SE8400933L - WAY TO TREAT THE EQUIPMENT - Google Patents

WAY TO TREAT THE EQUIPMENT

Info

Publication number
SE8400933L
SE8400933L SE8400933A SE8400933A SE8400933L SE 8400933 L SE8400933 L SE 8400933L SE 8400933 A SE8400933 A SE 8400933A SE 8400933 A SE8400933 A SE 8400933A SE 8400933 L SE8400933 L SE 8400933L
Authority
SE
Sweden
Prior art keywords
sulphur
slag
lime
calcium
silicon
Prior art date
Application number
SE8400933A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE441365B (en
SE8400933D0 (en
Inventor
P-A Lundstrom
M K O Johnsson
Original Assignee
Uddeholms Ab
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 Uddeholms Ab filed Critical Uddeholms Ab
Priority to SE8400933A priority Critical patent/SE441365B/en
Publication of SE8400933D0 publication Critical patent/SE8400933D0/en
Priority to PCT/SE1985/000011 priority patent/WO1986004096A1/en
Priority to EP19850900790 priority patent/EP0245235A1/en
Publication of SE8400933L publication Critical patent/SE8400933L/en
Publication of SE441365B publication Critical patent/SE441365B/en

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
    • 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
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur

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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A method for treating pig iron, i.e. crude iron containing more than 3% carbon, in order to remove silicon and sulphur therefrom, comprises charging a converter with the molten pig iron, said converter being provided with at least one tuyere in its bottom and/or its side and containing slag from the preceding cycle, said slag being rich in sulphur and calcium, said calcium being bound partly to the sulphur in the form of calcium sulfide, partly being present in the form of excess lime (calcium oxide). The silicon of the pig iron is oxidized and the silicon oxide formed is bound by the excess lime of the slag. The slag formed is poured out and an excess of lime is added to the remaining iron melt to react with and bind any sulphur present in the melt. Stirring gas is entered through said tuyere(s), and the melt, refined with respect to silicon and sulphur, is drawn off below the covering slag bed. The slag, rich in sulphur and lime, is kept in the converter to be used with the next charge.
SE8400933A 1984-02-21 1984-02-21 WAY TO TREAT THE EQUIPMENT SE441365B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8400933A SE441365B (en) 1984-02-21 1984-02-21 WAY TO TREAT THE EQUIPMENT
PCT/SE1985/000011 WO1986004096A1 (en) 1984-02-21 1985-01-14 Method for treating pig iron
EP19850900790 EP0245235A1 (en) 1984-02-21 1985-01-14 Method for treating pig iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8400933A SE441365B (en) 1984-02-21 1984-02-21 WAY TO TREAT THE EQUIPMENT

Publications (3)

Publication Number Publication Date
SE8400933D0 SE8400933D0 (en) 1984-02-21
SE8400933L true SE8400933L (en) 1985-08-22
SE441365B SE441365B (en) 1985-09-30

Family

ID=20354832

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8400933A SE441365B (en) 1984-02-21 1984-02-21 WAY TO TREAT THE EQUIPMENT

Country Status (3)

Country Link
EP (1) EP0245235A1 (en)
SE (1) SE441365B (en)
WO (1) WO1986004096A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767078A (en) * 1952-08-06 1956-10-16 Electro Chimie Metal Process for desiliconizing and desulphurizing pig iron

Also Published As

Publication number Publication date
WO1986004096A1 (en) 1986-07-17
SE441365B (en) 1985-09-30
SE8400933D0 (en) 1984-02-21
EP0245235A1 (en) 1987-11-19

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