CA2630912A1 - A method and a device in connection with handling covers in a superstructure in an electrolytic cell - Google Patents
A method and a device in connection with handling covers in a superstructure in an electrolytic cell Download PDFInfo
- Publication number
- CA2630912A1 CA2630912A1 CA002630912A CA2630912A CA2630912A1 CA 2630912 A1 CA2630912 A1 CA 2630912A1 CA 002630912 A CA002630912 A CA 002630912A CA 2630912 A CA2630912 A CA 2630912A CA 2630912 A1 CA2630912 A1 CA 2630912A1
- Authority
- CA
- Canada
- Prior art keywords
- covers
- accordance
- cell
- cover
- sideways
- 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.)
- Abandoned
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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
- 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
- C25C3/22—Collecting emitted gases
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Electrolytic Production Of Metals (AREA)
- Prevention Of Electric Corrosion (AREA)
- Arc Welding In General (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The present invention concerns a method and device in connection with an electrolytic cell of the Hall-Heroult type for the production of aluminium.
The method relates to the handling of covers in a superstructure in an electrolytic cell, whereby the cell comprises one or more removable covers mounted side by side. Such covers are removed in connection with operations on the cell and are put back into position when the operations have been completed. In connection with the method in accordance with the present invention, the covers are removed by the total sideways extent of the covers being reduced by the covers being moved together sideways before they are lifted off. The device in accordance with the present invention relates to covering the electrolytic cell, whereby at least one cover is designed with at least one side edge that overlaps an adjacent fixed or movable cover and is mounted with a mutual sideways clearance from the fixed or movable cover stated to allow a certain mutual sideways movement between the covers.
The method relates to the handling of covers in a superstructure in an electrolytic cell, whereby the cell comprises one or more removable covers mounted side by side. Such covers are removed in connection with operations on the cell and are put back into position when the operations have been completed. In connection with the method in accordance with the present invention, the covers are removed by the total sideways extent of the covers being reduced by the covers being moved together sideways before they are lifted off. The device in accordance with the present invention relates to covering the electrolytic cell, whereby at least one cover is designed with at least one side edge that overlaps an adjacent fixed or movable cover and is mounted with a mutual sideways clearance from the fixed or movable cover stated to allow a certain mutual sideways movement between the covers.
Description
A method and-a device in connection with handling covers in a superstructure in an electrolytic cell.
The present invention concerns a method and a device for enclosing an electrolytic cell of the Hall-Heroult type for the production of aluminium, whereby process gases developed during the electrolysis process are prevented from flowing out into the cell's ambient air and maintenance on the cell is not prevented unnecessarily.
Covering the superstructure of electrolytic cells of the Hall-Heroult type to collect and remove process gases in a controlled manner is a prior art process.
The applicant's own US patent, US 6,790,337, concerns a cell with a superstructure that can have one or more removable covers. Such covers are normally arranged in such a way that they cover the long sides of the superstructure by several covers being mounted side by side on a frame structure.
With the present invention, a new solution has been developed for removable covers for electrolytic cells based on the covers overlapping in order a) to achieve befter enclosure and b) to make the covers easier to handle for removal and application. Such handling can be performed using a crane or similar with a manipulator arm designed to change anodes or perform other operations on the electrolytic cell. The principle in accordance with the present invention may be used both for single anode changes (changing one anode) and double anode changes (changing two anodes).
These and other advantages may be achieved with the invention as it is defined in the attached claims.
The present invention will be described in further detail in the following using figures and examples, where:
Fig. 1 shows a section of a superstructure of an electrolytic cell seen from the side.
Fig. 2 shows a partial section of the superstructure shown in Fig. 1, seen from the end.
Fig. 3 shows how the covers are designed, positioned and removed for double anode changes in a partial section B-B of a superstructure (seen from above).
The present invention concerns a method and a device for enclosing an electrolytic cell of the Hall-Heroult type for the production of aluminium, whereby process gases developed during the electrolysis process are prevented from flowing out into the cell's ambient air and maintenance on the cell is not prevented unnecessarily.
Covering the superstructure of electrolytic cells of the Hall-Heroult type to collect and remove process gases in a controlled manner is a prior art process.
The applicant's own US patent, US 6,790,337, concerns a cell with a superstructure that can have one or more removable covers. Such covers are normally arranged in such a way that they cover the long sides of the superstructure by several covers being mounted side by side on a frame structure.
With the present invention, a new solution has been developed for removable covers for electrolytic cells based on the covers overlapping in order a) to achieve befter enclosure and b) to make the covers easier to handle for removal and application. Such handling can be performed using a crane or similar with a manipulator arm designed to change anodes or perform other operations on the electrolytic cell. The principle in accordance with the present invention may be used both for single anode changes (changing one anode) and double anode changes (changing two anodes).
These and other advantages may be achieved with the invention as it is defined in the attached claims.
The present invention will be described in further detail in the following using figures and examples, where:
Fig. 1 shows a section of a superstructure of an electrolytic cell seen from the side.
Fig. 2 shows a partial section of the superstructure shown in Fig. 1, seen from the end.
Fig. 3 shows how the covers are designed, positioned and removed for double anode changes in a partial section B-B of a superstructure (seen from above).
Fig. 4 shows how the covers are designed, positioned and removed for single anode changes in a partial section B-B of a superstructure (seen from above).
Fig. 1 shows a section of a superstructure 1 in which several anode blocks 2 are suspended by means of an anode suspender 3. The anode suspender is fixed with a clamp 4 to an anode beam 5 in conventional manner. In this case, some of the covers have been removed, while covers 6, 7 and 8 are mounted on the superstructure.
Fig. 2 shows a partial section of the superstructure shown in Fig. 1, seen from the end. An anode block 2 is suspended from an anode suspender 3 and a cover 6 rests against a frame structure in the superstructure.
As Figs. 3 and 4 show, one set of covers on each side of the electrolytic cell consists of top covers 10, 12, 14, 20, 22 and 24 and bottom covers 11, 13, 19, 21, 23 and 25 with equal or different widths that overlap each other, thus creating a tight connection between the covers when they are positioned on the cell. At the same time, this overlapping is such that the seal is maintained even if the covers are pushed together or pulled apart within a given length. The covers next to the corner covers are always top covers.
When changing anodes, whether a double change of anodes 15 and 16 or anodes 17 and 18 (see Fig. 3) or a single change of anodes 27, 28, 29 and 30 (see Fig. 4), one bottom cover and two top covers must always be removed. They will always lie so that the bottom cover is in the middle, with one top cover on each side. See Figs. 3 and 4. In this way, there will always be a bottom cover left on the cell on each side of the three covers that are removed. The three covers that are removed can thus be lifted right off.
The overlapping is designed so that the covers can be pushed together manually or using a cover gripper mounted on the crane in order to achieve a better position against the covers still in position on the cell when the covers removed are to be put back into position. The width of the overlap and nominal clearance A (see Fig. 4) between the covers determine how far the covers may be pushed together without losing the sealing function.
This principle of pushing the covers together in connection with crane-operated changes is important as it results in greater clearance for the covers that are left on the cell during the operation, with the result that less accuracy is required for the crane operation when the covers are put back into position. After they have been placed in position, they are pushed apart.
The handling of the cover(s) stated may be performed with the assistance of a positioning system. Such a positioning system may be based on distance measurement using a laser or similar between at least one point on the manipulator arm and one or more reference points that are preferably mounted on the cell. Such systems belong to the prior art and will, therefore, not be described in further detail here.
The advantages of the present invention are:
- Simplified operation of covers with a gripper mechanism mounted on a manipulator arm on a crane or a vehicle as the covers are pulled together prior to being lifted out so that the gap between the covers left on the cell is wider. This means that lower accuracy is required for positioning/handling when covers are removed and put back.
- Improved enclosure as the gap between neighbouring covers is replaced with overlapping covers (labyrinth seal).
- The solution is suitable for both remote-controlled handling using a gripper mechanism on a crane or a vehicle and manual operation by an operator on a hall floor.
Fig. 1 shows a section of a superstructure 1 in which several anode blocks 2 are suspended by means of an anode suspender 3. The anode suspender is fixed with a clamp 4 to an anode beam 5 in conventional manner. In this case, some of the covers have been removed, while covers 6, 7 and 8 are mounted on the superstructure.
Fig. 2 shows a partial section of the superstructure shown in Fig. 1, seen from the end. An anode block 2 is suspended from an anode suspender 3 and a cover 6 rests against a frame structure in the superstructure.
As Figs. 3 and 4 show, one set of covers on each side of the electrolytic cell consists of top covers 10, 12, 14, 20, 22 and 24 and bottom covers 11, 13, 19, 21, 23 and 25 with equal or different widths that overlap each other, thus creating a tight connection between the covers when they are positioned on the cell. At the same time, this overlapping is such that the seal is maintained even if the covers are pushed together or pulled apart within a given length. The covers next to the corner covers are always top covers.
When changing anodes, whether a double change of anodes 15 and 16 or anodes 17 and 18 (see Fig. 3) or a single change of anodes 27, 28, 29 and 30 (see Fig. 4), one bottom cover and two top covers must always be removed. They will always lie so that the bottom cover is in the middle, with one top cover on each side. See Figs. 3 and 4. In this way, there will always be a bottom cover left on the cell on each side of the three covers that are removed. The three covers that are removed can thus be lifted right off.
The overlapping is designed so that the covers can be pushed together manually or using a cover gripper mounted on the crane in order to achieve a better position against the covers still in position on the cell when the covers removed are to be put back into position. The width of the overlap and nominal clearance A (see Fig. 4) between the covers determine how far the covers may be pushed together without losing the sealing function.
This principle of pushing the covers together in connection with crane-operated changes is important as it results in greater clearance for the covers that are left on the cell during the operation, with the result that less accuracy is required for the crane operation when the covers are put back into position. After they have been placed in position, they are pushed apart.
The handling of the cover(s) stated may be performed with the assistance of a positioning system. Such a positioning system may be based on distance measurement using a laser or similar between at least one point on the manipulator arm and one or more reference points that are preferably mounted on the cell. Such systems belong to the prior art and will, therefore, not be described in further detail here.
The advantages of the present invention are:
- Simplified operation of covers with a gripper mechanism mounted on a manipulator arm on a crane or a vehicle as the covers are pulled together prior to being lifted out so that the gap between the covers left on the cell is wider. This means that lower accuracy is required for positioning/handling when covers are removed and put back.
- Improved enclosure as the gap between neighbouring covers is replaced with overlapping covers (labyrinth seal).
- The solution is suitable for both remote-controlled handling using a gripper mechanism on a crane or a vehicle and manual operation by an operator on a hall floor.
Claims (12)
1. A method in connection with handling covers in a superstructure in an electrolytic cell, whereby the cell comprises one or more removable covers mounted side by side, the covers are removed in connection with operations on the cell and are put back into position when the operations have been completed, characterised in that when the covers are removed, the total sideways extent of the covers is reduced initially by the covers being moved together sideways before they are lifted off.
2. A method in accordance with claim 1, characterised in that when the covers are put back into position, they are held in such a way that their total sideways extent is less than when they are back in the cell's superstructure as the covers are spread out sideways after they have been mounted in the superstructure.
3. A method in accordance with claim 1, characterised in that at least one of the removable covers is designed for handling by a manipulator arm on a crane, a wheeled vehicle or similar.
4. A method in accordance with claim 3, characterised in that the handling of the cover(s) stated is performed with the assistance of a positioning system.
5. A method in accordance with claim 4, characterised in that the positioning system is based on distance measurement using a laser or similar between at least one point on the manipulator arm and one or more reference points that are preferably mounted on the cell.
6. A device in connection with covering an electrolytic cell of the Hall-Héroult type, whereby the cell comprises one or more removable covers mounted side by side, the covers may be removed in connection with operations on the cell and are put back into position when the operations have been completed, characterised in that at least one cover is designed with at least one side edge that overlaps an adjacent fixed or movable cover and is mounted with a mutual sideways clearance (A) from the fixed or movable cover stated to allow a certain mutual sideways movement between the covers.
7. A device in accordance with claim 6, characterised in that the covers' side edges are designed so that at least one side edge of a cover has an underlying flange, while the other adjacent cover's side edge has an overlying flange.
8. A device in accordance with claim 6, characterised in that the movable covers are equipped with at least one ring, a handle or similar for handling them.
9. A device in accordance with claim 6, characterised in that a heat-resistant seal is mounted between the covers stated.
10. A device in accordance with claim 6, characterised in that the cover(s) is(are) made of aluminium or an aluminium alloy.
11. A device in accordance with claim 6, characterised in that the cover(s) is(are) equipped with steps.
12. A device in accordance with claim 6, characterised in that the seal between the covers is a labyrinth seal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20055865 | 2005-12-09 | ||
| NO20055865A NO328467B1 (en) | 2005-12-09 | 2005-12-09 | Method and apparatus for encapsulating an electrolysis cell |
| PCT/NO2006/000431 WO2007067061A1 (en) | 2005-12-09 | 2006-11-24 | A method and a device in connection with handling covers in a superstructure in an electrolytic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2630912A1 true CA2630912A1 (en) | 2007-06-14 |
Family
ID=38123121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002630912A Abandoned CA2630912A1 (en) | 2005-12-09 | 2006-11-24 | A method and a device in connection with handling covers in a superstructure in an electrolytic cell |
Country Status (10)
| Country | Link |
|---|---|
| CN (1) | CN101326311B (en) |
| AU (1) | AU2006323329B2 (en) |
| CA (1) | CA2630912A1 (en) |
| DK (1) | DK200800945A (en) |
| IS (1) | IS2772B (en) |
| MY (1) | MY143375A (en) |
| NO (1) | NO328467B1 (en) |
| RU (1) | RU2404293C2 (en) |
| WO (1) | WO2007067061A1 (en) |
| ZA (1) | ZA200804972B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3016890B1 (en) * | 2014-01-27 | 2016-01-15 | Rio Tinto Alcan Int Ltd | COILING SYSTEM FOR ELECTROLYSIS TANK |
| FR3018283B1 (en) * | 2014-03-05 | 2017-12-22 | Ecl | SYSTEM FOR CARRYING OUT OPERATIONS RELATING TO THE OPERATION OF CELLS OF AN ALUMINUM PRODUCTION FACILITY BY ELECTROLYSIS |
| FR3024466B1 (en) * | 2014-08-01 | 2018-05-04 | Ecl | VEHICLE FOR OPERATING CELLS OF AN ALUMINUM PRODUCTION FACILITY, INSTALLATION AND METHOD |
| GB2542360A (en) * | 2015-09-16 | 2017-03-22 | Dubai Aluminium Pjsc | Hinged grating for easy access to the outer shell of electrolytic cells suitable for the hall-héroult process |
| GB2542555A (en) * | 2015-09-16 | 2017-03-29 | Dubai Aluminium Pjsc | Removable cover and flap for easy access to the intercalary space in a series of electrolytic Hall-Héroult cells |
| RU178130U1 (en) * | 2015-11-27 | 2018-03-23 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | HIDDEN ALUMINUM ELECTROLYZER WITH BURNED ANODES |
| FR3109781A1 (en) | 2020-04-29 | 2021-11-05 | Rio Tinto Alcan International Limited | COVER WITH RESILIENT GASKET FOR ELECTROLYSIS TANK |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2263348A1 (en) * | 1972-12-23 | 1974-07-04 | Siemag Translift Gmbh | Aluminium electrolysis plant operating in fused salts - has segmented half hoods with individual drive for telescopic contraction |
| US3935090A (en) * | 1974-03-15 | 1976-01-27 | Dmitry Pavlovich Petrusenko | Covering of an aluminum-producing electrolysis cell |
| US4043892A (en) * | 1975-12-15 | 1977-08-23 | Reynolds Metals Company | Aluminum reduction cell having a lateral enclosure system |
| US4202753A (en) * | 1979-04-23 | 1980-05-13 | Swiss Aluminium Ltd. | Reduction cell hood |
| SU1786196A1 (en) * | 1991-02-11 | 1993-01-07 | Bratskij Alyuminievyj Z | Device for catching gaseous products given off aluminum electrolizer |
| NO310730B1 (en) * | 1999-11-17 | 2001-08-20 | Norsk Hydro As | Method and apparatus for operation of electrolysis cell |
| CN2479028Y (en) * | 2001-05-28 | 2002-02-27 | 郑州轻金属研究院沁阳铝电解试验厂 | Drawer-type cell cover plate |
| NO315278B1 (en) * | 2001-11-14 | 2003-08-11 | Norsk Hydro As | Method of operating a pre-baked electrolytic cell system, as well as arrangement for use in the same |
-
2005
- 2005-12-09 NO NO20055865A patent/NO328467B1/en not_active IP Right Cessation
-
2006
- 2006-11-24 RU RU2008127848/02A patent/RU2404293C2/en not_active IP Right Cessation
- 2006-11-24 WO PCT/NO2006/000431 patent/WO2007067061A1/en active Application Filing
- 2006-11-24 MY MYPI20081957 patent/MY143375A/en unknown
- 2006-11-24 CN CN200680046087XA patent/CN101326311B/en not_active Expired - Fee Related
- 2006-11-24 CA CA002630912A patent/CA2630912A1/en not_active Abandoned
- 2006-11-24 AU AU2006323329A patent/AU2006323329B2/en not_active Ceased
-
2008
- 2008-06-06 ZA ZA200804972A patent/ZA200804972B/en unknown
- 2008-06-27 IS IS8739A patent/IS2772B/en unknown
- 2008-07-04 DK DK200800945A patent/DK200800945A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200804972B (en) | 2009-04-29 |
| AU2006323329B2 (en) | 2010-12-16 |
| MY143375A (en) | 2011-05-13 |
| CN101326311A (en) | 2008-12-17 |
| WO2007067061A8 (en) | 2008-07-17 |
| DK200800945A (en) | 2008-07-04 |
| WO2007067061A1 (en) | 2007-06-14 |
| NO328467B1 (en) | 2010-02-22 |
| CN101326311B (en) | 2010-10-06 |
| RU2008127848A (en) | 2010-01-20 |
| RU2404293C2 (en) | 2010-11-20 |
| AU2006323329A1 (en) | 2007-06-14 |
| IS8739A (en) | 2008-06-27 |
| IS2772B (en) | 2011-12-15 |
| NO20055865L (en) | 2007-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20131105 |