KR950016969A - How to prevent nozzle clogging during continuous casting of low silicon steel - Google Patents

How to prevent nozzle clogging during continuous casting of low silicon steel Download PDF

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Publication number
KR950016969A
KR950016969A KR1019930031106A KR930031106A KR950016969A KR 950016969 A KR950016969 A KR 950016969A KR 1019930031106 A KR1019930031106 A KR 1019930031106A KR 930031106 A KR930031106 A KR 930031106A KR 950016969 A KR950016969 A KR 950016969A
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South Korea
Prior art keywords
continuous casting
less
nozzle clogging
low
molten steel
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Application number
KR1019930031106A
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Korean (ko)
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KR960000324B1 (en
Inventor
최인섭
박병곤
민중기
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조말수
포항종합제철 주식회사
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Priority to KR1019930031106A priority Critical patent/KR960000324B1/en
Publication of KR950016969A publication Critical patent/KR950016969A/en
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Publication of KR960000324B1 publication Critical patent/KR960000324B1/en

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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

본발명은 Si이 낮고, AI이 첨가되지 않은 저급의 무방향성 전기강판 제조시전로－RH 탈가스 처리로 제조한 용강을 연속주조할 시 발생되는 노즐 막힘을 방지하는 방법에 관한 것으로써, 저 Si강 특히 Mn/Si 비 @ 0.5이고, Si/AI 비가 낮은 강을 제조할 때 노즐 막힘을 방지하여 안정적인 주조성을 확보하고자 하는데, 그 목적이 있다.The present invention relates to a method for preventing nozzle clogging caused by continuous casting of molten steel manufactured by RH degassing treatment in a low-oriented non-oriented electrical steel sheet manufacturing system having low Si and no AI. The purpose of this invention is to ensure stable castability by preventing nozzle clogging when producing steel, in particular Mn / Si ratio @ 0.5 and low Si / AI ratio.

본 발명은 전로정련된 용강을 래들로 출강한 후, 버블링 및 탈가스 처리한 다음, 연속주조하여 C : 100ppm이하, Si : 0.5%이하, Mn : 0.15∼0.25%, P : 0.05∼0.07%, 전(Total) AI : 50ppm이하, 잔부 Fe 및 기타불가피한 불순물로 조성되는 저규소강을 제조함에 있어서, 래들 슬래그의 산화도(T.Fe+MnO+P2O5)가 16.0% 이하가 되도록 하고; 그리고 탈가스 처리시 탈산제로서 Fe－Si과 함께 AI을 0.015∼0.03㎏/톤－용강을 투입하여 연속주조시 노즐막힘을 방지하는 방법을 그 요지로 한다.In the present invention, the molten steel is converted to ladle, bubbling and degassing, followed by continuous casting, C: 100 ppm or less, Si: 0.5% or less, Mn: 0.15 to 0.25%, P: 0.05 to 0.07% , Total AI: 50ppm or less, in the manufacture of low silicon steel composed of the balance Fe and other unavoidable impurities, so that the oxidation degree (T.Fe + MnO + P 2 O 5 ) of the ladle slag is 16.0% or less and; As a main point, a method of preventing nozzle clogging during continuous casting by adding 0.015 to 0.03 kg / ton of molten steel with Fe-Si as a deoxidizer during degassing treatment is introduced.

Description

저규소강의 연속주조시 노즐막힘 방지방법How to prevent nozzle clogging during continuous casting of low silicon steel

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

제1도: 종래의 방법에 따라 연속 주조시 노즐에 부착한 개재물의 SEM 분석 결과사진,Figure 1: SEM analysis of inclusions attached to the nozzle during continuous casting according to the conventional method,

제2도: 슬래그 산화도와 AI 투입량이 노즐 막힘에 미치는 영향을 나타내는 그래프.Figure 2: Graph showing the effect of slag oxidation and AI input on nozzle clogging.

Claims (1)

전로정련된 용강을 래들로 출강한 후, 버블링 및 탈가스 처리한 다음, 연속주조하여 C : 100ppm이하, Si : 0.5%이하, Mn : 0.15∼0.25%, P : 0.05∼0.07%, 전(Total) AI : 50ppm이하, 잔부 Fe 및 기타불가피한 불순물로 조성되는 저규소강을 제조함에 있어서, 래들 슬래그의 산화도(T.Fe+MnO+P2O5)가 16.0% 이하가 되도록 하고; 그리고 탈가스 처리시 탈산제로서 Fe－Si과 함께 AI을 0.015∼0.03㎏/톤－용강을 투입하여 연속주조시 노즐막힘을 방지 하는 것을 특징으로 하는 저규소강의 연속주조시 노즐막힘 방지방법.After refining the molten steel, it is bubbling and degassing, followed by continuous casting, C: 100 ppm or less, Si: 0.5% or less, Mn: 0.15 to 0.25%, P: 0.05 to 0.07%, Total) AI: 50ppm or less, in the production of low silicon steel composed of the remaining Fe and other unavoidable impurities, the degree of oxidation (T.Fe + MnO + P 2 O 5 ) of the ladle slag is 16.0% or less; And 0.015 to 0.03 kg / ton of molten steel with Fe-Si as a deoxidizer during degassing to prevent nozzle clogging during continuous casting. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930031106A 1993-12-29 1993-12-29 Method of preventing nozzle stop KR960000324B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930031106A KR960000324B1 (en) 1993-12-29 1993-12-29 Method of preventing nozzle stop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930031106A KR960000324B1 (en) 1993-12-29 1993-12-29 Method of preventing nozzle stop

Publications (2)

Publication Number Publication Date
KR950016969A true KR950016969A (en) 1995-07-20
KR960000324B1 KR960000324B1 (en) 1996-01-05

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Application Number Title Priority Date Filing Date
KR1019930031106A KR960000324B1 (en) 1993-12-29 1993-12-29 Method of preventing nozzle stop

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Publication number Publication date
KR960000324B1 (en) 1996-01-05

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