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WO1999039027A1 - Procedure et equipement pour la manipulation de corps carbones et d'autres materiaux - Google Patents

Procedure et equipement pour la manipulation de corps carbones et d'autres materiaux Download PDF

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Publication number
WO1999039027A1
WO1999039027A1 PCT/NO1999/000021 NO9900021W WO9939027A1 WO 1999039027 A1 WO1999039027 A1 WO 1999039027A1 NO 9900021 W NO9900021 W NO 9900021W WO 9939027 A1 WO9939027 A1 WO 9939027A1
Authority
WO
WIPO (PCT)
Prior art keywords
equipment
tunnel
electrolysis
plant
accordance
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/NO1999/000021
Other languages
English (en)
Inventor
Leif Meisingseth
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 AU21911/99A priority Critical patent/AU2191199A/en
Publication of WO1999039027A1 publication Critical patent/WO1999039027A1/fr
Anticipated expiration legal-status Critical
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
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/06—Operating or servicing
    • 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

Definitions

  • the present invention concerns a procedure and equipment for handling carbon bodies and other materials in an electrolysis plant, preferably for the production of aluminium.
  • anodes are removed with mechanical lifting equipment such as a traversing crane or a wheeled vehicle.
  • An electrolysis cell may often have 20-30 anodes which are replaced in turn while the furnace is in operation in some plants.
  • An anode is replaced after a period of approximately 20-30 days.
  • a modern aluminium production plant may often comprise an electrolysis hall with several hundred electrolysis cells. Therefore, replacement work of anodes constitutes a major part of the activities in such a plant. It is, therefore, important that the logistics and transport systems in connection with such a plant are designed optimally.
  • an anode When an anode is removed from the cell, it may typically have a temperature of 900-1000°C. Moreover, it may be accompanied by some melt and bath crust which has become attached to the anode or its suspension (yoke) and by material grabbed out of the bath melt. At such temperatures, the anodes and material grabbed out will give off fluorine gases and other pollutant, health-hazardous gases as well as dust into the atmosphere in the electrolysis hall while being transported away from the cell. Moreover, manual or semi-automatic handling of the anodes requires extensive use of well-qualified personnel to achieve rational operation. Such handling of the anodes may also involve a certain risk of injury to personnel and equipment in the plant.
  • US 5,182,869 concerns equipment for cooling anodes which are removed from electrolysis cells. The purpose is to be able to more rapidly begin the work on cleaning the anode hangers for reuse in the suspension of new anodes.
  • the equipment comprises a cooling chamber through which a belt conveyor passes, which transports the anodes through the chamber.
  • the cooling chamber may be closed at both ends using doors and in the lower part of the chamber it is possible to add cooling air while an exhaust is arranged in the upper part of the chamber.
  • the anodes may be placed on a pallet in the cooling chamber and inserted into and removed from the chamber using a fork-lift truck.
  • the cooling chamber may have an inlet which is located inside the electrolysis hall.
  • the equipment will not solve in the transport-related problems inside the hall. Nor can it be seen that the equipment involves particular advantages with regard to the logistics inside the electrolysis plant. Further, the above solution will not solve the problems related to the emission of gases and dust into the hall atmosphere. This is because some used anodes must still be transported over long distances inside the plant, in particular anodes used in cells furthest away from the inlet of the cooling chamber.
  • Fig. 1 shows a cross-section of an electrolysis hall designed in accordance with the present invention
  • Fig. 2 shows a side view of details of a lift device for use in connection with the present invention
  • Fig. 3 shows a longitudinal section of a transport track with wagons
  • Fig. 4a shows a top view of a traversing arrangement for the wagons of the transport track
  • Fig. 4b shows a section through B-B in fig. 4a
  • Fig. 4c shows a section through A-A in fig. 4a.
  • Figure 1 shows an electrolysis hall 1 comprising two parallel rows of electrolysis cells 2, 3.
  • the rows each have a traversing crane 4, 5 to perform lifting operations in connection with work/maintenance on the cells.
  • the cranes may be radio-controlled and are used in particular in connection with anode changes.
  • two parallel cooling transport tunnels 6, 7 are arranged for the transport of anodes to/from the cells and material grabbed out of the cells.
  • the tunnels each have a transport track 17, 18 which may comprise rails.
  • the tunnels are closed using a base 8, walls 9, 10 and a roof 11 , and further communicate with the space 12 of the electrolysis hall using trapdoor devices arranged in the roof 11 of the tunnels, which here corresponds to the floor of the electrolysis hall.
  • the walls of the tunnel may have a system 13, 14 for supplying fresh air to its lower parts while an exhaust 15, 16 may be arranged in the upper parts for the removal of gases from the tunnels.
  • the gas may expediently be conducted to a gas purification plant with heat recovery (not shown) before being released into the open air.
  • the tunnels may also be linked to each other by means of openings defined between the support columns 40 of the hall, see figure 2.
  • Trains comprising several wagons 41 may be arranged in the tunnels and run to predetermined locations in the part of the electrolysis hall in which the carbon body replacement is to take place.
  • the trains are preferably computer-controlled and controlled in accordance with a predefined computer program. The creation of such programs and the provision of the necessary equipment is something that the man skilled in the art will be familiar with and will consequently not be described further here.
  • a trapdoor arrangement 42 is arranged in the floor beside each of the transverse cells where new anode carbon and butts with accompanying grabbed-out material can be raised/lowered from/to the transport tunnel.
  • the trapdoor device may comprise two trapdoor halves 43, 44 which act in unison. Under each trapdoor there is a lift 45 which lifts transport cassettes 46 up through the trapdoor so that the lifting distance for the radio-controlled crane is minimised. Both the number and location of the trapdoors are arranged expediently so that the transport time for the used anodes and the crust material in the free spaces of the hall is reduced to a minimum to restrict the emission of gases into the hall atmosphere.
  • Grabbed-out material 80 from the cells may also be placed in separate transport containers 81 on the train, see figure 3. Moreover, the transport of anode carbon 82 consisting of a carbon body 84 and an anode hanger 83 is also shown. The transport containers may, in the same way as the anode carbon, be lifted up to the floor level of the electrolysis hall for loading of the material which is grabbed out of the cells.
  • Figure 4a shows a top view of a traversing arrangement for wagons which run through the tunnels.
  • the traversing arrangement is expediently mounted at one end of the tunnels 6, 7 and comprises means which allow rational loading/unloading of the wagons of the trains.
  • the tunnels may preferably be longer than the electrolysis hall.
  • the traversing arrangement at one end of the tunnels and possibly an equivalent system at the other ends of the tunnels (not shown) may be on the same level as the base 8 of the tunnels.
  • the tunnels may be given a gentle incline so that the stated arrangement can be on a level with the floor 11 of the electrolysis hall 1.
  • the transport tracks 17, 18 are shown rather schematic and the wagons are served by a traversing wagon 100 which can be used to handle anode carbon 82 or transport containers 81.
  • the equipment may comprise a traversing crane 101 or a traversing wagon which can be used for loading/unloading carbon bodies.
  • the crane or traversing wagon can also be used for handling transport containers.
  • Figure 4b shows a section through B-B in figure 4a and shows the traversing wagon 100 and the traversing crane 101.
  • Figure 4c shows a section through A-A in figure 4a and thus shows the traversing wagons 100 in a side view.
  • the present invention is not restricted by the above description of examples and figures.
  • the described rails and trains may be replaced by, for example, endless conveyors such as belt conveyors or hanging conveyors.
  • the described traversing arrangement may also be constructed in other ways, depending on the rest of the infrastructure in the plant.

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)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne une procédure et un équipement pour la manipulation et le transport d'objets, tels que des corps en carton et du matériau en croûte, associés à des cuves d'électrolyse (2, 3) d'une usine d'électrolyse (1), de préférence pour la production d'aluminium. L'usine peut comprendre plusieurs cuves d'électrolyse disposées en une ou plusieurs rangées et l'équipement peut comporter au moins un tunnel (6, 7) ou un long espace fermé pour le transport des objets vers les cuves ou au départ de celles-ci. Le tunnel est disposé parallèlement à la rangée de cuves d'électrolyse et de préférence à un niveau inférieur au niveau du sol (11) de l'usine.
PCT/NO1999/000021 1998-01-30 1999-01-27 Procedure et equipement pour la manipulation de corps carbones et d'autres materiaux Ceased WO1999039027A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU21911/99A AU2191199A (en) 1998-01-30 1999-01-27 A procedure and equipment for handling carbon bodies and other materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19980430 1998-01-30
NO980430A NO980430L (no) 1998-01-30 1998-01-30 Fremgangsmåte og utstyr for håndtering av kullegemer og annet materiale

Publications (1)

Publication Number Publication Date
WO1999039027A1 true WO1999039027A1 (fr) 1999-08-05

Family

ID=19901607

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1999/000021 Ceased WO1999039027A1 (fr) 1998-01-30 1999-01-27 Procedure et equipement pour la manipulation de corps carbones et d'autres materiaux

Country Status (3)

Country Link
AU (1) AU2191199A (fr)
NO (1) NO980430L (fr)
WO (1) WO1999039027A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003042618A1 (fr) * 2001-11-14 2003-05-22 Norsk Hydro Asa Procede permettant de faire fonctionner un systeme de cellules a l'electrolyse pre-cuites et dispositif destine a etre utilise dan ce systeme
FR2842216A1 (fr) * 2002-07-11 2004-01-16 Pechiney Aluminium Installation de production d'aluminium par electrolyse ignee
EP3061048B1 (fr) 2013-10-25 2018-10-10 Rio Tinto Alcan International Limited Système de gestion de flux logistiques d'une usine d'électrolyse, aluminerie comprenant ce système, véhicule pour la mise en oeuvre de ce système et procédé d'implantation de ce système dans une usine d'électrolyse préexistante

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414825A (en) * 1981-07-15 1983-11-15 Klockner-Humboldt-Deutz Ag Cooling device for carbon anodes
EP0324631A1 (fr) * 1988-01-12 1989-07-19 Norsk Hydro A/S Procédé pour enlever des anodes de cuves d'électrolyse servant à la préparation de l'aluminium
US5182869A (en) * 1990-10-24 1993-02-02 Westfalia Becorit Industrietechnik Gmbh Apparatus for cooling spent anodes of electrolytic melting baths
EP0618313A2 (fr) * 1993-02-25 1994-10-05 TECHMO Car S.p.A. Equipement automatisé pour le remplaçement des anodes dans les cuves d'électrolyse pour la production d'aluminium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414825A (en) * 1981-07-15 1983-11-15 Klockner-Humboldt-Deutz Ag Cooling device for carbon anodes
EP0324631A1 (fr) * 1988-01-12 1989-07-19 Norsk Hydro A/S Procédé pour enlever des anodes de cuves d'électrolyse servant à la préparation de l'aluminium
US5182869A (en) * 1990-10-24 1993-02-02 Westfalia Becorit Industrietechnik Gmbh Apparatus for cooling spent anodes of electrolytic melting baths
EP0618313A2 (fr) * 1993-02-25 1994-10-05 TECHMO Car S.p.A. Equipement automatisé pour le remplaçement des anodes dans les cuves d'électrolyse pour la production d'aluminium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003042618A1 (fr) * 2001-11-14 2003-05-22 Norsk Hydro Asa Procede permettant de faire fonctionner un systeme de cellules a l'electrolyse pre-cuites et dispositif destine a etre utilise dan ce systeme
FR2842216A1 (fr) * 2002-07-11 2004-01-16 Pechiney Aluminium Installation de production d'aluminium par electrolyse ignee
WO2004007807A3 (fr) * 2002-07-11 2004-04-08 Pechiney Aluminium Installation de production d'aluminium par electrolyse ignee
EP3061048B1 (fr) 2013-10-25 2018-10-10 Rio Tinto Alcan International Limited Système de gestion de flux logistiques d'une usine d'électrolyse, aluminerie comprenant ce système, véhicule pour la mise en oeuvre de ce système et procédé d'implantation de ce système dans une usine d'électrolyse préexistante

Also Published As

Publication number Publication date
NO980430L (no) 1999-08-02
AU2191199A (en) 1999-08-16
NO980430D0 (no) 1998-01-30

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