EP2102387B1 - Verfahren zum erhitzen von anodenblöcken und anordnung zum erhitzen von anodenblöcken - Google Patents

Verfahren zum erhitzen von anodenblöcken und anordnung zum erhitzen von anodenblöcken Download PDF

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Publication number
EP2102387B1
EP2102387B1 EP07852176.2A EP07852176A EP2102387B1 EP 2102387 B1 EP2102387 B1 EP 2102387B1 EP 07852176 A EP07852176 A EP 07852176A EP 2102387 B1 EP2102387 B1 EP 2102387B1
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EP
European Patent Office
Prior art keywords
caused
anode
blocks
elements
cup
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Application number
EP07852176.2A
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English (en)
French (fr)
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EP2102387A4 (de
EP2102387A1 (de
Inventor
Örjan DANIELSSON
Stefan Springmann
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.)
Sandvik Intellectual Property AB
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Sandvik Intellectual Property AB
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Publication of EP2102387A1 publication Critical patent/EP2102387A1/de
Publication of EP2102387A4 publication Critical patent/EP2102387A4/de
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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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes
    • C25C3/125—Anodes based on carbon
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/64—Heating elements specially adapted for furnaces using ribbon, rod, or wire heater

Definitions

  • the present invention relates to a method for the heating of anode blocks, and to an arrangement for the heating of anode blocks.
  • anode blocks consist of granulated graphite. Holes are present in these blocks in order to attach electrical contacts of iron, known as “yokes", by moulding.
  • the sizes of the blocks may vary, and the number of contact holes into which contacts are to be attached may also vary. There is normally between three and six holes.
  • the blocks may have different dimensions: the dimensions may, for example, be 1300 x 500 x 500 millimetre.
  • the anode blocks are exchanged at regular intervals.
  • the anode blocks are then renovated and stored until they are to be reused.
  • Water can collect in the holes in the blocks as a result of precipitation, since the blocks are often stored outdoors, to a certain extent.
  • the blocks furthermore, are also exposed to moist air. Water is sucked into the blocks, or is absorbed into the blocks, since the material of the blocks is porous.
  • the present invention thus relates to a method for heating anode blocks, which anode blocks are used in the production of aluminium and comprise contact holes into which it is arranged that electrical contacts are to be attached, and it is characterised in that the holes are caused to be heated by means of radiative heat from electrical resistive elements arranged to be used at high temperatures, in that the wire of the elements is in the form of shanks with two or more legs, in that each one of the elements is caused to be arranged in a cup with an open end surface, and in that one cup for each hole in the anode block is caused to lie in front of the hole in question.
  • the invention relates to an arrangement of the type and with the principal characteristics specified by patent claim 5.
  • Figure 1 shows an arrangement 1 for the heating of anode blocks 2, which anode blocks are used during the production of aluminium and which comprise contact holes 3 into which it is arranged that electrical contacts are to be attached.
  • the arrangement 1 comprises electrical resistive elements 4, 5, 6, shown in Figure 3 , arranged to be used at high temperatures. It is preferred to use resistive elements that are manufactured by KANTHAL AB, Sweden, and that are marketed under the name "Kanthal Super". This element can be heated in operation up to 1900 °C.
  • the wires of the elements 4-6 are formed as shanks with two or more legs. Each one of the elements 4-6 is arranged in a cylindrical cup 7, 8, 9 with an open end surface. It is preferable that the cup is cylindrical.
  • the cups 7-9 with the resistive elements 4-6 are equal in number to the number of holes 3 in the anode block 2. The cups 7-9 are placed into a holder 10 that is common for all cups such that one cup 7-9 for each hole 3 in the anode block 2 is caused to lie in front of the hole 3 in question.
  • the said elements are caused to be a high-temperature element.
  • the said cup is caused to be of a fibre insulation material comprising Al 2 O 3 and/or SiO 2 .
  • each resistive element is caused to develop a power of approximately 10-20 kW.
  • the distance between the said open end surface and the anode block is caused to exceed a couple of millimetres and to lie below a couple of centimetres.
  • This method has been shown to be able to reduce significantly the drying time for anode blocks from that required by the prior art technology.
  • the drying time is as short as approximately 4 minutes with the dimensions of the anode block given above as examples.
  • the present invention thus solves the problem described in the introduction.
  • the present invention is not by any means limited to a method or an arrangement to be used with anode blocks having three holes.
  • the invention can be used for all designs of anode block with holes.

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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)
  • Resistance Heating (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Primary Cells (AREA)

Claims (6)

  1. Verfahren zum Heizen von Anodenblöcken, wobei die Anodenblöcke (2) bei der Herstellung von Aluminium verwendet werden und Kontaktbohrungen (3) aufweisen, in welchen Vorkehrungen für die Anbringung von elektrischen Kontakten getroffen sind, dadurch gekennzeichnet, dass bewirkt wird, dass die Bohrungen mit Hilfe von Strahlungswärme von elektrischen Widerstandselementen (4, 5, 6) erhitzt werden, welche für die Verwendung bei hohen Temperaturen ausgelegt sind, dass der Draht der Elemente (4, 5, 6) in Form von Bügeln mit zwei oder mehr Schenkeln vorliegt, dass jedes der Elemente (4, 5, 6) in einem Napf (7, 8, 9) mit einer offenen Stirnfläche angeordnet ist, dass ein Napf (7, 8, 9) für jede Bohrung (3) in dem Anodenblock (2) vor der in Rede stehenden Bohrung (3) liegt, und dass bewirkt wird, dass der Napf (7, 8, 9) aus einem isolierenden Fasermaterial besteht, welches Al2O3 und/oder SiO2 aufweist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass bewirkt wird, dass die Elemente (4, 5, 6) Hochtemperaturelemente sind.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass bewirkt wird, dass jedes Widerstandselement (4, 5, 6) eine Leistung von etwa 10-20 kW entwickelt.
  4. Anordnung für das Heizen von Anodenblöcken, wobei die Anodenblöcke (2) bei der Herstellung von Aluminium verwendet werden und Kontaktbohrungen (3) aufweisen, welche so ausgelegt sind, dass elektrische Kontakte darin angebracht werden können, dadurch gekennzeichnet, dass die Anordnung aufweist, dass die elektrischen Widerstandselemente (4, 5, 6) für die Verwendung bei hoher Temperatur ausgelegt sind, dass der Draht der Elemente (4, 5, 6) in Form von Bügeln mit zwei oder mehr Schenkeln vorliegt, dass jedes der Elemente (4, 5, 6) in einem Napf (7, 8, 9) mit einer offenen Stirnfläche angeordnet ist, dass die Näpfe (7, 8, 9) mit den Widerstandselementen (4, 5, 6) gleich der Anzahl der Bohrungen (3) in dem Anodenblock (2) sind, und dass die Näpfe (3) in einem Halter (10) angeordnet sind, der für alle Näpfe derselbe ist, sodass ein Napf (7, 8, 9) für jede Bohrung (3) in dem Anodenblock (2) vor der in Rede stehenden Bohrung (3) liegt, und dass der Napf (7, 8, 9) aus einem isolierenden Fasermaterial hergestellt ist, welches Al2O3 und/oder SiO2 aufweist.
  5. Anordnung nach Anspruch 4, dadurch gekennzeichnet, dass das Element (4, 5, 6) ein Hochtemperaturelement ist.
  6. Anordnung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass jedes Widerstandselement (4, 5, 6) so ausgelegt ist, dass es eine Leistung von in etwa 10-20 kW entwickelt.
EP07852176.2A 2006-12-15 2007-11-27 Verfahren zum erhitzen von anodenblöcken und anordnung zum erhitzen von anodenblöcken Active EP2102387B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602707A SE531376C2 (sv) 2006-12-15 2006-12-15 Förfarande för värmning av anodblock, jämte anordning för värmning av anodblock
PCT/SE2007/050904 WO2008073031A1 (en) 2006-12-15 2007-11-27 Method for the heating of anode blocks, and an arrangement for the heating of anode blocks.

Publications (3)

Publication Number Publication Date
EP2102387A1 EP2102387A1 (de) 2009-09-23
EP2102387A4 EP2102387A4 (de) 2010-09-29
EP2102387B1 true EP2102387B1 (de) 2016-01-27

Family

ID=39511959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07852176.2A Active EP2102387B1 (de) 2006-12-15 2007-11-27 Verfahren zum erhitzen von anodenblöcken und anordnung zum erhitzen von anodenblöcken

Country Status (6)

Country Link
EP (1) EP2102387B1 (de)
CN (1) CN101573475B (de)
AU (1) AU2007332181B2 (de)
CA (1) CA2672507C (de)
SE (1) SE531376C2 (de)
WO (1) WO2008073031A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO333400B1 (no) * 2009-08-25 2013-05-27 Norsk Hydro As Fremgangsmate og anlegg for rensing og torking av kalsinerte elektroder
CN103103567B (zh) * 2012-09-28 2015-09-23 河南永登铝业有限公司阳城分公司 电解铝设备及其阳极碳块加热炉
CN110541175B (zh) * 2019-10-17 2021-07-06 台州衡力金属制品有限公司 一种电解铝阳极生产用加热装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE395214B (sv) * 1975-09-09 1977-08-01 Bulten Kanthal Ab Anordning vid elektriskt uppvermda motstandsugnar
DE2844222C2 (de) * 1978-10-11 1984-10-18 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Verfahren und Einrichtung zum Verbinden von Anoden mit ihren Anodenstangen
US4394566A (en) * 1979-11-27 1983-07-19 Bulten-Kanthal Aktiebolag Ladle preheater
EP0150680A3 (de) * 1984-01-18 1985-08-28 Schweizerische Aluminium AG Verfahren zum Befestigen von Anodenblöcken an einer Anodenaufhängung
WO1995006145A1 (en) * 1993-08-27 1995-03-02 Moen Asbjoern Procedure and device for electrical drying and preheating of cells for electrolysis
SE518582C2 (sv) * 2000-02-18 2002-10-29 Kanthal Ab Värmningsugn i vilken värme överförs genom strålning
JP2004139769A (ja) * 2002-10-16 2004-05-13 Aruba Japan:Kk 発熱構造体
CN2653407Y (zh) * 2003-10-16 2004-11-03 韦力 电感应加热烘干机

Also Published As

Publication number Publication date
WO2008073031A1 (en) 2008-06-19
CN101573475B (zh) 2011-08-17
CA2672507C (en) 2015-02-24
EP2102387A4 (de) 2010-09-29
CA2672507A1 (en) 2008-06-19
SE531376C2 (sv) 2009-03-17
EP2102387A1 (de) 2009-09-23
AU2007332181B2 (en) 2010-05-20
SE0602707L (sv) 2008-06-16
AU2007332181A1 (en) 2008-06-19
CN101573475A (zh) 2009-11-04

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