JPS57104612A - Method for recovering gaseous co simultaneously with pretreatment of molten iron - Google Patents

Method for recovering gaseous co simultaneously with pretreatment of molten iron

Info

Publication number
JPS57104612A
JPS57104612A JP17806080A JP17806080A JPS57104612A JP S57104612 A JPS57104612 A JP S57104612A JP 17806080 A JP17806080 A JP 17806080A JP 17806080 A JP17806080 A JP 17806080A JP S57104612 A JPS57104612 A JP S57104612A
Authority
JP
Japan
Prior art keywords
gas
gaseous
molten iron
solid
carrier 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
JP17806080A
Other languages
Japanese (ja)
Inventor
Yozo Takemura
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 JP17806080A priority Critical patent/JPS57104612A/en
Publication of JPS57104612A publication Critical patent/JPS57104612A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To perform dephosphorization and desulfurization treatments simultaneously and to recover gaseous CO without combustion by specifying a solid- gas ratio at the stage of blowing carbonated dephosphorizing and desulfurizing agents into desiliconized molten iron by means of a carrier gas. CONSTITUTION:Carbonated materials, that is, CaCO3, Na2CO3 are blown as dephosphorizing and desulfurizing agents together with a flux into molten iron of <=0.20% content of Si. An inert gas is used as a carrier gas for blowing means, wherein a solid-gas ratio (powder to be blown kg/min/carier gas kg/min) is set at >=10.0. CO2, O2 are used other than N2 and Ar as the carrier gas. Here, if the solid-gas ratio is below 10.0, particularly abrupt production of gaseous CO occurs and the stable operation is infeasible. In this way, the waste gas of high content of the gaseous CO produced during the simultaneous dephosphorization and desulfurization is recovered positively with a recovering device provided in the upper part of a treatment vessel without allowing to contact with air.
JP17806080A 1980-12-18 1980-12-18 Method for recovering gaseous co simultaneously with pretreatment of molten iron Pending JPS57104612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17806080A JPS57104612A (en) 1980-12-18 1980-12-18 Method for recovering gaseous co simultaneously with pretreatment of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17806080A JPS57104612A (en) 1980-12-18 1980-12-18 Method for recovering gaseous co simultaneously with pretreatment of molten iron

Publications (1)

Publication Number Publication Date
JPS57104612A true JPS57104612A (en) 1982-06-29

Family

ID=16041899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17806080A Pending JPS57104612A (en) 1980-12-18 1980-12-18 Method for recovering gaseous co simultaneously with pretreatment of molten iron

Country Status (1)

Country Link
JP (1) JPS57104612A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013127089A (en) * 2011-12-17 2013-06-27 Jfe Steel Corp Method for pretreating molten iron

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127421A (en) * 1976-04-19 1977-10-26 Nisshin Steel Co Ltd Primary treatment of molten pig iron for converter process
JPS54103719A (en) * 1978-02-01 1979-08-15 Nisshin Steel Co Ltd Production of low phosphorous and sulfur steel by using conuerter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127421A (en) * 1976-04-19 1977-10-26 Nisshin Steel Co Ltd Primary treatment of molten pig iron for converter process
JPS54103719A (en) * 1978-02-01 1979-08-15 Nisshin Steel Co Ltd Production of low phosphorous and sulfur steel by using conuerter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013127089A (en) * 2011-12-17 2013-06-27 Jfe Steel Corp Method for pretreating molten iron

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