EP4328330A4 - Method for refining molten iron - Google Patents

Method for refining molten iron Download PDF

Info

Publication number
EP4328330A4
EP4328330A4 EP22811072.2A EP22811072A EP4328330A4 EP 4328330 A4 EP4328330 A4 EP 4328330A4 EP 22811072 A EP22811072 A EP 22811072A EP 4328330 A4 EP4328330 A4 EP 4328330A4
Authority
EP
European Patent Office
Prior art keywords
liquid iron
refining liquid
refining
iron
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22811072.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4328330A1 (en
Inventor
Futoshi Ogasawara
Ryo Kawabata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP4328330A1 publication Critical patent/EP4328330A1/en
Publication of EP4328330A4 publication Critical patent/EP4328330A4/en
Pending legal-status Critical Current

Links

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
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
    • 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
    • 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
    • C21C5/35—Blowing from above and through the bath
    • 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
    • C21C7/068—Decarburising
    • 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
    • C21C7/072—Treatment with gases
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (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)
EP22811072.2A 2021-05-26 2022-04-19 Method for refining molten iron Pending EP4328330A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021088031 2021-05-26
PCT/JP2022/018168 WO2022249798A1 (ja) 2021-05-26 2022-04-19 溶鉄の精錬方法

Publications (2)

Publication Number Publication Date
EP4328330A1 EP4328330A1 (en) 2024-02-28
EP4328330A4 true EP4328330A4 (en) 2024-10-30

Family

ID=84229902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22811072.2A Pending EP4328330A4 (en) 2021-05-26 2022-04-19 Method for refining molten iron

Country Status (8)

Country Link
US (1) US20240271233A1 (enrdf_load_stackoverflow)
EP (1) EP4328330A4 (enrdf_load_stackoverflow)
JP (1) JP7384294B2 (enrdf_load_stackoverflow)
KR (1) KR20230162108A (enrdf_load_stackoverflow)
CN (1) CN117377781A (enrdf_load_stackoverflow)
BR (1) BR112023024464A2 (enrdf_load_stackoverflow)
TW (1) TWI817507B (enrdf_load_stackoverflow)
WO (1) WO2022249798A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102840642B1 (ko) * 2023-10-04 2025-07-31 현대제철 주식회사 냉연강판 및 그 제조방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754894A (en) * 1972-04-20 1973-08-28 Joslyn Mfg & Supply Co Nitrogen control in argon oxygen refining of molten metal
GB1331564A (en) * 1970-02-18 1973-09-26 Maximilianshuette Eisenwerk Process for making chromium steels
JP3309395B2 (ja) * 1990-12-25 2002-07-29 住友金属工業株式会社 転炉精錬方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147509A (ja) * 1982-02-26 1983-09-02 Kawasaki Steel Corp ステンレス鋼の溶製方法
JPS5925916A (ja) * 1982-08-02 1984-02-10 Kawasaki Steel Corp 含クロム合金銑の精錬方法
JPS60194009A (ja) * 1984-03-14 1985-10-02 Kawasaki Steel Corp ステンレス鋼の溶製方法
JPS61223117A (ja) * 1985-03-29 1986-10-03 Kawasaki Steel Corp 溶融スラグ内金属酸化物の還元回収方法
JP2754983B2 (ja) * 1991-09-26 1998-05-20 住友金属工業株式会社 転炉精錬方法
JP3496529B2 (ja) 1998-07-29 2004-02-16 住友金属工業株式会社 Ｒｈ真空精錬方法
JP3922181B2 (ja) 2002-12-27 2007-05-30 Ｊｆｅスチール株式会社 高清浄鋼の溶製方法
JP5092245B2 (ja) 2006-02-09 2012-12-05 Ｊｆｅスチール株式会社 溶鋼の脱窒方法
JP5428447B2 (ja) * 2008-03-31 2014-02-26 Ｊｆｅスチール株式会社 Ｒｈ真空脱ガス装置における溶鋼の精錬方法
JP5526565B2 (ja) * 2009-03-09 2014-06-18 Ｊｆｅスチール株式会社 転炉製鋼法
JP5589688B2 (ja) * 2009-09-10 2014-09-17 Ｊｆｅスチール株式会社 溶銑の製造方法
JP5910579B2 (ja) * 2013-08-01 2016-04-27 Ｊｆｅスチール株式会社 極低窒素純鉄の溶製方法
CN109852766B (zh) * 2018-12-05 2020-11-03 敬业钢铁有限公司 一种rh炉精炼氢氧控制工艺
CN111270036A (zh) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 一种氢能直接还原生产海绵铁的系统和工艺方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1331564A (en) * 1970-02-18 1973-09-26 Maximilianshuette Eisenwerk Process for making chromium steels
US3754894A (en) * 1972-04-20 1973-08-28 Joslyn Mfg & Supply Co Nitrogen control in argon oxygen refining of molten metal
JP3309395B2 (ja) * 1990-12-25 2002-07-29 住友金属工業株式会社 転炉精錬方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2022249798A1 *

Also Published As

Publication number Publication date
US20240271233A1 (en) 2024-08-15
TWI817507B (zh) 2023-10-01
CN117377781A (zh) 2024-01-09
TW202246528A (zh) 2022-12-01
EP4328330A1 (en) 2024-02-28
BR112023024464A2 (pt) 2024-02-06
JP7384294B2 (ja) 2023-11-21
KR20230162108A (ko) 2023-11-28
WO2022249798A1 (ja) 2022-12-01
JPWO2022249798A1 (enrdf_load_stackoverflow) 2022-12-01

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