JPS57188609A - Upward and downward blowing method - Google Patents

Upward and downward blowing method

Info

Publication number
JPS57188609A
JPS57188609A JP7279081A JP7279081A JPS57188609A JP S57188609 A JPS57188609 A JP S57188609A JP 7279081 A JP7279081 A JP 7279081A JP 7279081 A JP7279081 A JP 7279081A JP S57188609 A JPS57188609 A JP S57188609A
Authority
JP
Japan
Prior art keywords
lance
swiveling
steel
blowing
stirring gas
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
JP7279081A
Other languages
Japanese (ja)
Inventor
Akiya Ozeki
Teruyuki Hasegawa
Youichi Nimura
Kenzo Yamada
Tsutomu Usui
Kounoshin Tamura
Toshio Edane
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 JP7279081A priority Critical patent/JPS57188609A/en
Publication of JPS57188609A publication Critical patent/JPS57188609A/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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath

Landscapes

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

Abstract

PURPOSE:To produce not only low carbon steel, but also high carbon steel efficiently by accelerating slag making properties by blowing oxygen from above a steel bath by a swiveling lance, and stirring gas from below the steel bath. CONSTITUTION:A lance 2 swiveling as shown by an arrow blows oxygen 6 from above molten steel 4. At the same time, stirring gas is blown into the molten bath from tuy ere 3. In a swiveling lance method for upward blowing, when the rotational frequency of the lance 2 is regulated to >=15r.p.m., a decrease in decarbonization reation efficiency is great, but using the blowing of the stirring gas from the tuy ere 3 in combination eliminates the influence of the rotational frequency of the lance 2 upon decarbonization. For this purpose, the lance is rotated as fast as possible effectively for the production of slag and dephosphorization.
JP7279081A 1981-05-14 1981-05-14 Upward and downward blowing method Pending JPS57188609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7279081A JPS57188609A (en) 1981-05-14 1981-05-14 Upward and downward blowing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7279081A JPS57188609A (en) 1981-05-14 1981-05-14 Upward and downward blowing method

Publications (1)

Publication Number Publication Date
JPS57188609A true JPS57188609A (en) 1982-11-19

Family

ID=13499531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7279081A Pending JPS57188609A (en) 1981-05-14 1981-05-14 Upward and downward blowing method

Country Status (1)

Country Link
JP (1) JPS57188609A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54118317A (en) * 1978-03-07 1979-09-13 Nippon Kokan Kk <Nkk> Preparation of low carbon steel
JPS54160509A (en) * 1978-06-10 1979-12-19 Nippon Kokan Kk <Nkk> Cupelling of oxygen furnace

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54118317A (en) * 1978-03-07 1979-09-13 Nippon Kokan Kk <Nkk> Preparation of low carbon steel
JPS54160509A (en) * 1978-06-10 1979-12-19 Nippon Kokan Kk <Nkk> Cupelling of oxygen furnace

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