EP1391523B1 - Deux cuves installation pour la production d'acier - Google Patents

Deux cuves installation pour la production d'acier Download PDF

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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
Application number
EP03018545A
Other languages
German (de)
English (en)
Other versions
EP1391523A1 (fr
Inventor
Dieter Kersten
Hans Ludwig Schaller
Manfred Schubert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE10332866A external-priority patent/DE10332866A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1391523A1 publication Critical patent/EP1391523A1/fr
Application granted granted Critical
Publication of EP1391523B1 publication Critical patent/EP1391523B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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)

Claims (9)

  1. Installation à double four pour la fabrication d'aciers par alternance de chargement de matières de cémentation ferreuses, de soufflage à l'oxygène et de fusion à l'arc, respectivement au moyen d'un four A et d'un four B, dont chacun est disposé sur une plateforme de gueulard basculante (3) et avec un dispositif porteur d'électrodes (16) montant et descendant, disposé entre les fours A et B et avec un dispositif de pivotement pour au moins une lance à oxygène,
    une troisième plateforme basculante (29), sur laquelle le dispositif porteur d'électrodes pivotant, montant et descendant (16) est disposé étant prévue entre les deux plateformes de gueulard basculantes (3) et la troisième plateforme basculante (29) pouvant basculer en dépendance directe des basculements de respectivement l'une des plateformes de gueulard basculantes (3) pour une carcasse du four (4), un propre entraînement basculant (30) avec un système de commande étant associé à la troisième plateforme basculante (29), avec le dispositif porteur d'électrodes pivotant, montant et descendant (16).
  2. Installation à double four selon la revendication 1, caractérisée en ce que la troisième plateforme basculante (29) avec le dispositif porteur d'électrodes pivotant, montant et descendant (16) est alternativement verrouillable avec la plateforme de gueulard (3) devant être respectivement basculée.
  3. Installation à double four selon la revendication 1,
    caractérisée en ce que le système de commande du propre entraînement basculant (30) est formé d'un système synchrone, pouvant être raccordé sur le système de commande de la plateforme de gueulard (3) devant être respectivement basculée.
  4. Installation à double four selon l'une quelconque des revendications 1 ou 3,
    caractérisée en ce que le propre entraînement basculant (30) est formé par une unité piston/cylindre (31) disposée à l'intérieur des fondations (1).
  5. Installation à double four selon l'une quelconque des revendications 1, 3 ou 4,
    caractérisée en ce que lorsque la liaison est assurée entre le système synchrone et le système de commande respectif d'une plateforme de gueulard (3) devant être basculée, une liaison avec respectivement l'autre système de commande pour respectivement l'autre plateforme de gueulard (3) est bloquée (3).
  6. Installation à double four selon l'une quelconque des revendications 1 à 5,
    caractérisée par un dispositif de pivotement du couvercle pour chaque four A et B, dans lequel est respectivement intégré le dispositif de pivotement pour la lance à oxygène (13a, 13b), le dispositif de pivotement commun (12) étant disposé sur la plateforme de gueulard basculante (3).
  7. Installation à double four selon la revendication 6,
    caractérisée en ce que le dispositif de pivotement commun (12) comporte une structure porteuse pour le couvercle du four (5) et le couvercle de lance à O2 (21) et un bras porteur (27) intégré dans ce dernier, pour la lance à oxygène (13a, b) et en ce que le dispositif porteur d'électrode (16) comporte une structure porteuse pour les électrodes (6) et pour le couvercle intérieur à électrodes (18).
  8. Installation à double four selon la revendication 7,
    caractérisée en ce que la structure porteuse de couvercle et la structure porteuse d'électrodes comportent des vérins hydrauliques (19, 22, 32), qui en fonction de l'extension géométrique du couvercle du four (5), du couvercle de lance à O2 (21) et du couvercle intérieur à électrodes (18) sont répartis sur les bras supports (14, 17) formant la structure porteuse et par l'intermédiaire desquels les couvercles respectifs peuvent être déplacés d'une position basculée en hauteur dans une position abaissée de fermeture du four et desquels les couvercles peuvent se découpler.
  9. Installation à double four selon l'une quelconque des revendications 1 à 8,
    caractérisée en ce qu'une conduite à gaz d'échappement, à travers laquelle les gaz d'échappement sont évacués hors du four, lors du processus de fusion ou du processus de soufflage est associée à chaque four (A, B) et en ce que la conduite à gaz d'échappement est formée en plusieurs éléments, un tuyau à gaz d'échappement (23) relié à la plateforme basculante (3) pouvant être relié en position pivotée par l'intermédiaire d'un tuyau à gaz d'échappement stationnaire (24) avec une chambre de postcombustion (25) et en ce qu'une tubulure à gaz d'échappement (26) qui est disposée sur le couvercle du four (5) est conçue de façon amovible par rapport au tuyau à gaz d'échappement (23) et à l'état découplé, peut être pivoté en commun avec le couvercle du four (5).
EP03018545A 2002-08-20 2003-08-18 Deux cuves installation pour la production d'acier Expired - Lifetime EP1391523B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10237974 2002-08-20
DE10237974 2002-08-20
DE10332866 2003-07-19
DE10332866A DE10332866A1 (de) 2002-08-20 2003-07-19 Doppelofenanlage für die Erzeugung von Stahlwerkstoffen

Publications (2)

Publication Number Publication Date
EP1391523A1 EP1391523A1 (fr) 2004-02-25
EP1391523B1 true EP1391523B1 (fr) 2006-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03018545A Expired - Lifetime EP1391523B1 (fr) 2002-08-20 2003-08-18 Deux cuves installation pour la production d'acier

Country Status (4)

Country Link
EP (1) EP1391523B1 (fr)
AT (1) ATE327348T1 (fr)
DE (1) DE50303443D1 (fr)
ES (1) ES2265539T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136172A1 (fr) * 2008-06-17 2009-12-23 Siemens Aktiengesellschaft Four à arc
CN109441089A (zh) * 2018-11-05 2019-03-08 中国恩菲工程技术有限公司 用于阳极炉前的翻转式操作平台

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01314888A (ja) * 1988-06-14 1989-12-20 Kawasaki Steel Corp ツインベッセル式電気炉設備
DE4138120A1 (de) * 1991-11-19 1993-05-27 Fuchs Technology Ag Einschmelzaggregat mit ofenwiege
DE4434369C2 (de) * 1994-09-15 1997-08-07 Mannesmann Ag Verfahren und Vorrichtung zum metallurgischen Behandeln von Eisen
DE4445209C2 (de) * 1994-12-17 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zum Betreiben eines Doppelgefäß-Lichtbogenofens
DE19621143A1 (de) * 1996-01-31 1997-08-07 Mannesmann Ag Verfahren zur Erzeugung nichtrostender Stähle
DE19823226A1 (de) * 1998-05-25 1999-12-02 Arcmet Technologie Gmbh Linz Kippbarer Lichtbogenofen

Also Published As

Publication number Publication date
ES2265539T3 (es) 2007-02-16
EP1391523A1 (fr) 2004-02-25
ATE327348T1 (de) 2006-06-15
DE50303443D1 (de) 2006-06-29

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