EP0248452A1 - Support d'anode pour fixer fermement les corps d'anode en carbone dans les cellules électrolytiques de production d'aluminium - Google Patents

Support d'anode pour fixer fermement les corps d'anode en carbone dans les cellules électrolytiques de production d'aluminium Download PDF

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Publication number
EP0248452A1
EP0248452A1 EP87108297A EP87108297A EP0248452A1 EP 0248452 A1 EP0248452 A1 EP 0248452A1 EP 87108297 A EP87108297 A EP 87108297A EP 87108297 A EP87108297 A EP 87108297A EP 0248452 A1 EP0248452 A1 EP 0248452A1
Authority
EP
European Patent Office
Prior art keywords
metal
anode
steel
anode hanger
box type
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.)
Granted
Application number
EP87108297A
Other languages
German (de)
English (en)
Other versions
EP0248452B1 (fr
Inventor
Paul Mikael Holmberg
Thor Georg Omli
Kai M. Vik
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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
Priority claimed from NO862261A external-priority patent/NO862261D0/no
Application filed by Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP0248452A1 publication Critical patent/EP0248452A1/fr
Application granted granted Critical
Publication of EP0248452B1 publication Critical patent/EP0248452B1/fr
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars

Definitions

  • the present invention relates to anode hangers for fixedly holding prebaked carbon anode bodies in cells for the pro­duction of aluminium by electrolysis according to the Hall-­Heroult process as described in the initial part of the present claim 1.
  • Aluminium is mostly produced by electrolysis of aluminium oxide dissolved in a cryolite bath.
  • the electrolytic cells enabling this consist of a carbon cathode which is placed in a steel container which on the inside is isolated with refractory materials.
  • a carbon anode, or several carbon anode bodies, are arranged above the carbon cathode and are partly sunk into the cryolite bath.
  • the oxygen which descends from the decomposition of the aluminium oxide will gradually oxidize the carbon anode bodies.
  • the aluminium pro­duced is therefore in a liquid state and is deposited on the carbon cathode due to gravity.
  • the aluminium produced, or part of the aluminium produced is regularly removed from the cell by means of a suction pump and transferred to a casting ladle, and is in turn decanted to a foundry stove.
  • the carbon parts of the electrolytic apperatures are working at temperatures close to the temperature of the cryolite bath.
  • the connections between the anode and cathode and the electric conductors (bus bars) are therefore made of inter­mdiate parts which are resistant to the high temperatures. These intermediate parts are usually made of steel.
  • the anode hanger In the electric current connection between the bus bar and the anode carbon body, the anode hanger, only the lower part is made of steel, while the upper part of the hanger is made of metal. This due to the fact that steel has poor electrical conductivity compared to aluminium or copper (metal.
  • the electric current has the shortest possible path through the steel part of the anode hanger so that the ohmic resistance is at a minimum.
  • a suf­ficient amount of steel has to be used so that the tempera­ture in the metal part of the anode hanger does not get too high. Such too high temperature may result in that the metal melts or the connection between the steel and the metal be­comes loose.
  • connection between the steel and metal part of the anode hanger according to the present invention has: - improved mechanical properties (mechanically stronger) - improved electrical conductivity (lower ohmic resistance) - a shorter electrical current path - lower maintenance costs, and - is cheacper to producer.
  • FIG. 1-4 show four different examples of an anode hanger according to the invention.
  • FIG. 1 there is shown an anode hanger onto which is fixedly mounted a carbon anode body.
  • the anode hanger 1 consists of an upper part 3 which is made of metal, the anode hanger rod, and a lower part 4 made of steel.
  • the lower steel part 4 of the anode hanger comprises a cross bar 7 which has four downwardly extending nipples 5.
  • the carbon body is affixed to the nipples 5 by means of a connecting piece which may be cast iron, carbon paste, or some kind of dry packing.
  • the metal part is connected to the steel part of the anode hanger by casting the metal 3 around the upper part of the steel cross bar 7.
  • the manufacturing of the anode hanger according to Fig. 1 consists in making a steel part 4 which has a cross bar 7 in which is drilled several holes 6.
  • the steel part is cleaned, e.g. my means of sand-blasting, and is thereafter, electro­lytically or by other means, metallized with a metal having good electric conductivity, such as silver or copper.
  • a metal having good electric conductivity such as silver or copper.
  • the steel cross bar 7 is then, with its nipples protruding upwards, mounted on top of a mould which is made on before­hand. After the steel bar 7 is placed in the right position, the liquid metal melt is poured into the mould until it reaches a level where the cross bar is wholly or partly covered with metal.
  • the metal flows into the holes 6 where it solidifies. Due to the fact that the metal has a co-efficient of thermal expansion which is larger than that of steel, the metal will shrink around the steel and thereby make a firm mechanical connection, as well as an improved electrical connection between the metal and steel part of the anode hanger.
  • a hole 9 is drilled through the steel and metal part of the hanger, slightly above the steel cross bar 7.
  • the hole 9 serves as a grip for a lifting/holding device in connection with the transportation of the hanger, removing of anode butts etc. This will reduce the mechanical strain/wear of the connection between the metal and steel part of the hanger.
  • the steel cross bar consists of a hollow box type construction 10.
  • the box type construction 10 may preferably be made of a structural steel bar and is on the top side provided with a hole for the anode hanger rod 11, and on the bottom side provided with holes for the steel nipples 12.
  • the lower end of the metal rod 11 and the upper end of the nipples 12 extend through said holes and into the hollow box type construction 10.
  • the rod 11 is arranged with clearance relative to the hole on the top side of the box construction 10, while the nipples preferably are welded to the edges of the respective holes with a welding seam 14 on the outside and/or a welding seam on the inside of said box construction.
  • the casting itself may be performed by poruing metal melt through a holde (not shown) on top of the box construction 10.
  • the metal melt may be superheated (for aluminium about 750°C).
  • the end of the metal anode rod 11 which is embedded in the cast metal 26 inside the box construction is partly melted together with said metal 26. This will strengthen the connection between the anode rod 11 and cast metal 26, and will reduce the ohmic resistance.
  • Fig. 3 shows an anode hanger which principally is of the same construction as the one described above and shown in Fig. 2. Due to the fact that the electrical conductivity between the metal and steel part of the anode hanger is improved and the electric current path in the steel part is reduced, the hanger is provided with two anode carbon bodies, Thus, in­stead of three nipples the anode hanger is provided with six nipples 12.
  • the anode hanger is therefore provided with brackets 17 on each side of the anode rod 20, on the top side of the cross bar 18.
  • the brackets are on one side welded to the cross bar 18, and on the other side welded to a vertical box type construction 19 which is arranged around the anode rod 20.
  • Double anode hangers of this kind contribute to reduce the manufacturing and maintenance costs for the anode hangers.
  • Fig. 4 reveals a fourth example of an anode hanger according to the invention.
  • This anode hanger is partly built up of constructional elements shown in the examples of Figs. 2 and 3, as the nipple ends are embedded in a box type construction and the anode hanger is provided with two carbon anode bodies.
  • the difference consists, however, in that the elec­tric current is suppled directly to the cast metal 26 through flexible conductors 24, and that the anode hanger rod is made of a non-conducting steel bar 21.
  • the ends of these may be embedded in the cast metal 26, or connected to the metal 26 by means of a mechanical connection (not shown).
  • Fig. 4 shows an anode hanger provided with six nipples (two anodes), the invention is not limited to only this embodiment.
  • the anode hanger may be provided with more than six nipples (more than two anodes).
  • the present invention relates to an anode hanger where the electric current path in the steel part of the hanger is essentially reduced (in the example shown in Fig. 4 also the metal part).
  • the radiant heat and the heat conducted through the nipples from the electrolytic bath, represent a delimitation to this current path.
  • the nipples will thus have to be made sufficiently long so that the metal in the anode hanger does not melt.
  • the metal part of the anode hanger may be provided with some kind of cooling device, such as cooling fins or the like.

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)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
EP19870108297 1986-06-06 1987-06-09 Support d'anode pour fixer fermement les corps d'anode en carbone dans les cellules électrolytiques de production d'aluminium Expired EP0248452B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO862261 1986-06-06
NO862261A NO862261D0 (no) 1986-06-06 1986-06-06 Anodehenger for fastholdelse av karbonholdig anode i celler for fremstilling av aluminium.
NO871133A NO162083C (no) 1986-06-06 1987-03-19 Anodehenger for fastholdelse av karbonholdig anode i celler for fremstilling av aluminium.
NO871133 1987-03-19

Publications (2)

Publication Number Publication Date
EP0248452A1 true EP0248452A1 (fr) 1987-12-09
EP0248452B1 EP0248452B1 (fr) 1991-01-23

Family

ID=26647960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870108297 Expired EP0248452B1 (fr) 1986-06-06 1987-06-09 Support d'anode pour fixer fermement les corps d'anode en carbone dans les cellules électrolytiques de production d'aluminium

Country Status (5)

Country Link
EP (1) EP0248452B1 (fr)
AU (1) AU7402487A (fr)
BR (1) BR8702881A (fr)
DE (1) DE3767567D1 (fr)
NO (1) NO162083C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100404728C (zh) * 2005-06-05 2008-07-23 张进一 钢铝圆锥面压紧连接法阳极生产工艺
CN102108525A (zh) * 2011-04-11 2011-06-29 商丘市鑫科节能技术服务有限公司 电解铝阳极免浇注连接方法
CN103834968A (zh) * 2012-11-28 2014-06-04 沈阳铝镁设计研究院有限公司 铝电解槽用阳极炭块组
WO2019123131A1 (fr) * 2017-12-18 2019-06-27 Dubai Aluminium Pjsc Support d'anode, dispositif de suspension d'anode et ensemble d'anode destinés à une cellule hall-héroult
CN114516534A (zh) * 2022-04-21 2022-05-20 山东德晟机器人股份有限公司 一种机器人自动化炭块填料系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208207A1 (de) * 1992-03-14 1993-09-16 Westfalia Becorit Ind Tech Einrichtung zum ausrichten der anodenstangen gegenueber den anodenbloecken in einer ausricht- und giessstation
CN104131313B (zh) * 2014-07-09 2016-06-15 江苏苏菱铝用阳极有限公司 碳素阳极块生坯积水自动吹除装置
NO341533B1 (no) * 2014-12-30 2017-12-04 Storvik As Anodeåk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU606901A1 (ru) * 1976-11-01 1978-05-15 Всесоюзный научно-исследовательский и проектный институт алюминиевой, магниевой и электродной промышленности Обожженный анод электролизера дл получени алюмини
SU1008283A1 (ru) * 1981-11-02 1983-03-30 Всесоюзный Научно-Исследовательский И Проектный Институт Алюминиевой,Магниевой И Электродной Промышленности Держатель угольных электродов
GB2159538A (en) * 1984-05-29 1985-12-04 Pechiney Aluminium A carbonaceous anode with partially constricted round bars designed for cells for the production of aluminium by electrolysis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU606901A1 (ru) * 1976-11-01 1978-05-15 Всесоюзный научно-исследовательский и проектный институт алюминиевой, магниевой и электродной промышленности Обожженный анод электролизера дл получени алюмини
SU1008283A1 (ru) * 1981-11-02 1983-03-30 Всесоюзный Научно-Исследовательский И Проектный Институт Алюминиевой,Магниевой И Электродной Промышленности Держатель угольных электродов
GB2159538A (en) * 1984-05-29 1985-12-04 Pechiney Aluminium A carbonaceous anode with partially constricted round bars designed for cells for the production of aluminium by electrolysis

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100404728C (zh) * 2005-06-05 2008-07-23 张进一 钢铝圆锥面压紧连接法阳极生产工艺
CN102108525A (zh) * 2011-04-11 2011-06-29 商丘市鑫科节能技术服务有限公司 电解铝阳极免浇注连接方法
CN102108525B (zh) * 2011-04-11 2012-07-25 商丘市鑫科节能技术服务有限公司 电解铝阳极免浇注连接方法
CN103834968A (zh) * 2012-11-28 2014-06-04 沈阳铝镁设计研究院有限公司 铝电解槽用阳极炭块组
WO2019123131A1 (fr) * 2017-12-18 2019-06-27 Dubai Aluminium Pjsc Support d'anode, dispositif de suspension d'anode et ensemble d'anode destinés à une cellule hall-héroult
CN114516534A (zh) * 2022-04-21 2022-05-20 山东德晟机器人股份有限公司 一种机器人自动化炭块填料系统

Also Published As

Publication number Publication date
AU7402487A (en) 1988-06-09
NO871133D0 (no) 1987-03-19
EP0248452B1 (fr) 1991-01-23
NO162083C (no) 1989-11-01
DE3767567D1 (de) 1991-02-28
NO871133L (no) 1987-12-07
NO162083B (no) 1989-07-24
BR8702881A (pt) 1988-03-01

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