WO2002090622A2 - Method for repairing electrolysis cathodes - Google Patents
Method for repairing electrolysis cathodes Download PDFInfo
- Publication number
- WO2002090622A2 WO2002090622A2 PCT/DE2002/000890 DE0200890W WO02090622A2 WO 2002090622 A2 WO2002090622 A2 WO 2002090622A2 DE 0200890 W DE0200890 W DE 0200890W WO 02090622 A2 WO02090622 A2 WO 02090622A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting edge
- cross member
- cathode
- electrolysis
- area
- 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
Definitions
- the invention relates to a method for repairing electrolysis cathodes which are connected together with anodes in a galvanic bath to carry out galvanic electrolysis to a power source and which consist of a cross member arranged above the galvanic bath for electrical connection with at least one supply rail and one into the galvanic Bad protruding cathode sheet are made of metal.
- cathodes can be used, for example, in the production of electrolyte copper.
- the anodes consist of impure cast copper plates, which are dissolved in the electrolyte during the electrolysis and whose copper is then deposited as pure copper on the stainless steel plates. Collect the contaminants mainly as soil sludge in the electrolysis bath.
- a typical procedure is carried out in such a way that the cathodes are removed from the galvanic bath about once a week, freed of the copper and used again. After about 3 weeks, the copper anodes have dissolved to such an extent that the copper anodes are replaced.
- the cross member of the cathodes typically consists of a copper-coated support rod in order to ensure a low contact resistance between the cross members and the busbars used for the electrical supply.
- the cathodes can therefore no longer be used to carry out the electrolysis.
- Many thousands of cathodes are used simultaneously in the industrial implementation of galvanic electrolysis for copper deposition.
- the service life of the cathodes is therefore an important cost factor in copper production.
- the object of the present invention is therefore to specify a method of the type mentioned in the introduction in such a way that repaired electrolysis cathodes are provided with a sufficiently long service life.
- This object is achieved in that at least a portion of the cathode sheet is separated from the cross member by a thermally substantially uniform application in the area of a first cut edge, that a replacement sheet is provided at least in the area of its extension which can be turned towards the cross member by a thermally substantially even application a second cut edge is cut and that the replacement sheet is welded to the first cut edge by a thermally substantially uniform application in the region of the second cut edge.
- the provided first cutting edge can be one without any further processing subsequent welding process. This avoids any additional thermal and mechanical loads during an additional processing step.
- Separation process can be achieved in that the used cathode sheet is separated from the cross member with a laser in the region of the first cutting edge.
- the replacement plate is cut with a laser at least in the area of its extension that can be turned towards the cross member in order to provide the second cutting edge.
- a uniform weld seam and uniform heat dissipation can also be supported in that the components to be connected to one another are aligned parallel to one another before the welding process is carried out.
- the first cut edge be clamped relative to the second cut edge while the welding process is being carried out.
- cross-sectional reductions in the area of the weld seam and resulting increases in electrical resistance can be avoided by producing an overlap between the weld seam and the root in the area of the weld seam.
- 1 is a side view of an electrolysis cathode
- Fig. 2. is a side view in viewing direction II in Fig. L
- FIG. 3 is an enlarged view of detail III in Fig. 2,
- FIG. 5 is a perspective view of the electrolysis cathode of FIG. 1,
- Fig. 6 shows a cross section through a
- Electrolysis cathode which is clamped in the area of a welding device and which is provided with a new cathode sheet and
- Fig. 7 is an enlarged cross-sectional view in the area of the weld.
- Fig. 1 shows an electrolysis cathode (1) which is provided with a cross member (2) and a cathode plate (3).
- the cathode sheet (3) is made of stainless steel and is welded to the cross member (2).
- the cross member (2) is preferably designed as a copper-coated support rod.
- the cathode sheet (3) is provided with insulating rails (6, 7) in the region of side edges (4, 5).
- the insulating rails (6, 7) can be designed as plastic strips.
- the cathode sheet (3) has recesses through which fastening elements extend.
- the cross member (2) projects over the insulating rails (6, 7) with end segments (8, 9). As a result, the electrolysis cathode (1) can be suspended in the region of an electrolysis bath, not shown.
- Fig. 1 shows an electrolysis cathode (1), in which an original cathode sheet (3) was separated and replaced by a new sheet. As a result, a weld seam (10) runs from the side edge (4) to the side edge (5).
- the electrolysis cathode (1) has two recesses (11, 12) below the cross member (2), through which holding devices of a transport device can be inserted.
- the positioning of the weld seam (10) at a distance below the recesses (11, 12) has the advantage that the welding process can be carried out in one operation without having to re-attach the welding electrode.
- the weld seam (10) should run at the level of the lower boundaries of the recesses (11, 12).
- the welding electrode has to be applied three times, but the distance of the weld seam from the surface of the electrolyte after insertion into the electrolysis bath can be increased as a result.
- the actual length of the weld seam is reduced by the expansion of the recesses (11, 12).
- FIG. 2 illustrates that the cross member (2) can be designed as an I-profile.
- the insulating rails (6,7) cover essentially the entire area of the side edges (4, 5).
- Fig. 4 shows a cross section through one of the end segments (8, 9). It can be seen that a lower region of the end segments (8, 9) is designed as a taper (14). As a result, when the end segments (8, 9) rest on a busbar (15), a high contact pressure per unit area and thus a low contact resistance for an electric current is achieved.
- FIG. 5 illustrates the structure of the electrolysis cathode (1) again through the perspective illustration.
- the stable design of the cross member (2) and the lateral protrusion of the end segments (8, 9) of the cross member (2) can be seen.
- FIG. 6 illustrates the arrangement of the electrolysis cathode (1) in the area of a welding device (25) for producing the weld seam (10).
- Both the new cathode sheet (3) and the cross member (2) with a remaining segment (16) of the original cathode sheet (3) are held by clamping devices (17, 18) and subjected to clamping forces (19, 20, 21, 22).
- a transverse force (24) is generated by a pushing device (23), which brings the new cathode sheet (3) and the remaining segment (16) together with a defined surface pressure.
- the welding device (25) is moved along the weld seam (10) to be produced.
- the structure of the weld seam (10) can be seen in detail in FIG. 7.
- the weld seam (10) has a seam root (26) and a seam cover (27) which run in the region of opposite sides of the electrolysis cathode (1).
- the seam root (26) and the seam cover (27) are connected to one another by a welded structure (28) which runs between a first cut edge (29) of the remaining segment (16) and a second cut edge (30) of the new cathode sheet (3).
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 (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002446644A CA2446644C (en) | 2001-05-08 | 2002-03-14 | Method for repairing electrolysis cathodes |
AT02729785T ATE500357T1 (en) | 2001-05-08 | 2002-03-14 | METHOD FOR REPAIRING ELECTROLYSIS CATHODES |
DE50214932T DE50214932D1 (en) | 2001-05-08 | 2002-03-14 | METHOD FOR REPAIRING ELECTROLYSIS CATHODES |
EP02729785A EP1386024B1 (en) | 2001-05-08 | 2002-03-14 | Method for repairing electrolysis cathodes |
AU2002302306A AU2002302306B2 (en) | 2001-05-08 | 2002-03-14 | Method for repairing electrolysis cathodes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10122326A DE10122326A1 (en) | 2001-05-08 | 2001-05-08 | Process for repairing electrolysis cathodes |
DE10122326.9 | 2001-05-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002090622A2 true WO2002090622A2 (en) | 2002-11-14 |
WO2002090622A3 WO2002090622A3 (en) | 2003-05-08 |
Family
ID=7684027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000890 WO2002090622A2 (en) | 2001-05-08 | 2002-03-14 | Method for repairing electrolysis cathodes |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1386024B1 (en) |
AT (1) | ATE500357T1 (en) |
AU (1) | AU2002302306B2 (en) |
CA (1) | CA2446644C (en) |
DE (2) | DE10122326A1 (en) |
ES (1) | ES2359552T3 (en) |
WO (1) | WO2002090622A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016209575A1 (en) * | 2015-06-25 | 2016-12-29 | Ge-Hitachi Nuclear Energy Americas Llc | Nuclear fuel structure and method of making a nuclear fuel structure using a detachable cathode material |
NO20161170A1 (en) * | 2016-07-13 | 2018-01-15 | Norsk Hydro As | Electrolysis cell and a method for repairing same |
CN114574906A (en) * | 2022-04-15 | 2022-06-03 | 昆明冶金研究院有限公司 | Zinc electrodeposition cathode plate aluminum integral beam and preparation method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241433A1 (en) * | 1992-12-09 | 1994-06-16 | Hampel Heinrich | Permanent electrode, used for copper refining by electrolysing - has a cross beam with a bonded plate on one side to carry the electrode plate, the electrode is simple to produce, has improved current transfer and a longer working life |
US5454925A (en) * | 1994-05-03 | 1995-10-03 | Eltech Systems Corporation | Repair of mesh electrode spaced from electrode pan |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU599952A1 (en) * | 1974-06-21 | 1978-03-30 | Ryaguzov Vasilij N | Method of repairing anode posts of aluminium electrolyzers by welding |
JP2615863B2 (en) * | 1988-06-20 | 1997-06-04 | 三菱マテリアル株式会社 | Cathode plate for electrolysis |
-
2001
- 2001-05-08 DE DE10122326A patent/DE10122326A1/en not_active Ceased
-
2002
- 2002-03-14 AT AT02729785T patent/ATE500357T1/en active
- 2002-03-14 WO PCT/DE2002/000890 patent/WO2002090622A2/en not_active Application Discontinuation
- 2002-03-14 CA CA002446644A patent/CA2446644C/en not_active Expired - Fee Related
- 2002-03-14 ES ES02729785T patent/ES2359552T3/en not_active Expired - Lifetime
- 2002-03-14 EP EP02729785A patent/EP1386024B1/en not_active Expired - Lifetime
- 2002-03-14 AU AU2002302306A patent/AU2002302306B2/en not_active Ceased
- 2002-03-14 DE DE50214932T patent/DE50214932D1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241433A1 (en) * | 1992-12-09 | 1994-06-16 | Hampel Heinrich | Permanent electrode, used for copper refining by electrolysing - has a cross beam with a bonded plate on one side to carry the electrode plate, the electrode is simple to produce, has improved current transfer and a longer working life |
US5454925A (en) * | 1994-05-03 | 1995-10-03 | Eltech Systems Corporation | Repair of mesh electrode spaced from electrode pan |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 123 (C-0698), 8. März 1990 (1990-03-08) & JP 01 319695 A (MITSUBISHI METAL CORP), 25. Dezember 1989 (1989-12-25) * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016209575A1 (en) * | 2015-06-25 | 2016-12-29 | Ge-Hitachi Nuclear Energy Americas Llc | Nuclear fuel structure and method of making a nuclear fuel structure using a detachable cathode material |
US10221499B2 (en) | 2015-06-25 | 2019-03-05 | Ge-Hitachi Nuclear Energy Americas Llc | Nuclear fuel structure and method of making a nuclear fuel structure using a detachable cathode material |
EP4075448A1 (en) * | 2015-06-25 | 2022-10-19 | Ge-Hitachi Nuclear Energy Americas LLC | Method of manufacturing a cathode plate and cathode basket assembly |
NO20161170A1 (en) * | 2016-07-13 | 2018-01-15 | Norsk Hydro As | Electrolysis cell and a method for repairing same |
CN114574906A (en) * | 2022-04-15 | 2022-06-03 | 昆明冶金研究院有限公司 | Zinc electrodeposition cathode plate aluminum integral beam and preparation method thereof |
CN114574906B (en) * | 2022-04-15 | 2024-04-26 | 昆明冶金研究院有限公司 | Zinc electrodeposited cathode plate aluminum integral cross beam and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
ES2359552T3 (en) | 2011-05-24 |
EP1386024B1 (en) | 2011-03-02 |
AU2002302306B2 (en) | 2007-08-23 |
CA2446644C (en) | 2009-04-14 |
WO2002090622A3 (en) | 2003-05-08 |
ATE500357T1 (en) | 2011-03-15 |
EP1386024A2 (en) | 2004-02-04 |
DE50214932D1 (en) | 2011-04-14 |
CA2446644A1 (en) | 2002-11-14 |
DE10122326A1 (en) | 2002-11-14 |
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