JPS55161016A - Refining method for bottom blowing converter - Google Patents

Refining method for bottom blowing converter

Info

Publication number
JPS55161016A
JPS55161016A JP6938779A JP6938779A JPS55161016A JP S55161016 A JPS55161016 A JP S55161016A JP 6938779 A JP6938779 A JP 6938779A JP 6938779 A JP6938779 A JP 6938779A JP S55161016 A JPS55161016 A JP S55161016A
Authority
JP
Japan
Prior art keywords
blowing
cao
sio2
produced
converter
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
JP6938779A
Other languages
Japanese (ja)
Inventor
Hajime Umada
Jun Nagai
Fumio Sudo
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 JP6938779A priority Critical patent/JPS55161016A/en
Publication of JPS55161016A publication Critical patent/JPS55161016A/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

Abstract

PURPOSE:To prevent the generation of spitting and fusion loss of lining brick of converter by blowing CaO having mol number of two times or more of SiO2 produced by the oxidation of Si that occurs in the early stage of oxygen blowing at the operation of bottom blown converter. CONSTITUTION:Powder of quicklime is blown an slagging agent together with oxygen gas from the tuyere of furnace bottom at the time of refining pig iron for steel by oxygen blowing in the bottom blowing converter. On this occasion, SiO2 is formed by the oxidation of Si at the early stage of blowing at first and blowing amount and speed of CaO are controlled so as to exist more CaO than forming dicalcium silicate of (CaO)2.SiO2 by produced slag always. Mol ratio of CaO:SiO2 in produced slag is made at 2:1 or more from the early stage of blowing and all produced SiO2 is changed to a stable (CaO)2SiO2. Accordingly, basic lining refractory material such as MgO etc. is not spoiled by free SiO2 by fusion or yield of molten steel is not lowered by spitting phenomena.
JP6938779A 1979-06-05 1979-06-05 Refining method for bottom blowing converter Pending JPS55161016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6938779A JPS55161016A (en) 1979-06-05 1979-06-05 Refining method for bottom blowing converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6938779A JPS55161016A (en) 1979-06-05 1979-06-05 Refining method for bottom blowing converter

Publications (1)

Publication Number Publication Date
JPS55161016A true JPS55161016A (en) 1980-12-15

Family

ID=13401122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6938779A Pending JPS55161016A (en) 1979-06-05 1979-06-05 Refining method for bottom blowing converter

Country Status (1)

Country Link
JP (1) JPS55161016A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002212617A (en) * 2001-01-11 2002-07-31 Nippon Steel Corp Method for desiliconizing molten iron
CN113042720A (en) * 2021-02-23 2021-06-29 首钢京唐钢铁联合有限责任公司 Molten iron inhibitor and preparation method and use method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53134715A (en) * 1971-12-07 1978-11-24 Maximilianshuette Eisenwerk Method of smelting lowwphosphrous pig iron into steel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53134715A (en) * 1971-12-07 1978-11-24 Maximilianshuette Eisenwerk Method of smelting lowwphosphrous pig iron into steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002212617A (en) * 2001-01-11 2002-07-31 Nippon Steel Corp Method for desiliconizing molten iron
CN113042720A (en) * 2021-02-23 2021-06-29 首钢京唐钢铁联合有限责任公司 Molten iron inhibitor and preparation method and use method thereof
CN113042720B (en) * 2021-02-23 2022-07-15 首钢京唐钢铁联合有限责任公司 Molten iron inhibitor and preparation method and using method thereof

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