EP3954787A4 - Highly efficient molten iron alloy refining method - Google Patents

Highly efficient molten iron alloy refining method Download PDF

Info

Publication number
EP3954787A4
EP3954787A4 EP19924226.4A EP19924226A EP3954787A4 EP 3954787 A4 EP3954787 A4 EP 3954787A4 EP 19924226 A EP19924226 A EP 19924226A EP 3954787 A4 EP3954787 A4 EP 3954787A4
Authority
EP
European Patent Office
Prior art keywords
molten iron
highly efficient
iron alloy
refining method
alloy refining
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.)
Pending
Application number
EP19924226.4A
Other languages
German (de)
French (fr)
Other versions
EP3954787A1 (en
Inventor
Naoto Sasaki
Michitaka Matsuo
Kenichiro Naito
Sohichi Niino
Koji Morita
Takehiko Toh
Masamitsu Wakoh
Kazuo Onuki
Hiroshi Hirata
S. I. Semykin
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
Z I Nekrasov Iron & Steel Institute Of National Academy Of Sciences Of Ukraine
Original Assignee
Nippon Steel Corp
Z I Nekrasov Iron & Steel Institute Of National Academy Of Sciences Of Ukraine
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, Z I Nekrasov Iron & Steel Institute Of National Academy Of Sciences Of Ukraine filed Critical Nippon Steel Corp
Publication of EP3954787A1 publication Critical patent/EP3954787A1/en
Publication of EP3954787A4 publication Critical patent/EP3954787A4/en
Pending 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
    • C21C5/36—Processes yielding slags of special composition
    • 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
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] electric arc furnace
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5264—Manufacture of alloyed steels including ferro-alloys
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—Processes yielding slags of special composition
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • 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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • C21C2250/06—Hollow electrode
    • 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
    • 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
    • C21C5/48—Bottoms or tuyéres of converters
EP19924226.4A 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method Pending EP3954787A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/015737 WO2020208768A1 (en) 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method

Publications (2)

Publication Number Publication Date
EP3954787A1 EP3954787A1 (en) 2022-02-16
EP3954787A4 true EP3954787A4 (en) 2022-11-30

Family

ID=72751161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19924226.4A Pending EP3954787A4 (en) 2019-04-11 2019-04-11 Highly efficient molten iron alloy refining method

Country Status (6)

Country Link
EP (1) EP3954787A4 (en)
JP (1) JP7158570B2 (en)
KR (1) KR102483106B1 (en)
CN (1) CN113631729B (en)
UA (1) UA128009C2 (en)
WO (1) WO2020208768A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH073323A (en) * 1993-06-21 1995-01-06 Voest Alpine Ind Anlagen Gmbh Converter for steel production
JPH09227918A (en) * 1996-02-20 1997-09-02 Nippon Steel Corp Method for smelting stainless steel
CA3046587A1 (en) * 2016-12-16 2018-06-21 Nippon Steel Corporation Electric furnace

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117409Y2 (en) * 1978-12-27 1986-05-28
JPH0791574B2 (en) * 1992-09-29 1995-10-04 川崎重工業株式会社 Raw material charging method and apparatus for melting and refining furnace
JP3717625B2 (en) * 1997-02-05 2005-11-16 日新製鋼株式会社 Electric arc furnace slag reduction method
JP3332010B2 (en) * 1998-06-18 2002-10-07 日本鋼管株式会社 Manufacturing method of low phosphorus hot metal
JP2002371311A (en) * 2001-04-13 2002-12-26 Osaka Koukai Kk Method for dephosphorizing molten metal, dephosphorizing agent with low-temperature slag forming property therefor, and manufacturing method therefor
JP4388482B2 (en) 2005-01-18 2009-12-24 新日本製鐵株式会社 Slag processing method
CN101165196B (en) * 2006-10-19 2010-12-08 中国恩菲工程技术有限公司 Technique for continuously smelting copper by employing oxygen bottom converter and device thereof
JP2008266669A (en) * 2007-04-16 2008-11-06 Jfe Steel Kk Method and instrument for measuring molten material level in shaft-furnace
BR112013020045B1 (en) * 2011-02-10 2018-07-24 Nippon Steel & Sumitomo Metal Corp desalination and dephosphorization method of cast iron
JP5720497B2 (en) * 2011-08-25 2015-05-20 Ｊｆｅスチール株式会社 Method for recovering iron and phosphorus from steelmaking slag
CN103408013B (en) * 2013-08-03 2015-06-24 石家庄新华能源环保科技股份有限公司 Calcium carbide furnace with combination of oxygen heating method and electric heating method
JP6164151B2 (en) * 2014-05-14 2017-07-19 Ｊｆｅスチール株式会社 Method for refining molten iron using a converter-type refining furnace
JP6413710B2 (en) * 2014-12-02 2018-10-31 新日鐵住金株式会社 Production method of high purity steel by DC arc electric furnace
CN109097651B (en) * 2018-08-09 2019-06-28 徐州宏阳新材料科技有限公司 A kind of low-phosphorous high carbon ferro-chrome and its smelting process
CN109097522B (en) * 2018-09-30 2020-04-10 武钢集团昆明钢铁股份有限公司 Converter smelting method for molten steel residual manganese at medium-high manganese, high phosphorus and low silicon iron water extraction and improvement end point

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH073323A (en) * 1993-06-21 1995-01-06 Voest Alpine Ind Anlagen Gmbh Converter for steel production
JPH09227918A (en) * 1996-02-20 1997-09-02 Nippon Steel Corp Method for smelting stainless steel
CA3046587A1 (en) * 2016-12-16 2018-06-21 Nippon Steel Corporation Electric furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2020208768A1 *

Also Published As

Publication number Publication date
WO2020208768A1 (en) 2020-10-15
JP7158570B2 (en) 2022-10-21
KR102483106B1 (en) 2023-01-02
EP3954787A1 (en) 2022-02-16
CN113631729B (en) 2022-09-20
CN113631729A (en) 2021-11-09
JPWO2020208768A1 (en) 2020-10-15
KR20210127986A (en) 2021-10-25
UA128009C2 (en) 2024-03-06

Similar Documents

Publication Publication Date Title
EP3611277A4 (en) Method for producing metal ingot
EP3932586A4 (en) Method for continuous steel casting
EP3992321A4 (en) Free-cutting copper alloy casting, and method for producing free-cutting copper alloy casting
EP3421620A4 (en) Method for refining molten steel in vacuum degassing equipment
EP3730632A4 (en) Method for oxygen transmission smelting of molten iron, and top-blow lance
EP3719146A4 (en) Method for recovering iron from zinc sulfate solution
EP3480325A4 (en) Smelting method for metallurgical electric-furnace
EP3638438A4 (en) Die casting furnace system with ultrasonic unit for improved molten metal quality
EP3957756A4 (en) Method for producing chromium-containing molten iron
EP3908683A4 (en) Iron based alloy
EP3792273A4 (en) Refining method for vasopressin
EP3971306A4 (en) Method for adding ca to molten steel
RS64851B1 (en) Improved copper smelting process
EP3964597A4 (en) Aluminium-based alloy
EP3382048B8 (en) Thixoforming method for titanium-cobalt alloy
EP3954787A4 (en) Highly efficient molten iron alloy refining method
EP4032990A4 (en) Method for producing molten steel
EP4029954A4 (en) Method for producing molten iron with electric furnace
EP3572163A4 (en) Steel continuous casting method
EP4038211A4 (en) Copper alloys
EP3910085A4 (en) Copper alloy material
EP3760339A4 (en) Continuous steel casting method
EP4006176A4 (en) Molten iron dephosphorization method
EP3604569A4 (en) Method for smelting metal oxide ore
EP4056722A4 (en) Method for producing molten iron using electric furnace

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211014

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: SEMYKIN, S. I.

Inventor name: HIRATA, HIROSHI

Inventor name: ONUKI, KAZUO

Inventor name: WAKOH, MASAMITSU

Inventor name: TOH, TAKEHIKO

Inventor name: MORITA, KOJI

Inventor name: NIINO, SOHICHI

Inventor name: NAITO, KENICHIRO

Inventor name: MATSUO, MICHITAKA

Inventor name: SASAKI,NAOTO

A4 Supplementary search report drawn up and despatched

Effective date: 20221027

RIC1 Information provided on ipc code assigned before grant

Ipc: C21C 5/48 20060101ALN20221021BHEP

Ipc: C21C 5/54 20060101ALI20221021BHEP

Ipc: C21C 5/52 20060101ALI20221021BHEP

Ipc: C21C 5/32 20060101ALI20221021BHEP

Ipc: C21C 5/46 20060101ALI20221021BHEP

Ipc: C21C 5/36 20060101AFI20221021BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230519

RIC1 Information provided on ipc code assigned before grant

Ipc: C21C 5/48 20060101ALN20240122BHEP

Ipc: C21C 5/54 20060101ALI20240122BHEP

Ipc: C21C 5/52 20060101ALI20240122BHEP

Ipc: C21C 5/32 20060101ALI20240122BHEP

Ipc: C21C 5/46 20060101ALI20240122BHEP

Ipc: C21C 5/36 20060101AFI20240122BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: C21C 5/48 20060101ALN20240207BHEP

Ipc: C21C 5/54 20060101ALI20240207BHEP

Ipc: C21C 5/52 20060101ALI20240207BHEP

Ipc: C21C 5/32 20060101ALI20240207BHEP

Ipc: C21C 5/46 20060101ALI20240207BHEP

Ipc: C21C 5/36 20060101AFI20240207BHEP

INTG Intention to grant announced

Effective date: 20240311