US3787311A - Cathode for the winning of aluminum - Google Patents
Cathode for the winning of aluminum Download PDFInfo
- Publication number
- US3787311A US3787311A US00207457A US3787311DA US3787311A US 3787311 A US3787311 A US 3787311A US 00207457 A US00207457 A US 00207457A US 3787311D A US3787311D A US 3787311DA US 3787311 A US3787311 A US 3787311A
- Authority
- US
- United States
- Prior art keywords
- cathode
- blocks
- floor
- carbon
- aluminum
- 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
Links
Images
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
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
-
- 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
- ABSTRACT In the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte, wherein the electrolysis current passes through the surface of a carbon cathode, the electrolysis current is equalized over the surface of the carbon cathode.
- the present invention relates to the winning of aluminum in an electrolysis cell. More particularly, the pres ent invention relates to a method of operating such acell and to a carbon cathode for such a cell, the cathode including carbon blocks having conductivities varying in steps from neighboring blocks.
- electrolysis cells In the winning of aluminum by the electrolysis of alumina (A1 dissolved in cryolite, electrolysis cells are used whose floor is constructed of an array of carbon blocks. These blocks collectively form the cathode. By means of a suitable bonding mass, for example unfired electrode mass, these carbon blocks are so connected to one another that an impermeable floor for collecting liquid metal is formed.
- the carbon blocks assembled into a cell floor have all had the same chemical and physical properties. Thus, it has not mattered which particular block was placed at any given position in a cell floor.
- the achievement of this object by the present invention is based on the recognition that such disadvantages arise due to a gradient in the electrical resistance which is presented to current flowing through the abovedescribed cathodes built of carbon blocks of uniform electrical conductivity.
- This gradient exists in going from the middle of a cell floor cross to the borders of the floor.
- the path is of lower resistance from the molten aluminum, through the cathode, to a bus bar, when current enters the cathode floor at a border location, than when current enters the cathode floor at a central position.
- FIG. I is a plan view of the essential portions of a cathode block floor according to the invention.
- FIG. 2a is a side view of one of the thirteen sets of cathode blocks of FIG. 1.
- FIG. 2b is an end view of the set of FIG. 2a.
- FIG. 3 represents the approximate equivalent electrical circuit of the structure of the invention.
- the current density of the electrolysis current is the same over the entire cathode surface.
- the electrolysis current is equalized over the cathode surface by means of a cathode made of an array of carbon blocks of different electrical conductivities. These blocks are so arranged in the direction of cathode current withdrawal leads that a uniform current distribution is assured.
- the carbon blocks are so placed that the electrical resistance of the carbon blocks increases in steps from the cathode middle outwards in the direction of the pins. The steps are chosen to provide a substantially uniform current density over the cathode surface.
- the number of carbon blocks and their resistance parameters depends on the cell size and type and must be recalculated when considering a new aluminum electrolysis cell.
- the cathode can be constructed of carbon blocks whose electrical resistances increase continuously outwards in the direction of the cathode leads. This eliminates the discontinuities caused by the stepwise increasing of resistance in the previous embodiment.
- FIG. 2a corresponds, for example, to the view of the carbon cathode floor appearing in FIG. 4 of the article entitled Aluminum in the McGRAW-HILL ENCYCLOPEDIA OF SCIENCE AND TECHNOLOGY, McGrawHill Book Company, New York (1966), at page 294.
- the array of carbon blocks forming the floor includes blocks of three different resistivities. These three types of blocks are designated as blocks 3, blocks 4, and blocks 5. Along any of the thirteen continuous, steel, cathode pins 2, carbon blocks are arranged in electrical contact with the pins in the sequence block 3, block 4, block 5, block 4, block 3. The centers 3 of the blocks 5 are staggered alternately on one or the other side of the center line 9 of the floor; this somewhat smoothes out the effect of the resistance steps of one block to another along any one pin 2.
- FIG. 3 shows a simplified equivalent circuit for the floor structure.
- Resistances R R and R represent the resistances of carbon blocks 3, 4, and 5, respectively.
- Resistance R represents the resistance of the steel pin 2 between points 10 and II in FIG. 2a, and resistance R represents the resistance of pin 2 between points 11 and 12.
- the voltage at points 13, I4, and 15, where the molten aluminum contacts blocks 3, 4, and 5, respec- Also, because the shapes of the blocks are the same, and the shapes of the steel sections, between points and 11, and 11 and 12, are the same, the following relationships also hold:
- the dimensions of the carbon blocks are 500 mm X 500 mm X 380 mm and the dimensions of the steel pins (cross section) are 140 mm X 140 mm.
- Carbon blocks with resistivities varying between 9.0 and 35.5 ohm mm meter are known. Manufacturers of such carbon blocks are, e.g., Siemens Griessheim AG and Conradty GmbH., Nurnberg.
- Carbon blocks with defined resistivity can be produced by heating the blocks. The higher the temperature and the longer the heating time, the higher is the amount of graphite and the conductivity.
- a carbon cathode for the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte comprising an array of carbon blocks, with neighboring blocks in the array having different resistances, the difference in resistance between neighboring blocks being in a direction to equalize the current distribution between said blocks.
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)
Abstract
In the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte, wherein the electrolysis current passes through the surface of a carbon cathode, the electrolysis current is equalized over the surface of the carbon cathode.
Description
Wittner et a1.
[ Jan. 22, 11974 CATHODE FOR THE WHN a ALUMINUM Inventors: Hubert Wittner,
Ludwigshafen-Mundenheim; Kurt Lauei', Schriesheim, both of Germany Gehr. Giulini Gmhi-li, Ludwigshafen am Rhein, Germany Filed: net. 13, 1971 Appl. No.: 207,457
Assignee:
Foreign Application Priority Data Dec. 12, 1970 Germany....., P 20 61 263.9
US. Cl. 204/294, 204/243 R lint. Cl B01111 3/08, C22d 3/02 Field M Search 243 R 247 [56] References Cited UNITED STATES PATENTS 3,470,083 9/1969 Wrigge 204/243 R 3,582,483 6/1971 Sem 204/243 R 2,728,109 12/1955 Bonnot 204/294 X 3,514,520 5/1970 Bacchiega et a]. 204/243 R X Primary Examinerlloward S. Williams Assistant ExaminerD. R. Valentine Attorney, Agent, or Firm-George H. Spencer et a1.
[57] ABSTRACT In the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte, wherein the electrolysis current passes through the surface of a carbon cathode, the electrolysis current is equalized over the surface of the carbon cathode.
2 Claims, 4 Drawing Figures CATIIODE FOR THE WINNING OlF ALUMINUM BACKGROUND OF THE INVENTION The present invention relates to the winning of aluminum in an electrolysis cell. More particularly, the pres ent invention relates to a method of operating such acell and to a carbon cathode for such a cell, the cathode including carbon blocks having conductivities varying in steps from neighboring blocks.
In the winning of aluminum by the electrolysis of alumina (A1 dissolved in cryolite, electrolysis cells are used whose floor is constructed of an array of carbon blocks. These blocks collectively form the cathode. By means of a suitable bonding mass, for example unfired electrode mass, these carbon blocks are so connected to one another that an impermeable floor for collecting liquid metal is formed. The carbon blocks assembled into a cell floor have all had the same chemical and physical properties. Thus, it has not mattered which particular block was placed at any given position in a cell floor.
SUMMARY OF THE INVENTION It has been observed that when cells having the above-described carbon-block cathode floors are operated, certain disadvantages arise, especially in cells operated at high currents. For example, the central area of the cathodic floor grows upwards and this causes a lessening of its useful life. Also, the efficiency of utilization of electrial current is negatively influenced by curvatures in the bath surface due to magnetic field distortions.
It is an object of the present invention to provide cell operational method and cell structure for eliminating such disadvantages.
The achievement of this object by the present invention is based on the recognition that such disadvantages arise due to a gradient in the electrical resistance which is presented to current flowing through the abovedescribed cathodes built of carbon blocks of uniform electrical conductivity. This gradient exists in going from the middle of a cell floor cross to the borders of the floor. The path is of lower resistance from the molten aluminum, through the cathode, to a bus bar, when current enters the cathode floor at a border location, than when current enters the cathode floor at a central position. This has caused the electron flow to enter the molten aluminum from the cathode floor with a greater electron flow density at floor border regions than at floor central regions. This has meant that the carbon cathode has been loaded by the electrolysis current only scarcely at its middle but very strongly at its borders.
The above object as well as other objects which will become apparent in the discussion that follows are achieved, according to the present invention, by equalizing the electrolysis current over the surface of a carbon cathode present in the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte.
BRIEF DESCRIPTION OF THE DRAWING FIG. I is a plan view of the essential portions of a cathode block floor according to the invention.
FIG. 2a is a side view of one of the thirteen sets of cathode blocks of FIG. 1.
FIG. 2b is an end view of the set of FIG. 2a.
FIG. 3 represents the approximate equivalent electrical circuit of the structure of the invention.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the current density of the electrolysis current is the same over the entire cathode surface.
According to a preferred embodiment of the invention, the electrolysis current is equalized over the cathode surface by means of a cathode made of an array of carbon blocks of different electrical conductivities. These blocks are so arranged in the direction of cathode current withdrawal leads that a uniform current distribution is assured. In electrolysis cells with horizontally situated, continuous or divided cathode pins of metal for connecting the blocks with bus bars, the carbon blocks are so placed that the electrical resistance of the carbon blocks increases in steps from the cathode middle outwards in the direction of the pins. The steps are chosen to provide a substantially uniform current density over the cathode surface. The number of carbon blocks and their resistance parameters depends on the cell size and type and must be recalculated when considering a new aluminum electrolysis cell.
According to another embodiment of the invention, the cathode can be constructed of carbon blocks whose electrical resistances increase continuously outwards in the direction of the cathode leads. This eliminates the discontinuities caused by the stepwise increasing of resistance in the previous embodiment.
Referring now to the drawing, there is shown the essential structure of a carbon block floor I of an aluminum electrolysis cell. The view is down onto the plane of the floor. Bonding mass and the sides of the cell for containment of the molten aluminum and cryolite are not shown. The side view in FIG. 2a corresponds, for example, to the view of the carbon cathode floor appearing in FIG. 4 of the article entitled Aluminum in the McGRAW-HILL ENCYCLOPEDIA OF SCIENCE AND TECHNOLOGY, McGrawHill Book Company, New York (1966), at page 294.
The array of carbon blocks forming the floor includes blocks of three different resistivities. These three types of blocks are designated as blocks 3, blocks 4, and blocks 5. Along any of the thirteen continuous, steel, cathode pins 2, carbon blocks are arranged in electrical contact with the pins in the sequence block 3, block 4, block 5, block 4, block 3. The centers 3 of the blocks 5 are staggered alternately on one or the other side of the center line 9 of the floor; this somewhat smoothes out the effect of the resistance steps of one block to another along any one pin 2.
If an electrolysis cell provided with a cathodic floor of FIG. I is loaded with a current of 110,000 amperes, a uniform distribution of current over the surface of the floor is obtained when the resistivities at 900C, p p p of carbon blocks 5, 4, and 3 equal 9.0, 22.2, and 35.5 ohm'mm lmeter, respectively.
FIG. 3 shows a simplified equivalent circuit for the floor structure. Resistances R R and R represent the resistances of carbon blocks 3, 4, and 5, respectively. Resistance R represents the resistance of the steel pin 2 between points 10 and II in FIG. 2a, and resistance R represents the resistance of pin 2 between points 11 and 12. The voltage at points 13, I4, and 15, where the molten aluminum contacts blocks 3, 4, and 5, respec- Also, because the shapes of the blocks are the same, and the shapes of the steel sections, between points and 11, and 11 and 12, are the same, the following relationships also hold:
p5 pateel p4 psteel Pa where k and m are the shape factors for computing the resistances from the resistivities.
In an electrolysis cell provided with the cathodic floor of H6. 1 and loaded with a current of 110,000 amperes, the dimensions of the carbon blocks are 500 mm X 500 mm X 380 mm and the dimensions of the steel pins (cross section) are 140 mm X 140 mm. Carbon blocks with resistivities varying between 9.0 and 35.5 ohm mm meter are known. Manufacturers of such carbon blocks are, e.g., Siemens Griessheim AG and Conradty GmbH., Nurnberg.
Carbon blocks with defined resistivity can be produced by heating the blocks. The higher the temperature and the longer the heating time, the higher is the amount of graphite and the conductivity.
It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.
We claim:
1. A carbon cathode for the winning of aluminum by the electrolysis of alumina dissolved in molten electrolyte, comprising an array of carbon blocks, with neighboring blocks in the array having different resistances, the difference in resistance between neighboring blocks being in a direction to equalize the current distribution between said blocks.
2. A carbon cathode as claimed in claim 1, further comprising a cathode current withdrawal lead in the array, with the block resistances increasing from the middle of the array outwards in the direction of the current withdrawal lead.
Claims (1)
- 2. A carbon cathode as claimed in claim 1, further comprising a cathode current withdrawal lead in the array, with the block resistances increasing from the middle of the array outwards in the direction of the current withdrawal lead.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702061263 DE2061263C3 (en) | 1970-12-12 | Aluminum production in an electrolysis furnace by fused-salt electrolysis with a cathode made of carbon blocks of graded conductivity |
Publications (1)
Publication Number | Publication Date |
---|---|
US3787311A true US3787311A (en) | 1974-01-22 |
Family
ID=5790788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00207457A Expired - Lifetime US3787311A (en) | 1970-12-12 | 1971-12-13 | Cathode for the winning of aluminum |
Country Status (7)
Country | Link |
---|---|
US (1) | US3787311A (en) |
JP (1) | JPS5539630B1 (en) |
CA (1) | CA968744A (en) |
FR (1) | FR2117960B1 (en) |
IT (1) | IT940400B (en) |
NL (1) | NL7117021A (en) |
NO (1) | NO128335B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USB430385I5 (en) * | 1974-01-03 | 1975-01-28 | ||
US4194959A (en) * | 1977-11-23 | 1980-03-25 | Alcan Research And Development Limited | Electrolytic reduction cells |
US4737256A (en) * | 1985-10-24 | 1988-04-12 | Ardal Og Sunndal Verk A.S. | Laminated carbon cathode for cells for the production of aluminium by electrolytic smelting |
EP1233083A1 (en) * | 2001-02-14 | 2002-08-21 | Alcan Technology & Management AG | Carbon bottom of electrolysis cell used in the production of aluminum |
WO2003056069A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for graphitizing cathode blocks |
WO2003056071A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for graphitizing cathode blocks |
WO2003056070A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for the graphitization of cathode blocks |
US6627062B1 (en) | 1999-02-02 | 2003-09-30 | Carbone Savoie | Graphite cathode for the electrolysis of aluminium |
EP2650404A1 (en) * | 2012-04-12 | 2013-10-16 | SGL Carbon SE | Electrolysis cell, in particular for the production of aluminium |
CN104451777A (en) * | 2013-09-25 | 2015-03-25 | 贵阳铝镁设计研究院有限公司 | Collocation method of anode on electrolytic bath |
NO20141572A1 (en) * | 2014-12-23 | 2016-06-24 | Norsk Hydro As | A modified electrolytic cell and a method for modifying the same |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH620948A5 (en) * | 1976-05-13 | 1980-12-31 | Alusuisse | |
FR2566002B1 (en) * | 1984-06-13 | 1986-11-21 | Pechiney Aluminium | MODULAR CATHODE BLOCK AND LOW VOLTAGE DROP CATHODE FOR HALL-HEROULT ELECTROLYSIS TANKS |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2728109A (en) * | 1952-06-06 | 1955-12-27 | Savoie Electrodes Refract | Method of making cathodic electrodes for electrolysis furnaces |
US3470083A (en) * | 1963-11-22 | 1969-09-30 | Vaw Ver Aluminium Werke Ag | Electrolytic cell cathode bottom with vertically inserted current conductor |
US3514520A (en) * | 1967-02-01 | 1970-05-26 | Montedison Spa | Linings of electrolysis,remelting,and similar furnaces,containing molten metals,alone or together with molten salts |
US3582483A (en) * | 1962-06-29 | 1971-06-01 | Elektrokemisk As | Process for electrolytically producing aluminum |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2786024A (en) * | 1953-04-16 | 1957-03-19 | Elektrokemisk As | Arrangement of cathode bars in electrolytic pots |
US3385778A (en) * | 1964-10-21 | 1968-05-28 | Aluminum Co Of America | Current collecting method and apparatus for aluminum reduction cells |
-
1971
- 1971-12-08 CA CA129,627A patent/CA968744A/en not_active Expired
- 1971-12-09 FR FR7144149A patent/FR2117960B1/fr not_active Expired
- 1971-12-09 IT IT13083/71A patent/IT940400B/en active
- 1971-12-10 NO NO04555/71*[A patent/NO128335B/no unknown
- 1971-12-10 NL NL7117021A patent/NL7117021A/xx unknown
- 1971-12-13 JP JP10095071A patent/JPS5539630B1/ja active Pending
- 1971-12-13 US US00207457A patent/US3787311A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2728109A (en) * | 1952-06-06 | 1955-12-27 | Savoie Electrodes Refract | Method of making cathodic electrodes for electrolysis furnaces |
US3582483A (en) * | 1962-06-29 | 1971-06-01 | Elektrokemisk As | Process for electrolytically producing aluminum |
US3470083A (en) * | 1963-11-22 | 1969-09-30 | Vaw Ver Aluminium Werke Ag | Electrolytic cell cathode bottom with vertically inserted current conductor |
US3514520A (en) * | 1967-02-01 | 1970-05-26 | Montedison Spa | Linings of electrolysis,remelting,and similar furnaces,containing molten metals,alone or together with molten salts |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4001104A (en) * | 1974-01-03 | 1977-01-04 | Union Carbide Corporation | Cemented collector bar assemblies for aluminum cell carbon bottom block |
USB430385I5 (en) * | 1974-01-03 | 1975-01-28 | ||
US4194959A (en) * | 1977-11-23 | 1980-03-25 | Alcan Research And Development Limited | Electrolytic reduction cells |
US4737256A (en) * | 1985-10-24 | 1988-04-12 | Ardal Og Sunndal Verk A.S. | Laminated carbon cathode for cells for the production of aluminium by electrolytic smelting |
US6627062B1 (en) | 1999-02-02 | 2003-09-30 | Carbone Savoie | Graphite cathode for the electrolysis of aluminium |
AU776902B2 (en) * | 1999-02-02 | 2004-09-23 | Carbone Savoie | Graphite cathode for electrolysis of aluminium |
WO2002064860A1 (en) * | 2001-02-14 | 2002-08-22 | Alcan Technology & Management Ag | Carbon bottom of an electrolysis cell for producing aluminum |
EP1233083A1 (en) * | 2001-02-14 | 2002-08-21 | Alcan Technology & Management AG | Carbon bottom of electrolysis cell used in the production of aluminum |
WO2003056071A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for graphitizing cathode blocks |
WO2003056070A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for the graphitization of cathode blocks |
WO2003056069A1 (en) * | 2001-12-28 | 2003-07-10 | Sgl Carbon Ag | Method for graphitizing cathode blocks |
CN104428451A (en) * | 2012-04-12 | 2015-03-18 | 西格里碳素欧洲公司 | Electrolysis cell, in particular for the production of aluminum |
WO2013153053A1 (en) * | 2012-04-12 | 2013-10-17 | Sgl Carbon Se | Electrolysis cell, in particular for the production of aluminum |
EP2650404A1 (en) * | 2012-04-12 | 2013-10-16 | SGL Carbon SE | Electrolysis cell, in particular for the production of aluminium |
RU2630114C2 (en) * | 2012-04-12 | 2017-09-05 | Сгл Карбон Се | Electrolyser, in particular, for obtaining aluminium |
US10801118B2 (en) | 2012-04-12 | 2020-10-13 | Tokai Cobex Gmbh | Electrolysis cell, in particular for the production of aluminum |
CN104451777A (en) * | 2013-09-25 | 2015-03-25 | 贵阳铝镁设计研究院有限公司 | Collocation method of anode on electrolytic bath |
NO20141572A1 (en) * | 2014-12-23 | 2016-06-24 | Norsk Hydro As | A modified electrolytic cell and a method for modifying the same |
WO2016105204A1 (en) | 2014-12-23 | 2016-06-30 | Norsk Hydro Asa | A modified electrolysis cell and a method for modifying same |
US10689770B2 (en) | 2014-12-23 | 2020-06-23 | Norsk Hydro Asa | Modified electrolysis cell and a method for modifying same |
EA037336B1 (en) * | 2014-12-23 | 2021-03-15 | Норск Хюдро Аса | Modified electrolysis cell and method for modifying same |
Also Published As
Publication number | Publication date |
---|---|
FR2117960B1 (en) | 1974-11-15 |
NL7117021A (en) | 1972-06-14 |
FR2117960A1 (en) | 1972-07-28 |
NO128335B (en) | 1973-10-29 |
DE2061263A1 (en) | 1972-06-29 |
IT940400B (en) | 1973-02-10 |
JPS5539630B1 (en) | 1980-10-13 |
CA968744A (en) | 1975-06-03 |
DE2061263B2 (en) | 1975-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3787311A (en) | Cathode for the winning of aluminum | |
CN102016124B (en) | Electrolysis cell for the production of aluminium comprising means to reduce the voltage drop | |
JP5849099B2 (en) | Anode-cathode power distribution system for electrochemical reduction and method of use thereof | |
CA2553926C (en) | Process and plant for electrodepositing copper | |
CN103649376A (en) | Aluminum smelter including cells having a cathode outlet through the base of the casing, and a means for stabilizing the cells | |
WO2004031452A1 (en) | Collector bar providing discontinuous electrical connection to cathode block | |
CA1111376A (en) | Electrolytic reduction cells | |
CA1232868A (en) | Arrangement of busbars for electrolytic reduction cell | |
CA1178241A (en) | Arrangement of busbars for electrolytic reduction cells | |
US4313811A (en) | Arrangement of busbars for electrolytic cells | |
US2824057A (en) | Electrolytic reduction cell for producing aluminum | |
CN104073841B (en) | A kind of silver electrolysis bath | |
JPS61183488A (en) | Hall/ale electrolytic cell having asymmetric cathode rod andheat insulating material | |
US2761830A (en) | Wiring arrangement for a series of electrolytic cells | |
US2999801A (en) | Apparatus for supplying current to high amperage electrolytic cells | |
BR112017013384B1 (en) | Method for reducing metal shim irregularity and optimizing mhd stability in a hall-heroult type electrolysis cell, e, electrolysis cell | |
US3385778A (en) | Current collecting method and apparatus for aluminum reduction cells | |
GB1335221A (en) | Support assemblies for electrolytic deposition on contact elements | |
RU2164557C2 (en) | Busbars system of aluminium cell | |
EP0068783A2 (en) | Improvements in electrolytic reduction cells | |
CN220665486U (en) | Flying target hanger for improving conductivity uniformity | |
CN220643307U (en) | Clamping groove type conductive device and horizontal electroplating equipment | |
US3692658A (en) | Current supply for electrolysis cells | |
EP3004427B1 (en) | Configurations and positioning of contact bar segments on a capping board for enhanced current density homogeneity and/or short circuit reduction | |
KR810000248B1 (en) | A device for the supply of electric current to transverse igneous electrolysis tanks |