EP0061987A1 - Procédé et dispositif pour le traitement de métaux fondus dans le cadre de la métallurgie - Google Patents
Procédé et dispositif pour le traitement de métaux fondus dans le cadre de la métallurgie Download PDFInfo
- Publication number
- EP0061987A1 EP0061987A1 EP82630019A EP82630019A EP0061987A1 EP 0061987 A1 EP0061987 A1 EP 0061987A1 EP 82630019 A EP82630019 A EP 82630019A EP 82630019 A EP82630019 A EP 82630019A EP 0061987 A1 EP0061987 A1 EP 0061987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solids
- gases
- melt
- gas
- supply
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 150000002739 metals Chemical class 0.000 title claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims abstract description 26
- 239000000155 melt Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 5
- 239000004575 stone Substances 0.000 claims abstract description 5
- 238000005275 alloying Methods 0.000 claims abstract description 4
- 230000009257 reactivity Effects 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 6
- 230000001413 cellular effect Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 229910000805 Pig iron Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000161 steel melt Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
Definitions
- the present invention relates to a method and a device for treating molten metals, in particular molten iron, in the context of metallurgical fresh, alloying or cleaning processes.
- a metal melt is treated by charging in any metallurgical process, be it with a gas or with a solid, one will endeavor to make the treatment effective by ensuring that the contact between the melt and the treatment agent is so long as possible. Long-term contact can usually be achieved by introducing the agent into the melt as close to the bottom of the vessel as possible.
- DE-AS 22 09 902 describes a typical process in which a steel melt is treated by means of solids introduced by immersion lances. Introduce CaC2 into the melt with the help of a neutral carrier gas, whereby the lance should be at least 2 m long.
- a neutral carrier gas whereby the lance should be at least 2 m long.
- calcium which in 1600 ° C a vapor pressure of 2.13 atu. has liquid in the melt, provided it is at least 1.7 m below the bath surface. It is taught, for example, that the liquid calcium drops rise much more slowly than the vapor bubbles, which leads to an extended contact time and thus an improved utilization of the amount of calcium used.
- iron smelting can be treated with carbon by, according to DE-AS 28 38 983, on the one hand directing an oxygen jet from above onto the melt and on the other hand feeding powdered carbon with oxygen through nozzles arranged below the bath level in the lining of the vessel.
- the aim of the invention was therefore to propose a method for treating molten metals, which on the one hand allows the supply of treatment materials, which includes long-term contact and which on the other hand has a high degree of flexibility, in particular as regards the possibility of a rapid change from gaseous and solid material or from Mixtures allowed.
- the new process should not require expensive and large-scale devices and should avoid the unnecessary consumption of gases and solids.
- simplifications offered by the method according to the invention when performing methods known per se are, inter alia, in the fact that it is not only faster, cheaper and easier to carry out, but also that additional process steps can be built in which traditionally cannot be provided within the scope of the known processes.
- an oxygen inflation process for processing pig iron can be used to process certain quantities of scrap, namely 25-27% scrap / ton of pig iron.
- the energy required for this is generated by the heat released in the bath when the carbon contained in pig iron is burned.
- her Germany patent LU 81.207 the applicant has described a process which allows additional amounts of energy to be released by post-burning the carbon monoxide formed above the bath, which allow the usual scrap rates to be increased to 38-40% scrap / ton of pig iron .
- this is a significant step forward, the metallurgist has to deal with the question of whether it would not be possible to improve these results without extra cost and time, namely by recooling the bath.
- This idea is not new in itself, but it is difficult to implement, as stated at the beginning, and has therefore hardly been pursued.
- the process according to the invention makes it possible, for example, to proceed as follows: a pig iron melt containing 3-4% C is freshly blown up to a carbon content of around 2% C by blowing oxygen and the melt is simultaneously treated with inert gas which is introduced from below according to the invention. This favors the afterburning of the developing carbon monoxide above. Bath surface and thereby provides the energy required to melt the scrap used. Then, according to the invention, the supply of solid carbon is switched on by the same charging unit which manages the supply of inert gas and this supply is maintained until the iron bath has been sufficiently carburized and further supply of scrap can be carried out without cooling the melt to fear a critical limit.
- the entered carbon can have grain sizes of 80-200A; the inert gas can be nitrogen or argon and can be conducted at speeds between 20 and 30 m / sec. Here you can convey about 12 kg of carbon per Nm 3 of gas and per minute through a loading unit.
- charging units will be arranged in the bottom of the metallurgical vessel, which are operated individually or in total in the course of the process as required. This also understands the measure that one takes into account the chemical reactivity of the gases or solids, as well as the thermal conditions within the melt, in that exothermic gases or solids are introduced into the melt with the help of such charging units, which are colder below Bath zones are arranged and that the procedure is reversed when using exothermic gases or solids.
- the method according to the invention is used in the context of other processes, for example in the production of alloy steel in an electric furnace, then the alloying elements will be distributed according to their reactivity and introduced alternately and in the meantime flushed with gas and swirled through the melt. The same applies to deoxidation processes.
- Argon serves as the carrier gas. This first measure serves to cover the melt and thus to prevent the absorption of nitrogen and oxygen from the air. Then you switch off the supply of ripe lime and start to feed a mixture of lime and metallic aluminum into the melt through the same feed unit until the latter is deoxidized. This treatment is followed by the addition of a mixture of lime and fluorite and possibly also calcium carbide, which largely reduces both the sulfur content and the inclusion content.
- the device for carrying out the method according to the invention is a loading unit which understands a fire-resistant, gas-permeable structure which consists of at least two fire-resistant, unfired, e.g. segments composed of carbon-bonded or chemically bonded material are built up, which are provided on at least one longitudinal surface with a metal coating pressed in with the refractory material, so that the segments are combined by a common metal housing which is sealed to the longitudinal surfaces of the segments, optionally with the interposition of a Mortar layer, and that at least one connection and a distribution space for the material supply are arranged on an end face of the structure, the connection being connected to at least one gas and at least one solids supply device, each of which understands a metering device.
- a fire-resistant, gas-permeable structure which consists of at least two fire-resistant, unfired, e.g. segments composed of carbon-bonded or chemically bonded material are built up, which are provided on at least one longitudinal surface with a metal coating pressed in with the
- the dosing device for solids is usefully a per se known cellular wheel blow-through lock as the applicant for example in described their Luxembourg patent LU 80.692.
- gas-permeable structures which are provided in accordance with the prior art for supplying gases into liquid metals and as described by the applicant in her Luxembourg patents 82,552, 82,553, 82,554 and 82,597 are used for the combined introduction of gases and solids, what is made possible by coupling the structure with solid feed devices which are also known but are used in other contexts.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU83247A LU83247A1 (de) | 1981-03-23 | 1981-03-23 | Verfahren und vorrichtung zum behandeln von metallschmelzen im rahmen metallurgischer prozesse |
| LU83247 | 1981-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0061987A1 true EP0061987A1 (fr) | 1982-10-06 |
Family
ID=19729612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82630019A Withdrawn EP0061987A1 (fr) | 1981-03-23 | 1982-03-08 | Procédé et dispositif pour le traitement de métaux fondus dans le cadre de la métallurgie |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4421555A (fr) |
| EP (1) | EP0061987A1 (fr) |
| JP (1) | JPS57185932A (fr) |
| LU (1) | LU83247A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3581431D1 (de) * | 1984-05-11 | 1991-02-28 | Jakes Howden & Co Ltd | Verfahren zum betreiben eines metallurgischen ofens. |
| ATE234939T1 (de) * | 1998-06-10 | 2003-04-15 | Sms Demag Ag | Verfahren und anlage zur stahlherstellung in einem elektrostahlofen bestückt mit flüssigem roheisen aus einem minihochofen und weniger schrott |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE763185C (de) * | 1938-06-14 | 1953-02-09 | August Thyssen Huette A G | Verfahren und Vorrichtung zum Einbringen von Zusatzstoffen in den Konverter |
| GB808145A (en) * | 1955-07-05 | 1959-01-28 | Siderurgie Fse Inst Rech | Method and means for blowing gases possibly carrying pulverulent material into a bath of molten metal |
| DE1583219A1 (de) * | 1967-11-28 | 1970-07-30 | Basf Ag | Verfahren zur Behandlung von Metallschmelzen,vorzugsweise von Stahlschmelzen |
| DE2209902B2 (de) * | 1972-03-01 | 1975-01-16 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Verfahren zur Entschwefelung von Stahlschmelzen |
| DE2801487A1 (de) * | 1977-01-17 | 1978-07-20 | Centro Speriment Metallurg | Vorrichtung zum einblasen fluider stoffe in baeder schmelzfluessiger metalle |
| DE2951202A1 (de) * | 1978-12-21 | 1980-07-10 | Kawasaki Steel Co | Verfahren zum von unten her erfolgenden bzw. bodenseitigen einblasen von gas in eine stahlschmelze |
| EP0013550A1 (fr) * | 1978-12-21 | 1980-07-23 | Arbed S.A. | Procédé et installation de désulfuration de fer fondu |
| DE2838983B2 (de) * | 1978-09-07 | 1980-09-25 | Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg | Verfahren zur Erzeugung von .Stahl im Konverter |
| US4232854A (en) * | 1978-05-26 | 1980-11-11 | Barbakadze Dzhondo F | Method of introducing powdered reagents into molten metals and apparatus for effecting same |
| EP0018935A1 (fr) * | 1979-04-30 | 1980-11-12 | Arbed S.A. | Procédé d'affinage d'un bain de métal contenant des matières refroidissantes solides |
| EP0021861A1 (fr) * | 1979-04-25 | 1981-01-07 | INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France | Pièce réfractaire perméable aux gaz et son procédé de fabrication |
| EP0043338A1 (fr) * | 1980-06-25 | 1982-01-06 | Arbed S.A. | Elément réfractaire perméable aux gaz |
| EP0043787A1 (fr) * | 1980-07-09 | 1982-01-13 | Arbed S.A. | Elément réfractaire perméable aux gaz |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1027537A (en) * | 1964-03-14 | 1966-04-27 | British Cast Iron Res Ass | Improvements in ladles for treatment of molten metals |
| FR90350E (fr) * | 1965-10-21 | 1967-11-24 | Air Liquide | Procédé de traitement des métaux liquides, applicable notamment à l'élaboration de fonte nodulaire |
| US3619172A (en) * | 1966-09-13 | 1971-11-09 | Air Liquide | Process for forming spheroidal graphite in hypereutectoid steels |
-
1981
- 1981-03-23 LU LU83247A patent/LU83247A1/de unknown
-
1982
- 1982-03-08 EP EP82630019A patent/EP0061987A1/fr not_active Withdrawn
- 1982-03-22 US US06/360,815 patent/US4421555A/en not_active Expired - Fee Related
- 1982-03-23 JP JP57046146A patent/JPS57185932A/ja active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE763185C (de) * | 1938-06-14 | 1953-02-09 | August Thyssen Huette A G | Verfahren und Vorrichtung zum Einbringen von Zusatzstoffen in den Konverter |
| GB808145A (en) * | 1955-07-05 | 1959-01-28 | Siderurgie Fse Inst Rech | Method and means for blowing gases possibly carrying pulverulent material into a bath of molten metal |
| DE1583219A1 (de) * | 1967-11-28 | 1970-07-30 | Basf Ag | Verfahren zur Behandlung von Metallschmelzen,vorzugsweise von Stahlschmelzen |
| DE2209902B2 (de) * | 1972-03-01 | 1975-01-16 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Verfahren zur Entschwefelung von Stahlschmelzen |
| DE2801487A1 (de) * | 1977-01-17 | 1978-07-20 | Centro Speriment Metallurg | Vorrichtung zum einblasen fluider stoffe in baeder schmelzfluessiger metalle |
| US4232854A (en) * | 1978-05-26 | 1980-11-11 | Barbakadze Dzhondo F | Method of introducing powdered reagents into molten metals and apparatus for effecting same |
| DE2838983B2 (de) * | 1978-09-07 | 1980-09-25 | Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg | Verfahren zur Erzeugung von .Stahl im Konverter |
| EP0013550A1 (fr) * | 1978-12-21 | 1980-07-23 | Arbed S.A. | Procédé et installation de désulfuration de fer fondu |
| DE2951202A1 (de) * | 1978-12-21 | 1980-07-10 | Kawasaki Steel Co | Verfahren zum von unten her erfolgenden bzw. bodenseitigen einblasen von gas in eine stahlschmelze |
| EP0021861A1 (fr) * | 1979-04-25 | 1981-01-07 | INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France | Pièce réfractaire perméable aux gaz et son procédé de fabrication |
| EP0018935A1 (fr) * | 1979-04-30 | 1980-11-12 | Arbed S.A. | Procédé d'affinage d'un bain de métal contenant des matières refroidissantes solides |
| EP0043338A1 (fr) * | 1980-06-25 | 1982-01-06 | Arbed S.A. | Elément réfractaire perméable aux gaz |
| EP0043787A1 (fr) * | 1980-07-09 | 1982-01-13 | Arbed S.A. | Elément réfractaire perméable aux gaz |
Also Published As
| Publication number | Publication date |
|---|---|
| LU83247A1 (de) | 1983-02-22 |
| US4421555A (en) | 1983-12-20 |
| JPS57185932A (en) | 1982-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE DE FR GB IT NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19840924 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LEGILLE, EDOUARD Inventor name: METZ, PAUL Inventor name: SCHLEIMER, FRANCOIS Inventor name: WEINER, ANTOINE |