ES2071043T3 - AGENT FOR DESULFURATION OF CAST METAL. - Google Patents
AGENT FOR DESULFURATION OF CAST METAL.Info
- Publication number
- ES2071043T3 ES2071043T3 ES90312432T ES90312432T ES2071043T3 ES 2071043 T3 ES2071043 T3 ES 2071043T3 ES 90312432 T ES90312432 T ES 90312432T ES 90312432 T ES90312432 T ES 90312432T ES 2071043 T3 ES2071043 T3 ES 2071043T3
- Authority
- ES
- Spain
- Prior art keywords
- micron
- less
- media
- desulphurising
- silicic acid
- 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.)
- Expired - Lifetime
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.
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 |
|---|---|
| ES2071043T3 true ES2071043T3 (en) | 1995-06-16 |
Family
ID=25887639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES90312432T Expired - Lifetime ES2071043T3 (en) | 1989-12-04 | 1990-11-14 | AGENT FOR DESULFURATION OF CAST 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)
| 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)
| 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 |
-
1990
- 1990-01-26 DE DE4002284A patent/DE4002284A1/en not_active Withdrawn
- 1990-11-14 EP EP90312432A patent/EP0431772B1/en not_active Expired - Lifetime
- 1990-11-14 DE DE69018584T patent/DE69018584T2/en not_active Expired - Fee Related
- 1990-11-14 ES ES90312432T patent/ES2071043T3/en not_active Expired - Lifetime
- 1990-11-14 AT AT90312432T patent/ATE121140T1/en not_active IP Right Cessation
- 1990-12-04 FI FI905990A patent/FI93971C/en not_active IP Right Cessation
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 |
| ATE121140T1 (en) | 1995-04-15 |
| FI93971C (en) | 1995-06-26 |
| EP0431772A1 (en) | 1991-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
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