WO2010023101A1 - Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath - Google Patents
Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath Download PDFInfo
- Publication number
- WO2010023101A1 WO2010023101A1 PCT/EP2009/060391 EP2009060391W WO2010023101A1 WO 2010023101 A1 WO2010023101 A1 WO 2010023101A1 EP 2009060391 W EP2009060391 W EP 2009060391W WO 2010023101 A1 WO2010023101 A1 WO 2010023101A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cathode
- cathode sheet
- edge strips
- sheet
- metal
- Prior art date
Links
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
-
- 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
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- 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
- C25C7/06—Operating or servicing
- C25C7/08—Separating of deposited metals from the cathode
Definitions
- the invention relates to a cathode for the electrolytic deposition of zinc, or the like, from an electrolyte bath, which comprises a cathode sheet, a support and contact rail attached to the upper edge of the plate-shaped cathode sheet, which has a higher stability than the cathode sheet, and at the side Has edges and possibly the bottom edge of the cathode sheet attached edge strips,
- metal ions are dissolved in an acid bath of processed material, such as ore, electrolytically and deposited on a cathode, the transport of the metal ions through the acidic electrolyte takes place between Cathode and anode flowing DC,
- Suitable cathodes for this purpose can generally be subdivided into two main components, namely the cathode plate or the cathode sheet, on which or on which the metal to be recovered is deposited, and the part called the contact, support or head rail, which belongs to the Introducing the electric current into the plate-shaped cathode sheet and for mechanically stabilizing and moving the cathode sheet,
- the electrolytic deposition of the zinc to be recovered on the surfaces of cathodes follows the current density distribution between anode and cathode and at the same time protects the cathode sheet from corrosion in the acid bath,
- the cathode sheet can therefore corrode and wear prematurely in the liquid zone, the acidic electrolyte being formed by the deposited zinc.
- edge strips enclose either only the two vertically extending lateral edges of the cathode sheet or the lower, horizontally extending edge,
- cathode in the region of the edge zone of the cathode sheet hindering metal deposits arise. In addition, it may also result in damage to the cathode sheet itself.
- edge zone region of the cathode sheet under the edge strips or also to the solution of the cathode material in the electrolyte.
- edge zone region of the cathode sheet is destroyed under the edge strips.
- the service life of the cathode sheet is thereby reduced.
- the edge strips may lose their hold on the cathode sheet and remain in the electrolyte bath. This can cause significant interference during operation.
- edge strips change their chemical and physical properties when used in acidic electrolyte. As a result, the electrolyte is contaminated with foreign chemicals or other foreign substances. There is also the risk that the edge strips wear out prematurely,
- the invention has for its object to avoid the above-mentioned disadvantages in the electrolytic deposition of metals from an electrolyte bath and, accordingly, to provide a cathode for the deposition of zinc or similar metals, which longer than known cathodes can be used and thus has a longer life,
- the edge strips are not made of electrically insulating material, but of a resistant to the electrolyte metal, but which has a significantly and significantly lower electrical conductivity as the cathode sheet, the deposition of metal ions to the The thickness of the metal layer formed thereby on the edge strips is so small that the subsequent Abschalrea of the recovered zinc or similar metal from the surfaces of the Cathode sheet is not affected,
- the edge strips made of stainless steel or titanium, while the cathode sheet may be an aluminum sheet,
- the metallic edge strips can be securely and permanently attached to the cathode sheet in a suitable manner, for example by riveting, screwing, clamping or welding, so that the above-described disadvantages of the known non-metallic edge strips are avoided,
- inventively provided metallic edge strips can be connected to the cathode sheet with much higher support.
- the metallic edge strips behave inertly with respect to the electrolyte. A change in the chemical or physical structure of the edge strips does not take place with a suitable choice of the metallic material,
- a chemically resistant metal such as stainless steel or titanium
- Derianos metal can be very intimately connected to the cathode sheet, so that a Unteraueren the coating of the cathode sheet is prevented with electrolyte, as metals in general a have higher mechanical strength than plastics, the wear during peeling of the recovered zinc or other metal is reduced to a fraction compared to plastic, the durability and Lifespan of the protection of the cathode is therefore also significantly increased in the area of the liquid zone
- the starting disks also consist of metals resistant to the acid bath or the electrolyte, such as, for example, stainless steel or titanium.
- the metal layer formed on the cathode during the electrolytic deposition takes place in proportion to the conductivities of the metals used for the contact disk and the cathode sheet
- the forming metal layer can be influenced by the electrical transition between the cathode blade and the contact disk.
- a correspondingly thin deposited metal layer on the contact disk does not hinder the function of the blade.
- the impact of the blade on the metal-made starting disks can not damage or destroy the contact disks a much longer service life than known shoulder plates made of plastic
- the shoulder discs are arranged in the region of the electrolyte surface or liquid zone at the cathode, they can be combined with the above-described metallic liquid zone protection and in a Unit to be connected. Liquid zone protection with integrated suction disk also extends the service life of the cathode sheet
- the cathode 1 has an existing example of aluminum sheet cathode sheet 2, which is fixed to a mounting rail 3. This cathode sheet 2 can be hung in the position shown in the drawing in an electrolyte bath, the surface of which is indicated by a dot-dash line 4.
- the support rail 3 is provided with hooks 5 for handling and with contacts for the power input 6,
- edge strips 8 are permanently attached, which consist of metal whose electrical conductivity is much lower than that of the cathode sheet.
- edge strips 8 are permanently attached, which consist of metal whose electrical conductivity is much lower than that of the cathode sheet.
- a further edge strip 9 attached which consists of the same metal as the skirt 8, but this skirt 9 can also be omitted,
- Electrolyte bath (dash-dotted line 4) - one-sided or double-sided - shoulder discs 1 0 made of the same material as the edge strips 8 and 9 attached, which serve to facilitate the attachment of peeling knives,
- a protective layer 1 1 is arranged on the front and the back of the cathode sheet 2, which may consist of the same material as the edge strips 8 and 9 and the approach discs 1 0
- an electrical insulation for example an insulating coating or an insulating intermediate layer, may be provided between the cathode sheet 2 and the edge conductors 8 and 9, which are made of poorly conductive metal and also likewise of poorly conductive starting disks 10 zinc or other metal on these accessories,
- Skirting 8 and 9 is about 50; 1, When using titanium for the skirting and also the lugs, this ratio is much larger, because titanium is a very bad conductor,
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)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09781709A EP2324143A1 (en) | 2008-08-29 | 2009-08-11 | Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath |
CA2738135A CA2738135A1 (en) | 2008-08-29 | 2009-08-11 | Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath |
AU2009286832A AU2009286832A1 (en) | 2008-08-29 | 2009-08-11 | Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810041698 DE102008041698A1 (en) | 2008-08-29 | 2008-08-29 | Cathode for the electrolytic deposition of zinc or the like. From an electrolyte bath |
DE102008041698.3 | 2008-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010023101A1 true WO2010023101A1 (en) | 2010-03-04 |
Family
ID=41353907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/060391 WO2010023101A1 (en) | 2008-08-29 | 2009-08-11 | Cathode for the electrolytic deposition of zinc or the like from an electrolyte bath |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2324143A1 (en) |
AU (1) | AU2009286832A1 (en) |
CA (1) | CA2738135A1 (en) |
DE (1) | DE102008041698A1 (en) |
WO (1) | WO2010023101A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104762640A (en) * | 2015-04-28 | 2015-07-08 | 北京矿冶研究总院 | Electro-deposition metal pre-stripping device |
DE102014003424A1 (en) | 2014-03-04 | 2015-09-10 | VDM Metals GmbH | Cathode for the electrolytic zinc extraction |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA3063437C (en) * | 2016-12-28 | 2023-10-17 | Cecal Tecno Industria E Comercio De Equipamentos Sob Encomenda Ltda. | Side protection for an electrolytic cell cathode for metallic zinc production |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1977499A (en) * | 1932-12-28 | 1934-10-16 | Tetrault Michael | Electrolytic apparatus |
GB2080829A (en) * | 1980-07-26 | 1982-02-10 | Berger Peter | Electrode edge protector, |
US4551219A (en) * | 1984-05-21 | 1985-11-05 | Pfizer Inc. | Flush edge protected metal laminates |
EP0454056A1 (en) * | 1990-04-23 | 1991-10-30 | Austria Metall Aktiengesellschaft | Aluminium cathode-plate for the electrowinning of zinc |
AT403808B (en) * | 1994-09-29 | 1998-05-25 | Austria Metall | Cathode plate for the electrolytic recovery of metals from a liquid electrolyte |
-
2008
- 2008-08-29 DE DE200810041698 patent/DE102008041698A1/en not_active Withdrawn
-
2009
- 2009-08-11 CA CA2738135A patent/CA2738135A1/en not_active Abandoned
- 2009-08-11 AU AU2009286832A patent/AU2009286832A1/en not_active Abandoned
- 2009-08-11 EP EP09781709A patent/EP2324143A1/en not_active Withdrawn
- 2009-08-11 WO PCT/EP2009/060391 patent/WO2010023101A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1977499A (en) * | 1932-12-28 | 1934-10-16 | Tetrault Michael | Electrolytic apparatus |
GB2080829A (en) * | 1980-07-26 | 1982-02-10 | Berger Peter | Electrode edge protector, |
US4551219A (en) * | 1984-05-21 | 1985-11-05 | Pfizer Inc. | Flush edge protected metal laminates |
EP0454056A1 (en) * | 1990-04-23 | 1991-10-30 | Austria Metall Aktiengesellschaft | Aluminium cathode-plate for the electrowinning of zinc |
AT403808B (en) * | 1994-09-29 | 1998-05-25 | Austria Metall | Cathode plate for the electrolytic recovery of metals from a liquid electrolyte |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014003424A1 (en) | 2014-03-04 | 2015-09-10 | VDM Metals GmbH | Cathode for the electrolytic zinc extraction |
DE102014003424B4 (en) * | 2014-03-04 | 2017-04-13 | Vdm Metals International Gmbh | Cathode for the electrolytic zinc extraction |
CN104762640A (en) * | 2015-04-28 | 2015-07-08 | 北京矿冶研究总院 | Electro-deposition metal pre-stripping device |
CN104762640B (en) * | 2015-04-28 | 2017-11-21 | 北京矿冶研究总院 | Electro-deposition metal pre-stripping device |
Also Published As
Publication number | Publication date |
---|---|
DE102008041698A1 (en) | 2010-03-04 |
EP2324143A1 (en) | 2011-05-25 |
AU2009286832A1 (en) | 2010-03-04 |
CA2738135A1 (en) | 2010-03-04 |
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