KR970043125A - Slag deoxidation method of ultra low carbon molten steel - Google Patents

Slag deoxidation method of ultra low carbon molten steel Download PDF

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Publication number
KR970043125A
KR970043125A KR1019950046830A KR19950046830A KR970043125A KR 970043125 A KR970043125 A KR 970043125A KR 1019950046830 A KR1019950046830 A KR 1019950046830A KR 19950046830 A KR19950046830 A KR 19950046830A KR 970043125 A KR970043125 A KR 970043125A
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KR
South Korea
Prior art keywords
molten steel
low carbon
ultra
deoxidation method
carbon molten
Prior art date
Application number
KR1019950046830A
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Korean (ko)
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KR100226920B1 (en
Inventor
김봉조
박종민
김웅래
신기철
Original Assignee
김종진
포항종합제철 주식회사
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Priority to KR1019950046830A priority Critical patent/KR100226920B1/en
Publication of KR970043125A publication Critical patent/KR970043125A/en
Application granted granted Critical
Publication of KR100226920B1 publication Critical patent/KR100226920B1/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
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
    • 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

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

Abstract

본 발명은 극저탄소용강의 슬래그 탈산방법에 관한 것이며, 그 목적은 종래의 탈산방법과는 달리 분진을 발생시키지 않으면서도 탈산효율이 우수한 새로운 탈산방법을 제고암에 있다. 상기 목적달성을 위한 본 발명은 전로 조업을 통해 1차 정련되어 레이들에 출강된 0.002-0.04%의 탄소가 함유된 극저탄소용강을 진공탈가스 설비의 진공조를 이용하여 2차 정련하는 제강공정에 있어서, 상기 극저탄소 용강중의 용존산소를 탈산한 직후 상기 진공조의 내부에 CaC2가 30중량% 이상 함유되고 그 입자크기가 3-30mm인 탈산제를 투입하는 극저탄소용강의 슬래그 탈산방법에 관한 것을 그 기술적 요지로 한다.The present invention relates to a slag deoxidation method of ultra-low carbon molten steel, and its object is to provide a new deoxidation method with excellent deoxidation efficiency without generating dust unlike the conventional deoxidation method. The present invention for achieving the above object is a steelmaking process for the second refining of ultra-low carbon molten steel containing 0.002-0.04% of carbon left in the ladle by the primary refining through the converter operation A method for slag deoxidation of ultra low carbon molten steel, wherein a deoxidizing agent containing 30% by weight or more of CaC2 and having a particle size of 3-30 mm is introduced into the vacuum chamber immediately after deoxidation of dissolved oxygen in the ultra low carbon molten steel. It is a technical point.

Description

극저탄소용강의 슬래그 탈산방법Slag deoxidation method of ultra low carbon molten steel

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

제1도는 일반적인 제강공정을 나타내는 개략도,1 is a schematic diagram showing a general steelmaking process,

제3도는 종래의 탈산제 투입방법을 설명하기 위한 모식도,3 is a schematic diagram for explaining a conventional deoxidizer input method,

제7도는 본 발명에 의해 진공탈개스의 진공조내에서 탈산제를 투입하는 방법을 나타내는 모식도7 is a schematic view showing a method of adding a deoxidizer in a vacuum tank of a vacuum degassing according to the present invention.

Claims (3)

전로 조업을 통해 1차 정련되어 레이들에 출강된 0.002-0.04%의 탄소가 함유된 극저탄소용강을 진공탈가스 설비의 진공조를 이용하여 2차 정련하는 제강공정에 있어서, 상기 극저탄소 용강중의 용존산소를 탈산한 직후 상기 진공조의 내부에 CaC2가 30중량% 이상 함유되고 그 입자크기가 3-30mm인 탈산제를 투입함을 특징으로 하는 극저탄소 용강이 슬래그 탈산방법In the steelmaking process of secondary refining of ultra-low carbon molten steel containing 0.002-0.04% of carbon which is first refined through converter operation and discharged to ladle using a vacuum tank of a vacuum degassing facility. Very low carbon molten steel slag deoxidation method characterized by injecting a deoxidizer having 30% by weight or more of CaC 2 and a particle size of 3-30mm in the inside of the vacuum chamber immediately after deoxidizing dissolved oxygen. 제1항에 있어서, 상기 탈산제 투입전 탈산된 극즈탄소용강의 용존산소량이 200ppm 이하임을 특징으로 하는 극저탄소강의 슬래그 탈산방법The slag deoxidation method of ultra low carbon steel according to claim 1, wherein the dissolved oxygen content of the deoxidized extreme carbon steel is 200 ppm or less. 제1항 또는 제2항에 있어서, 상기 탈산제의 투입량이 용강톤당 30-100kg 임을 특징으로 하는 극저탄소용강의 슬래그 탈산방법The slag deoxidation method according to claim 1 or 2, wherein the input amount of the deoxidizer is 30-100 kg per ton of molten steel.
KR1019950046830A 1995-12-05 1995-12-05 Slag deoxidation method of low carbon steel KR100226920B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950046830A KR100226920B1 (en) 1995-12-05 1995-12-05 Slag deoxidation method of low carbon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950046830A KR100226920B1 (en) 1995-12-05 1995-12-05 Slag deoxidation method of low carbon steel

Publications (2)

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KR970043125A true KR970043125A (en) 1997-07-26
KR100226920B1 KR100226920B1 (en) 1999-10-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020000605A (en) * 2000-06-26 2002-01-05 이구택 A method for reducing visible dust during pouring dephosphorized melts into ladle
KR100913008B1 (en) * 2002-12-23 2009-08-20 주식회사 포스코 Molten steel refining method of ruhrstahl hausen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100419656B1 (en) * 1999-12-06 2004-02-25 주식회사 포스코 Method for refining extra low carbon steel by double deoxidizing slag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020000605A (en) * 2000-06-26 2002-01-05 이구택 A method for reducing visible dust during pouring dephosphorized melts into ladle
KR100913008B1 (en) * 2002-12-23 2009-08-20 주식회사 포스코 Molten steel refining method of ruhrstahl hausen

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Publication number Publication date
KR100226920B1 (en) 1999-10-15

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