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EP3954787C0 - Highly efficient molten iron alloy refining method - Google Patents

Highly efficient molten iron alloy refining method

Info

Publication number
EP3954787C0
EP3954787C0 EP19924226.4A EP19924226A EP3954787C0 EP 3954787 C0 EP3954787 C0 EP 3954787C0 EP 19924226 A EP19924226 A EP 19924226A EP 3954787 C0 EP3954787 C0 EP 3954787C0
Authority
EP
European Patent Office
Prior art keywords
molten iron
highly efficient
iron alloy
refining method
alloy refining
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.)
Active
Application number
EP19924226.4A
Other languages
German (de)
French (fr)
Other versions
EP3954787A4 (en
EP3954787B1 (en
EP3954787A1 (en
Inventor
Naoto Sasaki
Michitaka Matsuo
Kenichiro Naito
Sohichi Niino
Koji Morita
Takehiko Toh
Masamitsu Wakoh
Kazuo Onuki
Hiroshi Hirata
S I Semykin
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP3954787A1 publication Critical patent/EP3954787A1/en
Publication of EP3954787A4 publication Critical patent/EP3954787A4/en
Application granted granted Critical
Publication of EP3954787B1 publication Critical patent/EP3954787B1/en
Publication of EP3954787C0 publication Critical patent/EP3954787C0/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • C21C5/36—Processes yielding slags of special composition
    • 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
    • C21C5/32—Blowing from above
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] electric arc furnace
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5264—Manufacture of alloyed steels including ferro-alloys
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—Processes yielding slags of special composition
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • 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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • C21C2250/06—Hollow electrode
    • 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
    • C21C2300/08—Particular sequence of the process steps
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP19924226.4A 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method Active EP3954787B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/015737 WO2020208768A1 (en) 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method

Publications (4)

Publication Number Publication Date
EP3954787A1 EP3954787A1 (en) 2022-02-16
EP3954787A4 EP3954787A4 (en) 2022-11-30
EP3954787B1 EP3954787B1 (en) 2024-08-14
EP3954787C0 true EP3954787C0 (en) 2024-08-14

Family

ID=72751161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19924226.4A Active EP3954787B1 (en) 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method

Country Status (6)

Country Link
EP (1) EP3954787B1 (en)
JP (1) JP7158570B2 (en)
KR (1) KR102483106B1 (en)
CN (1) CN113631729B (en)
UA (1) UA128009C2 (en)
WO (1) WO2020208768A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025192355A1 (en) * 2024-03-15 2025-09-18 Ｊｆｅスチール株式会社 Method for refining molten iron

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117409Y2 (en) * 1978-12-27 1986-05-28
JPH0791574B2 (en) * 1992-09-29 1995-10-04 川崎重工業株式会社 Raw material charging method and apparatus for melting and refining furnace
ATA121393A (en) * 1993-06-21 1998-07-15 Voest Alpine Ind Anlagen CONVERTER AND METHOD FOR PRODUCING STEEL
JPH09227918A (en) * 1996-02-20 1997-09-02 Nippon Steel Corp Stainless steel melting method
JP3717625B2 (en) * 1997-02-05 2005-11-16 日新製鋼株式会社 Electric arc furnace slag reduction method
JP3332010B2 (en) * 1998-06-18 2002-10-07 日本鋼管株式会社 Manufacturing method of low phosphorus hot metal
JP2002371311A (en) * 2001-04-13 2002-12-26 Osaka Koukai Kk Method for dephosphorizing molten metal, dephosphorizing agent with low-temperature slag forming property therefor, and manufacturing method therefor
JP4388482B2 (en) 2005-01-18 2009-12-24 新日本製鐵株式会社 Slag processing method
CN101165196B (en) * 2006-10-19 2010-12-08 中国恩菲工程技术有限公司 Process and device for continuously smelting copper by adopting oxygen bottom-blowing furnace
JP2008266669A (en) * 2007-04-16 2008-11-06 Jfe Steel Kk Method and apparatus for measuring melt level in vertical furnace
WO2012108529A1 (en) * 2011-02-10 2012-08-16 新日本製鐵株式会社 Method for desiliconizing and dephosphorizing hot metal
JP5720497B2 (en) * 2011-08-25 2015-05-20 Ｊｆｅスチール株式会社 Method for recovering iron and phosphorus from steelmaking slag
CN103408013B (en) * 2013-08-03 2015-06-24 石家庄新华能源环保科技股份有限公司 Calcium carbide furnace with combination of oxygen heating method and electric heating method
JP6164151B2 (en) * 2014-05-14 2017-07-19 Ｊｆｅスチール株式会社 Method for refining molten iron using a converter-type refining furnace
JP6413710B2 (en) * 2014-12-02 2018-10-31 新日鐵住金株式会社 Production method of high purity steel by DC arc electric furnace
US11898797B2 (en) * 2016-12-16 2024-02-13 Nippon Steel Corporation Electric furnace
CN109097651B (en) * 2018-08-09 2019-06-28 徐州宏阳新材料科技有限公司 A kind of low-phosphorous high carbon ferro-chrome and its smelting process
CN109097522B (en) * 2018-09-30 2020-04-10 武钢集团昆明钢铁股份有限公司 Converter smelting method for molten steel residual manganese at medium-high manganese, high phosphorus and low silicon iron water extraction and improvement end point

Also Published As

Publication number Publication date
EP3954787A4 (en) 2022-11-30
KR102483106B1 (en) 2023-01-02
EP3954787B1 (en) 2024-08-14
EP3954787A1 (en) 2022-02-16
CN113631729A (en) 2021-11-09
KR20210127986A (en) 2021-10-25
WO2020208768A1 (en) 2020-10-15
UA128009C2 (en) 2024-03-06
JPWO2020208768A1 (en) 2020-10-15
CN113631729B (en) 2022-09-20
JP7158570B2 (en) 2022-10-21

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