KR970043127A - Dephosphorization of molten iron - Google Patents

Dephosphorization of molten iron Download PDF

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Publication number
KR970043127A
KR970043127A KR1019950053573A KR19950053573A KR970043127A KR 970043127 A KR970043127 A KR 970043127A KR 1019950053573 A KR1019950053573 A KR 1019950053573A KR 19950053573 A KR19950053573 A KR 19950053573A KR 970043127 A KR970043127 A KR 970043127A
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KR
South Korea
Prior art keywords
dephosphorization
molten iron
fluorspar
quicklime
cao
Prior art date
Application number
KR1019950053573A
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Korean (ko)
Other versions
KR100226925B1 (en
Inventor
박종민
Original Assignee
김종진
포항종합제철 주식회사
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Publication date
Application filed by 김종진, 포항종합제철 주식회사 filed Critical 김종진
Priority to KR1019950053573A priority Critical patent/KR100226925B1/en
Publication of KR970043127A publication Critical patent/KR970043127A/en
Application granted granted Critical
Publication of KR100226925B1 publication Critical patent/KR100226925B1/en

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Classifications

    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for dephosphorising or desulfurising

Abstract

본 발명은 저인강 제조를 위한 용선의 탈인방법에 관한 것으로, 프락스를 구성하는 조성물을 각각 서로 다른 시기에 투입하므로서 탈인능은 물론 망간 실수율을 증가시키는 용선탈인 처리방법을 제공하고자 하는데, 그 목적이 있다. 상기한 목적을 달성하기 위한 본 발명은 저인강제조를 위한 용선예비처리공정의 탈인방법에 있어서, 처리기간중 중량%로, 망간산화물(MnO2): 40-60중량%, 생석회(CaO): 25-45 및 형석(CaF2): 5-15%로 조성되는 분체조성물(M)과 철산화물(Fe2O3): 40-70%, 생석회(CaO): 20-45 및 형석(CaF2); 5-15%로 조성되는 분체조성물(F)을 35%:65%-55%:45%의 중량비 범위가 되도록 순차로 취입하는 것을 포함하여 이루어지는 용선의 탈인처리방법에 관한 것을 그 요지로 한다.The present invention relates to a molten iron dephosphorization method for manufacturing a low-phosphorus steel, and to provide a molten iron dephosphorization treatment method that increases the dephosphorization ability as well as the manganese error rate by adding the composition constituting the proximate at different times, the There is a purpose. The present invention for achieving the above object in the dephosphorization method of the molten iron preliminary treatment process for low phosphorus steel manufacturing, in the weight percent during the treatment period, manganese oxide (MnO 2): 40-60% by weight, quicklime (CaO): 25 -45 and fluorspar (CaF2): 5-15% powder composition (M) and iron oxides (Fe2O3): 40-70%, quicklime (CaO): 20-45 and fluorspar (CaF2); The gist of the present invention relates to a method for dephosphorization of molten iron which includes blowing powder composition (F) composed of 5-15% sequentially in a weight ratio of 35%: 65% -55%: 45%.

Description

용선의 탈인처리 방법Dephosphorization of molten iron

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

제1도는 탈인처리 시간과 용선중 탈인량의 관계를 나타내는 그래프,1 is a graph showing the relationship between the dephosphorization time and the amount of dephosphorization in the molten iron,

제2도는 탈인처리 시간과 용선중 망간증가량의 관계를 나타내는 그래프2 is a graph showing the relationship between dephosphorization time and the amount of manganese increase in molten iron.

Claims (1)

저인강제조를 위한 용선예비처리공정의 탈인방법에 있어서, 처리기간중 중량%로, 망간산화물(MnO2): 40-60중량%, 생석회(CaO): 25-45 및 형석(CaF2): 5-15%로 조성되는 분체조성물(M)과 철산화물(Fe2O3): 40-70%, 생석회(CaO): 20-45 및 형석(CaF2); 5-15%로 조성되는 분체조성물(F)을 35%:65%-55%:45%의 중량비 범위가 되도록 순차로 취입하는 것을 포함하여 이루어지는 용선의 탈인처리방법In the dephosphorization method of the molten iron preliminary treatment process for low phosphorus steel manufacturing, in weight% during the treatment period, manganese oxide (MnO 2 ): 40-60% by weight, quicklime (CaO): 25-45 and fluorspar (CaF 2 ): Powder composition (M) and iron oxide (Fe 2 O 3 ): 5 to 15% composition: 40-70%, quicklime (CaO): 20-45 and fluorspar (CaF 2 ); Dephosphorization treatment method of molten iron | metal which includes blowing powder composition (F) which consists of 5-15% sequentially in the weight ratio range of 35%: 65%-55%: 45%.
KR1019950053573A 1995-12-21 1995-12-21 Dephosphorous method of molten metal KR100226925B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950053573A KR100226925B1 (en) 1995-12-21 1995-12-21 Dephosphorous method of molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950053573A KR100226925B1 (en) 1995-12-21 1995-12-21 Dephosphorous method of molten metal

Publications (2)

Publication Number Publication Date
KR970043127A true KR970043127A (en) 1997-07-26
KR100226925B1 KR100226925B1 (en) 1999-10-15

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Application Number Title Priority Date Filing Date
KR1019950053573A KR100226925B1 (en) 1995-12-21 1995-12-21 Dephosphorous method of molten metal

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100885117B1 (en) * 2002-11-14 2009-02-20 주식회사 포스코 A method for manufacturing of low carbon steel having high cleaness and low phosphorous
KR102528644B1 (en) 2022-04-29 2023-05-04 주식회사 동진 Fire extinguishing water spray nozzle clamping structure for building fire extinguishing

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Publication number Publication date
KR100226925B1 (en) 1999-10-15

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