JPS55128521A - Converter operating method - Google Patents

Converter operating method

Info

Publication number
JPS55128521A
JPS55128521A JP3463979A JP3463979A JPS55128521A JP S55128521 A JPS55128521 A JP S55128521A JP 3463979 A JP3463979 A JP 3463979A JP 3463979 A JP3463979 A JP 3463979A JP S55128521 A JPS55128521 A JP S55128521A
Authority
JP
Japan
Prior art keywords
converter
oxygen
amount
calculated
slag
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
JP3463979A
Other languages
Japanese (ja)
Other versions
JPS5858406B2 (en
Inventor
Hajime Nashiwa
Takeshi Katogi
Takashi Kuribayashi
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3463979A priority Critical patent/JPS5858406B2/en
Publication of JPS55128521A publication Critical patent/JPS55128521A/en
Publication of JPS5858406B2 publication Critical patent/JPS5858406B2/en
Expired 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To control the dephosphorization reaction to an objective value by the slag forming ratio, by a method wherein, in a top-blow oxygen converter, the FeO amount formed within a molten slag is calculated from the difference of O2 amount used to oxidize C, Si, and Mn and O2 amount blown into a furnace to decide the slag forming ratio of a molten slag. CONSTITUTION:After the blowing of a top-blow oxyben converter is initiated, an exhaust gas from the converter is continuously analysed and an oxygen amount required in desiliconization and demanganization is respectively calculated from an oxygen amount required in decarburization and amounts of Si and Mn charged into a converter until desiliconization is completed. From the difference of a sum of these oxygen amounts and an oxygen amount blown into the converter actually until desiliconization is completed, an amount of formed FeO is calculated as a FeO content within a molten slag. The final slag-forming ratio is decided from this FeO content as wel as the final dephosphorization ratio being in strong mutual relation therewith is calculated and the degree of the oxygen blowing refining is controlled according to these values and an objective steel containing C and P is produced.
JP3463979A 1979-03-24 1979-03-24 How to operate a converter Expired JPS5858406B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3463979A JPS5858406B2 (en) 1979-03-24 1979-03-24 How to operate a converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3463979A JPS5858406B2 (en) 1979-03-24 1979-03-24 How to operate a converter

Publications (2)

Publication Number Publication Date
JPS55128521A true JPS55128521A (en) 1980-10-04
JPS5858406B2 JPS5858406B2 (en) 1983-12-24

Family

ID=12419982

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3463979A Expired JPS5858406B2 (en) 1979-03-24 1979-03-24 How to operate a converter

Country Status (1)

Country Link
JP (1) JPS5858406B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012062567A (en) * 2010-08-20 2012-03-29 Jfe Steel Corp Method decarburizing and refining molten iron in converter
JP2012067378A (en) * 2010-08-23 2012-04-05 Jfe Steel Corp Method for decarburization refining of molten pig iron in converter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125311U (en) * 1983-02-15 1984-08-23 株式会社資生堂 cosmetic compact container
JPS59125310U (en) * 1983-02-15 1984-08-23 株式会社資生堂 cosmetic compact container
JPS6123905U (en) * 1984-07-17 1986-02-13 カネボウ株式会社 compact case
JPS6254611U (en) * 1985-09-27 1987-04-04
JPS62192314U (en) * 1986-05-29 1987-12-07
JPH0540810Y2 (en) * 1987-07-06 1993-10-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012062567A (en) * 2010-08-20 2012-03-29 Jfe Steel Corp Method decarburizing and refining molten iron in converter
JP2012067378A (en) * 2010-08-23 2012-04-05 Jfe Steel Corp Method for decarburization refining of molten pig iron in converter

Also Published As

Publication number Publication date
JPS5858406B2 (en) 1983-12-24

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