EP2883418A1 - Device and method for changing at least one electrode of a melt-metallurgical vessel - Google Patents
Device and method for changing at least one electrode of a melt-metallurgical vesselInfo
- Publication number
- EP2883418A1 EP2883418A1 EP13762769.1A EP13762769A EP2883418A1 EP 2883418 A1 EP2883418 A1 EP 2883418A1 EP 13762769 A EP13762769 A EP 13762769A EP 2883418 A1 EP2883418 A1 EP 2883418A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- station
- pivoting
- stations
- changing
- 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.)
- Granted
Links
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
- H05B7/10—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
- H05B7/102—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc specially adapted for consumable electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49718—Repairing
- Y10T29/49721—Repairing with disassembling
- Y10T29/4973—Replacing of defective part
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
Definitions
- the invention relates to a device and a method for changing at least one electrode of a melt metallurgical vessel, which has a receptacle for melt and for covering the receptacle a vessel lid with an opening per electrode, wherein the at least one electrode is positionable by means of at least one electrode holder and the vessel lid in that at least one electrode and the at least one electrode holder can furthermore be raised by means of a lifting and pivoting device and can be pivoted laterally about a vertical axis of rotation.
- the rapid replacement of used electrodes is essential for an energy-efficient and time-saving smelting process in a smelting metallurgical vessel, in particular an electric arc furnace, and is increasingly coming into focus with the ever-increasing performance requirements for smelting plants and the constant increase in energy.
- Electrical energy is introduced into the molten material, usually in the form of metal scrap, via the electrodes, whereby the electrode material, which usually consists of graphite, is consumed.
- melt metallurgical plant here an electric arc furnace plant with a liftable and pivotable furnace lid and one to two
- Melting vessels comprises.
- a cassette rotatable about its vertical center axis, which has cylindrical openings for receiving used electrodes and offset therefrom further cylindrical openings for holding new electrodes.
- the cassette is here together with its central rotating mechanism and several below the cartridge arranged and engaging in the cylindrical openings lifting cylinders for lowering the used
- Electrode pieces and for lifting the new electrodes completely in the swivel range of the furnace lid are Electrode pieces and for lifting the new electrodes completely in the swivel range of the furnace lid.
- the object is for the device for changing at least one electrode of a melt metallurgical vessel, which has a receptacle for melt and to cover the receiving device a vessel lid with an opening per electrode, wherein the at least one electrode by means of at least one electrode holder can be positioned and the vessel lid in that at least one electrode and the at least one electrode holder are liftable by means of a lifting and pivoting about a vertical axis of rotation, achieved in that at least two Elektroden strigtorio- are present in addition to the receiving device, either side by side in a
- Pivoting range of the lifting and pivoting device are arranged on a circular path about the axis of rotation or alternately into a Pivoting range of the hub pivoting device can be brought to the circular path about the axis of rotation.
- the at least two electrode change stations are arranged next to one another in a swivel range of the lifting / swiveling device on a circular path around the axis of rotation, then only the electrode (s) and the electrode holder move over them, optionally also the vessel lid.
- the electrode changing stations are fixed units that can be formed from simple mechanical holders. Maintenance is rarely, if not at all, necessary, and may, for example, be carried out simultaneously with necessary maintenance of the vessel lid.
- Pivoting range of the lifting and pivoting device can be brought to the circular path about the axis of rotation, so the mechanism for this introduction of a change electrode station in the pivoting range is outside the pivoting range and is thus removed from increased stress by particles.
- Such an arrangement is also very low maintenance and also easily accessible to the maintenance personnel.
- the tube lid itself is preferably not moved with the at least one electrode and the / the electrode holder (s) when changing electrodes.
- the vessel lid can also be moved, since any movable mechanism of the device for changing at least one electrode is outside the pivoting range.
- a molten metallurgical vessel with a device according to the invention has been proven, wherein the device comprises a movable mechanism which is arranged outside the pivoting range of the lifting-pivoting device and by means of which at least two electrode changing stations can be brought in alternation in the pivoting range of the lifting and pivoting device on the circular path about the axis of rotation.
- the molten metallurgical vessel is preferably an electric arc furnace.
- the melt-metallurgical vessel may also be ladle furnaces or similar melt-metallurgical vessels operated with electrodes or self-consuming / consuming energy transfer devices.
- the at least two electrode changeover stations of the device are identical.
- Particularly preferred is an education or at least lining both electrode changing stations from / with refractory material, so that hot remnants of electrodes can be safely parked in each electrode change station.
- a lining of an electrode changing station with in particular refractory elastic fiber material has been proven to reduce the mechanical stress on the remaining pieces of the electrode (s) when stopping and to damp their impact in the electrode changing station.
- a lining can also be designed in the form of a refractory metallic clamping device which locks the parked residual pieces. It has proved to be advantageous for the device if a first electrode change station of the at least two electrode change stations forms a storage station for a remainder of the at least one electrode and if a second electrode change station of the at least two electrode change stations, a placement station for holding at least one spare electrode by means of at least one Electrode holder is receivable forms. In this way, the hot leftover pieces can initially remain in the storage station and cool down to the extent that their further processing is possible without difficulty. A loss of time in the assembly of the electrode holder with the replacement electrodes does not arise because the replacement electrode (s) are provided by a further electrode exchange station.
- the first and second electrode changing stations of the device are set up to alternately form the parking station and the loading station. Remaining pieces of electrodes remaining in an electrode changing station used as storage station can be directly mechanically connected to replacement electrodes and reused for the next required electrode change, the storage station now holding the next replacement electrode and thus now functioning as a placement station.
- At least two, in particular three, electrodes are present and on the circular path between the receiving device and the at least two electrode changing stations a Nachsetzsta- tion is arranged, which is a refractory horizontal plane to
- the at least two electrode changing stations are connected to a vertical exchange unit rotation axis, which is set up to pivot the electrode change stations horizontally into the pivoting range of the lifting and pivoting device.
- the axis of rotation of the change unit itself is outside the swivel range and thus protected from particles.
- At least one assembly unit for the mechanical connection of the remaining piece of the at least one electrode with at least one electrode extension piece is assigned to the at least two electrode changing stations of the device.
- This assembly unit may comprise a robot which automatically forms the mechanical connection between the respective remaining piece and an electrode extension piece, wherein still hot pieces of remnants can be reused.
- the assembly unit comprises a removal device for removing the respective remainder piece from the storage station in order to mechanically connect it manually to an electrode extension piece.
- the object is achieved for the method for changing at least one electrode of a melt-metallurgical vessel by means of a device according to the invention and with the following steps:
- Electrode extension piece forming a further replacement electrode
- the first electrode changing station can again act as a storage station and the second electrode exchange station again as a loading station.
- the second electrode change station can also act as a stop station and the first electrode change station as a loading station. This is particularly preferred if the remaining pieces are already connected in the region of the electrode exchange station with electrode extension pieces.
- the first and second electrode change stations then act alternately as a stopping station.
- the method according to the invention enables a fast, efficient and resource-saving operation of the device according to the invention which, due to its low maintenance requirement, minimizes interruptions in the melt operation. Residual pieces of the electrode (s) are reused and finally applied completely. When stopping remnants and picking up the replacement electrode (s), it is preferable if the electrode holder is lowered or raised as needed by means of the lifting and pivoting device.
- first electrode changeover station is pivoted about the exchange unit rotation axis from a position within the pivoting range of the lifting pivoting device to a position outside the pivoting range of the lifting / pivoting device and at the same time the second electrode changeover station is rotated about the exchange units.
- Rotating axis is pivoted from a position outside the pivoting range of the Hub-pivoting device into a position within the pivoting range of the Hub-pivoting device.
- a loss of time during the assembly of the electrode holder with the replacement electrodes does not arise because the replacement electrode (s) are provided by a further electrode replacement station.
- the arrangement of the exchange unit rotation axis outside the pivoting range of the Hub-Schwenkvorplatz or the vessel lid has a favorable effect, i. lengthening, to the maintenance cycles of the electrode changing stations.
- lifting and pivoting of the unevenly long remaining pieces of the electrodes and the at least one electrode holder about the axis of rotation preferably takes place in the direction of the set-up station arranged between the receiving device and the at least two electrode changing stations, the at least one electrode holder being opposite the held electrodes is displaced such that the remaining pieces are leveled with their ends facing away from the at least one electrode holder on the horizontal plane of the Nachsetzstation and wherein subsequently pivoting and lowering the leveled electrodes and the at least one Electrode holder takes place about the axis of rotation in the direction of the receiving device.
- the plane thus serves to level or level the free ends of the electrodes, which in operation protrude through the vessel lid into the receptacle, to maintain a uniform melting operation.
- FIGS. 1 to 5 are intended to exemplify devices according to the invention on melt-metallurgical vessels and methods for their operation. To show:
- Figures 1 to 3 schematically an electric arc furnace with a first device from above; 4 shows a partial section through the electric arc furnace; and
- FIG. 5 shows schematically an electric arc furnace with a second device from above.
- the melt metallurgical vessel 1 comprises a receiving device 2 for melt (see also FIG. 4, which shows a partial section IV). IV through the electric arc furnace) and to cover the receiving device 2, a vessel lid 3, each with an opening 3a per electrode 4.
- the electrodes 4 are each positioned by means of an electrode holder 5.
- the electrodes 4 and the electrode holder 5, optionally further the vessel lid 3, can be raised and pivoted laterally about a vertical axis of rotation 6a.
- Pivoting range S (see FIG. 3) of the stroke-pivoting direction 6 are arranged on a circular path about the axis of rotation 6a.
- the electrode changing stations 7, 7 each have three openings 7a, which can receive replacement electrodes or remnants of electrodes 4.
- Electrode exchange station 7 which acts as a storage station, positioned and lowered the electrode holders 5.
- the still heated remnants 4a of the electrodes 4 slide into the openings 7a of the first electrode exchange station 7.
- the electrode holders 5 are raised and further pivoted in the direction of the second electrode exchange station ", which acts here as Be Industriesungsstation and in whose openings 7a" are replacement electrodes 4 ".
- the melt-metallurgical process can be continued.
- the remaining pieces 4a are mounted on electrode extension pieces, so that further replacement electrodes are formed. This can be done in the region of the first electrode change station 7 or even after removal of the cooled residual pieces 4a thereof at a different location. These can now be provided, for example, in the first electrode changing station 7, which subsequently acts as a loading station. But also a renewed use of the second electrode change station 7 "as a placement station is possible.
- the replacement electrodes 4 are also burned, the remaining pieces are deposited in the area of the first or second electrode changeover station 7, 7" and the replacement electrodes are received in the region of the respective other electrode change station 7, 7 ".
- the two electrode change stations 7, 7 are fixedly installed in the first device shown in FIGS. 1 to 3 and have no moving parts, so that no intensive maintenance activities are necessary.
- the free ends 40 of the electrodes 4 can be brought to the same level by means of the re-placement station 8.
- the electrode holders 5, including the electrodes 4 are raised and swiveled over the re-placement station 8.
- the electrode holders 5 are lowered, each electrode 4 is released and placed on a horizontal plane of the re-placement station 8.
- the electrode holders 5 are then again connected to the mutually leveled electrodes 4, lifted and pivoted over the vessel lid 3.
- FIG. 5 shows schematically a melting metallurgical vessel 1 in the form of an electric arc furnace with a second device for changing the electrodes 4 from above.
- the same reference numerals as in FIGS. 1 to 4 designate the same elements.
- two electric changeover stations 7, 7 are present here, which change into the
- Pivoting range S of the lifting-pivoting device 6 can be brought to the circular path about the axis of rotation 6a.
- an exchange unit rotation axis 9 is present, around which the first
- Electrode exchange station 7 and the second electrode change station 7 are rotatable and can be introduced alternately into the swivel range S of the lifting swivel device 6. Due to the arrangement of the movable mechanism of the swap unit rotation axis 9 outside the swivel range S, the second direction particularly low maintenance and overall easily accessible.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012216847.8A DE102012216847A1 (en) | 2012-09-20 | 2012-09-20 | Apparatus and method for changing at least one electrode of a melt metallurgical vessel |
PCT/EP2013/068418 WO2014044548A1 (en) | 2012-09-20 | 2013-09-06 | Device and method for changing at least one electrode of a melt-metallurgical vessel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2883418A1 true EP2883418A1 (en) | 2015-06-17 |
EP2883418B1 EP2883418B1 (en) | 2016-08-31 |
Family
ID=49182218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13762769.1A Not-in-force EP2883418B1 (en) | 2012-09-20 | 2013-09-06 | Device and method for changing at least one electrode of a melt-metallurgical vessel |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150237685A1 (en) |
EP (1) | EP2883418B1 (en) |
DE (1) | DE102012216847A1 (en) |
MX (1) | MX2015003600A (en) |
RU (1) | RU2015114332A (en) |
WO (1) | WO2014044548A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3612739A (en) * | 1970-02-05 | 1971-10-12 | Simon M Korneff | Dual electric furnace facility |
AT314109B (en) * | 1970-10-14 | 1974-03-25 | Leybold Heraeus Verwaltung | Device for electro-slag remelting of consumable electrodes |
SE417052B (en) | 1979-05-08 | 1981-02-16 | Skf Ab | SET AND DEVICE FOR CHANGING ELECTRODES IN A LIGHT BAG OVEN |
ATE14816T1 (en) * | 1981-03-24 | 1985-08-15 | Krupp Gmbh | HIGH CURRENT LINE SYSTEM FOR ELECTRIC OVENS. |
SE431604B (en) * | 1982-06-29 | 1984-02-13 | Asea Ab | DEVICE FOR POSITIONING OF ELECTRODES ON LIGHT BAGS |
DE3427904A1 (en) * | 1984-07-28 | 1986-02-06 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen | LIFTING AND LOWERING DEVICE FOR A DEVICE FOR ADJUSTING THE ELECTRODES OF AN ELECTRIC ARC FURNACE AND METHOD FOR OPERATING THE DEVICE |
DE3537326A1 (en) * | 1985-10-19 | 1987-04-30 | Bayerische Motoren Werke Ag | FULLY AUTOMATIC UNDER COUPLING WELDING SYSTEM |
DE10332866A1 (en) * | 2002-08-20 | 2004-03-04 | Sms Demag Ag | Double furnace system for the production of steel materials |
DE102006041421A1 (en) * | 2006-09-04 | 2008-03-06 | Fuchs Technology Ag | Melting furnace, in particular electric arc furnace |
DE102010048647A1 (en) * | 2010-10-15 | 2012-01-19 | Fuchs Technology Holding Ag | Gripper for holding electrode of electric arc furnace, has several claws engaged with claw engaging element at engagement position in which distance between free end and longitudinal axis of base is larger than half of element diameter |
-
2012
- 2012-09-20 DE DE102012216847.8A patent/DE102012216847A1/en not_active Ceased
-
2013
- 2013-09-06 MX MX2015003600A patent/MX2015003600A/en not_active Application Discontinuation
- 2013-09-06 US US14/429,717 patent/US20150237685A1/en not_active Abandoned
- 2013-09-06 RU RU2015114332A patent/RU2015114332A/en not_active Application Discontinuation
- 2013-09-06 EP EP13762769.1A patent/EP2883418B1/en not_active Not-in-force
- 2013-09-06 WO PCT/EP2013/068418 patent/WO2014044548A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014044548A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2883418B1 (en) | 2016-08-31 |
MX2015003600A (en) | 2015-06-05 |
US20150237685A1 (en) | 2015-08-20 |
WO2014044548A1 (en) | 2014-03-27 |
RU2015114332A (en) | 2016-11-10 |
DE102012216847A1 (en) | 2014-03-20 |
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