JPS5550416A - Melting method for steel containing high phosphor by bottom-blown converter - Google Patents

Melting method for steel containing high phosphor by bottom-blown converter

Info

Publication number
JPS5550416A
JPS5550416A JP12450678A JP12450678A JPS5550416A JP S5550416 A JPS5550416 A JP S5550416A JP 12450678 A JP12450678 A JP 12450678A JP 12450678 A JP12450678 A JP 12450678A JP S5550416 A JPS5550416 A JP S5550416A
Authority
JP
Japan
Prior art keywords
steel
molten
slag
high phosphor
molten 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.)
Pending
Application number
JP12450678A
Other languages
Japanese (ja)
Inventor
Masaru Shibata
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 JP12450678A priority Critical patent/JPS5550416A/en
Publication of JPS5550416A publication Critical patent/JPS5550416A/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
    • C21C5/34—Blowing 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 simply manufacture high phosphor contained steel, by stirring molten steel blowing inactive gas from the tuyere of furnace bottom and reducing P2O5 in molten slag to P by adding reducing agent and then, returning P to the molten steel. CONSTITUTION:Steel is refined in the bottom-blown converter making pig iron containing about 0.1% of P as raw material. Oxygen blowing is stopped when aimed C content is obtained by decarbonizing reaction by oxygen blowing. During the above reaction, P is oxidized to P2O5 and P2O5 is moved in molten slag. Next, inactive gas, such as Ar etc., is blown from the tuyere of furnace bottom and molten steel and slag are stirred. At the same time, 1.5 times of chemically theoretical necessary quantity of reducing agent, such as Si etc., having larger affinity with oxygen than P, is added in the form of Fe-Si. P2O5 in the molten slag is reduced to P by Si and P is contained in the molten steel. High phosphor contained steel, such as weatherproof steel, free-cutting steel etc., is manufactured simply using cheap Fe-Si etc.
JP12450678A 1978-10-09 1978-10-09 Melting method for steel containing high phosphor by bottom-blown converter Pending JPS5550416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12450678A JPS5550416A (en) 1978-10-09 1978-10-09 Melting method for steel containing high phosphor by bottom-blown converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12450678A JPS5550416A (en) 1978-10-09 1978-10-09 Melting method for steel containing high phosphor by bottom-blown converter

Publications (1)

Publication Number Publication Date
JPS5550416A true JPS5550416A (en) 1980-04-12

Family

ID=14887165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12450678A Pending JPS5550416A (en) 1978-10-09 1978-10-09 Melting method for steel containing high phosphor by bottom-blown converter

Country Status (1)

Country Link
JP (1) JPS5550416A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104561436A (en) * 2014-12-12 2015-04-29 新疆八一钢铁股份有限公司 Process method for converter smelting of weathering resistant steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104561436A (en) * 2014-12-12 2015-04-29 新疆八一钢铁股份有限公司 Process method for converter smelting of weathering resistant steel

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