IN2014DN07088A - - Google Patents

Info

Publication number
IN2014DN07088A
IN2014DN07088A IN7088DEN2014A IN2014DN07088A IN 2014DN07088 A IN2014DN07088 A IN 2014DN07088A IN 7088DEN2014 A IN7088DEN2014 A IN 7088DEN2014A IN 2014DN07088 A IN2014DN07088 A IN 2014DN07088A
Authority
IN
India
Prior art keywords
flow path
refining
supply flow
oxidizing gas
hot metal
Prior art date
Application number
Inventor
Kenji Nakase
Yukio Takahashi
Naoki Kikuchi
Goro Okuyama
Shingo Sato
Yuichi Uchida
Yuji Miki
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 IN2014DN07088A publication Critical patent/IN2014DN07088A/en

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
    • C21C5/30—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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for 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
    • 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
    • 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
    • C21C5/4606—Lances or injectors
    • 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
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • 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
    • C21C7/068—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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

Provided is a method for refining hot metal in a converter that is used during the formation of flames by using a burner in a tip end portion of a top blowing lance the wearing of the heat of the flames onto the hot metal and the dephosphorization and decarburization refining of the hot metal in the converter. According to the present invention there is no concern of heat generation and combustion of the top blowing lance in a flow path wearing heat efficiency and productivity are excellent and it is possible to increase the blending ratio of a cold iron source such as iron scrap. A top blowing lance (3) that comprises a refining powder supply flow path a combustion oxidizing gas supply flow path and a refining oxidizing gas supply flow path is used to supply one or more types of refining powder (29) among a lime based solvent medium iron oxide and a combustible material and fuel gas or gas in which the fuel gas is mixed with inert gas as transport gas from the refining powder supply flow path toward a hot metal bath surface. Combustion oxidizing gas is supplied from the combustion oxidizing gas supply flow path so as to form the flames downward from a tip of the top blowing lance and refining oxidizing gas is supplied from the combustion oxidizing gas supply flow path toward the hot metal bath surface.
IN7088DEN2014 2012-03-29 2013-03-25 IN2014DN07088A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012075928 2012-03-29
JP2012239975A JP6036172B2 (en) 2012-03-29 2012-10-31 Method of refining hot metal in converter
PCT/JP2013/001997 WO2013145686A1 (en) 2012-03-29 2013-03-25 Method for refining hot metal in converter

Publications (1)

Publication Number Publication Date
IN2014DN07088A true IN2014DN07088A (en) 2015-04-10

Family

ID=49258990

Family Applications (1)

Application Number Title Priority Date Filing Date
IN7088DEN2014 IN2014DN07088A (en) 2012-03-29 2013-03-25

Country Status (10)

Country Link
US (1) US9957581B2 (en)
EP (1) EP2808407B1 (en)
JP (1) JP6036172B2 (en)
KR (1) KR101684378B1 (en)
CN (1) CN104245965B (en)
BR (1) BR112014023560B1 (en)
IN (1) IN2014DN07088A (en)
TR (1) TR201808805T4 (en)
TW (1) TWI544082B (en)
WO (1) WO2013145686A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6398306B2 (en) * 2014-05-14 2018-10-03 新日鐵住金株式会社 Converter melting method of iron-containing raw materials
JP6466733B2 (en) * 2015-02-18 2019-02-06 株式会社神戸製鋼所 Supply method of solid oxygen source in dephosphorization of hot metal
KR101651221B1 (en) 2015-04-21 2016-08-25 충남대학교산학협력단 Lance for prevent pulling flame
JP6327298B2 (en) * 2015-09-01 2018-05-23 Ｊｆｅスチール株式会社 Hot metal refining method
WO2019064433A1 (en) * 2017-09-28 2019-04-04 大陽日酸株式会社 Method for adjusting melting-refining furnace and melting-refining furnace
TWI735668B (en) * 2017-09-29 2021-08-11 日商大陽日酸股份有限公司 Method for operating melting/refining furnace and melting/refining furnace
CN111826499B (en) * 2020-06-30 2021-12-03 东北大学 Blast furnace molten iron decarburization treatment method based on converter LT fly ash
CN111809019B (en) * 2020-06-30 2021-12-03 东北大学 Blast furnace molten iron decarbonization method by using blast furnace ash
CN116745439A (en) * 2021-02-01 2023-09-12 杰富意钢铁株式会社 Top-blowing lance for converter, method for adding auxiliary raw material, and method for refining molten iron
CN115323101B (en) * 2022-08-02 2023-12-15 鞍钢股份有限公司 Method for rapidly igniting oxygen lance of converter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949794C2 (en) * 1979-12-11 1984-01-19 Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg Process of supplying carbon to a molten iron in the converter
US4642047A (en) * 1984-08-17 1987-02-10 American Combustion, Inc. Method and apparatus for flame generation and utilization of the combustion products for heating, melting and refining
JP3577365B2 (en) 1995-06-30 2004-10-13 新日本製鐵株式会社 Hot metal pretreatment method
JPH1180825A (en) 1997-09-09 1999-03-26 Nippon Steel Corp Top-blown lance for converter refining and converter refining method by using this
JP2001323312A (en) 2000-05-12 2001-11-22 Nippon Steel Corp Method for utilizing reaction heat generated by secondary combustion
JP4735169B2 (en) * 2005-09-30 2011-07-27 Ｊｆｅスチール株式会社 Hot metal dephosphorization method
WO2009119604A1 (en) * 2008-03-25 2009-10-01 株式会社神戸製鋼所 Process for producing molten iron
JP5606320B2 (en) * 2008-09-16 2014-10-15 株式会社Ｉｓｔｃ Manufacturing method of molten iron
JP2010156025A (en) * 2008-12-29 2010-07-15 Jfe Steel Corp Burner lance for charging powdery and granular material into smelting reduction furnace, and method for producing molten metal by smelting reduction
JP2012031452A (en) * 2010-07-29 2012-02-16 Jfe Steel Corp Method of dephosphorizing hot metal

Also Published As

Publication number Publication date
KR20140133602A (en) 2014-11-19
JP6036172B2 (en) 2016-11-30
EP2808407A1 (en) 2014-12-03
EP2808407B1 (en) 2018-05-23
EP2808407A4 (en) 2015-09-02
TR201808805T4 (en) 2018-07-23
CN104245965A (en) 2014-12-24
TW201343922A (en) 2013-11-01
BR112014023560B1 (en) 2020-02-18
CN104245965B (en) 2016-07-20
WO2013145686A1 (en) 2013-10-03
JP2013227650A (en) 2013-11-07
KR101684378B1 (en) 2016-12-08
US20150020648A1 (en) 2015-01-22
TWI544082B (en) 2016-08-01
US9957581B2 (en) 2018-05-01

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