CA2166097A1 - Process for producing steel by converter - Google Patents

Process for producing steel by converter

Info

Publication number
CA2166097A1
CA2166097A1 CA002166097A CA2166097A CA2166097A1 CA 2166097 A1 CA2166097 A1 CA 2166097A1 CA 002166097 A CA002166097 A CA 002166097A CA 2166097 A CA2166097 A CA 2166097A CA 2166097 A1 CA2166097 A1 CA 2166097A1
Authority
CA
Canada
Prior art keywords
dephosphorizing
converter
treatment
decarbonizing
hot metal
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.)
Granted
Application number
CA002166097A
Other languages
French (fr)
Other versions
CA2166097C (en
Inventor
Masataka Yano
Yuji Ogawa
Masayuki Arai
Fumio Koizumi
Noriyuki Masumitsu
Hideaki Sasaki
Hiroshi Hirata
Yoshiaki Kusano
Hirobumi Maede (Deceased)
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
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27519242&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2166097(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP16256493A external-priority patent/JP2958842B2/en
Priority claimed from JP32908693A external-priority patent/JP2896838B2/en
Priority claimed from JP32908893A external-priority patent/JP2958848B2/en
Priority claimed from JP01102794A external-priority patent/JP3239197B2/en
Application filed by Individual filed Critical Individual
Publication of CA2166097A1 publication Critical patent/CA2166097A1/en
Application granted granted Critical
Publication of CA2166097C publication Critical patent/CA2166097C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C21C5/34—Blowing 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
    • C21C5/30—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
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/567—Manufacture of steel by other methods operating in a continuous way
    • 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
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0075—Regulation of the charge quantity
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0078—Regulation of the speed of the gas through the charge
    • 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

The present invention provides a process for efficiently dephosphorizing, dephosphorizing and decarbonizing, or desulfurizing, dephosphorizing and decarbonizing a hot metal in a converter.
The amount of flux to be charged and the amount of bottom-blown gas are adjusted so that the bottom-blowing agitation power and the CaO/SiO2 ratio subsequent to the treatment become at least 0.1 kW/ton and from 0.7 to 2.5, respectively and the hot metal temperature at the treatment end point becomes from 1,200 to 1,450°C. Furthermore, the operation of the process is controlled so that the sum of a T.Fe concentration and a MnO concentration in the slag subsequent to the treatment becomes from 10 to 35% by weight by adjusting the top-blown oxygen feed rate, the flow rate of bottom-blown gas or the top-blowing lance height.
CA002166097A 1993-06-30 1994-06-30 Process for producing steel by converter Expired - Lifetime CA2166097C (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP16256493A JP2958842B2 (en) 1993-06-30 1993-06-30 Converter refining method
JP5-162564 1993-06-30
JP16579093 1993-07-05
JP5-165790 1993-07-05
JP32908693A JP2896838B2 (en) 1993-12-24 1993-12-24 Molten steel manufacturing method
JP5-329086 1993-12-24
JP32908893A JP2958848B2 (en) 1993-12-24 1993-12-24 Hot metal dephosphorization method
JP01102794A JP3239197B2 (en) 1993-07-05 1994-02-02 Converter steelmaking method
PCT/JP1994/001070 WO1995001458A1 (en) 1993-06-30 1994-06-30 Steel manufacturing method using converter

Publications (2)

Publication Number Publication Date
CA2166097A1 true CA2166097A1 (en) 1995-01-12
CA2166097C CA2166097C (en) 2002-01-15

Family

ID=27519242

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002166097A Expired - Lifetime CA2166097C (en) 1993-06-30 1994-06-30 Process for producing steel by converter

Country Status (9)

Country Link
EP (1) EP0714989B1 (en)
KR (1) KR0159180B1 (en)
CN (1) CN1041843C (en)
AU (1) AU680268B2 (en)
BR (1) BR9406985A (en)
CA (1) CA2166097C (en)
DE (1) DE69423630T2 (en)
ES (1) ES2143547T3 (en)
WO (1) WO1995001458A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3940280B2 (en) * 2001-09-27 2007-07-04 新日本製鐵株式会社 How to remove hot metal
JP3854482B2 (en) * 2001-09-27 2006-12-06 新日本製鐵株式会社 Hot metal pretreatment method and refining method
DE10215828B4 (en) * 2002-04-10 2007-08-02 Sms Demag Ag Method and device for producing stainless steel, in particular chromium- or chromium-nickel-containing stainless steel
DE10215839A1 (en) * 2002-04-10 2003-11-06 Sms Demag Ag Method and device for producing carbon steels or stainless steels by refining phosphorus-rich pig iron in an electric arc furnace or in a converter vessel
US20070179161A1 (en) * 2003-03-31 2007-08-02 Vernalis (Cambridge) Limited. Pyrazolopyrimidine compounds and their use in medicine
EP1524322A3 (en) * 2003-10-15 2006-08-02 Milan Adelt Method of liquid steel production with slag recycling in a converter, equipment to employ the method
KR100749023B1 (en) * 2006-05-26 2007-08-14 주식회사 포스코 Method for refining extra low phosphorous steel in converter
CN101864508B (en) * 2010-07-02 2012-10-24 张觉灵 Steel making method of convertor with small slag quantity
CN102071277B (en) * 2010-12-23 2012-10-24 攀钢集团钢铁钒钛股份有限公司 Converter dephosphorizing and steelmaking method
CN102168160B (en) * 2011-03-08 2013-04-17 武汉钢铁(集团)公司 Converter steelmaking technology for directly reducing-alloying manganese ore
JP5979017B2 (en) * 2012-01-19 2016-08-24 Ｊｆｅスチール株式会社 Hot metal refining method
JP5790964B2 (en) * 2013-01-18 2015-10-07 Ｊｆｅスチール株式会社 Hot metal pretreatment method
CN104451022B (en) * 2014-12-19 2016-03-16 山东钢铁股份有限公司 A kind of method reducing dephosphorization stove finishing slag all iron content
KR101660774B1 (en) 2015-07-09 2016-09-28 주식회사 포스코 The converter operation method
WO2017130837A1 (en) * 2016-01-28 2017-08-03 新日鐵住金株式会社 Slag removal method, slag production method, and structure for attenuating energy of falling slag
KR102065455B1 (en) * 2016-07-14 2020-01-13 닛폰세이테츠 가부시키가이샤 Phosphorus concentration estimation method and converter blow control device in molten steel
CN106282487B (en) * 2016-09-13 2019-03-29 北京北科中钢工程技术有限公司 A kind of pre-dephosporizing method for molten iron
WO2018216660A1 (en) * 2017-05-25 2018-11-29 Ｊｆｅスチール株式会社 Method for manufacturing high manganese steel ingot
CN109097523B (en) * 2018-08-31 2019-12-24 钢铁研究总院 Double-slag smelting process
CN114438276B (en) * 2022-02-11 2022-08-09 山东钢铁集团永锋临港有限公司 Method for shortening smelting period of converter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6823981A (en) * 1980-03-21 1981-10-15 Nippon Steel Corporation Multi-stage steel making
JPS58207314A (en) * 1982-05-28 1983-12-02 Sumitomo Metal Ind Ltd Refining method of steel
DE3316367A1 (en) * 1983-05-05 1984-11-08 Mannesmann AG, 4000 Düsseldorf METHOD AND DEVICE FOR PRODUCING STEEL
FR2558482B1 (en) * 1984-01-25 1989-10-27 Siderurgie Fse Inst Rech PROCESS FOR THE PREPARATION OF STEEL BY CAST IRON
JPH0472007A (en) * 1990-07-10 1992-03-06 Nippon Steel Corp Production of molten steel
JP2607329B2 (en) * 1992-03-04 1997-05-07 新日本製鐵株式会社 Hot metal dephosphorization method
JP2607328B2 (en) * 1992-03-04 1997-05-07 新日本製鐵株式会社 Hot metal dephosphorization method

Also Published As

Publication number Publication date
WO1995001458A1 (en) 1995-01-12
DE69423630D1 (en) 2000-04-27
KR960703440A (en) 1996-08-17
CN1128050A (en) 1996-07-31
KR0159180B1 (en) 1999-01-15
BR9406985A (en) 1996-03-05
AU680268B2 (en) 1997-07-24
ES2143547T3 (en) 2000-05-16
CN1041843C (en) 1999-01-27
AU7083194A (en) 1995-01-24
EP0714989A1 (en) 1996-06-05
EP0714989A4 (en) 1997-06-25
DE69423630T2 (en) 2000-11-09
EP0714989B1 (en) 2000-03-22
CA2166097C (en) 2002-01-15

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Effective date: 20140630