EP0753604B1 - Anode zur elektrolytischen Gewinnung von Metallen - Google Patents
Anode zur elektrolytischen Gewinnung von Metallen Download PDFInfo
- Publication number
- EP0753604B1 EP0753604B1 EP96111010A EP96111010A EP0753604B1 EP 0753604 B1 EP0753604 B1 EP 0753604B1 EP 96111010 A EP96111010 A EP 96111010A EP 96111010 A EP96111010 A EP 96111010A EP 0753604 B1 EP0753604 B1 EP 0753604B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- electrolyte
- copper
- metal
- titanium
- 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
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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
- C25C7/02—Electrodes; Connections thereof
Definitions
- the invention relates to an anode for electrolysis Extraction of a metal from a ionogenic metal containing electrolytes, with the application of a DC electrical voltage between the anode and one or two at a distance of 10 to 100 mm from the anode in the electrolyte arranged flat cathode or cathodes the metal on the Cathode is deposited and the anode is an in essential horizontal power supply Carrier rail located outside the electrolyte and with the mounting rail two grid-like, at least half in Electrolytes are essentially parallel Metal surfaces (anode grid) are electrically connected.
- the anode is particularly intended for the extraction of copper.
- An anode of this type is known from DE-C-37 31 510. Current densities in the range of 600 to 1200 A / m 2 are used for copper extraction. Perforated or lattice-like anodes are also known from U.S. Patents 3,915,834 and 4,113,586. The breakthroughs in the anode surface are said to reduce disturbances due to gas development and to even out the current distribution in the electrolyte.
- FR-A-2560223 describes anodes with grid-shaped anode surfaces and current conductor rods with a Cu core and a Ti jacket. Parallel anode grids, which are spaced apart by spring elements, are described in GB-A-2001102.
- the invention has for its object an anode for high and to create the highest current densities so that with it equipped electrolysis high metal separation performance can provide. At the same time, malfunctions are said to occur in the anode avoided as much as possible by gas evolution. According to the invention this succeeds with the anode with the Claim 1 combination of features.
- Power is supplied to the anode from the outside via the Copper conductors and from there via one or more copper rods as well as their titanium jacket on the anode grid. Thereby can carry high currents of several 1000 A to the anode grid be directed.
- the partitions For a mechanically stable anode structure provide the partitions that fill the space between the anode grids divide, the partitions also ensure the guidance of the rising gas bubbles.
- the area of the two anode grids, which is intended for immersion in the electrolyte have a height of at least 1 m.
- the area of the associated cathodes can be made correspondingly large, which improves the separation performance.
- the titanium sheath surrounding the bars protects against the corrosion attack of the electrolyte.
- the copper rod pressed into the titanium sheath during manufacture of the sheathing To do this, it is recommended to use elevated temperatures in the range of 400 to 700 ° C apply.
- the simultaneous production of the Copper rods with the associated titanium sheath can in itself known way e.g. by composite extrusion or other Way.
- the electrolysis container (1) of FIG. 1 has an inlet (2) for the electrolyte and a drain (3). Partially immersed in the electrolyte bath (4) are in the container (1) successively arranged cathodes (K) and anodes (A). Each Cathode and each anode is with a horizontal one Carrier rail (6) equipped, cf. also Fig. 2, by the an external DC voltage source (not shown) Current is conducted to the electrode.
- the mounting rail (6) of the Anode according to the invention has a copper conductor (6a) inside on, which is shown in Fig. 4. To protect against corrosion the mounting rail (6) is surrounded by a cover made of titanium sheet, which is not shown in detail.
- each anode (A) two parallel metal grids, here as anode grids (7) and (8). It can be Act expanded metal mesh, but it is also possible to Lattice structure through a dense arrangement of holes in one Manufacture metal surface.
- the anode grid (7) and (8) consist of titanium, which is used for activation in itself known manner with mixed oxides based on Ru and / or Ir is coated. With the inside of the anode grid (7) and (8) are titanium sheets (10), (11), (12) and (13) through Spot welding connected. These are titanium sheets (10) to (13) again with the titanium jacket (15) (see FIGS. 3 and 5) welded, which surrounds the copper rods (16).
- the distance between the two anode grids (7) and (8) is usually 20 to 80 mm.
- the edge area (7a) and (8a) of the Anode grid is angled, cf. Fig. 3, and the two Anode grids are connected there, what the arrangement gives additional stability.
- the titanium sheets (10) to (13) are, as Fig. 3 shows, somewhat curved and act like elastic Springs holding the anode grid (7) and (8) with light pressure tell apart.
- Partitions (25) and (26) are e.g. also made of titanium sheet.
- the walls (25) and (26) are with the Titanium jacket of the copper rod (16) welded and also with the bent edge regions (7a) and (8a) of the anode grid (7) and (8) electrically connected. This makes them work Partitions (25) and (26) mechanically stabilizing, conduct Strcm from the copper rod (16) to the edge areas (7a) and (8a) the anode grid and also act as a guide for the rising gas bubbles.
- 1 is the better one Clarity because of the partition (25) only with an anode (A) shown.
- each anode leaves no gas bubbles significant disability rise and that Leave the electrolysis bath (4). This is especially true at high Current densities are of great importance because of the increased gas formation disturbs the movement of the ions in the electrolyte and the Can locally reduce ion concentration.
- FIG. 4 shows an enlarged view of how the copper conductor (6a) the mounting rail (6) with a copper rod (16) Screwing is connected.
- the screw (20) with its thread in a threaded blind hole (21) at the upper end of the copper rod (16).
- the surfaces pressed against each other (22) on the copper conductor (6a) and on the front end of the copper rod (16) are serrated or otherwise roughened to the ohmic To keep the resistance at the current transition low.
- the titanium sheath (15) surrounding the copper rod (16) omitted for clarity.
- the cross-sectional area of the Copper rods don't necessarily have to be circular, it is e.g. a rectangular or oval shape possible.
- For the titanium sheath (15) usually have wall thicknesses in the range of 0.2 up to 1 mm in question.
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)
Description
- Fig. 1
- eine Metallgewinnungs-Elektrolyse im Längsschnitt in schematischer Darstellung,
- Fig. 2
- eine Anode im Längsschnitt, geschnitten nach der Linie II-II in Fig. 3,
- Fig. 3
- einen Querschnitt durch die Anode der Fig. 2, geschnitten nach der Linie III-III,
- Fig. 4
- die Verbindung zwischen der Tragschiene und einem Kupferstab im Längsschnitt und
- Fig. 5
- einen Querschnitt durch einen Kupferstab mit Titan-Mantel.
Claims (3)
- Anode für die Elektrolyse zur Gewinnung eines Metalls aus einem das Metall ionogen enthaltenden Elektrolyten, wobei unter Anlegen einer elektrischen Gleichspannung zwischen der Anode und einer oder zwei im Abstand von 10 bis 100 mm von der Anode im Elektrolyten angeordneten flächigen Kathode oder Kathoden das Metall an der Kathode abgeschieden wird, wobei die Anode eine im wesentlichen horizontale, der Stromzuführung dienende, außerhalb des Elektrolyten befindliche Tragschiene aufweist und mit der Tragschiene zwei gitterartige, mindestens zur Hälfte im Elektrolyten befindliche, im wesentlichen parallele Metallflächen (Anodengitter) elektrisch leitend verbunden sind, wobei die Tragschiene einen Kupferleiter aufweist und mit dem Kupferleiter mindestens ein vertikaler Kupferstab verbunden ist, wobei zwischen dem Kupferleiter und dem Kupferstab ein direkter Stromübergang besteht, der Kupferstab von einem Mantel (15) aus Titan umhüllt ist und der Kupferstab im Mantel eingepreßt sitzt, wobei die beiden Anodengitter (7, 8) mit dem Titan-Mantel des Kupferstabs durch Federelemente (10, 11, 12, 13) aus Titanblech elektrisch leitend verbunden sind und der Raum zwischen den beiden Anodengittern durch mindestens zwei vertikale Metallbleche (25, 26) geteilt ist, wobei jedes Metallblech mit dem Titan-Mantel und jeweils einem Randbereich (7a, 8a) der Anodengitter verbunden ist.
- Anode nach Anspruch 1, dadurch gekennzeichnet, daß die Fläche der beiden Anodengitter, die für das Eintauchen in den Elektrolyten vorgesehen ist, eine Höhe von mindestens 1 m aufweist.
- Anode nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kupferleiter der Tragschiene mit dem vertikalen Kupferstab verschraubt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19525360A DE19525360A1 (de) | 1995-07-12 | 1995-07-12 | Anode zur elektrolytischen Gewinnung von Metallen |
DE19525360 | 1995-07-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0753604A1 EP0753604A1 (de) | 1997-01-15 |
EP0753604B1 true EP0753604B1 (de) | 2000-06-14 |
Family
ID=7766624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96111010A Expired - Lifetime EP0753604B1 (de) | 1995-07-12 | 1996-07-09 | Anode zur elektrolytischen Gewinnung von Metallen |
Country Status (5)
Country | Link |
---|---|
US (1) | US5679240A (de) |
EP (1) | EP0753604B1 (de) |
AU (1) | AU704628B2 (de) |
DE (2) | DE19525360A1 (de) |
PE (1) | PE11797A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100296374B1 (ko) * | 1998-12-17 | 2001-10-26 | 장인순 | 방사성폐기물드럼내오염토양을동전기적방법으로제염하는방법과장치 |
KR20010073752A (ko) * | 2000-01-20 | 2001-08-03 | 마대열 | 전기이온도금용 부스바의 제조방법 |
DE102004008813B3 (de) * | 2004-02-20 | 2005-12-01 | Outokumpu Oyj | Verfahren und Anlage zum elektrochemischen Abscheiden von Kupfer |
US8038855B2 (en) | 2009-04-29 | 2011-10-18 | Freeport-Mcmoran Corporation | Anode structure for copper electrowinning |
US9150974B2 (en) | 2011-02-16 | 2015-10-06 | Freeport Minerals Corporation | Anode assembly, system including the assembly, and method of using same |
US20120231574A1 (en) * | 2011-03-12 | 2012-09-13 | Jiaxiong Wang | Continuous Electroplating Apparatus with Assembled Modular Sections for Fabrications of Thin Film Solar Cells |
ITUB20152450A1 (it) * | 2015-07-24 | 2017-01-24 | Industrie De Nora Spa | Apparato elettrodico per elettrodeposizione di metalli non ferrosi |
ES2580552B1 (es) * | 2016-04-29 | 2017-05-31 | Industrie De Nora S.P.A. | Ánodo seguro para celda electroquímica. |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4134806A (en) * | 1973-01-29 | 1979-01-16 | Diamond Shamrock Technologies, S.A. | Metal anodes with reduced anodic surface and high current density and their use in electrowinning processes with low cathodic current density |
IT1114623B (it) * | 1977-07-01 | 1986-01-27 | Oronzio De Nora Impianti | Cella elettrolitica monopolare a diaframma |
US4391695A (en) * | 1981-02-03 | 1983-07-05 | Conradty Gmbh Metallelektroden Kg | Coated metal anode or the electrolytic recovery of metals |
DE3209138A1 (de) * | 1982-03-12 | 1983-09-15 | Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach | Beschichtete ventilmetallanode zur elektrolytischen gewinnung von metallen oder metalloxiden |
DE3406797C2 (de) * | 1984-02-24 | 1985-12-19 | Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach | Beschichtete Ventilmetallanode zur elektrolytischen Gewinnung von Metallen oder Metalloxiden |
DE3421480A1 (de) * | 1984-06-08 | 1985-12-12 | Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach | Beschichtete ventilmetall-elektrode zur elektrolytischen galvanisierung |
-
1995
- 1995-07-12 DE DE19525360A patent/DE19525360A1/de not_active Withdrawn
-
1996
- 1996-07-01 PE PE1996000498A patent/PE11797A1/es not_active Application Discontinuation
- 1996-07-09 DE DE59605429T patent/DE59605429D1/de not_active Expired - Fee Related
- 1996-07-09 EP EP96111010A patent/EP0753604B1/de not_active Expired - Lifetime
- 1996-07-10 AU AU59448/96A patent/AU704628B2/en not_active Ceased
- 1996-07-11 US US08/679,683 patent/US5679240A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0753604A1 (de) | 1997-01-15 |
AU704628B2 (en) | 1999-04-29 |
MX9602725A (es) | 1997-09-30 |
DE19525360A1 (de) | 1997-01-16 |
US5679240A (en) | 1997-10-21 |
DE59605429D1 (de) | 2000-07-20 |
PE11797A1 (es) | 1997-04-19 |
AU5944896A (en) | 1997-01-23 |
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