FI905990A - Substance for removing sulfur from molten metal - Google Patents

Substance for removing sulfur from molten metal Download PDF

Info

Publication number
FI905990A
FI905990A FI905990A FI905990A FI905990A FI 905990 A FI905990 A FI 905990A FI 905990 A FI905990 A FI 905990A FI 905990 A FI905990 A FI 905990A FI 905990 A FI905990 A FI 905990A
Authority
FI
Finland
Prior art keywords
micron
less
media
desulphurising
silicic acid
Prior art date
Application number
FI905990A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI905990A0 (en
FI93971C (en
FI93971B (en
Inventor
Edmund Fuchs
Helmuth Jaunich
Wolfram Florin
Erich Hoffken
Original Assignee
Foseco Int
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 Foseco Int filed Critical Foseco Int
Publication of FI905990A0 publication Critical patent/FI905990A0/en
Publication of FI905990A publication Critical patent/FI905990A/en
Application granted granted Critical
Publication of FI93971B publication Critical patent/FI93971B/en
Publication of FI93971C publication Critical patent/FI93971C/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
    • 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)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

A medium for desulphurising molten metals, esp. pig iron consists of fine grained Mg particles (1-80% by wt.) -which have several coatings. The base coating is very fine particulate silicic acid (0.5-5% by wt., 0.1-5 micron) with a high specific surface which may be colloidal and/or crystalline silicic acid and/or pyrosilicic acid. Other coatings are made of strongly reactive desulphurising media (0-35%, less than 60 micron) such as Na2CO3,CaO,CaO3,Ca borate or aluminate, Na borate, or fluxes (1-25%, less than 40 micron), e.g. colemanite, fluorspar, cryolite, silicic acid, or denitrifying media (1-25%, less than 40 micron), e.g. Ti, Al, V, Ni, Mg and Na2CO3, or deoxidising media (1-25%, less than 40 micron), or the desulphurising medium pourable soft brick lime of size either less than 16 micron, or less than 40 micronmm.
FI905990A 1989-12-04 1990-12-04 Substance for removing sulfur from molten metal FI93971C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3940024 1989-12-04
DE3940024 1989-12-04
DE4002284 1990-01-26
DE4002284A DE4002284A1 (en) 1989-12-04 1990-01-26 Abrasion resistant medium for desulphurising molten iron - consists of fine grain magnesium particles having several coatings

Publications (4)

Publication Number Publication Date
FI905990A0 FI905990A0 (en) 1990-12-04
FI905990A true FI905990A (en) 1991-06-05
FI93971B FI93971B (en) 1995-03-15
FI93971C FI93971C (en) 1995-06-26

Family

ID=25887639

Family Applications (1)

Application Number Title Priority Date Filing Date
FI905990A FI93971C (en) 1989-12-04 1990-12-04 Substance for removing sulfur from molten metal

Country Status (5)

Country Link
EP (1) EP0431772B1 (en)
AT (1) ATE121140T1 (en)
DE (2) DE4002284A1 (en)
ES (1) ES2071043T3 (en)
FI (1) FI93971C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6352570B1 (en) * 2000-04-10 2002-03-05 Rossborough Manufacturing Co., Lp Magnesium desulfurization agent
US20040126583A1 (en) * 2002-11-19 2004-07-01 Takashi Nakamura Foaming agent for manufacturing a foamed or porous metal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB964299A (en) * 1962-05-29 1964-07-22 Foseco Int Treatment of molten iron
DE2157395A1 (en) * 1971-11-19 1973-05-24 Metallgesellschaft Ag Iron-alloy additives - of metal core coated with powder contg binder esp the core and powder opt being of different material
FR2456779A1 (en) * 1979-05-15 1980-12-12 Sofrem PRODUCT FOR THE DESULFURIZATION OF CAST IRONS AND STEELS
DE3831831C1 (en) * 1988-09-20 1989-11-02 Skw Trostberg Ag, 8223 Trostberg, De

Also Published As

Publication number Publication date
FI905990A0 (en) 1990-12-04
ES2071043T3 (en) 1995-06-16
EP0431772A1 (en) 1991-06-12
DE69018584D1 (en) 1995-05-18
FI93971C (en) 1995-06-26
FI93971B (en) 1995-03-15
EP0431772B1 (en) 1995-04-12
DE69018584T2 (en) 1995-08-10
DE4002284A1 (en) 1991-06-06
ATE121140T1 (en) 1995-04-15

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Legal Events

Date Code Title Description
BB Publication of examined application
MM Patent lapsed
MM Patent lapsed

Owner name: FOSECO INTERNATIONAL LIMITED