EP1484566A1 - Système automatique pour faire avancer les électrodes dans les fours électriques - Google Patents

Système automatique pour faire avancer les électrodes dans les fours électriques Download PDF

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Publication number
EP1484566A1
EP1484566A1 EP04380121A EP04380121A EP1484566A1 EP 1484566 A1 EP1484566 A1 EP 1484566A1 EP 04380121 A EP04380121 A EP 04380121A EP 04380121 A EP04380121 A EP 04380121A EP 1484566 A1 EP1484566 A1 EP 1484566A1
Authority
EP
European Patent Office
Prior art keywords
electrode
clamp
movable
clamps
regard
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.)
Withdrawn
Application number
EP04380121A
Other languages
German (de)
English (en)
Inventor
Bautista Rodriguez Giner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1484566A1 publication Critical patent/EP1484566A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type 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
    • H05B7/109—Feeding arrangements

Definitions

  • the present invention refers to an automatic system for elongating electrodes in electric furnaces which, by means of a simple mechanism, allows for carrying out the elongation of the electrodes of an electric furnace without needing to interrupt the operation thereof.
  • the current generalized art is the use of large electric furnaces, capable of processing about 140 tons of casting, and with electric outputs of up to 120 megawatts. Castings are obtained with these conditions in less than an hour.
  • the columns making up said electrodes consist of cylindrical parts coupled to one another by means of a threading process, which grants them lengths of about 10 meters and weights of several tons.
  • the electrode is made of graphite and therefore is subject to a natural wear due to sublimation and oxidation. Due to this wear, this is why they must be elongated and even be replaced and changed for new ones.
  • the object of the invention is to eliminate the drawbacks set forth resulting from the time necessary for carrying out the elongation of the electrodes by means of a system which allows for carrying out this elongation in a fairly lesser amount of time and, essentially, without having to stop the operation of the furnace.
  • the electrode or electrodes are held by means of two independent fixing clamps or grips, one of which is fixed whereas the other one is movable along a length of the electrode.
  • These clamps grip the electrode at different heights and are of alternative opening and closure, the movable clamp being able to move with regard to the fixed clamp between positions of maximum and minimum separation, in the second of which they are in a practically consecutive position.
  • the two clamps holding the electrode are connected to one another by means of hydraulic cylinders which cause the upward or downward movement of the movable clamp with regard to the fixed clamp between said positions of maximum and minimum separation.
  • the two clamps can open or close to hold the electrode, the opening and closure thereof and the movement of the movable clamp in either direction occurring in a synchronized manner, such that said movable clamp can sequentially drag the electrode, with regard to the fixed clamp, in the direction of elongation of said electrode.
  • the two clamps are provided with sensors detecting the opened or closed situation of said clamps, as well as the position of the movable clamp with regard to the fixed clamp, the opening and closure of the grips and the upward and downward movements of the movable grip responding to the signals of said sensors, which can be computer-controlled through a PLC.
  • Figure 1 shows an electrode 1 which, according to the system of the invention, is supported or suspended by two clamps, a fixed one which is given reference number 2 and another movable one which is given reference number 3 and which can move along a certain length of the electrode between positions of maximum and minimum separation of the fixed clamp 2.
  • the fixed clamp 2 is supported by an arm 4 shaped in a known manner and is electrically fed in a known manner, by means of cooled cables which can access the fixed clamp 2 through a stiff duct 5.
  • the electric connection of the movable clamp 3 is carried out through a flexible duct 6.
  • the fixed clamp 2 and movable clamp 3 can occupy a position of minimum separation, as shown in Figure 2.
  • Each one of the clamps 2 and 3 can be constituted of two grips, a fixed one 8 and another movable one, which can be actuated, for example, by means of a piston 10 or spring 11.
  • the movable clamp 3 is connected to the movable clamp 2 by means of hydraulic cylinders 12 by means of the actuation of which the movement of the movable clamp 3 with regard to the fixed clamp is achieved.
  • the process begins by opening the movable clamp 3, keeping the fixed clamp 2 closed, to support the electrode 1, as shown in Figure 2. Then, the cylinders 12 are activated to cause the lifting of the movable clamp 3 with regard to the fixed clamp 2, as shown in Figure 3. In the next phase, the movable clamp 3 closes and the fixed clamp 2 opens, according to that shown in Figure 4. After this situation, in which the clamps 2 and 3 are in the position of maximum separation, the cylinders 12 are reactivated to cause the withdrawal thereof and whereby the lowering of the clamp 3 until it reaches the position of minimum separation shown in Figure 5.
  • the movable clamp 3 will be provided with a position detector or sensor with regard to the fixed clamp 2, which can be attained through the run of the hydraulic cylinders 12. Furthermore, the clamps will be provided with sensors indicating the position of the movable grip 9, which can be attained through the actuation pistons 10 or springs 11. Lastly, the movable clamp 3 will be provided with a worn electrode detector 13.
  • the corresponding sensors will provide signals which can be computer-controlled by a PLC, all this such that every time it is necessary to elongate the electrode, when an electrode shortening or wear signal is received, the described sequence occurs automatically.
  • the system of the invention is based on the synchronized operation of the computer-controlled fixing clamps or grips 2 and 3 of the electrode 1, one of these clamps being movable to carry out movements in an upward and downward direction, while the opening and closure of the grips occurs, in order to finally achieve elongation of the electrode with regard to the fixed clamp in the desired direction.
  • the degree of desired elongation is achieved through the number of necessary consecutive elongation sequences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
EP04380121A 2003-06-04 2004-06-02 Système automatique pour faire avancer les électrodes dans les fours électriques Withdrawn EP1484566A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200301327 2003-06-04
ES200301327A ES2259852B1 (es) 2003-06-04 2003-06-04 Sistema automatico de alargamiento de electrodos en hornos electricos.

Publications (1)

Publication Number Publication Date
EP1484566A1 true EP1484566A1 (fr) 2004-12-08

Family

ID=33155460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04380121A Withdrawn EP1484566A1 (fr) 2003-06-04 2004-06-02 Système automatique pour faire avancer les électrodes dans les fours électriques

Country Status (2)

Country Link
EP (1) EP1484566A1 (fr)
ES (1) ES2259852B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224552A1 (de) 2013-11-29 2015-06-03 Sms Siemag Ag Vorrichtung und Verfahren zum Nachsetzen einer Elektrode für einen metallurgischen Ofen
WO2017125645A1 (fr) * 2016-01-20 2017-07-27 Outotec (Finland) Oy Procédé de fonctionnement d'un ensemble équipement à électrodes d'un four à arc électrique, et ensemble équipement à électrodes de four à arc électrique
CN117092706A (zh) * 2023-08-30 2023-11-21 贵州省有色金属和核工业地质勘查局地质矿产勘查院 一种探测铅锌矿的激电测深装置
CN118482579A (zh) * 2023-09-04 2024-08-13 青岛宜博科技股份有限公司 一种电极夹持自适应夹持装置及艾奇逊炉送电车

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR695216A (fr) * 1929-08-27 1930-12-12 Dispositif de montage et de manoeuvre des électrodes d'un four électrique ou d'une cuve à électrolyse
US3247305A (en) * 1962-09-27 1966-04-19 Ass Elect Ind Mounting arrangements for electric furnace electrodes
DE1254296B (de) * 1963-03-08 1967-11-16 Inst Elektroswarki Im J O Pato Vorrichtung zur Elektrodenfuehrung bei elektrischer Blockkopfbeheizung
FR2136965A1 (en) * 1971-05-10 1972-12-29 Zinkovsky Viktor Electrode holder - that can vertically adjust industrial furnace electrodes without damage to them by friction
US4646317A (en) * 1982-12-03 1987-02-24 Elkem A/S Electrode holder system for electrothermic smelting furnaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR695216A (fr) * 1929-08-27 1930-12-12 Dispositif de montage et de manoeuvre des électrodes d'un four électrique ou d'une cuve à électrolyse
US3247305A (en) * 1962-09-27 1966-04-19 Ass Elect Ind Mounting arrangements for electric furnace electrodes
DE1254296B (de) * 1963-03-08 1967-11-16 Inst Elektroswarki Im J O Pato Vorrichtung zur Elektrodenfuehrung bei elektrischer Blockkopfbeheizung
FR2136965A1 (en) * 1971-05-10 1972-12-29 Zinkovsky Viktor Electrode holder - that can vertically adjust industrial furnace electrodes without damage to them by friction
US4646317A (en) * 1982-12-03 1987-02-24 Elkem A/S Electrode holder system for electrothermic smelting furnaces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224552A1 (de) 2013-11-29 2015-06-03 Sms Siemag Ag Vorrichtung und Verfahren zum Nachsetzen einer Elektrode für einen metallurgischen Ofen
WO2015079024A1 (fr) * 2013-11-29 2015-06-04 Sms Siemag Ag Dispositif et procédé permettant de réajuster une électrode pour un four métallurgique
CN105935002A (zh) * 2013-11-29 2016-09-07 Sms集团有限公司 用于调节冶金炉的电极的设备以及方法
CN105935002B (zh) * 2013-11-29 2019-10-22 Sms集团有限公司 用于调节冶金炉的电极的设备以及方法
WO2017125645A1 (fr) * 2016-01-20 2017-07-27 Outotec (Finland) Oy Procédé de fonctionnement d'un ensemble équipement à électrodes d'un four à arc électrique, et ensemble équipement à électrodes de four à arc électrique
CN117092706A (zh) * 2023-08-30 2023-11-21 贵州省有色金属和核工业地质勘查局地质矿产勘查院 一种探测铅锌矿的激电测深装置
CN118482579A (zh) * 2023-09-04 2024-08-13 青岛宜博科技股份有限公司 一种电极夹持自适应夹持装置及艾奇逊炉送电车

Also Published As

Publication number Publication date
ES2259852B1 (es) 2007-10-01
ES2259852A1 (es) 2006-10-16

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