AT411465B - Stripping cathode, for precipitating metals from solution in electrolytic cell, comprises parallel metal sheets sandwiching insulant layer - Google Patents

Stripping cathode, for precipitating metals from solution in electrolytic cell, comprises parallel metal sheets sandwiching insulant layer Download PDF

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Publication number
AT411465B
AT411465B AT11492001A AT11492001A AT411465B AT 411465 B AT411465 B AT 411465B AT 11492001 A AT11492001 A AT 11492001A AT 11492001 A AT11492001 A AT 11492001A AT 411465 B AT411465 B AT 411465B
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Austria
Prior art keywords
cathode
sheets
conductive layer
stripping
held
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Application number
AT11492001A
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German (de)
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ATA11492001A (en
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Prior Eng Ag
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02Electrodes; Connections thereof

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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)

Abstract

Stripping cathode comprises two parallel metal sheets sandwiching an electrically non-conducting layer that projects above the sheets by at least 0.5 mm, at least where wetted by the electrolyte. It is held liquid-tight between the sheets and is made of plastic.

Description

       

  



   5. Abstreifkathode nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die nichtleitende Schicht (4) aus Kunststoff besteht. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



  



   5. stripping cathode according to one of claims 1 to 4, characterized in that the non-conductive layer (4) consists of plastic.

** WARNING ** End of DESC field may overlap beginning of CLMS **.


    

Claims (4)

<Desc/Clms Page number 1>  <Desc / Clms Page number 1>   Die Erfindung betrifft eine Abstreifkathode zum Abscheiden von Metallen aus Lösungen in einer Elektrolysezelle.  The invention relates to a stripping cathode for depositing metals from solutions in an electrolytic cell. Abstreifkathoden sind unter den Elektrolysebedingungen, bei denen sie zum Einsatz kommen, unlösliche Bleche, auf denen ein Metall abgeschieden wird, das vom Kathodenmaterial verschieden ist und an der Kathode nur so schwach haftet, dass es leicht davon abgestreift werden kann.  Under the electrolysis conditions in which they are used, stripping cathodes are insoluble sheets on which a metal is deposited that is different from the cathode material and only adheres to the cathode so weakly that it can easily be stripped off. Dies erfolgt häufig ohne Unterbrechung der Elektrolyse. This is often done without interrupting the electrolysis. An üblichen Abstreifkathoden tritt der sogenannte Kanteneffekt auf, durch den sich an den Blechrändern Büschel aus abgeschiedenen Metall bilden, die, wenn sie nicht rechtzeitig entfernt werden, sogar Schlüsse innerhalb der Elektrolysezelle verursachen können.  The so-called edge effect occurs on conventional stripping cathodes, which creates tufts of deposited metal on the edges of the sheet metal, which, if not removed in time, can even cause short circuits within the electrolysis cell. Zur Abhilfe ist die erfindungsgemässe Abstreifkathode vor allem dadurch gekennzeichnet, dass die Kathode zwei zueinander parallele Bleche aufweist, zwischen denen eine elektrisch nichtleitende Schicht sandwichartig festgehalten ist.  To remedy this, the stripping cathode according to the invention is primarily characterized in that the cathode has two mutually parallel sheets, between which an electrically non-conductive layer is held in a sandwich-like manner. Vor allem ist dabei vorgesehen, dass die nichtleitende Schicht zumindest im Benetzungsbereich des Elektrolyten, also zumindest unterhalb und am Elektrolytniveau der Elektrolysezelle, über die Bleche hinausragt, bevorzugt um zumindest 0, 5 mm.  Above all, it is provided that the non-conductive layer protrudes beyond the sheets at least in the wetting area of the electrolyte, that is to say at least below and at the electrolyte level of the electrolytic cell, preferably by at least 0.5 mm. Insbesondere ist die nichtleitende Schicht flüssigkeitsdicht zwischen den Blechen gehalten.  In particular, the non-conductive layer is kept liquid-tight between the sheets. Bevorzugt besteht die nichtleitende Schicht aus Kunststoff.  The non-conductive layer preferably consists of plastic. Im folgenden wird die Erfindung anhand eines Beispiels unter Bezugnahme auf die Zeichnung näher beschrieben, in der Fig. 1 eine Seitenansicht und Fig. 2 eine Stirnansicht eines erfindungs- gemässen "Kathodenblechsandwiches" ist.  In the following, the invention is described in more detail using an example with reference to the drawing, in which FIG. 1 is a side view and FIG. 2 is an end view of a “cathode sheet sandwich” according to the invention. An einer elektrisch leitenden Einhängeschiene 1 sind zwei Kathodenbleche 2, 3 angeschweisst, zwischen denen eine Kunststoffschicht 4 mittels Schraubenbolzen 5 und Stiften 6 gehalten ist.  Two cathode sheets 2, 3 are welded to an electrically conductive hanging rail 1, between which a plastic layer 4 is held by means of screw bolts 5 and pins 6. Das Kathodenblechsandwich wird an der Einhängeschiene 1 in die Elektrolysezelle eingehängt und fixiert.  The cathode sheet sandwich is hooked onto the mounting rail 1 in the electrolysis cell and fixed. Wie aus Fig. 1 ersichtlich, überragt die Kunststoffschicht 4 seitlich und unten die Bleche 2 und 3 und endet oben knapp unterhalb der Einhängeschiene 1, also beträchtlich oberhalb des möglichen Eletrolytniveaus in der Zelle.  As can be seen from FIG. 1, the plastic layer 4 projects laterally and below the metal sheets 2 and 3 and ends at the top just below the hanging rail 1, that is to say considerably above the possible electrolyte level in the cell. PATENTANSPRÜCHE : 1. Abstreifkathode zum Abscheiden von Metallen aus Lösungen in einer Elektrolysezelle, da- durch gekennzeichnet, dass die Kathode zwei zueinander parallele Bleche (2, 3) aufweist, zwischen denen eine elektrisch nichtleitende Schicht (4) sandwichartig festgehalten ist.  PATENT CLAIMS: 1. Scraper cathode for separating metals from solutions in an electrolysis cell, characterized in that the cathode has two mutually parallel sheets (2, 3), between which an electrically non-conductive layer (4) is held in a sandwich-like manner. 2. Abstreifkathode nach Anspruch 1, dadurch gekennzeichnet, dass die nichtleitende Schicht (4) zumindest im Benetzungsbereich des Elektrolyten über die Bleche (2, 3) hinausragt.  2. Scraper cathode according to claim 1, characterized in that the non-conductive layer (4) protrudes beyond the sheets (2, 3) at least in the wetting area of the electrolyte. 3. Abstreifkathode nach Anspruch 2, dadurch gekennzeichnet, dass die nichtleitende Schicht (4) über die Bleche (2, 3) jeweils um mindestens 0, 5 mm hinausragt.  3. stripping cathode according to claim 2, characterized in that the non-conductive layer (4) on the sheets (2, 3) protrudes by at least 0.5 mm. 4. Abstreifkathode nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die nichtleitende Schicht (4) flüssigkeitsdicht zwischen den Blechen (2, 3) gehalten ist. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**.  4. stripping cathode according to one of claims 1 to 3, characterized in that the non-conductive layer (4) is held liquid-tight between the sheets (2, 3). ** WARNING ** End of CLMS field knows overlap beginning of DESC **.
AT11492001A 2001-07-24 2001-07-24 Stripping cathode, for precipitating metals from solution in electrolytic cell, comprises parallel metal sheets sandwiching insulant layer AT411465B (en)

Priority Applications (1)

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AT11492001A AT411465B (en) 2001-07-24 2001-07-24 Stripping cathode, for precipitating metals from solution in electrolytic cell, comprises parallel metal sheets sandwiching insulant layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT11492001A AT411465B (en) 2001-07-24 2001-07-24 Stripping cathode, for precipitating metals from solution in electrolytic cell, comprises parallel metal sheets sandwiching insulant layer

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ATA11492001A ATA11492001A (en) 2003-06-15
AT411465B true AT411465B (en) 2004-01-26

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508485A1 (en) * 1985-03-09 1986-09-11 W.C. Heraeus Gmbh, 6450 Hanau Electrode having a noble metal surface, and method for the fabrication thereof
EP0229473A1 (en) * 1985-12-16 1987-07-22 Imperial Chemical Industries Plc Electrode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508485A1 (en) * 1985-03-09 1986-09-11 W.C. Heraeus Gmbh, 6450 Hanau Electrode having a noble metal surface, and method for the fabrication thereof
EP0229473A1 (en) * 1985-12-16 1987-07-22 Imperial Chemical Industries Plc Electrode

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