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EP0170809B1 - Four à arc muni d'un espace de chargement sur le côté - Google Patents

Four à arc muni d'un espace de chargement sur le côté Download PDF

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Publication number
EP0170809B1
EP0170809B1 EP85106662A EP85106662A EP0170809B1 EP 0170809 B1 EP0170809 B1 EP 0170809B1 EP 85106662 A EP85106662 A EP 85106662A EP 85106662 A EP85106662 A EP 85106662A EP 0170809 B1 EP0170809 B1 EP 0170809B1
Authority
EP
European Patent Office
Prior art keywords
furnace
charging material
electrode
arc
space
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
Application number
EP85106662A
Other languages
German (de)
English (en)
Other versions
EP0170809A2 (fr
EP0170809A3 (en
Inventor
Gerhard Fuchs
Joachim Ehle
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.)
Primetals Technologies Germany GmbH
Original Assignee
Fuchs Systemtechnik GmbH
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
Application filed by Fuchs Systemtechnik GmbH filed Critical Fuchs Systemtechnik GmbH
Priority to AT85106662T priority Critical patent/ATE37947T1/de
Priority to EP88105416A priority patent/EP0291680B2/fr
Publication of EP0170809A2 publication Critical patent/EP0170809A2/fr
Publication of EP0170809A3 publication Critical patent/EP0170809A3/de
Application granted granted Critical
Publication of EP0170809B1 publication Critical patent/EP0170809B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • 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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids or removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes

Definitions

  • the invention relates to an electric arc furnace with at least one receiving space for charging goods, which is provided on one side of the furnace vessel, according to the preamble of claim 1.
  • the arc furnace of this type which has become known from EP-A1-56 773, the arc furnace has a lateral bulge, the sole of which is higher than the sole of the hearth.
  • the input material is charged in this bulged part and stored as a pile on the raised sole.
  • the hot furnace gases are passed through the upper part of this pile, and the pile is also exposed to the radiant heat of the arc furnace and is thereby heated.
  • the preheated feed is fed in batches from the lowest section of the pile into the oven hearth.
  • the sole of the side bulge of the furnace is sloping towards the stove.
  • the preheated bottom section of the charge column can be conveyed through the connection zone into the oven hearth, i.e. the insert can be fed to the melting vessel in batches.
  • a charging device attached to the top of the charge material preheater allows the charge material to be fed continuously into the preheater and a gas outlet located in the vicinity thereof allows the furnace gases cooled in the heat exchange with the charge material within the charge material column to be drawn off.
  • the object of the invention is to increase the possible heat transfer into the charge material in an arc furnace according to the preamble of claim 1 and thus to shorten the heating time of the charge material. It should make better use of the radiant heat and the resulting hot furnace gases when heating the charging material and thereby improve the thermal efficiency.
  • the heat load on the furnace walls should be reduced.
  • a continuous flow of material from the receiving space for the goods to be charged into the oven hearth and thus more uniform operating conditions are to be made possible. Temperature fluctuations and fluctuations in the chemical composition of the weld pool should be reduced.
  • the electrodes can be brought into the immediate vicinity of the receiving space for the cargo to be provided on one side of the furnace vessel, so that the radiant heat generated by the arcs is intensified
  • Charge material can act and at the same time the radiation exposure of the free wall areas of the arc furnace is reduced.
  • the hot gases that are generated in the area of the arcs, particularly when coal and other feedstocks are added, are introduced directly into the charge material, so that their sensible heat can be optimally utilized.
  • burners and / or nozzles are additionally provided on the lower area of the receiving space for the goods to be charged, this area can be additionally heated or oxygen, coal or other additives can be introduced for temperature control and control of the composition of the melt pool.
  • the bottom of the receiving space for the charge is arranged so deep that when a liquid sump is formed in the furnace, it extends into the receiving space and enables a direct material and conductive heat exchange in the lowest zone of the accumulated charge. In this way, an additional heat flow is made possible for the lowermost zone of the charge column standing in the liquid sump. In this zone there is an intensive exchange of material and heat, which is caused by the bath movement that always occurs in the stove. In this way, the melt overheated in the area of the arcs emits heat in this zone, as a result of which the material which has already been preheated is melted in this zone.
  • the liquefied material flows continuously from the receiving space for the charge material into the liquid melt pool of the furnace, so that the operating conditions can be kept largely constant here.
  • the zone of the festival Liquid transition also takes place chemical-metallurgical reactions, such as slag formation, carburization, etc., which can be promoted by the targeted addition of oxygen, coal or aggregates.
  • chemical-metallurgical reactions such as slag formation, carburization, etc., which can be promoted by the targeted addition of oxygen, coal or aggregates.
  • the thermal conditions in the furnace be kept constant and set to an optimal working point, but also larger fluctuations in the composition of the melt can be prevented or the composition of the melt can be controlled.
  • a change in position of either the arc electrodes or the furnace vessel together with the receiving space brings the electrodes back to the center of the furnace and in this position the bath to heated to the required tapping temperature.
  • the movability of the electrodes or the arc furnace makes it possible to change the position of the heat source within the furnace in the course of the melting process so that both the melting process and metallurgical processes can run optimally within the furnace.
  • the furnace assembly shown in FIGS. 1 and 2 in a vertical section and in a plan view contains an electric arc furnace 1 consisting of a furnace vessel 2 and a removable cover 3, through which 3 electrodes 4 / 1.4 / 2 and 4/3 are passed.
  • the furnace vessel 2 is formed by a stove 5 made of a refractory lining and preferably by liquid-cooled wall elements 6.
  • a shaft-shaped charge preheater 7 with a receiving space (interior) 8 for charge goods is arranged, which in a region adjacent to its base 9 is connected by a connecting zone 10 the interior 11 of the furnace vessel 2 is connected.
  • the Chargiergutvor lockerr 7 has a gas-tight feed device 12, z. B. a double bell closure of known type, and a gas outlet 13 to which a suction device, not shown, is connected.
  • the charge preheater 7 extends approximately over a quarter of the circumference of the furnace vessel 2, the shaft wall 14 of the charge preheater facing the furnace vessel being adapted to the outer contour of the furnace vessel. From Fig. 1 it can be seen that the cross section of the interior 8 of the charge preheater 7 extends downward. This is intended to enable unhindered sinking of the cargo in the cargo preheater. Burners 15 or nozzles for blowing in gases, such as oxygen, or solids, such as coal or aggregates, open into the connecting zone 10.
  • gases such as oxygen, or solids, such as coal or aggregates
  • the feed material 16 charged in the charge material preheater 7 can consist of metal scrap, in particular steel scrap and other iron carriers, such as lumpy pig iron, sponge iron and aggregates. It forms in the charge material preheater 7 a gas-permeable pouring column referred to as the charge goods column 17.
  • the molten metal (sump) formed in the arc furnace 1 is designated 18, the melt level 19.
  • An eccentric bottom cut 21 is provided in the bottom of the oven hearth 5, which is shown in broken lines in FIG. 2.
  • the furnace vessel 2 is designed to be tiltable.
  • the tilt level, i.e. the plane in which the tilting movement takes place is designated by 22.
  • the charge preheater 7 is arranged in a direction transverse to the tilting plane of the furnace vessel.
  • Each of the electrodes 4/1 to 4/3 contains a liquid-cooled metallic upper part 23 and a lower part 24 which forms the electrode tip and is made of an edible material, such as graphite, which is detachably attached to the upper part 23.
  • Each electrode 4/1, 4/2 or 4/3 is clamped with its upper part 23 into an electrode support arm 25/1, 25/2 or 25/3, which is supported by an electrode lifting mechanism 26/1, 26/2 or 26/3 can be raised and lowered.
  • the electrode hoists 26/1 to 26/3 are located on the receiving space for the cargo, i.e. the shaft-shaped charge material preheater 7 opposite side next to the furnace vessel 2.
  • each of the electrode support arms 25/1 to 25/3 is one Horizontal guide 27/1, 27/2 or 27/3 connected to the associated hoist 26/1, 26/2 or 26/3 and by a two-way drive, which is not shown in the drawing, along the guide movable back and forth.
  • the guides 27/1 and 27/3 of the two outer electrode support arms 25/1 and 25/3 are each curved outwards, so that when the electrode support arms 25/1 and 25/3 move back and forth, they move by a limited angle in the direction horizontal plane are pivotable.
  • the trajectories of the central axes of the electrodes 4/1 to 4/3 during the forward and backward movement of the electrode support arms along the guides 27/1 to 27/3 are shown in dash-dot lines in FIG.
  • the movement paths 28/1 and 28/3 are also curved outwards.
  • the ends of the trajectories are marked by cross lines, which thus illustrate the extreme positions of the central axes of the electrodes. In the left extreme position shown in FIG. 2, the electrodes 4 / 1.4 / 2 and 4/3 each have approximately the same distance from the receiving space 8.
  • the horizontal guides 27/1 to 27/3 for the electrode support arms 25/1 to 25/3 can be designed according to FIG. 3.
  • This FIG. Shows the section 111-111 of FIG. 2 on an enlarged scale.
  • the guide 27/2 contains two mutually opposite, trapezoidal cross-section-shaped slide rails 29/2, each with an upper and a lower slide path 30/2, which pass through a pad made of sliding material.
  • the sliding surfaces of a slide 31/2 rest on the slideways, which thereby fixes its position and is displaceable along the rails 29/2.
  • the slide 31/2 carries the support arm 25/2, which is attached to the slide 31/2 with the interposition of a cover plate 32/2 and an insulating plate 33/2 by means of a screw bolt 34/2.
  • the insulating plate 33/2 which has the same length as the slide 31/2, is also shown in part in FIG. 2. From this illustration it can be seen that the slide 31/2 extends for stability reasons over about a third to half the length of the guide 27/2.
  • the guides 27/1 and 27/3 for the two outer support arms 25/1 and 25/3 have a similar structure. As can be seen from Fig. 2, however, they are curved, i.e. the rails 29/1 and 29/3 in question also have a corresponding curvature in plan view.
  • the cover has a slot-shaped electrode passage for each electrode which is adapted to its movement path.
  • the slot-shaped electrode bushings are covered by cover slats 35/1, 36/1, 37/1 to 35/3, 36/3, 37/3 which can be moved along the horizontal movement path, one of which has a passage opening adapted to the electrode cross section.
  • the cover slats close the slot-shaped electrode feedthrough in the cover in every position of the electrode along its path of movement 28/1, 28/2 and 28/3.
  • the slot-shaped electrode leadthrough in the cover 3 visible in the illustration according to FIGS. 4 and 5 is designated 38/1
  • the passage opening in the cover plate 36/1 adapted to the electrode cross section is designated 39/1.
  • the ends of the middle cover lamella 36/1 each overlap one end of the outer cover lamellae 35/1 and 37/1.
  • drivers 40/1 are provided which, when the electrode 4/1 is displaced along the movement path 28/1 and the movement of the middle cover slat 36/1 caused thereby, each take the outer slats along with them and thus Ensure that the electrode bushing 38/1 is completely closed in every position of the electrode 4/1.
  • the solid, lumpy feed material 16 is charged into the receiving space 8 of the charge material preheater 7 by the charging device 12 until a sufficient column 17 has formed. In the area of the connection zone 10, the solid feed material partly reaches the furnace hearth due to the natural angle of repose 41 of the bed.
  • the electrodes 4/1 to 4/3 are now moved in the direction of the charge preheater 7 and the melting process is started by lowering the electrodes in the region of the bed.
  • the liquid metal sump that forms collects in the stove and causes an intensive material and heat exchange through the bath movement in the lowest zone of the charge column.
  • desired metallurgical conversions can also take place, which are controlled by targeted supply of oxygen, coal or aggregates in the area indicated by the burners 15 or by aggregates admixed with the charge.
  • the burner 15 can also be used to introduce additional heat.
  • the feed material 16 of the pouring column 17 sinks down in order to also be melted in the lowest zone.
  • the cross-section of the Interior 8 of the charge material preheater 7 expanded downwards.
  • the electrodes 4/1 to 4/3 are in the position adjacent to the shaft furnace 7, that is to say in the representation according to FIG. 2, in the vicinity or at the left end position of the movement paths 28/1 to 28/3, the radiation energy the arcs are introduced to an increased extent in the lower area of the charge column and thus optimally used for the melting process.
  • the furnace exhaust gases which, due to the extraction via the gas outlet 13, reach the charging material column directly from the arcing areas.
  • the electrodes When a sufficient amount of feed material has melted, the electrodes are moved back into the right end position of the movement paths 28/1 to 28/3 shown in FIG. 2 and the bath is brought to the required tapping temperature.
  • the tapping takes place via the tapping device 21 provided in the bottom of the arc furnace. Part of the metal sump is preferably retained in the furnace vessel for the next melting process.
  • the electrode can be moved horizontally, the arcs can always be brought into the most favorable position with regard to the melting process, the heating of the liquid melting bath and the loading of the furnace walls. Any intermediate positions are possible along the movement paths 28/1 to 28/3 of the electrodes 4/1 to 4/3. In this way it is also possible, during the melting process, to have the arcs burn only on an existing liquid sump immediately adjacent to the still solid material and thus to enable more uniform operating conditions. Since only the relative position of the electrodes within the furnace vessel is important, it is also possible to move the furnace vessel 2 together with the receiving space 8 instead of the electrodes.
  • each of the electrodes 4/1, 4/2 and 4/3 is clamped in a telescopically extendable electrode support arm 51/1, 51/2 and 51/3.
  • the guides 52/1, 52/2 or 52/3 for these electrode support arms can be raised and lowered by means of electrode hoists 26/1, 26/2 or 26/3 and also by a limited angle about vertical axes 53/1, 53 / 2 or 53/3 rotatable.
  • the guides 52/1 to 52/3 are thus each connected to the associated electrode lifting mechanism 26/1 to 26/3 via a connection which is rotatable within a limited angle and is equipped with a drive.
  • the arc electrodes 4/1 to 4/3 are of a triangular arrangement in the plan view in the center of the furnace vessel, as shown in FIG. 7, in one arcuate arrangement adjacent to the receiving space for the cargo and movable back.
  • a limited possibility of rotation (not shown) of each of the two outer support arms 51/1 and 51/3 about their longitudinal axes 54/1 and 54/3 is provided.
  • the outer electrodes 4/1 and 4/3 can be inclined by a small angle, so that in addition to the change in the distance between the electrode tips due to the predetermined movement paths of the electrodes, a change in the distance is possible by inclination.
  • connection zone 10 extends obliquely upwards from the interior 11 of the furnace vessel 2 to the interior 8 of the charge material preheater 7 and a partition 56 provided with gas passage openings 55 is arranged in the expanded region.
  • the hot furnace gases can be introduced into this column over a larger cross section of the charge column 17.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (14)

1. Four à arc (1) comprenant, d'un côté de la carcasse du four (2), une chambre de réception (8) du produit de la charge, qui communique avec l'intérieur (11) de la carcasse du four (2) et qui se trouve au moins en partie dans la zone de rayonnement de l'arc d'au moins une électrode à arc électrique (4/1, 4/2, 4/3), caractérisé en ce que l'électrode à arc électrique (4/1, 4/2, 4/3) et la carcasse du four (2) peuvent coulisser l'une par rapport à l'autre de façon que l'électrode à arc électrique puisse prendre une position centrale dans la carcasse du four (2) ou une position voisine de la chambre de réception (8).
2. Four à arc suivant la revendication 1, caractérisé en ce qu'il est prévu trois électrodes à arc électrique (4/1,4/2, 4/3) qui peuvent être mises en une disposition en triangle, en vue en plan, au milieu de la carcasse du four (2) ou en une disposition en forme d'arc ou linéaire, en vue en plan, à proximité de la chambre de réception (8).
3. Four à arc suivant la revendication 1 ou 2, caractérisé en ce que l'électrode à arc électrique (4/1, 4/2, 4/3) est bloquée dans un bras porte-électrode (25/1,25/2,25/3; 51/1, 51/2, 51/3) qui est relié par une pièce horizontale de guidage (27/1, 27/2, 27/3; 52/1, 52/2, 52/3) à un dispositif de soulèvement de l'électrode (26/1, 26/2, 26/3) et qui peut aller et venir le long de la pièce de guidage sous l'effet d'un dispositif d'entraînement agissant dans deux sens.
4. Four à arc suivant la revendication 1, 2 ou 3, caractérisé en ce que, dans le cas d'au moins deux bras porte-électrodes (25/1, 25/2, 25/3; 51/1, 51/2, 51/3), disposés côte à côte, qui portent respectivement une électrode à arc électrique (4/1,4/2,4/3), au moins les bras porte-électrode extérieurs (25/1, 25/3; 51/1, 51/3) peuvent basculer d'un angle limité dans un plan horizontal.
5. Four à arc suivant la revendication 3 ou 4, caractérisé en ce que le bras porte-électrode (51/1, 51/2, 51/3) est télescopique.
6. Four à arc suivant l'une des revendications 1 à 5, caractérisé en ce que la carcasse du four (2) peut être fermée par un couvercle (3) qui comporte une traversée (38/1) en forme de fente pour une électrode adaptée au trajet de déplacement relatif horizontal (28/1, 28/2, 28/3) entre l'électrode à arc électrique (4/1,4/2,4/3) et le couvercle (3).
7. Four à arc suivant la revendication 6, caractérisé en ce que la traversée (38/1) en forme de fente pour une électrode est recouverte par des lamelles de recouvrement (35/1, 36/1, 37/1 ; 35/2, 35/3) qui peuvent coulisser le long du trajet de déplacement relatif horizontal (28/1, 28/2, 28/3) et dont l'une (36/1, 36/2, 36/3) comporte un orifice de passage adapté à la section transversale de l'électrode et qui ferment, en toute position de l'électrode à arc électrique (4/1, 4/2,4/3), la traversée en forme de fente pour une électrode (38/1) le long du trajet de déplacement relatif (28/1, 28/2, 28/3).
8. Four à arc suivant l'une des revendications 1 à 5, caractérisé en ce que la carcasse du four (2) peut être fermée par un couvercle qui comporte, pour chaque électrode à arc électrique (4/1,4/2, 4/3) susceptible d'être déplacée dans la direction de la chambre de réception (8), deux traversées pour des électrodes dont l'une est prévue dans la région centrale du couvercle et dont l'autre est prévue dans le couvercle en un emplacement voisin de la chambre de réception (8).
9. Four à arc suivant l'une des revendications 1 à 8, caractérisé en ce que le fond (9) de la chambre de réception (8) du produit de la charge est si bas que, lors de la formation d'un bain liquide (18) dans le laboratoire du four, celui-ci s'étend dans la chambre de réception et permet un échange de chaleur direct par convection et par conduction dans la zone la plus basse de la colonne de produit chargé (17).
10. Four à arc suivant l'une des revendications 1 à 9, caractérisé en ce que le fond (9) de la chambre de réception (8) du produit chargé descend vers la sole du four (5).
11. Four à arc suivant l'une des revendications 1 à 10, caractérisé en ce qu'il est prévu, comme chambre de réception (8) du produit de la charge (16), l'intérieur d'un dispositif de préchauffage (7) du produit de la charge qui est en forme de puits et qui est disposé d'un côté de la carcasse du four (2), en ce que l'intérieur de ce dispositif de préchauffage (7) du produit de la charge communique avec dans une région adjacente à son fond (9), avec l'intérieur (11) de la carcasse du four (2) par une zone de liaison (10) par laquelle du produit de la charge peut être amené de la partie inférieure d'une colonne (17) du produit de la charge présente dans le sispositif de préchauffage (7) du produit de la charge à la sole du four (5) et par laquelle des gaz de four chauds peuvent être introduits dans le dispositif de préchauffage (7) du produit de la charge et en ce que le dispositif de préchauffage (7) du produit de la charge comporte dans sa partie supérieure un dispositif de chargement (12) du produit de la charge et une sortie (13) à dispositif d'aspiration pour le gaz du four refroidi par échange de chaleur avec le produit de la charge.
12. Four à arc suivant la revendication 11, caractérisé en ce qu'un brûleur (15), ou une buse, est disposé dans la région de la zone de liaison (10).
13. Four à arc suivant la revendication 11 ou 12, caractérisé en ce que la zone de liaison s'élargit vers le haut en étant inclinée de l'intérieur (11) de la carcasse du four (2) à l'intérieur (8) du dispositif de préchauffage (7) du produit de la charge et, dans la partie la plus élargie, est disposée une cloison qui est munie d'orifices de passage du gaz et qui est destinée à maintenir une colonne (17) de produit de la charge.
14. Four à arc suivant l'une des revendications 1 à 13, caractérisé en ce que la section transversale de la chambre de réception (8) du produit de la charge (16) s'élargit vers le bas.
EP85106662A 1984-06-08 1985-05-30 Four à arc muni d'un espace de chargement sur le côté Expired EP0170809B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT85106662T ATE37947T1 (de) 1984-06-08 1985-05-30 Lichtbogenofen mit einem auf einer seite des ofengefaesses vorgesehenen aufnahmeraum fuer chargiergut.
EP88105416A EP0291680B2 (fr) 1984-06-08 1985-05-30 Four à arc muni d'un espace de chargement sur le côté

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843421485 DE3421485A1 (de) 1984-06-08 1984-06-08 Lichtbogenofen mit einem auf einer seite des ofengefaesses vorgesehenen aufnahmeraum fuer chargiergut
DE3421485 1984-06-08

Related Child Applications (3)

Application Number Title Priority Date Filing Date
EP88105416.7 Division-Into 1985-05-30
EP88105416A Division-Into EP0291680B2 (fr) 1984-06-08 1985-05-30 Four à arc muni d'un espace de chargement sur le côté
EP88105416A Division EP0291680B2 (fr) 1984-06-08 1985-05-30 Four à arc muni d'un espace de chargement sur le côté

Publications (3)

Publication Number Publication Date
EP0170809A2 EP0170809A2 (fr) 1986-02-12
EP0170809A3 EP0170809A3 (en) 1986-10-08
EP0170809B1 true EP0170809B1 (fr) 1988-10-12

Family

ID=6237993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106662A Expired EP0170809B1 (fr) 1984-06-08 1985-05-30 Four à arc muni d'un espace de chargement sur le côté

Country Status (6)

Country Link
US (1) US4617673A (fr)
EP (1) EP0170809B1 (fr)
AT (1) ATE71666T1 (fr)
DE (3) DE3421485A1 (fr)
ES (1) ES8607527A1 (fr)
ZA (1) ZA854041B (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533755A1 (de) * 1985-09-21 1987-04-02 Fuchs Systemtechnik Gmbh Ofengefaess eines lichtbogenofens
AT384669B (de) 1986-03-17 1987-12-28 Voest Alpine Ag Anlage zur herstellung von stahl aus schrott
DE3839095A1 (de) * 1988-11-18 1990-05-23 Fuchs Systemtechnik Gmbh Verfahren zum betrieb eines einschmelzaggregates und einschmelzaggregat fuer dieses verfahren
DE3839096A1 (de) * 1988-11-18 1990-05-23 Fuchs Systemtechnik Gmbh Verfahren zum betrieb eines einschmelzaggregates und einschmelzaggregat fuer dieses verfahren
DE3940558A1 (de) * 1989-12-07 1991-06-13 Fuchs Technology Ag Verfahren zum betrieb eines lichtbogenofens und lichtbogenofen
UA19770A (uk) * 1989-03-02 1997-12-25 Фукс Технологі Аг Електродугова плавильhа піч
DE3906653A1 (de) * 1989-03-02 1990-09-06 Fuchs Technology Ag Einschmelzaggregat mit schachtfoermigem chargiergutvorwaermer
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Also Published As

Publication number Publication date
ZA854041B (en) 1986-01-29
EP0170809A2 (fr) 1986-02-12
DE3421485A1 (de) 1985-12-12
EP0170809A3 (en) 1986-10-08
ATE71666T1 (de) 1992-02-15
DE3565598D1 (en) 1988-11-17
ES8607527A1 (es) 1986-06-01
DE3585234D1 (fr) 1992-02-27
US4617673A (en) 1986-10-14
ES543965A0 (es) 1986-06-01

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