WO2013055228A1 - Système et procédé de contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium - Google Patents

Système et procédé de contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium Download PDF

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Publication number
WO2013055228A1
WO2013055228A1 PCT/NO2012/050195 NO2012050195W WO2013055228A1 WO 2013055228 A1 WO2013055228 A1 WO 2013055228A1 NO 2012050195 W NO2012050195 W NO 2012050195W WO 2013055228 A1 WO2013055228 A1 WO 2013055228A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
sidelining
shell
block
steel shell
Prior art date
Application number
PCT/NO2012/050195
Other languages
English (en)
Inventor
John Paul Salvador
Veroslav Sedlak
Original Assignee
Goodtech Recovery Technology As
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 Goodtech Recovery Technology As filed Critical Goodtech Recovery Technology As
Priority to AU2012321395A priority Critical patent/AU2012321395A1/en
Priority to BR112014008267A priority patent/BR112014008267A2/pt
Priority to EA201490508A priority patent/EA201490508A1/ru
Priority to EP12840196.5A priority patent/EP2766516B1/fr
Priority to US14/234,827 priority patent/US20140174943A1/en
Priority to CA2847160A priority patent/CA2847160C/fr
Publication of WO2013055228A1 publication Critical patent/WO2013055228A1/fr
Priority to ZA2014/01378A priority patent/ZA201401378B/en

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
    • C25C3/20—Automatic control or regulation of cells
    • 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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • 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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/085—Cell construction, e.g. bottoms, walls, cathodes characterised by its non electrically conducting heat insulating parts

Definitions

  • the invention relates to heat regulation in general and particularly improved method and system for cooling over a large area, suitable for use for control of layer formation over an extended area in an aluminium electrolysis cell and exploitation of heat.
  • the operations of the cells depend on the formation and maintenance of a protective layer of frozen electrolyte in the side walls of the cell.
  • This frozen bath is called side layer and protects the side lining of the cells against chemical and mechanical wear, and is an essential condition for achieving long lifetime of the cells.
  • the frozen bath operates simultaneously as a buffer for the cell with regards of changes in the heat balance.
  • the heat generation and the heat balance of the cell will vary due to unwanted disturbances of the operation (changes in bath acidity, changes in alumina concentration, changes in interpolar distances, etc.) and desired activities on the cells (metal tapping, change of anode, fire, etc.).
  • the traditional method of removing heat was to use air convection over the entire surface area of the cell, resulting in limited potential for exploitation of the removed heat.
  • a main objective of the present invention is to provide an improved method and system for use for control of layer formation in an aluminium electrolysis cell and exploitation of the heat, with a simplified and flexible structure.
  • the objective is achieved according to the invention by a system for use for control of layer formation in an aluminium electrolysis cell as defined in the preamble of claim 1 , having the features of the characterising portion of claim 1 and a method for control of layer formation in an aluminium electrolysis cell as defined in the preamble of claim 8, having the features of the characterising portion of claim 8.
  • the present invention attains the above-described objective by a reordering of the fundamental structure of a Hall-Heroult cell. Whereas the traditional ordering from the inside to the outside is:
  • the present invention provides two alternatives.
  • this embodiment is further provided with insulation outside the steel shell.
  • this embodiment is further provided with insulation outside the heat tubes.
  • a system for use for control of layer formation in an aluminium electrolysis cell and exploitation of heat comprising a sidelining block, a shell, and a heat tube is provided, wherein the sidelining block is in thermal contact with the shell, and that the heat tube is operable to remove heat from at least one of the sidelining and the shell.
  • the ordering the ordering from the inside to the outside is sidelining block - heat tube - steel shell
  • the ordering the ordering from the inside to the outside is sidelining block - steel shell - heat tube
  • the heat tube is a heat pipe.
  • the heat tube is a thermosyphon.
  • the at least one of thermal paste and thermal conductive glue is applied between sidelining block and shell.
  • a thermal insulation layer is provided as the outermost layer.
  • a method for control of layer formation in an aluminium electrolysis cell said electrolysis shell comprising a sidelining block, a shell and a heat tube, wherein the sidelining block is in thermal contact with the shell, and that the heat tube is operable to remove heat from at least one of the sidelining and the shell is provided, conducting the heat away using said surface attached heat tube.
  • the steel shell can be kept at a low temperature
  • the two embodiments that are envisaged have different advantages.
  • the thermal contact between the sidelining and the steel shell is less important since the cooling takes place in the sidelining.
  • the heat tube can be made from a material having the same thermal expansion and conduction properties as the steel shell,
  • Figure 1 shows state of the art of a Hall-Heroult cell in the form of a sidelining block, and a steel shell or casing
  • Figure 2 shows a detail section of the embodiment of figure 1 together with section as seen from the side
  • Figure 3 shows state of the art of a Hall-Heroult cell in the form of a sidelining block with hollows provided with heat tube, and a steel shell or casing,
  • Figure 4 shows a detail section of a first embodiment
  • Figure 5 shows a detail section of a second embodiment
  • a basis for the invention is the realisation that with cooling using heat tubes 12 the sidelining component ordering is more freely changed than for a traditional cell design as shown in fig. 1 with details are shown in figure 2, and even a state of the art cell using active cooling as known from previously mentioned prior art and shown in fig. 3, and that the thermal insulation also becomes an optional feature.
  • the sidelining block and the steel shell comes in close contact, wherein the steel shell is heated by radiation and by conduction. Improved thermal contact by conduction can be achieved by applying thermal paste or thermal conductive glue between sidelining block and steel shell.
  • the most preferred embodiment of the system according to the invention shown in Fig. 5 comprises an electrolyte bath enclosed by a sidelining block 1 1 of silicon carbide further enclosed by a steel shell 8.
  • the sidelining block is and the steel shell is in close thermal contact by applying a thermal paste or thermal conductive glue between sidelining block and steel shell.
  • Outside the steel shell one or more heat tubes 12 are attached.
  • Investigations show that the thermal resistance between the electrolyte and the steel shell is sufficiently low to maintain the side layer in the frozen state. Investigations also show that the heat tubes should be attached with great care so that the heat tubes remain in good contact with the steel shell 8 in order to avoid hot spots or differential thermal expansions.
  • a second preferred embodiment of the system according to the invention shown in Fig. 4 comprises an electrolyte bath enclosed by a sidelining block 1 1 of silicon carbide further enclosed by a steel shell 8.
  • the sidelining block is and the steel shell may be in close thermal contact by applying a thermal paste or thermal conductive glue between sidelining block and steel shell.
  • Inside the steel shell and at the sidelining block one or more heat tubes 12 are attached.
  • the heat tubes can be thermally attached to the sidelining blocks in several ways, a preferred method is described in the aforementioned PCT/NO201 1/000263, however not using the insulating layer as disclosed therein.
  • the steel shell 8 and the heat tubes 12 might not be as separate parts, rather the heat tubes 12 could be moulded into the steel shell during manufacture, as a monolithic unit.
  • thermal insulation can be applied outside the heat tubes. This results in lower losses of heat and thus more heat into the heat tubes and lowering the external surfaces even further. It should however be noted that this is an optional feature and that the invention will operate without this thermal insulation.
  • the temperature of the heat tubes would rise and possibly reach the same temperature as the electrolyte and the pressure inside the heat tubes would increase while the metal of the heat tube would lose its strength until resulting in failure.
  • the thermal insulation By removing the thermal insulation the heat tube temperature can be maintained at around 500°C and thus failure will be avoided. In this mode the cell would operate as a conventional cell, without heat tubes.
  • shell 8 of the cell is described as being made of steel, it should be clear that any other material will also work as long as it can conduct heat and withstand the temperatures involved.
  • the invention according to the application finds use in control of layer fornnation in an aluminium electrolysis cell and exploitation of the heat.

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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

L'invention a pour objectif de fournir un procédé et un système améliorés pour le contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium et pour l'exploitation de la chaleur. Cet objectif est atteint par l'invention au moyen d'un réagencement de la structure de base d'une cuve de Hall-Héroult, offrant deux modes de réalisation à choix, et rendant l'isolation thermique superflue. Dans un premier mode de réalisation, cet agencement se présente comme suit de l'intérieur vers l'extérieur : électrolyte - revêtement de bordure- tubes de chauffage - caisson en acier. Dans un second mode de réalisation cet agencement se présente comme suit de l'intérieur vers l'extérieur : électrolyte - revêtement de bordure- caisson en acier - tubes de chauffage.
PCT/NO2012/050195 2011-10-10 2012-10-05 Système et procédé de contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium WO2013055228A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2012321395A AU2012321395A1 (en) 2011-10-10 2012-10-05 System and method for control of layer formation in an aluminium electrolysis cell
BR112014008267A BR112014008267A2 (pt) 2011-10-10 2012-10-05 sistema e método para o controle da formação de camada em uma célula de eletrólise de alumínio
EA201490508A EA201490508A1 (ru) 2011-10-10 2012-10-05 Система и устройство для регулирования образования слоя в электролизной ванне для получения алюминия
EP12840196.5A EP2766516B1 (fr) 2011-10-10 2012-10-05 Système et procédé de contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium
US14/234,827 US20140174943A1 (en) 2011-10-10 2012-10-05 System and method for control of layer formation in an aluminum electrolysis cell
CA2847160A CA2847160C (fr) 2011-10-10 2012-10-05 Systeme et procede de controle de la formation de couches dans une cuve d'electrolyse d'aluminium
ZA2014/01378A ZA201401378B (en) 2011-10-10 2014-02-24 System and method for control of layer formation in an aluminium electrolysis cell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20111368 2011-10-10
NO20111368 2011-10-10

Publications (1)

Publication Number Publication Date
WO2013055228A1 true WO2013055228A1 (fr) 2013-04-18

Family

ID=48082138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2012/050195 WO2013055228A1 (fr) 2011-10-10 2012-10-05 Système et procédé de contrôle de la formation de couches dans une cuve d'électrolyse d'aluminium

Country Status (9)

Country Link
US (1) US20140174943A1 (fr)
EP (1) EP2766516B1 (fr)
AR (1) AR088452A1 (fr)
AU (1) AU2012321395A1 (fr)
BR (1) BR112014008267A2 (fr)
CA (1) CA2847160C (fr)
EA (1) EA201490508A1 (fr)
WO (1) WO2013055228A1 (fr)
ZA (1) ZA201401378B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014182176A1 (fr) * 2013-05-06 2014-11-13 Goodtech Recovery Technology As Cellule d'électrolyse de l'aluminium comprenant un système de régulation thermique de parois latérales

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076428A (en) * 1980-05-19 1981-12-02 Carblox Ltd Aluminium manufacture
EP0047227A2 (fr) * 1980-09-02 1982-03-10 Schweizerische Aluminium Ag Dispositif pour le réglage du flux de chaleur d'une cellule d'électrolyse à fusion de l'aluminium et procédé de fonctionnement de cette cellule
US4608134A (en) * 1985-04-22 1986-08-26 Aluminum Company Of America Hall cell with inert liner
WO2004083489A1 (fr) * 2003-03-17 2004-09-30 Norsk Hydro Asa Pile electrolytique et elements structuraux mis en application dans cette pile
WO2006053372A1 (fr) * 2004-10-21 2006-05-26 Bhp Billiton Innovation Pty Ltd Refroidissement interne d’une cellule de fusion électrolytique
US20060118410A1 (en) * 2002-07-09 2006-06-08 Laurent Fiot Method and system for cooling an electrolytic cell for aluminum production
WO2008014042A1 (fr) * 2006-07-24 2008-01-31 Alcoa Inc. Systèmes et procédés de contrôle de température de parois latérales et cellules d'électrolyse perfectionnées correspondantes
WO2012039624A1 (fr) * 2010-09-22 2012-03-29 Goodtech Recovery Technology As Système et procédé permettant de commander la formation de couche latérale d'une cellule d'électrolyse d'aluminium

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222841A (en) * 1979-04-23 1980-09-16 Alumax Inc. Hall cell
EP0095854B1 (fr) * 1982-05-28 1987-08-19 Alcan International Limited Cellules à réduction électrolytique pour la production d'aluminium
FR2694945B1 (fr) * 1992-08-20 1994-10-07 Pechiney Aluminium Superstructure de cuve d'électrolyse de très haute intensité pour la production d'aluminium.
CA2566136C (fr) * 2004-05-18 2013-11-26 Auckland Uniservices Limited Echangeur thermique
CN201952499U (zh) * 2010-12-17 2011-08-31 高德金 设置有加热装置的铝电解槽

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076428A (en) * 1980-05-19 1981-12-02 Carblox Ltd Aluminium manufacture
EP0047227A2 (fr) * 1980-09-02 1982-03-10 Schweizerische Aluminium Ag Dispositif pour le réglage du flux de chaleur d'une cellule d'électrolyse à fusion de l'aluminium et procédé de fonctionnement de cette cellule
US4608134A (en) * 1985-04-22 1986-08-26 Aluminum Company Of America Hall cell with inert liner
US20060118410A1 (en) * 2002-07-09 2006-06-08 Laurent Fiot Method and system for cooling an electrolytic cell for aluminum production
WO2004083489A1 (fr) * 2003-03-17 2004-09-30 Norsk Hydro Asa Pile electrolytique et elements structuraux mis en application dans cette pile
WO2006053372A1 (fr) * 2004-10-21 2006-05-26 Bhp Billiton Innovation Pty Ltd Refroidissement interne d’une cellule de fusion électrolytique
WO2008014042A1 (fr) * 2006-07-24 2008-01-31 Alcoa Inc. Systèmes et procédés de contrôle de température de parois latérales et cellules d'électrolyse perfectionnées correspondantes
WO2012039624A1 (fr) * 2010-09-22 2012-03-29 Goodtech Recovery Technology As Système et procédé permettant de commander la formation de couche latérale d'une cellule d'électrolyse d'aluminium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014182176A1 (fr) * 2013-05-06 2014-11-13 Goodtech Recovery Technology As Cellule d'électrolyse de l'aluminium comprenant un système de régulation thermique de parois latérales
CN105408522A (zh) * 2013-05-06 2016-03-16 古田泰克回收技术股份公司 包括侧壁温控系统的铝电解槽

Also Published As

Publication number Publication date
US20140174943A1 (en) 2014-06-26
CA2847160A1 (fr) 2013-04-18
AR088452A1 (es) 2014-06-11
EP2766516A4 (fr) 2015-07-08
EP2766516B1 (fr) 2016-11-16
EA201490508A1 (ru) 2014-09-30
BR112014008267A2 (pt) 2017-04-18
EP2766516A1 (fr) 2014-08-20
ZA201401378B (en) 2015-11-25
CA2847160C (fr) 2019-11-12
AU2012321395A1 (en) 2014-02-20

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