ATE121140T1 - DESULFULIZER FOR MOLTEN METAL. - Google Patents

DESULFULIZER FOR MOLTEN METAL.

Info

Publication number
ATE121140T1
ATE121140T1 AT90312432T AT90312432T ATE121140T1 AT E121140 T1 ATE121140 T1 AT E121140T1 AT 90312432 T AT90312432 T AT 90312432T AT 90312432 T AT90312432 T AT 90312432T AT E121140 T1 ATE121140 T1 AT E121140T1
Authority
AT
Austria
Prior art keywords
micron
less
media
desulphurising
silicic acid
Prior art date
Application number
AT90312432T
Other languages
German (de)
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
Application granted granted Critical
Publication of ATE121140T1 publication Critical patent/ATE121140T1/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.
AT90312432T 1989-12-04 1990-11-14 DESULFULIZER FOR MOLTEN METAL. ATE121140T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940024 1989-12-04
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 (1)

Publication Number Publication Date
ATE121140T1 true ATE121140T1 (en) 1995-04-15

Family

ID=25887639

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90312432T ATE121140T1 (en) 1989-12-04 1990-11-14 DESULFULIZER FOR 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
EP0431772B1 (en) 1995-04-12
FI93971B (en) 1995-03-15
FI905990A0 (en) 1990-12-04
DE69018584T2 (en) 1995-08-10
FI905990A (en) 1991-06-05
DE4002284A1 (en) 1991-06-06
DE69018584D1 (en) 1995-05-18
FI93971C (en) 1995-06-26
EP0431772A1 (en) 1991-06-12
ES2071043T3 (en) 1995-06-16

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee