JPS5732315A - Method for dephosphorization in basic oxygen converter steel making method - Google Patents

Method for dephosphorization in basic oxygen converter steel making method

Info

Publication number
JPS5732315A
JPS5732315A JP10797180A JP10797180A JPS5732315A JP S5732315 A JPS5732315 A JP S5732315A JP 10797180 A JP10797180 A JP 10797180A JP 10797180 A JP10797180 A JP 10797180A JP S5732315 A JPS5732315 A JP S5732315A
Authority
JP
Japan
Prior art keywords
concn
amount
molten steel
slag
dephosphorization
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
JP10797180A
Other languages
Japanese (ja)
Other versions
JPS6149363B2 (en
Inventor
Hiroshi Nomura
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 Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP10797180A priority Critical patent/JPS5732315A/en
Publication of JPS5732315A publication Critical patent/JPS5732315A/en
Publication of JPS6149363B2 publication Critical patent/JPS6149363B2/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
    • 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 stably dephosphorize molten steel to about the same extent as that by a double slag method without an increase in the amount of slag making materials for dephsophorization and a decrease in the yield of produced steel by simultaneously charging a large amount of iron oxide type materials such as iron ore and scale at the stage when the concn. of C in the molten steel attains a specific range. CONSTITUTION:At the stage when the concn. of C in molten steel attains 3.0- 1.5% in an oxygen blowing process of a basic converter, >=10kg/t steel iron oxide type materials are charged simultaneously. Here, the reason for determining the upper limit for the concn. of C lies in that it is the point where slag making progresses usually and before this, dephosphorization is solid reaction and no effect is obtained. On the other hand, if it is below the lower limit, C is insufficient and a sufficient amount of CO is not produced, thus failing to effect sufficient stirring between slag and metal and to provide dephsophorization acceleration effect. If the amount of simultaneous charging is below the lower limit, it is not possible to keep the final phosphorus concn. stably at about <=0.010.
JP10797180A 1980-08-06 1980-08-06 Method for dephosphorization in basic oxygen converter steel making method Granted JPS5732315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10797180A JPS5732315A (en) 1980-08-06 1980-08-06 Method for dephosphorization in basic oxygen converter steel making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10797180A JPS5732315A (en) 1980-08-06 1980-08-06 Method for dephosphorization in basic oxygen converter steel making method

Publications (2)

Publication Number Publication Date
JPS5732315A true JPS5732315A (en) 1982-02-22
JPS6149363B2 JPS6149363B2 (en) 1986-10-29

Family

ID=14472702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10797180A Granted JPS5732315A (en) 1980-08-06 1980-08-06 Method for dephosphorization in basic oxygen converter steel making method

Country Status (1)

Country Link
JP (1) JPS5732315A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62205209A (en) * 1986-03-04 1987-09-09 Nippon Kokan Kk <Nkk> Converter refining method
US4978766A (en) * 1987-02-17 1990-12-18 Ube Industries, Ltd. Process for producing 2-hydroxymethylene-3,3-dialkoxypropanenitrile alkali metal salt and process for obtaining alcoholic slurry of said compound from its synthetic reaction mixture
KR19980080961A (en) * 1997-04-17 1998-11-25 글렌제이모란 Basic oxygen steelmaking method with iron oxide pellet adduct

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62205209A (en) * 1986-03-04 1987-09-09 Nippon Kokan Kk <Nkk> Converter refining method
JPH0440409B2 (en) * 1986-03-04 1992-07-02 Nippon Kokan Kk
US4978766A (en) * 1987-02-17 1990-12-18 Ube Industries, Ltd. Process for producing 2-hydroxymethylene-3,3-dialkoxypropanenitrile alkali metal salt and process for obtaining alcoholic slurry of said compound from its synthetic reaction mixture
KR19980080961A (en) * 1997-04-17 1998-11-25 글렌제이모란 Basic oxygen steelmaking method with iron oxide pellet adduct

Also Published As

Publication number Publication date
JPS6149363B2 (en) 1986-10-29

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