EP1230439B1 - Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals - Google Patents
Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals Download PDFInfo
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- 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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- electrolyte
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- supply line
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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
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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
- 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).
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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)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum elektrolytischen Gewinnen eines Metalls, welches in einem Elektrolyten ionogen enthalten ist, wobei der Elektrolyt von einem Vorratsbehälter durch mindestens eine Zuleitung zu einem Elektrolysebereich mit Anoden und Kathoden und mindestens einer Gleichspannungs-quelle geführt wird und wobei gebrauchter Elektrolyt durch mindestens eine Ableitung vom Elektrolysebereich zumindest teilweise zurück zum Vorratsbehälter geleitet wird.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.
Bei Elektrolyseanlagen dieser Art fließt üblicherweise ein sogenannter Streustrom durch die Zuleitung und die Ableitung, welcher in den peripheren Anlagenteilen, z.B. im Vorratsbehälter, in der Elektrolyt-Konditionierung und einem üblicherweise vorhandenen Elektrolyt-Vorwärmer zu Korrosionsproblemen führt. Würde man die Zuleitung und/oder die Ableitung erden, so käme es im Bereich des Erdungsanschlusses zu Metallablagerung in der Leitung. Wenn man diese Probleme durch Stromunterbrechung lösen wollte, wäre dies mit ganz erheblichen Kosten verbunden. In electrolysis systems of this type usually flows so-called stray current through the supply line and the derivative, which in the peripheral equipment parts, e.g. in the reservoir, in the electrolyte conditioning and a usually existing electrolyte preheater too Corrosion problems leads. Would you the supply line and / or the Emitting ground, it would come in the area of the ground connection to metal deposit in the pipe. If you have these problems wanted to solve by power interruption, this would be complete considerable costs.
Der Erfindung liegt die Aufgabe zugrunde, den durch die Zuleitung und die Ableitung fließenden Strom auf einfache und betriebssichere Weise unwirksam zu machen, so daß auch bei relativ hohen elektrischen Spannungen im Elektrolysebereich Streuströme in den peripheren Anlagenteilen außerhalb des Elektrolysebereichs wirksam vermieden werden. Erfindungsgemäß gelingt dies beim eingangs genannten Verfahren dadurch, daß zwischen einer ersten Kontaktstelle im Elektrolyten der Zuleitung und einer zweiten Kontaktstelle im Elektrolyten der Ableitung eine Elektrolyt enthaltende Brückenleitung besteht, wobei der ohmsche Widerstand R1 des Elektrolyten in der Brückenleitung zwischen der ersten und zweiten Kontaktstelle höchstens 10 % des ohmschen Widerstands R2 beträgt, der zwischen der ersten und zweiten Kontaktstelle im durch den Vorratsbehälter fließenden Elektrolyten besteht, und daß die pro Zeiteinheit durch die Brückenleitung fließende Elektrolytmenge höchstens 5 % der in der Zuleitung im Bereich der ersten Kontaktstelle fließenden Elektrolytmenge ist.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.
Üblicherweise beträgt die Differenz der elektrischen Spannung im Elektrolysebereich zwischen der Zuleitung und der Ableitung mindestens 20 Volt, sie kann niedriger aber insbesondere auch viel höher sein. Das Problem der Streuströme wird mit wachsender Spannungsdifferenz immer größer und im vorliegenden Fall ist die vorgesehene Brückenleitung besonders dann vorteilhaft, wenn die Spannungsdifferenz im Elektrolysebereich zwischen der Zuleitung und der Ableitung 100 - 800 Volt beträgt.Usually, 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.
Man sorgt zweckmäßigerweise dafür, daß der ohmsche Widerstand des Elektrolytstroms in der Zuleitung zwischen der ersten Kontaktstelle und dem Elektrolysebereich sowie zwischen der zweiten Kontaktstelle und dem Elektrolysebereich jeweils mindestens das 5-fache und vorzugsweise mindestens das 20-fache von R2 beträgt. Dies kann man z.B. dadurch erreichen, daß die Länge der Leitung zwischen der ersten bzw. zweiten Kontaktstelle und dem Elektrolysebereich mehrere Meter und insbesondere 10 bis 100 m beträgt.It is expedient to ensure that 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.
Man sorgt dafür, daß der ohmsche Widerstand des Elektrolyten in der Brückenleitung möglichst klein ist, so daß die Brückenleitung zwischen der Zuleitung und der Ableitung ganz oder nahezu wie ein elektrischer Kurzschluß wirkt. Gleichzeitig ist es wichtig, daß der Elektrolytfluß durch die Brückenleitung klein ist und möglichst ganz unterbunden wird. Zu diesem Zweck bringt man in der Brückenleitung beispielsweise ein oder mehrere Strömungshindernisse an, wobei aber gleichzeitig eine durchgehende elektrolytische Benetzung besteht. Für das Strömungshindernis eignen sich z.B. eine Schüttung aus isolierendem Granulat, z.B. Keramik- oder Plastikkügelchen, Netze, ein Gestrick, ein schwammartiger Pfropfen, ein Diaphragma oder eine Ionenaustauschermembran, insbesondere Anionenaustauschermembran. Ferner kann in der Brückenleitung ein Regelventil angeordnet sein, durch welches sich der gewünschte geringe Elektrolyt-Durchfluß einstellen läßt.Make sure that the ohmic resistance of the electrolyte in the bridge line is as small as possible, so that the Bridge line between the supply line and the drainage completely or almost as an electrical short circuit acts. simultaneously It is important that the flow of electrolyte through the bridge line is small and is prevented as completely as possible. To this end For example, you can put a or in the bridge line several flow obstacles, but at the same time a continuous electrolytic wetting exists. For the 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. Furthermore, in the bridge line a control valve be arranged through which the can set desired low electrolyte flow.
Die Elektrolyse kann dem Gewinnen von Kupfer, Nickel, Zink oder Kobalt dienen, wobei man mit den an sich bekannten Elektrolytlösungen arbeitet. Einzelheiten der Ausgestaltung einer der Metallgewinnung dienenden Elektrolyse sind bekannt und z.B. in Ullmann's Encyclopedia of Industrial Chemistry, 5. Auflage, Band A9, Seiten 197-217, beschrieben.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.
Ausgestaltungsmöglichkeiten des Verfahrens werden mit Hilfe der Zeichnung erläutert. Es zeigt:
- Fig. 1
- ein Fließschema des Verfahrens und
- Fig. 2
- eine Variante der Brückenleitung in schematischer Darstellung.
- Fig. 1
- a flow chart of the process and
- Fig. 2
- a variant of the bridge line in a schematic representation.
Gemäß Fig. 1 weist der Elektrolysebereich (1) eine Gleichspannungsquelle (2) auf, die in an sich bekannter Weise für die nötige Spannung zwischen den Kathoden und Anoden sorgt. Der Elektrolysebereich (1) ist in Fig. 1 nur schematisch dargestellt und kann in der Praxis aus vielen hintereinander geschalteten Elektrolytbehältern mit zahlreichen eingehängten plattenförmigen Elektroden bestehen.According to FIG. 1, 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.
Durch die Zuleitung (4) wird frischer Elektrolyt in den Elektrolysebereich (1) geführt, der vom Vorratstank (6) kommt und zunächst mit Hilfe der Kreislaufpumpe (5) durch einen Vorwärmer (7) geführt wird. Bei der Eintrittsstelle (4a) fließt der Elektrolyt in den Elektrolysebereich (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).
Gebrauchter Elektrolyt wird von der Austrittsstelle (9a) durch die Ableitung (9) abgezogen und mindestens teilweise zurück in den Tank (6) geführt. Der Tank ist mit einer nicht dargestellten Elektrolyt-Aufbereitung verbunden, die ihm auch frischen Elektrolyt zuführt. Die Spannungsversorgung der Elektrolyse wirkt nur teilweise auf die peripheren Anlagenteile.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.
Durch die elektrische Leitfähigkeit des Elektrolyten ruft die Spannungsquelle (2) einen Strom hervor, der durch die Zuleitung (4) und die Ableitung (9) fließt und alle mit diesen Leitungen verbundenen Anlagenteile erfasst. Damit dieser sogenannte Streustrom nicht in störender Weise im Tank (6) und im Vorwärmer (7) und eventuell noch anderen peripheren Anlagenteilen störend wirksam wird und insbesondere zu Korrosion führt, sind die Zuleitung und die Ableitung durch die Brückenleitung (12) elektrisch verbunden. Dabei besteht zwischen einer ersten Kontaktstelle (A) im Elektrolyten der Zuleitung und einer zweiten Kontaktstelle (B) im Elektrolyten der Ableitung eine elektrisch leitende Verbindung durch die Brückenleitung (12). Damit der Elektrolytfluß durch die Brückenleitung (12) ganz oder weitgehend unterbunden ist, gibt es in der Brückenleitung (12) ein Strömungshindernis (13), das jedoch den Fluß des elektrischen Stromes nicht oder kaum behindert. Dadurch wirkt die Brückenleitung mit dem darin befindlichen Elektrolyten ganz oder nahezu wie ein elektrischer Kurzschluß, der den Streustrom durch den Elektrolyten vom Bereich des Tanks (6) und des Vorwärmers (7) fernhält. Üblicherweise beträgt der Streustrom, der z.B. durch den Vorwärmer (7) fließt, höchstens 10 % des durch die Brückenleitung (12) fließenden Stroms. Es ist durchaus möglich, daß man mit Strömen von 10 bis 50 A rechnen muß, die durch die Brückenleitung (12) fließen.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). So that the electrolyte flow through the Bridge line (12) is completely or largely prevented, there there is a flow obstacle (13) in the bridge line (12) but not or hardly the flow of electric current with special needs. As a result, the bridge line with the acts in it located electrolyte completely or almost as an electrical Short circuit, the stray current through the electrolyte of the Area of the tank (6) and the preheater (7) keeps away. Usually, the stray current, e.g. through the Preheater (7) flows, at most 10% of the through Bridge line (12) flowing current. It is quite possible that one must reckon with currents of 10 to 50 A, which by the Bridge line (12) flow.
Die Brückenleitung (12a) der Figur (2), welche die Zuleitung (4) mit der Ableitung (9) verbindet, weist ein Regelventil (15) auf und ist mit verschließbaren Entlüftungsleitungen (16) und (17) versehen. Das Regelventil dient der gewünschten Einstellung des Elektrolytflusses durch die Brückenleitung (12a).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).
Bei der Anordnung gemäß Fig. 1 wird auf die Brückenleitung (12) verzichtet. Der verwendete Elektrolyt dient der Gewinnung von Kupfer, er hat eine Temperatur in der Leitung (4) von 50°C und eine spezifische Leitfähigkeit (Leitwert) von 556,5 mS/cm. Durch die Leitungen (4) und (9) fließen 260 m3/h Elektrolyt. Die Spannungsdifferenz zwischen den Punkten (4a) und (9a) beträgt 144 V gegen Erde, ein elektrischer Strom von 3A fließt durch die Leitungen (4) und (9) und auch durch die peripheren Anlagen, er kann dort zu Korrosion führen. Der gesamte Widerstand der Leitungen (4) und (9) und der peripheren Anlagen zwischen den Punkten (4a) und (9a) beträgt 47,5 Ohm, hiervon entfallen auf die Leitung (4) zwischen dem Punkt (4a) und dem Ausgang des Vorwärmers (7) 0,025 Ohm bei einer Leitungslänge von 10 m. In the arrangement according to FIG. 1, 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. Through the lines (4) and (9) flow 260 m 3 / h of electrolyte. 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.
Die Anordnung gemäß Fig. 1 wird wie im Beispiel 1 betrieben, aber nunmehr mit einer Brückenleitung (12a) versehen, wie sie in Fig. 2 dargestellt ist. Der ohmsche Widerstand des Elektrolyten in der Brückenleitung beträgt 0,1 Ohm. Die Spannungsdifferenz, die am Elektrolytkreislauf außerhalb der Elektrolseanordnung (1) zwischen den Punkten (4a) und (9a) liegt, verringert sich durch den Beinahe-Kurzschluß auf 2,8 V, es fließt ein Strom von 27,34 A durch die Brückenleitung (12a) und ein Reststrom von 0,06 A z.B. durch den Vorwärmer (7). Der relativ große Strom von 27,4 A, der durch die Leitungen (4) und (9) fließt, erhöht den Energieaufwand gegenüber Beispiel 1, verhindert jedoch Korrosionen im Bereich der peripheren Anlagenteile (5) bis (7).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). Of 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).
Claims (5)
- A process for the electrolytic recovery of a metal which is ionogenically contained in an electrolyte, wherein the electrolyte is supplied from a reservoir through at least one supply line to an electrolysis area including anodes and cathodes and at least one DC voltage source, and wherein used electrolyte is at least partly recirculated from the electrolysis area to the reservoir through at least one discharge line, characterized in that between a first contact point in the electrolyte of the supply line and a second contact point in the electrolyte of the discharge line a bridge line containing electrolyte is provided, where the ohmic resistance R1 of the electrolyte in the bridge line between the first and the second contact point is not more than 10% of the ohmic resistance R2, which exists between the first and the second contact point in the electrolyte flowing through the reservoir, and that the amount of electrolyte flowing through the bridge line per unit time is not more than 5% of the amount of electrolyte flowing in the supply line in the vicinity of the first contact point.
- The process as claimed in claim 1, characterized in that the ohmic resistance of the flow of electrolyte in the supply line between the first contact point and the electrolysis area is at least 5 times the amount of R2.
- The process as claimed in claim 1, characterized in that the ohmic resistance of the flow of electrolyte in the discharge line between the electrolysis area and the second contact point is at least 5 times the amount of R2.
- The process as claimed in claim 1 or any of the following claims, characterized in that the difference of the electric voltage in the electrolysis area between the supply line and the discharge line is at least 20 Volt.
- The process as claimed in claim 1 or any of the following claims, characterized in that the bridge line has a variable cross-section for the flow of electrolyte.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19940699A DE19940699C2 (en) | 1999-08-27 | 1999-08-27 | Method for preventing stray currents in peripheral plant parts in an electrolysis to extract metals |
| DE19940699 | 1999-08-27 | ||
| PCT/EP2000/004524 WO2001016401A1 (en) | 1999-08-27 | 2000-05-19 | Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1230439A1 EP1230439A1 (en) | 2002-08-14 |
| EP1230439B1 true EP1230439B1 (en) | 2003-07-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00941961A Expired - Lifetime EP1230439B1 (en) | 1999-08-27 | 2000-05-19 | Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6547949B1 (en) |
| EP (1) | EP1230439B1 (en) |
| AT (1) | ATE245211T1 (en) |
| AU (1) | AU775279B2 (en) |
| DE (2) | DE19940699C2 (en) |
| ES (1) | ES2202143T3 (en) |
| PE (1) | PE20010813A1 (en) |
| WO (1) | WO2001016401A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU700565A1 (en) * | 1978-02-15 | 1979-11-30 | Государственный Научно-Исследовательский Институт Автоматизации Производственных Процессов Химической Промышленности И Цветной Металлургии Нииавтоматика | Device for interrupting electrolyte spray |
| US4285794A (en) | 1980-02-19 | 1981-08-25 | Exxon Research & Engineering Co. | Annular electrodes for shunt current elimination |
| JPS62170491A (en) * | 1986-01-23 | 1987-07-27 | Mitsui Toatsu Chem Inc | Method for preventing electrolytic corrosion of hydrogen separator introducing pipe part of electrolytic cell of brine |
| 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 |
-
1999
- 1999-08-27 DE DE19940699A patent/DE19940699C2/en not_active Expired - Fee Related
-
2000
- 2000-05-19 WO PCT/EP2000/004524 patent/WO2001016401A1/en active IP Right Grant
- 2000-05-19 AT AT00941961T patent/ATE245211T1/en not_active IP Right Cessation
- 2000-05-19 US US09/936,392 patent/US6547949B1/en not_active Expired - Fee Related
- 2000-05-19 AU AU56745/00A patent/AU775279B2/en not_active Ceased
- 2000-05-19 ES ES00941961T patent/ES2202143T3/en not_active Expired - Lifetime
- 2000-05-19 DE DE50002936T patent/DE50002936D1/en not_active Expired - Lifetime
- 2000-05-19 EP EP00941961A patent/EP1230439B1/en not_active Expired - Lifetime
- 2000-09-20 PE PE2000000975A patent/PE20010813A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU5674500A (en) | 2001-03-26 |
| PE20010813A1 (en) | 2001-09-08 |
| EP1230439A1 (en) | 2002-08-14 |
| DE19940699C2 (en) | 2002-02-07 |
| WO2001016401A1 (en) | 2001-03-08 |
| ES2202143T3 (en) | 2004-04-01 |
| ATE245211T1 (en) | 2003-08-15 |
| DE19940699A1 (en) | 2001-03-08 |
| DE50002936D1 (en) | 2003-08-21 |
| AU775279B2 (en) | 2004-07-29 |
| US6547949B1 (en) | 2003-04-15 |
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