CA2697396A1 - Control of by-pass current in multi-polar light metal reduction cells - Google Patents
Control of by-pass current in multi-polar light metal reduction cells Download PDFInfo
- Publication number
- CA2697396A1 CA2697396A1 CA2697396A CA2697396A CA2697396A1 CA 2697396 A1 CA2697396 A1 CA 2697396A1 CA 2697396 A CA2697396 A CA 2697396A CA 2697396 A CA2697396 A CA 2697396A CA 2697396 A1 CA2697396 A1 CA 2697396A1
- Authority
- CA
- Canada
- Prior art keywords
- cell
- polar electrode
- polar
- anode
- insulator
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/02—Electrolytic production, recovery or refining of metals by electrolysis of melts of alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/04—Electrolytic production, recovery or refining of metals by electrolysis of melts of magnesium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
-
- 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
- C25C7/005—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells for the electrolysis of melts
-
- 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
- C25C7/04—Diaphragms; Spacing elements
Abstract
The invention relates to a multi-polar reduction cell for production of a light metal by electrolysis. The cell has an anode, a cathode, and at least one current-conducting multi-polar electrode interposed between the anode and the cathode. The cell has a molten electrolyte containing a metal salt to be electrolyzed held within the cell and preferably has means to maintain an upper surface of the electrolyte at a predetermined level within the cell. The level is preferably maintained above the upper end of the multi-polar electrode(s), at least in use of the cell. The multi-polar electrode has an electrically insulating surface at its upper end that minimizes or eliminates by-pass current between the anode and cathode when the cell is operated. The invention also relates to the method of minimizing or eliminating the by-pass current.
Claims (20)
1. A multi-polar electrolytic cell for producing a light metal by electrolysis of a corresponding metal salt, the cell comprising:
a molten electrolyte containing a metal salt that produces a light metal and a gas when electrolyzed; and an arrangement of generally vertical electrodes surrounded by said molten electrolyte, including an anode, a cathode and at least one current-conducting multi-polar electrode interposed between the anode and the cathode, said at least one multi-polar electrode having an upper end;
wherein said at least one multi-polar electrode has an electrical insulator positioned to extend at least partially over said upper end, and wherein, in use of said cell, said insulator is immersed beneath said electrolyte.
a molten electrolyte containing a metal salt that produces a light metal and a gas when electrolyzed; and an arrangement of generally vertical electrodes surrounded by said molten electrolyte, including an anode, a cathode and at least one current-conducting multi-polar electrode interposed between the anode and the cathode, said at least one multi-polar electrode having an upper end;
wherein said at least one multi-polar electrode has an electrical insulator positioned to extend at least partially over said upper end, and wherein, in use of said cell, said insulator is immersed beneath said electrolyte.
2. The cell of claim 1, wherein said insulator is attached to said multi-polar electrode.
3. The cell of claim 2, wherein said insulator is attached to said multi-polar electrode by a fastening means selected from the group consisting of pins, dovetails, interposed members, and adhesive.
4. The cell of any one of claims 1 to 3, wherein said insulator has a width between 0.1 and 1.5 times the width of the multi-polar electrode, a length substantially equal to the length of the multi-polar electrode and a height of 1 to 20 times an electrode gap between adjacent electrodes.
5. The cell of any one of claims 1 to 3, wherein said insulator has a width between 0.5 and 1.0 times the width of the multi-polar electrode, a length substantially equal to the length of the multi-polar electrode and a height of 5 to 10 times an electrode gap between adjacent electrodes.
6. The cell of any one of claims 1 to 5, wherein an insulating refractory shield is provided on the anode at a position confronting said upper end of an adjacent multi-polar electrode.
7. The cell of any one of claims 1 to 6, wherein the anode, cathode and said at least one multi-polar electrode are planar and are arranged parallel to each other.
8. The cell of any one of claims 1 to 6, wherein the cathode and said at least one multi-polar electrode each form a continuous body surrounding the anode.
9. The cell of any one of claims 1 to 6, wherein the cathode and said at least one multi-polar electrode are in the form of hollow cylinders surrounding the anode.
10. The cell of any one of claims 1 to 9, wherein said insulator is made of a material selected from the group consisting of alumina, magnesia, Mg-aluminate spinel, aluminum nitride, silicon nitride and SIALON.
11. A method of minimizing or eliminating by-pass current between and anode and a cathode in a multi-polar electrolysis cell suitable for production of a light metal, said method comprising:
electrically insulating an upper end of at least one multi-polar electrode of said cell, and conducting electrolysis with said insulated upper end maintained below an upper surface of molten electrolyte containing a metal salt to be electrolyzed held within said cell.
electrically insulating an upper end of at least one multi-polar electrode of said cell, and conducting electrolysis with said insulated upper end maintained below an upper surface of molten electrolyte containing a metal salt to be electrolyzed held within said cell.
12. A multi-polar electrolytic cell for producing a light metal by electrolysis of a corresponding metal salt, the cell comprising:
a molten electrolyte containing a metal salt that produces a light metal and a gas when electrolyzed; and an arrangement of generally vertical electrodes surrounded by said molten electrolyte, including an anode, a cathode and a current-conducting multi-polar electrode interposed between the anode and the cathode, said multi-polar electrode having an upper end and an electrical insulator positioned to extend over said upper end;
wherein, in use of said cell, said insulator is immersed beneath said electrolyte.
a molten electrolyte containing a metal salt that produces a light metal and a gas when electrolyzed; and an arrangement of generally vertical electrodes surrounded by said molten electrolyte, including an anode, a cathode and a current-conducting multi-polar electrode interposed between the anode and the cathode, said multi-polar electrode having an upper end and an electrical insulator positioned to extend over said upper end;
wherein, in use of said cell, said insulator is immersed beneath said electrolyte.
13. The cell of claim 12, having at least one other multi-polar electrode interposed between said anode and said cathode.
14. The cell of claim 13, wherein said at least one other multi-polar electrode is provided with an electrical insulator positioned over an upper end thereof.
15. The cell of claim 14, wherein said insulators positioned above said multi-polar electrode and said at least one other multi-polar electrode are interconnected by a spacer made of refractory material.
16. The cell of claim 12, wherein said insulator is attached to said multi-polar electrode.
17. The cell of claim 16, wherein said insulator is attached to said multi-polar electrode by a fastening means selected from the group consisting of pins, dovetails, interposed members, and adhesive.
18. The cell of any one of claims 12 to 17, wherein said insulator has a width between 0.1 and 1.5 times the width of the multi-polar electrode, a length substantially equal to the length of the multi-polar electrode and a height of 5.0 to 10.0 times said width of an electrode gap between adjacent electrodes.
19. The cell of any one of claims 12 to 17, wherein said insulator has a width between 0.5 and 1.0 times the width of the multi-polar electrode, a length substantially equal to the length of the multi-polar electrode and a height of 1.0 to times an electrode gap between adjacent electrodes.
20. The cell of any one of claims 12 to 19, wherein an insulating refractory shield is provided on the anode at a position confronting said upper end of the multi-polar electrode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97246307P | 2007-09-14 | 2007-09-14 | |
| US60/972,463 | 2007-09-14 | ||
| PCT/CA2008/001544 WO2009033260A1 (en) | 2007-09-14 | 2008-09-03 | Control of by-pass current in multi-polar light metal reduction cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2697396A1 true CA2697396A1 (en) | 2009-03-19 |
| CA2697396C CA2697396C (en) | 2011-11-08 |
Family
ID=40451505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2697396A Expired - Fee Related CA2697396C (en) | 2007-09-14 | 2008-09-03 | Control of by-pass current in multi-polar light metal reduction cells |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20100200420A1 (en) |
| CN (1) | CN101802270B (en) |
| AU (1) | AU2008299528B2 (en) |
| CA (1) | CA2697396C (en) |
| NO (1) | NO20100526L (en) |
| RU (1) | RU2010112494A (en) |
| WO (1) | WO2009033260A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206839A (en) * | 2011-06-24 | 2011-10-05 | 遵宝钛业有限公司 | Method for building magnesium electrolytic tank |
| CN104562092B (en) * | 2015-02-03 | 2017-05-10 | 奉新赣锋锂业有限公司 | Multi-anode lithium metal electrolytic bath |
| CN110808354B (en) * | 2019-11-25 | 2022-06-28 | 衡阳凯新特种材料科技有限公司 | Durable silicon nitride electrode protective cover with good insulating property |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2468022A (en) * | 1944-12-21 | 1949-04-26 | Dow Chemical Co | Electrolytic apparatus for producing magnesium |
| US2629688A (en) * | 1950-10-28 | 1953-02-24 | Dow Chemical Co | Electrolytic apparatus for production of magnesium |
| US3396094A (en) * | 1962-10-25 | 1968-08-06 | Canada Aluminum Co | Electrolytic method and apparatus for production of magnesium |
| IL61062A (en) * | 1979-09-27 | 1985-05-31 | Ishizuka Hiroshi | Apparatus for electrolytic production of magnesium metal from its chloride |
| IL64372A0 (en) * | 1980-12-11 | 1982-02-28 | Ishizuka Hiroshi | Electrolytic cell for magnesium chloride |
| JPS58161788A (en) * | 1982-03-16 | 1983-09-26 | Hiroshi Ishizuka | Apparatus and method for electrolysis of mgcl2 |
| IS1264B6 (en) * | 1982-06-14 | 1987-03-27 | Alcan International Limited | Metallurgy with electrolysis of molten electrolyte (ionized solution) |
| US4514269A (en) * | 1982-08-06 | 1985-04-30 | Alcan International Limited | Metal production by electrolysis of a molten electrolyte |
| US4510029A (en) * | 1984-05-18 | 1985-04-09 | Amax Inc. | Molten salt electrostripping cell and method for purifying molten salt electrolytes |
| AU614590B2 (en) * | 1988-03-30 | 1991-09-05 | Toho Titanium Co., Ltd. | Electrolytic cell for recovery of metal |
| JP3812951B2 (en) * | 1995-04-21 | 2006-08-23 | アルキャン・インターナショナル・リミテッド | Multipolar electrolyzer for metal recovery by electrolysis of molten electrolyte |
| WO2000003068A1 (en) * | 1998-07-08 | 2000-01-20 | Alcan International Limited | Molten salt electrolytic cell having metal reservoir |
| US6488760B1 (en) * | 1998-10-13 | 2002-12-03 | The Valspar Corporation | Universal paint tinting concentrates |
| WO2000022050A1 (en) * | 1998-10-13 | 2000-04-20 | The Valspar Corporation | Universal paint tinting concentrates |
| US6337008B1 (en) * | 2000-06-12 | 2002-01-08 | Alcan International Limited | Electrolysis cells |
-
2008
- 2008-09-03 WO PCT/CA2008/001544 patent/WO2009033260A1/en active Application Filing
- 2008-09-03 CN CN2008801071435A patent/CN101802270B/en not_active Expired - Fee Related
- 2008-09-03 AU AU2008299528A patent/AU2008299528B2/en not_active Ceased
- 2008-09-03 CA CA2697396A patent/CA2697396C/en not_active Expired - Fee Related
- 2008-09-03 RU RU2010112494/02A patent/RU2010112494A/en not_active Application Discontinuation
- 2008-09-03 US US12/677,599 patent/US20100200420A1/en not_active Abandoned
-
2010
- 2010-04-14 NO NO20100526A patent/NO20100526L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CN101802270B (en) | 2012-05-30 |
| US20100200420A1 (en) | 2010-08-12 |
| AU2008299528B2 (en) | 2012-02-16 |
| AU2008299528A1 (en) | 2009-03-19 |
| CA2697396C (en) | 2011-11-08 |
| CN101802270A (en) | 2010-08-11 |
| WO2009033260A1 (en) | 2009-03-19 |
| RU2010112494A (en) | 2011-10-20 |
| NO20100526L (en) | 2010-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130904 |