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EP0483322B1 - Installation de fusion a deux fours de fusion adjacents - Google Patents

Installation de fusion a deux fours de fusion adjacents Download PDF

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Publication number
EP0483322B1
EP0483322B1 EP91909420A EP91909420A EP0483322B1 EP 0483322 B1 EP0483322 B1 EP 0483322B1 EP 91909420 A EP91909420 A EP 91909420A EP 91909420 A EP91909420 A EP 91909420A EP 0483322 B1 EP0483322 B1 EP 0483322B1
Authority
EP
European Patent Office
Prior art keywords
furnace
vessel
shaft
melting
plant according
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.)
Revoked
Application number
EP91909420A
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German (de)
English (en)
Other versions
EP0483322A1 (fr
Inventor
Joachim Ehle
Gerhard Fuchs
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Fuchs Technology AG
Original Assignee
Fuchs Technology AG
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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
    • 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
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • 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
    • 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
    • F27B3/18—Arrangements of devices for charging
    • F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
    • F27B3/186—Charging in a vertical chamber adjacent to the melting chamber

Definitions

  • the invention relates to a melting unit according to the preamble of patent claim 1 and a method for operating such a melting unit according to the preamble of patent claim 18.
  • a melting unit of this type has become known, for example, from DE-A1-32 32 139. It contains two melting furnaces arranged side by side, to which melting energy is alternately fed by means of a heating device in the form of arc electrodes. While the melting process is taking place in one melting furnace, the other melting furnace is tapped, recharged and the exhaust gases from the furnace in the melting mode are passed through the other furnace to preheat this batch. In this way, a more even use of the power supply and increased productivity is achieved. Furthermore, the heat content of the furnace exhaust gases produced during the melting and refining process is used to preheat the feed material of the other melting furnace, and the passage of the exhaust gases through the feed material also reduces the amount of dust and thus the load on the downstream dedusting device.
  • the furnace gases are drawn off through the cover and introduced into the adjacent furnace vessel in the lower jacket area.
  • the furnace exhaust gases cannot be used to preheat feed material in the initial phase of the melting process, since in this phase the other melting furnace is tapped, serviced and recharged.
  • a melting unit with an arc furnace which contains a furnace vessel with a shaft-shaped charge preheater arranged laterally thereon, the interior of which is connected to the interior of the arc furnace in a region adjoining its base by a connecting zone. and which has in its upper area a closable loading device for the charge and a gas outlet.
  • a melting unit of this type allows good use of the thermal energy of the furnace exhaust gas as long as the shaft-shaped charge preheater is at least partially filled.
  • the object of the invention is to enable a melting unit of the type mentioned in the preamble of claim 1, a preheating of metal feedstock with the furnace gases of the furnace in the melting mode and a rough dedusting of these furnace gases by feedstock during the initial phase of the melting process in order to to make better use of the heat content of the furnace exhaust gases and to reduce the total amount of dust. This should be possible without having to expose the opening for introducing the furnace gases of the other melting furnace to the effect of melt spraying. Furthermore, a method for operating such a melting unit is to be specified.
  • the melting unit according to the invention is characterized by the features of claim 1. Advantageous configurations of this unit can be found in claims 2 to 17.
  • the method according to the invention is characterized by the features of claim 18. Advantageous refinements of the method can be found in the remaining claims.
  • the melting unit As a result of a shaft which replaces an outer segment of the vessel lid on one side, it can be ensured during the entire switching-on time of the heating device that feed material is preheated during the melting and refining process and that the gases are filtered in the process it by the feed material in the shaft of the furnace in which the melting process is initiated, be it by the feed material in the shaft of the other furnace if the feed column of the shaft has dropped so far in the first furnace that it can no longer take on this task.
  • the gas flow can be controlled accordingly by lockable gas lines.
  • the gas inlet is preferably arranged in the upper jacket region of the vessel, in the vessel lid or in the lower region of the wall of the shaft of the melting furnace. As a result, the gas is supplied at a point that is not exposed to the area affected by melt or slag splashes.
  • the melting unit shown in the figures contains two melting furnaces 1/1 and 1/2 and a heating device 2, by means of which heating energy can optionally be supplied to one of the melting furnaces in order to heat the feed material, such as steel scrap, of the relevant melting furnace, to melt it and to the tapping temperature bring to.
  • Each melting furnace contains a furnace vessel 3/1 or 3/2, which can be closed by a vessel lid 4/1 or 4/2.
  • the heating device 2 is designed as an arc device and contains three arc electrodes 5, which are each carried by a support arm 6. These can be raised and lowered by means of an electrode lifting and swiveling device 7 and, as shown in FIG. 1 by a double arrow 8, can be swiveled laterally. They can be inserted into the first oven vessel 3/1 or into the second oven vessel 3/2 through the electrode passage openings 9/1 or 9/2 provided in the vessel lids 4/1 or 4/2.
  • the position of the electrode lifting and swiveling device 7 is determined in the plan view by the tip of an isosceles triangle, the base of which is the center between each connects three electrode passage openings 9/1 and 9/2.
  • Each melting furnace 1/1 or 1/2 has an outer segment of the vessel lid on one side, in the present case on the side facing away from the neighboring vessel, through a shaft fastened in a holding structure 11/1 or 11/2 12/1 or 12/2 replaced, which has a closable loading opening 13/1 or 13/2 for the feed material and a gas outlet 14/1 or 14/2 in its upper region.
  • Each of the shafts 12/1 or 12/2 is almost rectangular in plan view, with an interior 15/1 or 15/2 that widens downwards. This can be closed by means of a manhole cover 16/1 or 16/2, which has the cross section shown in FIG.
  • 3 in the form of an inverted U, and is horizontally displaceable on rails 17/1 or 17/2. 3 shows the shaft 12/1 in the closed state and the shaft 12/2 in the open state, in which feed material can be charged into the shaft by means of a charge container 18.
  • the furnace vessels 3/1 and 3/2 are each formed in the plan view as an oval delimited on one side by a straight line (see the left furnace vessel in FIG. 1), the lower opening of the shaft in the through the straight wall section and adjacent sections of the oval specific vascular area opens. Furthermore, in the exemplary embodiment, the vessel lid 4/1 or 4/2 is detachably attached to the holding structure 11/1 or 11/2 of the associated shaft 12/1 or 12/2.
  • the furnace vessels are fastened in frames 18/1 and 18/2, which in turn are mounted on lifting devices 19/1 and 19/2.
  • Each of the lifting devices contains four lifting cylinders which act on the corners of the rectangular frame in plan view, the lifting cylinders in each case being rotatably connected to the frames 18/1 and 18/2 on one side via hinge joints 20/1 and 20/2.
  • This enables both a lowering movement of the furnace vessels 3/1 or 3/2 and a tilting movement for parting off the vessels through a tap hole (not shown) present in the base.
  • the tilting process runs perpendicular to the paper plane.
  • pans 21/1 and 21/2 are shown in FIG. 2 for receiving the liquid metal from the furnace vessels.
  • the electrode passage openings of the melting furnaces can be closed by a cover plate 30 (see FIG. 3).
  • a gas line system is provided, which is described below.
  • Each of the gas outlets 14/1 or 14/2 can be shut off by gas lines either via a filter device with an exhaust gas chimney or with a gas inlet 22/2 or 22/1 in the cover 4/2 or 4/1 of the adjacent melting furnace 1 / 2 or 1/1 connectable.
  • the gas line system of the exemplary embodiment is explained in more detail with reference to FIGS. 1 and 2.
  • the shut-off devices can be designed, for example, as swivel flaps or slides which can be actuated by actuators.
  • the two outer gas line sections are connected via branches to the gas outlets 14/1 and 14/2 of the shafts 12/1 and 12/2, the middle section via branches and elbows 27/1 and 27/2 to the gas inlet 22 / 1 or 22/2 in the vessel lid of the first or second melting furnace. In the latter branches there are further shut-off devices 28/1 and 28/2.
  • the holding structure 11/1 or 11/2 of each shaft can be moved parallel to the connecting line between the center lines of the shafts on rails 29/1 and 29/2.
  • the vessel lid 4/2 is shown in the position moved to the side, in which the furnace vessel for charging the contents of a charge container is released directly into the furnace vessel.
  • the furnace vessel in question must be slightly lowered using the lifting devices 19/1 or 19/2.
  • the elbow 27/2 is firmly connected to the gas inlet 22/2 and is moved together with the holding structure 11/2.
  • the manifolds must therefore be releasably connected to the associated branches of the gas line 23.
  • the electrodes 5 are raised and swiveled away to the side.
  • the furnace vessel is lowered somewhat by means of the lifting device 19/1.
  • the support structure 11/1 is moved to the side on the rails 29/1, i. H. moved from the position shown in Figures 1 and 2 to the right so that the opening of the vessel 3/1 is free for the charging process.
  • the lid with the shaft is moved back into the operating position by means of its holding device and the furnace vessel is raised by means of the lifting device 19/1 until the rim of the vessel closes tightly with the lid.
  • shut-off devices of the gas line 23 are controlled so that the gas outlet 14/1 of the shaft 12/1 is connected to the connecting line 24/1, ie the shut-off devices 26/1 and 28/1 must be closed and the shut-off device 25/1 must be open .
  • the electrodes 5 are brought into the operating position for the melting furnace 1/1 by the electrode lifting and swiveling device 7 and the arcs are ignited have been initiated, the melting process in this furnace.
  • Burners can also be provided as a heating device instead of or in addition to the arc electrodes (not shown).
  • the second furnace vessel 3/2 can be used in the same way as the first one Oven vessel to be charged. After charging this vessel can z. B. burners and with closed shut-off devices 28/2 and 26/2 and open shut-off device 25/2 can already be started with the heating of this batch.
  • the exhaust gases in the first melting furnace 1/1 are sufficiently cooled by the feed in the shaft 12/1. These exhaust gases are fed directly to the filter house, ie the dedusting device, via a fan.
  • the filter house ie the dedusting device
  • the exhaust gas is circulated 1/2 into the vessel of the second melting furnace and through the shaft 12/2 passed through this furnace.
  • the shut-off devices 25/1, 28/1 and 26/2 must be closed and the shut-off devices 26/1, 28/2 and 25/2 must be open.
  • the gas is introduced from the upper end of the shaft of the first melting furnace 1/1 into the second neighboring melting furnace 1/2 through its cover and from there through the shaft 12/2 of this melting furnace and from the upper gas outlet 14 / 2 is pulled into the filter house.
  • the dust particles that are in the gas are deposited in the feed material of the shaft 12/2 of the second melting furnace.
  • the electrodes 5 are raised and swiveled immediately to the second melting furnace 1/2, in order to start the melting process there immediately after the shut-off elements analogous to that for the above Melting furnace 1/2 process have been reversed.
  • the shut-off devices 26/2 and 28/2 must be closed and the shut-off device 25/2 must be open.
  • the first melting furnace 1/1 can now be tapped by actuating the lifting device 19/1 on one side. The tap hole is then checked and filled, and immediately afterwards all of the feed for the next melt is filled into the furnace vessel or into the shaft.
  • Preheating this batch can also be started here with the second heating device, closed shut-off devices 28/1 and 26/1 and open shut-off device 25/1.
  • the shut-off devices 25/2, 28/2 and 26/1 must be closed and the shut-off devices 26/2, 28/1 and 25/1 must be open.
  • a very good exhaust gas utilization and filtering of the exhaust gas is given by the fact that the furnace gases are first passed through the shaft of the own melting furnace, while the other melting furnace is tapped and charged, and that when the exhaust gas temperature of the first shaft has risen sufficiently or the scrap column here due to the melting process, it sank almost to the level of the vessel lid the furnace gases are led into the other vessel and there through the filled scrap chute.
  • the diversion can be done in a simple manner by controlling the shut-off devices.
  • the electrodes are swiveled to the other melting furnace immediately after the feed material has been melted in one melting furnace and brought to the tapping temperature and the melting process is started here, it is possible, for example, if the heating device is switched on for 32 minutes per melting furnace plus 2 minutes for the Sampling and 1 minute for swiveling the electrodes achieve a tap-to-tap time of about 35 minutes with the described melting unit.
  • the tapping of the furnace vessel, the subsequent filling of the tap hole and the charging processes take a total of about 15 minutes, so that a further 20 minutes remain for preheating the feed material in the other melting furnace. This period of time is sufficient for a good use of the exhaust gas. Of particular importance here is the reduction in the total amount of dust generated by filtering the furnace gases as they pass through the feedstock. The dust is deposited in the feed material and largely melted down and removed with the slag.
  • the gas lines which each lead from the gas outlet of the shaft of one melting furnace to the gas inlet in the cover of the other melting furnace have branches to the dedusting device.
  • a second gas outlet can also be provided in the upper region of each shaft, which is connected to the dedusting device by a gas line which can be shut off. It is also not necessary that the gas inlet is provided in the lid. It can also be arranged in the lower area of the shaft or in the upper jacket area of the furnace vessel of the melting furnace 1/1 or 1/2.
  • the separation from the upper vessel edge required for a transverse displacement of the vessel lid is brought about by lowering by means of the lifting device of the furnace vessel, which at the same time enables the vessel to tilt for tapping.
  • the required separation from the edge of the vessel can also be brought about by lifting the holding structure in which the vessel lid is detachably fastened.
  • a charge column is formed by charging the second and third scrap basket into the upper shaft opening, which column is supported on the bottom of the vessel and fills the shaft.
  • material is melted from the lower area of the feed column so that its height is continuously reduced.
  • a movable locking member in the lower area of the shaft that replaces part of the vessel lid, which can be moved from a closed position in which it forms a support for feed material into a release position for charging feed material into the furnace vessel. This makes it possible, at the beginning of the melting process, to hold back the feed column in the shaft of the furnace in question without reducing its height until it is released into the furnace vessel by the movable locking member, and thus to increase the possible variations in the process sequence.
  • arc electrodes fed from an energy source suitable as a heating device but also Burners, an inductive heating device etc. If, as in the case described, arc electrodes are used, which are introduced through electrode feedthroughs in the lid, then the furnace gases which are produced during the melting operation of the other melting furnace and which close the electrode passage openings must be passed through in the vessel it through individual lids for each electrode bushing, be it through a common lid for all electrode bushings.

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Claims (21)

  1. Installation de fusion comportant un dispositif de chauffage (2) pour l'envoi d'une énergie de fusion et deux fours de fusion (1/1; 1/2) disposés côte-à-côte et constitués chacun par une enceinte (3/1; 3/2) pouvant être fermée par un couvercle (4/1; 4/2), et dans laquelle chaque four de fusion comporte deux ouvertures de passage de gaz (22/1; 22/2 ou 14/1; 14/2), ainsi que des canalisations de gaz (23; 24/1; 24/2) pouvant être fermées et qui relient respectivement une ouverture de passage de gaz (22/1 ou 22/2) d'un four de fusion (1/1 ou 1/2) à une ouverture de passage de gaz (14/2 ou 14/2) de l'autre four de fusion (1/2 ou 1/1), de sorte que pour le préchauffage du matériau métallique chargé, les gaz, qui apparaissent lors de l'opération de fusion, d'un four de fusion (1/1 ou 1/2) peuvent être introduits dans l'autre four de fusion respectif (1/2 ou 1/1), caractérisée par le fait que d'un coté, dans chaque four de fusion, un segment extérieur du couvercle (4/1; 4/2) de l'enceinte est remplacé par un puits (12/1; 12/2) fixé dans une structure de retenue (11/1; 11/2) et qui possède, dans sa partie supérieure, une ouverture de chargement pouvant être fermée (13/1; 13/2) pour le matériau chargé et une ouverture de passage de gaz (14/1; 14/2) du four de fusion considéré.
  2. Installation de fusion suivant la revendication 1, caractérisée par le fait que l'une des ouvertures de passage de gaz (22/1; 22/2) est disposée dans la partie enveloppe supérieure de l'enceinte (3/1; 3/2) du four, dans le couvercle (4/1; 4/2) de l'enceinte ou dans la partie inférieure de la paroi du puits (12/1; 12/2) du four de fusion considéré (1/1; 1/2).
  3. Installation de fusion suivant la revendication 1 ou 2, caractérisée par le fait qu'au moins l'une des canalisations de gaz possède une dérivation, qui est raccordée à un dispositif de dépoussiérage par l'intermédiaire d'une autre canalisation de gaz pouvant être fermée (24/1; 24/2).
  4. Installation de fusion suivant la revendication 1 ou 2, caractérisée par le fait que dans la partie supérieure du puits (12/1; 12/2) d'au moins l'un des deux fours de fusion (1/1; 1/2) est prévue une autre ouverture de passage de gaz, qui est reliée à un dispositif de dépoussiérage par l'intermédiaire d'une autre canalisation de gaz pouvant être fermée.
  5. Installation de fusion suivant l'une des revendications 1 à 4, caractérisée par le fait que le puits (12/1; 12/2) est disposé respectivement sur le côté d'un four de fusion (1/2; 1/1), tourné à l'opposé de l'enceinte voisine (3/2; 3/1).
  6. Installation de fusion suivant l'une des revendications 1 à 5, caractérisée par le fait que le puits (12/1; 12/2) est réalisé avec une forme approximativement rectangulaire en vue en plan.
  7. Installation de fusion suivant l'une des revendications 1 à 6, caractérisée par le fait que la section transversale de l'espace intérieur (15/1; 15/2) du puits (12/1; 12/2) s'élargit vers le bas.
  8. Installation de fusion suivant l'une des revendications 1 à 7, caractérisée par le fait que les enceintes (3/1; 3/2) des fours sont réalisées, selon une vue en plan, respectivement sous la forme d'un ovale limité d'un côté par une droite, et l'ouverture inférieure du puits (12/1; 12/2) débouche dans la zone de l'enceinte, qui est délimitée par la section de paroi rectiligne et par les sections contiguës de l'ovale.
  9. Installation de fusion suivant la revendication 8, caractérisée par le fait que la droite limite l'ovale entre les 3/4 et les 9/10 de sa longueur.
  10. Installation de fusion suivant l'une des revendications 1 à 9, caractérisée par le fait que le couvercle (4/1; 4/2) de l'enceinte est fixé de façon amovible à la structure de retenue (11/1; 11/2).
  11. Installation de fusion suivant l'une des revendications 1 à 10, caractérisée en ce que la structure de retenue (11/1; 11/2) peut être soulevée par un dispositif de levage par rapport à l'enceinte (3/1; 3/2) du four.
  12. Installation de fusion suivant l'une des revendications 1 à 11, caractérisée par le fait que l'enceinte (3/1; 3/2) du four peut être abaissée par rapport à la structure de retenue (11/1; 11/2).
  13. Installation de fusion suivant l'une des revendications 1 à 12, caractérisée par le fait que la structure de maintien (11/1; 11/2) et l'enceinte (3/1; 3/2) du four sont déplaçables horizontalement l'une par rapport à l'autre.
  14. Installation de fusion suivant la revendication 13, caractérisée en ce que la structure de retenue (11/1; 11/2) est déplaçable parallèlement à la droite reliant les axes centraux des puits (12/1; 12/2).
  15. Installation de fusion suivant la revendication 13, caractérisée par le fait que les enceintes (3/1; 3/2) des fours sont déplaçables perpendiculairement à la droite reliant les axes centraux des puits (12/1; 12/2).
  16. Installation de fusion suivant l'une des revendications 1 à 15, caractérisée par le fait qu'au moins un organe mobile de blocage est disposé dans la partie inférieure du puits (12/1; 12/2) de telle sorte qu'il est déplaçable depuis une position fermée, dans laquelle il forme un support pour le matériau chargé, dans une position ouverte ou de libération pour le chargement du matériau à charger de l'enceinte du four et dans laquelle il libère le passage du matériau chargé à travers le puits.
  17. Installation de fusion suivant l'une des revendications 1 à 16, caractérisée par le fait que les couvercles (4/1; 4/2) des enceintes des deux fours de fusion (1/1; 1/2) possèdent au moins chacun une ouverture de passage d'électrodes (9/1; 9/2) pouvant être fermée et qu'à côté des enceintes des fours (1/1; 1/2) est disposé un dispositif (7) de soulèvement et d'abaissement d'électrodes, grâce auquel une ou plusieurs électrodes à arc électrique (5) peuvent être introduites au choix dans l'un des fours de fusion (1/1; 112).
  18. Procédé pour le préchauffage et la fusion d'un matériau métallique chargé, à l'aide d'un dispositif de chauffage dans une installation de fusion suivant l'une des revendications 1 à 17, caractérisé par les étapes suivantes:
    a) chargement du matériau à charger dans la première enceinte et dans le premier puits associé à cette enceinte, jusqu'à ce que ce dernier soit au moins partiellement chargé,
    b) chauffage du matériau chargé dans la première enceinte, par le dispositif de chauffage et évacuation des gaz du four à partir du premier puits dans une cheminée;
    c) répétition de l'étape 1 pour le second puits de fusion;
    d) transfert des gaz, évacués du premier puits, de la première enceinte dans la seconde enceinte et, par l'intermédiaire du second puits, en direction de la cheminée;
    e) après la fusion du matériau chargé et le traitement métallurgique de la masse fondue dans le premier récipient, chauffage du matériau chargé dans le second récipient au moyen du dispositif de chauffage et arrêt et maintenance de la première enceinte;
    f) répétition des étapes a) à e).
  19. Procédé suivant la revendication 18, caractérisé par le fait que lors du chargement du matériau devant être chargé, on introduit une partie de ce matériau directement dans l'enceinte, alors que le couvercle est retiré, et on introduit le reste dans le puits associé à l'enceinte.
  20. Procédé suivant la revendication 18 ou 19, caractérisé par le fait que le chauffage du matériau chargé est réalisé par au moins un arc électrique et/ou par au moins un brûleur.
  21. Procédé suivant l'une des revendications 18 à 20, en liaison avec une installation de fusion suivant la revendication 16, caractérisé par le fait que le matériau chargé situé dans le puits du four de fusion, dans lequel se déroule précisément le processus de fusion, est retenu suffisamment longtemps pour que les gaz de ce four de fusion soient transférés dans l'autre four de fusion.
EP91909420A 1990-05-17 1991-05-16 Installation de fusion a deux fours de fusion adjacents Revoked EP0483322B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4015916A DE4015916A1 (de) 1990-05-17 1990-05-17 Einschmelzaggregat mit zwei nebeneinander angeordneten schmelzoefen
DE4015916 1990-05-17
PCT/EP1991/000916 WO1991018120A1 (fr) 1990-05-17 1991-05-16 Installation de fusion a deux fours de fusion adjacents

Publications (2)

Publication Number Publication Date
EP0483322A1 EP0483322A1 (fr) 1992-05-06
EP0483322B1 true EP0483322B1 (fr) 1994-08-10

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EP91909420A Revoked EP0483322B1 (fr) 1990-05-17 1991-05-16 Installation de fusion a deux fours de fusion adjacents

Country Status (20)

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US (1) US5264020A (fr)
EP (1) EP0483322B1 (fr)
JP (1) JPH0820180B2 (fr)
KR (1) KR920703850A (fr)
CN (1) CN1041557C (fr)
AT (1) ATE109837T1 (fr)
AU (1) AU634889B2 (fr)
BR (1) BR9105760A (fr)
CA (1) CA2063562C (fr)
DE (2) DE4015916A1 (fr)
DK (1) DK0483322T3 (fr)
ES (1) ES2072612T3 (fr)
FI (1) FI95814C (fr)
HU (1) HU209854B (fr)
MX (1) MX173918B (fr)
PT (1) PT97697B (fr)
RU (1) RU2044977C1 (fr)
TR (1) TR25664A (fr)
WO (1) WO1991018120A1 (fr)
ZA (1) ZA913708B (fr)

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DE19545831A1 (de) * 1995-12-08 1997-06-12 Gutehoffnungshuette Man Doppelgefäß-Lichtbogenofen
US5802098A (en) * 1995-03-15 1998-09-01 Man Gutehoffnungshutte Aktiengesellschaft Melting vessel with fastening, mounting and tilting devices

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DE4209765C2 (de) * 1992-03-23 1994-11-03 Mannesmann Ag Verfahren und Vorrichtung zur Behandlung der Abgase eines Lichtbogenofens
DE4302285C3 (de) * 1993-01-25 1998-07-09 Mannesmann Ag Verfahren und Einrichtung zum Betreiben einer Zweiofenanlage
FR2705363B1 (fr) * 1993-05-13 1995-08-11 Clecim Sa Procédé de fusion de ferraille dans un four électrique et installation pour la mise en Óoeuvre du procédé.
FR2705364B1 (fr) * 1993-05-13 1995-08-11 Clecim Sa Procédé de préchauffage et de fusion de ferraille dans un four électrique et installation de production de métal liquide mettant en Óoeuvre le procédé.
DE4406260A1 (de) * 1994-02-25 1995-08-31 Fuchs Technology Ag Verfahren zum Betrieb eines Einschmelzaggregates mit zwei nebeneinander angeordneten Öfen und Einschmelzaggregat
US5479434A (en) * 1994-03-11 1995-12-26 Mannesmann Aktiengesellschaft Double-hearth arc furnace for preheating scrap material and method of operating the same
TR27747A (tr) * 1994-06-03 1995-07-10 Clecim Sa Bir elektrik firini icinde hurda demir eritme yöntemi ve yöntemi isletmek icin tertibat.
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
US5516997A (en) * 1994-12-08 1996-05-14 Hunter; Robert E. Battery powered dent pulling device
DE4445209C2 (de) * 1994-12-17 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zum Betreiben eines Doppelgefäß-Lichtbogenofens
JP3419950B2 (ja) * 1995-04-14 2003-06-23 新日本製鐵株式会社 アーク炉の予熱装置
DE19621143A1 (de) * 1996-01-31 1997-08-07 Mannesmann Ag Verfahren zur Erzeugung nichtrostender Stähle
DE19634348A1 (de) * 1996-08-23 1998-02-26 Arcmet Tech Gmbh Einschmelzaggregat mit einem Lichtbogenofen
US6024912A (en) * 1997-11-27 2000-02-15 Empco (Canada) Ltd. Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases
DE19807616A1 (de) * 1998-02-13 1999-08-26 Mannesmann Ag Beschickungseinrichtung für Niederschachtöfen
CN101349509B (zh) * 2007-07-17 2010-09-08 新疆八一钢铁集团有限责任公司 利用煤气加热炉热废气预热烧结混合料方法
DE102010040879A1 (de) * 2010-09-16 2012-03-22 Siemens Aktiengesellschaft Schmelzmetallurgische Anlage
DE102010041209A1 (de) * 2010-09-22 2012-03-22 Siemens Aktiengesellschaft Vorwärmvorrichtung für Stahlschrott und damit ausgestattetes metallurgisches Schmelzgefäß
RU2557039C2 (ru) * 2010-12-10 2015-07-20 ДАНИЕЛИ энд К. ОФФИЧИНЕ МЕККАНИКЕ СПА Устройство и способ предварительного нагрева садки металла для плавильной установки
CN103063035A (zh) * 2012-12-25 2013-04-24 苏占忠 一种碳化硅冶炼炉装炉机
JP6451224B2 (ja) * 2014-11-05 2019-01-16 大同特殊鋼株式会社 電気炉の操業方法
US10215494B2 (en) 2014-11-05 2019-02-26 Daido Steel Co., Ltd. Method of operating electric arc furnace
US9903653B2 (en) 2014-11-05 2018-02-27 Daido Steel Co., Ltd. Melting furnace
US10234206B2 (en) 2014-11-05 2019-03-19 Daido Steel Co., Ltd. Electric arc furnace
RU2612472C2 (ru) * 2015-03-06 2017-03-09 Юрий Николаевич Тулуевский Способ нагрева металлического лома в шахтном подогревателе дуговой сталеплавильной печи и горелочное устройство для его реализации
US11441844B2 (en) 2019-08-20 2022-09-13 Omachron Intellectual Property Inc. Method of recycling heat
CN110551896B (zh) * 2019-09-14 2024-07-09 梅州伟友耐磨材料有限公司 具有除尘功能的中频炉熔炼生产线
RU2734885C1 (ru) * 2020-01-09 2020-10-23 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тверской государственный технический университет" Шахтно-конвейерная дуговая сталеплавильная печь

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DE3421485A1 (de) * 1984-06-08 1985-12-12 Fuchs Systemtechnik GmbH, 7601 Willstätt Lichtbogenofen mit einem auf einer seite des ofengefaesses vorgesehenen aufnahmeraum fuer chargiergut
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Publication number Priority date Publication date Assignee Title
US5802098A (en) * 1995-03-15 1998-09-01 Man Gutehoffnungshutte Aktiengesellschaft Melting vessel with fastening, mounting and tilting devices
DE19545831A1 (de) * 1995-12-08 1997-06-12 Gutehoffnungshuette Man Doppelgefäß-Lichtbogenofen
DE19545831C2 (de) * 1995-12-08 2000-09-07 Sms Demag Ag Verfahren zum Betreiben einer Doppelgefäß-Lichtbogenofen-Anlage sowie Doppelgefäß-Lichtbogenofen

Also Published As

Publication number Publication date
KR920703850A (ko) 1992-12-18
US5264020A (en) 1993-11-23
EP0483322A1 (fr) 1992-05-06
DK0483322T3 (da) 1994-09-26
WO1991018120A1 (fr) 1991-11-28
CN1041557C (zh) 1999-01-06
FI95814C (fi) 1996-03-25
ZA913708B (en) 1992-02-26
MX173918B (es) 1994-04-08
CA2063562C (fr) 1997-03-11
TR25664A (tr) 1993-07-01
ATE109837T1 (de) 1994-08-15
ES2072612T3 (es) 1995-07-16
DE59102492D1 (de) 1994-09-15
PT97697B (pt) 1998-12-31
RU2044977C1 (ru) 1995-09-27
PT97697A (pt) 1993-06-30
AU634889B2 (en) 1993-03-04
JPH0820180B2 (ja) 1996-03-04
HUT61812A (en) 1993-03-01
BR9105760A (pt) 1992-09-08
CN1056567A (zh) 1991-11-27
FI920173A0 (fi) 1992-01-15
HU209854B (en) 1994-11-28
DE4015916A1 (de) 1991-11-21
JPH05500263A (ja) 1993-01-21
CA2063562A1 (fr) 1991-11-18
AU7863991A (en) 1991-12-10
HU9200145D0 (en) 1992-04-28
FI95814B (fi) 1995-12-15

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