WO2012108529A1 - Procédé de désiliconisation et de déphosphorisation d'un métal chaud - Google Patents

Procédé de désiliconisation et de déphosphorisation d'un métal chaud Download PDF

Info

Publication number
WO2012108529A1
WO2012108529A1 PCT/JP2012/053132 JP2012053132W WO2012108529A1 WO 2012108529 A1 WO2012108529 A1 WO 2012108529A1 JP 2012053132 W JP2012053132 W JP 2012053132W WO 2012108529 A1 WO2012108529 A1 WO 2012108529A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
hot metal
dephosphorization
desiliconization
amount
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.)
Ceased
Application number
PCT/JP2012/053132
Other languages
English (en)
Japanese (ja)
Inventor
務川　進
周 松本
剛司 中嶋
吹上　和徳
智晶 田崎
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
Priority to KR1020137020963A priority Critical patent/KR101430377B1/ko
Priority to CN201280008125.8A priority patent/CN103370426B/zh
Priority to JP2012530820A priority patent/JP5170348B2/ja
Priority to BR112013020045A priority patent/BR112013020045B1/pt
Publication of WO2012108529A1 publication Critical patent/WO2012108529A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
    • 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
    • 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
    • C21C7/076—Use of slags or fluxes as treating 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
    • C21C2300/00—Process aspects
    • C21C2300/08—Particular sequence of the process steps
    • 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

Definitions

  • the hot metal contains impurities other than phosphorus, and in recent years, iron ores with a high Si content are often used from the viewpoint of reducing manufacturing costs.
  • the object of the present invention is to solve the above-mentioned problems and to occur at the molten steel stage as an oxygen ion supply source used for dephosphorization / desiliconization reaction of hot metal (for example, 0.4% by mass or more) having a higher Si concentration. While reducing the total slag discharge at the molten steel stage using recycled slag, by suppressing slag forming, it is possible to effectively prevent slopping without increasing the furnace volume. It is to provide a dephosphorization method.
  • the hot metal desiliconization / phosphorus removal method according to the above (1), after the silicon concentration in the hot metal is reduced to 0.15% by mass or less, fine silicon lime is sprayed on the hot metal surface to thereby obtain a silicon concentration in the hot metal. Even if it is high, desiliconization of hot metal and dephosphorization can be efficiently performed by the same treatment.
  • the suppression of slopping by this method is particularly effective when dephosphorization of high Si hot metal is performed in a short time, when secondary refining slag containing Al 2 O 3 that promotes slag forming is recycled, or when a large amount of converters are used. This is effective when recycling slag (decarburized slag).
  • W s [% Si] ⁇ 60 ⁇ 1000/28/100 ⁇ [1 + 100 (C / S) ⁇ ( ⁇ 1/100 + ⁇ 2 / (% CaO) LD + ⁇ 3 / (% CaO) SR)] ⁇ W m ' (Formula 6)
  • ⁇ 1 , ⁇ 2 , ⁇ 3 the proportion of fine calcium oxide, decarburized slag, and the amount of CaO in secondary refining slag in the total CaO amount ( ⁇ )
  • (% CaO) LD decarburized slag CaO concentration (mass%) in the medium
  • (% CaO) SR CaO concentration (mass%) in the secondary refining slag.
  • [% X] represents a mass percentage of the chemical component X in the metal (here, hot metal)
  • (% X) represents a mass percentage of the chemical component X in the slag.
  • This limestone powder also acts as a CaO source, but is mainly used for stirring.
  • a mineral-derived bulk CaO source (for example, a primary CaO source) may be supplied from the hopper 8 for fine adjustment of basicity.
  • the amount of the bulk CaO source having an average particle size of 5 mm or more is preferably limited to 7.5 kg or less, more preferably 7.0 kg or less or 5.0 kg or less per 1 ton of molten iron, It is more preferable to limit to 1 kg or less, and it is most preferable to limit to 0 kg.
  • the amount of secondary refining slag added to the hot metal is preferably 0.1 to 16 kg / t. If the amount of secondary refining slag added is too small, the effect of improving the Mn concentration in the hot metal as compared with the prior art is not sufficiently obtained. On the other hand, if the amount of secondary refining slag added is too large, the amount of slag in the desiliconization / phosphorization treatment increases and a slopping phenomenon is likely to occur. In this case, a large amount of fine powdered lime is required to suppress the slopping phenomenon.
  • FIG. 1 is a diagram showing desiliconization / dephosphorization processing in a dephosphorization furnace
  • FIG. 4 is a diagram showing decarburization blowing in the decarburization furnace.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

La présente invention se rapporte à un procédé de désiliconisation et de déphosphorisation d'un métal chaud, ledit procédé comprenant : une étape de soufflage d'oxygène au cours de laquelle l'oxygène est soufflé vers la surface du métal chaud par le haut du four ; une étape d'ajout de scories à recycler au cours de laquelle des scories de décarburation et/ou des scories de raffinage secondaire sont amenées vers la surface du métal chaud ; et une étape d'ajout de chaux calcinée en poudre fine au cours de laquelle la chaux calcinée en fine poudre qui présente un diamètre particulaire maximal égal ou inférieur à 500 μm est fourni de sorte à accompagner le soufflage de l'oxygène vers la surface du métal chaud. L'étape d'ajout de chaux calcinée en poudre fine est commencée au moment où la concentration en silicium dans le métal chaud a diminué jusqu'à la plage allant de 0 à 0,15 % en masse (inclus).
PCT/JP2012/053132 2011-02-10 2012-02-10 Procédé de désiliconisation et de déphosphorisation d'un métal chaud Ceased WO2012108529A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020137020963A KR101430377B1 (ko) 2011-02-10 2012-02-10 용선의 탈규 탈인 동일 처리 방법
CN201280008125.8A CN103370426B (zh) 2011-02-10 2012-02-10 铁液的脱硅和脱磷方法
JP2012530820A JP5170348B2 (ja) 2011-02-10 2012-02-10 溶銑の脱珪・脱リン方法
BR112013020045A BR112013020045B1 (pt) 2011-02-10 2012-02-10 método de dessiliconização e desfosforação de ferro gusa fundido

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2011027338 2011-02-10
JP2011-027338 2011-02-10
JP2011041220 2011-02-28
JP2011-041220 2011-02-28

Publications (1)

Publication Number Publication Date
WO2012108529A1 true WO2012108529A1 (fr) 2012-08-16

Family

ID=46638741

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/053132 Ceased WO2012108529A1 (fr) 2011-02-10 2012-02-10 Procédé de désiliconisation et de déphosphorisation d'un métal chaud

Country Status (5)

Country Link
JP (1) JP5170348B2 (fr)
KR (1) KR101430377B1 (fr)
CN (1) CN103370426B (fr)
BR (1) BR112013020045B1 (fr)
WO (1) WO2012108529A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2020208768A1 (fr) * 2019-04-11 2020-10-15
JP2022006385A (ja) * 2020-06-24 2022-01-13 Ｊｆｅスチール株式会社 転炉脱りん処理用上吹きランスおよび転炉吹錬方法
JP2023049462A (ja) * 2021-09-29 2023-04-10 日本製鉄株式会社 溶銑の脱りん方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6544480B2 (ja) * 2016-03-17 2019-07-17 日本製鉄株式会社 溶銑予備処理方法
KR102221483B1 (ko) * 2019-06-20 2021-03-02 주식회사 에스에이씨 저탄소 및 저린 페로망간 합금철 제조 방법 및 설비
CN113621869B (zh) * 2021-08-27 2022-06-21 昆明理工大学 一种从含铂族金属的铁硅磷合金中去除硅和磷的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0718318A (ja) * 1993-06-30 1995-01-20 Nippon Steel Corp 転炉精錬方法
JPH11269524A (ja) * 1998-03-19 1999-10-05 Nippon Steel Corp 溶銑予備処理方法
JP2002047509A (ja) * 2000-07-31 2002-02-15 Sumitomo Metal Ind Ltd 溶銑の精錬方法
JP2002256320A (ja) * 2001-02-27 2002-09-11 Nippon Steel Corp 溶銑の脱珪・脱りん方法
JP2010150574A (ja) * 2008-12-24 2010-07-08 Nippon Steel Corp 溶銑の脱珪脱りん方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0718318A (ja) * 1993-06-30 1995-01-20 Nippon Steel Corp 転炉精錬方法
JPH11269524A (ja) * 1998-03-19 1999-10-05 Nippon Steel Corp 溶銑予備処理方法
JP2002047509A (ja) * 2000-07-31 2002-02-15 Sumitomo Metal Ind Ltd 溶銑の精錬方法
JP2002256320A (ja) * 2001-02-27 2002-09-11 Nippon Steel Corp 溶銑の脱珪・脱りん方法
JP2010150574A (ja) * 2008-12-24 2010-07-08 Nippon Steel Corp 溶銑の脱珪脱りん方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2020208768A1 (fr) * 2019-04-11 2020-10-15
WO2020208768A1 (fr) * 2019-04-11 2020-10-15 日本製鉄株式会社 Procédé de raffinage d'alliage de fer fondu hautement efficace
JP7158570B2 (ja) 2019-04-11 2022-10-21 日本製鉄株式会社 効率の高い溶融鉄合金の精錬方法
JP2022006385A (ja) * 2020-06-24 2022-01-13 Ｊｆｅスチール株式会社 転炉脱りん処理用上吹きランスおよび転炉吹錬方法
JP7380444B2 (ja) 2020-06-24 2023-11-15 Ｊｆｅスチール株式会社 転炉脱りん処理用上吹きランスおよび転炉吹錬方法
JP2023049462A (ja) * 2021-09-29 2023-04-10 日本製鉄株式会社 溶銑の脱りん方法

Also Published As

Publication number Publication date
CN103370426B (zh) 2014-10-15
KR20130105732A (ko) 2013-09-25
JPWO2012108529A1 (ja) 2014-07-03
KR101430377B1 (ko) 2014-08-13
CN103370426A (zh) 2013-10-23
BR112013020045B1 (pt) 2018-07-24
BR112013020045A2 (pt) 2016-10-25
JP5170348B2 (ja) 2013-03-27

Similar Documents

Publication Publication Date Title
JP6693536B2 (ja) 転炉製鋼方法
JP5170348B2 (ja) 溶銑の脱珪・脱リン方法
WO1995001458A1 (fr) Procede de production et d'acier au moyen d'un convertisseur
JP6665884B2 (ja) 転炉製鋼方法
JP6011728B2 (ja) 溶銑の脱燐処理方法
WO2014068933A1 (fr) Procédé d'affinage de métal chaud
JP2018024898A (ja) 脱りん効率と鉄分歩留に優れた溶銑の脱りん方法
JP5233378B2 (ja) 溶銑の脱燐方法
JP5268019B2 (ja) 溶銑の脱りん方法
JP2006274349A (ja) 鋼の精錬方法
JP6773131B2 (ja) 溶銑の予備処理方法と極低燐鋼の製造方法
JP6992604B2 (ja) リン酸スラグ肥料の製造方法
JP5772645B2 (ja) 溶銑の脱りん処理方法
JP2002220615A (ja) 転炉製鋼方法
JP5272378B2 (ja) 溶銑の脱燐処理方法
WO2007100109A1 (fr) Procede de dephosphoration de la fonte liquide
JP4894325B2 (ja) 溶銑の脱燐処理方法
JP4210011B2 (ja) 転炉を用いた溶銑の脱燐方法
JP4977870B2 (ja) 製鋼方法
JP5286892B2 (ja) 溶銑の脱りん精錬方法
JP5131870B2 (ja) 溶銑の脱燐処理方法
JP2001049320A (ja) 高燐鉱石を原料とする鉄鋼製造方法
JP2016079462A (ja) 溶銑の精錬方法
JP5402383B2 (ja) 転炉を用いる製鋼精錬プロセスおよび低燐鋼の製造方法
JP7803466B1 (ja) 溶鉄の精錬方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2012530820

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12745183

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20137020963

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112013020045

Country of ref document: BR

122 Ep: pct application non-entry in european phase

Ref document number: 12745183

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 112013020045

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20130806