JPS5792119A - Method for refining of molten iron - Google Patents

Method for refining of molten iron

Info

Publication number
JPS5792119A
JPS5792119A JP16671880A JP16671880A JPS5792119A JP S5792119 A JPS5792119 A JP S5792119A JP 16671880 A JP16671880 A JP 16671880A JP 16671880 A JP16671880 A JP 16671880A JP S5792119 A JPS5792119 A JP S5792119A
Authority
JP
Japan
Prior art keywords
molten iron
ladle
iron
oxide
dephosphorizing
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
JP16671880A
Other languages
Japanese (ja)
Inventor
Hiromi Nakamura
Shinji Kuriyama
Kenzo Yamada
Hidehiko Ogura
Genji Nakatani
Ryuichi Nakajima
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP16671880A priority Critical patent/JPS5792119A/en
Publication of JPS5792119A publication Critical patent/JPS5792119A/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
    • C21C5/285—Plants therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Botany (AREA)
  • Manufacturing & Machinery (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)

Abstract

PURPOSE:To refine molten iron efficiently by adding soda ash and iron oxide to the molten iron in a ladle after desiliconization by adding iron oxide to the molten iron, through a nozzle immersed at its leading end into said molten iron, thereby dephosphorizing and desiliconizing the molten iron then decarburizing and refining the same in a pure oxygen top blown furnace. CONSTITUTION:In a flow passage 14 for molten iron for containing the molten iron tapped from a blast furnace 11 into a ladle 12, solid oxide is added from a chute 15 to the molten iron or gaseous oxide from a nozzle 16, and further solid oxide is added from a chute 17 into the molten iron dropping into the ladle 12, whereby the molten iron is desiliconized. Next, the ladle 12 of contg. the molten iron 10 after the desiliconization is transferred up to the installation position of a slag removing device by means of a carriage 13, and the slag 9 floating on the melt surface in the ladle 12 is removed, after which the ladle is moved up to the position where a dephosphorizing device is installed. In the installation position of the dephosphorizing device, soda ash, iron oxide, carrier gas and gaseous O2 are blown respectively thrugh lances 20 and 21, 21 into the molten iron in the ladle 12, whereby the molten iron is dephosphorized.
JP16671880A 1980-11-28 1980-11-28 Method for refining of molten iron Pending JPS5792119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16671880A JPS5792119A (en) 1980-11-28 1980-11-28 Method for refining of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16671880A JPS5792119A (en) 1980-11-28 1980-11-28 Method for refining of molten iron

Publications (1)

Publication Number Publication Date
JPS5792119A true JPS5792119A (en) 1982-06-08

Family

ID=15836462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16671880A Pending JPS5792119A (en) 1980-11-28 1980-11-28 Method for refining of molten iron

Country Status (1)

Country Link
JP (1) JPS5792119A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152312A (en) * 1984-08-17 1986-03-15 Kawasaki Steel Corp Continuous desiliconizing method of molten iron
JP2008081796A (en) * 2006-09-28 2008-04-10 Jfe Steel Kk METHOD FOR RECOVERING METAL FROM CaO-BASED DESULPHURIZED-SLAG
WO2017104538A1 (en) * 2015-12-17 2017-06-22 新日鉄住金エンジニアリング株式会社 Molten pig iron processing method and apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152312A (en) * 1984-08-17 1986-03-15 Kawasaki Steel Corp Continuous desiliconizing method of molten iron
JP2008081796A (en) * 2006-09-28 2008-04-10 Jfe Steel Kk METHOD FOR RECOVERING METAL FROM CaO-BASED DESULPHURIZED-SLAG
WO2017104538A1 (en) * 2015-12-17 2017-06-22 新日鉄住金エンジニアリング株式会社 Molten pig iron processing method and apparatus
KR20170102985A (en) * 2015-12-17 2017-09-12 신닛떼쯔 수미킨 엔지니어링 가부시끼가이샤 Charcoal treatment method and apparatus
CN107406897A (en) * 2015-12-17 2017-11-28 新日铁住金工程技术株式会社 iron liquid processing method and device
CN107406897B (en) * 2015-12-17 2019-06-25 新日铁住金工程技术株式会社 Iron liquid processing method and device

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