EP1230439B1 - Procede permettant d'empecher des courants de fuite dans des elements peripheriques d'une installation d'electrolyse destinee a l'extraction de metaux - Google Patents

Procede permettant d'empecher des courants de fuite dans des elements peripheriques d'une installation d'electrolyse destinee a l'extraction de metaux Download PDF

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Publication number
EP1230439B1
EP1230439B1 EP00941961A EP00941961A EP1230439B1 EP 1230439 B1 EP1230439 B1 EP 1230439B1 EP 00941961 A EP00941961 A EP 00941961A EP 00941961 A EP00941961 A EP 00941961A EP 1230439 B1 EP1230439 B1 EP 1230439B1
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EP
European Patent Office
Prior art keywords
electrolyte
line
contact point
supply line
reservoir
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.)
Expired - Lifetime
Application number
EP00941961A
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German (de)
English (en)
Other versions
EP1230439A1 (fr
Inventor
Nikola Anastasijevic
Stefan Laibach
Friedhelm MÜNKER
Markus Schweitzer
Walter Kühn
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.)
Outokumpu Oyj
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Outokumpu Oyj
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Publication of EP1230439A1 publication Critical patent/EP1230439A1/fr
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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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions

Definitions

  • the invention relates to a method for electrolytic Recovering a metal which is ionogenic in an electrolyte is contained, wherein the electrolyte from a reservoir by at least one supply line to an electrolysis area with Anodes and cathodes and at least one DC source is passed and wherein used electrolyte by at least a derivative of the electrolysis area at least partially is returned to the reservoir.
  • the invention is based on the object by the Supply and drain current flowing to simple and fail to make operationally safe manner, so that even at relatively high electrical voltages in the electrolysis area Stray currents in the peripheral parts of the plant outside the Electrolysis be effectively avoided. According to the invention this succeeds in the aforementioned method in that between a first contact point in the electrolyte of Feed line and a second contact point in the electrolyte of Derivation of an electrolyte-containing bridge line, wherein the ohmic resistance of the electrolyte R1 in the Bridge line between the first and second contact point is at most 10% of the ohmic resistance R2, the between the first and second contact points in through the Reservoir flowing electrolytes, and that the flowing per unit time through the bridge line Amount of electrolyte at most 5% of that in the supply line in the range the first contact point is flowing amount of electrolyte.
  • the difference is the electrical voltage in the electrolysis area between the supply line and the discharge line At least 20 volts, it can be lower but especially be much higher.
  • the problem of stray currents is with Growing voltage difference getting bigger and in the present Case is the intended bridge line especially then advantageous if the voltage difference in the electrolysis area between the supply line and the drain 100 - 800 volts is.
  • the ohmic resistance of the electrolyte flow in the feed line between the first Contact point and the electrolysis area and between the second contact point and the electrolysis area respectively at least 5 times and preferably at least 20 times of R2 is. This can be done e.g. achieve that the Length of the line between the first and second Contact point and the electrolysis area several meters and especially 10 to 100 m.
  • a or in the bridge line several flow obstacles, but at the same time a continuous electrolytic wetting exists.
  • Flow obstacles are suitable e.g. a pile out insulating granules, e.g. Ceramic or plastic beads, Nets, a knit, a sponge-like graft, a Diaphragm or an ion exchange membrane, in particular Anion exchange membrane.
  • a control valve be arranged through which the can set desired low electrolyte flow.
  • the electrolysis may be for the recovery of copper, nickel, zinc or Cobalt serve, where with the known Electrolyte solutions works. Details of the design a metal extraction electrolysis are known and e.g. in Ullmann's Encyclopedia of Industrial Chemistry, 5. Edition, Volume A9, pages 197-217.
  • the electrolysis region (1) has a DC voltage source (2), in a conventional manner provides the necessary voltage between the cathodes and anodes.
  • the electrolysis region (1) is only schematic in FIG. 1 shown and can in practice from many in a row switched electrolyte containers with numerous hinged plate-shaped electrodes.
  • Electrolysis area (1) Through the supply line (4) is fresh electrolyte in the Electrolysis area (1), which comes from the storage tank (6) and first by means of the circulation pump (5) Preheater (7) is guided. At the entry point (4a) flows the electrolyte in the electrolysis area (1).
  • Used electrolyte is passed through from the exit point (9a) the derivative (9) deducted and at least partially back in led the tank (6).
  • the tank is not one connected to him electrolyte preparation, which also him supplying fresh electrolyte.
  • the power supply of the Electrolysis only partially affects the peripheral Plant components.
  • the Voltage source (2) Due to the electrical conductivity of the electrolyte calls the Voltage source (2) produces a current through the supply line (4) and the drain (9) flows and all with these lines connected plant components. So this so-called Stray current does not interfere in the tank (6) and in the Preheater (7) and possibly other peripheral System parts is distracting effect and in particular too Corrosion leads are the supply and the discharge through the Bridge line (12) electrically connected. It exists between a first contact point (A) in the electrolyte of Feed line and a second contact point (B) in the electrolyte the derivation of an electrically conductive connection through the Bridge line (12).
  • the bridge line (12a) of Figure (2) which is the supply line (4) connects to the drain (9), has a control valve (15) on and is with closable vent lines (16) and (17) provided.
  • the control valve serves the desired Adjustment of the flow of electrolyte through the bridge line (12a).
  • the bridge line (12) is dispensed with.
  • the electrolyte used is for the recovery of copper, it has a temperature in the line (4) of 50 ° C and a conductivity (conductance) of 556.5 mS / cm.
  • the voltage difference between the points (4a) and (9a) is 144 V to earth, an electric current of 3A flows through the lines (4) and (9) and also through the peripheral equipment, where it may cause corrosion.
  • the total resistance of the lines (4) and (9) and the peripheral equipment between the points (4a) and (9a) is 47.5 ohms, of which the line (4) between the point (4a) and the output of the Preheater (7) 0.025 ohms with a line length of 10 m.
  • FIG. 1 The arrangement according to FIG. 1 is operated as in example 1, but now with a bridge line (12a) provided as they is shown in Fig. 2.
  • the ohmic resistance of the Electrolyte in the bridge line is 0.1 ohms.
  • the Voltage difference on the electrolyte circuit outside the Electrolysis arrangement (1) between points (4a) and (9a) is reduced by the near-short to 2.8 V, a current of 27.34 A flows through the bridge line (12a) and a residual current of 0.06 A, e.g. through the preheater (7).
  • a current of 27.34 A flows through the bridge line (12a) and a residual current of 0.06 A, e.g. through the preheater (7).
  • the relatively large current of 27.4 A passing through the lines (4) and (9) flows, increases the energy consumption compared to Example 1, However, it prevents corrosion in the peripheral area System parts (5) to (7).

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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (5)

  1. Procédé pour l'extraction par électrolyse d'un métal qui est contenu de façon ionogène dans un électrolyte, ledit électrolyte étant mené d'un réservoir à une zone électrolytique avec des anodes et cathodes et au moins une source de courant électrique continu par au moins une conduite d'alimentation et électrolyte usé étant redirigé au moins partiellement de ladite zone électrolytique audit réservoir par au moins une conduite d'évacuation, caractérisé en ce qu'il existe une conduite en pont contenant de l'électrolyte entre un premier endroit de contact dans l'électrolyte de ladite conduite d'alimentation et un second endroit de contact dans l'électrolyte de ladite conduite d'évacuation, la résistance ohmique R1 de l'électrolyte dans ladite conduite en pont entre ledit premier et ledit second endroit de contact s'élevant au plus à 10% de la résistance ohmique R2 qui existe entre ledit premier et ledit second endroit de contact dans l'électrolyte circulant à travers ledit réservoir, et que la quantité d'électrolyte circulant à travers ladite conduite en pont par unité de temps s'élève au plus à 5% de la quantité d'électrolyte circulant dans ladite conduite d'alimentation au niveau dudit premier endroit de contact.
  2. Procédé selon la revendication 1, caractérisé en ce que la résistance ohmique du courant électrolytique dans ladite conduite d'alimentation entre ledit premier endroit de contact et ladite zone électrolytique s'élève au moins au quintuple de R2.
  3. Procédé selon la revendication 1, caractérisé en ce que la résistance ohmique du courant électrolytique dans ladite conduite d'évacuation entre ladite zone électrolytique et ledit second endroit de contact s'élève au moins au quintuple de R2.
  4. Procédé selon la revendication 1 ou l'une des suivantes, caractérisé en ce que la différence en tension électrique dans ladite zone électrolytique entre ladite conduite d'alimentation et ladite conduite d'évacuation s'élève au moins à 20 Volts.
  5. Procédé selon la revendication 1 ou l'une des suivantes, caractérisé en ce que ladite conduite en pont comporte une section transversale variable pour la circulation de l'électrolyte.
EP00941961A 1999-08-27 2000-05-19 Procede permettant d'empecher des courants de fuite dans des elements peripheriques d'une installation d'electrolyse destinee a l'extraction de metaux Expired - Lifetime EP1230439B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19940699A DE19940699C2 (de) 1999-08-27 1999-08-27 Verfahren zum Verhindern von Streuströmen in peripheren Anlagenteilen in einer Elektrolyse zum Gewinnen von Metallen
DE19940699 1999-08-27
PCT/EP2000/004524 WO2001016401A1 (fr) 1999-08-27 2000-05-19 Procede permettant d'empecher des courants de fuite dans des elements peripheriques d'une installation d'electrolyse destinee a l'extraction de metaux

Publications (2)

Publication Number Publication Date
EP1230439A1 EP1230439A1 (fr) 2002-08-14
EP1230439B1 true EP1230439B1 (fr) 2003-07-16

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EP00941961A Expired - Lifetime EP1230439B1 (fr) 1999-08-27 2000-05-19 Procede permettant d'empecher des courants de fuite dans des elements peripheriques d'une installation d'electrolyse destinee a l'extraction de metaux

Country Status (8)

Country Link
US (1) US6547949B1 (fr)
EP (1) EP1230439B1 (fr)
AT (1) ATE245211T1 (fr)
AU (1) AU775279B2 (fr)
DE (2) DE19940699C2 (fr)
ES (1) ES2202143T3 (fr)
PE (1) PE20010813A1 (fr)
WO (1) WO2001016401A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU700565A1 (ru) * 1978-02-15 1979-11-30 Государственный Научно-Исследовательский Институт Автоматизации Производственных Процессов Химической Промышленности И Цветной Металлургии Нииавтоматика Устройство дл прерывани струи электролита
US4285794A (en) * 1980-02-19 1981-08-25 Exxon Research & Engineering Co. Annular electrodes for shunt current elimination
JPS62170491A (ja) * 1986-01-23 1987-07-27 Mitsui Toatsu Chem Inc 食塩電解槽の水素分離器導入管部の電蝕防止方法
US5876575A (en) * 1995-09-05 1999-03-02 Kump; Joseph A. Method and apparatus for treatment of water
US6261439B1 (en) * 1998-10-30 2001-07-17 Robert J. Schwabe Cathodic protection system for mitigating stray electric current effects

Also Published As

Publication number Publication date
US6547949B1 (en) 2003-04-15
AU5674500A (en) 2001-03-26
DE19940699C2 (de) 2002-02-07
EP1230439A1 (fr) 2002-08-14
PE20010813A1 (es) 2001-09-08
DE19940699A1 (de) 2001-03-08
ES2202143T3 (es) 2004-04-01
DE50002936D1 (de) 2003-08-21
WO2001016401A1 (fr) 2001-03-08
AU775279B2 (en) 2004-07-29
ATE245211T1 (de) 2003-08-15

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