JPS5773107A - Method foe improving dephosphorization efficiency of molten iron - Google Patents

Method foe improving dephosphorization efficiency of molten iron

Info

Publication number
JPS5773107A
JPS5773107A JP15035080A JP15035080A JPS5773107A JP S5773107 A JPS5773107 A JP S5773107A JP 15035080 A JP15035080 A JP 15035080A JP 15035080 A JP15035080 A JP 15035080A JP S5773107 A JPS5773107 A JP S5773107A
Authority
JP
Japan
Prior art keywords
molten iron
na2co3
oxidizing agent
dephosphorization efficiency
iron
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
JP15035080A
Other languages
Japanese (ja)
Inventor
Kazuo Ogahira
Arata Tanaka
Masazumi Hirai
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP15035080A priority Critical patent/JPS5773107A/en
Publication of JPS5773107A publication Critical patent/JPS5773107A/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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising

Abstract

PURPOSE:To improve dephosphorization efficiency by increasing or decreasing an oxidizing agent according to the content of Si in molten iron and controlling the ratio of an Na2CO3-contg. flux and a gas for conveying in dephosphorizing P in the molten iron with Na2CO3. CONSTITUTION:According to the content of Si of molten iron 2 in a reaction vessel 1 of a ladle or the like, a 5-50kg oxidizing agent is beforehand added in terms of iron ore per ton of molten iron. The Si in the molten iron is oxidized and slagged off by this oxidizing agent to form slag 3, after which Na2CO3 is blown through a lance 5 into the molten iron 2 at 15-40 solid-air ratios with gaseous nitrogen 7 as a gas for conveying. Since the Si in the molten iron is beforehand removed, the rate of reaction of P with Na2CO3 is increased and the molten iron is dephosphorized at a high dephosphorization rate.
JP15035080A 1980-10-27 1980-10-27 Method foe improving dephosphorization efficiency of molten iron Pending JPS5773107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15035080A JPS5773107A (en) 1980-10-27 1980-10-27 Method foe improving dephosphorization efficiency of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15035080A JPS5773107A (en) 1980-10-27 1980-10-27 Method foe improving dephosphorization efficiency of molten iron

Publications (1)

Publication Number Publication Date
JPS5773107A true JPS5773107A (en) 1982-05-07

Family

ID=15495064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15035080A Pending JPS5773107A (en) 1980-10-27 1980-10-27 Method foe improving dephosphorization efficiency of molten iron

Country Status (1)

Country Link
JP (1) JPS5773107A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5947317A (en) * 1982-09-08 1984-03-17 Nippon Steel Corp Method for dephosphorizing molten iron by blowing slag forming agent into molten iron bath
US10077482B2 (en) * 2013-08-07 2018-09-18 Posco Molten iron refining method and device thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5947317A (en) * 1982-09-08 1984-03-17 Nippon Steel Corp Method for dephosphorizing molten iron by blowing slag forming agent into molten iron bath
US10077482B2 (en) * 2013-08-07 2018-09-18 Posco Molten iron refining method and device thereof

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