EP0784708B1 - Process and device for making liquid iron by non-electric and electric smelting - Google Patents
Process and device for making liquid iron by non-electric and electric smelting Download PDFInfo
- Publication number
- EP0784708B1 EP0784708B1 EP95931905A EP95931905A EP0784708B1 EP 0784708 B1 EP0784708 B1 EP 0784708B1 EP 95931905 A EP95931905 A EP 95931905A EP 95931905 A EP95931905 A EP 95931905A EP 0784708 B1 EP0784708 B1 EP 0784708B1
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- European Patent Office
- Prior art keywords
- vessel
- metallurgical
- oxygen
- iron
- steel works
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 title claims description 7
- 238000003723 Smelting Methods 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000010891 electric arc Methods 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims abstract description 6
- 239000000161 steel melt Substances 0.000 claims abstract description 4
- 239000003546 flue gas Substances 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 229910000805 Pig iron Inorganic materials 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 claims 5
- 238000007670 refining Methods 0.000 claims 4
- 239000000446 fuel Substances 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- -1 iron metals Chemical class 0.000 abstract description 4
- 238000010310 metallurgical process Methods 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 abstract 1
- 238000007664 blowing Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910001338 liquidmetal Inorganic materials 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Images
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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
-
- 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
- C21C5/285—Plants therefor
Definitions
- the invention relates to a method for the metallurgical treatment of Ferrous metals, in particular for the production of molten steel, and a associated steelworks facility with at least one metallurgical vessel, which can be closed by a swiveling cover which can be closed by a Flue gas manifold communicates with and through a gas cleaning system whose lid heart can be guided at least one electrode, and a device for Filling the vessel with batched goods as well as a slag removal and one in Bottom of the vessel arranged melt tap opening.
- the main hood is independent of the metallic vessel arranged ceiling connected, with which they can be moved to the side as a unit is designed.
- Electric arc furnaces are usually operated with direct current or with alternating current besides.
- a double furnace device is included
- Two-furnace vessels and a method for operating this device are known can be closed by a cover, which is connected to a flue gas manifold Gas cleaning system are connected.
- a cover which is connected to a flue gas manifold Gas cleaning system are connected.
- Both furnaces are operated in such a way that one furnace for melting the batch contained therein is supplied with electrical energy and the other is completely disconnected from the electrical network and after charging with the warm flue gases from the other furnace. It is metallurgical this is a one-step process.
- Metallurgical vessels have also been proposed. So is from the DE34 19 030 C1 a metallurgical reaction vessel, in particular a Steel mill converter, known for each process stage of a process and for operating devices arranged above and / or below the reaction vessel corresponding functional part can be rotated about a vertical axis of rotation is achievable. To the operating facilities pay z. B. exhaust pipe, Charging device, measuring lance, blowing lance and bottom descent device. These are permanently installed, while the reaction vessel is in the corresponding position is rotated.
- the reaction vessel is each suitable for one method. It is used for production of metal melts, in particular steel melts, and the production of gases such as B. of CO gases from coal and a substance by its presence Supported reaction and used up little or not at all, how e.g. B. of pig iron melting.
- the aim of the invention is to provide a method and a device suitable therefor create with the energy-saving, environmentally friendly and inexpensive metallurgical work of ferrous metals, in particular for the production of Melting steel, is feasible.
- all metallurgical work is done in one vessel carried out, this vessel once the function of a converter and immediately afterwards without transferring the melt product the function of a Arc furnace takes over.
- This can be done in a particularly advantageous manner Process in two metallurgical overlaps of 50% in their work cycles Design vessels.
- the exhaust gases are extracted during the reduction work. After inflation is complete, the phosphorus-containing slag is slagged off. At this point, an exchange of operating equipment is carried out, namely the lance and the exhaust manifold are removed, instead the electrodes are inserted and the flue gas line is opened in order to then carry out the melting work via the electric arc furnace. At the end of the process, the residual slag is slagged off and the liquid melt is tapped off at the bottom.
- the bottom cut is cleaned and closed again, the corresponding material is charged, the lid of the furnace vessel is closed, the lance or burner and the exhaust manifold are brought into position and the process can be started again.
- a melting process takes place using electrodes in the other furnace vessel. These flue gases are passed through a flue gas manifold into a mixing chamber, where they mix with the exhaust gases from the blowing process. Since the blowing process allows very high flue gas temperatures due to afterburning the CO, this ensures that possibly colder flue gases from the electric furnace operation are safely re-burned. This reliably prevents possible odor nuisance and possibly other hydrocarbon compounds such as furans and dioxins.
- a steel mill device with a metallurgical vessel in which lids are used, the lid hearts of which can be removed.
- the mouth of an exhaust manifold is placed on the lid heart opening, through this manifold and the opening in the lid at least one lance or at least one burner is brought into the interior of the upper part of the metallurgical vessel.
- the metallurgical vessel can be converted from an electric arc furnace to a converter in a few simple steps and with extremely simple design.
- the lance guided through the exhaust manifold is connected to a moving device which, as can be predetermined, immerses the lance head deep into the vessel.
- the lance used can be designed as a pure oxygen lance, as a pure burner, but also as a multifunctional lance.
- the flue gas manifold which is customary for the electric arc furnace, has shut-off devices which are closed by the exhaust manifold during the blowing phase and suction.
- the pivot points of the electrode pivoting device and the rotating device of the Exhaust manifolds are also in an electric furnace system with only one furnace vessel on one Dividing line arranged that exactly the first furnace vessel from the second (Expansion) oven vessel separates.
- FIG. 1 shows the top view of a single furnace system with the possibility of expanding it as a double furnace system.
- the lid 13 (23) attached to the lid pivoting device 14 (24) can be seen in the swung-out and in the operating position.
- the lid heart 25 can also be clearly seen.
- Flue gas manifolds 51 (52) are connected to the covers 13 (23) and are connected to a main flue gas pipe 55 via a shut-off valve 53 (54).
- the suction 56 (57) of the bulges 18 (28) are connected to the flue gas main line 52.
- the lid 13 is detachably connected to an exhaust manifold 61, which has a Rotating device 63 is pivotable.
- the flue gas main 55 and one Exhaust main line 64 are brought together in an afterburning chamber 71.
- a lance 41 is guided through the exhaust manifold 61 and is carried by a lance support arm 42 is held.
- Electrode 31 is guided through the cover heart 25 and is connected via a Electrode support arm 32 is connected to an electrode pivoting device 33.
- FIG. 2 shows schematically the two operating states, namely the metallurgical vessel in the function of a converter and the other as an arc furnace.
- a lance 41 is fastened to a lance support arm 42 and is guided coaxially to the main axis I of the vessel through an exhaust manifold 61 and the heart opening 16 into the interior of the upper part 12 of the vessel.
- the upper part 12 and the lower part 17 together form the furnace vessel 11, which is closed by a lid 13.
- the lid 13 has a lid heart opening 16, against which the mouth 62 of the exhaust manifold 61 rests.
- the exhaust manifold 61 is pivotable via a rotating device 63.
- the lower vessel 17 has a tap opening 19, in this case the bottom tap, for the metal workers.
- the furnace shown in the left half of the figure shows an electrode arm 32, to which three electrodes 31 are attached in the present case, which are guided through the cover heart 25, which closes the cover heart opening 26.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum metallurgischen Behandeln von Eisenmetallen, insbesondere zur Erzeugung von Stahlschmelzen sowie eine dazugehörige Stahlwerkseinrichtung mit mindestens einem metallurgischen Gefäß, welches durch einen verschwenkbaren Deckel verschließbar ist, der über einen Rauchgaskrümmer mit einer Gasreinigungsanlage in Verbindung steht und durch dessen Deckelherz mindestens eine Elektrode führbar ist, und einer Vorrichtung zum Befüllen des Gefäßes mit Chargiergut sowie einer Schlackenabzugs- und einer im Boden des Gefäßes angeordneten Schmelzenabstichsöffnung.The invention relates to a method for the metallurgical treatment of Ferrous metals, in particular for the production of molten steel, and a associated steelworks facility with at least one metallurgical vessel, which can be closed by a swiveling cover which can be closed by a Flue gas manifold communicates with and through a gas cleaning system whose lid heart can be guided at least one electrode, and a device for Filling the vessel with batched goods as well as a slag removal and one in Bottom of the vessel arranged melt tap opening.
Der Markt stellt an die Inhaber von Elektrostahlwerken immer höhere Anforderungen an die Qualität, sowohl bezüglich des Levels wie auch der Kontinuität und des Preisniveaus der Stahlprodukte. Aufgrund schwankender Rohrstoffpreise beabsichtigen immer mehr Produzenten neben Schrott auch größere Mengen Roheisen - flüssig oder in Masseln - im Elektrostahlwerk einzusetzen.The market places ever increasing demands on the owners of electric steel mills in terms of quality, both in terms of level as well as continuity and Price levels of steel products. Due to fluctuating raw material prices In addition to scrap, more and more producers intend to use larger quantities Pig iron - liquid or in pigs - to be used in the electrical steel works.
Aus der US-A-52 86 277 ist ein Verfahren zum metallurgischen Behandeln von Eisen, insbesondere Stahlschmelzen in einem Gefäß bekannt, wobei das Einbringen von nichtelektrischer und elektrischer Energie im mehreren Schritten erfolgt.From US-A-52 86 277 a method for metallurgical treatment of iron, especially molten steel known in a vessel, the introduction of non-electrical and electrical energy takes place in several steps.
Bislang war das Verblasen von Roheisen mit hohen Sauerstoffraten dem Konverter vorbehalten. So ist aus der DE OS 28 03 960 eine Anlage zum Frischen von Roheisen mittels Sauerstoff oder sauerstoffangereicherten Gasen bekannt, bei dem zum Erfassen der während des Frischvorgangs entweichenden Abgase eine Hauptabzugshaube vorgesehen ist. Die Abgase werden über ein an die Hauptabzugshaube angeschlossenes Abzugsrohr, das zu einer Entstaubungsanlage führt, abgesaugt. Im Abzugsrohr ist eine Öffnung vorgesehen, durch die üblicherweise die Sauerstoffaufblaslanze führbar ist. Up to now, the blowing of pig iron with high oxygen rates was the converter Reserved. So from DE OS 28 03 960 is a system for fresh iron known by means of oxygen or oxygen-enriched gases in which Detect the exhaust gases escaping during the fresh process Main hood is provided. The exhaust gases are sent to the Main extractor hood connected to a dedusting system leads, suctioned. An opening is provided in the exhaust pipe, through which usually the oxygen inflation lance is feasible.
Die Hauptabzugshaube ist mit einer unabhängig vom metallischen Gefäß angeordneten Decke verbunden, mit der sie als Einheit zur Seite verfahrbar ausgestaltet ist.The main hood is independent of the metallic vessel arranged ceiling connected, with which they can be moved to the side as a unit is designed.
Elektrolichtbogenöfen werden ublicherweise mit Gleichstrom oder mit Wechselstrom betneben. So ist aus der DE 43 02 285 A1 eine Doppelofeneinrichtung mit Zweiofengefäßen und ein Verfahren zum Betreiben dieser Einrichtung bekannt, die durch Deckel verschließbar sind, welche uber Rauchgaskrümmer mit einer Gasreinigungsanlage in Verbindung stehen. Wie in der Figur 2 dieser Schrift erkennbar, sind einmal durch den Deckel drei Elektroden eines mit Drehstrom betriebenen Ofens und einmal durch den Deckel eine Elektrode und im Boden des Gefäßes die Gegenelektrode eines mit Gleichstrom betriebenen Ofens dargestellt. Beide Öfen werden in der Weise betrieben, daß der eine Ofen zum Einschmelzen der darin befindlichen Charge mit elektrischer Energie versorgt wird und der andere vollständig vom elektrischen Netz getrennt ist und nach dem Chargieren mit den warmen Rauchgasen des anderen Ofens belegt wird. Metallurgisch handelt es sich hier um einen einstufigen Prozeß.Electric arc furnaces are usually operated with direct current or with alternating current besides. From DE 43 02 285 A1 a double furnace device is included Two-furnace vessels and a method for operating this device are known can be closed by a cover, which is connected to a flue gas manifold Gas cleaning system are connected. As in Figure 2 of this document One can see three electrodes through the cover, one with three-phase current operated oven and once through the lid an electrode and in the bottom of the The counter electrode of a furnace operated with direct current is shown. Both furnaces are operated in such a way that one furnace for melting the batch contained therein is supplied with electrical energy and the other is completely disconnected from the electrical network and after charging with the warm flue gases from the other furnace. It is metallurgical this is a one-step process.
Es sind auch bereits metallurgische Gefäße vorgeschlagen worden. So ist aus der
DE34 19 030 C1 ein metallurgisches Reaktionsgefäß, insbesondere ein
Stahlwerkskonverter, bekannt, das für jeden Verfahrensabschnitt eines Prozesses und
für über und/oder unter dem Reaktionsgefäß angeordnete Betriebseinrichtungen
entsprechenden Funktionsanteil um eine vertikale Drehachse dreheinstellbar
erreichbar ist. Zu den Betriebseinrichtungen zahlen z. B. Abgasrohr,
Chargiereinrichtung, Meßlanze, Blaslanze und Bodenabstiegseinrichtung. Diese sind
fest installiert, während das Reaktionsgefäß über die vertikale Drehachse in die
entsprechende Position verdreht wird.Metallurgical vessels have also been proposed. So is from the
Das Reaktionsgefäß ist jeweils für ein Verfahren geeignet So dient es der Erzeugung von Metallschmelzen, insbesondere Stahlschmelzen, sowie der Erzeugung von Gasen wie z. B. von CO-Gasen aus Kohle und einem Stoff, der durch seine Anwesenheit eine Reaktion unterstützt und sich dabei nur wenig oder überhaupt nicht verbraucht, wie z. B. von Roheisenschmelze. The reaction vessel is each suitable for one method. It is used for production of metal melts, in particular steel melts, and the production of gases such as B. of CO gases from coal and a substance by its presence Supported reaction and used up little or not at all, how e.g. B. of pig iron melting.
Ziel der Erfindung ist es, ein Verfahren und eine hierzu geeignete Einrichtung zu schaffen, mit dem energiesparend, umweltschonend und kostengünstig die metallurgische Arbeit von Eisenmetallen, insbesondere zur Erzeugung von Stahlschmelzen, durchführbar ist.The aim of the invention is to provide a method and a device suitable therefor create with the energy-saving, environmentally friendly and inexpensive metallurgical work of ferrous metals, in particular for the production of Melting steel, is feasible.
Die Erfindung erreicht dieses Ziel durch die kennzeichenden Merkmale des Verfahrensanspruchs 1 und des Vorrichtungsanspruchs 8. In den Unteransprüchen sind vorteilhafte Weiterbildungen dargelegt.The invention achieves this goal through the characterizing features of Process claim 1 and device claim 8. In the subclaims advantageous developments are set out.
Erfindungsgemäß werden sämtliche metallurgischen Arbeiten in einem Gefäß durchgeführt, wobei dieses Gefäß einmal die Funktion eines Konverters und unmittelbar anschließend ohne Umfüllen des Schmelzproduktes die Funktion eines Lichtbogenofens übernimmt. In besonders vorteilhafter Weise läßt sich dieses Verfahren in zwei in ihren Arbeitstakten um 50 % überschneidenden metallurgischen Gefäßen gestalten.According to the invention, all metallurgical work is done in one vessel carried out, this vessel once the function of a converter and immediately afterwards without transferring the melt product the function of a Arc furnace takes over. This can be done in a particularly advantageous manner Process in two metallurgical overlaps of 50% in their work cycles Design vessels.
Nach dem schlackefreien Abstechen der Metallschmelze aus dem Lichtbogenofen
befindet sich im Boden des Gefäßes ein Sumpf, der beim üblichen
Lichtbogenschmelzen zum erneuten Starten des Prozesses erforderlich war. Um
heftige Reaktionen mit dem flüssigen Metall beim vorliegenden Verfahren zu
unterbinden, wird Aluminium und/oder Silizium zum Binden des flüssigen Metallsumpfes eingebracht.
Nachfolgend wird kohlenstoffarmes Metall in Form von Schrott oder flüssigem Metall
chargiert.
Anschließend wird Sauerstoff aufgeblasen, hierbei wird der Siliziumgehalt reduziert
und die Charge wird insgesamt aufgeheizt. Während der Reduktionsarbeit wird
gleichzeitig Roheisen als Kühlmaterial zugegeben, um die Stahltemperatur auf einen
vorgegebenen Wert zu halten. Gleichzeitig wird zur Einstellung der Basizität Kalzium
gegeben. Während dieser ganzen Zeit ist keinerlei elektrische Arbeit erforderlich.
Zwischenzeitig wird etwa 50 % der mit Silizium angereicherten Schlacke abgeschlackt.
Während der Reduktionsarbeit werden die Abgase abgesaugt. Nach Beendigung des
Aufblasens wird die phosphorhaltige Schlacke abgeschlackt.
An dieser Stelle wird ein Austausch von Betriebseinrichtungen vorgenommen, und
zwar werden die Lanze und der Abgaskrümmer entfernt, stattdessen werden die
Elektroden eingesetzt und die Rauchgasleitung geöffnet, um anschließend die
Schmelzarbeit über den elektrischen Lichtbogenofen durchzuführen. Am Ende des
Prozesses wird die Restschlacke abgeschlackt und die Flüssigschmelze über den
Bodenabstich abgestochen.After the slag-free tapping of the molten metal from the arc furnace, there is a sump in the bottom of the vessel, which was necessary to restart the process in the usual arc melting. In order to prevent violent reactions with the liquid metal in the present method, aluminum and / or silicon is introduced to bind the liquid metal sump. Low-carbon metal is then charged in the form of scrap or liquid metal.
Then oxygen is inflated, the silicon content is reduced and the batch is heated up as a whole. During the reduction work, pig iron is added as cooling material in order to keep the steel temperature at a predetermined value. Calcium is also given to adjust the basicity. No electrical work is required all this time. In the meantime, about 50% of the slag enriched with silicon is slagged. The exhaust gases are extracted during the reduction work. After inflation is complete, the phosphorus-containing slag is slagged off.
At this point, an exchange of operating equipment is carried out, namely the lance and the exhaust manifold are removed, instead the electrodes are inserted and the flue gas line is opened in order to then carry out the melting work via the electric arc furnace. At the end of the process, the residual slag is slagged off and the liquid melt is tapped off at the bottom.
Anstelle des Aufblasens von Sauerstoff über eine Sauerstofflanze wird vorgeschlagen,
zum Entkohlen des Roheisens Sauerstofferdgas- oder Sauerstoffölbrenner
einzusetzen und diese mit überlanger Flamme und überstöchiometrischer Fahrweise
zu betreiben.
Beim Einsatz von flüssigem Metall weist dieses eine Temperatur von über 1300° auf.
Es werden verschiedene Metallmixe vorgeschlagen. Als kostengünstig hat sich ein
Verhältnis des flüssigen Roheisens zum flüssigen Metall von etwa 50:50 erwiesen.
Weiterhin wird vorgeschlagen, ein Verhältnis von Schrott:Roheisen von um die 30:70
zu fahren. Darüber hinaus wird vorgeschlagen, Schrott:Rohreisen:Flüssigmetall im
Bereich eines Verhältnisses von 10:60:30 bis 10:40:50 einzusetzen.
Nach jedem kompletten Verfahrensschritt wird der Bodenabstich gereinigt und wieder
geschlossen, das entsprechende Material wird chargiert, der Deckel des Ofengefäßes
geschlossen, die Lanze bzw. der Brenner und der Abgaskrümmer in Position gebracht
und der Prozeß kann erneut gestartet werden.
Während des Blasprozesses findet beim Einsatz einer Zweiofenanlage ein
Schmelzprozeß mittels Elektroden im anderen Ofengefäß statt. Diese Rauchgase
werden über einen Rauchgaskrümmer in eine Mischkammer geleitet und mischen sich
dort mit den Abgasen aus dem Blasprozeß. Da der Blasprozeß durch Nachwerbrennen
des CO sehr hohe Abgastemperaturen erlaubt, ist somit sichergestellt, daß evtl.
kältere Abgase aus dem Elektroofenbetrieb sicher nachverbrannt werden. Hierdurch
wird eine evtl. Geruchsbelästigung und ggf. noch andere
Kohlenwasserstoffverbindungen wie etwa Furane und Dioxine sicher verhindert.Instead of inflating oxygen via an oxygen lance, it is proposed to use oxygen natural gas or oxygen oil burners for decarburizing the pig iron and to operate it with an excessively long flame and a stoichiometric driving style.
When using liquid metal, it has a temperature of over 1300 °. Different metal mixes are proposed. A ratio of the molten pig iron to the molten metal of around 50:50 has proven to be inexpensive. It is also proposed to run a scrap: pig iron ratio of around 30:70. In addition, it is suggested to use scrap: raw travel: liquid metal in the range of 10:60:30 to 10:40:50.
After each complete process step, the bottom cut is cleaned and closed again, the corresponding material is charged, the lid of the furnace vessel is closed, the lance or burner and the exhaust manifold are brought into position and the process can be started again.
During the blowing process, when using a two-furnace system, a melting process takes place using electrodes in the other furnace vessel. These flue gases are passed through a flue gas manifold into a mixing chamber, where they mix with the exhaust gases from the blowing process. Since the blowing process allows very high flue gas temperatures due to afterburning the CO, this ensures that possibly colder flue gases from the electric furnace operation are safely re-burned. This reliably prevents possible odor nuisance and possibly other hydrocarbon compounds such as furans and dioxins.
Zur Durchführung des Verfahrens wird eine Stahlwerkseinrichtung mit einem
metallurgischen Gefäß vorgeschlagen, bei dem Deckel zum Einsatz kommen, deren
Deckelherzen entfernbar sind. Auf die Deckelherzöffnung wird die Mündung eines
Abgaskrümmers angesetzt, durch diesen Krümmer und die Öffnung im Deckel wird
mindestens eine Lanze oder mindestens ein Brenner in den Innenraum des Oberteils
des metallurgischen Gefäßes gebracht.
Durch diese angepaßten Bauteile ist mit wenigen Handgriffen und denkbar konstruktiv
einfachen Mitteln das metallurgische Gefäß vom Elektrolichtbogenofen auf einen
Konverter umbaubar. Die durch den Abgaskrümmer geführte Lanze ist an eine
Verfahreinrichtung angeschlossen, die den Lanzenkopf vorgebbar tief in das Gefäß
eintauchen läßt.
Die eingesetzte Lanze kann als reine Sauerstofflanze, als reiner Brenner, aber auch
als Multifunktionslanze ausgestaltet sein.
Der für den Elektrolichtbogenofen ubliche Rauchgaskrummer weist Absperrorgane auf,
die während der Blasphase und des Absaugens über den Abgaskrümmer
verschlossen werden.
Zum Chargieren von Flüssigmetall bzw. flüssigem Roheisen wird vorgeschlagen, am
unteren Teil des Gefäßes eine Ausbuchtung zum einfachen Zuführen der
Flüssigcharge vorzusehen.To carry out the method, a steel mill device with a metallurgical vessel is proposed, in which lids are used, the lid hearts of which can be removed. The mouth of an exhaust manifold is placed on the lid heart opening, through this manifold and the opening in the lid at least one lance or at least one burner is brought into the interior of the upper part of the metallurgical vessel.
Thanks to these adapted components, the metallurgical vessel can be converted from an electric arc furnace to a converter in a few simple steps and with extremely simple design. The lance guided through the exhaust manifold is connected to a moving device which, as can be predetermined, immerses the lance head deep into the vessel.
The lance used can be designed as a pure oxygen lance, as a pure burner, but also as a multifunctional lance.
The flue gas manifold, which is customary for the electric arc furnace, has shut-off devices which are closed by the exhaust manifold during the blowing phase and suction.
For charging liquid metal or molten pig iron, it is proposed to provide a bulge on the lower part of the vessel for easy feeding of the liquid batch.
Beim Einsatz einer Stahlwerkseinrichtung mit zwei metallurgischen Gefäßen ist
insgesamt nur eine Lanze bzw. Brennereinrichtung und ein Abgaskrümmer sowie auch
nur eine elektrische Zuführung über Tragarm und Elektrode bzw. Elektroden
erforderlich.
Durch kollisionsfreie Anordnung des Elektrodentragarmes und des
Rauchgaskrummers einschließlich der Lanzen bzw. Brennereinrichtung können durch
einfaches und kurzzeitiges Schwenken die jeweiligen Funktionen der Gefäße geändert
werden. Das nachteilige Öffnen der Deckel entfällt ebenso wie ein evtl. Umfüllen der in
den Gefäßen befindlichen Schmelze.When using a steelworks facility with two metallurgical vessels, only one lance or burner facility and one exhaust manifold as well as only one electrical supply via the support arm and electrode or electrodes is required.
Due to the collision-free arrangement of the electrode support arm and the flue gas manifold including the lances or burner device, the respective functions of the vessels can be changed by simple and brief swiveling. The disadvantageous opening of the lids is eliminated, as is the possible decanting of the melt in the vessels.
Die Schwenkpunkte der Elektrodenschwenkeinrichtung und der Drehvorrichtung des Abgaskrümmers sind auch bei einer E-Ofenanlage mit nur einem Ofengefäß auf einer Trennlinie angeordnet, die exakt das erste Ofengefäß von dem zweiten (Erweiterungs-)Ofengefäß trennt.The pivot points of the electrode pivoting device and the rotating device of the Exhaust manifolds are also in an electric furnace system with only one furnace vessel on one Dividing line arranged that exactly the first furnace vessel from the second (Expansion) oven vessel separates.
Ein Beispiel der Erfindung ist in der beiliegenden Zeichnung dargelegt. Dabei zeigen die
- Figur 1
- eine Draufsicht
- Figur 2
- eine Seitenansicht des metallurgischen Gefäßes.
- Figure 1
- a top view
- Figure 2
- a side view of the metallurgical vessel.
Die Figur 1 zeigt die Draufsicht einer Einofenanlage mit der Möglichkeit, sie als
Doppelofenanlage auszubauen.
In der Draufsicht ist vom Ofengefäß außer der Ausbuchtung 18 (28) und der
Abstichöffnung 19 (29) <hier die Schlacketür> der an die Deckelschwenkeinrichtung 14
(24) angehängte Deckel 13 (23) zu erkennen, und zwar in ausgeschwenkter und in
Betriebsposition.
Bei dem möglicherweise eingesetzten zweiten Ofen ist darüber hinaus noch deutlich
das Deckelherz 25 erkennbar.
An die Deckel 13 (23) sind Rauchgaskrümmer 51 (52) angeschlossen, die über ein
Absperrventil 53 (54) mit einer Rauchgashauptleitung 55 in Verbindung stehen. An die
Rauchgashaupfleitung 52 sind darüber hinaus die Absaugungen 56 (57) der
Ausbuchtungen 18 (28) angeschlossen.FIG. 1 shows the top view of a single furnace system with the possibility of expanding it as a double furnace system.
In the plan view, apart from the bulge 18 (28) and the tap opening 19 (29) <here the slag door>, the lid 13 (23) attached to the lid pivoting device 14 (24) can be seen in the swung-out and in the operating position.
In the case of the second oven which may be used, the
Flue gas manifolds 51 (52) are connected to the covers 13 (23) and are connected to a main
Der Deckel 13 ist lösbar verbunden mit einem Abgaskrümmer 61, der über eine
Drehvorrichtung 63 schwenkbar ist. Die Rauchgashauptleitung 55 und eine
Abgashauptleitung 64 werden in einer Nachbrennkammer 71 zusammengeführt.
Durch den Abgaskrümmer 61 ist eine Lanze 41 geführt, die von einem Lanzentragarm
42 gehalten wird.The
Durch das Deckelherz 25 ist eine Elektrode 31 geführt, die über einen
Elektrodentragarm 32 an eine Elektrodenschwenkeinrichtung 33 angeschlossen ist.An
Die Figur 2 zeigt schematisch die beiden Betriebszustände, und zwar einmal das
metallurgische Gefäß in der Funktion eines Konverters und zum anderen als
Lichtbogenofen. An einem Lanzentragarm 42 ist eine Lanze 41 befestigt, die koaxial
zur Gefäßhauptachse I durch einen Abgaskrümmer 61 und die Deckelherzöffnung 16
in den Innenraum des Gefäßoberteils 12 geführt ist. Das Oberteil 12 und das Unterteil
17 bilden zusammen das Ofengefäß 11, das durch einen Deckel 13 verschlossen ist.
Der Deckel 13 besitzt eine Deckelherzöffnung 16, gegen das die Mündung 62 des
Abgaskrümmers 61 sich anlehnt. Der Abgaskrümmer 61 ist Ober eine Drehvorrichtung
63 verschwenkbar.
Das Untergefäß 17 weist eine Abstichöffnung 19, hier den Bodenabstich, für die
Metallschmetze auf.
Der in der linken Bildhälfte dargestellte Ofen zeigt einen Elektrodenarm 32, an dem im
vorliegenden Fall drei Elektroden 31 befestigt sind, die durch das Deckelherz 25,
welches die Deckelherzöffnung 26 verschließt, geführt sind. Figure 2 shows schematically the two operating states, namely the metallurgical vessel in the function of a converter and the other as an arc furnace. A
The
The furnace shown in the left half of the figure shows an
- 11, 2111, 21
- OfengefäßOven vessel
- 12, 2212, 22
- GefäßoberteilUpper part of the vessel
- 13, 2313, 23
- Deckelcover
- 14, 2414, 24
- DeckelschwenkeinrichtungLid pivoting device
- 15, 2515, 25
- DeckelherzLid heart
- 16, 2616, 26
- DeckelherzöffnungLid heart opening
- 17, 2717, 27
- UnterteilLower part
- 18, 2818, 28
- Ausbuchtungbulge
- 19, 2919, 29
- AbstichöffnungTap hole
- 3131
- Elektrodeelectrode
- 3232
- ElektrodentragarmElectrode support arm
- 3333
- ElektrodenschwenkvorrichtungElectrode swivel device
- 4141
- Lanzelance
- 4242
- LanzentragarmLance arm
- 5151
- Rauchgaskrümmer für 11Flue gas manifold for 11
- 5252
- Rauchgaskrümmer für 21Flue gas manifold for 21
- 5353
-
Absperreinrichtung 51Shut-
off device 51 - 5454
-
Absperrvorrichtung 52Shut-
off device 52 - 5555
- RauchgashauptleitungSmoke gas main
- 5656
-
Absaugung Ausbuchtung 19
Suction bulge 19 - 5757
- Absaugung Ausbuchtung 29Suction bulge 29
- 6161
- AbgaskrümmerExhaust manifold
- 6262
- Mündung AbgaskrümmerMouth of exhaust manifold
- 6363
- DrehvorrichtungRotating device
- 6464
- AbgashauptleitungExhaust main
- 7171
- NachbrennkammerAfterburner
- II.
- GefäßhauptachseVascular main axis
- IIII
- Trennlinieparting line
Claims (14)
- Method for the metallurgical treatment of iron, in particular for producing steel melts in a vessel, by introducing non-electrical and electrical energy in a plurality of steps,
characterised by the following steps:introducing aluminium and/or silicon to deoxidise the metallic liquid pool at the bottom of the vessel remaining from a previous melt in the vessel,feeding in iron charges,introducing additional, non-electrical thermal energy by supplying oxygen,carrying out the refining process while simultaneously feeding in pig iron and adding lime,intermediate removal of up to 50% of the slag containing Si/O2,sucking off the waste gases during the surface injection phase,removing the phosphoric slag after refining,introducing thermal energy via an electric arc,sucking off the flue gases,removing the remaining slag and thentapping the melt while leaving a liquid pool, - Method according to claim 1,
characterised in that low-carbon metal in the form of scrap or molten metal is added as the iron charge. - Method according to claim 1,
characterised in that the refining is carried out by means of the surface injection of oxygen. - Method according to claim 1,
characterised in that the refining is carried out by burning an oxygen-natural gas or oxygen-oil mixture with an exceptionally long flame in a leaner-than-stoichiometric operating mode. - Method according to claim 1,
characterised in that the ratio of molten pig iron : molten iron charge is approximately 50 : 50. - Method according to claim 1 or 2,
characterised in that the ratio of scrap : pig iron is in the range from 20 : 80 to 40 : 60. - Method according to one or more of the preceding claims,
characterised in that the ratio of scrap : pig iron : molten iron charge is 10 : 60 : 30 to 10 : 40 : 50. - Steel works device with at least one metallurgical vessel (11, 21) which can be closed by a swivelling cover (13, 32) which is connected via a flue gas elbow (51, 52) to a gas cleaning plant and through the centre (15, 25) of which at least one electrode (31) can be passed, and an apparatus for filling the vessel with charge as well as a slag discharge hole and a melt tap hole (19, 29) disposed in the bottom are provided, for carrying out the method according to any one of claims 1 to 7,
characterised in that the cover centre (15 or 25) can be removed from the cover (13 or 23), that the mouth (62) of a waste gas elbow (61) can be applied to the cover centre opening (16 or 26), and that at least one lance (41) can be brought into the interior of the upper part (12 or 22) of the metallurgical vessel (11 or 21) through the cover centre opening (16 or 26). - Steel works device according to claim 8,
characterised in that the lance (41) can be guided coaxially with the principal axis (1) of the vessel and its depth of penetration into the vessel (11 or 21) can be adjusted. - Steel works device according to claim 9,
characterised in that the lance (41) is connected to an oxygen supply station and in addition to a station for supplying fuels such as natural gas or oil and is set up as burner. - Steel works device according to claim 8,
characterised in that the waste gas elbow (61) is connected to an afterburning chamber (7) which is connected to the flue gas main (55). - Steel works device according to claim 8,
characterised in that a bulge (18 or 28) is provided at the lower part (17 or 27) of the metallurgical vessel (11 or 21) for supplying liquid charges. - Steel works device according to claim 8,
characterised in that two metallurgical vessels (11, 21) which can be closed by covers (13, 23) are provided, which vessels are connected to just one electrical power supply and to just one oxygen and fuel station. - Steel works device according to claim 13,
characterised in that the waste gas elbow (61) is disposed on a line (11), which separates the two vessels (11, 21), and is mounted in a turning device (63) such that the mouth (62) of the waste gas elbow (61) can be applied alternatively to one of the cover centre openings (15, 25).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4434369 | 1994-09-15 | ||
| DE4434369A DE4434369C2 (en) | 1994-09-15 | 1994-09-15 | Method and device for the metallurgical treatment of iron |
| PCT/DE1995/001311 WO1996008584A1 (en) | 1994-09-15 | 1995-09-15 | Process and device for making liquid iron by non-electric and electric smelting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0784708A1 EP0784708A1 (en) | 1997-07-23 |
| EP0784708B1 true EP0784708B1 (en) | 1999-12-08 |
Family
ID=6529222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95931905A Expired - Lifetime EP0784708B1 (en) | 1994-09-15 | 1995-09-15 | Process and device for making liquid iron by non-electric and electric smelting |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US5961688A (en) |
| EP (1) | EP0784708B1 (en) |
| JP (1) | JP3328291B2 (en) |
| CN (1) | CN1044492C (en) |
| AT (1) | ATE187503T1 (en) |
| AU (1) | AU3516995A (en) |
| BR (1) | BR9508955A (en) |
| CZ (1) | CZ288143B6 (en) |
| DE (2) | DE4434369C2 (en) |
| ES (1) | ES2139241T3 (en) |
| GR (1) | GR3032729T3 (en) |
| HU (1) | HU218552B (en) |
| MX (1) | MX9701982A (en) |
| PL (1) | PL179468B1 (en) |
| PT (1) | PT784708E (en) |
| RO (1) | RO119313B1 (en) |
| RU (1) | RU2152437C1 (en) |
| SI (1) | SI9520099B (en) |
| TW (1) | TW320653B (en) |
| WO (1) | WO1996008584A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU88785A1 (en) * | 1996-07-03 | 1998-01-03 | Wurth Paul Sa | Method of manufacturing steel in an electric furnace with charging of liquid iron |
| DE19820589A1 (en) * | 1998-05-08 | 1999-11-11 | Wilfried Stein | Electric arc furnace with lances for introduction of solids and/or gases |
| DE19827299C1 (en) * | 1998-06-19 | 2000-03-09 | Schloemann Siemag Ag | Method and device for producing steel in a furnace vessel |
| ES2265539T3 (en) * | 2002-08-20 | 2007-02-16 | Sms Demag Aktiengesellschaft | DOUBLE OVEN INSTALLATION FOR THE PRODUCTION OF STEEL MATERIALS. |
| US8200775B2 (en) | 2005-02-01 | 2012-06-12 | Newsilike Media Group, Inc | Enhanced syndication |
| US8700738B2 (en) | 2005-02-01 | 2014-04-15 | Newsilike Media Group, Inc. | Dynamic feed generation |
| US9202084B2 (en) | 2006-02-01 | 2015-12-01 | Newsilike Media Group, Inc. | Security facility for maintaining health care data pools |
| US7381926B2 (en) * | 2005-09-09 | 2008-06-03 | Applied Materials, Inc. | Removable heater |
| US8140482B2 (en) | 2007-09-19 | 2012-03-20 | Moore James F | Using RSS archives |
| US20070050446A1 (en) | 2005-02-01 | 2007-03-01 | Moore James F | Managing network-accessible resources |
| US8347088B2 (en) | 2005-02-01 | 2013-01-01 | Newsilike Media Group, Inc | Security systems and methods for use with structured and unstructured data |
| CN101007340B (en) * | 2007-01-25 | 2010-05-19 | 鞍钢股份有限公司 | Treatment method for reducing residual molten steel in continuous casting tundish |
| CN102362137B (en) * | 2009-03-31 | 2014-04-30 | Sms康卡斯特意大利股份有限公司 | Electric arc furnace |
| CN102010927B (en) * | 2010-12-28 | 2012-06-20 | 天津二十冶建设有限公司 | Integral hydraulic jacking inverted construction method of large converter |
| JP7094264B2 (en) * | 2019-12-25 | 2022-07-01 | 株式会社神戸製鋼所 | Manufacturing method of molten steel |
| CN112094977B (en) * | 2020-08-26 | 2021-07-02 | 北京科技大学 | Process and system for efficient smelting of double-furnace electric-converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1219959B (en) * | 1962-11-13 | 1966-06-30 | Heurtey Sa | Process for the production of steel and similar metals in electric arc furnaces |
| US3812275A (en) * | 1973-02-26 | 1974-05-21 | Pennsylvania Engineering Corp | Steel production method and apparatus |
| DE2939859C2 (en) * | 1979-10-02 | 1983-06-23 | Klöckner-Werke AG, 4100 Duisburg | Steel making process |
| AT376702B (en) * | 1983-04-06 | 1984-12-27 | Voest Alpine Ag | METHOD FOR OPERATING A METALLURGICAL SYSTEM |
| AT382639B (en) * | 1985-04-26 | 1987-03-25 | Voest Alpine Ag | METHOD FOR PRODUCING STEEL FROM SPONGE OF IRON, AND SYSTEM FOR IMPLEMENTING THE METHOD |
| DE3921807A1 (en) * | 1989-07-03 | 1991-01-10 | Mannesmann Ag | METHOD AND DEVICE FOR HEATING A METALURGIC OVEN |
| DE4138120A1 (en) * | 1991-11-19 | 1993-05-27 | Fuchs Technology Ag | MELTING UNIT WITH OVEN CRADLE |
| AT396942B (en) * | 1991-12-16 | 1993-12-27 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING METAL MELT, IN PARTICULAR STEEL MELT |
| AT396370B (en) * | 1992-03-31 | 1993-08-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING STEEL FROM SCRAP |
| DE4215858C2 (en) * | 1992-05-14 | 1995-09-14 | Metallgesellschaft Ag | Method and device for the production of molten steel |
| US5286277A (en) * | 1992-05-26 | 1994-02-15 | Zaptech Corporation | Method for producing steel |
| ATA121393A (en) * | 1993-06-21 | 1998-07-15 | Voest Alpine Ind Anlagen | CONVERTER AND METHOD FOR PRODUCING STEEL |
| AT400245B (en) * | 1993-12-10 | 1995-11-27 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR PRODUCING A MELTING IRON |
| US5541952A (en) * | 1994-06-21 | 1996-07-30 | Mannesmann Demag Corporation | Apparatus and method of preheating steel scrap for a twin shell electric arc furnace |
-
1994
- 1994-09-15 DE DE4434369A patent/DE4434369C2/en not_active Expired - Fee Related
-
1995
- 1995-09-15 SI SI9520099A patent/SI9520099B/en not_active IP Right Cessation
- 1995-09-15 CN CN95195104A patent/CN1044492C/en not_active Expired - Lifetime
- 1995-09-15 US US08/793,777 patent/US5961688A/en not_active Expired - Lifetime
- 1995-09-15 BR BR9508955A patent/BR9508955A/en not_active IP Right Cessation
- 1995-09-15 RU RU97105844/02A patent/RU2152437C1/en active
- 1995-09-15 DE DE59507399T patent/DE59507399D1/en not_active Expired - Lifetime
- 1995-09-15 AT AT95931905T patent/ATE187503T1/en active
- 1995-09-15 MX MX9701982A patent/MX9701982A/en unknown
- 1995-09-15 EP EP95931905A patent/EP0784708B1/en not_active Expired - Lifetime
- 1995-09-15 RO RO97-00454A patent/RO119313B1/en unknown
- 1995-09-15 CZ CZ1997796A patent/CZ288143B6/en not_active IP Right Cessation
- 1995-09-15 HU HU9801471A patent/HU218552B/en not_active IP Right Cessation
- 1995-09-15 ES ES95931905T patent/ES2139241T3/en not_active Expired - Lifetime
- 1995-09-15 WO PCT/DE1995/001311 patent/WO1996008584A1/en active IP Right Grant
- 1995-09-15 JP JP50982496A patent/JP3328291B2/en not_active Expired - Lifetime
- 1995-09-15 AU AU35169/95A patent/AU3516995A/en not_active Abandoned
- 1995-09-15 PT PT95931905T patent/PT784708E/en unknown
- 1995-09-15 PL PL95319177A patent/PL179468B1/en unknown
-
1996
- 1996-09-19 TW TW085111472A patent/TW320653B/zh not_active IP Right Cessation
-
2000
- 2000-02-23 GR GR20000400428T patent/GR3032729T3/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| CORNARC: Process and Plant Installation (Firmenprospekt) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ288143B6 (en) | 2001-05-16 |
| TW320653B (en) | 1997-11-21 |
| CN1044492C (en) | 1999-08-04 |
| CZ79697A3 (en) | 1997-07-16 |
| GR3032729T3 (en) | 2000-06-30 |
| PL319177A1 (en) | 1997-08-04 |
| RO119313B1 (en) | 2004-07-30 |
| WO1996008584A1 (en) | 1996-03-21 |
| JP3328291B2 (en) | 2002-09-24 |
| PT784708E (en) | 2000-05-31 |
| BR9508955A (en) | 1998-01-06 |
| RU2152437C1 (en) | 2000-07-10 |
| ATE187503T1 (en) | 1999-12-15 |
| US5961688A (en) | 1999-10-05 |
| JPH10505637A (en) | 1998-06-02 |
| PL179468B1 (en) | 2000-09-29 |
| DE4434369C2 (en) | 1997-08-07 |
| SI9520099B (en) | 2002-02-28 |
| DE4434369A1 (en) | 1996-03-21 |
| EP0784708A1 (en) | 1997-07-23 |
| HU218552B (en) | 2000-10-28 |
| SI9520099A (en) | 1997-08-31 |
| CN1158147A (en) | 1997-08-27 |
| HUT77889A (en) | 1998-09-28 |
| MX9701982A (en) | 1998-02-28 |
| DE59507399D1 (en) | 2000-01-13 |
| ES2139241T3 (en) | 2000-02-01 |
| AU3516995A (en) | 1996-03-29 |
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