KR950018515A - Manufacturing method of slab of low carbon aluminum deoxidized steel for deep plating tin plate manufacturing - Google Patents

Manufacturing method of slab of low carbon aluminum deoxidized steel for deep plating tin plate manufacturing Download PDF

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Publication number
KR950018515A
KR950018515A KR1019930031116A KR930031116A KR950018515A KR 950018515 A KR950018515 A KR 950018515A KR 1019930031116 A KR1019930031116 A KR 1019930031116A KR 930031116 A KR930031116 A KR 930031116A KR 950018515 A KR950018515 A KR 950018515A
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South Korea
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tons
manufacturing
molten steel
slab
bubbling
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KR1019930031116A
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Korean (ko)
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KR950012412B1 (en
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김종주
윤상필
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조말수
포항종합제철 주식회사
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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
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • B22D11/108—Feeding additives, powders, or the like
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • 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
    • C21C2300/00—Process aspects
    • C21C2300/02—Foam creation
    • 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)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

본 발명은 2-피이스 캔등의 제조용으로 사용되는 심가공용 주석도금원판 소재를 제조하기 위한 저탄소 알루미늄 탈산강의 슬라브를 제조하는 방법에 관한 것으로써, 본 발명은 전로 출강시 유출 슬래그의 최소화 및 유출된 슬래그에 CaO및 프럭스를 투입하고 버블링장에서 강버블링을 실시하여 개재물포집능이 우수한 최적 슬래그조성을 만들어 용강중의 개재물을 최대로 제거한 후 다시 RH반응조내에 적절한 프럭스를 투입하여 환류시킴으로써, RH전에 미제거된 개재물을 다시 제거시키고, 연속주조시 개재물 혼입을 최대로 억제시켜 주조함으로써, 청정성이 우수한 심가공용 주석도금 원판제조용 저탄소 알루미늄 탈산강의 슬라브를 제조하고자 하는데, 그 목적이 있다.The present invention relates to a method for manufacturing a slab of low carbon aluminum deoxidized steel for manufacturing a tin-plated disc material for deep processing used for the manufacture of 2-piece cans, etc. CaO and flux are added to the slag and strong bubbling is carried out in the bubbling field to create the optimum slag composition with excellent inclusion capturing ability. By removing the removed inclusions again and casting to suppress the inclusions to the maximum during continuous casting, to produce a slab of low-carbon aluminum deoxidized steel for manufacturing deep-plated tin-plated master plate excellent in cleanliness.

본 발명은 전로정련공정, 출강공정, 버블링공정, 진공탈가스처리공정 및 연속 주조공정을 차례로 거쳐 심가공용 주석도금원판제조용 저탄소 알루미늄 탈산강의 슬라브를 제조하는 방법에 있어서, 상기 전로 정련시 종점탄소:0.030~0.050%, 종점산소:700ppm이하로 조정하고; 상기 출강시 CaO:1.8~2.1톤/260톤-용강 및 합성슬래그:300-500kg/260톤-용강을 투입하고, 슬래그 유출 최소화를 위하여 체크볼, 스토퍼, 용강커팅, 및 플러그를 동시에 사용하고; 상기 버블링시 버블링유량;0.6~0.8N㎡/Min, 및 버블링시간:5분이상으로 조정하고; 상기 탈가스 처리시 합성슬래그 150~250kg/260톤-용강 투입후 진공하에서 15분 이상 환류시키고; 슬래그중(FeO+MnO)를 1.5% 이하로 유지하고; 그리고 상기 연속주조시 하광형 노즐을 적용하고; 래들잔탕을 8톤/260톤-용강이상, 턴디쉬 용강량을 50톤/260톤-용강이상 확보하는 것을 특징으로 하는 심가공용 주석도금원판 제조용 저탄소 알루미늄 탈산강의 슬라브 제조방법을 그 요지로 한다.The present invention is a method of manufacturing a slab of low-carbon aluminum deoxidized steel for deep-plated tin plating disc manufacturing process through the converter refining process, tapping process, bubbling process, vacuum degassing process and continuous casting process, the end carbon : 0.030 ~ 0.050%, End point oxygen: adjusted to 700 ppm or less; CaO: 1.8 ~ 2.1 tons / 260 tons-molten steel and synthetic slag: 300-500 kg / 260 tons-molten steel during the tapping, and using a check ball, a stopper, molten steel cutting, and a plug at the same time to minimize the outflow of slag; Bubbling flow rate during bubbling; 0.6 to 0.8 Nm 2 / Min, and bubbling time: to 5 minutes or more; During the degassing treatment, the synthetic slag was refluxed for 15 minutes or more under vacuum after injection of 150 to 250 kg / 260 tons of molten steel; (FeO + MnO) in slag is kept below 1.5%; And applying a downlight nozzle during the continuous casting; The main point of the slab is a method for producing slab of low carbon aluminum deoxidized steel for the manufacture of deep-plated tin plated disc, characterized in that the ladle residue is secured to 8 ton / 260 tons of molten steel and more than 50 tons / 260 tons of molten steel.

Description

심가공용 주석도금원판제조용 저탄소 알루미늄 탈산강의 슬라브 제조방법Manufacturing method of slab of low carbon aluminum deoxidized steel for deep plating tin plate manufacturing

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

제1도: 슬래그 중의(FeO+MnO) 함량과 전(tatal) 산소량과의 관계도이다.FIG. 1: Relation between the content of (FeO + MnO) in the slag and the amount of total oxygen.

제2도: 슬래그 중의 (FeO+MnO) 함량과 sol.Al 손실과의 관계도이다.FIG. 2: Relationship between (FeO + MnO) content in slag and sol.Al loss.

제3도: 종래방법과 본 발명법에 의해 제조된 슬라브중의 전(total) 산소량을 나타내는 막대그래프이다.3 is a bar graph showing the total amount of oxygen in the slab manufactured by the conventional method and the present invention method.

제4도: 종래방법과 본 발명법에 의해 제조된 슬라브의 청정도를 나타내는 막대그래프이다.4 is a bar graph showing the cleanliness of the slab manufactured by the conventional method and the present invention method.

Claims (1)

전로정련공정, 출강공정, 버블링공정, 진공탈가스처리공정 및 연속 주조공정을 차례로 거쳐 심가공용 주석도금원판제조용 저탄소 알루미늄 탈산강의 슬라브를 제조하는 방법에 있어서, 상기 전로 정련시 종점탄소:0.030~0.050%, 종점산소:700ppm이하로 조정하고; 상기 출강시 CaO:1.8~2.1톤/260톤-용강 및 합성슬래그:300-500kg/260톤-용강을 투입하고, 슬래그 유출 최소화를 위하여 체크볼, 스토퍼, 용강커팅, 및 플러그를 동시에 사용하고; 상기 버블링시 버블링유량;0.6~0.8N㎡/Min, 및 버블링시간:5분이상으로 조정하고; 상기 탈가스 처리시 합성슬래그 150~250kg/260톤-용강 투입후 진공하에서 15분 이상 환류시키고; 슬래그중(FeO+MnO)를 1.5% 이하로 유지하고; 그리고 상기 연속주조시 하광형 노즐을 적용하고; 래들잔탕을 8톤/260톤-용강이상, 턴디쉬 용강량을 50톤/260톤-용강이상 확보하는 것을 특징으로 하는 심가공용 주석도금원판 제조용 저탄소 알루미늄 탈산강의 슬라브 제조방법.In the method for manufacturing slab of low carbon aluminum deoxidized steel for deep-plating tin plate disc manufacturing process through the converter refining process, tapping process, bubbling process, vacuum degassing process and continuous casting process, the end carbon in the converter refining: 0.030 ~ 0.050%, end point oxygen: adjusted to 700 ppm or less; CaO: 1.8 ~ 2.1 tons / 260 tons-molten steel and synthetic slag: 300-500 kg / 260 tons-molten steel during the tapping, and using a check ball, a stopper, molten steel cutting, and a plug at the same time to minimize the outflow of slag; Bubbling flow rate during bubbling; 0.6 to 0.8 Nm 2 / Min, and bubbling time: to 5 minutes or more; During the degassing treatment, the synthetic slag was refluxed for 15 minutes or more under vacuum after injection of 150 to 250 kg / 260 tons of molten steel; (FeO + MnO) in slag is kept below 1.5%; And applying a downlight nozzle during the continuous casting; A slab manufacturing method for slab of low carbon aluminum deoxidized steel for manufacturing tin-plated disc for deep processing, characterized by securing ladle residues of 8 ton / 260 tons of molten steel and 50 ton / 260 tons of molten steel of tundish. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930031116A 1993-12-30 1993-12-30 Making method of low carbon aluminium deoxidation steel KR950012412B1 (en)

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KR950012412B1 KR950012412B1 (en) 1995-10-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100979023B1 (en) * 2003-10-17 2010-08-30 주식회사 포스코 Method for Continuous-Continuous-Casting Molten Steel
KR101030552B1 (en) * 2003-12-20 2011-04-21 주식회사 포스코 Method for refining molten steel of low core loss and isotropic electromagnetic steel sheet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100979023B1 (en) * 2003-10-17 2010-08-30 주식회사 포스코 Method for Continuous-Continuous-Casting Molten Steel
KR101030552B1 (en) * 2003-12-20 2011-04-21 주식회사 포스코 Method for refining molten steel of low core loss and isotropic electromagnetic steel sheet

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KR950012412B1 (en) 1995-10-17

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