JPS5687614A - Stable desiliconization operating method - Google Patents

Stable desiliconization operating method

Info

Publication number
JPS5687614A
JPS5687614A JP16255279A JP16255279A JPS5687614A JP S5687614 A JPS5687614 A JP S5687614A JP 16255279 A JP16255279 A JP 16255279A JP 16255279 A JP16255279 A JP 16255279A JP S5687614 A JPS5687614 A JP S5687614A
Authority
JP
Japan
Prior art keywords
desiliconization
gas
supplied
slag
stable
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
JP16255279A
Other languages
Japanese (ja)
Other versions
JPS6142762B2 (en
Inventor
Yukiyoshi Ito
Hideo Ito
Yuji Kawachi
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 JP16255279A priority Critical patent/JPS5687614A/en
Publication of JPS5687614A publication Critical patent/JPS5687614A/en
Publication of JPS6142762B2 publication Critical patent/JPS6142762B2/ja
Granted 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur

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)

Abstract

PURPOSE:To suppress slag foaming during treatment by blowing an oxidizing gas into the desiliconization slag formed in desiliconization of molten iron. CONSTITUTION:In beforehand carrying out the desiliconization only of molten iron through pretreatment, an oxidizing gas such as oxgen gas or air is supplied into slag, whereby CO is converted to CO2 before it reacts with FeO so that the formation of a small amount of CO2 gas is prevented and foaming forming phenomenon is eliminated. Reaction efficiency is higher as the gas to be supplied is supplied to the entire part of the slag layer. The oxygen content of the gas to be supplied is in an about 0.5-10Nm<3>/t-pig range and a method of directly blowing the same into slat is best. Thereby, the stable desiliconization operation may be accomplished.
JP16255279A 1979-12-14 1979-12-14 Stable desiliconization operating method Granted JPS5687614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16255279A JPS5687614A (en) 1979-12-14 1979-12-14 Stable desiliconization operating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16255279A JPS5687614A (en) 1979-12-14 1979-12-14 Stable desiliconization operating method

Publications (2)

Publication Number Publication Date
JPS5687614A true JPS5687614A (en) 1981-07-16
JPS6142762B2 JPS6142762B2 (en) 1986-09-24

Family

ID=15756753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16255279A Granted JPS5687614A (en) 1979-12-14 1979-12-14 Stable desiliconization operating method

Country Status (1)

Country Link
JP (1) JPS5687614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021134386A (en) * 2020-02-27 2021-09-13 日本製鉄株式会社 Method for melting cold iron source with slag reduction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021134386A (en) * 2020-02-27 2021-09-13 日本製鉄株式会社 Method for melting cold iron source with slag reduction

Also Published As

Publication number Publication date
JPS6142762B2 (en) 1986-09-24

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