JPS55122815A - Off-furnace blowing desulfurization method to reduce iron content in slag - Google Patents

Off-furnace blowing desulfurization method to reduce iron content in slag

Info

Publication number
JPS55122815A
JPS55122815A JP2889079A JP2889079A JPS55122815A JP S55122815 A JPS55122815 A JP S55122815A JP 2889079 A JP2889079 A JP 2889079A JP 2889079 A JP2889079 A JP 2889079A JP S55122815 A JPS55122815 A JP S55122815A
Authority
JP
Japan
Prior art keywords
slag
desulfurizing agent
colemanite
cao
furnace
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
JP2889079A
Other languages
Japanese (ja)
Other versions
JPS5835565B2 (en
Inventor
Kunihiko Ishizaka
Tatsuyoshi Chino
Masaaki Tsukamoto
Hiraki Sonoda
Setsuo Tamura
Shigeki Furuya
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 SEKKAI KOGYOSHO KK
NIPPON SETSUKAI KOGYOSHO KK
JFE Steel Corp
Original Assignee
NIPPON SEKKAI KOGYOSHO KK
NIPPON SETSUKAI KOGYOSHO KK
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 NIPPON SEKKAI KOGYOSHO KK, NIPPON SETSUKAI KOGYOSHO KK, Kawasaki Steel Corp filed Critical NIPPON SEKKAI KOGYOSHO KK
Priority to JP2889079A priority Critical patent/JPS5835565B2/en
Publication of JPS55122815A publication Critical patent/JPS55122815A/en
Publication of JPS5835565B2 publication Critical patent/JPS5835565B2/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 reduce Fe content eluding into slag, by adding a slight amount of colemanite in the desulfurizing agent, when desulfurizing outside the furnace by blowing desulfurizing agent of CaO base in the molten iron in an open vessel such as open ladle. CONSTITUTION:Molten pig iron is desulfurized outside the furnace by adding desulfurizing agent of CaO base in an open vessel. In this case, as the desulfurizing agent of CaO base, besides the main component of CaO, C, CaF2 and CaCO3 are contained, farther colemanite (2CaO.3B2O3.5H2O) is added by 3-10wt%. This colemanite prevents increase of iron oxide in the slag due to temperature drop, by means of drop of melting point of desulfurized slag and improvement of fluidity.
JP2889079A 1979-03-13 1979-03-13 Out-of-furnace blowing desulfurization method to reduce iron content in slag Expired JPS5835565B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2889079A JPS5835565B2 (en) 1979-03-13 1979-03-13 Out-of-furnace blowing desulfurization method to reduce iron content in slag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2889079A JPS5835565B2 (en) 1979-03-13 1979-03-13 Out-of-furnace blowing desulfurization method to reduce iron content in slag

Publications (2)

Publication Number Publication Date
JPS55122815A true JPS55122815A (en) 1980-09-20
JPS5835565B2 JPS5835565B2 (en) 1983-08-03

Family

ID=12260983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2889079A Expired JPS5835565B2 (en) 1979-03-13 1979-03-13 Out-of-furnace blowing desulfurization method to reduce iron content in slag

Country Status (1)

Country Link
JP (1) JPS5835565B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018095902A (en) * 2016-12-12 2018-06-21 新日鐵住金株式会社 Pneumatic conveying method and refining method in steel making

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018095902A (en) * 2016-12-12 2018-06-21 新日鐵住金株式会社 Pneumatic conveying method and refining method in steel making

Also Published As

Publication number Publication date
JPS5835565B2 (en) 1983-08-03

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