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WO2007067061A1 - 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 PDF

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Publication number
WO2007067061A1
WO2007067061A1 PCT/NO2006/000431 NO2006000431W WO2007067061A1 WO 2007067061 A1 WO2007067061 A1 WO 2007067061A1 NO 2006000431 W NO2006000431 W NO 2006000431W WO 2007067061 A1 WO2007067061 A1 WO 2007067061A1
Authority
WO
WIPO (PCT)
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.)
Ceased
Application number
PCT/NO2006/000431
Other languages
French (fr)
Other versions
WO2007067061A8 (en
Inventor
Helge Kleiva
Frank Ovstetun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Norsk Hydro ASA filed Critical Norsk Hydro ASA
Priority to CN200680046087XA priority Critical patent/CN101326311B/en
Priority to AU2006323329A priority patent/AU2006323329B2/en
Priority to CA002630912A priority patent/CA2630912A1/en
Publication of WO2007067061A1 publication Critical patent/WO2007067061A1/en
Anticipated expiration legal-status Critical
Priority to IS8739A priority patent/IS2772B/en
Publication of WO2007067061A8 publication Critical patent/WO2007067061A8/en
Ceased legal-status Critical Current

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
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/22—Collecting emitted gases

Definitions

  • 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.
  • 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).
  • Rg. 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.
  • 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.
  • 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.
  • the handling of the cover(s) stated may be performed with the assistance of a positioning system.
  • 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:

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)
  • Load-Engaging Elements For Cranes (AREA)
  • Arc Welding In General (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.

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 better 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). Rg. 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.

Claims

Claims
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-Heroult 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.
PCT/NO2006/000431 2005-12-09 2006-11-24 A method and a device in connection with handling covers in a superstructure in an electrolytic cell Ceased WO2007067061A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN200680046087XA CN101326311B (en) 2005-12-09 2006-11-24 A method and a device in connection with handling covers in a superstructure in an electrolytic cell
AU2006323329A AU2006323329B2 (en) 2005-12-09 2006-11-24 A method and a device in connection with handling covers in a superstructure in an electrolytic cell
CA002630912A 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
IS8739A IS2772B (en) 2005-12-09 2008-06-27 Method and apparatus for handling casings for superstructure in electrolytic tanks

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
WO2007067061A1 true WO2007067061A1 (en) 2007-06-14
WO2007067061A8 WO2007067061A8 (en) 2008-07-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000431 Ceased 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

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)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2375504C2 (en) * 2007-12-11 2009-12-10 Общество с ограниченной ответственностью "Русская инжиниринговая компания" Covering of aluminium electrolytic cell with self-burnt anode and top current contact jaw
WO2015110903A1 (en) * 2014-01-27 2015-07-30 Rio Tinto Alcan International Limited Hooding system for an electrolytic cell
WO2016016516A1 (en) * 2014-08-01 2016-02-04 Fives Ecl. Vehicle for operating cells of an aluminium production facility, and corresponding facility and method
WO2015132479A3 (en) * 2014-03-05 2016-03-24 Fives Ecl. System for carrying out operations linked to the use of cells of a facility for producing aluminium by means of electrolysis
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
WO2017046677A1 (en) * 2015-09-16 2017-03-23 Dubai Aluminium Pjsc Removable cover and flap for easy access to the intercalary space in a series of electrolytic hall-héroult cells
FR3109781A1 (en) 2020-04-29 2021-11-05 Rio Tinto Alcan International Limited COVER WITH RESILIENT GASKET FOR ELECTROLYSIS TANK

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU178130U1 (en) * 2015-11-27 2018-03-23 Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" HIDDEN ALUMINUM ELECTROLYZER WITH BURNED ANODES

Citations (5)

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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
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
WO2003042618A1 (en) * 2001-11-14 2003-05-22 Norsk Hydro Asa A method for operating a pre-bake electrolysis cell system and an arrangement for use in this system

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US3935090A (en) * 1974-03-15 1976-01-27 Dmitry Pavlovich Petrusenko Covering of an aluminum-producing electrolysis cell
NO172250C (en) * 1990-05-07 1993-06-23 Elkem Aluminium DEVICE FOR CLOSING THE ANODETOPE ON A SODER BERGANODEI AN ELECTROLYCLE CELL FOR ALUMINUM PRODUCTION
NO179415C (en) * 1994-02-21 1996-10-02 Elkem Aluminium Method and apparatus for closing and cooling the top of the anode sheath on a Söderberganode in an electrolytic cell for the production of aluminum
AU8031298A (en) * 1997-07-08 1999-02-08 Moltech Invent S.A. Aluminium production cell design
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
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
WO2003042618A1 (en) * 2001-11-14 2003-05-22 Norsk Hydro Asa A method for operating a pre-bake electrolysis cell system and an arrangement for use in this system

Non-Patent Citations (1)

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DATABASE WPI Week 199404, Derwent World Patents Index; Class M28, AN 1994-033235, XP003014353 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2375504C2 (en) * 2007-12-11 2009-12-10 Общество с ограниченной ответственностью "Русская инжиниринговая компания" Covering of aluminium electrolytic cell with self-burnt anode and top current contact jaw
EP3099841A4 (en) * 2014-01-27 2017-11-08 Rio Tinto Alcan International Limited Hooding system for an electrolytic cell
WO2015110903A1 (en) * 2014-01-27 2015-07-30 Rio Tinto Alcan International Limited Hooding system for an electrolytic cell
FR3016890A1 (en) * 2014-01-27 2015-07-31 Rio Tinto Alcan Int Ltd COILING SYSTEM FOR ELECTROLYSIS TANK
AU2015208857B2 (en) * 2014-01-27 2018-08-16 Rio Tinto Alcan International Limited Hooding system for an electrolytic cell
DK179126B1 (en) * 2014-01-27 2017-11-20 Rio Tinto Alcan Int Ltd COVERING SYSTEM FOR AN ELECTROLYTIC CELL
WO2015132479A3 (en) * 2014-03-05 2016-03-24 Fives Ecl. System for carrying out operations linked to the use of cells of a facility for producing aluminium by means of electrolysis
WO2016016516A1 (en) * 2014-08-01 2016-02-04 Fives Ecl. Vehicle for operating cells of an aluminium production facility, and corresponding facility and method
FR3024466A1 (en) * 2014-08-01 2016-02-05 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
WO2017046677A1 (en) * 2015-09-16 2017-03-23 Dubai Aluminium Pjsc Removable cover and flap for easy access to the intercalary space in a series of electrolytic hall-héroult cells
WO2017046678A1 (en) * 2015-09-16 2017-03-23 Dubai Aluminium Pjsc Hinged grating for easy access to the outer shell of electrolytic cells suitable for the hall-héroult process
FR3109781A1 (en) 2020-04-29 2021-11-05 Rio Tinto Alcan International Limited COVER WITH RESILIENT GASKET FOR ELECTROLYSIS TANK

Also Published As

Publication number Publication date
NO328467B1 (en) 2010-02-22
NO20055865L (en) 2007-06-11
WO2007067061A8 (en) 2008-07-17
ZA200804972B (en) 2009-04-29
RU2008127848A (en) 2010-01-20
IS2772B (en) 2011-12-15
CN101326311A (en) 2008-12-17
AU2006323329A1 (en) 2007-06-14
CA2630912A1 (en) 2007-06-14
MY143375A (en) 2011-05-13
AU2006323329B2 (en) 2010-12-16
DK200800945A (en) 2008-07-04
IS8739A (en) 2008-06-27
RU2404293C2 (en) 2010-11-20
CN101326311B (en) 2010-10-06

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