EP2014800B1 - Vorrichtung zum Strippen von Kathoden - Google Patents

Vorrichtung zum Strippen von Kathoden Download PDF

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Publication number
EP2014800B1
EP2014800B1 EP07112320A EP07112320A EP2014800B1 EP 2014800 B1 EP2014800 B1 EP 2014800B1 EP 07112320 A EP07112320 A EP 07112320A EP 07112320 A EP07112320 A EP 07112320A EP 2014800 B1 EP2014800 B1 EP 2014800B1
Authority
EP
European Patent Office
Prior art keywords
cathode
pair
tools
chisels
detaching
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.)
Not-in-force
Application number
EP07112320A
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English (en)
French (fr)
Other versions
EP2014800A1 (de
Inventor
Frédéric Parasch
Alain Caufriez
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 to ES07112320T priority Critical patent/ES2351669T3/es
Priority to AT07112320T priority patent/ATE485405T1/de
Priority to EP07112320A priority patent/EP2014800B1/de
Priority to PL07112320T priority patent/PL2014800T3/pl
Priority to DE602007009961T priority patent/DE602007009961D1/de
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Priority to CNU2007201768396U priority patent/CN201132859Y/zh
Priority to CN2008101305533A priority patent/CN101343759B/zh
Publication of EP2014800A1 publication Critical patent/EP2014800A1/de
Application granted granted Critical
Publication of EP2014800B1 publication Critical patent/EP2014800B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/06—Operating or servicing
    • C25C7/08—Separating of deposited metals from the cathode

Definitions

  • the present invention generally relates to the hydrometallurgical production of metals such as zinc, and more particularly to a cathode stripping device for harvesting metal foils deposited on these cathodes.
  • This last stage of electrowinning of zinc (in English “electrowinning”, abbreviated “EW”) thus consists in carrying out the electrolysis of the purified solution of zinc in electrolysis cells by passage of a direct current between anodes and cathodes. This process makes it possible to electrolytically deposit high quality metallic zinc (purity of the order of 99.99%) on the cathodes.
  • a cathode typically consists of an aluminum plate disposed vertically in the electrolysis cell. This plate is provided on its upper edge with a bar of a width greater than the width of the plate, which serves as a support, electrical terminal and allows its handling.
  • the vertical edges of the cathode are generally covered with an electrical insulator to prevent the deposition of zinc.
  • the metal is deposited on the exposed surfaces of the cathode, on the height immersed in the electrolysis bath.
  • the zinc metal deposit which strongly adheres to the cathode, must then be removed. This operation is conventionally performed by means of a stripping device (also stripping or tearing in English "cathode stripping machine").
  • the defoliated cathodes are returned, after cleaning, in the electrolysis cells to be recharged again with zinc.
  • the stripping operation typically comprises two successive phases. In the first, one acts on each of the faces of the cathode by means of a pair of chisels to tear / take off an upper corner of each sheet. Then, in the second phase, the zinc foil is completely torn off and separated from the cathode by means of scissors which extend over the entire width of the cathode.
  • the latter are precisely adjusted so as to be as close as possible to the surface of the cathode to be able to fit under the metal deposit, however, as much as possible, without touching the cathode to avoid damaging it.
  • the chisels are placed in the working position, and a vertical displacement is exerted on the cathode support, so that the chisels attack the upper corner.
  • the chisels may scratch the surface of the cathode if they are poorly positioned. Similarly, the chisels may move (deflect) if they are not sufficiently maintained, including getting closer, tightening around the cathode and scraping its surface. These damage to the cathode are harmful and lead to premature degradation of the cathode, further compromising the quality of subsequent metal deposits.
  • the object of the present invention is to provide a cathode stripping device which minimizes the problems of cathode damage mentioned above.
  • this object is achieved by a cathode stripping device according to claim 1.
  • the present device comprises a pair of abutments associated with said pair of tear-off tools, each of the abutments being associated with a respective tear-off tool of displacement thereof, the abutments being positioned and dimensioned so as to be in contact with each other in the working position of the pulling tools, thus preventing a bringing together of the pulling tools.
  • the tearing tools are close to the cathode, each of its respective face.
  • the pulling tools are thus close together, enclosing the cathode for at least partial tearing of the metal deposit when relative movement between the tools and the cathode is performed.
  • the abutments also get closer and come into contact, thus leaving a certain spacing between the pulling tools: the pulling tools are in their working position.
  • the stops being in contact it is not possible to bring the pulling tools closer because they are integral with them. The stops therefore guarantee a minimum separation of the pulling tools.
  • the tearing tools may be chisels for punctually attacking the upper edge of the metal deposit on each of the faces of the cathode, or scissors extending over the entire width of the cathode to completely tear off the sheets previously partially peeled off by the chisels .
  • chisels and scissors are typically movable around the cathode and they are put in working position just before stripping.
  • chisels In practice, the positioning of chisels is the most critical because they are placed a few tenths of millimeters from the surface of the cathode. We will therefore usually associate at least one pair of stops with the chisels.
  • the pulling tools are pivotally mounted on both sides of the cathode.
  • the setting in working position of the chisels therefore typically consists in rotating them to grip the cathode, which causes a reconciliation of chisel heads.
  • the stops can then be fixed to the same rotary shaft as the chisels, and designed to come into contact after a rotation corresponding to the setting work position chisels.
  • the actuating means of the pair of tearing tools may comprise a linear actuator mounted to rotate the pair of tools pulling between the unobstructed and working positions.
  • stops can also be used in the case where they are displaced axially, for example.
  • the general principle is that the abutments are linked in displacement to the pulling tools, and they meet, next to the cathode, when pulling tools are brought together to act on the cathode.
  • the point at which the stops meet must correspond to the operating position of the pulling tools with which they are associated.
  • each chisel comprises a tool holder fixed on the pivoting support, and a sharp tool mounted on this tool holder.
  • the spacing between the chisel heads by changing the tool holder / tool assembly, mounted on the pivoting support.
  • the stop point in rotation of the chisels being defined by the stops, the gap between the chisels is fixed for a given set of chisels.
  • a removable chisel structure allows to interchange them to work with different gaps. An alternative would be to inter-change the stops.
  • the tearing of the metal deposits is done by moving the cathode relative to the pulling tools, the latter being in their fixed working positions.
  • the device advantageously comprises a linear traction system of the sheet in the vertical direction and upwards.
  • the Fig.1 illustrates an overview of a preferred embodiment of the present cathode stripping device.
  • the device 10 comprises a structure 12 forming a rectangular frame which comprises cathode support means to be stripped as well as tearing tools to remove the metal deposits of the two faces of the cathode and thus remove the latter.
  • the device 10 is typically traversed by a conveyor, for example of the chain type.
  • a conveyor for example of the chain type.
  • the cathodes are generally stored with a given inter-cathode spacing, which corresponds to the inter-cathode space in the electrolysis cell.
  • Such a storage greatly simplifies the handling of the cathodes because they can be collected en bloc in the electrolysis cells and repositioned in block with the appropriate spacing.
  • the cathode support means are advantageously designed to allow the removal, on the conveyor, of a cathode to be stripped, and its removal on the conveyor after treatment.
  • the cathode support means generally indicated 14, here comprise a frame consisting of a transverse bar 18 and two vertical uprights 20 (only one shown) equipped at their respective lower end with a housing 22 adapted to receive, suspension, the ends of the head bar 24 of the cathode 26.
  • conventionally used cathodes 26 consist of an aluminum plate 28, which is provided on its upper edge of a head bar 24 with a width greater than the width of the plate 28, this head bar 24 serving as a support, an electrical terminal and for its manipulation.
  • the vertical edges of the cathode plate 28 are generally covered with an insulator electric (not shown) to prevent zinc deposition.
  • the 30 chisels are arranged on either side of the cathode 26 so as to attack each an upper edge of the metal deposit.
  • the chisels are in the so-called working position: they are positioned on either side of the cathode 26 just above the upper edge of the metal deposit 29.
  • they are preferably arranged very close to the cathode 26, to a few tenths of a millimeter from its surface, so as not to touch the cathode but to attack the deposit as close as possible to the interface plate 28 - metal deposit 29.
  • there is therefore a predefined spacing between each chisel 30 and the cathode 26 (generally the same on both sides), which therefore corresponds to a predefined spacing between the two chisels 30.
  • An actuating means is provided for moving the chisels between the working position as illustrated in FIGS. Figs. 2 and 3 , and a disengaged position (not shown) in which the chisels 30 are out of range of the cathode 26 and can not attack the metal deposits 29 or the cathode plate 28.
  • each chisel 30 is pivotally mounted around a respective rotary shaft 34, horizontal and parallel to the plane of the cathode 26.
  • the actuating means comprises a linear actuator 36, e.g. of the mechanical jack type, electrical or hydraulic, associated with each chisel 30.
  • the rod 38 of each actuator 36 is coupled to the shaft 34 of the respective chisel 30 by means of a crank 40, so that the elongation where the narrowing of the actuator rod 38 causes rotation of the respective shaft 30 in one direction or the other and thus associated chisel.
  • the actuator rod 38 has an articulated end portion which follows the curved path of the crank, completed by an articulated mounting of the actuator body.
  • the chisels 30 actually attack the metal deposit 29 in the configuration of the Figs.2 and 3 there must be a relative movement between the chisels 30 and the cathode 26.
  • This relative movement is preferably obtained by moving the cathode 26 upwards, the tearing tools remaining fixed.
  • the transverse bar 18 of the cathode support 14 is securely fixed to a vertical traction mechanism 42 comprising a jack 44 and a system of pulleys 46 and counterweight 48.
  • the controlled displacement of the cathode 26 upwards makes it possible to take off / tear off, on one or more centimeters, the metal deposit 29 of the plate 28.
  • the device 10 comprises a pair of stops 50, each of the stops 50 being associated with each respective chisel 30.
  • the abutments 50 are integral in displacement, here in rotation, their respective abutment 30, and are dimensioned so as to be in contact with one another in the working position of the chisels 30, as is the case on the Figs. 2 and 3 .
  • the stops 50 are firmly fixed to the rotary shaft 34 of the chisels 30 and extend perpendicular to them. In the direction of rotation of each shaft 34 corresponding to the approach of the chisels 30, to bring them into the working position, the rotation is automatically blocked once the stops 50 in contact.
  • the ends of the abutments that meet have a suitable shape.
  • the abutments 50 are advantageously placed to meet in the vicinity of the cathode, near the action zone of the chisels (see FIG. Fig.2 ).
  • the contact zone of each stop 50 is at a distance between the rotary shaft and the contact point substantially corresponding to the distance between the rotary shaft and the sharp tool 56 of the corresponding chisel 30.
  • the stops 50 are therefore useful for controlling the positioning of the chisels 30 in the working configuration, and ensure a minimum separation between the chisels 30, respectively between the chisel holders.
  • the chisels 30 are mounted on supports 52 integral with the respective rotary shaft 34, thus forming pivoting supports.
  • the chisels 30 themselves consist of a tool holder 54 and a sharp tool 56 firmly attached to the tool holder 54.
  • each tool holder 54 is fixed on its support 52 by two screws 58 .
  • the stops 50 limit the approach of the chisels 30 by contacting them, which thus defines given radial positions for the chisel supports 52, and also defining the spacing between the sharp tools 56 of the two chisels 30 in the working position. For a given set of chisels, the spacing between chisels in working position is constant, because determined by the contact between the two stops.
  • the subsequent stripping that is to say the complete tearing of the metal deposits of the cathode 26 is done conventionally using the knives 32, under the action of a vertical pull exerted by the mechanism 42 on the bar 18 of the cathode support 14.
  • the knives 32 extend over the entire width of the cathode plate and are slightly inclined so that they engage, when the cathode 26 is pulled upwards under the metal deposit 29 at its upper corner taken off by the chisels 30.
  • the knives 32 are attached to rotating shafts 60 so that they can be moved closer to or away from the cathode 26 via a linear actuator 62 coupled to a crank 64.
  • the knife-cathode distance is greater than for the chisels so that their positioning is less critical and less likely to damage the cathode plate 28. For this reason, in the present variant, a system of integral stops, as for chisels, is not considered necessary. However, for precise control of the spacing between knives, it is possible to associate with each one an integral abutment in displacement in the same manner as for the chisels.
  • the rotary shafts 34, respectively 60, chisels 30 and knives 32 are mounted coaxially. Furthermore, the spacing between the rotary shafts 34, 60 is such that it allows the passage of the cathode when pulled up by the traction system.
  • the skilled person can of course consider different configurations.

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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)
  • Electrolytic Production Of Metals (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Claims (10)

  1. Vorrichtung zum Abstreifen von Kathoden, enthaltend einen Träger für die zu abstreifende Kathode, welcher zwei einander gegenüberliegende mit einem metallischen Belag überzogene Seiten aufweist;
    ein Abziehwerkzeugpaar, wobei jedes Abziehwerkzeug auf einer jeweiligen Seite der vorgenannten Kathode wirken kann, um dort den metallischen Belag wenigstens teilweise abzuziehen;
    ein Betätigungsmittel des Abziehwerkzeugpaares, gestaltet um die Abziehwerkzeuge zwischen einer freien Stellung und einer Arbeitsstellung zu bewegen, in welcher sie sich beidseitig von der Kathode in einem definierten Abstand zueinander befinden;
    eine Vorrichtung, um eine Relativbewegung zwischen der Kathode und dem Abziehwerkzeugpaar zu bewirken, damit der metallische Belag wenigstens teilweise abgelöst wird, während die Abziehwerkzeuge in Arbeitsstellung sind;
    gekennzeichnet durch
    ein Anschlagspaar, wobei jeder Anschlag einem jeweiligen Abziehwerkzeug des vorgenannten Paares zugeordnet und mit diesem gleichgängig ist, wobei die Anschläge derart positionniert und dimensioniert sind, dass sie in Arbeitsstellung der Abziehwerkzeuge - den vorbestimmten Abstand zwischen dem Abziehwerkzeugpaar definierend - miteinander im Kontakt sind.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Abziehwerkzeuge Stichel sind, die für ein punktförmiges Ansetzen auf den oberen Rand des metallischen Belags an jeder Seite der Cathode gestaltet sind
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Abziehwerkzeuge Meißel sind, die sich über die ganze Breite der Kathode erstrecken.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Abziehwerkzeuge Stichel sind und die vorgenannten Anschläge den genannten Sticheln zugeordnet sind; und dass die Vorrichtung außerdem ein Meißelpaar aufweist.
  5. Vorrichtung nach einem der vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass die Abziehwerkzeuge drehbar montiert sind.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der jedem Werkzeug zugeordnete Anschlag an derselben drehbaren Welle wie dieses befestigt ist
  7. Vorrichtung nach einem der vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass die Abziehwerkzeuge einzeln auf je einem drehbaren Träger montiert sind
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass jeder Stichel einen auf dem vorgenannten drehbaren Träger befestigten Werkzeugträger und ein scharfes auf dem Werkzeugträger montiertes Werkzeug umfasst
  9. Vorrichtung nach einem der vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass das Mittel zur Betätigung des Abziehwerkzeugpaares einen zum Drehen des Abziehwerkzeugpaares zwischen der freien Stellung und der Arbeitsstellung montierten linearen Aktor aufweist.
  10. Vorrichtung nach einem der vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass die genannte Vorrichtung zum Bewirken einer Relativbewegung zwischen der Kathode und dem Abziehwerkzeugpaar ein lineares Zugsystem in vertikaler Richtung und nach oben für das Blatt umfasst.
EP07112320A 2007-07-12 2007-07-12 Vorrichtung zum Strippen von Kathoden Not-in-force EP2014800B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT07112320T ATE485405T1 (de) 2007-07-12 2007-07-12 Vorrichtung zum strippen von kathoden
EP07112320A EP2014800B1 (de) 2007-07-12 2007-07-12 Vorrichtung zum Strippen von Kathoden
PL07112320T PL2014800T3 (pl) 2007-07-12 2007-07-12 Urządzenie do odrywania cynku z katod
DE602007009961T DE602007009961D1 (de) 2007-07-12 2007-07-12 Vorrichtung zum Strippen von Kathoden
ES07112320T ES2351669T3 (es) 2007-07-12 2007-07-12 Dispositivo de deshojado de cátodos.
CNU2007201768396U CN201132859Y (zh) 2007-07-12 2007-09-20 阴极剥离装置
CN2008101305533A CN101343759B (zh) 2007-07-12 2008-07-07 阴极剥离装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07112320A EP2014800B1 (de) 2007-07-12 2007-07-12 Vorrichtung zum Strippen von Kathoden

Publications (2)

Publication Number Publication Date
EP2014800A1 EP2014800A1 (de) 2009-01-14
EP2014800B1 true EP2014800B1 (de) 2010-10-20

Family

ID=38664926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07112320A Not-in-force EP2014800B1 (de) 2007-07-12 2007-07-12 Vorrichtung zum Strippen von Kathoden

Country Status (6)

Country Link
EP (1) EP2014800B1 (de)
CN (2) CN201132859Y (de)
AT (1) ATE485405T1 (de)
DE (1) DE602007009961D1 (de)
ES (1) ES2351669T3 (de)
PL (1) PL2014800T3 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2014800T3 (pl) * 2007-07-12 2011-07-29 Wurth Paul Sa Urządzenie do odrywania cynku z katod
CN102051643B (zh) * 2011-01-13 2013-04-03 三门三友冶化技术开发有限公司 永久阴极剥片机组的分离装置
CN105483759B (zh) * 2014-09-18 2018-01-12 有研亿金新材料有限公司 高温金属产品的刮除及收集装置
CN106222705B (zh) * 2016-08-31 2018-06-19 三门三友科技股份有限公司 一种阴极锌板的剥离装置
CN109735875A (zh) * 2019-01-28 2019-05-10 铜陵有色金属集团股份有限公司金冠铜业分公司 剥片机
CN110565122A (zh) * 2019-10-08 2019-12-13 江苏丹源环保科技有限公司 一种不易伤板的电解极板剥离机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU472548B2 (en) * 1972-10-27 1976-05-27 Dowa Mining Co. Ltd. An automatic apparatus for stripping deposited metal froma cathode plate in electrowinning process
JPS5665992A (en) * 1979-10-30 1981-06-04 Mitsui Mining & Smelting Co Ltd Exfoliating method and device of electrodeposited metallic plate
CA1214432A (en) * 1983-02-14 1986-11-25 George H. Reeves Method and apparatus for stripping cathodes
FI76382C (fi) * 1986-10-03 1988-10-10 Outokumpu Oy Foerfarande och anordning foer loesgoering av en elektrolytisk avlagrad utfaellning.
PL2014800T3 (pl) * 2007-07-12 2011-07-29 Wurth Paul Sa Urządzenie do odrywania cynku z katod

Also Published As

Publication number Publication date
PL2014800T3 (pl) 2011-07-29
ES2351669T3 (es) 2011-02-09
CN101343759A (zh) 2009-01-14
ATE485405T1 (de) 2010-11-15
CN201132859Y (zh) 2008-10-15
CN101343759B (zh) 2011-05-04
DE602007009961D1 (de) 2010-12-02
EP2014800A1 (de) 2009-01-14

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