EP0033714B1 - Schienenanordnung für Elektrolysezellen - Google Patents

Schienenanordnung für Elektrolysezellen Download PDF

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Publication number
EP0033714B1
EP0033714B1 EP81810016A EP81810016A EP0033714B1 EP 0033714 B1 EP0033714 B1 EP 0033714B1 EP 81810016 A EP81810016 A EP 81810016A EP 81810016 A EP81810016 A EP 81810016A EP 0033714 B1 EP0033714 B1 EP 0033714B1
Authority
EP
European Patent Office
Prior art keywords
busbars
cell
arrangement according
busbar arrangement
cells
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
EP81810016A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033714A2 (de
EP0033714A3 (en
Inventor
Jean-Marc Blanc
Hans Pfister
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
Priority to AT81810016T priority Critical patent/ATE4917T1/de
Publication of EP0033714A2 publication Critical patent/EP0033714A2/de
Publication of EP0033714A3 publication Critical patent/EP0033714A3/de
Application granted granted Critical
Publication of EP0033714B1 publication Critical patent/EP0033714B1/de
Expired legal-status Critical Current

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Classifications

    • 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 present invention relates to a rail arrangement for guiding the direct electrical current from the cathode bar ends of a longitudinal electrolysis cell, in particular for the production of aluminum, to the anodes of the subsequent cell.
  • the electrolysis cell In normal operation, the electrolysis cell is usually operated periodically, even if there is no anode effect by breaking in the crust and adding alumina.
  • the cathode bars are embedded in the carbon base of the electrolysis cell, the ends of which penetrate the electrolysis tank on both long sides. These iron bars collect the electrolysis current, which flows via the busbars arranged outside the cell, the risers, the anode bars or trusses and the anode rods to the carbon anodes of the subsequent cell.
  • the ohmic resistance from the cathode bars to the anodes of the subsequent cells causes energy losses which are in the order of up to 1 kWh / kg of aluminum produced. Attempts have therefore repeatedly been made to optimize the arrangement of the busbars with respect to the ohmic resistance.
  • the vertical components of magnetic induction formed must also be taken into account, which - together with the horizontal current density components - generate a force field in the liquid metal obtained through the reduction process.
  • the current is conducted from cell to cell as follows:
  • the direct electrical current emerges from cathode bars arranged in the carbon bottom of the cell.
  • the ends of the cathode bars are connected to the busbars via flexible bands, which run parallel to the row of electrolytic cells. From these busbars running along the long sides of the cells, the current is led, via other flexible belts and via risers, to the two ends of the traverse of the subsequent cell.
  • the current distribution between the nearer and the far end of the traverse based on the general current direction of the cell row, varies from 100-0% to 50-50%.
  • the vertical anode rods which carry the carbon anodes and feed with electrical current, are attached to the crossbar by means of locks.
  • the electrical direct current must travel a relatively long way from a cathode bar end of a cell to an anode of the subsequent cell.
  • part of the electrical current has to be conducted via the busbars to the downstream end of the crossbar, then it flows backwards over the crossbar.
  • the electrical current is raised from the level of the cathode bar to the height of the traverse and then flows down to the anodes. This returning and returning the current in two directions means an additional consumption of metal during the manufacture of the furnace series and an additional consumption of energy due to the Joule effect.
  • the inventor has therefore set itself the task of creating a rail arrangement for guiding the direct current from the cathode bar ends of a longitudinal electrolysis cell to the anodes of the subsequent cell, in which less metallic rail material has to be used, smaller losses of electrical energy occur and also the harmful magnetic energy Effects are reduced.
  • the flexible current strips arranged close to one another which conduct the current from the cathode bar ends to the busbars leading to the subsequent cell or the current from the busbars which are connected to the cathode bar ends of the preceding electrolysis cell, lead to the anodes, have the effect that the third type of the flow components mentioned above, which rotates in the four quadrants, is eliminated.
  • This so-called symmetrical solution in which the busbars are equidistant from the two long sides of the cells, may prevent the magnetic influence partially but not completely.
  • the aim is therefore to limit or eliminate the magnetic influence of the neighboring cells Q ihe.
  • This is achieved by an asymmetrical arrangement of the busbars, in that the distance of the busbars from the long sides of the electrolysis cell is shorter on the side facing the row of neighboring cells and longer on the other side.
  • the resulting asymmetry has the effect that the magnetic influence of the neighboring cell row is eliminated and the first flow component discussed above along the inner circumference of the cell is also prevented.
  • the flexible current bands which connect the cathode bar ends to the busbars are more or less curved.
  • these flexible current strips are strongly bent, but when the busbars are at a large distance from the long sides of the cell, they are almost stretched. This does not change the electrical resistance, but only the influence of the magnetic field.
  • the busbars facing away from and facing the neighboring cell row are preferably arranged in such a way that the difference in their distance from the corresponding long sides of the cells makes up approximately 50-80 cm.
  • the cross section of the first and second busbars is designed such that the electrical resistance of all busbars is approximately the same.
  • the short busbars can have a smaller cross section than the longer ones.
  • the busbars can also be made of metals of different electrical resistance, the shortest busbars having the greatest, the longest busbars the smallest specific electrical resistance.
  • the asymmetry can also be generated by connecting a different number of cathode bar ends to first busbars opposite one another with respect to the cell longitudinal axis.
  • the electrolysis cells 10 and 12 shown in FIG. 1 are picked out from a row of cells in an aluminum smelter.
  • the general direction of the direct electrical current is designated I.
  • the adjacent row of electrolytic cells, which exerts a magnetic influence on the electrolytic cells 10 and 12, is located on the left in relation to the general current direction I.
  • the cathode bars arranged in the carbon bottom of cells 10 and 12 are only hinted at.
  • Flexible current strips 14, 16 are arranged at both ends of the cathode bars, which, as shown in Fig., At a short distance between the busbars 18, 20, 22 and 24 strongly bent, on the other hand, the busbars opposite with respect to the longitudinal axis of the cell are almost stretched with a large distance.
  • the busbars 18, 20, 22 and 24 are briefly closed at 26.
  • Three busbars 28, 30 and 32 arranged along the sequence cell 12 are conductively connected to the equipotential connection 26.
  • Flexible current bands 34 branch off from each of these current rails, one band each being connected to an anode carrier (not shown).
  • the busbar 28 leads the current to the nearest anodes 36, the busbar 30 to the middle anodes 36 and the busbar 32 to the anodes 36 of the follower cell 12 which are furthest away in the direction of current I.
  • all the busbars have the same electrical resistance, the bars 24 and 28 therefore have the smallest cross-section, if all the rails are made of the same material, and the rails 18 and 32 have the largest.
  • electrolysis cell 10 is also equipped with anodes 36 and the corresponding power supply lines, these have been omitted because of a better overview.
  • an electrolysis cell has 32 cathode bar ends, but has only 30 anodes. If a regular current distribution is to be ensured, an equipotential connection 26 must be present if the number of cathode bar ends and anodes is not the same.
  • Fig. 2 38 means the steel tub, 40 the thermal insulation, 42 the carbon bottom and 44 the cathode bar ends; a the large distance between the busbars 18, b the small one.

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)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Optical Measuring Cells (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
EP81810016A 1980-02-01 1981-01-23 Schienenanordnung für Elektrolysezellen Expired EP0033714B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81810016T ATE4917T1 (de) 1980-02-01 1981-01-23 Schienenanordnung fuer elektrolysezellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH812/80 1980-02-01
CH81280 1980-02-01

Publications (3)

Publication Number Publication Date
EP0033714A2 EP0033714A2 (de) 1981-08-12
EP0033714A3 EP0033714A3 (en) 1981-08-26
EP0033714B1 true EP0033714B1 (de) 1983-10-05

Family

ID=4195757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81810016A Expired EP0033714B1 (de) 1980-02-01 1981-01-23 Schienenanordnung für Elektrolysezellen

Country Status (12)

Country Link
US (1) US4359377A (is)
EP (1) EP0033714B1 (is)
AR (1) AR225488A1 (is)
AT (1) ATE4917T1 (is)
AU (1) AU6660581A (is)
BR (1) BR8100590A (is)
CA (1) CA1156971A (is)
DE (2) DE3009158A1 (is)
IS (1) IS1144B6 (is)
NO (1) NO154925C (is)
YU (1) YU25681A (is)
ZA (1) ZA81288B (is)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576920B1 (fr) * 1985-02-07 1987-05-15 Pechiney Aluminium Cuve d'electrolyse hall-heroult a barres cathodiques et a calorifugeage dissymetriques
US5981719A (en) * 1993-03-09 1999-11-09 Epic Therapeutics, Inc. Macromolecular microparticles and methods of production and use
US6090925A (en) * 1993-03-09 2000-07-18 Epic Therapeutics, Inc. Macromolecular microparticles and methods of production and use
US10128486B2 (en) 2015-03-13 2018-11-13 Purdue Research Foundation Current interrupt devices, methods thereof, and battery assemblies manufactured therewith
WO2018019888A1 (en) 2016-07-26 2018-02-01 Sgl Cfl Ce Gmbh Cathode current collector/connector for a hall-heroult cell
CN109845039B (zh) * 2016-07-29 2021-05-25 哈奇有限公司 用于电解池的柔性电气连接器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1185548A (fr) * 1957-10-29 1959-07-31 Elektrokemisk As Dispositif pour l'amenée de courant aux fours pour la production d'aluminium par fusion électrolytique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA887250A (en) * 1971-11-30 Vsesojuzny Nauchno-Issledovatelsky I Proektny Institut Aljuminievoi, Mag Nievoi I Elektrodnoi Promyshlennosti Bus bar system for aluminum reduction cells
US3650941A (en) * 1968-09-23 1972-03-21 Kaiser Aluminium Chem Corp Electrolytic reduction cell
CH544812A (de) * 1970-09-01 1973-11-30 Alusuisse Zelle für die Gewinnung von Aluminium durch Elektrolyse von Aluminiumoxid im Schmelzfluss
US3821101A (en) * 1972-09-08 1974-06-28 V Nikiforov Wiring system of electrolyzers for producing aluminum
FR2378107A1 (fr) * 1977-01-19 1978-08-18 Pechiney Aluminium Procede pour ameliorer l'alimentation en courant de cuves d'electrolyse alignees en long
FR2423554A1 (fr) * 1978-02-08 1979-11-16 Pechiney Aluminium Procede de reduction des perturbations magnetiques dans les series de cuves d'electrolyse a haute intensite
CH649317A5 (de) * 1978-08-04 1985-05-15 Alusuisse Elektrolysezelle mit kompensierten magnetfeldkomponenten.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1185548A (fr) * 1957-10-29 1959-07-31 Elektrokemisk As Dispositif pour l'amenée de courant aux fours pour la production d'aluminium par fusion électrolytique

Also Published As

Publication number Publication date
YU25681A (en) 1983-06-30
EP0033714A2 (de) 1981-08-12
NO810327L (no) 1981-08-03
ZA81288B (en) 1982-02-24
IS1144B6 (is) 1984-03-05
AU6660581A (en) 1981-09-10
IS2610A7 (is) 1981-07-02
DE3009158A1 (de) 1981-08-06
US4359377A (en) 1982-11-16
BR8100590A (pt) 1981-08-18
ATE4917T1 (de) 1983-10-15
NO154925C (no) 1987-01-14
CA1156971A (en) 1983-11-15
DE3161057D1 (en) 1983-11-10
EP0033714A3 (en) 1981-08-26
NO154925B (no) 1986-10-06
AR225488A1 (es) 1982-03-31

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