EP1391523B1 - Twin-furnaces unit for steel production - Google Patents
Twin-furnaces unit for steel production Download PDFInfo
- Publication number
- EP1391523B1 EP1391523B1 EP03018545A EP03018545A EP1391523B1 EP 1391523 B1 EP1391523 B1 EP 1391523B1 EP 03018545 A EP03018545 A EP 03018545A EP 03018545 A EP03018545 A EP 03018545A EP 1391523 B1 EP1391523 B1 EP 1391523B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- furnace
- platform
- cover
- twin
- tipping
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910000831 Steel Inorganic materials 0.000 title claims description 3
- 239000010959 steel Substances 0.000 title claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 229910052760 oxygen Inorganic materials 0.000 claims description 21
- 239000001301 oxygen Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 239000002912 waste gas Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims 2
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5294—General arrangement or layout of the electric melt shop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
Definitions
- the invention relates to a double furnace plant for the production of steel materials by alternately charging iron-containing feedstocks, oxygen inflation and arc melting respectively by means of a furnace A and a furnace B, which are each arranged on a tiltable furnace platform and with a between the furnaces A and B arranged pivot column to which a raisable and lowerable electrode support device is attached and with a pivoting device for at least one oxygen Aufblaslanze.
- Such a double electric arc furnace plant is known from DE 44 34 369 and EP 0 717 115 B1. It can be assumed that the two furnace vessels are each arranged on a separate tilting platform. Between these two tilting stages, the pivotable, raisable and lowerable electrode support device is provided on the fixed oven platform. As a result, the scrap can be melted alternately in two furnace vessels. Accordingly, while electrical energy is introduced into the melt in a furnace vessel by means of the pivotable, liftable and lowerable electrode support arms, the tapping can take place at the second furnace vessel and scrap can be introduced for the next melt. In the system known from DE 44 34 369 two ovens a common non-tilting lance device is assigned.
- CONARC is a registered trademark of Messrs. SMS Demag AG
- an oxygen lance e.g. in the form of a top lance
- the electrode support device can not be tilted simultaneously with the respective tilting stage and the respective furnace vessel. If the use of the electrodes in a tilted position of the furnace vessel is appropriate, it lacks the necessary conditions. In general, the leadthrough must have an oversized opening. It should also be noted that the passage of the electrodes through the furnace lid requires the least possible path. A small way is generally achieved through the scheduling of roll and curve weighing. However, the use of such cradles is associated with high technical complexity. Furthermore, large forces occur on the piston-cylinder unit during tilting of the bricked and charged furnace vessel. Furthermore, roller and curve weighing are subject to high wear. The replacement of rollers and rails is also associated with high costs and long downtime of the production plant. With the help of all these measures, the achievable tilt angle can only be set at approx. ⁇ 3 °.
- Double oven plants are still known (for example DE 4138120 A1) which, by means of a lifting and slewing mechanism, respectively attach the electrode support device to the furnace vessel to be tilted. This is due to the lifting and slewing a high technical effort required. This construction has also proven to be very prone to failure in practice.
- the invention has for its object to make the use of the electrodes on a double oven without restriction from the furnace mechanics.
- a third tilting stage is provided on which the pivotable, raisable or lowerable electrode support device is arranged and that the third tilting stage in the immediate dependence of Tilting each one of the oven platforms for a furnace vessel is tilted and that the third tilting platform with the pivotable, raised or lowered electric en-carrying device is associated with its own tilting drive with a control device.
- the respective oven platform and the third tilting stage can be actuated absolutely simultaneously.
- the use of such a third tilting stage is possible, at least for a DC and AC double oven. Special advantages arise for different process steps, such as. Pig iron charging, dephosphorization, slag reduction u. like.
- the third tilting platform with the pivotable, raisable and lowerable electrode support device can be locked alternately with the respective oven platform to be tilted. This results in absolutely dependent tilting movements between the furnace platform of a furnace vessel and the third tilting platform.
- control device of its own tilting drive is formed from a synchronization device which can be connected to the control device of the respective furnace platform to be tilted.
- Another advantageous design method is further provided by the fact that the own tilting drive is formed from an arranged within the foundation piston-cylinder unit. The required space between the oven platforms for the oven vessels has not been used.
- Another measure for securing the different tilting sequences is achieved in that, when the synchronizing device is connected to the respective control device of a furnace platform to be tilted, a connection to the respective other control device for the respective other furnace platform is blocked.
- a development of the invention provides that in each of the furnace A and B associated lid pivoting device is integrated in each case an oxygen lance, wherein the combination pivoting device for lid and lance is arranged on the tiltable oven platform.
- the advantages are that for the oxygen lances no separate pivoting devices is necessary, but integrated the lances in the existing Deckelschwenkvorraumen become.
- the O 2 lances are tiltable together with the swiveling devices via the oven platform together with the ovens.
- the oven can tilt with retracted O 2 lance.
- the system is less prone to failure of an O 2 lance, as the operation in the other furnace can be continued.
- the inventive system with tiltable electrode support device and tiltable Deckelschwenkvorlegien with integrated oxygen lances is further developed advantageous that the known elaborate Deckelhubwerk is replaced by a support arm construction with hoist.
- the Cover pivoting device next to the support arm for the oxygen lance at least one further support arm, preferably two support arms, for the furnace cover and the O 2 lance cover on.
- These support arms are arranged at one end on a pivoting column.
- hydraulic lifting cylinders are arranged, which are in communication with the respective upper lid side. About this lifting cylinder, the lid can be placed on the respective oven or removed again.
- These lifting cylinders are arranged distributed over the support arms.
- a common exhaust pipe per furnace now takes over the removal of the hot gases and dusts during the melting as well as the blowing process.
- This exhaust pipe is designed in several parts.
- a pipe part which is arranged directly on the furnace cover, is designed as a pipe socket detachably formed with respect to the remaining exhaust pipe and pivotable in the decoupled state together with the furnace cover.
- this pipe socket is aligned flush with the rest of the exhaust pipe, wherein the adjoining the pipe socket exhaust pipe is tilted together with the furnace platform.
- Electrodes 6 are supplied by a furnace transformer 7 (see Fig. 2) via a high-current connection 8 through a transformer house wall 9 by means of high current cables 10.
- the electrodes 6 can be pivoted by means of a pivoting column 11 over the furnace A or the furnace B.
- the electrodes 6 are brought into a drawn in Fig. 1 upper position by a lifting column 15 in the pivoting column 11.
- this O 2 lance 13 a is located above the furnace B by means of a pivoting device 12 for the oxygen blowing lance 13 a, likewise on the furnace platform 3.
- the electrodes 6 are used by means of the lifting column 15 with a column guide and the electrode support device 16 in height to control the energy supplied. Then support arms 17 and 14 are provided for an electrode inner cover 18 and a similar inner cover 21 for the oxygen Aufblaslanzen 13 a and b.
- the electrode inner cover 18 is height adjustable by means of lifting cylinders 19 (see Fig. 2).
- an electrode adder 20 is provided. The electrode inner cover 18 is held by means of the support arms 17.
- a stationary exhaust pipe 24 with a secondary combustion chamber 25 is to be connected in the pivoted-in position.
- the exhaust gases are removed by means of an exhaust port 26.
- the furnace cover 21 is swung out in Fig. 2).
- the exhaust pipes 23, 24 and the exhaust port 26 are connected together. Between the individual components are gaps that allow corresponding furnace movements.
- the gap between tube 23 and 24 is in particular manually adjustable.
- the gap between the pipe 24 and the exhaust pipe 26 is adjustable by a sliding sleeve. By changing the air gap, the amount of suction from the furnace and the pressure in the furnace vessel is influenced and sucked for the post-combustion (and cooling) necessary amount of false air.
- the lance inner cover 21 can be adjusted by means of a lifting cylinder 33 in height.
- a third tilting stage 29 is arranged, on which the pivoting stage 11 and the electrode-Nachsetzvorides 20 are located.
- the third tilting platform 29 is located on the pivoting column 11, the pivotable, raisable and lowerable electrode support device 16 at the other end to the electrode-Nachsetzvorraum 20.
- This third tilting platform 29 is alternately locked according to a first embodiment with each to be tilted furnace platform 3.
- a second embodiment provides for the third tilting platform 29 its own tilting drive 30 (see FIG. which consists in the embodiment of a piston-cylinder unit 31 which is mounted within the foundation 1.
- the third tilting platform 29 is in accordance with FIG. 3 in the normal position, in Fig. 4 in the forward inclined position and in Fig. 5 in one of the respective furnace and Chargierlage dependent, rearwardly inclined position.
- the arrangement of the respective pivoting devices 12 for the furnace lid 5 and the O 2 inner lid 21 with integrated oxygen lance 13 a, b becomes clear.
- the O 2 -Lanzenstrom is not on the fixed furnace stage, but is integrated in the turret for the cover pan, which is arranged on the tiltable furnace platform.
- the pivoting device 12 consists of an inner central support arm 27, at the top of an O 2 lance 13 a, b is mounted, which is supplied via an oxygen line through the support arm.
- the O 2 lance 13 a, b is carried by the support arm 27, which is connected to a guide column and guided in guide rollers. The lifting movement of support arm 27 and O 2 lance 13 a, b via a hydraulic cylinder installed in the guide column.
- the pivoting device 12 further comprises two support arms 14 of the cover structure which extend over the furnace cover 5, first parallel to the central lance support arm 27, and then, when they have reached the edge of the O 2 inner cover 21, V -Disteally diverge. In this way, the support arms 14 extend over both the furnace lid and the O 2 lance inner lid.
- the support arms 27 and 14 are pivotally mounted by means of a rotary column with a roller bearing, wherein the support arm for the lance 27 and the supporting structure for the cover are pivoted together.
- the winch control of the oxygen lance is replaced by the control by means of a support arm, guide rollers and hydraulic cylinders.
- the lances 13a, b are assigned to the pivoting devices 12, the oven platform is free on the door side. This improves the view from the control room on the furnace and on the electrode-Nachsetzvorraum 20.
- the scrap basket passage and the vessel transport through the O 2 lance system are not hindered.
- the pivoting of the O 2 lance is not to be considered.
- lifting cylinder 22, 33 are arranged and that three for the furnace lid 5 and four for the lance inner lid 21. They are each arranged according to the lid edge.
- the lid or the lid are pivoted about the oven and then moved over the lifting cylinder 22, 33 by the movement of the respective piston rod in a Verschdorfposition down.
- the lifting linkage of the lifting cylinder 22 for the furnace cover 5 is decoupled in the lowered position of the cover 5, so that pivoting of the pivoting device 12 with the support arm 27 and the lance 13 and the support arm 28 with lance cover 21 at a resting on the furnace vessel 4 furnace lid 5 possible is.
- FIGS. 2 and 6 different process states of the Conarc process, in particular for the production of carbon steels and stainless steels, such as stainless steel, are shown.
- the blowing process takes place in furnace A, while at the same time the melting process with inserted electrodes 6 takes place in furnace B.
- the pivoting device 12 is above the furnace A. pivoted.
- the O 2 lance inner cover 21 and the oxygen lance 13b pivoted to the middle of the furnace.
- the furnace lid 5 is likewise located with the waste gas nozzle 26 on the furnace vessel 4 (furnace B in FIG. 6). With the pivoting device 12, the lance 13 a and the lance inner cover 21 are swung out. The electrode arm is pivoted to middle furnace B.
- the electrode pivoting device is likewise composed of a support arm construction, wherein the electrode inner cover 18 can be arranged in the cover heart via lifting cylinders 19 positioned along the support arms 17. Within the substantially rectangular designed support arm construction three electrode support arms 16 are formed, at the ends of the electrodes 6 are attached.
- the illustrated state of the furnace A of FIG. 2 corresponds to the state of the furnace B of FIG. 6.
- Furnace B of FIG. 2 shows the state of the furnace completely open.
- both the furnace lid 5 - with the exhaust nozzle 26 attached thereto - and the O 2 lance inner lid 21 are pivoted together with the lance 13 a.
- the use of the third tilting platform 29 is possible with DC or AC double ovens.
- the design is particularly advantageous in a CONARC double-oven plant, in the different process steps, such as pig iron charging, dephosphorization, slag reduction u. Like. Be performed to apply.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
Die Erfindung betrifft eine Doppelofenanlage für die Erzeugung von Stahlwerkstoffen durch wechselweises Chargieren von eisenhaltigen Einsatzstoffen, Sauerstoff-Aufblasen und Lichtbogen-Aufschmelzen jeweils mittels eines Ofens A und eines Ofens B, die auf jeweils einer kippbaren Ofenbühne angeordnet sind und mit einer zwischen den Öfen A und B angeordneten Schwenksäule, an der eine heb- und senkbare Elektroden-Tragvorrichtung befestigt ist und mit einer Schwenkvorrichtung für zumindest eine Sauerstoff-Aufblaslanze.The invention relates to a double furnace plant for the production of steel materials by alternately charging iron-containing feedstocks, oxygen inflation and arc melting respectively by means of a furnace A and a furnace B, which are each arranged on a tiltable furnace platform and with a between the furnaces A and B arranged pivot column to which a raisable and lowerable electrode support device is attached and with a pivoting device for at least one oxygen Aufblaslanze.
Eine derartige Doppel-Elektrolichtbogenofen-Anlage ist aus der DE 44 34 369 und aus der EP 0 717 115 B1 bekannt. Es ist davon auszugehen, dass die beiden Ofengefäße auf jeweils einer getrennten Kippbühne angeordnet sind. Zwischen diesen beiden Kippbühnen ist auf der festen Ofenbühne die schwenkbare, heb-und senkbare Elektroden-Tragvorrichtung vorgesehen. Dadurch kann wechsel- ° weise in zwei Ofengefäßen der Schrott aufgeschmolzen werden. Während demnach in einem Ofengefäß mittels der schwenkbaren, heb- und senkbaren Elektroden-Tragarme elektrische Energie in die Schmelze eingebracht wird, kann am zweiten Ofengefäß der Abstich erfolgen und Schrott für die nächste Schmelze eingebracht werden. Bei der aus der DE 44 34 369 bekannten Anlage ist beiden Öfen eine gemeinsame nicht kippbare Lanzeneinrichtung zugeordnet.Such a double electric arc furnace plant is known from DE 44 34 369 and EP 0 717 115 B1. It can be assumed that the two furnace vessels are each arranged on a separate tilting platform. Between these two tilting stages, the pivotable, raisable and lowerable electrode support device is provided on the fixed oven platform. As a result, the scrap can be melted alternately in two furnace vessels. Accordingly, while electrical energy is introduced into the melt in a furnace vessel by means of the pivotable, liftable and lowerable electrode support arms, the tapping can take place at the second furnace vessel and scrap can be introduced for the next melt. In the system known from DE 44 34 369 two ovens a common non-tilting lance device is assigned.
Bei einer sog. CONARC-Doppelofen-Anlage (CONARC ist eine geschützte Marke der Fa. SMS Demag AG) kann während des Einsatzes der Elektroden im ersten Gefäß zum Einschmelzen im zweiten Gefäß eine Sauerstoff-Lanze, z.B. in Form einer Toplanze, eingesetzt werden.In a so-called CONARC double oven plant (CONARC is a registered trademark of Messrs. SMS Demag AG), during the use of the electrodes in the first vessel for melting in the second vessel, an oxygen lance, e.g. in the form of a top lance, are used.
Bei dieser bekannten Anordnung hat sich als weniger günstig ergeben, dass die Elektroden-Tragvorrichtung nicht gleichzeitig mit der jeweiligen Kippbühne und dem betreffenden Ofengefäß gekippt werden kann. Sofern der Einsatz der Elektroden auch in einer gekippten Stellung des Ofengefäßes zweckmäßig ist, fehlt es an den notwendigen Voraussetzungen. Im allgemeinen muss die ElektrodenDurchführung eine übergroße Öffnung besitzen. Weiter ist zu beachten, dass das Durchfahren der Elektroden durch den Ofendeckel einen möglichst geringen Weg erfordert. Ein geringer Weg wird dabei im allgemeinen durch die Einplanung von Rollen- und Kurvenwiegen erreicht. Der Einsatz solcher Wiegen ist allerdings mit hohem technischem Aufwand verbunden. Ferner treten große Kräfte an der Kolben-Zylinder-Einheit beim Kippen des ausgemauerten und chargierten Ofengefäßes auf. Weiter unterliegen Rollen- und Kurvenwiegen einem hohen Verschleiß. Der Austausch von Rollen und Schienen ist ebenfalls mit hohen Kosten und langen Ausfallzeiten der Produktionsanlage verbunden. Unter Zuhilfenahme aller dieser Maßnahmen ist der erreichbare Kippwinkel allenfalls mit ca. ± 3° anzusetzen.In this known arrangement has proved to be less favorable that the electrode support device can not be tilted simultaneously with the respective tilting stage and the respective furnace vessel. If the use of the electrodes in a tilted position of the furnace vessel is appropriate, it lacks the necessary conditions. In general, the leadthrough must have an oversized opening. It should also be noted that the passage of the electrodes through the furnace lid requires the least possible path. A small way is generally achieved through the scheduling of roll and curve weighing. However, the use of such cradles is associated with high technical complexity. Furthermore, large forces occur on the piston-cylinder unit during tilting of the bricked and charged furnace vessel. Furthermore, roller and curve weighing are subject to high wear. The replacement of rollers and rails is also associated with high costs and long downtime of the production plant. With the help of all these measures, the achievable tilt angle can only be set at approx. ± 3 °.
Es sind noch Doppelofen-Anlagen bekannt (Z.B. DE 4138120 A1) die mit Hilfe eines Hub- und Schwenkwerks die Elektroden-Tragvorrichtung jeweils an das zu kippende Ofengefäß anhängen. Dazu ist durch das Hub- und Schwenkwerk ein hoher technischer Aufwand erforderlich. Diese Bauweise hat sich in der Praxis zudem als sehr störanfällig erwiesen.Double oven plants are still known (for example DE 4138120 A1) which, by means of a lifting and slewing mechanism, respectively attach the electrode support device to the furnace vessel to be tilted. This is due to the lifting and slewing a high technical effort required. This construction has also proven to be very prone to failure in practice.
Der Erfindung liegt die Aufgabe zugrunde, den Einsatz der Elektroden an einem Doppelofen ohne Einschränkung von Seiten der Ofenmechanik zu gestalten.The invention has for its object to make the use of the electrodes on a double oven without restriction from the furnace mechanics.
Die gestellte Aufgabe wird bei der eingangs bezeichneten Doppelofen-Anlage erfindungsgemäß dadurch gelöst, dass zwischen den beiden kippbaren Ofenbühnen eine dritte Kippbühne vorgesehen ist, auf der die schwenkbare, heb- oder senkbare Elektroden-Tragvorrichtung angeordnet ist und dass die dritte Kippbühne in unmittelbarer Abhängigkeit der Kippbewegungen jeweils einer der Ofenbühnen für ein Ofengefäß kippbar ist und dass der dritten Kippbühne mit der schwenkbaren, heb- oder senkbaren Elektro en-Tragvorrichtung ein eigener Kippantrieb mit einer Steuereinrichtung zugeordnet ist. Dadurch kann auch bei einem gekippten Ofengefäß mit den Elektroden ungestörter gearbeitet werden, was besonders bei den im Doppelofen- oder CONARC-Verfahren betriebenen Prozessschritte von großem Vorteil ist. Dadurch können auch die jeweilige Ofenbühne und die dritte Kippbühne absolut gleichzeitig betätigt werden. Der Einsatz einer solchen dritten Kippbühne ist zumindest bei einem DC-und AC-Doppelofen möglich. Besondere Vorteile ergeben sich für unterschiedliche Verfahrensschritte, wie bspw. Roheisen-Chargieren, Entphosphorung, Schlackenreduzieren u. dgl.The above object is achieved in the above-mentioned double oven system according to the invention that between the two tiltable furnace platforms, a third tilting stage is provided on which the pivotable, raisable or lowerable electrode support device is arranged and that the third tilting stage in the immediate dependence of Tilting each one of the oven platforms for a furnace vessel is tilted and that the third tilting platform with the pivotable, raised or lowered electric en-carrying device is associated with its own tilting drive with a control device. As a result, it is possible to work more undisturbed with the electrodes even with a tilted furnace vessel, which is of great advantage, particularly in the process steps operated in the double furnace or CONARC process. As a result, the respective oven platform and the third tilting stage can be actuated absolutely simultaneously. The use of such a third tilting stage is possible, at least for a DC and AC double oven. Special advantages arise for different process steps, such as. Pig iron charging, dephosphorization, slag reduction u. like.
Eine Ausgestaltung besteht darin, dass die dritte Kippbühne mit der schwenkbaren, heb- und senkbaren Elektroden-Tragvorrichtung wechselweise mit der jeweils zu kippenden Ofenbühne verriegelbar ist. Dadurch entstehen absolut abhängige Kippbewegungen zwischen der Ofenbühne eines Ofengefäßes und der dritten Kippbühne.One embodiment is that the third tilting platform with the pivotable, raisable and lowerable electrode support device can be locked alternately with the respective oven platform to be tilted. This results in absolutely dependent tilting movements between the furnace platform of a furnace vessel and the third tilting platform.
Weiterhin besteht für die vorstehende Gestaltungsweise der Vorschlag, dass die Steuereinrichtung des eigenen Kippantriebs aus einer Gleichlaufeinrichtung gebildet ist, die an die Steuereinrichtung der jeweiligen zu kippenden Ofenbühne anschließbar ist.Furthermore, there is for the above design of the proposal that the control device of its own tilting drive is formed from a synchronization device which can be connected to the control device of the respective furnace platform to be tilted.
Eine andere vorteilhafte Gestaltungsweise ist ferner dadurch geschaffen, dass der eigene Kippantrieb aus einer innerhalb des Fundaments angeordneten Kolben-Zylinder-Einheit gebildet ist. Der dafür benötigte Raum zwischen den Ofenbühnen für die Ofengefäße ist bisher nicht genutzt worden.Another advantageous design method is further provided by the fact that the own tilting drive is formed from an arranged within the foundation piston-cylinder unit. The required space between the oven platforms for the oven vessels has not been used.
Eine weitere Maßnahme zur Sicherung der unterschiedlichen Kippabläufe wird dadurch erzielt, dass bei bestehender Verbindung der Gleichlaufeinrichtung mit der jeweiligen Steuereinrichtung einer zu kippenden Ofenbühne eine Verbindung zu der jeweils anderen Steuereinrichtung für die jeweils andere Ofenbühne gesperrt ist.Another measure for securing the different tilting sequences is achieved in that, when the synchronizing device is connected to the respective control device of a furnace platform to be tilted, a connection to the respective other control device for the respective other furnace platform is blocked.
Eine Weiterbildung der Erfindung sieht vor, dass in die jeweils dem Ofen A und B zugeordnete Deckelschwenkvorrichtung jeweils eine Sauerstoff-Lanze integriert ist, wobei die Kombi-Schwenkvorrichtung für Deckel und Blaslanze auf der kippbaren Ofenbühne angeordnet ist.A development of the invention provides that in each of the furnace A and B associated lid pivoting device is integrated in each case an oxygen lance, wherein the combination pivoting device for lid and lance is arranged on the tiltable oven platform.
Obwohl für dieses Lay-out der Anlage eine zusätzliche O2-Lanze mit Lanzenführung und O2-Zuleitung vorgesehen werden muss, liegen die Vorteile darin, dass für die Sauerstoff-Lanzen keine separaten Schwenkvorrichtungen notwendig ist, sondern die Lanzen in die bestehenden Deckelschwenkvorrichtungen integriert werden. Gleichzeitig und dies ist ein besonderer Vorteil, sind die O2-Lanzen zusammen mit den Schwenkvorrichtungen über die Ofenbühne zusammen mit den Öfen kippbar. Somit kann der Ofen mit eingefahrener O2-Lanze kippen. Zudem ist die Anlage weniger anfällig bei Ausfall einer O2-Lanze, da der Betrieb im anderen Ofen fortgesetzt werden kann.Although an additional O 2 lance with Lanzenführung and O 2 supply line must be provided for this layout of the plant, the advantages are that for the oxygen lances no separate pivoting devices is necessary, but integrated the lances in the existing Deckelschwenkvorrichtungen become. At the same time and this is a particular advantage, the O 2 lances are tiltable together with the swiveling devices via the oven platform together with the ovens. Thus, the oven can tilt with retracted O 2 lance. In addition, the system is less prone to failure of an O 2 lance, as the operation in the other furnace can be continued.
Die erfindungsgemäße Anlage mit kippbarer Elektroden-Tragvorrichtung und kippbaren Deckelschwenkvorrichtungen mit integrierten Sauerstoff-Lanzen wird dadurch vorteilhaft weitergebildet, dass das bekannte aufwendige Deckelhubwerk durch eine Tragarm-Konstruktion mit Hubwerk ersetzt wird. Im Einzelnen weist die Deckelschwenkvorrichtung neben dem Tragarm für die Sauerstoff-Lanze mindestens einen weiteren Tragarm, vorzugsweise zwei Tragarme, für den Ofendeckel und den O2-Lanzendeckel auf. Diese Tragarme sind an ihrem einen Ende an einer Schwenksäule angeordnet. An dem anderem Ende, das sich über die Deckel erstreckt, sind hydraulische Hubzylinder angeordnet, die in Verbindung mit der jeweiligen Deckeloberseite stehen. Über diese Hubzylinder können die Deckel auf den jeweiligen Ofen abgesetzt bzw. wieder entfernt werden. Diese Hubzylinder sind über die Tragarme verteilt angeordnet.The inventive system with tiltable electrode support device and tiltable Deckelschwenkvorrichtungen with integrated oxygen lances is further developed advantageous that the known elaborate Deckelhubwerk is replaced by a support arm construction with hoist. In detail, the Cover pivoting device next to the support arm for the oxygen lance at least one further support arm, preferably two support arms, for the furnace cover and the O 2 lance cover on. These support arms are arranged at one end on a pivoting column. At the other end, which extends over the lid, hydraulic lifting cylinders are arranged, which are in communication with the respective upper lid side. About this lifting cylinder, the lid can be placed on the respective oven or removed again. These lifting cylinders are arranged distributed over the support arms.
Weiterhin wird die Anlage durch eine vorteilhafte Abgasanlage weitergebildet. Vom Grundgedanken her übernimmt nunmehr ein gemeinsame Abgasleitung pro Ofen den Abtransport der heißen Gase und Stäube beim Schmelz- wie beim Blasprozess. Diese Abgasleitung ist mehrteilig ausgebildet. Ein Rohrteil, das unmittelbar auf dem Ofendeckel angeordnet ist, ist als Rohrstutzen lösbar gegenüber dem restlichen Abgasrohr ausgebildet und im entkoppelten Zustand zusammen mit dem Ofendeckel verschwenkbar. Wenn der Ofendeckel auf den Ofen verschwenkt ist, fluchtet dieser Rohrstutzen bündig mit dem restlichen Abgasrohr, wobei das an den Rohrstutzen anschließende Abgasrohr zusammen mit der Ofenbühne kippbar ist. Dies hat den Vorteil, dass auf wenig aufwendige Art und Weise das Ofengefäß zum Chrargieren geöffnet werden kann und nur ein Teil des Rohrkrümmers verschwenkt werden muss.Furthermore, the system is further developed by an advantageous exhaust system. From the basic idea, a common exhaust pipe per furnace now takes over the removal of the hot gases and dusts during the melting as well as the blowing process. This exhaust pipe is designed in several parts. A pipe part, which is arranged directly on the furnace cover, is designed as a pipe socket detachably formed with respect to the remaining exhaust pipe and pivotable in the decoupled state together with the furnace cover. When the furnace lid is pivoted onto the furnace, this pipe socket is aligned flush with the rest of the exhaust pipe, wherein the adjoining the pipe socket exhaust pipe is tilted together with the furnace platform. This has the advantage that the furnace vessel can be opened for Chrargieren in a less expensive way and only a part of the elbow must be pivoted.
Insgesamt ergibt sich eine Anlage, die im Vergleich zum Stand der Technik eine weniger kostenintensive Ausführung des Deckelhubwerks und der Absaugkrümmerhubvorrichtung zeigt, die angehoben werden muss. Das Kippen durch die Ofenbühne ist hierbei weniger kostenintensiv als das Kippen mittels einer Rollenwiege. Zudem kann die Kühlwasserversorgung zum Ofendeckel wesentlich betriebssicherer und kostengünstiger ausgeführt werden, weil eine günstige Anordnung der Kühlwasserleitungen zum Ofendeckel möglich ist. Die Herstellungskosten der Gesamtanlage werden insgesamt reduziert, wobei gleichzeitig die Betriebssicherheit und die Flexibilität der Anlage erhöht werden. Auch wird die Möglichkeit verbessert, das Anlagenkonzept in bestehende Hallen einzuplanen.Overall, a system results, which shows a less costly design of the Deckelhubwerks and Absaugkrümmerhubvorrichtung compared to the prior art, which must be raised. Tilting through the furnace platform is less costly than tilting by means of a roller cradle. In addition, the cooling water supply to the furnace lid can be made much more reliable and cheaper, because a favorable arrangement of the cooling water pipes to the furnace lid is possible. The manufacturing costs of the entire system are reduced overall, while the reliability and the flexibility of the plant can be increased. It also improves the possibility of scheduling the plant concept in existing halls.
In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachfolgend näher erläutert werden.In the drawings, embodiments of the invention are shown, which are explained in more detail below.
Es zeigen:
- Fig. 1
- einen Aufriss einer Doppelofen-Anlage,
- Fig. 2
- die zu Fig. 1 gehörende Draufsicht auf die Doppelofen-Anlage, mit einem vom Ofengefäß B weggeschwenkten Ofendeckel,
- Fig. 3
- die dritte Kippbühne in Normalstellung in der Seitenansicht,
- Fig. 4
- die dritte Kippbühne in der nach hinten gekippten Stellung,
- Fig. 5
- die dritte Kippbühne in einer nach vorne gekippten Stellung,
- Fig. 6
- eine zu Fig. 1 gehörende Draufsicht auf die Doppelofen-Anlage in einer anderen Betriebsposition und
- Fig. 7
- eine Draufsicht auf die Elektroden-Tragvorrichtung mit Nachsetzvorrichtung.
- Fig. 1
- an elevation of a double oven plant,
- Fig. 2
- 1 belonging to the plan view of the double oven plant, with a weggeschwenkten from the furnace vessel B furnace lid,
- Fig. 3
- the third tilting stage in normal position in side view,
- Fig. 4
- the third tilting stage in the tilted back position,
- Fig. 5
- the third tilting stage in a forward tilted position,
- Fig. 6
- a belonging to Fig. 1 plan view of the double oven plant in a different operating position and
- Fig. 7
- a plan view of the electrode support device with Nachsetzvorrichtung.
Auf Fundamenten 1 sind für einen Ofen A und einen gleichen Ofen B einer Elektrolichtbogen-Doppelofen-Anordnung mittels eines Unterbaus 2 jeweils eine kippbare Ofenbühne 3 für jeweils ein Ofengefäß 4 mit einem Ofendeckel 5 angeordnet (vgl. Fig. 1). Elektroden 6 werden von einem Ofentransformator 7 ( vgl. Fig. 2) über eine Hochstromverbindung 8 durch eine Transformatoren-Hauswand 9 mittels Hochstromseilen 10 versorgt. Die Elektroden 6 können mittels einer Schwenksäule 11 über den Ofen A oder den Ofen B geschwenkt werden.On foundations 1 for a furnace A and a same furnace B of an electric arc double furnace arrangement by means of a
Dazu werden die Elektroden 6 in eine in Fig. 1 gezeichnete obere Stellung durch eine Hubsäule 15 in der Schwenksäule 11 gebracht. In dieser Zeit befindet sich mittels einer ebenfalls auf der Ofenbühne 3 stehenden Schwenkvorrichtung 12 für die Sauerstoff-Aufblaslanze 13a diese O2-Lanze 13a über dem Ofen B.For this purpose, the
Die Elektroden 6 werden mittels der Hubsäule 15 mit einer Säulenführung und der Elektroden-Tragvorrichtung 16 in ihrer Höhe zur Regelung der zugeführten Energie eingesetzt. Sodann sind Tragarme 17 und 14 für einen Elektroden-Innendeckel 18 bzw. einen ähnlichen Innendeckel 21 für die Sauerstoff-Aufblaslanzen 13a und b vorgesehen. Der Elektroden-Innendeckel 18 ist mittels Hubzylindern 19 höheneinstellbar (vgl. Fig. 2). Außerdem ist eine Elektroden-Nachsetzvorrichtung 20 vorhanden. Der Elektroden-Innendeckel 18 ist mittels der Tragarme 17 gehalten.The
An das mit der Kippbühne 3 verbundene Abgasrohr 23 ist bei eingeschwenkter Lage ein ortsfestes Abgasrohr 24 mit einer Nachbrennkammer 25 anzuschließen. Vom Ofen B aus werden die Abgase mittels eines Abgasstutzens 26 abgeführt. (Der Ofendeckel 21 ist in Fig. 2 ausgeschwenkt). Die Abgasrohre 23, 24 und der Abgasstutzen 26 werden miteinander verbunden. Zwischen den einzelnen Bauteilen sind Spalte, die entsprechende Ofenbewegungen zulassen. Der Spalt zwischen Rohr 23 und 24 ist insbesondere manuell einstellbar. Der Spalt zwischen Rohr 24 und dem Abgasstutzen 26 ist durch eine Schiebemuffe verstellbar. Über die Veränderung des Luftspaltes wird die Absaugmenge aus dem Ofen und der Druck im Ofengefäß beeinflusst sowie die für die Nachverbrennung (und Kühlung) notwendige Falschluftmenge angesaugt. Der Blaslanzen-Innendeckel 21 kann mittels eines Hubzylinders 33 in der Höhe eingestellt werden.To the
Zwischen den Ofenbühnen 3 der Öfen A und B ist eine dritte Kippbühne 29 angeordnet, auf der sich die Schwenkbühne 11 und die Elektroden-Nachsetzvorrichtung 20 befinden. Auf der dritten Kippbühne 29 befindet sich an der Schwenksäule 11 die schwenkbare, heb- und senkbare Elektroden-Tragvorrichtung 16 am anderen Ende zur Elektroden-Nachsetzvorrichtung 20. Diese dritte Kippbühne 29 ist wechselweise nach einer ersten Ausführungsform mit der jeweils zu kippenden Ofenbühne 3 verriegelt. Eine zweite Ausführungsform sieht für die dritte Kippbühne 29 einen eigenen Kippantrieb 30 ( vgl. Fig. 3) vor, der im Ausführungsbeispiel aus einer Kolben-Zylinder-Einheit 31 besteht, die innerhalb des Fundaments 1 gelagert ist.Between the
Die dritte Kippbühne 29 befindet sich gemäß Fig. 3 in Normalstellung, in Fig. 4 in nach vorne geneigter Stellung und in Fig. 5 in einer von der jeweiligen Ofen- und Chargierlage abhängigen, nach hinten geneigter Stellung.The
Aus den beiden Fig. 2 und 6 wird die Anordnung der jeweiligen Schwenkvorrichtungen 12 für die Ofendeckel 5 und die O2-Innendeckel 21 mit integrierter Sauerstoff-Lanze 13a, b deutlich. Die Kombi-Schwenkvorrichtung 12 weist neben der Funktion des Deckelverschwenkens ebenfalls die Funktion auf, die Lanze zum Einblasen von Sauerstoff 13a, b zur Ofenmitte zu bringen. Die O2-Lanzenanlage steht nicht auf der festen Ofenbühne, sondern ist in dem Drehturm für das Deckelschwenken integriert, der auf der kippbaren Ofenbühne 3 angeordnet ist. Im Einzelnen besteht die Schwenkvorrichtung 12 aus einem inneren mittigen Tragarm 27, an dessen Spitze eine O2-Lanze 13a, b angebracht ist, die über eine Sauerstoff-Leitung durch den Tragarm versorgt wird. Die O2-Lanze 13a, b wird von dem Tragarm 27 getragen, der mit einer Führungssäule verbunden ist und in Führungsrollen geführt ist. Die Hubbewegung von Tragarm 27 und O2-Lanze 13a, b erfolgt über einen in die Führungssäule eingebauten Hydraulikzylinder.From the two FIGS. 2 and 6, the arrangement of the
Die Schwenkvorrichtung 12 umfasst des Weiteren zwei Tragarme 14 des Deckel-Tragwerks, die sich über den Ofendeckel 5 erstrecken und zwar zuerst parallel zu dem mittigen Lanzen-Tragarm 27, um dann, wenn sie den Rand des O2-Innendeckels 21 erreicht haben, V-förmig auseinanderzulaufen. Auf diese Weise erstrecken sich die Tragarme 14 sowohl über den Ofendeckel als auch über den O2-Lanzen-Innendeckel.The pivoting
Die Tragarme 27 und 14 sind mittels einer Drehsäule mit einem Rollenlager schwenkbar gelagert, wobei der Tragarm für die Lanze 27 und das Tragwerk für die Deckel gemeinsam verschwenkt werden.The
Im Vergleich zu herkömmlichen Anlagen wird hierbei die Seilwindenregelung der Sauerstoff-Lanze durch die Regelung mittels Tragarm, Führungsrollen und Hydraulikzylindern ersetzt. Indem die Lanzen 13a, b den Schwenkvorrichtungen 12 zugeordnet werden, wird die Ofenbühne türseitig frei. Hierdurch verbessert sich die Sicht vom Leitstand auf die Ofenanlage und auf die Elektroden-Nachsetzvorrichtung 20. Die Schrottkorbdurchfahrt und der Gefäßtransport durch die O2-Lanzenanlage werden nicht behindert. Bei dem Auslegen der Hallenbreite beim Bau einer neuen Anlage ist das Schwenken der O2-Lanze nicht zu berücksichtigen.In comparison to conventional systems, the winch control of the oxygen lance is replaced by the control by means of a support arm, guide rollers and hydraulic cylinders. By the
Entlang der Tragarme 14 sind Hubzylinder 22, 33 angeordnet und zwar drei für den Ofendeckel 5 und vier für den Lanzen-Innendeckel 21. Sie sind jeweils entsprechend des Deckelrandes angeordnet. Der Deckel bzw. die Deckel werden über den Ofen geschwenkt und dann über die Hubzylinder 22, 33 durch die Bewegung der jeweiligen Kolbenstange in eine Verschließposition nach unten verfahren. Das Hubgestänge des Hubzylinders 22 für den Ofendeckel 5 ist in der abgesenkten Position vom Deckel 5 entkoppelt, sodass ein Schwenken der Schwenkvorrichtung 12 mit dem Tragarm 27 und der Lanze 13 und dem Tragarm 28 mit Lanzendeckel 21 bei einem auf dem Ofengefäß 4 aufliegendem Ofendeckel 5 möglich ist.Along the
Mit Hilfe der Fig. 2 und 6 werden unterschiedliche Prozesszustände des Conarc-Verfahrens, insbesondere zur Produktion von Kohlenstoffstählen und Edelstählen, wie Rostfreistahl, dargestellt. Gemäß Fig. 6 läuft in Ofen A der Blasprozess ab, während zeitgleich im Ofen B der Schmelzprozess mit eingesetzten Elektroden 6 stattfindet. Für den Blasprozess ist die Schwenkvorrichtung 12 über den Ofen A geschwenkt. Mit ihr bzw. dem Tragwerk (14) für den Deckel 5 bzw. dem Tragarm 27 für die Lanze 13b ist der Ofendeckel 5 mit Abgasstutzen 26, der O2-Lanzen-Innendeckel 21 sowie die Sauerstoff-Lanze 13b auf Ofenmitte eingeschwenkt.With reference to FIGS. 2 and 6, different process states of the Conarc process, in particular for the production of carbon steels and stainless steels, such as stainless steel, are shown. According to FIG. 6, the blowing process takes place in furnace A, while at the same time the melting process with inserted
Während des Schmelzprozesses liegt ebenfalls der Ofendeckel 5 mit dem Abgasstutzen 26 auf dem Ofengefäß 4 (in Fig. 6 der Ofen B) auf. Mit der Schwenkvorrichtung 12 sind die Lanze 13a und der Lanzen-Innendeckel 21 ausgeschwenkt. Der Elektrodenarm ist auf Mitte Ofen B verschwenkt.During the melting process, the
Die Elektrodenschwenkvorrichtung setzt sich ebenfalls aus einer Tragarm-Konstruktion zusammen, wobei der Elektroden-Innendeckel 18 über entlang der Tragarme 17 positionierte Hubzylinder 19 im Deckelherz angeordnet werden kann. Innerhalb der als im Wesentlichen rechteckig ausgebildeten Tragarm-Konstruktion sind drei Elektrodentragarme 16 ausgebildet, an deren Enden die Elektroden 6 befestigt sind.The electrode pivoting device is likewise composed of a support arm construction, wherein the electrode
Der gezeigte Zustand des Ofens A der Fig. 2 entspricht dem Zustand des Ofens B der Fig. 6. Ofen B der Fig. 2 zeigt den Zustand des vollkommen geöffneten Ofens. Mittels der Schwenkvorrichtung 12 bzw. dem Tragwerk ist sowohl der Ofendeckel 5 - mit daran befestigtem Abgasstutzen 26 - als auch der O2-Lanzen-lnnendeckel 21 zusammen mit der Lanze 13a verschwenkt.The illustrated state of the furnace A of FIG. 2 corresponds to the state of the furnace B of FIG. 6. Furnace B of FIG. 2 shows the state of the furnace completely open. By means of the pivoting
Zum Nachsetzen der Elektroden 6, die aufgrund des Abbrandes der Elektrodenspitzen ein Stück nach unten gefahren werden müssen, werden die Elektroden 6 mit der Schwenksäule 11 auf eine mittige Nachsetzvorrichtung 20 (vgl. Fig. 7) geschwenkt, die sich bei der gezeigten Anlage zwischen den beiden Öfen A und B befindet.In order to readjust the
Der Einsatz der dritten Kippbühne 29 ist bei DC- oder AC-Doppelöfen möglich. Besonders vorteilhaft ist die Bauweise jedoch bei einer CONARC-Doppelofen-Anlage, in der unterschiedliche Verfahrensschritte, wie Roheisen-Chargieren, Entphosphorung, Schlackereduktion u. dgl. durchgeführt werden, anzuwenden.The use of the
- AA
- Ofen AOven A
- BB
- Ofen BOven B
- 11
- Fundamentefoundations
- 22
- Unterbausubstructure
- 33
- kippbare Ofenbühne oder Kipprahmentiltable oven platform or tilting frame
- 44
- Ofengefäßfurnace vessel
- 55
- Ofendeckelfurnace cover
- 66
- Elektrodenelectrodes
- 77
- Ofentransformatorfurnace transformer
- 88th
- HochstromverbindungHigh current connection
- 99
- Transformatoren-Hauswand (Trafohauswand)Transformers house wall (Transformer house wall)
- 1010
- Hochstromseile bzw. HochstromkabelHigh current cables or high current cables
- 1111
- Schwenksäule für Elektrodentragarme und Elektroden-InnendeckelPivoting column for electrode support arms and electrode inner lids
- 1212
- Schwenkvorrichtung für die Blaslanze, den Ofendeckel und den Lanzen-InnendeckelSwivel device for the lance, the furnace lid and the lance inner lid
- 1313
- Blaslanzen (a+b)Blow lances (a + b)
- 1414
- Tragarme für den Ofendeckel und den Lanzen-InnendeckelSupport arms for the furnace lid and the lance inner lid
- 1515
- Hubsäule für die ElektrodentragarmeLifting column for the electrode support arms
- 1616
- Elektroden-Tragvorrichtung, ElektrodentragarmeElectrode support device, electrode support arms
- 1717
- Tragarme für den Elektroden-InnendeckelSupport arms for the electrode inner cover
- 1818
- Elektroden-InnendeckelElectrode inner cover
- 1919
- Hubzylinder für den Elektroden-InnendeckelLifting cylinder for the electrode inner lid
- 2020
- Elektroden-NachsetzvorrichtungElectrode slipping device
- 2121
- Ofendeckelfurnace cover
- 2222
- Hubzylinder für den OfendeckelLifting cylinder for the furnace lid
- 2323
- Abgasrohr auf dem KipprahmenExhaust pipe on the tipping frame
- 2424
- ortsfestes Abgasrohr bzw. Abgasrohr zur Nachbrennkammerstationary exhaust pipe or exhaust pipe to Nachbrennkammer
- 2525
- Nachbrennkammerafterburner chamber
- 2626
- Abgasstutzenflue outlet
- 2727
- Tragarm für die BlaslanzeSupport arm for the lance
- 2828
- Tragarm für den Lanzen-InnendeckelSupport arm for the lance inner lid
- 2929
- dritte Kippbühne bzw. dritter Kipprahmenthird tilting platform or third tilting frame
- 3030
- eigener Kippantrieb bzw. eigener Antrieb zum dritten Kipprahmenown tilting drive or own drive to the third tilting frame
- 3131
- Kolben-Zylinder-Einheit bzw. KippzylinderPiston-cylinder unit or tilt cylinder
- 3232
- Hubsäule für den Tragarm der BlaslanzeLifting column for the support arm of the lance
- 3333
- Hubzylinder für den Lanzen-InnendeckelLifting cylinder for the lance inner lid
Claims (9)
- Twin-furnace plant for production of steel materials by alternate charging of batch materials containing iron, oxygen top blowing and arc smelting in each instance by means of a furnace A and a furnace B, which are each arranged on a respective tippable furnace platform (3), and with a raisable and lowerable electrode carrier device (16), which is arranged between the furnaces A and B, and a pivot device for at least one oxygen lance, wherein provided between the two tippable furnace platforms (3) is a third tipping platform (29) on which the pivotable, raisable and lowerable electrode carrier device (16) is arranged, and that the third tipping platform (29) is tippable in direct dependence on the tipping movements of a respective one of the furnace platforms (3) for a furnace vessel (4), wherein an own tipping drive (30) with a control device is associated with the third tipping platform (29) with the pivotable, raisable and lowerable electrode carrier device (16).
- Twin-furnace plant according to claim 1, characterised in that the third tipping platform (29) together with the pivotable, raisable and lowerable electrode carrier device (16) is alternately lockable with the respective furnace platform (3) to be tipped.
- Twin-furnace plant according to claim 1, characterised in that the control device of the own tipping drive (30) is formed from a synchronising device connectible with the control device of the respective furnace platform (3) to be tipped.
- Twin-furnace plant according to one of claims 1 and 3, characterised in that the own tipping drive (30) is formed from a piston-cylinder unit (31) arranged within the foundation (1).
- Twin-furnace plant according to one of claims 1, 3 and 4, characterised in that when the synchronising device is connected with the respective control device of a furnace platform (3) to be tipped a connection with the respective other control device for the respective other furnace platform (3) is blocked.
- Twin-furnace plant according to one of claims 1 to 5, characterised by a cover pivot device for each furnace A and B, in which in each instance the pivot device for the oxygen lance (13a, 13b) is integrated, wherein the common pivot device (12) is arranged on the tippable furnace platform (3).
- Twin-furnace plant according to claim 6, characterised in that the common pivot device (12) comprises a support structure for the furnace cover (5) and the oxygen lance cover (21) and a support arm (27), which is integrated therein, for the oxygen lance (13a, b) and that the electrode carrier device (16) has a support structure for the electrodes (6) and the electrode inner cover (18).
- Twin-furnace plant according to claim 7, characterised in that the cover support structure and the electrode support structure have stroke cylinders (19, 22, 32), which are arranged to be distributed in correspondence with the geometric extent of the furnace cover (5), the oxygen lance cover (21) and the electrode inner cover (18) over the support arms (14, 17) forming the support structure and by way of which the respective covers are movable from an elevated pivot position to a lowered furnace closing position and from which the covers can be uncoupled.
- Twin-furnace plant according to one of claims 1 to 8, characterised in that a waste gas duct through which waste gas is conducted away from the furnace during the smelting process or during the oxygen top blowing process is associated with each furnace (A, B) and that the waste gas duct is of multi-part construction, wherein a waste gas pipe (23) connected with the tipping platform (3) is connectible, in a pivoted-in position, with a afterburner chamber (25) by way of a stationary waste gas pipe (24) and that a waste gas stub pipe (26), which is arranged on the furnace cover (5), is constructed to be detachable relative to the waste gas pipe (23) and in the uncoupled state is pivotable together with the furnace cover (5).
Applications Claiming Priority (4)
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DE10237974 | 2002-08-20 | ||
DE10237974 | 2002-08-20 | ||
DE10332866 | 2003-07-19 | ||
DE10332866A DE10332866A1 (en) | 2002-08-20 | 2003-07-19 | Double furnace system for the production of steel materials |
Publications (2)
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EP1391523A1 EP1391523A1 (en) | 2004-02-25 |
EP1391523B1 true EP1391523B1 (en) | 2006-05-24 |
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EP03018545A Expired - Lifetime EP1391523B1 (en) | 2002-08-20 | 2003-08-18 | Twin-furnaces unit for steel production |
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EP (1) | EP1391523B1 (en) |
AT (1) | ATE327348T1 (en) |
DE (1) | DE50303443D1 (en) |
ES (1) | ES2265539T3 (en) |
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EP2136172A1 (en) * | 2008-06-17 | 2009-12-23 | Siemens Aktiengesellschaft | Arc furnace |
CN109441089A (en) * | 2018-11-05 | 2019-03-08 | 中国恩菲工程技术有限公司 | For the convertible operating platform before anode furnace |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH01314888A (en) * | 1988-06-14 | 1989-12-20 | Kawasaki Steel Corp | Twin-vessel type electric furnace facility |
DE4138120A1 (en) * | 1991-11-19 | 1993-05-27 | Fuchs Technology Ag | MELTING UNIT WITH OVEN CRADLE |
DE4434369C2 (en) * | 1994-09-15 | 1997-08-07 | Mannesmann Ag | Method and device for the metallurgical treatment of iron |
DE4445209C2 (en) * | 1994-12-17 | 1999-01-21 | Schloemann Siemag Ag | Method and device for operating a double-vessel arc furnace |
DE19621143A1 (en) * | 1996-01-31 | 1997-08-07 | Mannesmann Ag | Process for the production of stainless steels |
DE19823226A1 (en) * | 1998-05-25 | 1999-12-02 | Arcmet Technologie Gmbh Linz | Tilting arc furnace |
-
2003
- 2003-08-18 EP EP03018545A patent/EP1391523B1/en not_active Expired - Lifetime
- 2003-08-18 ES ES03018545T patent/ES2265539T3/en not_active Expired - Lifetime
- 2003-08-18 AT AT03018545T patent/ATE327348T1/en active
- 2003-08-18 DE DE50303443T patent/DE50303443D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50303443D1 (en) | 2006-06-29 |
ES2265539T3 (en) | 2007-02-16 |
ATE327348T1 (en) | 2006-06-15 |
EP1391523A1 (en) | 2004-02-25 |
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