EP0031307B1 - Vorrichtung zur Führung des Stromes zwischen Elektrolyseöfen - Google Patents

Vorrichtung zur Führung des Stromes zwischen Elektrolyseöfen Download PDF

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Publication number
EP0031307B1
EP0031307B1 EP80810401A EP80810401A EP0031307B1 EP 0031307 B1 EP0031307 B1 EP 0031307B1 EP 80810401 A EP80810401 A EP 80810401A EP 80810401 A EP80810401 A EP 80810401A EP 0031307 B1 EP0031307 B1 EP 0031307B1
Authority
EP
European Patent Office
Prior art keywords
anode
cell
furnace
conductor
cathode
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
EP80810401A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0031307A1 (de
Inventor
Hans Pfister
Otto Knaisch
Jean-Marc Blanc
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Publication of EP0031307A1 publication Critical patent/EP0031307A1/de
Application granted granted Critical
Publication of EP0031307B1 publication Critical patent/EP0031307B1/de
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars

Definitions

  • the invention relates to a device for guiding the current from the cathode of an optionally encapsulated and transverse electrolysis furnace to the anode of adjacent electrolysis furnaces via cathodically connected carbon blocks, cathode bars and busbars (individual conductors) located in an electrolysis bath.
  • busbar guides between two transverse electrolysis furnaces conduct the furnace current from the cathode bars by means of busbars to the sides of the furnace parallel to the cathode bars and from there via connecting rails to the adjacent electrolysis oven.
  • the connecting rails are connected to fixed or vertically movable risers on the adjacent furnace, via which the furnace flow is fed to the movable or fixed crossmember.
  • the furnace current flows from the traverse via anode rods to the individual anodes.
  • the risers are arranged on the longitudinal or transverse sides of the furnace.
  • the current rail guides created in this way have considerable disadvantages.
  • the busbars around the electrolysis tub and the risers result in a large voltage drop, especially in the case of wide furnace designs.
  • Working on the furnace, in particular changing the anodes with the anode rods is considerably hindered by the risers placed on the longitudinal or transverse sides of the furnace.
  • there is a loss of current when changing the anodes since the current flow is not balanced. Difficulties arise again and again when short-circuiting.
  • the cathodic busbars have the disadvantage that, for purely practical reasons, they are not built in accordance with the shape required by electro-theory. This leads to equalizing currents in the busbars and also in the cathode or in the liquid bath. These equalizing currents are undesirable and have a negative effect on the furnace.
  • the further current flow from the traverse to the anode also has considerable disadvantages.
  • the effort to connect the anode rod and anode in the anode abutment, such as rod straightening, cleaning and welding, as well as for transportation, is very high, and handling is very accident-prone.
  • the anode can only be replaced together with the anode rod, which in turn makes tight encapsulation of the furnace difficult.
  • the loss of current in the anode rod itself cannot be overlooked.
  • the inventor has set itself the goal of developing a device for conducting current between two electrolysis furnaces, which does not have these disadvantages and, above all, provides economic advantages.
  • the object is achieved in that individual conductors are arranged under an electrolysis furnace and an adjacent furnace, the individual conductors under the electrolysis furnace each cathode bar of the electrolysis furnace remote from the adjacent furnace with a compensating conductor assigned to the adjacent furnace and the individual conductors under the neighboring furnace each near this furnace Connect the cathode bar of the electrolysis furnace to the compensating conductor of another neighboring electrolysis furnace.
  • two cathode bars can be connected to a single conductor and thus connected to the compensating conductor.
  • the furnace flow is conducted from one furnace to the adjacent furnace in the shortest, practically feasible way.
  • the single conductors with the same cross-section and length result in a voltage rail guide between the two furnaces, regardless of whether each bar connection is connected to a single conductor or whether two bar connections combined on one long side of the furnace are connected to a single conductor.
  • the conductor rail guide according to the invention has no influence on the installation options for center, cross or point feeder operation.
  • When changing the anode there are no obstacles due to fixed risers placed on the long sides of the furnace or in the corners of the furnace.
  • a furnace that runs out of an ingot window causes the maximum failure of two individual conductors.
  • the furnace compensation conductor mentioned above is preferably arranged in a ring at the height of the trough around the electrolysis furnace.
  • the equalizer compensates for current irregularities. Among other things, it has a direct effect on the current balance when changing the anode in the adjacent furnace and at the same time serves as a compensation conductor for the cathode of the electrolysis furnace. Therefore there is no loss of power when changing the anode.
  • the compensating conductor also serves as a current guide rail during the short-circuiting of the neighboring furnace. It can also be used to place the work surface around the stove.
  • the compensating conductor enables the connection to the anode via a flexible current band, which is preferably attached as close as possible to the anode.
  • the anode is advantageously provided according to the invention with a current-conducting yoke, which is easily detachably connected to the anode holder and the current band.
  • the anode width itself is preferably chosen so that it corresponds to twice the width of a carbon block element.
  • the furnace current thus flows from two individual conductors to an anode of the subsequent cell.
  • This anode design enables the anode holding device to remain on the furnace and, for example, to be fixed to the crossbar. This results in the possibility of a continuous vertical up and down movement of the anode holder by means of a motor, a hydraulic, a pneumatic or the like drive. The vertical movement follows the erosion at the anode evenly so that the cheapest interpolar distance is always maintained between the anode and cathode. This eliminates the anode measurement.
  • control unit for this vertical movement is a computer which receives the current data from the anode and cathode and compares them with setpoints. If the voltage rises above a certain limit value, the interpolar distance is automatically reduced by lowering the anode.
  • the anode holder is set in motion vertically upwards, this process preferably being interrupted after the anode remnant has been pulled out of the crust.
  • the crust is given time to close without emissions escaping into the hall. Only when the crust has completely closed is the anode remnant removed further. Since the encapsulation in ovens can advantageously be very tight with this current routing and this design of the anode holding device, the environmental pollution caused by the exhaust air is reduced to a minimum.
  • the encapsulation preferably consists of hinged plates or the like. Plates, each anode being assigned its own cover plate. By lifting the anode remnant, this plate is opened, while the rest of the furnace remains covered.
  • Assigns e.g. B. a handrail a notch, in which the yoke of the anode and the current band is inserted, so it has proven to be inexpensive 6 to put the handrail a clamping sleeve with an internal thread. After inserting the yoke and the current band, this clamping sleeve is rotated over the notch and thus clamps the yoke and current band.
  • a sleeve is fastened to the crossmember, which has an indentation in its end region remote from the crossmember, in which the yoke and current band are placed.
  • the yoke and current band are fixed by inserting a press bolt into the sleeve.
  • the clamping sleeve or pressing bolt can preferably be moved by means of a pneumatic, hydraulic or motor device.
  • a trough 11 of an electrolysis furnace 10 is lined with insulating material 12 at the bottom and with coal edge blocks 13 at the edge.
  • Cathodically connected carbon blocks 30 are supported on the insulating material 12, from which the current is derived in the direction x via cathode bars 31, 32.
  • Aluminum 15 deposited from an electrolyte 14 collects on the carbon blocks 30.
  • Anodes 16 are immersed in the electrolyte 14 and are attached to a cross member 18 via anode holding devices 17.
  • the trough 11 is encapsulated with the cover plate 22 articulated on the cross member 18 by means of a piano hinge 21.
  • the individual conductors 33, 34 are connected to a compensating conductor 35 surrounding them.
  • the current rail guidance from the cathode of the electrolysis furnace 10 to the compensating conductor 35 of the furnace 10a is carried out for each coal block 30 or for each cathode bar 31, 32 of the furnace 10. If the furnace 10a is short-circuited, the compensating conductor 35 serves as a current-carrying rail at the connection points 40. Further short-circuit points are denoted by 42, 43.
  • a first gradation of the electrical furnace calcination is achieved in that the individual conductors 33, 34 are short-circuited at points 42, 43.
  • a second electrical gradation for the furnace calcination is achieved by short-circuiting the furnace at the connection points 40.
  • the current supply from the compensating conductor 35 of the furnace 10a takes place to the anodes 16 via preferably flexible current strips 36 and from the anodes 16 of the furnace 10a via its cathode to a next furnace 10b in the manner described.
  • the anodes 16 are fixed to the anode holding device 17 by means of a yoke 38.
  • the anode holding device 17 according to FIGS. 4, 5 consists of a holding rod 23, around which a clamping sleeve 24 with an internal thread is movably arranged.
  • the end of the holding rod 23 facing the anode 16 has a notch 25, in which the yoke 38 is hung and the current band 36 is inserted.
  • the clamping sleeve 24 is rotated downward.
  • a further possibility of fixing the yoke 38 and the current band 36 to the anode holding device 17 provides, according to FIG. 6, a sleeve 26 with an internal thread in which a pressing bolt 29 with an external thread, which can preferably be moved via a motor or the like. 27 and a gear mechanism 28, is guided.
  • the sleeve 26 has a notch 25a into which the yoke 38 and the current band 36 are inserted. Both are clamped by turning the pressing bolt 29.
  • the anode width is preferably chosen so that it corresponds to twice the width of a coal block 30.
  • the furnace current thus flows from two individual conductors 33 and 34 to an anode 16.
  • two cathode bars 31 and 32 can also be joined together on a longitudinal side of the furnace 10 as shown in FIG. 3 and guided to the compensating conductor of the furnace 10a.
  • two coal blocks 30 each form with two individual conductors 33 and 34 and two anodes 16, one unit, which can be arranged in any number of different furnace sizes.
  • the working surface 41 is located between two electrolysis furnaces 10.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Inert Electrodes (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Glass Compositions (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Cable Accessories (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP80810401A 1979-12-21 1980-12-17 Vorrichtung zur Führung des Stromes zwischen Elektrolyseöfen Expired EP0031307B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11378/79 1979-12-21
CH1137879 1979-12-21

Publications (2)

Publication Number Publication Date
EP0031307A1 EP0031307A1 (de) 1981-07-01
EP0031307B1 true EP0031307B1 (de) 1983-05-11

Family

ID=4372939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810401A Expired EP0031307B1 (de) 1979-12-21 1980-12-17 Vorrichtung zur Führung des Stromes zwischen Elektrolyseöfen

Country Status (14)

Country Link
US (1) US4397728A (enrdf_load_stackoverflow)
EP (1) EP0031307B1 (enrdf_load_stackoverflow)
AT (1) ATE3310T1 (enrdf_load_stackoverflow)
AU (1) AU538727B2 (enrdf_load_stackoverflow)
BR (1) BR8008392A (enrdf_load_stackoverflow)
CA (1) CA1148115A (enrdf_load_stackoverflow)
DE (1) DE3009098C2 (enrdf_load_stackoverflow)
GR (1) GR72799B (enrdf_load_stackoverflow)
IS (1) IS1171B6 (enrdf_load_stackoverflow)
NO (1) NO153935C (enrdf_load_stackoverflow)
NZ (1) NZ195854A (enrdf_load_stackoverflow)
PL (1) PL228608A1 (enrdf_load_stackoverflow)
YU (1) YU320980A (enrdf_load_stackoverflow)
ZA (1) ZA807908B (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054399B2 (ja) * 1982-04-30 1985-11-29 住友アルミニウム製錬株式会社 アルミニウム製造用電解炉
US4976841A (en) * 1989-10-19 1990-12-11 Alcan International Limited Busbar arrangement for aluminum electrolytic cells
EP0787833B1 (de) * 1996-01-26 2001-10-17 Alusuisse Technology & Management AG Schienenanordnung für Elektrolysezellen
US6358393B1 (en) * 1997-05-23 2002-03-19 Moltech Invent S.A. Aluminum production cell and cathode
US7507319B2 (en) * 2006-07-21 2009-03-24 Ebara Corporation Anode holder
WO2008048844A1 (en) * 2006-10-18 2008-04-24 Alcoa Inc. Electrode containers and associated methods
FR3009564A1 (fr) * 2013-08-09 2015-02-13 Rio Tinto Alcan Int Ltd Aluminerie comprenant un circuit electrique de compensation
FR3016894B1 (fr) * 2014-01-27 2017-09-01 Rio Tinto Alcan Int Ltd Cuve d'electrolyse comportant un ensemble anodique contenu dans une enceinte de confinement
CA2952166C (fr) 2014-07-04 2022-07-26 Rio Tinto Alcan International Limited Ensemble anodique
FR3032459B1 (fr) 2015-02-09 2019-08-23 Rio Tinto Alcan International Limited Aluminerie et procede de compensation d'un champ magnetique cree par la circulation du courant d'electrolyse de cette aluminerie
FR3032460B1 (fr) * 2015-02-09 2017-01-27 Rio Tinto Alcan Int Ltd Cuve d'electrolyse
FR3100938B1 (fr) * 2019-09-17 2023-03-03 A M C Circuit d’alimentation pour cellule d’électrolyse comprenant un dispositif de court-circuitage et un sectionneur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216843B2 (enrdf_load_stackoverflow) * 1973-10-26 1977-05-12
FR2324761A1 (fr) * 1975-09-18 1977-04-15 Pechiney Aluminium Procede et dispositif pour l'alimentation en courant electrique des cuves d'electrolyse ignee placees en travers
PL115407B3 (en) * 1976-03-08 1981-04-30 Pechiney Aluminium Method and apparatus for compensation of magnetic fields of adjoining rows of thermo-electrolyzer tanks
NO139829C (no) * 1977-10-19 1979-05-16 Ardal Og Sunndal Verk Anordning for kompensering av skadelig magnetisk paavirkning mellom to eller flere rekker av tverrstilte elektrolyseovner for smelteelektrolytisk fremstilling av aluminium
SU863719A1 (ru) * 1978-02-06 1981-09-15 Всесоюзный Научно-Исследовательский И Проектный Институт Алюминиевой,Магниевой И Электродной Промышленности Ошиновка электролизеров дл получени алюмини

Also Published As

Publication number Publication date
BR8008392A (pt) 1981-07-07
US4397728A (en) 1983-08-09
NO803806L (no) 1981-06-22
PL228608A1 (enrdf_load_stackoverflow) 1981-09-18
NZ195854A (en) 1984-11-09
CA1148115A (en) 1983-06-14
EP0031307A1 (de) 1981-07-01
GR72799B (enrdf_load_stackoverflow) 1983-12-05
NO153935C (no) 1986-06-18
DE3009098A1 (de) 1981-07-02
AU6547780A (en) 1981-06-25
AU538727B2 (en) 1984-08-23
DE3009098C2 (de) 1983-02-24
NO153935B (no) 1986-03-10
ZA807908B (en) 1981-12-30
ATE3310T1 (de) 1983-05-15
YU320980A (en) 1982-08-31
IS2604A7 (is) 1981-06-22
IS1171B6 (is) 1984-12-28

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