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JPS54121216A - Desulfurization of molten iron - Google Patents

Desulfurization of molten iron

Info

Publication number
JPS54121216A
JPS54121216A JP2968078A JP2968078A JPS54121216A JP S54121216 A JPS54121216 A JP S54121216A JP 2968078 A JP2968078 A JP 2968078A JP 2968078 A JP2968078 A JP 2968078A JP S54121216 A JPS54121216 A JP S54121216A
Authority
JP
Japan
Prior art keywords
molten iron
iron
desulfurizing
carbon
skimmer
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
JP2968078A
Other languages
Japanese (ja)
Other versions
JPS5643363B2 (en
Inventor
Atsushi Kondo
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP2968078A priority Critical patent/JPS54121216A/en
Publication of JPS54121216A publication Critical patent/JPS54121216A/en
Publication of JPS5643363B2 publication Critical patent/JPS5643363B2/ja
Granted 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
    • C21C1/025—Agents used for 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:Desulfurizing material consisting of converter slag and carbon material is added between the tap hole of the blast furnace and skimmer thereby effecting low cost predesulfurizing of molten iron. CONSTITUTION:A highly basic converter slag powder with basicity of more than 3.5 containing as much as 30 to 50% of Cao is used in amount of 50 to 60% to be mixed with 40 to 50% of powder of carbon materials such as coke and coal to form a desulfurizing agent. When molten iron is tapped from the blast furnace, such desulferizing mixture is added to the iron flow between the tap hole and skimmer, in an amount of 15 to 20 kg per 1 ton of molten iron. FeS in the iron is reacted with CaO in the desulfurizing agent, becoming CaS and removed from the molten iron to be formed into slag, FeO formed in this process is reduced by carbon into Fe, which is melted in molten iron. Accordingly, dusulfurizing reaction equilibrium by FeO increase is unbalanced thereby to cause the desulfurizing reaction to continue. The raw mterial is cheap and has no danger of hazard.
JP2968078A 1978-03-14 1978-03-14 Desulfurization of molten iron Granted JPS54121216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2968078A JPS54121216A (en) 1978-03-14 1978-03-14 Desulfurization of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2968078A JPS54121216A (en) 1978-03-14 1978-03-14 Desulfurization of molten iron

Publications (2)

Publication Number Publication Date
JPS54121216A true JPS54121216A (en) 1979-09-20
JPS5643363B2 JPS5643363B2 (en) 1981-10-12

Family

ID=12282820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2968078A Granted JPS54121216A (en) 1978-03-14 1978-03-14 Desulfurization of molten iron

Country Status (1)

Country Link
JP (1) JPS54121216A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849366A1 (en) * 1996-12-18 1998-06-24 MANNESMANN Aktiengesellschaft Process for desulfuration of pig iron
KR20010104526A (en) * 2000-05-15 2001-11-26 이구택 Process for desulfurizing desiliconized molten iron by using ladle slag
KR100775240B1 (en) * 2001-06-15 2007-11-12 주식회사 포스코 Hot metal pretreatment for improving desulfurizing efficiency
KR100878674B1 (en) * 2002-10-10 2009-01-13 주식회사 포스코 Method for Pre-Treating Pig Iron

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849366A1 (en) * 1996-12-18 1998-06-24 MANNESMANN Aktiengesellschaft Process for desulfuration of pig iron
KR20010104526A (en) * 2000-05-15 2001-11-26 이구택 Process for desulfurizing desiliconized molten iron by using ladle slag
KR100775240B1 (en) * 2001-06-15 2007-11-12 주식회사 포스코 Hot metal pretreatment for improving desulfurizing efficiency
KR100878674B1 (en) * 2002-10-10 2009-01-13 주식회사 포스코 Method for Pre-Treating Pig Iron

Also Published As

Publication number Publication date
JPS5643363B2 (en) 1981-10-12

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