EP0767256A1 - Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden - Google Patents

Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden Download PDF

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Publication number
EP0767256A1
EP0767256A1 EP95500137A EP95500137A EP0767256A1 EP 0767256 A1 EP0767256 A1 EP 0767256A1 EP 95500137 A EP95500137 A EP 95500137A EP 95500137 A EP95500137 A EP 95500137A EP 0767256 A1 EP0767256 A1 EP 0767256A1
Authority
EP
European Patent Office
Prior art keywords
cathode
claws
bracket
cathodes
rollers
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
EP95500137A
Other languages
English (en)
French (fr)
Other versions
EP0767256B1 (de
Inventor
Francisco J. Sitges Menendez
Fernando M. Sitges Menendez
Francisco Alvarez Tamargo
Francisco Tamargo Garcia
José Mar a Quiroga Alvarez
Ives Lefevre
Carlos Gonzalez Gonzales
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.)
Asturiana de Zinc SA
Original Assignee
Asturiana de Zinc 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
Application filed by Asturiana de Zinc SA filed Critical Asturiana de Zinc SA
Priority to DE69506411T priority Critical patent/DE69506411T2/de
Priority to EP95500137A priority patent/EP0767256B1/de
Priority to AT95500137T priority patent/ATE174073T1/de
Priority to DK95500137T priority patent/DK0767256T3/da
Publication of EP0767256A1 publication Critical patent/EP0767256A1/de
Application granted granted Critical
Publication of EP0767256B1 publication Critical patent/EP0767256B1/de
Priority to GR990400620T priority patent/GR3029525T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

  • This invention refers to a facility to loosen off the layers electro-deposited upon cathodes, particularly applicable to the obtention of metals through electrolysis, such as in the obtention of copper, zinc, etc. through electrolysis.
  • the facility object of the invention is of the type that include an area of reception of cathodes coming from the electrolytic vats, a cathode treatment area and a storage area for cathodes free from the electrolytic metal layer, whereas the cathodes may be moved consecutively along the three fore mentioned areas and including the treatment area means to wash the cathodes and means to take off the electro-deposited metal layers.
  • the washing means are made of fixed water jets located at the same level as the cathodes and aimed at the space taken up by them.
  • the operation to loosen off the metal layers electro-deposited are carried out in two successive operations: the first stage consists of an operation to separate the upper edge of the electro-deposited layers from the cathode plate, whereas said plates are then totally separated in a second operation.
  • the object of this invention is a installation to effect the separation of the metal layers electro-deposited on a cathode, by way of a continuous process constituting a unique stage or operation and requiring the use of only one extraction unit.
  • the facility of the invention allows the full separation of the electro-deposited metal layers without producing damage on the cathode plate nor upon the protection of its edges.
  • the washing and extraction means are made up of a number of independent brackets, each of which limits a vertical passage sized to allow the passage of a cathode.
  • Each one of these brackets is fitted upon a gantry capable of vertical movement between a lower position in which it is placed below the lower edge of the cathode located in the corresponding station and another upper position in which the bracket embraces the cathode.
  • the washing station bracket is configured as a drawer and has the means necessary to spray pressurized water upon the cathode surface.
  • the extraction station bracket includes two sets of vertical claws that are set so that they may turn freely upon two horizontal parallel bars, each of which is set between end arms articulated by their lower end to the upper end of the bracket.
  • the extraction station does furthermore also include two rollers, each of which is mounted coaxially and is also able to turn freely on one of the fore mentioned bars, between the claws of said bar. These arms may oscillate between maximum separation and approximation positions.
  • the bracket may furthermore move vertically between a lower position, in which it is located below the lower edge of the cathode placed in the extraction unit and in a upper position in which the bracket embraces the cathode and the claws are located immediately above the upper edge of the electro-deposited metal layers.
  • the claws of the extraction means include a wedge-shaped vertical section lower area. These claws are furthermore capable of tilting between a cathode approximation position, in which the internal surface of the wedge-shaped areas is parallel to the cathode plate and a separation position, in which said internal surface comes off the cathode plate. Both the claws and the arms are actuated by way of pneumatic cylinders.
  • the internal surface of the wedge shaped area of the claws ends up close to the cathode plate without leaning thereupon, whenever the bracket is at its upper limiting position and the tilting arms towards the maximum bar approximation position and the claws tilt towards the cathode maximum approximation position.
  • the extraction means do furthermore include two upper rollers, parallel to the bars on which the claws are set, which are located above said claws. These rollers are mounted so that they are capable of turning freely between pairs of arms articulated by their lower end to the bracket.
  • the arms are connected to actuating cylinders and may tilt between two limiting positions, one of them vertical, in which the rollers end up being located outside the bracket vertical passage, and another converging one, in which said rollers end up being located towards the inside of said passage.
  • the installation shown in figure 1 to 3 includes a reception area for cathodes coming from the electrolytic vats, generally marked by the number 1, a cathode treatment area 2 and an area 3 for storage of cathodes already freed from the metal layer electro-deposited upon them.
  • the beams 4 are supported by vertical columns 9 among which runs a gangway 10 which shall be located at the height of the transit or working surface, made up of the floor surface.
  • the cathode treatment area 2 does also have cathode moving and positioning means 11, whereas said cathodes may be taken along a beam 12 located above the beams 4. Furthermore the cathode treatment area 2 includes two gantries, referenced by the numbers 13 and 14, the first one of which carries the washing means 15 whereas the second one carries the extraction means 16.
  • a conveyor belt 17 upon which shall fall, for example from a hydraulic dampening device, the electro-deposited metal layers, after having been taken off the cathodes.
  • a pushing mechanism 18 arranged upon the final belt portion, made up of a pneumatic cylinder that moves the extracted metal plates 19 upon guides 20 made up of L-shaped profiles which, upon opening up, let the plates 19 fall so that they pile up, as shown in figures 1 and 2.
  • Figure 4 shows one of the gantries 13 or 14, inside which run upwardly the beams 4 which shall support the cathode heads.
  • the footings of these gantries include guides 21 upon which to slide the washing 15 or extraction 16 means.
  • the gantries 13-14 carry a driving system 22 for the vertical movement of the washing or extraction means.
  • Figures 5 to 7 show the washing means, which are made up of a chamber 23, roughly shaped as a rectangular plan straight prism-shaped box, open at its upper end so as to enable it to receive and house a cathode.
  • the box or bracket 23 is fitted on its smaller walls with plastic wheels 24, with duly sealed ball bearings, to guide the bracket along the profiles 21 of the gantries, figure 3.
  • To this wheel mechanism are attached linear displacement elements of the driving system 22, which shall also run upon the profiles 21.
  • the washing chamber 23 has internally mounted, upon its greater walls, two lines of spraying nozzles 25, anchored so that they may change the angle of incidence of the hot water stream projected upon the cathodes introduced into the box.
  • the opening on the upper end of this box is fitted with a system of flexible closing sheets 26 that allow the entry of the cathode and prevent the exit of water from inside the chamber.
  • This closing system may be made up of a curtain made of very flexible plastic material threads.
  • Water feeding shall be effected using flexible hoses and the box shall be fitted with a steam extraction system 27 connected at its upper portion to suction slots and to a extraction system.
  • the chamber 23 is also fitted with pipes 28 to empty the cleaning water.
  • Figures 8 and 9 show the extraction means, which also include a bracket 29 defining a vertical passage sized so as to be able to move and place itself around a cathode and is externally fitted with a guiding mechanism with plastic wheels 30 of the same constitution and function as that described for the washing chamber 23.
  • each side of the bracket On the upper side of the bracket are fitted, on each side of the vertical passage, two arms 31 that tilt around a lower turning axis 32, being the turn of said axis 32 controlled by a pneumatic cylinder 33. Between the upper end of the arms 31 on each side runs a bar 34 parallel to axis 32. Upon each of the bars 34 are fitted, so that they may freely turn, two vertical claws 35 and a central coaxial roller 36, used as a separation element for the claws 35 and which side surface sticks out beyond said claws, at least on the side aimed towards the opposite roller. The claws 35 may tilt around bar 34, actuated by the hydraulic cylinders 37.
  • bracket 29 includes free turning upper roller 38, mounted upon the upper end of arms 39, figure 10, articulated at its lower end to panels 40 running between the arms 31, being the arms 39 tilt capable through the actuation of the hydraulic cylinders 41.
  • a load of cathodes held at equal separation distances using appropriate devices are brought, using, for example, a crane bridge, and are positioned upon the beams 4, in the reception area 1.
  • the first cathode is then moved using the pushing elements 5 until it is positioned in coincidence with the gantry 13.
  • Hot water feeding is then activated through the nozzles 25 of the washing chamber 23 and the chamber 23 up and down movement is then initiated, acting the sprayed water uniformly and at constant pressure upon the surfaces of the cathode during the up and down trajectory of the washing chamber upon said cathode, thus ensuring its uniform and total cleaning.
  • the arrangement and orientation of the nozzles 25 is such that the cathode ends up being fully cleaned, including its header
  • the cathode is then transferred up to the second gantry 14, by action of the pushing element 11.
  • the bracket 29 starts to rise, guided by the rollers 30 and with the arms 31 and 39 in opening position, as shown in figure 10.
  • the cathode 42 is introduced into the bracket 29, up to the point when said bracket reaches its upper limiting position, in which the claws 35 are located above the upper edge of the electro-deposited metal layers 43.
  • the claws 35 include a wedge shaped vertical section lower area 44, with the angle edge parallel to the cathode plate 42.
  • the internal surface of the wedge shaped area 44 is parallel to the cathode plate and is slightly separated from it.
  • the claws may be fitted with a plastic protection device 45.
  • the angle edge of the areas 44 is subjected to an anti-wear treatment, to enable said angle edges to withstand high number of working cycles without showing any appreciable wear.
  • the support of the rollers 36 ensure a correct positioning, both of the cathode and of the claws 35 in respect to it.
  • the distance between lower angle edge of the wedge shaped areas 44 of the claws and the upper edge of the electro-deposited layers 44 may be adjusted, regulating for instance the position of the plate 46 supporting on each side one of the claws 35.
  • the bracket 29 initiates a lowering movement, with the rollers 36 turning freely in contact with the plate of the cathode 42 and, therefore, maintaining the relative position of the claws 35 in respect to said cathode.
  • Figure 13 shows the beginning of the lowering stage of the bracket 29, in which stage takes place the contact of the angle edge of the wedge shaped areas, of the claws 35, with the upper edge of the electro-deposited layers 43, causing a penetration of said angle edge and initiating the separation of the deposits 43, all of the above as shown on figure 13.
  • the cylinders 41 are then activated, figure 16, causing a tilting of the arms 39 towards their converging position, at which the free turning rollers 38 mounted at the end of said arms shall be supported upon the areas that have come off the electro-deposited layers 43, bringing them closer towards the plate of the cathode 42.
  • the adoption of the described working method eliminates the risk of damaging the protection of the lower edge of the cathode, given that neither the claws nor the rollers do ever get to contact this lower protection.
  • the torque created between the free turning rollers 38 and the claws prevents the lower edge of the peeled layers from colliding with the protection of the lower edge of the cathodes. To sum up, it prevents any action that may damage the lower protection of the cathode plate.
  • the vertical claws do not get to lean directly upon the cathode plate, thus preventing any metal to metal contact that may damage the surfaces of the plate.
  • the cathodes are subjected to a full washing operation at the cathode reception area 1, and the electro-deposited metal layers are taken off by way of a continuous process carried out using the claws 35, during the lowering motion of the bracket 29, without causing any damage to the cathode plate 42, because of the free turning rollers 36, mounted on the same turning axis as the claws 35 and to the plastic material protection devices 45 fitted on said claws.
  • the modular constitution of the facilities described allows the arrangement, as required, of two or more treatment areas, each one of them with their corresponding washing and extraction means.

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)
  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)
  • Cold Cathode And The Manufacture (AREA)
EP95500137A 1995-10-06 1995-10-06 Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden Expired - Lifetime EP0767256B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE69506411T DE69506411T2 (de) 1995-10-06 1995-10-06 Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden
EP95500137A EP0767256B1 (de) 1995-10-06 1995-10-06 Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden
AT95500137T ATE174073T1 (de) 1995-10-06 1995-10-06 Anlage zum abstreifen von elektrolytisch niedergeschlagenen schichten auf kathoden
DK95500137T DK0767256T3 (da) 1995-10-06 1995-10-06 Anlæg til frigørelse af på katoder galvanisk aflejrede lag
GR990400620T GR3029525T3 (en) 1995-10-06 1999-03-01 Facility to loosen off the layers electro-deposited upon cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95500137A EP0767256B1 (de) 1995-10-06 1995-10-06 Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden

Publications (2)

Publication Number Publication Date
EP0767256A1 true EP0767256A1 (de) 1997-04-09
EP0767256B1 EP0767256B1 (de) 1998-12-02

Family

ID=8221659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95500137A Expired - Lifetime EP0767256B1 (de) 1995-10-06 1995-10-06 Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden

Country Status (5)

Country Link
EP (1) EP0767256B1 (de)
AT (1) ATE174073T1 (de)
DE (1) DE69506411T2 (de)
DK (1) DK0767256T3 (de)
GR (1) GR3029525T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110892A1 (de) * 1999-12-20 2001-06-27 n.v. Union Miniere s.a. Verfahren zur Handhabung von Metallplatten
JP2012516943A (ja) * 2009-02-06 2012-07-26 エクストラータ テクノロジー プロプライアタリー リミテッド 陰極板から金属を剥離する装置
CN110846682A (zh) * 2019-11-29 2020-02-28 金川集团股份有限公司 一种种板固定装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009018602A1 (en) * 2007-08-07 2009-02-12 Xstrata Technology Pty Ltd Apparatus for stripping metal from a cathode plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035019A1 (de) * 1979-09-20 1981-04-09 Mitsui Mining & Smelting Co.Ltd., Tokyo Basisplatte fuer die elektrolytische raffination und bearbeitunsvorrichtung dafuer
US4479854A (en) * 1983-02-14 1984-10-30 Cominco Ltd. Method and apparatus for stripping cathodes
DE3733683A1 (de) * 1986-10-03 1988-06-16 Outokumpu Oy Verfahren und vorrichtung zum abstreifen einer duennen schicht elektrolytmetall von seiner stuetzkonstruktion
ES2005673A6 (es) 1986-11-04 1989-03-16 Mim Techn Marketing Ltd Procedimiento para arrancar de un catodo electroliticamente depositado.
ES2020729A6 (es) 1990-08-01 1991-09-01 Asturiana De Zinc Sa Instalacion para desprender la capa de zinc depositada por electrolisis sobre catodos planos y catodo utilizado.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035019A1 (de) * 1979-09-20 1981-04-09 Mitsui Mining & Smelting Co.Ltd., Tokyo Basisplatte fuer die elektrolytische raffination und bearbeitunsvorrichtung dafuer
US4479854A (en) * 1983-02-14 1984-10-30 Cominco Ltd. Method and apparatus for stripping cathodes
DE3733683A1 (de) * 1986-10-03 1988-06-16 Outokumpu Oy Verfahren und vorrichtung zum abstreifen einer duennen schicht elektrolytmetall von seiner stuetzkonstruktion
ES2005673A6 (es) 1986-11-04 1989-03-16 Mim Techn Marketing Ltd Procedimiento para arrancar de un catodo electroliticamente depositado.
ES2020729A6 (es) 1990-08-01 1991-09-01 Asturiana De Zinc Sa Instalacion para desprender la capa de zinc depositada por electrolisis sobre catodos planos y catodo utilizado.
EP0470033A2 (de) * 1990-08-01 1992-02-05 Asturiana De Zinc, S.A. Vorrichtung zum Abstreifen von auf Aluminiumplatten elektrolytisch ausgefälltem Zink

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110892A1 (de) * 1999-12-20 2001-06-27 n.v. Union Miniere s.a. Verfahren zur Handhabung von Metallplatten
WO2001046052A1 (fr) * 1999-12-20 2001-06-28 Umicore Procede de manutention de feuilles metalliques
JP2012516943A (ja) * 2009-02-06 2012-07-26 エクストラータ テクノロジー プロプライアタリー リミテッド 陰極板から金属を剥離する装置
CN110846682A (zh) * 2019-11-29 2020-02-28 金川集团股份有限公司 一种种板固定装置

Also Published As

Publication number Publication date
DE69506411D1 (de) 1999-01-14
DK0767256T3 (da) 1999-08-16
ATE174073T1 (de) 1998-12-15
DE69506411T2 (de) 1999-06-24
EP0767256B1 (de) 1998-12-02
GR3029525T3 (en) 1999-06-30

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