KR960023113A - Manufacturing method of low phosphorus (P) steel with high silicon (Si) molten iron - Google Patents

Manufacturing method of low phosphorus (P) steel with high silicon (Si) molten iron Download PDF

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Publication number
KR960023113A
KR960023113A KR1019940040068A KR19940040068A KR960023113A KR 960023113 A KR960023113 A KR 960023113A KR 1019940040068 A KR1019940040068 A KR 1019940040068A KR 19940040068 A KR19940040068 A KR 19940040068A KR 960023113 A KR960023113 A KR 960023113A
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KR
South Korea
Prior art keywords
molten iron
steel
minutes
high silicon
low phosphorus
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KR1019940040068A
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Korean (ko)
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KR970005383B1 (en
Inventor
김동렬
이연규
Original Assignee
김만제
포항종합제철 주식회사
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Priority to KR1019940040068A priority Critical patent/KR970005383B1/en
Publication of KR960023113A publication Critical patent/KR960023113A/en
Application granted granted Critical
Publication of KR970005383B1 publication Critical patent/KR970005383B1/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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

본 발명은 고로조업에서 노상황이 좋지 않아 고 실리콘[Si]용선출선시 제강에서 조업의 영향을 받지 않고 저 인[P]강을 제조하는 방법에 관한 것으로써, 고 Si용선을 1, 2차 취련단계로 나누어 각 취련단계에서 적정량의 부원료와 소결광을 투입하여 취련하므로서, 고 Si함유용선으로 저 P강을 안정적으로 제조하고자 하는데, 그 목적이 있다.The present invention relates to a method for producing low phosphorus [P] steel without being affected by the operation in steelmaking when the high silicon [Si] molten iron is elected in the blast furnace operation. It is intended to stably manufacture low P steel with high Si-containing molten iron by injecting by adding an appropriate amount of sub-materials and sintered ore in each blowing step by dividing into the blowing step.

본 발명은 0.7~2.0% Si함유용선을 용선비 65~85%로 전로에 장입하고 염기도가 2.0~3.0이 되도록 CaO계부원료를 투입하고, 그리고 소결광의 최종투입이 취련끝나기전 0.5~1.5분내에 완료되도록 소결광을 10~30kg/용선-톤 투입하여 5~6분동안 1차 취련하는 단계; 상기 1차 취련 후 슬래그를 30% 이상 배출하는 단계; 및 염기도가 3.5~5.0이 되도록 CaO를 투입하고, 그리고 10~40kg/용선-톤의 소결광을 투입하여 종접[P]가 0.008~0.013%가 되도록 10~14분동안 2차 취련하는 단계를 포함하여 구성되는 고 실리콘 용선으로 저 인[P]강의 제조방법을 그 요지로 한다.In the present invention, 0.7-2.0% Si-containing molten iron is charged into the converter at a molten iron ratio of 65-85%, and a CaO-based raw material is added to the basicity of 2.0-3.0, and 0.5-1.5 minutes before the final input of the sintered ore is finished. Injecting the sintered ore 10-30kg / molten-ton to complete the first blow for 5-6 minutes; Discharging slag 30% or more after the first blowing; And adding CaO so as to have a basicity of 3.5 to 5.0, and sintering ore of 10 to 40 kg / molten-ton, followed by secondary drilling for 10 to 14 minutes so that the vertical [P] becomes 0.008 to 0.013%. The manufacturing method of low phosphorus [P] steel with the high silicon molten iron comprised is made into the summary.

Description

고 실리콘(Si)용선으로 저 인(P)강의 제조방법Manufacturing method of low phosphorus (P) steel with high silicon (Si) molten iron

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

Claims (1)

0.7~2.0% Si함유용선을 용선비 65~85%로 전로에 장입하고 염기도가 2.0~3.0이 되도록 CaO계 부원료를 투입하고, 그리고 소결광의 최종투입이 취련끝나기전 0.5~1.5분내에 완료되도록 소결광을 10~30kg/용선-톤 투입하여 5~6분동안 1차 취련하는 단계; 상기 1차 취련 후 슬래그를 30% 이상 배출하는 단계; 및 염기도가 3.5~5.0이 되도록 CaO를 투입하고, 그리고 10~40kg/용선-톤의 소결광을 투입하여 종접[P]가 0.008~0.013%가 되도록 10~14분동안 2차 취련하는 단계를 포함하여 구성되는 고 실리콘 용선으로 저 인[P]강의 제조방법.Charge 0.7 ~ 2.0% Si-containing molten iron into the converter with a molten iron ratio of 65 ~ 85%, add CaO-based raw materials so that the basicity is 2.0 ~ 3.0, and sinter ore to complete the final input within 0.5 ~ 1.5 minutes before finishing To 10 to 30kg / molten iron-ton was first blown for 5-6 minutes; Discharging slag 30% or more after the first blowing; And adding CaO so as to have a basicity of 3.5 to 5.0, and sintering ore of 10 to 40 kg / molten-ton, followed by secondary drilling for 10 to 14 minutes so that the vertical [P] becomes 0.008 to 0.013%. Method for producing low phosphorus [P] steel with high silicon molten iron. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040068A 1994-12-30 1994-12-30 Making method of low phosphorous steel KR970005383B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940040068A KR970005383B1 (en) 1994-12-30 1994-12-30 Making method of low phosphorous steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940040068A KR970005383B1 (en) 1994-12-30 1994-12-30 Making method of low phosphorous steel

Publications (2)

Publication Number Publication Date
KR960023113A true KR960023113A (en) 1996-07-18
KR970005383B1 KR970005383B1 (en) 1997-04-15

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Application Number Title Priority Date Filing Date
KR1019940040068A KR970005383B1 (en) 1994-12-30 1994-12-30 Making method of low phosphorous steel

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101010800B1 (en) * 2003-07-07 2011-01-25 주식회사 포스코 Refining method for reducing silicon in a ladle furnace process of electric furnace

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100832527B1 (en) * 2006-12-28 2008-05-26 주식회사 포스코 Method for refining molten steel in converter
KR101257740B1 (en) * 2011-04-28 2013-04-23 현대제철 주식회사 Refining method for hot metal containing high-silicon concentration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101010800B1 (en) * 2003-07-07 2011-01-25 주식회사 포스코 Refining method for reducing silicon in a ladle furnace process of electric furnace

Also Published As

Publication number Publication date
KR970005383B1 (en) 1997-04-15

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