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WO2001027353A1 - Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique - Google Patents

Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique Download PDF

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Publication number
WO2001027353A1
WO2001027353A1 PCT/US2000/027936 US0027936W WO0127353A1 WO 2001027353 A1 WO2001027353 A1 WO 2001027353A1 US 0027936 W US0027936 W US 0027936W WO 0127353 A1 WO0127353 A1 WO 0127353A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
cathode
spacer
cavity
end portion
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.)
Ceased
Application number
PCT/US2000/027936
Other languages
English (en)
Inventor
Graham E. Homley
Claude Gauthier
Louise Pearson
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.)
Alcoa Corp
Original Assignee
Alcoa Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27023473&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2001027353(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US09/416,767 external-priority patent/US6231745B1/en
Priority to DE60019724T priority Critical patent/DE60019724T2/de
Priority to AT00970713T priority patent/ATE294264T1/de
Priority to AU80049/00A priority patent/AU766270B2/en
Priority to NZ511179A priority patent/NZ511179A/xx
Application filed by Alcoa Corp filed Critical Alcoa Corp
Priority to BR0007204-4A priority patent/BR0007204A/pt
Priority to CA002347858A priority patent/CA2347858C/fr
Priority to EP00970713A priority patent/EP1147246B1/fr
Publication of WO2001027353A1 publication Critical patent/WO2001027353A1/fr
Priority to NO20012893A priority patent/NO20012893L/no
Anticipated expiration legal-status Critical
Ceased 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

  • This invention relates to electrolytic cells.
  • this invention relates to cathode collector bars of electrolytic reduction smelting cells used in the production of aluminum.
  • Aluminum is produced by an electrolytic reduction of alumina in an electrolyte.
  • the aluminum produced commercially by the electrolytic reduction of alumina is referred to as primary aluminum.
  • Electrolysis involves an electrochemical oxidation-reduction associated with the decomposition of a compound.
  • An electrical current passes between two electrodes and through molten Na 3 AlF 6 cryolite bath containing dissolved alumina.
  • Cryolite electrolyte is composed of a molten Na 3 AlF 6 cryolite bath containing alumina and other materials, e.g., such as fluorspar, dissolved in the electrolyte.
  • a metallic constituent of the compound is reduced together with a correspondent oxidation reaction.
  • Electrodes are passed between the electrodes from an anode to a cathode to provide electrons at a requisite electromotive force to reduce the metallic constituent which usually is the desired electrolytic product, such as in the electrolytic smelting of aluminum.
  • the electrical energy expended to produce the desired reaction depends on the nature of the compound and the composition of the electrolyte.
  • Hall-Heroult aluminum reduction cells are operated at low voltages (e.g. 4-5 volts) and high electrical currents (e.g. 70,000-325,000 amps).
  • the high electrical current enters the reduction cell through the anode structure and then passes through the cryolite bath, through a molten aluminum metal pad, and then enters a carbon cathode block.
  • the electrical current is carried out of the cell by cathode collector bars.
  • alumina is reduced electrolytically to aluminum at the cathode, and carbon is oxidized largely to carbon dioxide at the anode.
  • the aluminum thus produced, accumulates at the molten aluminum pad and is tapped off periodically.
  • Commercial aluminum reduction cells are operated by maintaining a minimum depth of liquid aluminum in the cell, the surface of which serves as the actual cathode. The minimum aluminum depth is about 2 inches and may be 20 inches.
  • the alumina-cryolite bath is maintained on top of the molten aluminum metal pad at a set depth.
  • the current passes through the cryolite bath at a voltage loss directly proportional to the length of the current path, i.e., the interpolar distance gap between the anode and molten aluminum pad.
  • a typical voltage loss is about 1 volt per inch. Any increase of the anode to cathode spacing restricts the maximum power efficiency and limits the efficiency of the electrolytic cell operation.
  • Much of the voltage drop through an electrolytic cell occurs in the electrolyte and is attributable to electrical resistance of the electrolyte, or electrolytic bath, across the anode-cathode distance.
  • the bath electrical resistance or voltage drop in conventional Hall-Heroult cells for the electrolytic reduction of alumina dissolved in a molten cryolite bath includes a decomposition potential, i.e., energy used in producing aluminum, and an additional voltage attributable to heat energy generated in the inter-electrode spacing by the bath resistance. This latter heat energy makes up 35 to 45 percent of the total voltage drop across the cell, and in comparative measure, as much as twice the voltage drop attributable to decomposition potential.
  • An adverse result from reducing anode-cathode distance is a significant reduction in current efficiency of the cell when the metal produced by electrolysis at the cathode is oxidized by contact with the anode product.
  • aluminum metal produced at the cathode can be oxidized readily back to alumina or aluminum salt by a close proximity to the anodically produced carbon oxide.
  • a reduction in the anode-cathode separation distance provides more contact between anode product and cathode product and significantly accelerates the reoxidation or "back reaction" of reduced metal, thereby decreasing current efficiency.
  • the high amperage electrical current passing through the electrolytic cell produces powerful magnetic fields that induce circulation in the molten aluminum pad leading to problems such as reduced electrical efficiency and "back reaction" of the molten aluminum with the electrolyte.
  • the magnetic fields also vary the depths in unequal distance between the molten aluminum pad and the anode.
  • the motion of the metal pad increases, sometimes violently stirring the molten pad and generating vortices, and causing localized electrical shorting.
  • Metal pad depth variations restrict the reduction of the anode to cathode gap and produce a loss in current efficiency. Power is lost to the electrolyte interposed between the anode and cathode blocks. Movement of the molten aluminum metal pad also contributes to uneven wear on the carbon cathode blocks and can accelerate cell failure.
  • Metal pad turbulence also increases the "back reaction,” or reoxidation, of cathodic products, thereby lowering cell efficiency. Metal pad turbulence accelerates distortion and degradation of the cathode bottom liner through attrition and penetration of the cryolite.
  • steel cathode collector bars extend from the external bus bars through each side of the electrolytic cell into the carbon cathode blocks.
  • the steel cathode collector bars are attached to the cathode blocks with cast iron, carbon glue, or rammed carbonaceous paste to facilitate electrical contact between the carbon cathode blocks and the steel cathode collector bars.
  • the flow of electrical current through the aluminum pad and the carbon cathode follows the path of least resistance.
  • the electrical resistance in a conventional cathode collector bar is proportional to the length of the current path from the point the electric current enters the cathode collector bar to the nearest external bus.
  • the lower resistance of the current path starting at points on the cathode collector bar closer to the external bus causes the flow of current through the molten aluminum pad and carbon cathode blocks to be skewed in that direction.
  • the horizontal components of the flow of electric current interact with the vertical component of the magnetic field, adversely affecting efficient cell operation.
  • the electrical conductivity of steel is so poor relative to the aluminum metal pad that the outer third of the collector bar, nearest the side of the pot, carries the majority of the load, thereby creating a very uneven cathode current distribution within each cathode block. Because of the chemical properties, physical properties, and, in particular, the electrical properties of conventional anthracite cathode blocks, the poor electrical conductivity of steel had not presented a severe process limitation until recently.
  • GCA Gas Calcined Anthracite
  • ECA Electrically Calcined Anthracite
  • cathode manufacturers added an increasing proportion of graphite to the raw cathode block mix. A minimum of 30% graphite seems to be sufficient to avoid thermal shock cracking and to provide reasonable electrical properties and sodium resistance in most instances. Further additions up to 100% graphite aggregate or 100% coke aggregate graphitized at 2,000-3,000°C provide preferred operating and productivity conditions.
  • the rate increases at which the cathode blocks erode or are worn away.
  • a related objective of the present invention is to provide an electrolytic reduction cell apparatus and method utilizing a novel cathode collector bar, including a solid, ferrous metal spacer for maintaining a controlled heat balance in the pot.
  • an apparatus and method for production of aluminum comprises an electrolytic cell for reducing alumina dissolved in a molten salt bath to aluminum metal.
  • An electric current passes between an anode and a cathode through the molten bath, producing aluminum metal adjacent the cathode.
  • the electrolytic cell has cell walls including a first cell wall and a second cell wall, an anode, a carbonaceous cathode block separated from the anode, a bus bar external to the first cell wall, and a collector bar connecting the bus bar with the cathode block.
  • the cathode block preferably defines a slot in which the collector bar is seated.
  • the cell walls define a chamber containing a molten salt bath.
  • the collector bar includes a ferrous metal body and a copper insert.
  • ferrous metal refers to iron and steel, including mild steel, low carbon steel, and stainless steel.
  • copper includes alloys of copper with various other metals including silver. For practice of the present invention we prefer relatively pure forms of copper containing at least 99 wt.% copper because of their excellent electrical conductivity.
  • the collector bar has a ferrous metal body comprising a solid, ferrous metal spacer having an external end portion connected with the bus bar and an internal end portion spaced inwardly of the first cell wall.
  • the spacer improves heat balance in the cell by preventing excessive heat transfer between the copper insert and the bus bar.
  • the ferrous metal body also includes a ferrous metal sheath integral with the spacer and defining a cavity containing the copper insert.
  • the cavity extends between an external end adjacent the internal end portion of the spacer, and an internal opening.
  • the cavity and the copper insert may be polygonal or circular in transverse cross-section. We prefer a cylindrical copper insert inside a cavity having a circular transverse cross-section.
  • the slot in the cathode block preferably contains means for joining the collector bar to the cathode block, preferably an electrically conductive material.
  • This material may be cast iron, carbonaceous glue or rammed carbonaceous paste and is preferably cast iron.
  • the cathode assembly of the present invention is useful for producing aluminum by electrolysis.
  • the cathode assembly is spaced downwardly of an anode in a chamber containing a molten salt bath.
  • An electric current passes from the anode to the cathode assembly, reducing alumina dissolved in the molten salt bath to aluminum deposited in a pad above the cathode block.
  • the copper insert in the collector bar distributes electric current more evenly than in prior art cells having collector bars containing only steel or other ferrous metal.
  • the ferrous metal spacer in the collector bar body reduces heat losses, compared with collector bars having a copper insert connected directly to the bus bar.
  • Figure 1 is a schematic cross-sectional view of a prior art electrolytic cell for aluminum production.
  • Figure 2 is a schematic cross-sectional view of an electrolytic cell for aluminum production in accordance with the present invention.
  • Figure 3 is a schematic view of a collector bar in the electrolytic cell of Figure 2.
  • Figure 4 is a cross-sectional view taken along the lines 4-4 of Figure 3.
  • Figure 5 is a schematic depiction of current paths in a prior art electrolytic cell for aluminum production.
  • Figure 6 is a schematic depiction of current paths in an electrolytic cell of the present invention.
  • the apparatus and method of the present invention provide a novel collector bar that minimizes horizontal electrical currents while controlling heat losses.
  • the novel collector bar of our invention may be incorporated into existing aluminum production cells having standard carbon cathode blocks.
  • FIG. 1 there is shown a prior art electrolytic cell 2 fox aluminum production, having a pair of conventional cathode collector bars 10.
  • the collector bars 10 have a rectangular transverse cross-section and they are fabricated from mild steel. Electrical current enters the cell through anodes 12, passes through an electrolytic bath 14, and a molten metal pad 16, and then enters a carbon cathode block 20. Current is carried out of the cell by the cathode collector bars 10. As shown in Figure 5, electrical current lines 70 are non-uniformly distributed and concentrated more toward ends of the collector bar closest to an external bus bar (not shown).
  • the cell 4 includes a first cell wall 17 and a second wall 18.
  • the cell walls define a chamber 19 lined on its bottom and sides with refractory bricks 21 and containing the molten electrolyte 14.
  • a cathode block 10 has two half-width cathode collector bars 30.
  • Each collector bar 30 extends from a bus bar 46,48 outside the cell walls 17,18, and inwardly toward a center line 50.
  • the collector bars 30 are separated by a gap 58 in the middle of the cell filled by a crushable material or by a piece of carbon or by tamped seam mix or by a mixture of such materials.
  • the gap 58 is filled by a mixture of materials.
  • the cathode block 20 has an upper surface 22 supporting the metal pad 16 and a lower surface 23 defining a slot or groove 24 extending between opposed lateral ends of the block 20.
  • the steel collector bars 30 are received in the slot 24 and secured there by a layer of electrically conductive material, preferably cast iron, joining the collector bars 30 to the block 20.
  • the collector bars 30 each include a ferrous metal body comprising a solid spacer 32 and a sheath 33 defining a cavity 34.
  • Each spacer 32 has an external end portion 35 connected with a bus bar 46 and an internal end portion 36 spaced inwardly of the external end portion 35.
  • the internal end portion 36 is inside the cell wall 17, as shown in Figure 2.
  • a cavity or slot 34 is drilled into an internal side 37 of each collector bar 30.
  • the cavities 34 are machined to have a diameter of about 1.628 inches so that their cross-sectional area is about 2.08 in 2 , in a collector bar having a transverse cross-sectional area of about 24 in 2 .
  • the cavities 34 extend longitudinally, between openings in the collector bar internal sides 37 and internal end portions 36 of the spacers 32.
  • the cavities 34 are positioned centrally inside the collector bars 30, to minimize distortion accompanying heating and cooling.
  • a copper insert 40 comprising a cylindrical rod is placed inside each cavity 34.
  • the copper insert has a diameter of approximately 1.625 ⁇ .0025 inches so that its transverse cross-sectional area is about 2.07 in 2 .
  • copper inserts composed of a high conductivity grade of copper containing about 99.95 - 99.99 wt% copper.
  • An air vent 44 is drilled into each collector bar, between the cavity 34 and a top side.
  • the air vent 44 vents air from the cavity 34 when the copper insert 40 is positioned inside. After the insert 40 is in place, the vent 44 is filled with refractory mortar. If sufficient pressure develops in the cavity 34 to expel the mortar, the vent 44 provides a path for pressure relief.
  • a steel plug 45 is placed in the cavity 34 to enclose the copper insert 40.
  • a small space 47 between the plug 45 and the insert 40 allows for expansion upon heating to operating temperature.
  • the plug 45 is welded to the internal side 37 of the collector bar 20.
  • the space 47 provides an expansion allowance of about 0.65 inch and the steel plug 45 has a length of about 1 inch.
  • the apparatus and method of our invention redirect current in a Hall-Heroult cell to reduce or eliminate inefficiencies attributable to non-uniform electrical currents and horizontal electrical currents.
  • the cathode current path and current distribution are influenced by the differential between electrical conductivity of the aluminum metal pad and the cathode assembly. With a high electrical conductivity differential in favor of the aluminum pad, the preferred current path will be sideways through the metal pad toward a side wall of the pot and then downwardly through the cathode block to the collector bar.
  • FIG. 5 there is shown a current gradient 70 in a prior art pot 2 having an anode 12, a molten metal pad 16, a cathode block 20, and a collector bar 10.
  • the highest current concentration is found directly over the steel collector bar 10 close to an outer end 72 of the cathode block 20.
  • the lowest current distribution is found in the middle of the cathode block 20, adjacent an internal end portion of the collector bar 10. Localized wear patterns observed on the cathode block 20 are deepest in the area of highest electrical current density.
  • the cathode current distribution 70 becomes more concentrated at the outer end 72 of the block.
  • the localized wear rate will increase near the outer end 72 of the block 20 as the graphite content increases and reaches a maximum for graphitized cathode blocks.
  • our cell 2 includes an anode 12, molten metal pad 16, cathode block 20, and a collector bar 30 having a copper insert 40.
  • the current gradient 90 extends from the anode 12 to the metal pad 16 and along the entire length of the cathode block 20.
  • the current distribution pattern 90 is more uniform than the pattern 70 shown in Figure 5.
  • the copper insert 40 increases electrical conductivity of the collector bar 30 by reducing the conductivity differential in favor of the aluminum pad 16, thereby distributing current more evenly across the block 20.

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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)
  • Electron Sources, Ion Sources (AREA)
  • Microwave Tubes (AREA)

Abstract

L'invention concerne une cellule (4) électrolytique destinée à la production d'aluminium, comprenant une paroi (7, 18), un barre omnibus (46, 48), un bloc (10) cathodique carboné et une barre (30) collectrice connectant la barre omnibus au bloc cathodique. La barre collectrice se compose d'un corps de métal ferreux comprenant un élément (32) d'espacement plein et une gaine (33) qui délimite une cavité (34) contenant une âme (40) en cuivre. L'élément d'espacement comprend une partie (35) terminale externe reliée à la barre omnibus et une partie (36) terminale interne qui est de préférence séparée de la paroi de la cellule par un retrait vers l'intérieur. L'élément d'espacement sépare l'âme en cuivre de la barre omnibus et réduit ainsi les pertes thermiques de la cellule.
PCT/US2000/027936 1999-10-13 2000-10-10 Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique Ceased WO2001027353A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP00970713A EP1147246B1 (fr) 1999-10-13 2000-10-10 Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique
CA002347858A CA2347858C (fr) 1999-10-13 2000-10-10 Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique
AT00970713T ATE294264T1 (de) 1999-10-13 2000-10-10 Kathodenkollektor mit abstandshalter für verbesserte wärmebilanz
AU80049/00A AU766270B2 (en) 1999-10-13 2000-10-10 Cathode collector bar with spacer for improved heat balance
NZ511179A NZ511179A (en) 1999-10-13 2000-10-10 Cathode collector bar with spacer for improved heat balance
DE60019724T DE60019724T2 (de) 1999-10-13 2000-10-10 Kathodenkollektor mit abstandshalter für verbesserte wärmebilanz
BR0007204-4A BR0007204A (pt) 1999-10-13 2000-10-10 Barra coletora de catodo com espaçador para equilìbrio térmico aperfeiçoado
NO20012893A NO20012893L (no) 1999-10-13 2001-06-12 Katode-samlestang med avstandsholder for bedret varmebalanse

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/416,767 US6231745B1 (en) 1999-10-13 1999-10-13 Cathode collector bar
US08/416,767 1999-10-13
US09/546,273 US6387237B1 (en) 1999-10-13 2000-04-10 Cathode collector bar with spacer for improved heat balance and method
US09/546,273 2000-04-10

Publications (1)

Publication Number Publication Date
WO2001027353A1 true WO2001027353A1 (fr) 2001-04-19

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ID=27023473

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/027936 Ceased WO2001027353A1 (fr) 1999-10-13 2000-10-10 Barre collectrice de cathode avec element d'espacement permettant d'ameliorer le bilan thermique

Country Status (12)

Country Link
EP (1) EP1147246B1 (fr)
CN (1) CN1213171C (fr)
AT (1) ATE294264T1 (fr)
AU (1) AU766270B2 (fr)
BR (1) BR0007204A (fr)
CA (1) CA2347858C (fr)
DE (1) DE60019724T2 (fr)
ES (1) ES2238319T3 (fr)
NO (1) NO20012893L (fr)
NZ (1) NZ511179A (fr)
RU (1) RU2239007C2 (fr)
WO (1) WO2001027353A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003014423A1 (fr) * 2000-06-08 2003-02-20 Alcoa Inc. Barre de cathode collectrice a trois elements
WO2004059039A1 (fr) * 2002-12-30 2004-07-15 Sgl Carbon Ag Systemes de cathode pour la production electrolytique d'aluminium
CN100385044C (zh) * 2001-08-09 2008-04-30 阿尔科公司 组合的阴极集流杆
WO2009055844A1 (fr) * 2007-10-29 2009-05-07 Bhp Billiton Innovation Pty Ltd Barre composite de collecteur
US7618519B2 (en) 2004-04-02 2009-11-17 Aluminum Pechiney Cathode element for use in an electrolytic cell intended for production of aluminum
WO2011148347A1 (fr) 2010-05-28 2011-12-01 Kan-Nak S.A. Conception de cathode de cellule hall-héroult
US8500970B2 (en) 2006-11-22 2013-08-06 Rio Tinto Alcan International Limited Electrolysis cell for the production of aluminum comprising means to reduce the voltage drop
EP2896081A4 (fr) * 2012-09-11 2016-03-23 Alcoa Inc Appareil à barre de prélèvement de courant, système et procédé pour son utilisation
WO2016079605A1 (fr) 2014-11-18 2016-05-26 Kan-Nak S.A. Collecteur de courant cathodique pour cellule hall-heroult
GB2548830A (en) * 2016-03-29 2017-10-04 Dubai Aluminium Pjsc Cathode block with copper-aluminium insert for electrolytic cell suitable for the Hall-Héroult process
US20170283968A1 (en) * 2016-03-30 2017-10-05 Alcoa Usa Corp. Apparatuses and systems for vertical electrolysis cells
WO2018019888A1 (fr) 2016-07-26 2018-02-01 Sgl Cfl Ce Gmbh Collecteur de courant cathodique pour cellule de hall-héroult
WO2018019910A1 (fr) * 2016-07-26 2018-02-01 Sgl Cfl Ce Gmbh Ensemble cathode pour la production d'aluminium
WO2021240353A1 (fr) * 2020-05-26 2021-12-02 Dubai Aluminium Pjsc Ensemble cathode avec systèmes de barres collectrices métalliques pour cellule d'électrolyse se prêtant au procédé hall-héroult
WO2022139588A1 (fr) 2020-12-21 2022-06-30 Storvik As Procédé de production d'une barre d'acier de cathode pourvue d'un insert en cuivre, et procédé de retrait d'un insert en cuivre d'une barre de cathode usagée
DE102022129668A1 (de) 2022-11-09 2024-05-16 Novalum Sa Kathodenstromkollektor und -verbinderanordnung für eine Aluminium-Elektrolysezelle
WO2024100103A1 (fr) 2022-11-09 2024-05-16 Tokai Cobex Gmbh Ensemble collecteur de courant de cathode pour cellule d'électrolyse d'aluminium
DE102022129669A1 (de) 2022-11-09 2024-05-16 Novalum Sa Kathodenstromkollektor und -verbinderanordnung für eine Aluminium-Elektrolysezelle

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RU2281986C1 (ru) * 2005-02-22 2006-08-20 Общество с ограниченной ответственностью "Инженерно-технологический центр" Электролизер для получения алюминия из смеси расплавленных солей и глинозема
RU2285754C1 (ru) * 2005-03-29 2006-10-20 Общество с ограниченной ответственностью "Инженерно-технологический центр" Катодная секция алюминиевого электролизера
RU2348743C2 (ru) * 2007-03-15 2009-03-10 Общество с ограниченной ответственностью "Русская инжиниринговая компания" Катодный токоведущий стержень алюминиевого электролизера
CN101368282B (zh) * 2007-08-14 2012-07-11 北京有色金属研究总院 下阴极稀土金属电解槽及采用该电解槽的电解工艺
RU2510818C1 (ru) * 2012-10-25 2014-04-10 Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" Катодная секция алюминиевого электролизера
CN110093629A (zh) * 2018-01-30 2019-08-06 沈阳铝镁设计研究院有限公司 一种铝电解槽用节能型复合阴极钢棒
CN116180158A (zh) * 2021-11-26 2023-05-30 江苏上阳金属新材料有限公司 一种新型铜棒及其加工工艺

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US3551319A (en) * 1968-09-06 1970-12-29 Kaiser Aluminium Chem Corp Current collector
FR2351192A1 (fr) * 1976-05-13 1977-12-09 Alusuisse Procede et dispositif pour la production d'aluminium par electrolyse ignee
US4795540A (en) * 1987-05-19 1989-01-03 Comalco Aluminum, Ltd. Slotted cathode collector bar for electrolyte reduction cell
US5976333A (en) * 1998-01-06 1999-11-02 Pate; Ray H. Collector bar

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FR2560613B2 (fr) * 1983-05-16 1987-03-27 Pechiney Aluminium Perfectionnement aux barres cathodiques comportant une semelle metallique, pour cuves d'electrolyse hall-heroult
SU1260412A1 (ru) * 1984-12-21 1986-09-30 Красноярский Ордена Трудового Красного Знамени Институт Цветных Металлов Им.М.И.Калинина Катодна секци алюминиевого электролизера

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Publication number Priority date Publication date Assignee Title
FR1161632A (fr) * 1956-11-16 1958-09-02 Pechiney Perfectionnements aux cellules d'électrolyse ignée
US3551319A (en) * 1968-09-06 1970-12-29 Kaiser Aluminium Chem Corp Current collector
FR2351192A1 (fr) * 1976-05-13 1977-12-09 Alusuisse Procede et dispositif pour la production d'aluminium par electrolyse ignee
US4795540A (en) * 1987-05-19 1989-01-03 Comalco Aluminum, Ltd. Slotted cathode collector bar for electrolyte reduction cell
US5976333A (en) * 1998-01-06 1999-11-02 Pate; Ray H. Collector bar

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003014423A1 (fr) * 2000-06-08 2003-02-20 Alcoa Inc. Barre de cathode collectrice a trois elements
CN100385044C (zh) * 2001-08-09 2008-04-30 阿尔科公司 组合的阴极集流杆
WO2004059039A1 (fr) * 2002-12-30 2004-07-15 Sgl Carbon Ag Systemes de cathode pour la production electrolytique d'aluminium
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RU2239007C2 (ru) 2004-10-27
AU8004900A (en) 2001-04-23
EP1147246A1 (fr) 2001-10-24
CA2347858C (fr) 2007-09-11
DE60019724D1 (de) 2005-06-02
BR0007204A (pt) 2001-10-16
EP1147246B1 (fr) 2005-04-27
CN1327488A (zh) 2001-12-19
ATE294264T1 (de) 2005-05-15
AU766270B2 (en) 2003-10-09
NZ511179A (en) 2003-02-28
NO20012893D0 (no) 2001-06-12
NO20012893L (no) 2001-06-12
CN1213171C (zh) 2005-08-03
DE60019724T2 (de) 2006-01-19
CA2347858A1 (fr) 2001-04-19
ES2238319T3 (es) 2005-09-01

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