EP4411000A4 - Molten iron production method - Google Patents

Molten iron production method Download PDF

Info

Publication number
EP4411000A4
EP4411000A4 EP22876211.8A EP22876211A EP4411000A4 EP 4411000 A4 EP4411000 A4 EP 4411000A4 EP 22876211 A EP22876211 A EP 22876211A EP 4411000 A4 EP4411000 A4 EP 4411000A4
Authority
EP
European Patent Office
Prior art keywords
production method
molten iron
iron production
molten
production
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
EP22876211.8A
Other languages
German (de)
French (fr)
Other versions
EP4411000A1 (en
Inventor
Toshiya Harada
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 EP4411000A1 publication Critical patent/EP4411000A1/en
Publication of EP4411000A4 publication Critical patent/EP4411000A4/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing agents
    • 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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2300/00—Process aspects
    • C21B2300/02—Particular sequence of the process steps
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—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
    • 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
    • C21C7/064—Dephosphorising; 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
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/076—Use of slags or fluxes as treating agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Charging Or Discharging (AREA)
EP22876211.8A 2021-09-30 2022-09-27 Molten iron production method Pending EP4411000A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021161078 2021-09-30
PCT/JP2022/035903 WO2023054345A1 (en) 2021-09-30 2022-09-27 Molten iron production method

Publications (2)

Publication Number Publication Date
EP4411000A1 EP4411000A1 (en) 2024-08-07
EP4411000A4 true EP4411000A4 (en) 2024-11-27

Family

ID=85782753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22876211.8A Pending EP4411000A4 (en) 2021-09-30 2022-09-27 Molten iron production method

Country Status (7)

Country Link
US (1) US20240368716A1 (en)
EP (1) EP4411000A4 (en)
JP (1) JP7518455B2 (en)
KR (1) KR102927395B1 (en)
CN (1) CN117858968A (en)
CA (1) CA3226561A1 (en)
WO (1) WO2023054345A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121358880A (en) * 2023-08-16 2026-01-16 日本制铁株式会社 Methods for melting iron sources
WO2025194266A1 (en) * 2024-03-20 2025-09-25 Hatch Ltd. Process and electric smelting furnace to produce hot metal from direct reduced iron
KR20260003929A (en) * 2024-07-01 2026-01-08 주식회사 포스코 Manufacturing method of steel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6597722B2 (en) * 1999-07-08 2003-07-22 Jp Steel Plantech Co. Apparatus for arc-melting cold iron source and method thereof
JP2011080143A (en) * 2009-09-10 2011-04-21 Jfe Steel Corp Method for producing molten pig iron
EP2210959B1 (en) * 2007-09-19 2017-06-07 Kabushiki Kaisha Kobe Seiko Sho Process for producing molten iron

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5178711A (en) * 1974-12-30 1976-07-08 Kawasaki Heavy Ind Ltd DENKIAAKUSHIKISEIKOHOHO OYOBI SONOSOCHI
JP3175079B2 (en) * 1996-02-20 2001-06-11 新日本製鐵株式会社 Iron-based scrap melting method
US6149709A (en) 1997-09-01 2000-11-21 Kabushiki Kaisha Kobe Seiko Sho Method of making iron and steel
CA2851604C (en) 2012-06-27 2015-11-10 Nippon Steel & Sumitomo Metal Corporation Method of reduction processing of steel-making slag
JP6003911B2 (en) 2014-01-30 2016-10-05 Ｊｆｅスチール株式会社 Phosphate fertilizer raw material, phosphate fertilizer and production method thereof
JP6395684B2 (en) 2015-09-14 2018-09-26 株式会社神戸製鋼所 Hot metal production method
JP6597332B2 (en) 2016-01-18 2019-10-30 日本製鉄株式会社 Phosphate fertilizer manufacturing method and phosphate fertilizer manufacturing apparatus
EP3557171A4 (en) 2016-12-16 2020-05-06 Nippon Steel Corporation ELECTRIC OVEN
JP6620781B2 (en) 2017-05-15 2019-12-18 Ｊｆｅスチール株式会社 Dust smelting reduction method and reuse method
JP7094259B2 (en) * 2019-11-21 2022-07-01 株式会社神戸製鋼所 Manufacturing method of molten steel
JP7364899B2 (en) 2020-02-27 2023-10-19 日本製鉄株式会社 Melting method of cold iron source with slag reduction
JP7544501B2 (en) 2020-03-31 2024-09-03 株式会社コーセー Vesicle composition and cosmetic preparation containing same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6597722B2 (en) * 1999-07-08 2003-07-22 Jp Steel Plantech Co. Apparatus for arc-melting cold iron source and method thereof
EP2210959B1 (en) * 2007-09-19 2017-06-07 Kabushiki Kaisha Kobe Seiko Sho Process for producing molten iron
JP2011080143A (en) * 2009-09-10 2011-04-21 Jfe Steel Corp Method for producing molten pig iron

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2023054345A1 *

Also Published As

Publication number Publication date
CA3226561A1 (en) 2023-04-06
US20240368716A1 (en) 2024-11-07
JPWO2023054345A1 (en) 2023-04-06
KR20240035546A (en) 2024-03-15
KR102927395B1 (en) 2026-02-19
JP7518455B2 (en) 2024-07-18
EP4411000A1 (en) 2024-08-07
WO2023054345A1 (en) 2023-04-06
CN117858968A (en) 2024-04-09

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