US3063919A - Method of operating high amperage electrolytic cells - Google Patents

Method of operating high amperage electrolytic cells Download PDF

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US3063919A
US3063919A US418974A US41897454A US3063919A US 3063919 A US3063919 A US 3063919A US 418974 A US418974 A US 418974A US 41897454 A US41897454 A US 41897454A US 3063919 A US3063919 A US 3063919A
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cell
current
cells
pot
cathode
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Marc F G Jouguet
Roger J Perret-Bit
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Pechiney SA
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Pechiney SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/22—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with arrangements compensating for thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • F16C27/066—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/20—Thermal properties
    • F16C2202/22—Coefficient of expansion

Definitions

  • the present invention which is based upon applicants investigations, relates to methods and apparatus which make it possible to reduce or to suppress unevenness and movements of the upper metal surface in the bottom of the pot (crucible) of electrolytic cells.
  • the conductors through which the total current passes comprise, in addition to the cell itself, the following:
  • This feeder system horizontally disposed above the anode assembly of the succeeding cell.
  • This feeder system is composed of several copper or aluminum bars of large cross-section, since each bar carries a considerable portion of the total current.
  • This feeder system extends over the entire length of the electrolytic cell, since it serves to distribute the current either to prebaked multiple anodes, or to steel bars called studs which feed the current to continuous anodes of the Sderberg type.
  • the present invention relates, therefore, to a method which makes it possible to reduce or, even suppress, variations in level at and movements of the upper surface of the liquid metal found in the bottom of the pot of igneous electrolytic cells intended for aluminum production, by bringing about as uniform and as vertical a distribution of current as possible over the entire surface of the cell, while suppressing, reducing or rendering more constant the vertical components of the magnetic fields produced in the pot of the electrolytic cell and, particularly, at the surface of separation of bath and liquid metal.
  • the invention likewise seeks to reduce the strength of the horizontal components of the magnetic field. To this end, it is necessary to carry out a double action on the currents and on the fields.
  • the currents in the metal will be vertical and uniform if the interpolar distance (gap) is constant over the whole surface of the cell, if the cathode surface has dimensions very nearly equal (close) to those of the anode surfacewhich latter may likewise be obtained, for example, by providing a solidified inclined mass (talus) of fluorides on the sides of the pot-and, finallly, if the carbon cathodes have an equipotential surface which is as nearly as possible in a horizontal plane. This last condition can only be realized if the connections to the external circuit be made from the upper plane of the cathode by means of conductors of equal resistance.
  • the steel bars extending from the cathode should be disposed vertically (French Patent 953,374) and should be increased in number, each of these bars being connected to the current feeder system of the succeeding cell by conductors of equal resistance; but, whatever arrangement be adopted for the cathode outlet bars, the connections between cells should, as far as possible, be so disposed that the currents iowing from each cathode outlet bar to the feeder system of the next cell follow as nearly as possible equal resistance paths.
  • This result can be obtained by connecting the cathode bars furthest away with the nearest end of the feeder system supplying the anode of the succeeding cell, and vice versa. Inasmuch as these longitudinal connections between cells will necessarily have different lengths, it is possible to control the cross-section of each in such a way as to obtain substantially equal resistances in each partial circuit.
  • the feeder system which distributes the current in the anode assemblygithe steel cathode bars when the latter are horizontal; the horizontal conductors which supply current to the ends of the feeder system; those conducto-rs which collect the current leaving the cathode barsY and pass it on to the succeeding cell, these latter conductors are generally Adisposed in groups on each side of and in immediate proximity to the cell as illustrated in FIGURE 18 of the annexed drawings to be described below; and, finally, the current passing through the line of cells which forms the return path for the series'.
  • the electrolysis cells ⁇ are arranged in at least two parallel rows, since it is necessary that the current be returned to the generators.
  • 'FIGURE l illustrates a cell provided with a Sderberg anode and vertical cathode outlet bars.
  • FIGURE 2 shows details of certain connections used in the embodiment of FIGURE l.
  • FIGURE 3 illustrates a lcell likewise provided with a Sderberg electrode, but l'having a horizontal cathode outlet bar; Y
  • FIGURE 4 illustrates a cell provided with prebaked a'nodes and horizontal outlet bars.
  • FIGURES 5 land 6 illustrate a further embodiment of the invention, comprising the use of a plurality of uniformly distributed overhead feeder bars, FIGURE 5 representing a diagrammatic cross-section along the line 5--5 of FIGURE'.
  • FIGURES 7, 8, and 9 illustrate embodiments of the invention in which the return current from each line of cells is disposed beneath the cells.
  • FIGURE 1G represents a still lfurther embodiment of the invention which eliminates the use of a feeder system.
  • FIGURE ll illustrates in top plan view the arrangement shown in FIGURE l0.
  • FIGURE l2 illustrates diagrammatically atransverse section of a further embodiment of the invention.
  • FIGURE 13 represents a still different form of the invention, showing a vertical sectionl through a cell.
  • FIGURE 13A shows a vertical' section through a cell according to another variant of the invention.
  • FIGURE 14 illustrates diagrammatically a cell and its conductors in transverse elevation, i.e., a' section taken along the line 1;1 of FIGURE l5.
  • FIGURE l5 shows the cell in elevation and along av section taken along the greatest length.
  • FIGURES 16 and 17 illustrate an arrangement similar to -that shown in FIGURES 14 and l5 but embodying an additional feature of the present invention.
  • FIGURES 18 Aand V19 relate to a still further improved embodiment of the present invention.
  • transverse section yacrossl the width thereof, two adjacent cells, each cell forming part of ⁇ a roW of cells, ⁇ all cells being connected in series.
  • FIGURE 20 illustrates afurther embodiment of the invention along the lines of that illustrated in FIGURE 19.
  • 1 2 represents the separating surface between bath and liquidV metal; 3 the electrolysis cell; 4 ⁇ an anode of the Sderberg type; 5 the current feeder system; 6 the studs for introducing current into the Sder-v berg anode; 8A and 8B the horizontal conductors which, in the prior art, Vwere usually arranged at the sides of the cell; prebaked anodes; 12 the steel cathode bars through which the current leaves the electrolysis cell.
  • the invention as previouslyY set out, relates' to means for reducing or suppressing the vertical components'o'f the magnetic fields. While certain of these means are broadly known, they must, in theinstant case, be' adapted for their novel function or be combined with novel means.
  • the feeder system can be supplied from both its ends, obtaining thereby an approximately Sil-50% current distribution (cf. FIGURE 6); however this proportion can -be varied so as to take into consideration the field composition (strength) of all the other bars.
  • this proportion can -be varied so as to take into consideration the field composition (strength) of all the other bars.
  • experience has shown that good results are obtained by providing for a current distribution at the ends of 4G-60% and 60-40%, respectively.
  • the feeder system can be disposed at such a distance above the cell that the effect of the resultant vertical tield at the line of separation between metal and bath is negligible.
  • this necessitates considerable lengthening of the vertical conductors bringing current to the prebaked anodes.
  • continuous anodes l4 of the Sderberg type are generally provided with current inlet studs 6 and with a steel casing (not shown) which furnish a preferental path for the magnetic field yand cause the formation of a field having ⁇ a vertical component even when the distance between the feeder systemV and the line 1--2 is great.
  • non-ferrous, nonmagnetic metals should be used for the casing and studs.
  • the vertical components of the magnetic fields can be reduced orY suppressed by disposing the indispensable horizontal conductors in sheet-like formations composed of as large a number as possible of parallel conductors, each carrying a fraction of the total current passing through the cell which is materially less than one half of the total current passing through the cell, as will be described in the following examples;
  • Example I The organization of the cell is completely modified, as illustrated in FIGURES l, 2, 3, and 4.
  • the usual feeder system is completely eliminated and the studs 6 (FIGURES l and 3), orV the prebaked anodes 10, are suppliedV with current by means of a certain number of vertical risers 11.
  • the correcting effect becomes the moreY marked as the number of risers is increased.
  • FIGURE 1 there is shown a cell provided with a Sderberg anode 4, vertical studsr and vertical cathode outlets 12. In the lower part of the cell are placed in the.
  • These vertical risers are constructed of flexible straps" ⁇ so as to permit free movement of the anode assembly and the' manner of their grouping is controlled by the4 necessity of leaving between them sufficient space for ready access of Workmen.
  • conductorsrA which provide for the transfer of the cur-- rent leaving the cathode bars, makes it possible to obtain in the cell as a whole regular magnetic fields which are as.
  • Example 2 The vertical component of the field due to the bars connecting the cathode of one cell to the anode of the following cell can be suppressed by using the arrangement shown in FIGURE 10. lt is to be noted that, in this scheme, the cells are placed in such Va manner that their largest dimension is perpendicular to the general direction of current flow Whereas, normally, this major dimension is parallel to the direction of current iiow.
  • the bars 12 connecting the vertical cathode outlet bars to the anode assembly of the succeeding cell are connected in bundles but remain in sheet form; they pass through the door 14 and terminate at the anodes of the succeeding cell.
  • the arrangement just' described which likewise eliminates the feeder system, is applicable to cells having either horizontal or vertical cathode outlets, land using either continuous Sderberg electrodes or prebaked electrodes.
  • FIGURE 11 gives a schematic top view of the arrangement just described.
  • the latter eliminates completely the vertical fields in the cells.
  • the horizontal elds produced by the aforementioned bars have the least possible strength and the greatest possible uniformity, since they are spread out in a great sheet.
  • Example 3 The vertical component of the magnetic field due to the line of adjacent cells which insure the return of the current to the generators can be suppressed in the following ways:
  • the present invention to reduce, or suppress altogether' such movements of the metal by diminishing or suppressing the transverse horizontal component of the magnetic field in the pot of the electrolytic cell at the separating surface between metd and bath.
  • the electrolysis cells used in the production of aluminum are generally of rectangular shape and, in the present specification, the horizontal transverse component is that component which is perpendicular to the general direction of the electric current passing from one cell to the succeeding one.
  • Example 4 Further improvements comprehended by the present invention will be described with reference to FIGURES 14-17 of the annexed drawings. Referring briellly to FIGURES 14 and 15 it will be observed that, in accordance with the earlier disclosure in the instant specification, the various electrical conductors supplying the cells have been disposed in such a fashion as to reduce as much as possible the vertical component of the magnetic field over the entire surface separating the rnetal and the bath.
  • the -steel bars by which the current leaves the cell being vertically arranged, the feeder system disposed above the cell for distributing the current to the anode assembly is simultaneously supplied at its both ends, and the horizontal conductors-which are indispensable for conveying the current from the end of one cell to the other end and for collecting the current leaving the cathode-are disposed in sheets of parallel conductors placed below the cell and parallel to its greatest length.
  • FIGURES 14 and 15, 1-2 represents, as before, the surface of separation between the liquid metal and the electrolytic bath.
  • 3 is the pot' of the cell; 4 the anode which, in the instant case, is a continuous anode of the Sderberg type; 5 is the feeder system which distributes the current to the studs 6 of the anode; 12 are the steel bars by which the current leaves the cathode and are electrically connected to the longitudinal conductors 8A placed underneath the cell.
  • the longitudinal conductors 8B supply current to both ends of the feeder system 5 through the intermediary of the vertical conductors or risers 11.
  • the left end of conductor 8B is joined to the current outlet of the preceding cell.
  • the conductors 8B and 8A overlap in elevation; 8B serves -to lead a portion of the current to the opposite end of the connecting bar 5, while SA collects the current leaving the bottom of the cell through the bars 12 in order to pass it on to the succeeding cell.
  • Example 5 In a row of electrolytic cells for the production of aluminum, the conductors are arranged as shown in FIGURE 18. Horizontal bars 12 provide for current outlet, the conductors 8A collecting the current leaving the cathode are disposed along the long sides of the cathode of the cell, in immediate proximity of the walls, but -below the bottom of the pot containing the metal. Conductors 3B which enable supply of current to the feeder system 5 at its two ends, are placed in the same manner above conductors 8A.
  • the conductors 8A, 8B of one line and SA, SB of the other line can be placed side by side in such a fashion that the Vertical components of the magnetic iields neutralize each other, as had already previously been proposed in the present specification (Example 3, FIGURE 12).
  • Those conductors whichare disposed at the outer sides of the lines of cells can be placed suiiiciently -far away to reduce the magnitude of the vertical component of the magnetic iield and even on the outside of the building which then constitutes a magnetic screen.
  • 4this modication has produced an improvement in the consumption of the electric energy per ton or aluminum produced.
  • Example 6 The fields can also be reduced by using magnetic screens.
  • the magnetic elds and, especially, their vertical components, can be weakened by the use of magnetic screens having a cross-section suflicient to avoid any appreciable eiect due to saturation.
  • the screens can be disposed as follows at the places indicated in FIGURE 13;
  • the screens b are, of course, made removeable to facilitate access to workers.
  • the vertical fields can also be reduced (weakened) by means of rather weak demagnetizing windings disposed a-t the following places shown on FIGURE 13A:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
US418974A 1954-02-09 1954-03-26 Method of operating high amperage electrolytic cells Expired - Lifetime US3063919A (en)

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CH (1) CH343649A (no)
DE (1) DE1083554B (no)
FR (1) FR1079131A (no)
GB (1) GB794421A (no)
NL (2) NL186581B (no)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385778A (en) * 1964-10-21 1968-05-28 Aluminum Co Of America Current collecting method and apparatus for aluminum reduction cells
US3617454A (en) * 1969-11-12 1971-11-02 Arthur F Johnson Bus structure from aluminum reduction cells
US3640800A (en) * 1970-07-14 1972-02-08 Arthur F Johnson Electrolytic cell
US3969213A (en) * 1973-10-26 1976-07-13 Nippon Light Metal Company Limited Aluminum electrolytic cells
JPS5242727B1 (no) * 1970-09-01 1977-10-26
JPS5242728B1 (no) * 1970-09-01 1977-10-26
US4176037A (en) * 1977-07-14 1979-11-27 Ardal Og Sunndal Verk A.S. Conductor arrangement for compensating for horizontal magnetic fields in pots containing a molten electrolytic bath
US4425200A (en) 1980-10-08 1984-01-10 Mitsubishi Keikinzoku Kogyo Kabushiki Kaisha Method and apparatus for stabilizing aluminum metal layers in aluminum electrolytic cells
CN104294318A (zh) * 2013-07-15 2015-01-21 贵阳铝镁设计研究院有限公司 降低铝电解槽焊接部位磁场强度的装置及其操作方法
FR3009564A1 (fr) * 2013-08-09 2015-02-13 Rio Tinto Alcan Int Ltd Aluminerie comprenant un circuit electrique de compensation
FR3032460A1 (fr) * 2015-02-09 2016-08-12 Rio Tinto Alcan Int Ltd Cuve d'electrolyse
US10358733B2 (en) 2015-02-09 2019-07-23 Rio Tinto Alcan International Limited Aluminum smelter and method to compensate for a magnetic field created by the circulation of the electrolysis current of said aluminum smelter

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU29922A1 (no) * 1971-03-18
FR2333060A1 (fr) * 1975-11-28 1977-06-24 Pechiney Aluminium Procede et dispositif pour la compensation des champs magnetiques des files voisines de cuves d'electrolyse ignee placees en travers
DE2809146A1 (de) * 1978-02-07 1979-08-09 Alusuisse Magnetische feldlinienabsorption bei elektrolysezellen
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

Citations (12)

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Publication number Priority date Publication date Assignee Title
US455631A (en) * 1891-07-07 maigrot
US2261684A (en) * 1939-02-23 1941-11-04 Youngstown Sheet And Tube Co Method and apparatus for welding
US2287502A (en) * 1941-06-12 1942-06-23 Bulldog Electric Prod Co Electrical distribution system
GB578026A (en) * 1944-04-18 1946-06-12 Sigurd Kloumann Electrode arrangement in fusion electrolytic cells
GB601873A (en) * 1944-10-10 1948-05-13 Cie De Prod Chim Et Electro Me Improvement in soderberg continuous anodes
US2528905A (en) * 1947-09-08 1950-11-07 Alais & Froges & Camarque Cie Construction of the lower portion of igneous electrolytic cells
DE895380C (de) * 1941-09-30 1953-11-02 Vaw Ver Aluminium Werke Ag Ofen fuer die Schmelzflusselektrolyse von Aluminium
GB740025A (en) * 1953-02-05 1955-11-09 Elektrokemisk As Arrangements of the bus-bars of electrolytic furnaces
US2731407A (en) * 1951-02-20 1956-01-17 Elektrokemisk As Method of collecting gases from aluminum furnaces
US2761830A (en) * 1952-03-22 1956-09-04 Reynolds Metals Co Wiring arrangement for a series of electrolytic cells
US2824057A (en) * 1950-08-12 1958-02-18 Aluminum Co Of America Electrolytic reduction cell for producing aluminum
US2874110A (en) * 1950-08-12 1959-02-17 Aluminum Co Of America Electrolytic reduction cell for producing aluminum

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE506584C (de) * 1930-09-05 Ver Aluminium Werke Akt Ges Reduktionsofen fuer die Aluminium-Erzeugung
DE292109C (no) * 1900-01-01

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US455631A (en) * 1891-07-07 maigrot
US2261684A (en) * 1939-02-23 1941-11-04 Youngstown Sheet And Tube Co Method and apparatus for welding
US2287502A (en) * 1941-06-12 1942-06-23 Bulldog Electric Prod Co Electrical distribution system
DE895380C (de) * 1941-09-30 1953-11-02 Vaw Ver Aluminium Werke Ag Ofen fuer die Schmelzflusselektrolyse von Aluminium
GB578026A (en) * 1944-04-18 1946-06-12 Sigurd Kloumann Electrode arrangement in fusion electrolytic cells
GB601873A (en) * 1944-10-10 1948-05-13 Cie De Prod Chim Et Electro Me Improvement in soderberg continuous anodes
US2528905A (en) * 1947-09-08 1950-11-07 Alais & Froges & Camarque Cie Construction of the lower portion of igneous electrolytic cells
US2824057A (en) * 1950-08-12 1958-02-18 Aluminum Co Of America Electrolytic reduction cell for producing aluminum
US2874110A (en) * 1950-08-12 1959-02-17 Aluminum Co Of America Electrolytic reduction cell for producing aluminum
US2731407A (en) * 1951-02-20 1956-01-17 Elektrokemisk As Method of collecting gases from aluminum furnaces
US2761830A (en) * 1952-03-22 1956-09-04 Reynolds Metals Co Wiring arrangement for a series of electrolytic cells
GB740025A (en) * 1953-02-05 1955-11-09 Elektrokemisk As Arrangements of the bus-bars of electrolytic furnaces

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385778A (en) * 1964-10-21 1968-05-28 Aluminum Co Of America Current collecting method and apparatus for aluminum reduction cells
US3617454A (en) * 1969-11-12 1971-11-02 Arthur F Johnson Bus structure from aluminum reduction cells
US3640800A (en) * 1970-07-14 1972-02-08 Arthur F Johnson Electrolytic cell
JPS5242727B1 (no) * 1970-09-01 1977-10-26
JPS5242728B1 (no) * 1970-09-01 1977-10-26
US3969213A (en) * 1973-10-26 1976-07-13 Nippon Light Metal Company Limited Aluminum electrolytic cells
US4176037A (en) * 1977-07-14 1979-11-27 Ardal Og Sunndal Verk A.S. Conductor arrangement for compensating for horizontal magnetic fields in pots containing a molten electrolytic bath
US4425200A (en) 1980-10-08 1984-01-10 Mitsubishi Keikinzoku Kogyo Kabushiki Kaisha Method and apparatus for stabilizing aluminum metal layers in aluminum electrolytic cells
CN104294318A (zh) * 2013-07-15 2015-01-21 贵阳铝镁设计研究院有限公司 降低铝电解槽焊接部位磁场强度的装置及其操作方法
CN104294318B (zh) * 2013-07-15 2017-09-26 贵阳铝镁设计研究院有限公司 降低铝电解槽焊接部位磁场强度的装置及其操作方法
FR3009564A1 (fr) * 2013-08-09 2015-02-13 Rio Tinto Alcan Int Ltd Aluminerie comprenant un circuit electrique de compensation
CN105452536A (zh) * 2013-08-09 2016-03-30 力拓艾尔坎国际有限公司 包括补偿电路的铝厂
EP3030695A1 (fr) * 2013-08-09 2016-06-15 Rio Tinto Alcan International Limited Aluminerie comprenant un circuit électrique de compensation
EP3030695A4 (fr) * 2013-08-09 2017-03-29 Rio Tinto Alcan International Limited Aluminerie comprenant un circuit électrique de compensation
AU2014305613B2 (en) * 2013-08-09 2017-08-31 Rio Tinto Alcan International Limited Aluminium smelter comprising a compensating electric circuit
CN105452536B (zh) * 2013-08-09 2017-09-19 力拓艾尔坎国际有限公司 包括补偿电路的铝厂
US10344390B2 (en) 2013-08-09 2019-07-09 Rio Tinto Alcan International Limited Aluminium smelter comprising a compensating electric circuit
FR3032460A1 (fr) * 2015-02-09 2016-08-12 Rio Tinto Alcan Int Ltd Cuve d'electrolyse
US10358733B2 (en) 2015-02-09 2019-07-23 Rio Tinto Alcan International Limited Aluminum smelter and method to compensate for a magnetic field created by the circulation of the electrolysis current of said aluminum smelter

Also Published As

Publication number Publication date
CH343649A (fr) 1959-12-31
DE1083554B (de) 1960-06-15
FR1079131A (fr) 1954-11-25
GB794421A (en) 1958-05-07
NL104954C (no) 1900-01-01
NL186581B (nl) 1900-01-01

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