KR20020052852A - Device for keeping warmth of melting steel in ladle - Google Patents

Device for keeping warmth of melting steel in ladle Download PDF

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Publication number
KR20020052852A
KR20020052852A KR1020000082320A KR20000082320A KR20020052852A KR 20020052852 A KR20020052852 A KR 20020052852A KR 1020000082320 A KR1020000082320 A KR 1020000082320A KR 20000082320 A KR20000082320 A KR 20000082320A KR 20020052852 A KR20020052852 A KR 20020052852A
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KR
South Korea
Prior art keywords
ladle
molten steel
cover
nozzle
winch motor
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KR1020000082320A
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Korean (ko)
Inventor
김종욱
현진섭
최인영
Original Assignee
이구택
주식회사 포스코
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Priority to KR1020000082320A priority Critical patent/KR20020052852A/en
Publication of KR20020052852A publication Critical patent/KR20020052852A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/12Travelling ladles or similar containers; Cars for ladles
    • B22D41/13Ladle turrets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01Heating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50Pouring-nozzles

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

Abstract

PURPOSE: A device for keeping warmth of molten steel in a ladle is provided which prevents deterioration of temperature of molten steel. CONSTITUTION: The device for keeping warmth of molten steel in a ladle comprising a cover(10) covering the ladle, a heat insulation cover(12) installed on the lower part of the cover(10), a winch motor(22) installed on the upper surface of the heat insulation cover(12), and a wire(20) which is coiled on the winch motor(22), and one end of which is connected to the upper surface of the heat insulation cover(12), wherein the device further comprises a flame ejection rod(40) installed at the inner center of the heat insulation cover(12), a nozzle(42) which penetrates the heat insulation cover(12) and jets a combustible gas to the surroundings of the flame ejection rod(40), and a flexible hose(44) which is connected to the upper part of the nozzle(42) to supply the combustible gas to the nozzle(42).

Description

래들내의 용강보온장치{DEVICE FOR KEEPING WARMTH OF MELTING STEEL IN LADLE}Molten steel thermostat in ladle {DEVICE FOR KEEPING WARMTH OF MELTING STEEL IN LADLE}

본 발명은 철강공장의 연속주조설비에 관한 것으로, 특히 래들터렛에 장착된래들내의 용강보온장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting facility in a steel mill, and more particularly to a molten steel thermal insulation device in a ladle mounted on a ladle turret.

일반적으로 연속주조설비는 정련로에서 정련된 용강을 연주기를 통하여 연속주조하여 중간재인 블룸이나 슬라브같은 주편을 생산한다.In general, continuous casting equipment continuously casts molten steel refined in a refining furnace through a machine to produce casts such as bloom or slab, which are intermediate materials.

이러한 연주설비에서는 레들의 용강을 보온하기 위하여 레들위에 보온커버를 씌어 용강을 보온하게 된다.In such a performance facility, to insulate the molten steel of the ladle, the insulation cover is put on the ladle to insulate the molten steel.

여기서 종래기술에 따른 연주설비를 도 3을 이용하여 좀더 상세하게 살펴본다.Here, look at the playing equipment according to the prior art in more detail using FIG.

연주설비에서는 정련을 마친 레들(80)이 회동가능한 레들터렛(82)에 거치되고 이 레들터렛(82)에 거치된 레들(80)로부터 턴디시(84)에 용강이 주입되며 턴디시(84)에 일시 저장된 용강이 몰드(86)에서 응고셀이 형성되고 응고셀이 형성된 주편은 구동롤(88)에 의해서 반출된다.In the performance facility, the polished ladle 80 is mounted on the rotatable ladle turret 82, and molten steel is injected into the tundish 84 from the ladle 80 mounted on the ladle turret 82, and the tundish 84 is provided. The molten steel temporarily stored in the mold 86 forms a coagulation cell, and the slab on which the coagulation cell is formed is carried out by the driving roll 88.

또한 연속주조시간이 통상 45분에서 90분이 소요되므로 용강의 온도 강하를 방지하기 위하여 보온커버(90)를 레들(80)의 상부에 씌우게 된다.In addition, since the continuous casting time is usually 45 minutes to 90 minutes to cover the upper portion of the ladle 80 to prevent the temperature drop of the molten steel.

그러나 연주작업이 진행되는 도중에 돌발상황이 발생하게 되면 용강이 장시간 대기하게 되므로 용강의 온도가 저하되어 용강이 응고되면서 노즐을 폐쇄시키는 클로깅(Clogging)이 발생되는 문제점이 있다.However, if a sudden situation occurs during the playing operation, the molten steel waits for a long time, so that the temperature of the molten steel decreases, thereby causing clogging to close the nozzle while the molten steel solidifies.

또한 커버와 레들사이의 밀착성이 떨어지므로 공기가 레들내에 유입되어 용강과 반응하여 산화성 개재물을 형성시킨다. 따라서 산화성 개재물이 용강에 침투되어 품질을 저하시키는 문제점이 있다.In addition, since the adhesion between the cover and the ladle is poor, air is introduced into the ladle to react with the molten steel to form an oxidative inclusion. Therefore, there is a problem in that the oxidative inclusions penetrate into the molten steel and degrade the quality.

이에 본 발명의 상기한 문제점을 해결하기 위하여 안출된 것으로, 용강의 온도가 저하되는 것을 방지하도록 된 레들내의 용강보온장치를 제공하는데 그 목적이 있다.Accordingly, an object of the present invention is to provide a molten steel thermal insulation device in a ladle that is designed to prevent the temperature of molten steel from decreasing.

또한 용강에 공기의 침투를 방지하도록 된 레들내의 용강보온장치를 제공하는데 또 다른 목적이 있다.Another object is to provide a molten steel thermostat in a ladle that is intended to prevent the penetration of air into the molten steel.

도 1은 본 발명에 따른 래들내의 용강보온장치를 나타내는 부분절개 사시도이다.1 is a partial cutaway perspective view showing a molten steel thermostat in a ladle according to the present invention.

도 2는 본 발명에 따른 래들내의 용강보온장치가 설치된 연주설비의 개략구성도이다.Figure 2 is a schematic configuration diagram of the playing equipment is installed molten steel thermal insulation device in the ladle according to the present invention.

도 3은 종래기술에 따른 연주설비의 개략구성도이다.3 is a schematic configuration diagram of a performance equipment according to the prior art.

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

10 : 커버 12 : 보온커버10 cover 12 heat cover

20 : 와이어 22 : 윈치모터20: wire 22: winch motor

30 : 브라켓 32 : 로드30: bracket 32: rod

34 : 구동실린더 40 : 화염분산봉34: driving cylinder 40: flame dispersion rod

42 : 노즐 44 : 플렉시블호스42: nozzle 44: flexible hose

상기한 바와 같은 목적을 달성하기 위하여 본 발명은 레들을 덮는 커버, 커버의 하부에 설치되는 보온커버, 상기 보온커버의 윗면에 설치되는 윈치모터, 윈치모터에 권취되고 일단이 상기 보온커버의 윗면에 연결설치되는 와이어를 포함하는 레들내의 용강보온장치를 제공한다.In order to achieve the object as described above, the present invention is a cover covering a ladle, a thermal cover installed on the lower portion of the cover, a winch motor installed on the upper surface of the thermal cover, the winch motor is wound on one end of the thermal cover Provided is a molten steel thermostat in a ladle including a wire to be connected and installed.

또한 레들내의 용강을 가열하도록 설치된 가열장치를 더욱 포함한다.It further includes a heating device installed to heat the molten steel in the ladle.

이하 본 발명의 일실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 레들내의 용강보온장치를 나타내는 부분절개 사시도이고, 도 2는 본 발명에 따른 레들내의 용강보온장치가 설치된 연주설비를 나타내는 개략구성도이다.1 is a partial cutaway perspective view showing a molten steel thermal insulation device in the ladle according to the present invention, Figure 2 is a schematic configuration diagram showing the performance equipment installed in the molten steel thermal insulation apparatus in the ladle according to the present invention.

본발명은 레들(80)의 상부를 덮는 커버(10)와 커버(10)의 하부에 설치되는 보온커버(12), 보온커버(12)의 윗면에 설치되는 윈치모터(22), 윈치모터(22)에 권취되고 일단이 보온커버(12)의 윗면에 연결설치되는 와이어(20)로 이루어진다.The present invention covers the upper portion of the ladle 80, the heat insulating cover 12 is installed on the lower portion of the cover 10, the winch motor 22 is installed on the upper surface of the heat cover 12, the winch motor ( It is wound on 22) and one end is made of a wire 20 connected to the upper surface of the insulating cover 12.

먼저 커버(10)는 레들(80)의 상부를 덮을 수 있도록 원형의 철피와 철피의하면에 형성된 부정형내화물(10a)층으로 이루어지며 레들터렛(82)에 설치되어 브라켓(30)에 의해 회동가능하도록 설치된다. 여기서 커버(10)는 브라켓(30)의 일측선단에 고정설치되고 이 브라켓(30)의 측면에 브라켓(30)을 관통하는 로드(32)가 삽입된다. 또한 이 로드(32)는 레들터렛(82)의 상부에서 돌출된 돌출바(32a)의 선단을 가로질러 브라켓(30)이 회동가능하게 설치된다. 한편 구동실린더(34)는 일측은 레들터렛(34)에 연결설치되고 타측은 브라켓(30)의 타측선단에 힌지결합된다. 따라서 구동실린더(34)가 작동되면 브라켓(30)이 로드(32)를 중심으로 회동하게 된다.First, the cover 10 is composed of a circular iron shell and an irregular refractory 10a layer formed on the bottom surface of the iron shell so as to cover the upper portion of the ladle 80, and is installed on the ladle turret 82 and is rotatable by the bracket 30. To be installed. In this case, the cover 10 is fixedly installed at one end of the bracket 30, and a rod 32 penetrating the bracket 30 is inserted into the side surface of the bracket 30. In addition, the rod 32 is rotatably mounted to the bracket 30 across the tip of the protruding bar (32a) protruding from the upper portion of the ladle turret (82). On the other hand, the driving cylinder 34 is one side is connected to the ladle turret 34 and the other side is hinged to the other end of the bracket (30). Therefore, when the driving cylinder 34 is operated, the bracket 30 rotates around the rod 32.

다음으로 보온커버(12)는 커버(10)의 하부에 설치되고 철피와 철피의 내측에 도포된 부정형내화물(12a)로 이루어지며 외주면이 레들(80)의 내면과 밀착되도록 설치되어 외부공기와 출입이 차단되므로 용강을 보온한게 된다.Next, the heat insulating cover 12 is installed in the lower portion of the cover 10 and made of iron and iron coated with an irregular refractory (12a) and the outer peripheral surface is installed so as to be in close contact with the inner surface of the ladle (80) This will block the molten steel.

다음으로 윈치모터(22)는 커버(10)의 윗면에 고정설치되고 윈치모터(22)가 작동되므로 윈치모터(22)에 권취되는 와이어(20)가 보온커버(12)를 승하강하게 된다.Next, the winch motor 22 is fixedly installed on the upper surface of the cover 10 and the winch motor 22 is operated, so that the wire 20 wound around the winch motor 22 raises and lowers the thermal cover 12.

다음으로 와이어(20)는 윈치모터(22)에 권취되고 일단이 보온커버(12)의 윗면에 연결설치된다. 따라서 윈치모터(22)가 작동되면 와이어(20)가 권상되고 와이어(20)가 권상되면 와이어(20)에 연결설치된 보온커버(12)가 상승하게 된다.Next, the wire 20 is wound around the winch motor 22 and one end is connected to the upper surface of the insulating cover 12. Therefore, when the winch motor 22 is operated, the wire 20 is wound up, and when the wire 20 is wound up, the thermal cover 12 connected to the wire 20 is raised.

다음으로 가열장치는 보온커버(12)의 내측 중심에 고정설치된 화염분산봉(40)과 화염분산봉(40) 주위에 가연성기체를 분출하는 노즐(42)과 노즐(42)의 상부에 연결설치되어 노즐(42)에 가연성기체를 공급하는 플렉시블호스(44)로 이루어진다.Next, the heating device is connected to the nozzle 42 and the upper part of the nozzle 42 for ejecting a flammable gas around the flame dispersion rod 40 and the flame dispersion rod 40 fixedly installed at the inner center of the thermal cover 12. And a flexible hose 44 which supplies a combustible gas to the nozzle 42.

화염분산봉(40)은 보온커버(12)의 내측 중심에서 하부로 돌출된 환봉으로 선단이 콘으로 형성된다. 따라서 노즐(42)로부터 분사된 가연성기체가 발화하여 화염이 형성되고 형성된 화염이 화염분산봉(40)을 지나 분산되어 용강과 탕면위에 골고루 분출된다.Flame dispersion rod 40 is a round bar that protrudes from the inner center of the heat insulating cover 12 to the lower end is formed of a cone. Therefore, the flammable gas injected from the nozzle 42 ignites to form a flame, and the formed flame is dispersed through the flame dispersion rod 40 and evenly sprayed on the molten steel and the hot water surface.

노즐(42)은 보온커버(12)를 관통하여 설치되며 화염분산봉(40)의 주위에 가연성기체를 분사하게 된다. 여기서 노즐(42)의 각도는 가연성기체가 화염분산봉(40)의 중심에 하향경사지게 분사되어 화염분산봉(40)에 위해 화염이 분사된다.The nozzle 42 is installed through the heat insulating cover 12 to inject a flammable gas around the flame dispersion rod 40. Here, the angle of the nozzle 42 is a flammable gas is injected inclined downward to the center of the flame dispersion rod 40, the flame is injected to the flame dispersion rod 40.

여기서 가연성기체는 제철소의 코크스 건류과정에서 다량 발생되는 코크스오븐가스(Coke Oven Gas)를 사용함이 바람직하다.Here, the combustible gas is preferably to use the coke oven gas (Coke Oven Gas) generated in the coke distillation process of the steel mill.

플렉시블호스(44)는 노즐(42)의 상부에 연결설치되어 노즐(42)에 가연성기체를 공급하는데 플렉시블호스(44)의 일단은 가연성기체의 공급원에 연결되고 타단은 노즐(42)에 연결되어 가연성기체가 노즐(42)에 공급된다. 따라서 가연성기체가 노즐(42)에 공급되므로 노즐(42)을 통하여 가연성기체가 레들(80)의 내부에 분사되므로 화염이 발생되어 용강을 가열하게 된다.The flexible hose 44 is connected to the upper part of the nozzle 42 to supply the combustible gas to the nozzle 42. One end of the flexible hose 44 is connected to the supply source of the combustible gas and the other end is connected to the nozzle 42. Combustible gas is supplied to the nozzle 42. Therefore, since the combustible gas is supplied to the nozzle 42, the combustible gas is injected into the ladle 80 through the nozzle 42, so that a flame is generated to heat the molten steel.

이하 본 발명의 작동에 대해 설명하면 다음과 같다.Hereinafter will be described the operation of the present invention.

정련을 마친 용강을 수용하고 있는 레들(80)이 레들터렛(82)위에 안착되면 구동실린더(34)가 작동하여 브라켓(30)이 회동하게 된다. 브라켓(30)이 회동하게 되므로 브라켓(30)에 고정설치된 커버(10)가 회전하여 레들(80)의 상부가 밀폐된다.When the ladle 80 containing the refined molten steel is seated on the ladle turret 82, the drive cylinder 34 is operated to rotate the bracket 30. Since the bracket 30 is rotated, the cover 10 fixed to the bracket 30 rotates to seal the upper portion of the ladle 80.

레들(80)이 선행하는 레들의 용강이 턴디시(84)에 주입될 때 용강의 온도가 하강하게 되므로 플렉시블호스(44)를 통하여 가연성기체를 노즐(42)에 공급하게 된다. 노즐(42)에서 분사된 가연성기체는 발화하여 화염이 콘형태의 화염분산봉(40)에 부딪혀 분산된다. 따라서 용강과 탕면에 분산된 화염이 레들의 내부를 가열하여 용강온도의 떨어지는 것을 방지해준다.Since the temperature of the molten steel is lowered when the molten steel of the ladle 80 is introduced into the tundish 84, the combustible gas is supplied to the nozzle 42 through the flexible hose 44. The combustible gas sprayed from the nozzle 42 ignites so that the flame strikes the cone-shaped flame dispersing rod 40 and is dispersed. Therefore, the flames dispersed in the molten steel and the water surface heat the inside of the ladle to prevent the temperature of the molten steel from falling.

선행하는 레들의 용강이 턴디시(84)에 모두 주입되면 레들터렛(82)을 회전시키고 레들(80)의 슬라이딩노즐을 개방하여 용강을 턴디시(84)에 주입시킨다.When the molten steel of the preceding ladle is injected into the tundish 84, the ladle turret 82 is rotated and the sliding nozzle of the ladle 80 is opened to inject the molten steel into the tundish 84.

레들(80)내의 용강이 턴디시(84)에 주입됨에 따라 탕면이 내려가게 되는데 이 때 탕면이 내려간 길이만큼 윈치모터(22)를 작동시켜 와이어(20)를 하강시킨다. 따라서 와이어(20)에 연결설치된 보온커버(12)가 하강하게 되어 용강의 탕면과 보온커버의 간격을 유지하므로 용강의 열이 외부로 빠져나가지 못하게 된다.As the molten steel in the ladle 80 is injected into the tundish 84, the molten steel is lowered. At this time, the winch motor 22 is operated as much as the length of the molten steel is lowered to lower the wire 20. Therefore, the insulation cover 12 connected to the wire 20 is lowered to maintain the gap between the hot water surface and the insulation cover of the molten steel so that the heat of the molten steel does not escape to the outside.

레들(80)의 용강이 모두 턴디쉬(84)에 주입되면 슬라이딩노즐을 폐쇄시키고 레들터렛(82)을 회전시킨다. 이 때 턴디시(84)의 용강이 몰드(86)로 전부 주입되기 전에 용강이 턴디시(84)에 주입되어 연주가 끊기지 않고 연연주되도록 한다.When the molten steel of the ladle 80 is injected into the tundish 84, the sliding nozzle is closed and the ladle turret 82 is rotated. At this time, before all the molten steel of the tundish 84 is injected into the mold 86, the molten steel is injected into the tundish 84 so that the performance is performed without interruption.

또한 용강이 모두 턴디시(84)에 주입된 슬라이딩노즐이 닫혀진 레들(80)은 플렉시블호스(44)에 가연성기체의 공급을 차단하고, 윈치모터(22)를 작동시켜 보온커버(12)를 상승시킨다. 보온커버(12)가 상승되면 커버(10)를 회전시키고 크레인으로 레들(80)을 권상하여 레들처리장으로 이송시킨 후 레들(80)에 남아있는 슬래그를 처리한다.In addition, the ladle 80 in which the sliding nozzles in which molten steel is injected into the tundish 84 is closed, shuts off the supply of the combustible gas to the flexible hose 44, and operates the winch motor 22 to raise the thermal cover 12. Let's do it. When the thermal cover 12 is raised, the cover 10 is rotated and the ladle 80 is hoisted by a crane to be transferred to the ladle processing plant, and the slag remaining in the ladle 80 is processed.

이상 설명한 바와 같은 본 발명에 따른 레들내의 용강보온장치는 용강이 장시간 대기 하더라도 용강의 온도가 급격히 떨어지는 것이 방지되므로 용강의 클로깅이 방지된다. 따라서 정비시간이 줄어들어 가동시간이 길어지므로 생산상이 향상된다.As described above, the molten steel thermal insulation device in the ladle according to the present invention prevents the temperature of the molten steel from falling sharply even when the molten steel waits for a long time, thereby preventing the clogging of the molten steel. Therefore, the maintenance time is reduced and the uptime is longer, so the production phase is improved.

또한 커버와 보온커버가 설치되어 이중으로 용강이 밀폐되므로 공기의 침투를 막아 산화성개재물의 형성을 방지하게 된다. 따라서 고품질의 제품을 생산할수 있게 된다.In addition, since the cover and the heat insulating cover is installed, the molten steel is double sealed to prevent the penetration of air to prevent the formation of oxidative inclusions. Therefore, high quality products can be produced.

Claims (2)

레들을 덮는 커버, 상기 커버의 하부에 설치되는 보온커버, 상기 보온커버의 윗면에 설치되는 윈치모터, 상기 윈치모터에 권취되고 일단이 상기 보온커버의 윗면에 연결설치되는 와이어를 포함하는 레들내의 용강보온장치.Molten steel in the ladle comprising a cover covering the ladle, a heat insulating cover installed on the lower portion of the cover, a winch motor installed on the upper surface of the heat insulating cover, a wire wound on the winch motor and one end connected to the top surface of the heat insulating cover Thermostat. 제 1 항에 있어서,The method of claim 1, 상기 보온커버의 내측 중심에 설치된 화염분산봉, 상기 보온커버를 관통하여 설치되며 상기 화염분산봉의 주위에 가연성기체를 분출하는 노즐, 상기 노즐의 상부에 연결설치되어 노즐에 가연성기체를 공급하는 플렉시블호스로 이루어지는 가열장치를 더욱 포함하는 래들내의 용강보온장치.A flame dispersing rod installed in the inner center of the insulating cover, a nozzle which penetrates the insulating cover and sprays flammable gas around the flame dispersing rod, and is connected to an upper portion of the nozzle to supply a flammable gas to the nozzle. A molten steel thermostat in a ladle further comprising a heating device.
KR1020000082320A 2000-12-26 2000-12-26 Device for keeping warmth of melting steel in ladle KR20020052852A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047914B1 (en) * 2008-12-30 2011-07-08 주식회사 포스코 Molten steel refinery, auxiliary cover thereof and replacement method thereof
CN103464731A (en) * 2012-06-06 2013-12-25 江苏迪萨机械有限公司 Electro-hydraulic drive M-shaped steel ladle capping and decapping device
KR101461573B1 (en) * 2012-12-27 2014-11-13 주식회사 포스코 Cover and covering device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047914B1 (en) * 2008-12-30 2011-07-08 주식회사 포스코 Molten steel refinery, auxiliary cover thereof and replacement method thereof
CN103464731A (en) * 2012-06-06 2013-12-25 江苏迪萨机械有限公司 Electro-hydraulic drive M-shaped steel ladle capping and decapping device
KR101461573B1 (en) * 2012-12-27 2014-11-13 주식회사 포스코 Cover and covering device

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