EP0150680A2 - Procédé de fixation de blocs d'anode à une suspension d'anode - Google Patents

Procédé de fixation de blocs d'anode à une suspension d'anode Download PDF

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Publication number
EP0150680A2
EP0150680A2 EP84810657A EP84810657A EP0150680A2 EP 0150680 A2 EP0150680 A2 EP 0150680A2 EP 84810657 A EP84810657 A EP 84810657A EP 84810657 A EP84810657 A EP 84810657A EP 0150680 A2 EP0150680 A2 EP 0150680A2
Authority
EP
European Patent Office
Prior art keywords
anode
adhesive
spade
suspension
blocks
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.)
Withdrawn
Application number
EP84810657A
Other languages
German (de)
English (en)
Other versions
EP0150680A3 (fr
Inventor
Hans Friedli
Edwin Gut
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
Alusuisse Holdings AG
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 Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Publication of EP0150680A2 publication Critical patent/EP0150680A2/fr
Publication of EP0150680A3 publication Critical patent/EP0150680A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • C25C3/12—Anodes
    • C25C3/125—Anodes based on carbon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/22—Nonparticulate element embedded or inlaid in substrate and visible

Definitions

  • the invention relates to a method for attaching anode blocks made of carbon, which are used for the production of aluminum by means of melt flow electrolysis, to the iron spigot or spade of an anode suspension with a mechanically strong, at least at temperatures between 900 and 1000 ° C, good electrical conductivity Adhesive.
  • EP-A 27 534 describes a carbon-containing contact compound for forming an electrically highly conductive connection of high strength between elements having higher temperatures.
  • the cold-processable mass consists of a mixture of epoxy resin and tar as a binder and graphite and metal powder as solids. Before use, the mass is an acid-free hardener, e.g. a polyamine added.
  • the electrical and thermal conductivity of this contact mass corresponds to the conductivity of carbon stones and is also suitable, for example, for connecting anode bodies to the anode suspension.
  • the inventors have set themselves the task of attaching carbon anode blocks to the iron spigot or spade of the anode suspension by means of adhesive to improve the viscosity and the form-filling capacity of the adhesive without initiating premature curing.
  • a reject rate of practically zero with respect to the secure fastening is to be achieved on the one hand, and a value less than 50 ⁇ with respect to the transition resistance from the pin or spade to the anode body.
  • the casting and welding equipment necessary to cast in the pins or spades can be dispensed with.
  • a reject rate of zero has been reached in operation of several thousand anode blocks previously glued using the method according to the invention.
  • transition resistances between 32 and 48 ⁇ have been measured at anodes, thus also achieving the goal of a transition resistance for the electrical direct current which is below 50 ⁇ , which has an advantageous effect on the production costs.
  • the preheating temperature of the pins or spades and / or at least the area of the pin or spade holes of the anode bodies has to be optimized, but also their geometry.
  • tenons or spades and tenon or spade holes are dimensioned in such a way that two to three kilograms of the adhesive are filled into a hole.
  • Adhesives made from a mixture of solids, a binder and a hardener have proven themselves in practice.
  • the contact materials described in EP-A 27 534 are preferably used.
  • These adhesives consist of a mixture of graphite and metal powder as solids, epoxy resin and tar as a binder and an acid-free hardener.
  • a mixture of 65-84% by weight solids, 15-30% by weight binder and 1-5% by weight hardener has proven to be particularly advantageous.
  • iron, copper or aluminum and their alloys are suitable as the metal component of the solid component - important for the low electrical resistance.
  • the grain size of the metal should not exceed 1 mm. Chip-like grain shapes have proven to be particularly suitable.
  • a frequency in the range of 30-100 Hz is preferably used for the vibration.
  • a conventional horizontal vibrating table has proven itself, on which the anode blocks are directed before the anode rods are inserted.
  • Electric external vibrators with centrifugal disks for example, rotate at a frequency of 50 Hz and, with a mass of 12 kg, reach a centrifugal force of 4200 N.
  • a wedge or mandrel is preferably punched or pressed between a side wall of the pin or spade hole and the pin or spade to stabilize the anode rods.
  • Known pneumatic or hydraulic devices are particularly suitable for this.
  • the thinning is done in particular with round aluminum or iron cylinders that are bent on both sides. Due to the clamping force developed during distribution or thinning, the anode bodies are attached to the anode suspension in such a stable manner that they can be hung up and brought to rest before the adhesive hardens, immediately after the fastening process has ended.
  • an aluminum collar can expediently be placed around the protruding spigots or spades and the interior can be filled with a carbon-containing mass that calculates during aluminum electrolysis. This protects the tenons and spades from corrosion.
  • anode suspension 10 which is designed as an anode rod and has preheated spades 12. It is suspended from a holding device (not shown) and can be lowered into the two directed anode blocks 14, each with two recessed spade holes 16.
  • the adhesive 18, consisting of solids, binder and hardener, has been filled into the spade holes 16 beforehand.
  • the anode body 14 standing on a vibrating table 20 connected to not shown electric - is fitted outside vibrators.
  • the anode rod 10 is lowered until it rests on the resting adhesive 18.
  • the electric external vibrators are switched on, which set the vibrating table 20 and thus the anode body 14 in a corresponding movement. Due to the dead weight of the anode rod 10, the spades 12 are immersed in the vibrating adhesive 18, heat them and slide downwards, as indicated by the arrows 24, until they have reached the bottom 26 of the spade holes 16. At this point in time or shortly afterwards, the vibrating movement generated by the electric external vibrators is switched off.
  • Fig. 3 it is shown how mandrels 32 are struck between the side wall 28 of the spade hole 16 and the spade.
  • the stroke movement indicated by arrow 30 is exerted by a hydraulic device.
  • spade 12 pins instead of spade 12 pins, 16 spade holes and 32 spikes can be used instead of spade holes.
  • Two anode bodies weighing approx. 500 kg are straightened on a Würger HV 8/2 vibrating table.
  • the anode blocks are preheated to a temperature between 25 and 40 ° C.
  • a holding device is used to attach an anode suspension with four iron pegs which are arranged in accordance with the anode dimensions and pin holes and which are preheated to approx. 23 ° C.
  • 2.5 kg of cold adhesive are filled into the tenon holes, the composition of which corresponds to Example 1 of EP-A 27 534.
  • the anode suspension is lowered until the four pins lie on the adhesive.
  • the centrifugal disks of 12 kg mass of the external electric vibrators are switched on and run at 50 Hz.
  • the pegs sink to the bottom of the peg holes due to the weight of the anode suspension, the adhesive is evenly distributed and fills the peg hole to the brim.
  • the adhesive is mass heated to a temperature of 25-28 ° C, whereupon the electric external vibrators are switched off again by a limit switch of known design.
  • the anode bodies fitted with the anode suspension are removed from the vibrating table and stored for two days to harden the adhesive.
  • the anode When filling in the cold adhesive, the anode blocks and their spade holes are also cold.
  • the spades of the anode rods are preheated to temperatures between 40 and 60 ° C. Just 50 seconds after immersing them in the adhesive, the temperature of this compound rose to 38-52 ° C:

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)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP84810657A 1984-01-18 1984-12-27 Procédé de fixation de blocs d'anode à une suspension d'anode Withdrawn EP0150680A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH21684 1984-01-18
CH216/84 1984-01-18

Publications (2)

Publication Number Publication Date
EP0150680A2 true EP0150680A2 (fr) 1985-08-07
EP0150680A3 EP0150680A3 (fr) 1985-08-28

Family

ID=4181917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84810657A Withdrawn EP0150680A3 (fr) 1984-01-18 1984-12-27 Procédé de fixation de blocs d'anode à une suspension d'anode

Country Status (4)

Country Link
US (1) US4574019A (fr)
EP (1) EP0150680A3 (fr)
AU (1) AU3767685A (fr)
NO (1) NO850194L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605608A1 (de) * 1986-02-21 1987-08-27 Gewerk Eisenhuette Westfalia Verfahren und einrichtung zum anbringen von kragen aus aluminiumblech od.dgl. an den aus anodenbloecken herausragenden nippeln von anodenstangen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269415A (en) * 1992-07-21 1993-12-14 Eastman Kodak Company Rack for supporting rolls of web material plus apparatus and method for assembling such a rack
US7056414B2 (en) * 1999-10-07 2006-06-06 Aisin Seiki Kabushiki Kaisha Connecting method for metal material and electric conductive plastic material and product thereby
SE531376C2 (sv) * 2006-12-15 2009-03-17 Sandvik Intellectual Property Förfarande för värmning av anodblock, jämte anordning för värmning av anodblock
EP2242976B1 (fr) * 2008-02-06 2014-08-27 Norsk Hydro ASA Électrode pour l'utilisation dans un procédé d'électrolyse pour la production de l'aluminium
CN102373485A (zh) * 2010-08-26 2012-03-14 沈阳铝镁设计研究院有限公司 上部开槽孔的阳极炭块
WO2012100340A1 (fr) * 2011-01-28 2012-08-02 UNIVERSITé LAVAL Anode et connecteur pour une cellule industrielle de hall-héroult
FR3016897B1 (fr) * 2014-01-27 2017-08-04 Rio Tinto Alcan Int Ltd Ensemble anodique et procede de fabrication associe.
AU2016218531B2 (en) 2015-02-13 2020-06-11 Norsk Hydro Asa An anode for use in an electrolysis process for production of aluminium in cells of hall-heroult type, and a method for making same
US10920329B2 (en) * 2015-03-08 2021-02-16 Université Du Québec À Chicoutimi Anode assembly for aluminum electrolysis cells and method for manufacturing anode assemblies
GB2536901A (en) * 2015-03-30 2016-10-05 Dubai Aluminium Pjsc Cathode block for electrolytic cell suitable for the Hall-Héroult process
BR112019005313B1 (pt) * 2016-09-19 2023-11-21 Elysis Limited Partnership Montagem de ânodo inerte e célula de eletrólise contendo-a

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547061A1 (de) * 1975-10-21 1977-04-28 Kaiser Preussag Aluminium Gmbh Zapfenschutz fuer kohleanoden in gekapselten aluminium-elektrolysezellen und verfahren zu seiner herstellung
GB2033806A (en) * 1978-10-11 1980-05-29 Gewerk Eisenhuette Westfalia Process of and apparatus for treating and producing anode and cathode components for use in electrolytic smelting
EP0027534A1 (fr) * 1979-10-20 1981-04-29 Sigri Elektrographit Gmbh Pâte de contact carbonée

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1719989A (en) * 1926-05-13 1929-07-09 Locke Insulator Corp Method of and apparatus for assembling insulators
US2010934A (en) * 1934-04-13 1935-08-13 Ohio Brass Co Cementing process and apparatus
US3630808A (en) * 1967-05-10 1971-12-28 Shinjiro Yasui Apparatus for joining sheet materials by vibrating plates
FR1574892A (fr) * 1968-05-22 1969-07-18
DE1937411B1 (de) * 1969-07-23 1971-09-16 Bard Martin Dipl Ing Befestigung zwischen einem anodenzapfen und einer kohlen stoffanode
FR2368129A1 (fr) * 1976-10-12 1978-05-12 Ceraver Procédé de fabrication d'Isolateurs suspendus pour lignes électriques et dispositif de mise en oeuvre
US4121994A (en) * 1977-11-17 1978-10-24 Hooker Chemicals & Plastics Corp. Anode support means for an electrolytic cell
US4357226A (en) * 1979-12-18 1982-11-02 Swiss Aluminium Ltd. Anode of dimensionally stable oxide-ceramic individual elements
DE3301178A1 (de) * 1983-01-15 1984-07-19 Rudi 7000 Stuttgart Blümle Verfahren zur herstellung einer meisterplatte und danach hergestellte meisterplatte mit in vorgegebenen koordinatenabstaenden angeordneten passbohrungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547061A1 (de) * 1975-10-21 1977-04-28 Kaiser Preussag Aluminium Gmbh Zapfenschutz fuer kohleanoden in gekapselten aluminium-elektrolysezellen und verfahren zu seiner herstellung
GB2033806A (en) * 1978-10-11 1980-05-29 Gewerk Eisenhuette Westfalia Process of and apparatus for treating and producing anode and cathode components for use in electrolytic smelting
EP0027534A1 (fr) * 1979-10-20 1981-04-29 Sigri Elektrographit Gmbh Pâte de contact carbonée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605608A1 (de) * 1986-02-21 1987-08-27 Gewerk Eisenhuette Westfalia Verfahren und einrichtung zum anbringen von kragen aus aluminiumblech od.dgl. an den aus anodenbloecken herausragenden nippeln von anodenstangen
US4803768A (en) * 1986-02-21 1989-02-14 Gewerkschaft Eisenhutte Westfalia Method of, and apparatus for, applying sheet metal collars onto the nipples of anode bars

Also Published As

Publication number Publication date
AU3767685A (en) 1985-07-25
EP0150680A3 (fr) 1985-08-28
NO850194L (no) 1985-07-19
US4574019A (en) 1986-03-04

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Inventor name: FRIEDLI, HANS

Inventor name: GUT, EDWIN