KR970043120A - RH vacuum degassing apparatus for molten steel refining of high clean ultra low carbon steel and refining method using the same - Google Patents

RH vacuum degassing apparatus for molten steel refining of high clean ultra low carbon steel and refining method using the same Download PDF

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Publication number
KR970043120A
KR970043120A KR1019950061771A KR19950061771A KR970043120A KR 970043120 A KR970043120 A KR 970043120A KR 1019950061771 A KR1019950061771 A KR 1019950061771A KR 19950061771 A KR19950061771 A KR 19950061771A KR 970043120 A KR970043120 A KR 970043120A
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KR
South Korea
Prior art keywords
refining
degassing apparatus
vacuum degassing
molten steel
low carbon
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KR1019950061771A
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Korean (ko)
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KR100213326B1 (en
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안상복
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김종진
포항종합제철 주식회사
신창식
재단법인 산업과학기술연구소
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Priority to KR1019950061771A priority Critical patent/KR100213326B1/en
Publication of KR970043120A publication Critical patent/KR970043120A/en
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Publication of KR100213326B1 publication Critical patent/KR100213326B1/en

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    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/167—Introducing a fluid jet or current into the charge the fluid being a neutral gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • F27D2027/002—Gas stirring

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

본 발명은 제강공정에서 고청정극저탄소강의 용강을 정련하는 RH 진공탈가스 장치 및 이를 이용한 정련방법에 관한 것으로써, 종래의 RH 진공 탈가스 장치의 하강 환류관에 가스취입노즐을 구비하여 이를 통해 불활성 가스를 취입하므로써, 용제(flux)를 사용하지 않고서도 정련 효율을 높일 수 있을 뿐만 아니라 환류시간을 단축시킬 수 있는 고청정 극저 탄소강의 용량정련용 RH 진공탈가스장치 및 이를 이용한 정련방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a RH vacuum degassing apparatus for refining molten steel of high clean ultra-low carbon steel in a steelmaking process and a refining method using the same, comprising a gas blowing nozzle in a downflow reflux tube of a conventional RH vacuum degassing apparatus. By supplying an inert gas, RH vacuum degassing apparatus for capacity-refining ultra-clean ultra low carbon steel that can improve refining efficiency without using flux and shorten reflux time, and a refining method using the same I would like to, but its purpose is.

본 발명은 상승환류관(11), 진공조(12) 및 하강환류관(13)을 포함하여 구성되는 RH 진공탈가스 장치에 있어서, 상기 하강환류관(13)에 원주방향으로 8-16개의 가스취입노즐(23a)이 형성되고, 그리고 상기 노즐(23a)의 직경이 1-3mm인 고청정 극저탄소강의 용강정련용 RH 진공탈가스 장치 및 이를 이용한 정련방법을 그 요지로 한다.The present invention is a RH vacuum degassing apparatus comprising a rising reflux tube (11), a vacuum tank 12 and a down reflux tube (13), the circumferential direction to the falling reflux tube (13) A gas blowing nozzle 23a is formed, and the nozzle 23a is RH vacuum degassing apparatus for refining molten steel for high-purity ultra-low carbon steel whose diameter is 1-3 mm, and a refining method using the same.

Description

고청정 극저탄소강의 용강정련용 알 에이치(RH) 진공탈가스 장치 및 이를 이용한 정련방법RH vacuum degassing apparatus for molten steel refining of high clean ultra low carbon steel and refining method using the same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 RH 진공탈가스 장치를 개략적으로 나타내는 단면 개략도.1 is a schematic cross-sectional view schematically showing a conventional RH vacuum degassing apparatus.

제3도는 본 발명에 부합되는 RH 진공탈가스 장치를 개략적으로 나타내는 단면 개략도.3 is a schematic cross-sectional view schematically showing an RH vacuum degassing apparatus in accordance with the present invention.

Claims (5)

상승환류관, 진공조 및 하강환류관을 포함하여 구성되는 RH 진공탈가스 장치에 있어서, 상기 하강 환류관에 원주 방향으로 8-16개의 가스취입노즐(23a)이 형성되고, 그리고 상기 노즐(23a)의 직경이 1-3mm인 것을 특징으로 하는 고청정 극저탄소강의 용강정련용 RH 진공탈가스 장치.In the RH vacuum degassing apparatus comprising a rising reflux tube, a vacuum tank, and a down reflux tube, 8-16 gas blowing nozzles 23a are formed in the downward reflux tube in the circumferential direction, and the nozzle 23a. RH vacuum degassing apparatus for molten steel refining of high-clean ultra-low carbon steel, characterized in that the diameter of 1-3). 제1항에 있어서, 상기 가스 취입노즐(23a)이 일정한 간격을 갖고 형성되어 있는 것을 특징으로 하는 고청정 극저탄소강의 용강정련용 RH 진공탈가스 장치.The molten steel refining RH vacuum degassing apparatus according to claim 1, wherein the gas blowing nozzles (23a) are formed at regular intervals. RH 진공탈가스 장치를 사용하여 고청정 극저탄소강의 용강을 정련하는 방법에 있어서, 직경이 1-3mm인 가스취입 노즐 8-16개가 하강 환류관에 원주방향으로 구비되어 있는 RH 탈가스 장치를 사용하여 정련시 상기 가스취입노즐을 통해 불활성가스를 0.5-0.8Kgf/cm2의 공급 압력 및 5-10Nl/min의 공급유량으로 취입하는 것을 특징으로 하는 고청정 극저탄소강의 용강 정련방법.In the method of refining molten steel of highly clean ultra low carbon steel using the RH vacuum degassing apparatus, an RH degassing apparatus is provided in which the circumferential direction of 8-16 gas blowing nozzles having a diameter of 1-3 mm is provided in the downflow reflux tube. When refining by injecting the inert gas at a supply pressure of 0.5-0.8Kgf / cm 2 and a supply flow rate of 5-10Nl / min through the gas blowing nozzles. 제3항에 있어서, 불활성 가스가 상온 또는 150-200℃의 아르곤 가스인 것을 특징으로 하는 고청정 극저탄소강의 용강 정련방법.The molten steel refining method of claim 3, wherein the inert gas is an argon gas at room temperature or 150-200 ° C. 제3항 또는 제4항에 있어서, 상기 가스 취입 노즐이 일정한 간격을 갖고 형성되어 있는 것을 특징으로 하는 고청정 극저탄소강의 용강 정련방법.The molten steel refining method of claim 3 or 4, wherein the gas blowing nozzles are formed at regular intervals.
KR1019950061771A 1995-12-28 1995-12-28 Refining method of r.h vacuum degasing and the same device KR100213326B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950061771A KR100213326B1 (en) 1995-12-28 1995-12-28 Refining method of r.h vacuum degasing and the same device

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Application Number Priority Date Filing Date Title
KR1019950061771A KR100213326B1 (en) 1995-12-28 1995-12-28 Refining method of r.h vacuum degasing and the same device

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KR970043120A true KR970043120A (en) 1997-07-26
KR100213326B1 KR100213326B1 (en) 1999-08-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847777B1 (en) * 2006-12-29 2008-07-23 주식회사 포스코 Method for Refinig Molten Pig Iron in Reinstahl Huten Werke Heraus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100429157B1 (en) * 1999-08-14 2004-04-28 주식회사 포스코 Method for producing ultra clean steel by using measurement of RH agitation force
KR101104799B1 (en) * 2004-09-30 2012-01-12 주식회사 포스코 Refining method of enamel molten steel containing high concentration titanium and nitrogen
KR100723376B1 (en) 2005-12-29 2007-05-30 주식회사 포스코 Vaccum degassing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847777B1 (en) * 2006-12-29 2008-07-23 주식회사 포스코 Method for Refinig Molten Pig Iron in Reinstahl Huten Werke Heraus

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