EP0345959B1 - Anordnung der Stromschienen bei grossen quergestellten Elektrolysezellen - Google Patents

Anordnung der Stromschienen bei grossen quergestellten Elektrolysezellen Download PDF

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Publication number
EP0345959B1
EP0345959B1 EP89305150A EP89305150A EP0345959B1 EP 0345959 B1 EP0345959 B1 EP 0345959B1 EP 89305150 A EP89305150 A EP 89305150A EP 89305150 A EP89305150 A EP 89305150A EP 0345959 B1 EP0345959 B1 EP 0345959B1
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EP
European Patent Office
Prior art keywords
cell
busbars
cells
disposed
short ends
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 - Lifetime
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EP89305150A
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English (en)
French (fr)
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EP0345959A1 (de
Inventor
Hans Georg Tidemann Nebell
Fredrik Skatvedt
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Norsk Hydro ASA
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Norsk Hydro ASA
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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

  • This invention relates to an aluminium potline comprising rows of reduction cells with the cells arranged transversely in each row and more particularly to a potline having the current conducted through the bottom of the cells.
  • the cells in an aluminium potline are arranged in rows as mentioned above.
  • the distance between the rows, or rather the distance from the centre line of one row to another is from 30 to 50 meters.
  • the cells are arranged in two or more, equal number of rows in which extra busbars for the return current are avoided.
  • the current in two neighbouring rows flows in opposite directions.
  • a major problem with large aluminium potlines in which electric current of up to 300 kA is used is that the rows of reduction cells magnetically influence each other.
  • the molten metal forming the cathode at the bottom of each cell is influenced by electromagnetic forces due to the current being conducted through the metal.
  • More electric current is normally conducted around or under the short end of the cells facing the neighbouring row of cells than the other short ends.
  • This is a well known method which is already patented (see e.g. US-A-4194958). With the known solution it is thus possible to produce a vertical magnetic field which is symmetrical about the longitudinal axis as well as the transverse axis of each cell.
  • the absolute values of the magnetic field will easily rise above 30 Gauss, in some cases more than 100 Gauss.
  • a potline for the electrolytic production of aluminium in accordance with the invention comprises rows of reduction cells with the cells arranged transversely in each row, each cell having at least one conductor projecting through the bottom of the cell for each carbon cathode block within the cell, and in which about half of the electric current is conducted to one cathode collector busbar and the other half to another collector busbar and is characterised in that the cathode collector busbars are disposed underneath the cell adjacent its long sides, and that electric current from the collector busbar which is disposed at the largest distance from the next cell in the row, is conducted to said next cell via two busbars provided at the short ends of the cell and via one or more pairs of busbars provided underneath the cell, whereof the two busbars at the short ends of the cell have a cross section enabling them to conduct about twice as much current as each of the busbars being provided underneath the cells.
  • Each cell in the potline may be provided with two busbars underneath the cell which are preferably positioned close to the short ends of the cell.
  • busbars may be provided underneath the cell with two of these busbars (K2,K5) preferably disposed at the short ends of the cell, whereas the two other busbars (K3,K4) are each preferably disposed in the middle between the short ends and the transverse axis of the cell.
  • Fig. 1 shows a vertical section of a reduction cell with the electric current output through the bottom.
  • Fig. 2 shows schematically the busbar arrangement for these cells as seen from above.
  • the number of cathode carbon blocks disposed, in parallel, in each cell depends upon the width of the carbon blocks. In large electrolysis cells the number may be up to 26; in this example 23 are shown (see Fig. 2).
  • One of the collector busbars B1 is disposed directly below the long side of the cell, and projects outwards for about 0,5 meter from the short ends of the cell.
  • the other collector busbar B2 is disposed similarly on the other side of the cell.
  • collector busbars B1, B2 in this embodiment are arranged directly below the long sides of the cells, theoretical calculations have shown that the collector busbars may be disposed somewhat on the outside of the cathode cells, preferably 0,5 meter from the sides.
  • Part of the electric current collected in the collector busbar B1 is conducted to cell No. 2 via two busbars, K1 and K6, which are disposed at each end of the cells, at about the same height as or a bit lower than the molten metal in the cell, (see Fig. 2, Cell No. 2).
  • the rest of the current is conducted to the collector busbar B2 via 4 busbars, K2,K3, K4 and K5 underneath the cell and then to the next cell via raiser busbars S1,S2,S3,S4 and S5.
  • the current distribution in the six busbars K1-K6 conducting electric current from the collector busbar B1 is, according to the invention, primarily dependent upon the size of the cross sections of the busbars K1 to K6. If the rows of cells are positioned far enough apart from one another, for instance 50 meters or more, the cross sections of the busbars K1 and K6 ought to be twice the size of the cross section of the busbars K2,K3,K4 and K5. This will give an electric current in the busbars K1 and K6 which is twice the size of current in the busbars K2 to K5, and the current distribution will give a very favourable magnetic field.
  • a potline as described herein provides low maximum absolute values for the vertical magnetic field which is below 10 Gauss for the whole anode. Simultaneously, the cells are completely compensated for the magnetic influence of the dominating neighbouring row and the number of busbars required is reduced.

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Massaging Devices (AREA)
  • Press Drives And Press Lines (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (3)

  1. Reihe von Elektrolysezellen zur elektrolytischen Herstellung von Aluminium, die zwei Reihen von Reduktionszellen umfasst, wobei die Zellen in jeder Reihe quer angeordnet sind, jede Zelle aus einer Vielzahl von Kohlenstoffkathodenblöcken besteht und wenigstens einen Leiter hat, der durch den Boden der Zelle für jeden Kohlenstoffkathodenblock in der Zelle herausragt, und in der ungefähr die Hälfte des elektrischen Stromes zu einer Kathodenstromsammelschiene und die andere Hälfte zu einer anderen Stromsammelschiene geleitet wird, dadurch gekennzeichnet, dass die Kathodenstromsammelschienen (B1,B2) unter der Zelle neben jeder ihrer langen Seiten angeordnet sind, und dass elektrischer Strom von der Stromsammelschiene (B1), die mit der grössten Entfernung von der nächsten Zelle in der Reihe angeordnet ist, zu der nächsten Zelle mittels zweier Stromschienen (K1,K6), die an dem kurzen Ende der Zellen vorgesehen sind, geleitet wird, und mittels eines oder mehreren Paaren (K2,K3,K4,K5) von Stromschienen, die unter der Zelle vorgesehen sind, von denen die beiden Stromschienen (K1,K6) an den kurzen Enden der Zelle einen Querschnitt haben, der sie befähigt, ungefähr zweimal soviel Strom wie jede der Stromschienen, die unter den Zellen vorgesehen sind, zu leiten.
  2. Reihe von Elektrolysezellen nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Stromschienen (K2,K5) unter der Zelle vorgesehen sind, und dass die beiden Stromschienen in der Nähe der kurzen Enden der Zelle angeordnet sind.
  3. Reihe von Elektrolysezellen nach Anspruch 1, dadurch gekennzeichnet, dass vier Stromschienen unter der Zelle vorgesehen sind, und dass zwei dieser Stromschienen (K2,K5) an den kurzen Enden der Zelle angeordnet sind, während die anderen beiden Stromschienen (K3,K4) in der Mitte zwischen den kurzen Enden und der Querachse der Zelle angeordnet sind.
EP89305150A 1988-06-06 1989-05-22 Anordnung der Stromschienen bei grossen quergestellten Elektrolysezellen Expired - Lifetime EP0345959B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO882485A NO164721C (no) 1988-06-06 1988-06-06 Anordning av skinnesystem paa store tverrstilte elektrolyseovner.
NO882485 1988-06-06

Publications (2)

Publication Number Publication Date
EP0345959A1 EP0345959A1 (de) 1989-12-13
EP0345959B1 true EP0345959B1 (de) 1993-03-10

Family

ID=19890954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89305150A Expired - Lifetime EP0345959B1 (de) 1988-06-06 1989-05-22 Anordnung der Stromschienen bei grossen quergestellten Elektrolysezellen

Country Status (9)

Country Link
EP (1) EP0345959B1 (de)
CN (1) CN1020480C (de)
AU (1) AU619299B2 (de)
BR (1) BR8902633A (de)
DE (1) DE68905242T2 (de)
ES (1) ES2039859T3 (de)
NO (1) NO164721C (de)
NZ (1) NZ229292A (de)
RU (1) RU1813124C (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7074598A (en) * 1997-05-23 1998-12-11 Moltech Invent S.A. Aluminium production cell and cathode
US6087800A (en) * 1999-03-12 2000-07-11 Eaton Corporation Integrated soft starter for electric motor
CA2457363C (en) * 2001-08-09 2009-07-28 Alcoa Inc. Component cathode collector bar
CN100439566C (zh) * 2004-08-06 2008-12-03 贵阳铝镁设计研究院 大面不等电式五点进电母线配置装置
CN100451177C (zh) * 2004-08-06 2009-01-14 贵阳铝镁设计研究院 非对称式槽底母线配置及电流配置方法
NO332480B1 (no) * 2006-09-14 2012-09-24 Norsk Hydro As Elektrolysecelle samt fremgangsmate for drift av samme
NO331318B1 (no) * 2007-04-02 2011-11-21 Norsk Hydro As Fremgangsmate for drift av elektrolyseceller koblet i serie samt samleskinnesystem for samme
FI121472B (fi) * 2008-06-05 2010-11-30 Outotec Oyj Menetelmä elektrodien järjestämiseksi elektrolyysiprosessissa, elektrolyysijärjestelmä ja menetelmän käyttö ja/tai järjestelmän käyttö

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4194959A (en) * 1977-11-23 1980-03-25 Alcan Research And Development Limited Electrolytic reduction cells
CH648065A5 (de) * 1982-06-23 1985-02-28 Alusuisse Schienenanordnung fuer elektrolysezellen einer aluminiumhuette.
FR2552782B1 (fr) * 1983-10-04 1989-08-18 Pechiney Aluminium Cuve d'electrolyse a intensite superieure a 250 000 amperes pour la production d'aluminium par le procede hall-heroult

Also Published As

Publication number Publication date
RU1813124C (ru) 1993-04-30
DE68905242D1 (de) 1993-04-15
EP0345959A1 (de) 1989-12-13
CN1020480C (zh) 1993-05-05
AU619299B2 (en) 1992-01-23
AU3606689A (en) 1989-12-07
ES2039859T3 (es) 1993-10-01
NZ229292A (en) 1991-01-29
DE68905242T2 (de) 1993-08-12
CN1038846A (zh) 1990-01-17
NO882485D0 (no) 1988-06-06
NO164721B (no) 1990-07-30
NO882485L (no) 1989-12-07
NO164721C (no) 1990-11-07
BR8902633A (pt) 1990-01-23

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