BR112015009665A2 - method for suppressing hot metal resulphurization after desulphurization treatment - Google Patents

method for suppressing hot metal resulphurization after desulphurization treatment

Info

Publication number
BR112015009665A2
BR112015009665A2 BR112015009665A BR112015009665A BR112015009665A2 BR 112015009665 A2 BR112015009665 A2 BR 112015009665A2 BR 112015009665 A BR112015009665 A BR 112015009665A BR 112015009665 A BR112015009665 A BR 112015009665A BR 112015009665 A2 BR112015009665 A2 BR 112015009665A2
Authority
BR
Brazil
Prior art keywords
hot metal
desulphurization
treatment
resulphurization
suppressing
Prior art date
Application number
BR112015009665A
Other languages
Portuguese (pt)
Inventor
Ichikawa Akira
Kikuchi Naoki
Suzuki Norihiko
Nakai Yoshie
Uchida Yuichi
Nabeshima Yuki
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 BR112015009665A2 publication Critical patent/BR112015009665A2/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
    • C21C1/06—Constructional features of mixers for pig-iron
    • 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
    • F27D27/00—Stirring devices for molten 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
    • C21C2300/00—Process aspects
    • C21C2300/08—Particular sequence of the process steps
    • 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
    • F27D27/00—Stirring devices for molten material
    • F27D2027/002—Gas stirring

Abstract

resumo patente de invenção: "método para suprimir ressulfurização de metal quente após tratamento de dessulfurização". método para suprimir ressulfurização de metal quente, na qual um tratamento de dessulfurização foi realizado, que é suprimida em um processo de fabricação de aço fundido a partir do metal quente pela realização do refino por descarburação ou similares no processo seguinte, sendo que a ressulfurização ocorre devido a partículas finas de escória de dessulfurização que são geradas durante o tratamento de dessulfurização de metal quente e suspensas em metal quente.um método para suprimir a ressulfurização de metal quente após o tratamento de dessulfurização de acordo com a presente invenção inclui realizar o tratamento de dessulfurização em metal quente em um recipiente de tratamento pelo uso de um aparelho de dessulfurização por agitação mecânica; a seguir, agitar o metal quente (3) pela injeção de um gás inerte no metal quente por um orifício de injeção de gás (6) formado em um impulsor (4) do aparelho de dessulfurização por agitação mecânica; fazer com que a escória de dessulfurização que é suspensa no metal quente devido à agitação e/ou a escória de dessulfurização que adere a uma parede interna do recipiente de tratamento flutue para uma superfície de banho do metal quente; descarregar a escória de dessulfurização flutuante do recipiente de tratamento; e, subsequentemente, transferir o metal quente no recipiente de tratamento para o próximo processo.Patent specification: "method for suppressing hot metal resulfurization after desulfurization treatment". A method for suppressing hot metal resulphurization, in which a desulphurization treatment has been carried out, which is suppressed in a hot-steel molten steel fabrication process by performing decarburization refining or the like in the following process, with resulphurization occurring. due to fine desulphurization slag particles that are generated during hot metal desulphurization treatment and suspended in hot metal. A method for suppressing hot metal resulphurization after desulphurization treatment according to the present invention includes performing the treatment of hot metal desulphurization in a treatment vessel by use of a mechanical stirring desulphurization apparatus; thereafter stirring the hot metal (3) by injecting an inert gas into the hot metal through a gas injection port (6) formed in a pusher (4) of the mechanical stirring desulfurization apparatus; causing the desulphurization slag that is suspended in the hot metal due to agitation and / or the desulphurization slag adhering to an inner wall of the treatment vessel to float to a hot metal bath surface; discharge the floating desulphurization slag from the treatment vessel; and subsequently transferring the hot metal into the treatment vessel for the next process.

BR112015009665A 2014-01-10 2015-01-05 method for suppressing hot metal resulphurization after desulphurization treatment BR112015009665A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014002806 2014-01-10
PCT/JP2015/000001 WO2015105035A1 (en) 2014-01-10 2015-01-05 Method for preventing resulfurization of molten pig iron after desulfurization

Publications (1)

Publication Number Publication Date
BR112015009665A2 true BR112015009665A2 (en) 2017-07-04

Family

ID=53523865

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112015009665A BR112015009665A2 (en) 2014-01-10 2015-01-05 method for suppressing hot metal resulphurization after desulphurization treatment

Country Status (6)

Country Link
JP (1) JP6052436B2 (en)
KR (1) KR101840962B1 (en)
CN (1) CN105899689B (en)
BR (1) BR112015009665A2 (en)
TW (1) TWI564396B (en)
WO (1) WO2015105035A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5285013A (en) 1976-01-09 1977-07-15 Kawasaki Steel Co Method and apparatus for desulphorizing of molten pig iron
JPH0499212A (en) * 1990-08-08 1992-03-31 Sumitomo Metal Ind Ltd Apparatus for desulfurizing molten iron
JPH04235210A (en) 1991-01-10 1992-08-24 Sumitomo Metal Ind Ltd Method for desulfurizing molten iron
JP2856106B2 (en) 1995-03-30 1999-02-10 住友金属工業株式会社 Hot metal desulfurization method
JP2001247910A (en) * 2000-03-03 2001-09-14 Nippon Steel Corp Method for stirring molten iron
JP3835350B2 (en) * 2002-05-30 2006-10-18 Ｊｆｅスチール株式会社 Rotating stirrer for molten metal
JP2005200762A (en) 2003-12-16 2005-07-28 Sumitomo Metal Ind Ltd Method for desulfurizing molten pig iron
JP2006028615A (en) * 2004-07-20 2006-02-02 Sumitomo Metal Ind Ltd Method for desulfurizing molten pig iron, and mechanically stirring device
JP4998676B2 (en) * 2006-03-29 2012-08-15 Ｊｆｅスチール株式会社 Method of stirring molten metal using impeller
JP6024192B2 (en) * 2012-05-15 2016-11-09 Ｊｆｅスチール株式会社 Method for preventing hot metal after desulphurization
CN103014218B (en) * 2012-12-30 2014-09-03 大冶特殊钢股份有限公司 KR stirring paddle and manufacture method thereof

Also Published As

Publication number Publication date
WO2015105035A1 (en) 2015-07-16
TW201540842A (en) 2015-11-01
JPWO2015105035A1 (en) 2017-03-23
JP6052436B2 (en) 2016-12-27
TWI564396B (en) 2017-01-01
KR20160106130A (en) 2016-09-09
KR101840962B1 (en) 2018-03-21
CN105899689A (en) 2016-08-24
CN105899689B (en) 2019-05-07

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Legal Events

Date Code Title Description
B06F Objections, documents and/or translations needed after an examination request according art. 34 industrial property law
B06U Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure
B06A Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements