DE59910702D1 - Process for the desulfurization of a pig iron melt - Google Patents
Process for the desulfurization of a pig iron meltInfo
- Publication number
- DE59910702D1 DE59910702D1 DE59910702T DE59910702T DE59910702D1 DE 59910702 D1 DE59910702 D1 DE 59910702D1 DE 59910702 T DE59910702 T DE 59910702T DE 59910702 T DE59910702 T DE 59910702T DE 59910702 D1 DE59910702 D1 DE 59910702D1
- Authority
- DE
- Germany
- Prior art keywords
- pig iron
- gas
- relatively high
- gas quantity
- desulfurization
- 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
- 229910000805 Pig iron Inorganic materials 0.000 title abstract 3
- 238000006477 desulfuration reaction Methods 0.000 title 1
- 230000023556 desulfurization Effects 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 6
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 239000000654 additive Substances 0.000 abstract 2
- 230000000996 additive effect Effects 0.000 abstract 2
- 239000003245 coal Substances 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 229910014813 CaC2 Inorganic materials 0.000 abstract 1
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
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
- 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)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Molten pig iron is desulfurized by injection of a high reducing additive content agent under conditions which take thermodynamic and reaction kinetics requirements into account. Preferred Features: The parameters are a relatively high ratio of the agent injection rate to the transport gas rate, a relatively high specific total gas quantity and a relatively high ratio of evolved gas quantity to transport gas quantity. The agent comprises (by wt.) 30-72 CaC2, 15-62% CaO and 8-20% gas-evolving additive, especially gas coal, flame coal, plastic or other hydrocarbon which evolves reducing gases at pig iron temperatures of 1150-1500 degrees C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833036A DE19833036A1 (en) | 1998-07-22 | 1998-07-22 | Process for the desulfurization of a pig iron melt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE59910702D1 true DE59910702D1 (en) | 2004-11-11 |
Family
ID=7874963
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833036A Withdrawn DE19833036A1 (en) | 1998-07-22 | 1998-07-22 | Process for the desulfurization of a pig iron melt |
| DE59910702T Expired - Lifetime DE59910702D1 (en) | 1998-07-22 | 1999-03-31 | Process for the desulfurization of a pig iron melt |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833036A Withdrawn DE19833036A1 (en) | 1998-07-22 | 1998-07-22 | Process for the desulfurization of a pig iron melt |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0974674B1 (en) |
| AT (1) | ATE278810T1 (en) |
| DE (2) | DE19833036A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2261138C3 (en) * | 1972-12-14 | 1975-05-15 | Polysius Ag, 4723 Neubeckum | Process for introducing aggregates into a metallurgical bath |
| US3955966A (en) * | 1974-03-06 | 1976-05-11 | August Thyssen-Hutte Ag | Method for dispensing a fluidizable solid from a pressure vessel |
| DE2716457C2 (en) * | 1977-04-14 | 1985-11-21 | Skw Trostberg Ag, 8223 Trostberg | Process for injecting desulphurisation mixtures into iron melts |
| DE3544563C2 (en) * | 1985-12-17 | 1998-07-16 | Sueddeutsche Kalkstickstoff | Means for desulfurizing molten iron |
| DE3942405A1 (en) * | 1989-12-21 | 1991-06-27 | Krupp Polysius Ag | METHOD AND CONVEYOR FOR BLOWING IN POWDER-SHAPED TREATMENT AGAINST RAW IRON AND STEEL MELTS |
| UA32411C2 (en) * | 1991-08-28 | 2000-12-15 | Тіссен Шталь Аг | Mehtod for treatment of blast furnace cast iron melts in the tank (variants) |
| CA2054244C (en) * | 1991-10-25 | 2000-08-01 | Bruce James Barker | Powdered desulfurizing reagent and process of use |
-
1998
- 1998-07-22 DE DE19833036A patent/DE19833036A1/en not_active Withdrawn
-
1999
- 1999-03-31 EP EP99106652A patent/EP0974674B1/en not_active Expired - Lifetime
- 1999-03-31 AT AT99106652T patent/ATE278810T1/en not_active IP Right Cessation
- 1999-03-31 DE DE59910702T patent/DE59910702D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0974674A1 (en) | 2000-01-26 |
| ATE278810T1 (en) | 2004-10-15 |
| DE19833036A1 (en) | 2000-01-27 |
| EP0974674B1 (en) | 2004-10-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| R082 | Change of representative |
Ref document number: 974674 Country of ref document: EP Representative=s name: RA U. PA VOLKMAR TETZNER; PA MICHAEL TETZNER; RA T |