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EP0053200B1 - Elektrode für Lichtbogenschmelzöfen - Google Patents

Elektrode für Lichtbogenschmelzöfen Download PDF

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Publication number
EP0053200B1
EP0053200B1 EP80107523A EP80107523A EP0053200B1 EP 0053200 B1 EP0053200 B1 EP 0053200B1 EP 80107523 A EP80107523 A EP 80107523A EP 80107523 A EP80107523 A EP 80107523A EP 0053200 B1 EP0053200 B1 EP 0053200B1
Authority
EP
European Patent Office
Prior art keywords
electrode according
clamping
shaft
active part
collet
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
EP80107523A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0053200A1 (de
Inventor
Dieter Dr. Zöllner
Claudio Dipl.-Ing. Conradty
Friedrich Rittmann
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.)
Arc Technologies Systems Ltd
Original Assignee
Arc Technologies Systems Ltd
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 Arc Technologies Systems Ltd filed Critical Arc Technologies Systems Ltd
Priority to DE8080107523T priority Critical patent/DE3071765D1/de
Priority to AT80107523T priority patent/ATE22383T1/de
Priority to EP80107523A priority patent/EP0053200B1/de
Priority to CA000390225A priority patent/CA1173482A/en
Priority to FI813636A priority patent/FI813636L/fi
Priority to ZA817978A priority patent/ZA817978B/xx
Priority to AU77694/81A priority patent/AU546162B2/en
Priority to NZ199015A priority patent/NZ199015A/en
Priority to IN1319/CAL/81A priority patent/IN155086B/en
Priority to KR8104570A priority patent/KR870000098B1/ko
Priority to HU813541A priority patent/HU192078B/hu
Priority to YU02797/81A priority patent/YU279781A/xx
Priority to GR66642A priority patent/GR77313B/el
Priority to PT74061A priority patent/PT74061B/pt
Priority to US06/326,068 priority patent/US4481500A/en
Priority to DK532781A priority patent/DK532781A/da
Priority to NO814093A priority patent/NO814093L/no
Priority to DD81235287A priority patent/DD208283A5/de
Priority to ES508108A priority patent/ES8301088A1/es
Priority to TR21916A priority patent/TR21916A/xx
Priority to GB8136351A priority patent/GB2092418A/en
Priority to SU813360407A priority patent/SU1093266A3/ru
Priority to PL23405981A priority patent/PL234059A1/xx
Priority to JP56194313A priority patent/JPS57119493A/ja
Publication of EP0053200A1 publication Critical patent/EP0053200A1/de
Application granted granted Critical
Publication of EP0053200B1 publication Critical patent/EP0053200B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • 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
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • H05B7/085—Electrodes non-consumable mainly consisting of carbon
    • 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
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc

Definitions

  • the invention relates to an electrode for arc melting furnaces, in particular for the production of electrical steel, consisting of a metallic, liquid-cooled upper shaft and a replaceable lower active part made of consumable material, in particular graphite, the connection between the upper shaft and the active part being made by means of a clamping device having clamping jaws , which holds the metal shaft and the active part together.
  • Electrodes for arc melting furnaces are exposed to strong thermal and mechanical stresses.
  • the strong thermal stresses result from the high working temperatures in such arc melting furnaces, especially in the production of electrical steel.
  • scrap dislocations When the electrodes are retracted, large mechanical loads result from contact with scrap and scrap parts that slip into the melt (so-called scrap dislocations).
  • the electrodes are vibrated in an electromagnetic manner, which can assume considerable frequencies and amplitudes.
  • large acceleration forces occur which act on the electrodes as bending or torsional stresses.
  • the overall rough and dusty operation in steel production Because of these conditions, the connection of the shaft to the active part in such electrodes poses considerable difficulties. Nevertheless, it is important to design the connection between the shaft and the active part to be simple, easily detachable and result in low electrical losses.
  • the shaft has a sleeve or the like at its lower end, which has an internal thread.
  • a blind hole with an internal thread is also formed at the upper end of the active part.
  • a screw nipple is screwed into these two internal threads, which preferably consists of the same material as the active part, i.e. primarily made of graphite.
  • An electrode of the type required in the preamble of patent claim 1 has already become known (DE-OS 2811 877), which in principle allows a used active part to be easily detached from the upper shaft and a used active part to be reconnected to the shaft.
  • This known construction is characterized in that the current transfer between the metal shaft and the active part and the detachable connection between the shaft and the active part have been functionally separated.
  • the fastening device of the known electrode requires a special design of the upper end of the active part.
  • the upper end of the active part is namely provided with a specially designed connector, which consists of a round plate, on the underside of which there is an axial collar corresponding to the plate diameter and on the upper side of which there is an extension of smaller diameter which has a radially projecting edge.
  • a tension screw for bracing the connector with the active part is arranged in a central bore of the connector.
  • the upper section of the active part is designed in such a way that it encloses the head of the lag screw and engages in the collar, which is conical at the point of contact. This prevents the upper end of the active part from breaking apart under the action of transverse forces and the tension screw.
  • the fastening device On the side of the shaft, the fastening device comprises a cage in the form of a hollow cylinder, which is provided with several recesses on its circumference at the lower end, into which clamping bodies are inserted. These are radially movable and have the shape of balls or rollers.
  • the cage is connected to a hydraulic cylinder with a piston, through which the cage and with it the clamping bodies can be moved in the axial direction relative to the cylinder.
  • the clamping bodies cooperate with an oblique control edge, so that the clamping bodies are moved radially inward by the control edge when lifting by the hydraulic cylinder, as a result of which they are below an edge of an extension of the connection piece to the plant. This results in a positive locking of the active part with the shaft.
  • the fastening device of the known electrode described is extremely complicated. This results primarily from the necessity that the active part must be provided with a specially designed connection piece which has to be clamped to the upper end of the active part by means of a lag screw. This construction is necessary because the material of the active part is subjected to tension in the selected arrangement. The tensile strength of relevant materials for active parts, especially graphite, is considerably lower than the compressive strength of the materials in question. The arrangement chosen in the known solution with connection piece and tension screw for the active part clearly increases the cost of these electrodes considerably.
  • Another disadvantage of the system is the requirement to have metallic load-bearing parts uncooled as fastening elements in the hot active part of the electrode.
  • an electrode clamping device for conventional electrodes consisting of a series of axially screwable graphite cylinders.
  • the support head of this clamping device has a downwardly tapering bore, the smallest diameter of which is located on the lower end face of the support head is just sufficient to accommodate an electrode stump.
  • Balls are arranged in the annular space which widens upwards around the electrode stump and wedges against the side surfaces of the conical bore and against the electrode stump under the weight of the electrode pulling downwards. This will pinch the electrode. It is disadvantageous with this type of electrode clamping that the entire electrical current flows over the balls, whereby extremely punctiform contact points are formed, which entail very high contact resistances.
  • clamping means are provided, by means of which the clamping jaws can be moved in the axial direction, which pulls the active part in the direction of the metal shaft, and in that the clamping jaws have inclined surfaces, by means of which, during movement or pressurization of the clamping jaws in the axial direction, radial movement or force components of the clamping jaws which clamp the active part can be generated.
  • the invention is based on the fact that the mechanical and electrical contact of the two electrode sections should be as optimal as possible for the reliable operation of a water-cooled combination arc electrode.
  • the clamping devices acting laterally and under pressure on the active electrode part are designed in such a way that when they are tightened in the radial direction, a tensile force is simultaneously generated in the axial direction , in such a way that this tensile force presses the active part of the electrode against the upper shaft, as a result of which an optimal broad-area electrical contact between the two contact surfaces of the electrode parts is achieved.
  • this is done by using a multi-part clamping device which, when clamped, has inclined surfaces sliding against one another, part of the clamping device, which comprises an inclined surface with the component facing upwards, being pulled upwards by appropriate clamping means.
  • a radial force which is directed inwards or outwards, depending on the orientation, and an axially upward force is transmitted to an opposite, inclined surface having a downward-pointing component of another part of the clamping device.
  • the axial tensile force that is exerted on the part of the clamping device with the component of the inclined surface facing upward can be maintained during the operation of the electrode in order to ensure permanent contact between the two electrode parts, as is the case, for example, in FIG happens.
  • the inventive clamping device he especially in contrast to the previously known constructions that work with screw nipples, allows a simple and quick release of a used active part from the shaft. The same applies to attaching an unused active part to the shaft. As a result, the electrodes according to the invention can be operated efficiently, saving considerable set-up times.
  • connection section of the active parts Since it is not necessary to provide the connection section of the active parts with special constructions in the electrodes according to the invention, it is also possible to consume the connection section of the active parts according to the invention without further notice. As a result, considerable material savings or high material utilization compared to the known solutions are achieved.
  • the construction according to the invention also allows cheaper material to be used for the active parts in high-performance electrodes than is currently used for such high-performance electrodes.
  • graphite with the following physical properties is used for high-performance electrodes:
  • the solution according to the invention therefore makes it possible in a considerably simplified manner to functionally separate the power supply between the current-carrying components of the shaft and the active part and the clamping device for mechanically connecting the two components of the electrode. This results in particularly simple and material-appropriate training options for both the electrical connection and the mechanical connection between the shaft and the active part.
  • the clamping device can have a separate cooling system or can be connected to the cooling device of the shaft.
  • the clamping device can also detect the active part in its upper area from the inside and / or outside. The only requirement is that the clamping force essentially places pressure on the material of the active part.
  • the clamping device acts directly on the active part according to the invention, it is only necessary to adjust the active part depending on the type of clamping device by forming fitting points, openings, recesses and grooves.
  • the respective shape of the connection area of the active part can already be produced as such during the manufacture of the active part.
  • the active part can be used in unchanged form or even without post-processing connected to the basic manufacturing process.
  • the clamping device can advantageously be designed as a clamping sleeve.
  • the clamping force is applied to the active part via the outer surface of the clamping sleeve. According to the other possibility, this takes place via the inner surface of the clamping sleeve.
  • the clamping sleeve can either be formed in one piece and provided with a longitudinal slot, or it can be composed of a number of segments.
  • a further specific embodiment of the electrode according to the invention is that the clamping device detects the active part on its outer surface, the current-carrying component of the metal part is arranged within the clamping sleeve of the clamping device and the clamping sleeve is surrounded by a tube, on the inside of which wedge surfaces are arranged which cooperate with wedge surfaces on the clamping sleeve.
  • This embodiment primarily has the advantage that the tube surrounding the clamping sleeve not only serves to control the clamping sleeve, but also effectively protects the overall arrangement against thermal and mechanical attack, after this outer tube can be easily formed by the tube sufficient wall thickness is given and the outside is given a corresponding coating. It is also possible to supply the cooling medium to the individual components of the shaft via this tube in order to cool the tube and these components. This results in a particularly compact structure of this embodiment of the electrode according to the invention.
  • the construction mentioned also has considerable advantages with regard to the design of the active part.
  • the active part does not require any special training for connection to the clamping device. Only to increase safety, it may be necessary to provide the circumferential surface of the active part with a circumferential groove in which the clamping device engages in order to thereby increase the transferable force.
  • the active part can have a flat end face on the connection side. This makes it possible to provide the connection side of the active part with an internally threaded blind hole for screw nipples. In this way, the upper section of the active part designed in this way can easily be supplied for consumption by connecting this upper section to the lower end of an active part to be used using a screw nipple.
  • a further embodiment of the electrode according to the invention is characterized in that the clamping device is arranged within the current-carrying component of the shaft and the clamping sleeve engages the active part on a clamping pin formed thereon.
  • This embodiment is characterized in that the diameter of the shaft can be kept relatively small, so that the outside diameter of the shaft can essentially correspond to the outside diameter of the active part, which is of considerable practical importance.
  • the pressure arrangement comprises a pressure sleeve which lies with its conical inner surface against the correspondingly shaped conical outer surface of the clamping sleeve.
  • a second embodiment consists in the fact that the pressure arrangement comprises a mushroom-shaped tappet, which rests with its conical outer surface on a correspondingly conically shaped inner surface of the clamping sleeve.
  • the directly adjacent connection parts of the clamping device on the one hand and the active part on the other hand can be designed both cylindrical and conical. With a conical design, in addition to the non-positive connection, there is also a partially positive fixing of the components to one another.
  • the effective outer or inner surface of the clamping sleeve has additional projections that engage in corresponding recesses on the active part. It is particularly advantageous if the projections to form a snap-in coupling are mounted in a radially flexible manner when the active part is slid onto the clamping sleeve, which can be achieved by assigning springs to the movable projections.
  • the clamping device can also be controlled hydraulically or pneumatically.
  • the pressure arrangement of the clamping sleeve has hydraulically or pneumatically axially movable wedges for this purpose. These wedges combine positive and positive locking.
  • the pressure arrangement of the clamping sleeve has hydraulically or pneumatically radially movable plungers which act accordingly on the clamping sleeve to generate the clamping force.
  • the current-carrying component can be designed as a solid rod which merges into a contact plate at its lower end.
  • the current-carrying component can be produced in a particularly material-saving manner.
  • the outside of the solid rod can be surrounded by cheaper material, possibly provided with a cooling system, in order to protect the current-carrying solid rod from loads of both thermal and mechanical nature.
  • the contact plate provides a large contact area between the current-carrying component of the shaft and the active part, with the result of effective current transmission at this contact area. For this purpose, it is recommended that the outside diameter of the contact plate corresponds approximately to the outside diameter of the active part.
  • the current-carrying component of the shaft is designed as a tube and the clamping device is arranged within this tube, it is advantageous that the outside diameter of the tube corresponds approximately to the outside diameter of the active part.
  • relevant electrodes consisting of a metallic, liquid-cooled upper shaft and a replaceable lower active part made of consumable material
  • the attached figures and accordingly also their description are limited to the components essential to the invention. Only in FIG. 4 is the shaft of a relevant electrode shown in more detail for the sake of completeness.
  • the clamping device designated overall by 40, surrounds the shaft designated overall by 1.
  • the clamping device 40 comprises a clamping sleeve 41.
  • This clamping sleeve 41 concentrically surrounds the power supply tube 11 of the shaft 1. It has clamping jaws 42 with clamping surfaces 42a formed thereon at its lower end.
  • the clamping jaws 42 of the clamping sleeve 41 can represent separate elements or can be produced by corresponding longitudinal slots in the clamping sleeve 41. All that matters is that the jaws 42 are radially movable.
  • the clamping sleeve 41 is concentrically surrounded by a tube 43, on the inside of which in the region of the clamping jaws 42 are arranged wedge surfaces 43a which interact with wedge surfaces 42b of the clamping jaws 42 in a manner to be described in more detail.
  • a circumferential groove 24 is formed in the lateral surface, into which, as shown, the clamping jaws 42 can engage with their clamping surfaces 42a. In order to make this possible, the clamping sleeve 41 and the outer tube 43 can be moved axially relative to one another.
  • the clamping surfaces 42b and 43a disengage, as a result of which the clamping jaws 42 can move radially outwards. In this position of the jaws 42, the upper end of the active part 2 can be inserted between them.
  • the clamping sleeve 41 and the tube 43 are pushed together, the clamping surfaces 42b and 42a come into engagement, as a result of which the clamping jaws 42 are moved radially inward until their clamping surfaces 42b come into contact with the upper wall surface of the circumferential groove 24 of the active part 2.
  • the clamping sleeve 41 and the tube 43 are then moved upwards together, as a result of which the end face contact surface 23 of the active part 2 comes into electrically conductive contact with the contact surface 14 of the power supply tube 11.
  • the embodiment according to FIG. 2 differs from that according to FIG. 1 primarily in that the current-carrying component of the shaft 1 is designed differently than in the previous constructions. It is designed as a solid rod 15 which merges into a contact plate 16 at its lower end.
  • the outer diameter of the contact plate 16 corresponds approximately to the outer diameter of the active part 2. This not only achieves a very material-saving design of the current-carrying component of the shaft 1, but also a large contact area between the contact plate 16 and the relevant end face 23 of the active part 2 is achieved.
  • this can be surrounded by a possibly cooled protective tube 17 made of a cheaper material than that of the current-carrying component 15, 16.
  • the active part 2 can consist of several sections, two of which are connected to each other by means of a screw nipple 25.
  • the uppermost section of the active part 2 which is to be regarded as an adapter and has the circumferential groove 24, has on its upper end face a blind bore 26 which is provided with an internal thread and is suitable for receiving a screw nipple 25.
  • this section of the active part if it is no longer suitable as an adapter, can be connected to the active part 2 as a section to be consumed and then consumed, as a result of which no material is lost.
  • the clamping device lying inside the power supply pipe 11, designated overall by 50, consists of a clamping sleeve 51 and a pressure sleeve 52 concentrically surrounding it.
  • This pressure sleeve 52 has a conical inner surface 53 which bears on the correspondingly shaped conical outer surface of the clamping sleeve 51 .
  • the active part has at its upper end a conical enlargement to the free end of the clamping pin 27, which is inserted between the clamping sleeve when the jaws have moved apart, whereupon the jaws of the clamping sleeve by a corresponding relative movement between the clamping sleeve 51 and the pressure sleeve 52 Clamping sleeve 51 are brought into the clamping system on the clamping pin 27. Subsequently, the clamping sleeve 51 and the pressure sleeve 52 are moved axially upward together in order to bring the contact surface 23 of the active part 2 into an electrically conductive connection with the contact surface 14 of the power supply tube 11.
  • FIG. 4 relates to an arrangement in which the clamping device designated overall by 60 essentially corresponds to the clamping device according to FIG. However, the design of the shaft 1 and the control of the clamping device 60 are explained in more detail in FIG. 4.
  • the clamping device 60 comprises a clamping sleeve 61 which is connected to an actuating element 62.
  • the clamping sleeve 61 and the actuating element 62 are concentrically surrounded by a pressure tube 63, on the inner surface of which a conical clamping surface 64 is formed in the region of the clamping sleeve 61.
  • the jaws of the clamping sleeve 61 are moved radially by a corresponding relative movement between the clamping sleeve 61 and the conical clamping surface 64.
  • the pressure sleeve 63 with the conical clamping surface 64 is arranged in a stationary manner in that the pressure sleeve 63 is fitted into the power supply pipe 11 with the interposition of electrical insulation.
  • the clamping sleeve 61 is moved axially via the actuating element 62.
  • a mechanical-hydraulic actuating device is arranged, which is denoted overall by 100.
  • This consists of a cylinder 101 in which a piston 102 is slidably mounted. This piston 102 is connected to the pull rod 62.
  • a spring 103 is clamped between the piston 102 and a stationary stop of the cylinder 101 in such a way that it always tries to pull the actuating element 62 and with it the active part 2 upwards via the clamping sleeve 61.
  • This coating 18 consists of a suitable material that withstands the prevailing thermal and mechanical stresses.
  • the electrode is held in a feedthrough in the lid of the furnace by a holding device which acts on the shaft 1 and is designated overall by 200.
  • This holding device 200 can be designed in any manner and therefore not to be described in more detail.
  • FIG. 5 shows the clamping device 60 according to FIG. 4 in detail. 5 that the pressure sleeve 63 itself can be made of an electrically insulating material, so that the pressure sleeve 63 can rest directly on the power supply pipe.
  • the conical clamping surface 64 is designed as a separate component and is connected in a suitable manner to the pressure sleeve 63.
  • the clamping device which is designated as a whole by 70, also lies within the power supply tube 11 of the shaft 1, but, in contrast to the construction described above, engages in a correspondingly shaped blind hole 21 with an undercut clamping surface 22 in the active part 2.
  • the clamping device 70 has an actuating element 71 which is shaped like a mushroom at its end and is axially movable.
  • the clamping sleeve 72 is located at the lower end of a stationary tube 73, which is electrically isolated from the power supply tube 11 of the shaft 1 by the interposition of insulation or due to the formation of an insulating material.
  • the clamping jaws of the clamping sleeve 72 are moved radially outwards, while when the actuating element 71 is moved downwards, the clamping jaws of the clamping sleeve 72 are movable radially inwards. In the radially inwardly moved position of the clamping jaws of the clamping sleeve 72, the clamping device 70 can be inserted into the blind hole 21 of the active part 2.
  • the actuating element 71 is then moved upward, so that the clamping jaws of the clamping sleeve 72 move outwards, as a result of which the clamping surfaces 74 of the clamping sleeve 72 engage behind the undercut clamping surface 22 of the blind hole 21 of the active part 2. Thereafter, the actuating element 71 is moved upwards until the contact surface 23 of the active part 2 comes into contact with the contact surface 14 of the power supply tube 11 of the shaft 1, in order in this way to establish the electrical connection between the current-carrying component of the shaft 1 and the active part 2 .
  • the main focus is on the fact that the clamping force exerted by the respective clamping device directly on the active part essentially stresses the material of the active part.
  • the active part is subjected to tension due to its own weight in the usual way.
  • the current-carrying components of the arrangement consist of a suitable electrically conductive material, such as. B. copper or a corresponding metal alloy. Both the current-carrying and the other components of the shaft are cooled accordingly and protected against thermal and mechanical overloading by means of coatings.
  • the parallel guides used between the individual components can be coated or coated with graphite or similar high-temperature-resistant lubricating materials in order to ensure good sliding conditions even at high temperatures and high mechanical loads.
  • the coatings in question expediently consist of high-temperature-resistant, ceramic materials.
  • the active parts consist primarily of graphite.

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  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Luminescent Compositions (AREA)
  • Clamps And Clips (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Steroid Compounds (AREA)
  • Liquid Crystal Substances (AREA)
  • Electric Stoves And Ranges (AREA)
EP80107523A 1980-12-02 1980-12-02 Elektrode für Lichtbogenschmelzöfen Expired EP0053200B1 (de)

Priority Applications (24)

Application Number Priority Date Filing Date Title
DE8080107523T DE3071765D1 (en) 1980-12-02 1980-12-02 Arc furnaces electrode
AT80107523T ATE22383T1 (de) 1980-12-02 1980-12-02 Elektrode fuer lichtbogenschmelzoefen.
EP80107523A EP0053200B1 (de) 1980-12-02 1980-12-02 Elektrode für Lichtbogenschmelzöfen
CA000390225A CA1173482A (en) 1980-12-02 1981-11-17 Electrode for electric arc furnaces
FI813636A FI813636L (fi) 1980-12-02 1981-11-17 Elektrod foer ljusbaogssmaeltugn
ZA817978A ZA817978B (en) 1980-12-02 1981-11-17 Electrode for electric arc furnaces
AU77694/81A AU546162B2 (en) 1980-12-02 1981-11-20 Electrode for arc furnace
NZ199015A NZ199015A (en) 1980-12-02 1981-11-20 Arc furnace electrode:active portion attachment
IN1319/CAL/81A IN155086B (pt) 1980-12-02 1981-11-24
HU813541A HU192078B (en) 1980-12-02 1981-11-26 Electrode for arc furnaces
KR8104570A KR870000098B1 (en) 1980-12-02 1981-11-26 Electrode for electric arc furnaces
GR66642A GR77313B (pt) 1980-12-02 1981-11-27
YU02797/81A YU279781A (en) 1980-12-02 1981-11-27 Electrode for electric arc furnaces
US06/326,068 US4481500A (en) 1980-12-02 1981-11-30 Electrode for electric arc furnaces
PT74061A PT74061B (de) 1980-12-02 1981-11-30 Elektrode fuer lichtbogenschmelzoefen
NO814093A NO814093L (no) 1980-12-02 1981-12-01 Elektrode for lysbueovn
DD81235287A DD208283A5 (de) 1980-12-02 1981-12-01 Elektrode fuer lichtbogenschmelzoefen
ES508108A ES8301088A1 (es) 1980-12-02 1981-12-01 "perfeccionamientos en la fabricacion de electrodos para hornos de arco electrico".
TR21916A TR21916A (tr) 1980-12-02 1981-12-01 Elektrikli ark firinlari icin elektrod
DK532781A DK532781A (da) 1980-12-02 1981-12-01 Elektrode til lysbuesmelteovne
GB8136351A GB2092418A (en) 1980-12-02 1981-12-02 Electrode for an arc furnace
SU813360407A SU1093266A3 (ru) 1980-12-02 1981-12-02 Держатель электрода дуговой электропечи
PL23405981A PL234059A1 (pt) 1980-12-02 1981-12-02
JP56194313A JPS57119493A (en) 1980-12-02 1981-12-02 Electrode for arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80107523A EP0053200B1 (de) 1980-12-02 1980-12-02 Elektrode für Lichtbogenschmelzöfen

Publications (2)

Publication Number Publication Date
EP0053200A1 EP0053200A1 (de) 1982-06-09
EP0053200B1 true EP0053200B1 (de) 1986-09-17

Family

ID=8186916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107523A Expired EP0053200B1 (de) 1980-12-02 1980-12-02 Elektrode für Lichtbogenschmelzöfen

Country Status (24)

Country Link
US (1) US4481500A (pt)
EP (1) EP0053200B1 (pt)
JP (1) JPS57119493A (pt)
KR (1) KR870000098B1 (pt)
AT (1) ATE22383T1 (pt)
AU (1) AU546162B2 (pt)
CA (1) CA1173482A (pt)
DD (1) DD208283A5 (pt)
DE (1) DE3071765D1 (pt)
DK (1) DK532781A (pt)
ES (1) ES8301088A1 (pt)
FI (1) FI813636L (pt)
GB (1) GB2092418A (pt)
GR (1) GR77313B (pt)
HU (1) HU192078B (pt)
IN (1) IN155086B (pt)
NO (1) NO814093L (pt)
NZ (1) NZ199015A (pt)
PL (1) PL234059A1 (pt)
PT (1) PT74061B (pt)
SU (1) SU1093266A3 (pt)
TR (1) TR21916A (pt)
YU (1) YU279781A (pt)
ZA (1) ZA817978B (pt)

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DD208283A5 (de) 1984-03-28
SU1093266A3 (ru) 1984-05-15
AU7769481A (en) 1982-06-10
KR870000098B1 (en) 1987-02-10
ES508108A0 (es) 1982-11-16
GR77313B (pt) 1984-09-11
ES8301088A1 (es) 1982-11-16
NZ199015A (en) 1985-07-12
NO814093L (no) 1982-06-03
ZA817978B (en) 1982-10-27
PL234059A1 (pt) 1982-07-19
JPS57119493A (en) 1982-07-24
PT74061B (de) 1983-05-11
AU546162B2 (en) 1985-08-15
ATE22383T1 (de) 1986-10-15
PT74061A (de) 1981-12-01
HU192078B (en) 1987-05-28
EP0053200A1 (de) 1982-06-09
IN155086B (pt) 1984-12-29
CA1173482A (en) 1984-08-28
YU279781A (en) 1983-10-31
GB2092418A (en) 1982-08-11
KR830007888A (ko) 1983-11-07
FI813636L (fi) 1982-06-03
DE3071765D1 (en) 1986-10-23
US4481500A (en) 1984-11-06
TR21916A (tr) 1985-11-15
DK532781A (da) 1982-06-03

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