roll surface contamination and slab edge unsolidification in twin roll type thin plate casting machine. | |
JPH0581345B2 (en) | ||
JPH08309489A (en) | Twin drum type casting machine | |
KR100514810B1 (en) | Apparatus for covering casting roll | |
JPH01271037A (en) | Method for casting strip by twin roll type continuous casting machine | |
KR100960322B1 (en) | The entry nozzle for twill roll strip caster | |
KR100395113B1 (en) | Device for preventing scum entrapment in twin roll strip casting machine | |
KR100605700B1 (en) | Apparatus for supplying shielding gas on strip casting rolls | |
KR100650559B1 (en) | A method and apparatus for preventing surface dent defect in twin-roll strip casting | |
JPH072130Y2 (en) | Twin-drum type continuous strip casting equipment | |
KR20170055087A (en) | Twin roll strip caster and casting method of it | |
KR100605706B1 (en) | Method for preventing hot band of hot strip in twin-roll strip casting process | |
KR100605697B1 (en) | Methods of manufacturing good quality of strip with twin roll strip casting apparatus and apparatus of vapor blower used therein | |
KR100518328B1 (en) | An apparatus for controlling the strip edge shape and internal quality in twin roll strip caster | |
KR20000070345A (en) | How to avoid contact between oxygen and molten metal | |
JPH0729184B2 (en) | Continuous casting equipment for thin cast pieces | |
KR950008974Y1 (en) | Device for prevention slag mixing of sheet casting | |
KR200296394Y1 (en) | Apparatus for sealing edge dam in strip casting process | |
JP2002273549A (en) | Device for protecting molten steel surface in sheet steel continuous casting | |
KR100977771B1 (en) | Apparatus for preventing pollution of camera window in the twin roll type strip caster | |
KR20030018691A (en) | A method for preventing strip edge bulging in twin roll strip casting process | |
KR20000012735U (en) | Scum removing device of twin roll sheet metal casting equipment | |
KR19990051830A (en) | Oxidation scale formation prevention method and apparatus thereof in twin roll type sheet casting device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20130208 Year of fee payment: 10 |
|
FPAY | Annual fee payment |
Payment date: 20140207 Year of fee payment: 11 |
|
FPAY | Annual fee payment |
Payment date: 20150210 Year of fee payment: 12 |
|
FPAY | Annual fee payment |
Payment date: 20160211 Year of fee payment: 13 |
|
FPAY | Annual fee payment |
Payment date: 20170208 Year of fee payment: 14 |
|
FPAY | Annual fee payment |
Payment date: 20180202 Year of fee payment: 15 |