EP0018326B1 - Abdeckhaube für eine Aluminiumreduktionszelle - Google Patents

Abdeckhaube für eine Aluminiumreduktionszelle Download PDF

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Publication number
EP0018326B1
EP0018326B1 EP80810122A EP80810122A EP0018326B1 EP 0018326 B1 EP0018326 B1 EP 0018326B1 EP 80810122 A EP80810122 A EP 80810122A EP 80810122 A EP80810122 A EP 80810122A EP 0018326 B1 EP0018326 B1 EP 0018326B1
Authority
EP
European Patent Office
Prior art keywords
plates
cover
cover plates
cell
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80810122A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0018326A1 (de
Inventor
Donald R. Bradford
James E. White
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT80810122T priority Critical patent/ATE9233T1/de
Publication of EP0018326A1 publication Critical patent/EP0018326A1/de
Application granted granted Critical
Publication of EP0018326B1 publication Critical patent/EP0018326B1/de
Expired 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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes

Definitions

  • the present invention relates to a cover for an aluminum reduction cell operating in the melt flow, with a trough containing the separated liquid metal and the electrolyte and a plurality of carbon anodes immersed in the molten electrolyte, the cover covering a container covering the area between the two anode support sides with an as Wing formed lower edge and several of this edge over the entire longitudinal direction of the cell to the board of the electrolysis tub sloping mobile cover plates.
  • the electrolysis cells work with currents of 45-225 kA (kiloamperes).
  • Typical aluminum reduction cells include a coal pan surrounded by insulating material. The bottom of the coal trough is provided with embedded steel bars through which the electrolysis current flows, the trough acts as the cathode of the reduction cell.
  • the tub is partially filled with an aluminum bath on which the essentially melted cryolite (Na 3 AIF 6 ) and clay (AI 2 0 3 ) dissolved therein contains electrolyte.
  • One or more carbon anodes are immersed in the molten electrolyte. During the passage of the direct current from the carbon anodes to the liquid aluminum, the Al 2 0 3 dissolved in the electrolyte is dissociated.
  • U.S. Patent 3,948,749 shows a typical hood arrangement.
  • This patent shows a conventional hood, which has a large number of plates, the size and weight of which is intended to enable convenient and easy removal by hand, so that easy access is ensured for viewing and operating the cell.
  • This requirement for lighter, hand-removable plates means that a large number of plates must be used to encapsulate the reduction cell, which results in a corresponding increase in the number of surfaces to be sealed and connections to be sealed.
  • the plates are typically made of light aluminum or aluminum alloys to mitigate the effects of the high magnetic folders that would occur with steel plates, because these magnetic fields would increase the force required to remove the plates. When using aluminum, the weight of the plates can therefore be considerably reduced.
  • the inventors have therefore set themselves the task of creating a cover for an aluminum cell working in the melt flow, which has a high efficiency for collecting the gases, can be easily removed by hand and is not damaged by the high working temperatures of the cell.
  • the achievement of the object according to the invention is characterized in that the mobile cover plates made of steel rest sealingly on the lower edge of the steel container and the two long sides of the carbon lining of the electrolysis bath in such a way that part of the cover plates in the longitudinal direction of the cell over the other part of the cover plates by hand is easy to move, and the top cover plates with their abutting forehead sides as well as the lower cover plates with the stationary terminal steel plates formed by magnetic forces formed by the electrolysis current butt joints.
  • the present invention ensures a highly effective encapsulation of the reduction cell by means of an improved arrangement of cover plates.
  • the plates can be easily moved by hand, which means that fewer plates are required, which in turn allows a corresponding reduction in the number of connections to be sealed.
  • the cover for the reduction cell is made of a material that withstands the working temperatures of the electrolysis without warping, bulging or other damage.
  • the slidable plates of the cover for the reduction cell can be easily moved back and forth by hand, which allows easy access for viewing and operating the cell.
  • These relatively large panels which can be easily moved by hand and which allow a reduced number of connections to be sealed, largely prevent emissions.
  • the plates are made of a material that resists the working temperatures of the cell, so that neither twisting nor bulging reduce the efficiency.
  • the reduction cell 10 comprises insulation material 12 which is inserted into a steel trough and which encases a coal trough 14.
  • the coal pan is the cathode of the reduction cell.
  • An electrical connection to the coal trough 14 is achieved by means of embedded cathode bars 16.
  • the coal pan 14 contains a bath 18 of molten metal which is formed by the reduction of alumina.
  • the molten electrolyte 20 is arranged on this metal bath 18.
  • the reduction cell 10 is provided with a large number of carbon anodes 22, which are immersed in the molten electrolyte 20.
  • the anodes 22 are suspended from anode rods 24 which are fastened to anode supports 26 by means of a clamping lock 28.
  • the clamping lock 28 ensures a good electrical connection of the anodes suspended from the anode rods to the anode carrier and also allows the height of each anode to be individually adjusted.
  • Any suitable means not shown, e.g. Screw thread, can be used for lifting and lowering the anode carrier 26 and thus the anode 22.
  • a funnel-shaped container 30 made of steel is arranged above the reduction cell 10 and fastened to rails 32 by any suitable means, which in turn are connected to a carrier 34 for fastening the funnel-shaped container 30 above the reduction cell 10.
  • the funnel-shaped container 30 is provided with a lower edge 36 designed as a supporting surface, which is arranged below the anode carrier and is rigidly attached to the container 30 or is formed integrally therewith, for reasons which will be explained in detail later.
  • the funnel-shaped container 30 is used for alumina delivery to the cell through an opening 38.
  • Channels 40 are arranged on both sides of the container opening 38 and are used to withdraw the anode gases developed during the electrolysis process.
  • the lower edge 36 which is designed as an aerofoil, is rigidly attached to the funnel-shaped container 30 and arranged under the movable anode carriers 26 in such a way that it extends over the entire area between the stationary cover plates 42.
  • the lower edge 36 which is designed as a supporting surface, is provided with numerous notched reinforcements which are penetrated by the anode rods 24.
  • rollers 46 and 46 ' On the lower edge 36, which is also made of steel, between the anode rods 24, there are pairs of rollers 46 and 46 ', one roller being in a plane above the lower edge and the other roller being in a plane below the lower edge.
  • the axes of the pairs of rollers lie in a plane approximately perpendicular to the lower edge 36.
  • FIG steel profile 48 which extends the entire length of the cell and comprises an inner rail 50 and an outer rail 52.
  • Four steel plates 54, 56, 58 and 60 are arranged on each long side of the cell.
  • Two of the plates, 54 and 60 are provided on their underside with a pair of grooved rollers 62 which are fastened to the plates 54 and 60 by means of electrically insulating supports 63 and are adapted in such a way that they can roll on the inner rail 50 of the profile 48 .
  • an aluminum angle profile 64 is fastened to the upper end of the steel plates 54 and 60, which is designed in such a way that it is fastened to the lower rollers 46 ', which are fastened to the lower edge 36 of the funnel-shaped container 30, which is designed as a supporting surface, can slide.
  • the steel plates 56 and 58 are, as described in relation to the plates 54 and 60, provided with grooved rollers 62 which are designed in such a way that they fit on the outer rail 52 of the profile 48.
  • an aluminum angle profile 66 is fastened to each upper end of the plates 56 and 58, which can be moved on the upper rollers 46 fastened to the lower edge 36 of the funnel-shaped container 30 designed as a supporting surface.
  • a handle 68 is provided on the plates 54 and 60 in the direction of the cell exterior, while two handles 68 are arranged on the plates 56 and 58.
  • the outer plate 58 is terminated with a flexible sealing material 70, e.g. Silicon rubber or a fabric made of silicon fibers.
  • the flexible seals on the outer plates 56 and 58 lie sealingly on the inner plates 54 and 60.
  • the inner plates 54 and 60 are provided with a flange component 72, on which a second flexible seal 74, which is fastened to the outer plates 56 and 58, rests.
  • the lower end angles of the plates 54, 56, 58 and 60, on which the grooving rollers 62 are fastened are provided with additional flexible sealing material 76, which is fastened on these angles and sealingly on the relevant inner and outer rails 50 and 52 of the profile 48 rests.
  • the present invention provides a highly effective cover for an aluminum reduction cell, in which an improved arrangement of cover plates, which are easily displaceable by hand, is used. This makes it possible to use a smaller number of plates, which is expressed in a corresponding reduction in the number of seals which have to seal off the interspaces. Furthermore, the covering hood according to the invention for an aluminum reduction cell made of steel, which can withstand the working temperatures of the electrolysis process without twisting, bulging or other damage to the plates, can be produced.

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)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Laminated Bodies (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Superstructure Of Vehicle (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Fuel Cell (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Casings For Electric Apparatus (AREA)
  • Cell Separators (AREA)
EP80810122A 1979-04-23 1980-04-11 Abdeckhaube für eine Aluminiumreduktionszelle Expired EP0018326B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80810122T ATE9233T1 (de) 1979-04-23 1980-04-11 Abdeckhaube fuer eine aluminiumreduktionszelle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/032,032 US4202753A (en) 1979-04-23 1979-04-23 Reduction cell hood
US32032 1979-04-23

Publications (2)

Publication Number Publication Date
EP0018326A1 EP0018326A1 (de) 1980-10-29
EP0018326B1 true EP0018326B1 (de) 1984-09-05

Family

ID=21862741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810122A Expired EP0018326B1 (de) 1979-04-23 1980-04-11 Abdeckhaube für eine Aluminiumreduktionszelle

Country Status (11)

Country Link
US (1) US4202753A (enrdf_load_stackoverflow)
EP (1) EP0018326B1 (enrdf_load_stackoverflow)
AT (1) ATE9233T1 (enrdf_load_stackoverflow)
BR (1) BR8002440A (enrdf_load_stackoverflow)
CA (1) CA1134778A (enrdf_load_stackoverflow)
DE (1) DE3069094D1 (enrdf_load_stackoverflow)
ES (1) ES8103200A1 (enrdf_load_stackoverflow)
GR (1) GR67733B (enrdf_load_stackoverflow)
NO (1) NO154526C (enrdf_load_stackoverflow)
YU (1) YU110580A (enrdf_load_stackoverflow)
ZA (1) ZA802281B (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394242A (en) * 1980-01-28 1983-07-19 Adnovum Ag Clamp, tool, and electrolysis cell anode mount
CH647007A5 (de) * 1981-05-20 1984-12-28 Alusuisse Anode fuer eine schmelzflusselektrolysezelle.
RU2224052C1 (ru) * 2002-05-27 2004-02-20 Открытое акционерное общество "Всероссийский алюминиево-магниевый институт" Анодное устройство электролизера с обожженными анодами
US20040000491A1 (en) * 2002-06-28 2004-01-01 Applied Materials, Inc. Electroplating cell with copper acid correction module for substrate interconnect formation
US20040026255A1 (en) * 2002-08-06 2004-02-12 Applied Materials, Inc Insoluble anode loop in copper electrodeposition cell for interconnect formation
FR2879582B1 (fr) * 2004-12-21 2007-01-19 Ecl Soc Par Actions Simplifiee Dispositif de manutention des capots d'une cellule de production d'aluminium par electrolyse
NO328467B1 (no) * 2005-12-09 2010-02-22 Norsk Hydro As Fremgangsmate og anordning for innkapsling av en elektrolysecelle
FR3012473A1 (fr) * 2013-10-30 2015-05-01 Rio Tinto Alcan Int Ltd Dispositif d'etancheite pour capot de cellule d'electrolyse
EP3221495B1 (en) * 2014-11-21 2020-11-11 Hatch Ltd. Low-profile aluminum cell potshell and method for increasing the production capacity of an aluminum cell potline
CN112176365B (zh) * 2020-09-15 2023-06-23 包秀锋 一种用于冶金行业的新型工程塑料阳极罩以及阳极架
EP4174216A1 (en) * 2021-10-27 2023-05-03 Dubai Aluminium PJSC Protection device for anodes of an electrolytic cell, comprising movable panels, and its implementation method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU134429A1 (ru) * 1960-04-18 1960-11-30 Г.Г. Величко Укрытие дл алюминиевых электролизеров
CH568403A5 (enrdf_load_stackoverflow) * 1971-11-18 1975-10-31 Alusuisse
SU393361A1 (enrdf_load_stackoverflow) * 1972-01-10 1973-08-10 Иркутский алюминиевый завод
DE2263348A1 (de) * 1972-12-23 1974-07-04 Siemag Translift Gmbh Anlage zur zerlegung des aluminiumoxyds in der schmelzflusselektrolyse
DE2330557B2 (de) * 1973-06-15 1976-09-16 Wolgogradskij Aljuminiewyj Sawod, Wolgograd (Sowjetunion) Abdeckung einer elektrolysezelle mit vorgebrannten elektroden fuer die gewinnung von aluminium
AT329892B (de) * 1973-09-28 1976-06-10 Vmw Ranshofen Berndorf Ag Aluminium-elektrolysezelle mit abdeckung und gasabsaugvorrichtung
DE2510400C2 (de) * 1975-03-10 1985-08-08 Schweizerische Aluminium Ag, Chippis Schmelzflußelektrolysezelle
US4136003A (en) * 1975-03-10 1979-01-23 Swiss Aluminum Ltd. Cell for fused-salt electrolysis with gas collecting means
US3948749A (en) * 1975-04-02 1976-04-06 Copperloy Corporation Aluminum potline shield
US4002551A (en) * 1975-04-17 1977-01-11 Aluminium Pechiney Process and apparatus for collecting the fumes given off during the production of aluminium in an electrolysis cell with a continuous anode
US4043892A (en) * 1975-12-15 1977-08-23 Reynolds Metals Company Aluminum reduction cell having a lateral enclosure system

Also Published As

Publication number Publication date
CA1134778A (en) 1982-11-02
EP0018326A1 (de) 1980-10-29
BR8002440A (pt) 1980-12-02
GR67733B (enrdf_load_stackoverflow) 1981-09-16
NO154526B (no) 1986-06-30
US4202753A (en) 1980-05-13
NO154526C (no) 1986-10-08
ES489499A0 (es) 1981-02-16
ATE9233T1 (de) 1984-09-15
ES8103200A1 (es) 1981-02-16
ZA802281B (en) 1981-05-27
YU110580A (en) 1983-02-28
NO801140L (no) 1980-10-24
DE3069094D1 (en) 1984-10-11

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