KR20020051477A - Electromagnetic heating apparatus for molten steel in the ladle - Google Patents
Electromagnetic heating apparatus for molten steel in the ladle Download PDFInfo
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- KR20020051477A KR20020051477A KR1020000080551A KR20000080551A KR20020051477A KR 20020051477 A KR20020051477 A KR 20020051477A KR 1020000080551 A KR1020000080551 A KR 1020000080551A KR 20000080551 A KR20000080551 A KR 20000080551A KR 20020051477 A KR20020051477 A KR 20020051477A
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- South Korea
- Prior art keywords
- molten steel
- ladle
- reflux tube
- heating
- reflux
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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
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
본 발명은 제강 공정 및 연속 주조 공정에서 발생하는 용강의 온도 하강을 전자기장을 이용하여 보상하여 연속주조시에 래들 내의 용강을 가열하여 용강의 온도를 상승시킴으로써 주조 가능한 상태를 유지하게 하는 전자기장을 이용한 래들 내부의 용강 가열장치에 관한 것으로, 래들 내부의 용강을 가열시키는 장치에 있어서, 상기 래들(2)의 상부에 양단이 용강(1)에 침지되어 용강(1)이 환류되는 환류관(3)과, 상기 환류관(3)의 외주에는 용강(1)에 2차 유도전류를 인가시키는 트랜스포머(4)와, 상기 용강(1)을 환류시키는 전자기펌프(5)와, 상기 환류관(3) 내부를 진공상태로 만들어 용강(1)을 상승시키는 진공장치(6)를 포함하여 구성됨을 특징으로 하여, 용강을 효과적으로 승온시킴으로써 용강이 제강 공정으로 회송되지 않고 계속 주조할 수 있게 되어 원가를 절감하고 생산성을 향상시킬 수 있는 효과가 있게 된다The present invention provides a ladle using an electromagnetic field that compensates for a temperature drop of molten steel generated in a steelmaking process and a continuous casting process by using an electromagnetic field to maintain molten steel by heating the molten steel in a ladle during continuous casting to raise the temperature of the molten steel. An apparatus for heating molten steel in an interior, comprising: a reflux tube (3) having both ends immersed in the molten steel (1) at an upper portion of the ladle (2) to reflux the molten steel (1); In the outer circumference of the reflux tube (3), a transformer (4) for applying a secondary induction current to the molten steel (1), an electromagnetic pump (5) for refluxing the molten steel (1), and inside the reflux tube (3) It is characterized in that it comprises a vacuum device (6) for raising the molten steel (1) by making a vacuum state, by effectively raising the molten steel can be continuously cast without being returned to the steelmaking process And thereby reduce the effect of improving productivity
Description
본 발명은 제강 공정 및 연속 주조 공정에서 발생하는 용강의 온도 하강을 전자기장을 이용하여 보상하여 연속주조시에 래들 내의 용강을 가열하여 용강의 온도를 상승시킴으로써 주조 가능한 상태를 유지하게 하는 전자기장을 이용한 래들 내부의 용강 가열장치에 관한 것이다.The present invention provides a ladle using an electromagnetic field that compensates for a temperature drop of molten steel generated in a steelmaking process and a continuous casting process by using an electromagnetic field to maintain molten steel by heating the molten steel in a ladle during continuous casting to raise the temperature of the molten steel. It relates to an internal molten steel heating device.
일반적으로 연주 공정에서 문제가 발생하여 대기하거나 연주 작업 중에 용강의 온도가 낮아지는 경우 주조가 불가능하게 된다.In general, casting will not be possible if a problem occurs during the playing process, or if the temperature of the molten steel decreases during the playing operation.
종래에는 턴디쉬 내의 용강 온도가 떨어지면 용강을 제강 공정으로 회송시켜 전로, LF, RH 공정을 다시 거치게 하였다. 그러나 이와 같은 종래의 방법에 의하면 주조 작업은 일시 중단하여야 하고, 이 경우 승온뿐만 아니라 성분 조절까지 다시 하게 되어 생산성의 저하 및 원가의 상승이라는 문제점이 있었다.Conventionally, when the molten steel temperature in the tundish drops, the molten steel is returned to the steelmaking process to undergo the converter, LF, and RH processes again. However, according to such a conventional method, the casting operation has to be temporarily suspended, and in this case, not only the temperature rise but also the component adjustment is performed again, which has a problem of lowering productivity and increasing cost.
또한 종래에는 직류 아크(Arc)를 이용하여 탄소전극으로 아크 가열하는 방법이 있었으나, 이러한 종래의 장치에 의하면 탄소가 용강에 용존되어 용강의 성분이 변화되는 문제점이 있었다.In addition, there has been a conventional method of arc heating with a carbon electrode using a direct current arc, but according to the conventional apparatus, there is a problem in that carbon is dissolved in molten steel and the composition of molten steel is changed.
본 발명은 상기와 같은 종래 기술에 있어서의 문제점을 해결하기 위하여 발명된 것으로, 래들 상부에 용강을 순환시킬 수 있는 내화물 관을 침지시키고 트랜스포머(Transformer)를 이용하여 순환 관에 유도전류를 인가하여 유도전류에 의하여 용융금속을 가열함으로써, 온도가 떨어진 용강을 제강 공정으로 회송시키지 않고 용강을 래들 내에서 가열하여 연주 작업을 계속하게 하는 전자기장을 이용한 래들 내부의 용강 가열장치를 제공함을 그 목적으로 한다.The present invention was invented to solve the problems in the prior art as described above, by immersing a refractory tube capable of circulating molten steel on the upper ladle and induction by applying an induced current to the circulation tube using a transformer (Transformer) It is an object of the present invention to provide a molten steel heating device in a ladle using an electromagnetic field, by heating molten metal by electric current to heat molten steel in the ladle without continuing to return to the steelmaking process.
도 1은 본 발명에 의한 가열 장치의 개략도.1 is a schematic view of a heating apparatus according to the present invention.
도 2는 인가된 1차전류에 따른 상승된 온도를 나타내는 그래프.2 is a graph showing an elevated temperature according to an applied primary current.
〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1 : 용강2 : 래들1: molten steel 2: ladle
3 : 환류관4 : 트랜스포머3: reflux tube 4: transformer
5 : 전자기펌프6 : 진공장치5: electromagnetic pump 6: vacuum device
상기의 목적을 달성하기 위한 본 발명의 전자기장을 이용한 래들 내부의 용강 가열장치는, 래들 내부의 용강을 가열시키는 장치에 있어서, 상기 래들(2)의 상부에 양단이 용강(1)에 침지되어 용강(1)이 환류되는 환류관(3)과, 상기 환류관(3)의 외주에는 용강(1)에 2차 유도전류를 인가시키는 트랜스포머(4)와, 상기 용강(1)을 환류시키는 전자기펌프(5)와, 상기 환류관(3) 내부를 진공상태로 만들어용강(1)을 상승시키는 진공장치(6)를 포함하여 구성됨을 특징으로 한다.In the apparatus for heating molten steel in the ladle using the electromagnetic field of the present invention for achieving the above object, in the apparatus for heating the molten steel in the ladle, both ends are immersed in the molten steel (1) on the upper portion of the ladle (2) A reflux tube (3) in which (1) is refluxed, a transformer (4) for applying a secondary induction current to the molten steel (1) on the outer circumference of the reflux tube (3), and an electromagnetic pump for refluxing the molten steel (1) (5) and the vacuum device 6 for raising the molten steel 1 by making the inside of the reflux tube 3 in a vacuum state.
또한 본 발명은 상기 트랜스포머(5)를 통하여 인가되는 교류전류의 주파수는 50 ~ 1,000Hz로 하는 것을 특징으로 한다.In addition, the present invention is characterized in that the frequency of the alternating current applied through the transformer 5 is 50 ~ 1,000Hz.
이하에서는 첨부도면을 참조하여 본 발명에 대하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.
도 1은 본 발명에 의한 가열 장치의 개략도로서, 본 발명은 용강(1)을 담아두는 래들(2)과, 입구 및 출구가 용강(1)에 침지되어 용강(1)이 환류되는 환류관(3)과, 용강(1)에 유도전류 인가하여 용강(1)을 가열시키는 트랜스포머(4)와, 용강(1)을 환류시키기 위한 전자기펌프(5)와, 용강(1)을 환류시키기 위한 초기에 환류관(3) 내부를 진공상태로 유지함으로써 래들(2) 내의 용강(1)을 상승시키는 진공장치(6)로 구성되어 있다.1 is a schematic view of a heating apparatus according to the present invention, the present invention is a ladle (2) containing the molten steel (1), and the inlet and outlet is immersed in the molten steel (1) reflux tube (1) is refluxed ( 3), a transformer 4 for heating the molten steel 1 by applying an induced current to the molten steel 1, an electromagnetic pump 5 for refluxing the molten steel 1, and an initial stage for refluxing the molten steel 1 It consists of the vacuum apparatus 6 which raises the molten steel 1 in the ladle 2 by maintaining the inside of the reflux tube 3 in a vacuum state.
이하에서는 상기와 같이 구성된 본 발명의 작용에 대하여 상세히 설명한다.Hereinafter will be described in detail the operation of the present invention configured as described above.
환류관(3) 내에서 용강(1)을 가열하려면 환류관(3) 내에 용강(1)을 충만시키는 것이 필요하다. 진공장치(6)를 이용하여 환류관(3)의 압력을 낮추면 용강(1)이 환류관(3)으로 빨려 올라오게 되며 환류관(3) 내에 용강(1)이 충만되면 진공장치(6)와 연결된 부분을 폐쇄한다.In order to heat the molten steel 1 in the reflux tube 3, it is necessary to fill the molten steel 1 in the reflux tube 3. When the pressure of the reflux tube 3 is reduced by using the vacuum apparatus 6, the molten steel 1 is sucked up into the reflux tube 3, and when the molten steel 1 is filled in the reflux tube 3, the vacuum apparatus 6 is reduced. Close the part connected with.
환류관(3) 내에 용강(1)이 충만되면 트랜스포머(4)를 이용하여 용강(1)에 전류를 인가하여 2차 유도전류에 의하여 용강(1)을 가열하고 가열된 용강(1)은 전자기펌프(5)로 순환시킨다.When the molten steel 1 is filled in the reflux tube 3, a current is applied to the molten steel 1 using the transformer 4 to heat the molten steel 1 by the secondary induction current, and the heated molten steel 1 is electromagnetically charged. Circulation to the pump (5).
상기 용강(1)이 가열되는 원리를 설명하면, 트랜스포머(4)의 적층 코어가 환류관(3)을 둘러싸고 있으며 이 적층 코어 부분을 수냉 동 코일로 적정 횟수를 감은후 동 코일에 교류전류를 인가하면 적층 코어에 자장이 유도되고, 이 자장에 의해 환류관 내부의 용강(1)에 유도된 2차 유도전류가 용융금속인 용강(1)이 가열된다.Referring to the principle that the molten steel 1 is heated, the laminated core of the transformer 4 surrounds the reflux tube 3, and after winding the appropriate number of times with the water-cooled copper coil, an alternating current is applied to the copper coil. A magnetic field is induced in the laminated core at the lower surface, and the molten metal 1 whose secondary induced current induced in the molten steel 1 inside the reflux tube is molten metal is heated by the magnetic field.
상기 2차 유도전류는 1차 인가전류와 코일의 권선수를 곱한 값이 되며 용강(1)에 발생되는 발열량은 환류관(3)의 단면적과 길이에 따라 결정된다.The secondary induction current is a value obtained by multiplying the primary applied current by the number of turns of the coil, and the amount of heat generated in the molten steel 1 is determined according to the cross-sectional area and length of the reflux tube 3.
상기 트랜스포머(4)에 인가하는 전류는 용강(1)의 전자기 표피 효과에 의해 결정되며, 상용주파수인 50Hz 미만일 경우는 전류를 공급하기 위한 전원 공급장치의 제작비가 많이 들고, 반대로 주파수가 1000Hz를 초과하면 전류가 유도되는 표피 두께(Skin depth)가 얇아져서 효율이 떨어진다.The current applied to the transformer 4 is determined by the electromagnetic skin effect of the molten steel 1, and when the commercial frequency is less than 50 Hz, the production cost of the power supply for supplying the current is high, and the frequency exceeds 1000 Hz. This decreases the skin thickness that leads to the current, which decreases efficiency.
한편, 본 발명에 따라 용융금속 가열정도를 확인하기 위하여 주석을 이용한 실험을 실시하였고, 모의 실험 장치는 환류관(3)을 수평으로 설치하여 용융 주석을 순환시키면서 환류관(3) 내에 열전대를 삽입한 후 10초간 전류를 인가하는 실험을 하였다.Meanwhile, according to the present invention, an experiment using tin was conducted to confirm the degree of heating of the molten metal, and the simulation apparatus installed the reflux tube 3 horizontally to insert a thermocouple into the reflux tube 3 while circulating the molten tin. After that, the experiment was applied for 10 seconds.
상기 실험 결과에 따른 도 2의 인가된 1차전류에 따른 상승된 온도를 나타내는 그래프에 도시된 바와 같이, 전류 세기가 증가하면 발열량은 전류의 제곱에 비례하여 증가함을 알 수 있으며, 계산한 값과 유사함을 알 수 있다.As shown in the graph showing the elevated temperature according to the applied primary current of FIG. 2 according to the experimental result, it can be seen that as the current intensity increases, the calorific value increases in proportion to the square of the current. It can be seen that similar to.
이상에서 상세히 설명한 바와 같이, 본 발명의 전자기장을 이용한 래들 내부의 용강 가열장치를 사용하면, 용강을 효과적으로 승온시킴으로써 용강이 제강 공정으로 회송되지 않고 계속 주조할 수 있게 되어 원가를 절감하고 생산성을 향상시킬 수 있는 효과가 있게 된다.As described in detail above, by using the molten steel heating apparatus inside the ladle using the electromagnetic field of the present invention, by effectively raising the molten steel, the molten steel can be continuously cast without being returned to the steelmaking process, thereby reducing costs and improving productivity. It can be effective.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000080551A KR20020051477A (en) | 2000-12-22 | 2000-12-22 | Electromagnetic heating apparatus for molten steel in the ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000080551A KR20020051477A (en) | 2000-12-22 | 2000-12-22 | Electromagnetic heating apparatus for molten steel in the ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20020051477A true KR20020051477A (en) | 2002-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020000080551A Ceased KR20020051477A (en) | 2000-12-22 | 2000-12-22 | Electromagnetic heating apparatus for molten steel in the ladle |
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| Country | Link |
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| KR (1) | KR20020051477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990049A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Vacuum ladle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558317A (en) * | 1978-10-27 | 1980-05-01 | Kobe Steel Ltd | Vacuum degassing method of molten steel |
| JPH06145763A (en) * | 1992-11-16 | 1994-05-27 | Nippon Steel Corp | Decompression and vacuum degassing method for molten steel |
| JPH10265832A (en) * | 1997-03-26 | 1998-10-06 | Kobe Steel Ltd | Method for heating molten steel in vacuum degassing apparatus and device therefor |
| KR20000039453A (en) * | 1998-12-14 | 2000-07-05 | 이구택 | Device for refining liquid steel having equipment for heating and flowing back molten metal by ac electromagnetic field |
| KR20010057269A (en) * | 1999-12-21 | 2001-07-04 | 신현준 | Rh-ob apparatus of molten steel using heating divice |
-
2000
- 2000-12-22 KR KR1020000080551A patent/KR20020051477A/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558317A (en) * | 1978-10-27 | 1980-05-01 | Kobe Steel Ltd | Vacuum degassing method of molten steel |
| JPH06145763A (en) * | 1992-11-16 | 1994-05-27 | Nippon Steel Corp | Decompression and vacuum degassing method for molten steel |
| JPH10265832A (en) * | 1997-03-26 | 1998-10-06 | Kobe Steel Ltd | Method for heating molten steel in vacuum degassing apparatus and device therefor |
| KR20000039453A (en) * | 1998-12-14 | 2000-07-05 | 이구택 | Device for refining liquid steel having equipment for heating and flowing back molten metal by ac electromagnetic field |
| KR20010057269A (en) * | 1999-12-21 | 2001-07-04 | 신현준 | Rh-ob apparatus of molten steel using heating divice |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990049A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Vacuum ladle |
| CN102990049B (en) * | 2012-12-24 | 2015-08-05 | 云南云铝涌鑫铝业有限公司 | Vacuum ladle |
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