KR900018387A - Manufacturing method of high clean steel - Google Patents

Manufacturing method of high clean steel Download PDF

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Publication number
KR900018387A
KR900018387A KR1019890006752A KR890006752A KR900018387A KR 900018387 A KR900018387 A KR 900018387A KR 1019890006752 A KR1019890006752 A KR 1019890006752A KR 890006752 A KR890006752 A KR 890006752A KR 900018387 A KR900018387 A KR 900018387A
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KR
South Korea
Prior art keywords
minutes
bar
flow rate
pressure
clean steel
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KR1019890006752A
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Korean (ko)
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KR910006640B1 (en
Inventor
김종주
김정식
이승관
김윤걸
Original Assignee
정명식
포항종합제철 주식회사
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Priority to KR1019890006752A priority Critical patent/KR910006640B1/en
Publication of KR900018387A publication Critical patent/KR900018387A/en
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Publication of KR910006640B1 publication Critical patent/KR910006640B1/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
    • C21C7/04—Removing impurities by adding a treating agent

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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

내용 없음No content

Description

고청정강 제조방법Manufacturing method of high clean steel

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

제1도는 본 발명을 구현하기위한 장치의 개략도, 제2도는 개재물크기와 부상분리와의 관계도.1 is a schematic diagram of an apparatus for implementing the present invention, Figure 2 is a relationship between inclusion size and floating separation.

Claims (2)

다음과 같은 공정 즉, 알루미늄 탈산된 용강을 4-8 bar의 압력하에서 0.4-0.8Nm3/분의 유량으로 1-2분동안 아르곤 저취교반직후 산소농담전지등을 이용하여 기전력을 측정한후 용강중 용해 알루미늄을 예측하여 합금 철 또는 알루미늄을 투입하는 공정 ; 다음에, 1-1.2㎏/T.S의 생석회계 분말 플럭스를 4-8bar의 압력 및 0.4-0.8Nm3/분의 유량의 아르곤가스와 함께 4-5분동안 취입하는 공정 ; 다음에, 4-5bar의 압력하에서 0.4-0.5Nm3/분의 유량으로 아르곤가스를 4-5분동안 저취아르곤가스교반을 실시하는 공정; 다음에, 용강을 연속 주조하는 공정을 포함하는 것을 특징으로하는 고청정강제조방법.In the following process, the aluminum deoxidized molten steel was measured at a flow rate of 0.4-0.8 Nm 3 / min under a pressure of 4-8 bar for 1-2 minutes after argon low stirring, and then the electromotive force was measured using an oxygen concentration battery. Injecting ferroalloy or aluminum in anticipation of molten aluminum; Next, the step of blowing the quicklime powder flux of 1-1.2 kg / TS with argon gas at a pressure of 4-8 bar and a flow rate of 0.4-0.8 Nm 3 / min for 4-5 minutes; Then argon gas is stirred for 4-5 minutes at low flow rate of 0.4-0.5 Nm 3 / min under a pressure of 4-5 bar; Next, the high-clean steel manufacturing method characterized by including the process of continuously casting molten steel. 제1항에 있어서, 상기 생석회계 분말플럭스가 WT%로 Ca0 : 63.2-79.5%, CaF2 : 11.3-26.8%, SiO2 : 3.9-4.8% 및 기타 : 5.2-5.3%로 조성되는 것을 특징으로 하는 고청정강제조방법.The method according to claim 1, wherein the quicklime powder flux is WT% Ca0: 63.2-79.5%, CaF2: 11.3-26.8%, SiO2: 3.9-4.8% and other: 5.2-5.3% Clean steel manufacturing method. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890006752A 1989-05-19 1989-05-19 Making process for high pure steel KR910006640B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890006752A KR910006640B1 (en) 1989-05-19 1989-05-19 Making process for high pure steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890006752A KR910006640B1 (en) 1989-05-19 1989-05-19 Making process for high pure steel

Publications (2)

Publication Number Publication Date
KR900018387A true KR900018387A (en) 1990-12-21
KR910006640B1 KR910006640B1 (en) 1991-08-29

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KR1019890006752A KR910006640B1 (en) 1989-05-19 1989-05-19 Making process for high pure steel

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Cited By (2)

* 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
KR20160073681A (en) * 2014-12-17 2016-06-27 주식회사 포스코 Refining method for steel

Cited By (2)

* 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
KR20160073681A (en) * 2014-12-17 2016-06-27 주식회사 포스코 Refining method for steel

Also Published As

Publication number Publication date
KR910006640B1 (en) 1991-08-29

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