JPS5681610A - Treatment of molten iron - Google Patents

Treatment of molten iron

Info

Publication number
JPS5681610A
JPS5681610A JP15742779A JP15742779A JPS5681610A JP S5681610 A JPS5681610 A JP S5681610A JP 15742779 A JP15742779 A JP 15742779A JP 15742779 A JP15742779 A JP 15742779A JP S5681610 A JPS5681610 A JP S5681610A
Authority
JP
Japan
Prior art keywords
molten iron
slag
iron
decarburization
cao
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.)
Granted
Application number
JP15742779A
Other languages
Japanese (ja)
Other versions
JPS5835566B2 (en
Inventor
Kazumasa Umezawa
Norizo Futasugi
Ryoshi Arima
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 JP15742779A priority Critical patent/JPS5835566B2/en
Publication of JPS5681610A publication Critical patent/JPS5681610A/en
Publication of JPS5835566B2 publication Critical patent/JPS5835566B2/en
Expired 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 dephosphorize and desulfurize molten iron with a small amount of slug while suppressing the decarburization by charging a specific refining agent and iron oxide to the molten iron having been decreased of the content of silicon thereby maintaining the refined slag of a desirable state. CONSTITUTION:The refining agent comprising 0.2-0.5pt.wt. CaCl2 and/or KCl based on 1pt.wt. CaO is charged to molten iron of 0.003-0.25% Si, and iron oxide is charged dividedly, thence the molten iron is strongly stirred to maintain the basicity (CaO/SiO2) of the refined slag at 3.5-8.0 and 5%>T.Fe amount>=3%. Then, the slag is formed stably, and the molten iron is quickly dephosphorized and desulfurized while its decarburization is suppressed.
JP15742779A 1979-12-06 1979-12-06 How to process hot metal Expired JPS5835566B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15742779A JPS5835566B2 (en) 1979-12-06 1979-12-06 How to process hot metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15742779A JPS5835566B2 (en) 1979-12-06 1979-12-06 How to process hot metal

Publications (2)

Publication Number Publication Date
JPS5681610A true JPS5681610A (en) 1981-07-03
JPS5835566B2 JPS5835566B2 (en) 1983-08-03

Family

ID=15649391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15742779A Expired JPS5835566B2 (en) 1979-12-06 1979-12-06 How to process hot metal

Country Status (1)

Country Link
JP (1) JPS5835566B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009191300A (en) * 2008-02-13 2009-08-27 Jfe Steel Corp Method for desulfurizing molten pig iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195764U (en) * 1982-06-23 1983-12-26 高橋金物株式会社 hinge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009191300A (en) * 2008-02-13 2009-08-27 Jfe Steel Corp Method for desulfurizing molten pig iron

Also Published As

Publication number Publication date
JPS5835566B2 (en) 1983-08-03

Similar Documents

Publication Publication Date Title
US4054445A (en) Deoxidizing and desulphurizing steel
JPS5681610A (en) Treatment of molten iron
GB1406608A (en) Lime composition
ES471835A1 (en) A method of manufacturing crude iron from sulphidic ironcontaining material
JPS5558310A (en) Treating method of molten iron
JPS6241308B2 (en)
JPS5629611A (en) Simultaneous dephosphorizing desulfurization of blast furnace molten pig iron
JPS56130416A (en) Steel making method
JPS5541933A (en) Dephosphorization and desiliconization method of hot metal
JPS5623212A (en) Dephosphorizing and desulfurizing method of low silicon molten iron
GB1251929A (en)
JPS54121216A (en) Desulfurization of molten iron
JPS538310A (en) Reusing method of steel making slag
ES8402879A1 (en) Process for increasing the batches of coolants during the refining of steel by the BOF process.
Kucher et al. The Effects of Magnesium Oxide on the Thermodynamics of Combined Reduction of Manganese and Silicon by Carbon
GB933393A (en) Calcium-silicon-iron alloys having a high calcium content, and the manufacture thereof
JPS5481113A (en) Process for desulfurizing molten iron outside furnace
JPS563610A (en) Molten iron pretreating method
Yamagata et al. Desiliconization Reaction of Pig Iron With FeO Containing Slag.(Synopsis)
JPS648216A (en) Production of high ti steel
GB930570A (en) Improvements in and relating to the production of low phosphorous ferromanganese
JPS541221A (en) Method of dephosphorizing molten iron
JPS5534604A (en) Hot iron treating method
Hayashi et al. The Equilibrium Between Liquid Slag and Liquid Iron in the Fe--Mn--O--S System
JPS55128519A (en) Enhancing of steel tapping yield