IN2014KN01258A - - Google Patents

Info

Publication number
IN2014KN01258A
IN2014KN01258A IN1258KON2014A IN2014KN01258A IN 2014KN01258 A IN2014KN01258 A IN 2014KN01258A IN 1258KON2014 A IN1258KON2014 A IN 1258KON2014A IN 2014KN01258 A IN2014KN01258 A IN 2014KN01258A
Authority
IN
India
Prior art keywords
molten iron
dephosphorization refining
refining agent
dephosphorization
converter
Prior art date
Application number
Inventor
Yuichi Uchida
Yuma Igarashi
Hidemitsu Negishi
Naotaka Sasaki
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 IN2014KN01258A publication Critical patent/IN2014KN01258A/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
    • 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
    • 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
    • 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
    • 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
    • C21C7/0645—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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (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)

Abstract

[Problem] To provide a converter steelmaking method that is advantageous over the conventional method and that enables efficient dephosphorization refining during the manufacture of molten steel by simultaneous decarburization refining and dephosphorization refining of molten iron in a converter furnace. [Solution] A converter steelmaking method comprising manufacturing molten steel from molten iron by simultaneously decarburizing and dephosphorizing the molten iron by a process in which a powdered dephosphorization refining agent containing CaO is added while oxygen gas is supplied to a converter furnace and decarburization refining of molten iron is performed and the dephosphorization refining agent is deposited as slag wherein the dephosphorization refining agent is supplied to the molten iron bath surface together with at least one gas jet from a top lance and the dynamic pressure with which the gas jet from the top lance impinges on the molten iron bath surface is controlled to or below the appropriate value thereof obtained by quantitative evaluation of the increase in dynamic pressure due to the kinetic energy of the accompanying dephosphorization refining agent.
IN1258KON2014 2011-12-20 2012-12-19 IN2014KN01258A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011278224 2011-12-20
PCT/JP2012/082905 WO2013094634A1 (en) 2011-12-20 2012-12-19 Converter steelmaking method

Publications (1)

Publication Number Publication Date
IN2014KN01258A true IN2014KN01258A (en) 2015-10-16

Family

ID=48668518

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1258KON2014 IN2014KN01258A (en) 2011-12-20 2012-12-19

Country Status (8)

Country Link
US (1) US9493854B2 (en)
EP (1) EP2796569B1 (en)
JP (1) JP5574060B2 (en)
KR (1) KR101529843B1 (en)
CN (1) CN104126019B (en)
IN (1) IN2014KN01258A (en)
TW (1) TWI473883B (en)
WO (1) WO2013094634A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6180337B2 (en) * 2014-01-29 2017-08-16 株式会社神戸製鋼所 Dephosphorization method to change top blowing condition in converter type vessel
JP6421732B2 (en) * 2015-09-17 2018-11-14 Ｊｆｅスチール株式会社 Converter operation method
JP6421731B2 (en) * 2015-09-17 2018-11-14 Ｊｆｅスチール株式会社 Converter operation method
BR112018017087B1 (en) * 2016-02-24 2022-05-17 Jfe Steel Corporation Method for refining molten steel in vacuum degassing equipment
EP3564396B1 (en) * 2016-12-27 2022-10-12 JFE Steel Corporation Method for dephosphorization of molten iron, and refining agent
WO2018135351A1 (en) * 2017-01-18 2018-07-26 Ｊｆｅスチール株式会社 Molten iron dephosphorization method
CN107213723A (en) * 2017-06-15 2017-09-29 石嘴山市荣华缘冶金有限责任公司 Compressed air oil removing de-watering apparatus for steel-making
CN110621792A (en) * 2017-08-21 2019-12-27 日本制铁株式会社 Top-blowing lance for converter blowing and method for refining molten iron
JP6926928B2 (en) * 2017-10-18 2021-08-25 日本製鉄株式会社 Refining method of molten steel
CN108374070A (en) * 2018-05-04 2018-08-07 北京京科名创工程技术有限公司 It is blown injecting agitating device
CN110218842A (en) * 2019-07-02 2019-09-10 马鞍山钢铁股份有限公司 A kind of dephosphorization of molten iron device and method
JP7380444B2 (en) * 2020-06-24 2023-11-15 Ｊｆｅスチール株式会社 Top blowing lance for converter dephosphorization treatment and converter blowing method
CN116377172A (en) * 2023-03-19 2023-07-04 新疆八一钢铁股份有限公司 Operation method for efficient dephosphorization of converter
CN116334342B (en) * 2023-04-06 2024-06-14 广东中南钢铁股份有限公司 Method for reducing slag accumulation of overhead water tank of converter

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185707A (en) * 1982-04-23 1983-10-29 Sumitomo Metal Ind Ltd Refining method of steel
JP3402133B2 (en) * 1997-07-17 2003-04-28 住友金属工業株式会社 Top blowing lance for refining and refining method
JPH1192814A (en) * 1997-09-22 1999-04-06 Nkk Corp Converter blowing for restraining generation of dust
JPH1192815A (en) * 1997-09-22 1999-04-06 Nkk Corp Converter blowing for restraining generation of dust
JP2002105526A (en) * 2000-09-28 2002-04-10 Nippon Steel Corp Method for dephosphorizing molten iron generating little non-slagging lime
JP4273688B2 (en) * 2000-11-16 2009-06-03 Ｊｆｅスチール株式会社 Converter blowing method
JP4686873B2 (en) * 2001-02-28 2011-05-25 Ｊｆｅスチール株式会社 Hot phosphorus dephosphorization method
JP3854482B2 (en) * 2001-09-27 2006-12-06 新日本製鐵株式会社 Hot metal pretreatment method and refining method
JP2006274349A (en) 2005-03-29 2006-10-12 Sumitomo Metal Ind Ltd Method for refining steel
JP4901132B2 (en) * 2005-05-31 2012-03-21 Ｊｆｅスチール株式会社 Converter blowing method and top blowing lance for converter blowing
JP4363367B2 (en) * 2005-06-07 2009-11-11 住友金属工業株式会社 Converter refining method
JP5343506B2 (en) * 2008-10-20 2013-11-13 新日鐵住金株式会社 Hot phosphorus dephosphorization method
JP5644355B2 (en) * 2009-10-22 2014-12-24 Ｊｆｅスチール株式会社 Hot metal refining method
JP2013133520A (en) * 2011-12-27 2013-07-08 Jfe Steel Corp Method of dephosphorizing-refining molten iron

Also Published As

Publication number Publication date
US20140311295A1 (en) 2014-10-23
JPWO2013094634A1 (en) 2015-04-27
EP2796569B1 (en) 2017-08-02
TWI473883B (en) 2015-02-21
US9493854B2 (en) 2016-11-15
JP5574060B2 (en) 2014-08-20
KR20140090672A (en) 2014-07-17
CN104126019B (en) 2017-06-23
KR101529843B1 (en) 2015-06-17
WO2013094634A1 (en) 2013-06-27
CN104126019A (en) 2014-10-29
TW201331376A (en) 2013-08-01
EP2796569A4 (en) 2015-03-18
EP2796569A1 (en) 2014-10-29

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