JPS5690919A - Steel making method - Google Patents

Steel making method

Info

Publication number
JPS5690919A
JPS5690919A JP17013479A JP17013479A JPS5690919A JP S5690919 A JPS5690919 A JP S5690919A JP 17013479 A JP17013479 A JP 17013479A JP 17013479 A JP17013479 A JP 17013479A JP S5690919 A JPS5690919 A JP S5690919A
Authority
JP
Japan
Prior art keywords
oxygen blowing
under stirring
molten iron
converter
steel
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
JP17013479A
Other languages
Japanese (ja)
Other versions
JPS5922766B2 (en
Inventor
Tsutomu Kajimoto
Kiyoto Ushijima
Yujo Marukawa
Takae Kobayashi
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 JP54170134A priority Critical patent/JPS5922766B2/en
Publication of JPS5690919A publication Critical patent/JPS5690919A/en
Publication of JPS5922766B2 publication Critical patent/JPS5922766B2/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To make possible continuous casting of molten steel by adding a scorification agent to molten iron, performing oxygen blowing, and performing deoxidation by the addition of Al after refining under stirring thereby regulating O, Al and Si contents. CONSTITUTION:The molten iron which has been subjected to preliminary treatment such as dephosphorization according to need is charged into a converter into which gas can be introduced from below the bath surface. Oxygen blowing is performed by adding <=20kg scorification agent for 1 ton of this molten iron. At a suitable time during oxygen blowing and after oxygen blowing, an inert gas is introduced from below the bath surface, whereby the refining under stirring is accomplished. After the refining under stirring, the steel is tapped from the converter into a ladle while the inclusion of converter slag is being suppressed. During and/or after the tapping, Al is added and deoxidation is carried out, whereby free oxygen is regulated to <=70ppm, total Al to <=0.020%, and Si to an unavoidable contant. Thereby, continuous casting is made possible and obtaining of an ingot corresponding to a rimmed steel free from any defect such as pinholes at high yields and high efficiency is made possible.
JP54170134A 1979-12-25 1979-12-25 Steel manufacturing method Expired JPS5922766B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54170134A JPS5922766B2 (en) 1979-12-25 1979-12-25 Steel manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54170134A JPS5922766B2 (en) 1979-12-25 1979-12-25 Steel manufacturing method

Publications (2)

Publication Number Publication Date
JPS5690919A true JPS5690919A (en) 1981-07-23
JPS5922766B2 JPS5922766B2 (en) 1984-05-29

Family

ID=15899282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54170134A Expired JPS5922766B2 (en) 1979-12-25 1979-12-25 Steel manufacturing method

Country Status (1)

Country Link
JP (1) JPS5922766B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834124A (en) * 1981-08-25 1983-02-28 Kawasaki Steel Corp Controlling method for content of nitrogen in killed steel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1284155A (en) * 1917-06-13 1918-11-05 Henry F Shartzer Electric gun.
JPS5425209A (en) * 1977-07-27 1979-02-26 Sumitomo Metal Ind Ltd Method of producing super low carbon steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1284155A (en) * 1917-06-13 1918-11-05 Henry F Shartzer Electric gun.
JPS5425209A (en) * 1977-07-27 1979-02-26 Sumitomo Metal Ind Ltd Method of producing super low carbon steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834124A (en) * 1981-08-25 1983-02-28 Kawasaki Steel Corp Controlling method for content of nitrogen in killed steel

Also Published As

Publication number Publication date
JPS5922766B2 (en) 1984-05-29

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