Patents by Inventor Christian Duval

Christian Duval has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10513788
    Abstract: A cell includes a pot shell defining an opening through which an anode block is designed to be moved, said anode block being suspended from an anode support forming with said anode block an anode assembly mobile in relation to the pot shell, and a confinement chamber defining a closed volume above said opening for the containment of the gases generated during the production of aluminum, the anode support being connected to an electrical conductor to supply an electrolysis current to the anode block, the anode assembly is fully contained in the confinement chamber, and in that the electrical connection between the mobile electrical conductor and the anode support is made within the confinement chamber.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: December 24, 2019
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Olivier Martin, Christian Duval, Steeve Renaudier, Benoit Bardet
  • Patent number: 10344390
    Abstract: This aluminum smelter comprises a row of cells (50) arranged transversely in relation to the length of the row, the cells (50) individually comprising an anode (52), rising and connecting electrical conductors (54) running upwards along the two opposite longitudinal edges of the cell (50) to route the electrolysis current towards the anode (52), and a cathode (56) through which pass cathode conductors (55) connected to cathode outputs connected to linking conductors to route the electrolysis current to the rising and connecting electrical conductors of the next cell (50). Furthermore the aluminum smelter comprises a compensating electrical circuit separate from the electrical circuit through which the electrolysis current flows, running beneath the cells (50), through which a compensating current may flow beneath the cells (50) in a direction opposite to the overall direction of flow of the electrolysis current.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: July 9, 2019
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Steeve Renaudier, Benoit Bardet, Olivier Martin, Christian Duval
  • Patent number: 9598783
    Abstract: An aluminum smelter comprising: (i) a series of electrolytic cells, designed for the production of aluminum, forming one or more rows, (ii) a supply station designed to supply the series of electrolytic cells with an electrolysis current, the said electricity supply station comprising two poles, (iii) a main electrical circuit through which the electrolysis current flows, having two extremities each connected to one of the poles of the supply station, (iv) at least one secondary electrical circuit comprising an electrical conductor made of superconducting material through which a current flows, running along the row or rows of electrolytic cells, characterized in that the electrical conductor made of superconducting material in the secondary electrical circuit runs along the row or rows of electrolytic cells at least twice in such a way as to make several turns in series.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: March 21, 2017
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Christian Duval, Steeve Renaudier, Benoit Bardet, Olivier Martin, Stéphane Wan Tang Kuan
  • Publication number: 20160326661
    Abstract: This cell (1) comprises a pot shell (2) defining an opening through which an anode block (10) is designed to be moved, said anode block (10) being suspended from an anode support (8) forming with said anode block an anode assembly mobile in relation to the pot shell (2), and a confinement chamber (22) defining a closed volume above said opening for the containment of the gases generated during the production of aluminum, the anode support (8) being connected to an electrical conductor (26) to supply an electrolysis current to the anode block (10), the anode assembly is fully contained in the confinement chamber (22), and in that the electrical connection between the mobile electrical conductor (26) and the anode support (8) is made within the confinement chamber (22).
    Type: Application
    Filed: January 23, 2015
    Publication date: November 10, 2016
    Inventors: Olivier MARTIN, Christian DUVAL, Steeve RENAUDIER, Benoit BARDET
  • Publication number: 20160201208
    Abstract: This aluminum smelter comprises a row of cells (50) arranged transversely in relation to the length of the row, the cells (50) individually comprising an anode (52), rising and connecting electrical conductors (54) running upwards along the two opposite longitudinal edges of the cell (50) to route the electrolysis current towards the anode (52), and a cathode (56) through which pass cathode conductors (55) connected to cathode outputs connected to linking conductors to route the electrolysis current to the rising and connecting electrical conductors of the next cell (50). Furthermore the aluminum smelter comprises a compensating electrical circuit separate from the electrical circuit through which the electrolysis current flows, running beneath the cells (50), through which a compensating current may flow beneath the cells (50) in a direction opposite to the overall direction of flow of the electrolysis current.
    Type: Application
    Filed: July 30, 2014
    Publication date: July 14, 2016
    Inventors: Steeve Renaudier, Benoit Bardet, Olivier Martin, Christian Duval
  • Publication number: 20140209457
    Abstract: An aluminum smelter comprising: (i) a series of electrolytic cells, designed for the production of aluminum, forming one or more rows, (ii) a supply station designed to supply the series of electrolytic cells with an electrolysis current, the said electricity supply station comprising two poles, (iii) a main electrical circuit through which the electrolysis current flows, having two extremities each connected to one of the poles of the supply station, (iv) at least one electrical conductor made of superconducting material, characterized in that the electrical conductor made of superconducting material is placed wholly or partly within an enclosure forming a magnetic shield.
    Type: Application
    Filed: July 10, 2012
    Publication date: July 31, 2014
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Christian Duval, Steeve Renaudier, Benoit Bardet, Olivier Martin, Stéphane Wan Tang Kuan
  • Publication number: 20140138240
    Abstract: Aluminum smelter comprising: (i) a series of electrolytic cells, comprising an anode, a cathode and a pot shell equipped with a side wall and a bottom, each cathode including at least one cathode output, (ii) a main electric circuit through which an electrolysis current passes, including an electrical conductor connected to each cathode output of a cell N, and to the anode of a cell N+1, and (iii) a means to stabilize the electrolytic cells. At least one of the cathode outputs of the cathode of N passes through the bottom of the pot shell, and during the operation of N and N+1, the electrolysis current passes, in an upstream-downstream direction only, through each electrical conductor extending from each cathode output of N in the direction of N+1.
    Type: Application
    Filed: July 10, 2012
    Publication date: May 22, 2014
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Olivier Martin, Steeve Renaudier, Benoit Bardet, Christian Duval
  • Publication number: 20140138241
    Abstract: An aluminum smelter comprising: (i) a series of electrolytic cells, designed for the production of aluminum, forming one or more rows, (ii) a supply station designed to supply the series of electrolytic cells with an electrolysis current, the said electricity supply station comprising two poles, (iii) a main electrical circuit through which the electrolysis current flows, having two extremities each connected to one of the poles of the supply station, (iv) at least one secondary electrical circuit comprising an electrical conductor made of superconducting material through which a current flows, running along the row or rows of electrolytic cells, characterized in that the electrical conductor made of superconducting material in the secondary electrical circuit runs along the row or rows of electrolytic cells at least twice in such a way as to make several turns in series.
    Type: Application
    Filed: July 10, 2012
    Publication date: May 22, 2014
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Christian Duval, Steeve Renaudier, Benoit Bardet, Olivier Martin, Stéphane Wan Tang Kuan
  • Publication number: 20060086607
    Abstract: The invention relates to an electrolysis installation, intended for the production of aluminium based on igneous electrolysis, comprising a potroom, a plurality of electrolytic cells arranged inside the potroom, a service aisle parallel to the line of cells and located inside the potroom, and at least one first mobile lifting and handling unit, supported on a first runway parallel to the main axis A of the line, and that can be moved above the line of cells on the first runway, and wherein the installation also comprises at least one second mobile lifting and handling unit, and a second runway parallel to the main axis A of the line and independent of the first runway, and in that the second unit is supported on the second runway and can be moved along the second runway and can be moved underneath the first unit and along the line of electrolytic cells, on the second runway, such that the two lifting and handling units can be moved independently, and in that the said second unit is capable of lifting and hand
    Type: Application
    Filed: July 9, 2003
    Publication date: April 27, 2006
    Applicant: Aluminum Pechiney
    Inventor: Christian Duval
  • Patent number: 5378338
    Abstract: Superstructure for a very high power electrolysis cell for the production of aluminum using the Hall-Heroult process. The cell being formed of a heat-insulated metal casing of elongated parallelepipedic shape. The said superstructure comprising at least one rigid beam disposed along the long length of the casing, resting on supports, and supporting in particular the anodic frame structure to which are connected on the one hand the current risers coming from the preceding cell in the series and on the other hand the anode rods, characterized in that each rigid beam rests only upon supports placed between its ends, termed intermediate gantries. In that each anodic frame structure associated with each rigid beam includes electrical and mechanical connection or connectors to the anode completely fixed to the anodic frame structure and ensuring the contact and the clamping of each anode rod against it following lateral engagement and positioning of each rod in the corresponding connector.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: January 3, 1995
    Assignee: Aluminium Pechiney
    Inventors: Bernard Langon, Christian Duval, Alain Vanacker
  • Patent number: 4720333
    Abstract: The invention concerns a superstructure for a tank for the production of aluminum using the Hall-Heroult process by the electrolysis of alumina in molten cryolite, the tank being formed by a rigid metal heat-insulated casing of elongate parallelepipedic shape, the two ends of which are referred to as heads, and a superstructure formed by at least one rigid beam disposed along the long length of the casing, supporting in particular the anodic bus and the anodes and resting at its two ends on supports disposed at the two head ends of the tank, said superstructure being characterized in that each rigid beam is supported on at least one intermediate gantry in the central part thereof. The gantry may comprise four legs so as to constitute an inherently stable structure or it may be formed by two half-elements each provided with two legs. Preferably, each rigid beam is divided into two equal portions, the central ends of which are supported on the gantry.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: January 19, 1988
    Assignee: Aluminium Pechiney
    Inventors: Christian Duval, Bernard Langon, Michel Leroy, Alain Noizet