JPWO2022249798A5 - - Google Patents

Download PDF

Info

Publication number
JPWO2022249798A5
JPWO2022249798A5 JP2022545913A JP2022545913A JPWO2022249798A5 JP WO2022249798 A5 JPWO2022249798 A5 JP WO2022249798A5 JP 2022545913 A JP2022545913 A JP 2022545913A JP 2022545913 A JP2022545913 A JP 2022545913A JP WO2022249798 A5 JPWO2022249798 A5 JP WO2022249798A5
Authority
JP
Japan
Prior art keywords
molten iron
refining
iron
mass
treatment
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
JP2022545913A
Other languages
Japanese (ja)
Other versions
JP7384294B2 (en
JPWO2022249798A1 (en
Filing date
Publication date
Application filed filed Critical
Priority claimed from PCT/JP2022/018168 external-priority patent/WO2022249798A1/en
Publication of JPWO2022249798A1 publication Critical patent/JPWO2022249798A1/ja
Publication of JPWO2022249798A5 publication Critical patent/JPWO2022249798A5/ja
Application granted granted Critical
Publication of JP7384294B2 publication Critical patent/JP7384294B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Claims (9)

炭素濃度［Ｃ］ｉを０．５質量％以上３．０質量％以下とした処理前溶鉄を容器に収容し、該処理前溶鉄に大気圧下で酸素を吹精するとともに、水素ガスもしくは炭化水素ガスまたはそれらの混合ガスを吹き込んで前記処理前溶鉄の脱炭および脱窒処理を行なう、溶鉄の精錬方法。 Pre-treatment molten iron having a carbon concentration [C] i of 0.5% by mass or more and 3.0% by mass or less is placed in a container, oxygen is blown to the pre-treatment molten iron under atmospheric pressure, and hydrogen gas or carbonization is performed. A method of refining molten iron, comprising blowing in hydrogen gas or a mixed gas thereof to decarburize and denitrify the molten iron before treatment. 前記脱炭および脱窒処理を施した後の処理後溶鉄の窒素濃度［Ｎ］ｆを３０質量ｐｐｍ以下とする、請求項１に記載の溶鉄の精錬方法。 2. The method of refining molten iron according to claim 1, wherein the nitrogen concentration [N] f of the molten iron after the decarburization and denitrification treatments is 30 ppm by mass or less. 前記脱炭および脱窒処理を施した後の処理後溶鉄に、さらに真空脱ガス処理を施す、請求項１に記載の溶鉄の精錬方法。 2. The method of refining molten iron according to claim 1 , wherein the treated molten iron after the decarburization and denitrification treatments is further subjected to a vacuum degassing treatment. 前記脱炭および脱窒処理を施した後の処理後溶鉄に、さらに真空脱ガス処理を施す、請求項２に記載の溶鉄の精錬方法。3. The molten iron refining method according to claim 2, wherein the treated molten iron after the decarburization and denitrification treatments is further subjected to a vacuum degassing treatment. 前記処理前溶鉄は、冷鉄源を溶解して得たものを含む、または、冷鉄源を溶解炉で溶解して得た１次溶鉄と炭素濃度が２．０質量％以上の溶銑とを混合したものである、請求項１ないし４のいずれか１項に記載の溶鉄の精錬方法。 The molten iron before treatment includes molten iron obtained by melting a cold iron source, or primary molten iron obtained by melting a cold iron source in a melting furnace and molten iron having a carbon concentration of 2.0% by mass or more. The method for refining molten iron according to any one of claims 1 to 4 , wherein the molten iron is a mixture . 前記冷鉄源が還元鉄を含む、請求項５に記載の溶鉄の精錬方法。 6. The method of refining molten iron according to claim 5 , wherein the cold iron source comprises reduced iron. 前記容器が転炉である、請求項１ないし４のいずれか１項に記載の溶鉄の精錬方法。 The method for refining molten iron according to any one of claims 1 to 4 , wherein the vessel is a converter. 前記容器が転炉である、請求項５に記載の溶鉄の精錬方法。The method for refining molten iron according to claim 5, wherein the vessel is a converter. 前記容器が転炉である、請求項６に記載の溶鉄の精錬方法。7. The method of refining molten iron according to claim 6, wherein the vessel is a converter.
JP2022545913A 2021-05-26 2022-04-19 Molten iron refining method Active JP7384294B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2021088031 2021-05-26
JP2021088031 2021-05-26
PCT/JP2022/018168 WO2022249798A1 (en) 2021-05-26 2022-04-19 Method for refining molten iron

Publications (3)

Publication Number Publication Date
JPWO2022249798A1 JPWO2022249798A1 (en) 2022-12-01
JPWO2022249798A5 true JPWO2022249798A5 (en) 2023-05-02
JP7384294B2 JP7384294B2 (en) 2023-11-21

Family

ID=84229902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2022545913A Active JP7384294B2 (en) 2021-05-26 2022-04-19 Molten iron refining method

Country Status (7)

Country Link
EP (1) EP4328330A1 (en)
JP (1) JP7384294B2 (en)
KR (1) KR20230162108A (en)
CN (1) CN117377781A (en)
BR (1) BR112023024464A2 (en)
TW (1) TWI817507B (en)
WO (1) WO2022249798A1 (en)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147509A (en) * 1982-02-26 1983-09-02 Kawasaki Steel Corp Refining method of stainless steel
JPS5925916A (en) * 1982-08-02 1984-02-10 Kawasaki Steel Corp Refining method of chromium containing alloy pig
JPS60194009A (en) * 1984-03-14 1985-10-02 Kawasaki Steel Corp Method for refining stainless steel
JPS61223117A (en) * 1985-03-29 1986-10-03 Kawasaki Steel Corp Method for reducing and recovering metallic oxide in molten slag
JP3309395B2 (en) * 1990-12-25 2002-07-29 住友金属工業株式会社 Converter refining method
JP2754983B2 (en) * 1991-09-26 1998-05-20 住友金属工業株式会社 Converter refining method
JP3496529B2 (en) 1998-07-29 2004-02-16 住友金属工業株式会社 RH vacuum refining method
JP3922181B2 (en) 2002-12-27 2007-05-30 Ｊｆｅスチール株式会社 Melting method of high clean steel
JP5092245B2 (en) 2006-02-09 2012-12-05 Ｊｆｅスチール株式会社 Denitrification method for molten steel
JP5428447B2 (en) 2008-03-31 2014-02-26 Ｊｆｅスチール株式会社 Method for refining molten steel in RH vacuum degassing equipment
JP5526565B2 (en) 2009-03-09 2014-06-18 Ｊｆｅスチール株式会社 Converter steelmaking
JP5589688B2 (en) 2009-09-10 2014-09-17 Ｊｆｅスチール株式会社 Hot metal production method
JP5910579B2 (en) 2013-08-01 2016-04-27 Ｊｆｅスチール株式会社 Melting method of ultra-low nitrogen pure iron
CN109852766B (en) * 2018-12-05 2020-11-03 敬业钢铁有限公司 Hydrogen and oxygen control process for RH furnace refining
CN111270036A (en) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 System and process method for producing sponge iron by direct reduction of hydrogen energy

Similar Documents

Publication Publication Date Title
BRPI0707605A2 (en) molten steel nitrogen removal method
CN109402328B (en) Method for controlling carbon element content of duplex stainless steel smelted by refining furnace
CA2399936A1 (en) Method of producing high nitrogen ultra low carbon steel
JPWO2022249798A5 (en)
JP5272479B2 (en) Method for desulfurizing and refining molten iron
JP2005232536A (en) Method for smelting high cleanliness steel
JPS60234916A (en) Manufacture of stainless steel containing low nitrogen
JPH09165615A (en) Denitrifying method for molten metal
KR20130074925A (en) Refining method for stainless steel
CN114032357A (en) Smelting method for accurately controlling nitrogen content in steel
CN111020141A (en) Atmosphere-controllable heat treatment processing technology
JP7480751B2 (en) METHOD FOR DENITRATION OF MOLTEN STEEL AND METHOD FOR PRODUCING STEEL
CA2671074A1 (en) Method and device for producing pig-iron based stainless steel without using a supply of electrical energy
BR112023024464A2 (en) METHOD FOR REFINED CAST IRON
TWI824547B (en) Denitrification method of molten steel, simultaneous denitrification and desulfurization treatment method and steel manufacturing method
RU2023134446A (en) METHOD FOR REFINING MOLTEN CAST IRON
JPS5763620A (en) Denitriding and refining method for high chromium steel
CN116356119B (en) High-efficiency steelmaking nitrogen control method based on hydrogen-containing plasma blowing
US4436553A (en) Process to produce low hydrogen steel
JPS63190113A (en) Production of dead low carbon steel
SU443907A1 (en) The decarburization method of high alloy steel
JP3566770B2 (en) Manufacturing method of ultra-low carbon steel
JPH07268436A (en) Method for melting extralow nitrogen chromium-containing steel
JPH02225615A (en) Method for refining high-nitrogen and low-oxygen steel
JPH0586417A (en) Surface treatment for improving strength