EP0072778B1 - Disposition de barres d'amenée de courant pour électrolyseurs - Google Patents

Disposition de barres d'amenée de courant pour électrolyseurs Download PDF

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Publication number
EP0072778B1
EP0072778B1 EP82810337A EP82810337A EP0072778B1 EP 0072778 B1 EP0072778 B1 EP 0072778B1 EP 82810337 A EP82810337 A EP 82810337A EP 82810337 A EP82810337 A EP 82810337A EP 0072778 B1 EP0072778 B1 EP 0072778B1
Authority
EP
European Patent Office
Prior art keywords
cell
cathode
bar
bars
connection bars
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
EP82810337A
Other languages
German (de)
English (en)
Other versions
EP0072778A1 (fr
Inventor
Wolfgang Schmidt-Hatting
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 AT82810337T priority Critical patent/ATE22939T1/de
Publication of EP0072778A1 publication Critical patent/EP0072778A1/fr
Application granted granted Critical
Publication of EP0072778B1 publication Critical patent/EP0072778B1/fr
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 rail arrangement for conducting the direct electrical current from the cathode bar ends of a transverse electrolysis cell for producing aluminum via cathode rails, connecting rails and risers to the long side of the traverse of the follow-up cell facing the cell, whereby for practically complete compensation of the cell's own magnetic field the upstream cathode bar ends connected via cathode bars are arranged under the cell and lead to a connecting bar of the downstream cathode bar ends or to a riser.
  • the electrolyte becomes poor in aluminum oxide.
  • a lower concentration of 1 to 2% by weight of aluminum oxide in the electrolyte there is an anode effect, which results in an increase in the voltage from, for example, 4 to 5 V to 30 V and above.
  • the crust of solid electrolyte material must be hammered in and the aluminum concentration increased by adding new alumina.
  • An electrolysis hall has at least two rows of longitudinal or transverse cells through which electrical direct current flows.
  • at least one return line always generates vertical magnetic interference, which considerably disturbs the desired magnetic symmetry in an electrolysis cell.
  • These vertical components of magnetic induction are mainly responsible for the magnetic effects of metal flow and bulge, because they mainly become magnetic with the horizontal components of the current density in the metal
  • the electrolysis current which flows through the crossbeam, the anode rods, the anodes, the electrolyte, the liquid metal, the carbon bottom and the cathode bars, creates a magnetic field of the cell with strong vertical components in its four corners.
  • this self-field is generally supported by the connecting rails.
  • DE-OS 26 53 643 the aim is to compensate for vertical magnetic components by connecting the ends of the cathode bars on at least one long side of the transverse electrolysis cells in different numbers to rails leading to the crossbeam of the following cell. With regard to an additional magnetic field, this has the same influence as cutting through the cathode rails at a corresponding point.
  • transverse electrolysis cells for the production of aluminum by means of melt flow electrolysis are described, a part of the electrical direct current emerging from the upstream cathode bar ends being conducted through under the cell.
  • These cathode bar ends are arranged in the region of the transverse axis of the electrolytic cell.
  • the other upstream cathode bar ends are connected by rails which are guided around the cell.
  • the direct current from all upstream and downstream cathode bar ends is fed via four risers to the anode bar of the subsequent cell.
  • the inventor set himself the task of suppressing the vertical magnetic components of the cell's own field in the four corners by means of a further improved rail configuration, by creating an arrangement which, in addition to low costs for the rail material, also permits an optimally low overall ohmic resistance in the connecting rails and so lowers the cost of cell operation.
  • a connecting rail arranged in the area of the cell longitudinal axis is preferably arranged exactly symmetrically with respect to the plane of the cell longitudinal axis.
  • the additional rule is that they are preferably not only arranged symmetrically, but also as close as possible to the longitudinal axis of the cells.
  • the connecting rails leading up to the region of the longitudinal axis under the cell and beyond the end faces of the cell are considerably longer than the connecting rails running completely under the cell in the middle.
  • the ratio of the total electrical resistances from the cathode bar ends to the traverse of the following cell can be determined by appropriate design of the rail cross sections and can be selected so that the desired distribution of the current across the two types of connecting rails takes place. The same result could be produced if the two types of rails have the same cross-section, but are made of metals with different electrical resistance.
  • the cathode and / or connecting rails can be arranged asymmetrically in a known manner with respect to the transverse axis of the cell, for example as in DE-OS 28 41 205.
  • the invention is explained in more detail using the following exemplary embodiments.
  • the single figure shows schematically a section of a series of transverse electrolysis cells for the production of aluminum.
  • the direct electrical current flows from an electrolysis cell 10 in the general current direction to the subsequent cell 12. Twelve upstream cathode bar ends 16 emerge from a long side 14 of the electrolysis cell 10. These are symmetrical with respect to the transverse axis Q of the electrolysis cells with two separate ones the cell longitudinal side 14 arranged cathode rails 18 connected.
  • the ends of the cathode rails 18 which are adjacent to the cell transverse axis Q are connected via flexible bands to connecting rails 20 which pass horizontally completely beneath the cell.
  • connecting rails 22 which initially run horizontally under the cell in one section 22A through to the area of the cell longitudinal axis L, then in a second section 22B in the direction of the cell longitudinal axis L at approximately the same level
  • Lead cm to 1 m outside the end faces 24 of the electrolysis cell 10 run along the end faces in a third section 22C and finally open into a common connecting rail 28 via a last section 22D along the longitudinal side 26 of the electrolysis cell 10.
  • the twelve downstream cathode bar ends 30 are also connected to two cathode rails 32 which are symmetrical with respect to the cell transverse axis Q.
  • a connecting piece 34 connected approximately in the middle of the cathode rails leads to a common connecting rail 28 which leads via a riser 36 to the cross member 38 of the following cell.
  • the ends of the cathode rails 32 facing the cell transverse axis Q are connected via a connecting rail 42 to a riser 40 which also leads to the cross member 38.
  • Both the risers 36, 40 themselves and the rails 44 leading to the crossmember 38 can be designed as individually insulated or connecting rails that combine in pairs or groups of current conducting bars.

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  • 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)

Claims (5)

1° Disposition de rails pour amener le courant continu électrique depuis les extrémités des barres de cathodes (16, 30) d'une cellule d'électrolyse (10), disposée transversalement, pour la fabrication de l'aluminium, jusqu'au côté longitudinal, tourné vers la cellule, de la traverse (38) de la cellule suivante (12), en passant par des rails de cathodes (18, 32), des rails de liaison et des conducteurs montants, disposition dans laquelle, pour obtenir une compensation pratiquement parfaite du champ mangétique propre de la cellule (10), les rails de liaison reliés aux extrémités des barres de cathodes (16) situées en amont, par l'intermédiaire des rails de cathodes (18), sont disposés sous la cellule et conduisent à des rails de liaison des extrémités des barres de cathodes (30) situées en aval ou à des conducteurs montants,
caractérisée
en ce que par rapport à l'axe transversal (Q) de la cellule, dans chaque moitié de cellule, sont disposés au moins chaque fois deux rails de liaison (20,22) reliés, individuellement ou en groupe, par l'intermédiaire des rails de cathodes (18), aux extrémités des barres de cathodes (16) situées en amont, étant précisé que
- premièrement, des rails de liaison (20) passent, au voisinage de l'axe transversal (Q) de la cellule, entièrement sous la cellule (6) et conduisent à un conducteur montant (40), et que
- deuxièmement, des rails de liaison (22) passent sous la cellule (10) entre l'axe transversal (Q) de la cellule et les côtés frontaux (24), jusqu'au voisinage de l'axe longitudinal (L) de la cellule; puis passent, à peu près au même niveau, selon la direction longitudinale de la cellule, jusqu'à un peu au-delà des côtés frontaux (24); puis passent à faible distance le long de ces côtés frontaux (24), en direction de la cellule suivante (12); puis passent le long du côté longitudinal (26) de la cellule et conduisent enfin, par l'intermédiaire d'un rail de liaison (28), jusqu'à un conducteur montant (36).
2° Disposition de rails selon la revendication 1, caractérisée en ce que le (les) rail(s) de liaison (22B) conduisant le courant selon la direction longitudinale de la cellule, au-delà du côté frontal (24) est(sont) disposé(s) symétriquement par rapport à l'axe longitudinal (L) de la cellule.
3° Disposition de rails selon la revendication 1, caractérisée en ce que, s'il existe plusieurs rails de liaison (22), les éléments partiels (22B) conduisant le courant, selon la direction longitudinale de la cellule, au-delà du côté frontal (22), sont disposés, par rapport à l'axe longitudinal (L) de la cellule, symétriquement et le plus possible près de lui.
4° Disposition de rails selon au moins l'une des revendications 1 -3, caractérisée en ce qu'au moins deux des rails de cathodes (18, 32) ou de liaison (20, 22) disposés par paire ont une disposition asymétrique par rapport à l'axe transversal (Q) de la cellule.
5° Disposition de rails selon au moins l'une des revendications 1-4, caractérisée en ce que la longueur des extrémités des barres de cathodes (16, 30) est asymétrique par rapport à l'axe transversal (Q) de la cellule.
EP82810337A 1981-08-18 1982-08-11 Disposition de barres d'amenée de courant pour électrolyseurs Expired EP0072778B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82810337T ATE22939T1 (de) 1981-08-18 1982-08-11 Schienenanordnung fuer elektrolysezellen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH5320/81A CH656152A5 (de) 1981-08-18 1981-08-18 Schienenanordnung fuer elektrolysezellen.
CH5320/81 1981-08-18
DE3133049A DE3133049C1 (de) 1981-08-18 1981-08-21 Schienenanordnung für Elektrolysezellen

Publications (2)

Publication Number Publication Date
EP0072778A1 EP0072778A1 (fr) 1983-02-23
EP0072778B1 true EP0072778B1 (fr) 1986-10-15

Family

ID=25697449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810337A Expired EP0072778B1 (fr) 1981-08-18 1982-08-11 Disposition de barres d'amenée de courant pour électrolyseurs

Country Status (7)

Country Link
US (1) US4396483A (fr)
EP (1) EP0072778B1 (fr)
AU (1) AU8694882A (fr)
CA (1) CA1178241A (fr)
CH (1) CH656152A5 (fr)
DE (1) DE3133049C1 (fr)
ZA (1) ZA825805B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58144490A (ja) * 1982-02-19 1983-08-27 Sumitomo Alum Smelt Co Ltd アルミニウム製造用電解炉
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
DE3482272D1 (de) * 1984-12-28 1990-06-21 Alcan Int Ltd Schienenanordnung fuer elektrolysezellen zur herstellung von aluminium.
FR2583068B1 (fr) * 1985-06-05 1987-09-11 Pechiney Aluminium Circuit de connexion electrique de series de cuves d'electrolyse pour la production d'aluminium sous tres haute intensite
NO166657C (no) * 1988-11-28 1991-08-21 Norsk Hydro As Skinnearrangement for store tverrstilte elektrolyseovner.
FR2868436B1 (fr) * 2004-04-02 2006-05-26 Aluminium Pechiney Soc Par Act Serie de cellules d'electrolyse pour la production d'aluminium comportant des moyens pour equilibrer les champs magnetiques en extremite de file
FI121472B (fi) * 2008-06-05 2010-11-30 Outotec Oyj Menetelmä elektrodien järjestämiseksi elektrolyysiprosessissa, elektrolyysijärjestelmä ja menetelmän käyttö ja/tai järjestelmän käyttö
CN101857960A (zh) * 2010-04-28 2010-10-13 贵阳铝镁设计研究院 一种铝电解槽母线配置方法
US10128486B2 (en) 2015-03-13 2018-11-13 Purdue Research Foundation Current interrupt devices, methods thereof, and battery assemblies manufactured therewith

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415724A (en) * 1965-12-16 1968-12-10 Aluminum Co Of America Production of aluminum
JPS5216843B2 (fr) * 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
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
JPS5853717B2 (ja) * 1979-04-02 1983-11-30 三菱軽金属工業株式会社 アルミニウム電解槽アルミニウムメタル層の安定化法
JPS56290A (en) * 1979-06-11 1981-01-06 Sumitomo Alum Smelt Co Ltd Electrolytic furnace for production of aluminum
CH648605A5 (de) * 1980-06-23 1985-03-29 Alusuisse Schienenanordnung einer elektrolysezelle.

Also Published As

Publication number Publication date
AU8694882A (en) 1983-02-24
CH656152A5 (de) 1986-06-13
US4396483A (en) 1983-08-02
DE3133049C1 (de) 1983-04-07
EP0072778A1 (fr) 1983-02-23
ZA825805B (en) 1983-06-29
CA1178241A (fr) 1984-11-20

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