EP1230439A1 - Verfahren zum verhindern von streuströmen in peripheren anlagenteilen in einer elektrolyse zum gewinnen von metallen - Google Patents
Verfahren zum verhindern von streuströmen in peripheren anlagenteilen in einer elektrolyse zum gewinnen von metallenInfo
- Publication number
- EP1230439A1 EP1230439A1 EP00941961A EP00941961A EP1230439A1 EP 1230439 A1 EP1230439 A1 EP 1230439A1 EP 00941961 A EP00941961 A EP 00941961A EP 00941961 A EP00941961 A EP 00941961A EP 1230439 A1 EP1230439 A1 EP 1230439A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrolyte
- line
- contact point
- electrolysis area
- ohmic resistance
- 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
Links
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 12
- 239000002184 metal Substances 0.000 title claims description 6
- 229910052751 metal Inorganic materials 0.000 title claims description 6
- 230000002093 peripheral effect Effects 0.000 title description 9
- 150000002739 metals Chemical class 0.000 title description 2
- 239000003792 electrolyte Substances 0.000 claims abstract description 55
- 238000000605 extraction Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims 2
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229940021013 electrolyte solution Drugs 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
-
- 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 the electrolytic extraction of a metal which is contained in an electrolyte ionogen, the electrolyte being led from a storage container through at least one feed line to an electrolysis area with anodes and cathodes and at least one DC voltage source, and wherein used electrolyte is passed through at least one a discharge from the electrolysis area is at least partially conducted back to the storage container.
- stray current usually flows through the feed line and the discharge line, which leads to corrosion problems in the peripheral parts of the plant, for example in the storage container, in the electrolyte conditioning and in an electrolyte preheater which is usually present. If the supply line and / or the discharge line were to be earthed, metal deposits would occur in the area of the earth connection. If you wanted to solve these problems by interrupting power, this would be very expensive.
- the invention has for its object to make the current flowing through the lead and the discharge ineffective in a simple and reliable manner, so that stray currents in the peripheral plant parts outside the electrolysis area are effectively avoided even at relatively high electrical voltages.
- an electrolyte-containing bridging line exists between a first contact point in the electrolyte of the feed line and a second contact point in the electrolyte of the discharge line, the ohmic resistance R1 of the electrolyte in the bridging line between the first and second contact points being at most 10 % of the ohmic resistance R2, which exists between the first and second contact points in the electrolyte flowing through the storage container, and that the amount of electrolyte flowing through the bridge line per unit time is at most 5% of the amount of electrolyte flowing in the area of the first contact point.
- the difference in the electrical voltage in the electrolysis area between the supply line and the discharge line is usually at least 20 volts, it can be lower, but in particular also much higher.
- the problem of stray currents increases with increasing voltage difference and in the present case the bridging line provided is particularly advantageous if the voltage difference in the electrolysis area between the supply line and the discharge line is 100-800 volts.
- the ohmic resistance of the electrolyte flow m of the supply line between the first contact point and the electrolysis area and between the second contact point and the electrolysis area is in each case at least 5 times and preferably at least 20 times R2. This can be achieved, for example, by the length of the line between the first and second Contact point and the electrolysis area is several meters and in particular 10 to 100 m.
- 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 discharge line acts completely or almost like an electrical short circuit.
- one or more flow obstacles are installed in the bridge line, but at the same time there is continuous electrolytic wetting.
- the flow obstacle e.g. a bed of insulating granules, e.g. Ceramic or plastic beads, nets, a knitted fabric, a sponge-like plug, a diaphragm or an ion exchange membrane, in particular an anion exchange membrane.
- a control valve can be arranged in the bridge line, by means of which the desired low electrolyte flow can be set.
- Electrolysis can be used to extract copper, nickel, zinc or cobalt, using the electrolyte solutions known per se. Details of the design of an electrolysis used for metal extraction are known and e.g. in Ullmann's Encyclopedia of Industrial Chemistry, 5th edition, volume A9, pages 197-217.
- Fig. 1 shows a flow diagram of the method and Fig. 2 shows a variant of the bridge line in a schematic representation.
- the electrolysis area (1) has a DC voltage source (2), which in a manner known per se provides the necessary voltage between the cathodes and anodes.
- the electrolysis area (1) is only shown schematically in FIG. 1 and can in practice consist of many electrolyte containers connected in series with numerous suspended plate-shaped electrodes.
- Fresh electrolyte is fed through the feed line (4) into the electrolysis area (1), which comes from the storage tank (6) and is first passed through a preheater (7) with the help of the circulation pump (5). At the entry point (4a), the electrolyte flows into the electrolysis area (1).
- Used electrolyte is withdrawn from the outlet point (9a) through the discharge line (9) and at least partially fed back into the tank (6).
- the tank is connected to an electrolyte treatment, not shown, which also supplies fresh electrolyte.
- the electrolysis power supply only partially affects the peripheral parts of the system.
- the voltage source (2) Due to the electrical conductivity of the electrolyte, the voltage source (2) produces a current which flows through the feed line (4) and the discharge line (9) and detects all system parts connected to these lines. So that this so-called stray current does not have a disturbing effect in the tank (6) and in the preheater (7) and possibly still other peripheral system parts and in particular leads to corrosion, the supply line and the discharge line through the bridge line (12) are electrically connected. There is an electrically conductive connection through the bridge line (12) between a first contact point (A) in the electrolyte of the feed line and a second contact point (B) in the electrolyte of the discharge line.
- the bridge line with the electrolyte therein acts completely or almost like an electrical short circuit, which keeps the stray current through the electrolyte away from the area of the tank (6) and the preheater (7).
- the stray current which flows, for example, through the preheater (7) is at most 10% of the current flowing through the bridge line (12). It is quite possible that currents of 10 to 50 A have to be expected which flow through the bridge line (12).
- the bridge line (12a) of FIG. (2) which connects the supply line (4) to the discharge line (9), has a control valve (15) and is provided with closable ventilation lines (16) and (17).
- the control valve serves for the desired setting of the electrolyte flow through the bridge line (12a).
- the bridge line (12) is dispensed with.
- the electrolyte used is used to extract copper, it has a temperature in the line (4) of 50 ° C and a specific conductivity (conductance) of 556.5 mS / cm. 260 m 3 / h of electrolyte flow through lines (4) and (9).
- the voltage difference between points (4a) and (9a) is 144 V to earth, an electrical current of 3A flows through lines (4) and (9) and also through the peripheral systems, where it can lead to corrosion.
- Example 1 is operated as in Example 1, but is now provided with a bridge line (12a), as shown in Fig. 2.
- the ohmic resistance of the electrolyte m of the bridge line is 0.1 ohm.
- the voltage difference, which lies between points (4a) and (9a) on the electrolyte circuit outside the electrolysis arrangement (1), is reduced to 2.8 V by the near-short circuit, a current of 27.34 A flows through the bridge line ( 12a) and a residual current of 0.06 A, for example by the preheater (7).
- the relatively large current of 27.4 A which flows through lines (4) and (9), increases the energy expenditure compared to example 1, but prevents corrosion in the area of the peripheral 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)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19940699 | 1999-08-27 | ||
| DE19940699A DE19940699C2 (de) | 1999-08-27 | 1999-08-27 | Verfahren zum Verhindern von Streuströmen in peripheren Anlagenteilen in einer Elektrolyse zum Gewinnen von Metallen |
| PCT/EP2000/004524 WO2001016401A1 (de) | 1999-08-27 | 2000-05-19 | Verfahren zum verhindern von streuströmen in peripheren anlagenteilen in einer elektrolyse zum gewinnen von metallen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1230439A1 true EP1230439A1 (de) | 2002-08-14 |
| EP1230439B1 EP1230439B1 (de) | 2003-07-16 |
Family
ID=7919815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00941961A Expired - Lifetime EP1230439B1 (de) | 1999-08-27 | 2000-05-19 | Verfahren zum verhindern von streuströmen in peripheren anlagenteilen in einer elektrolyse zum gewinnen von metallen |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6547949B1 (de) |
| EP (1) | EP1230439B1 (de) |
| AT (1) | ATE245211T1 (de) |
| AU (1) | AU775279B2 (de) |
| DE (2) | DE19940699C2 (de) |
| ES (1) | ES2202143T3 (de) |
| PE (1) | PE20010813A1 (de) |
| WO (1) | WO2001016401A1 (de) |
Family Cites Families (5)
| 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 |
-
1999
- 1999-08-27 DE DE19940699A patent/DE19940699C2/de not_active Expired - Fee Related
-
2000
- 2000-05-19 US US09/936,392 patent/US6547949B1/en not_active Expired - Fee Related
- 2000-05-19 DE DE50002936T patent/DE50002936D1/de not_active Expired - Lifetime
- 2000-05-19 WO PCT/EP2000/004524 patent/WO2001016401A1/de not_active Ceased
- 2000-05-19 ES ES00941961T patent/ES2202143T3/es not_active Expired - Lifetime
- 2000-05-19 EP EP00941961A patent/EP1230439B1/de not_active Expired - Lifetime
- 2000-05-19 AU AU56745/00A patent/AU775279B2/en not_active Ceased
- 2000-05-19 AT AT00941961T patent/ATE245211T1/de not_active IP Right Cessation
- 2000-09-20 PE PE2000000975A patent/PE20010813A1/es not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0116401A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US6547949B1 (en) | 2003-04-15 |
| AU775279B2 (en) | 2004-07-29 |
| EP1230439B1 (de) | 2003-07-16 |
| ES2202143T3 (es) | 2004-04-01 |
| DE19940699A1 (de) | 2001-03-08 |
| WO2001016401A1 (de) | 2001-03-08 |
| AU5674500A (en) | 2001-03-26 |
| ATE245211T1 (de) | 2003-08-15 |
| PE20010813A1 (es) | 2001-09-08 |
| DE50002936D1 (de) | 2003-08-21 |
| DE19940699C2 (de) | 2002-02-07 |
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