Patent ID: 6551473
Filing Date: 2003-04-22
Classification: C25C

Abstract:
An arrangement of electrolysis pots suitable for use for the production of aluminum by igneous electrolysis according to the Hall-HÃ©roult process with an electrolysis current with intensity Io comprising:juxtaposed zones including an inner lateral zone, a central zone, and an outer lateral zone, at least one first line of electrolysis pots forming a first electrical circuit, at least one second electrical circuit located at a determined average distance from said first line, wherein said first line includes N pots arranged crosswise and connecting conductors to transmit said electrolysis current Io from an upstream pot in the first line, to a downstream pot in said first line, each pot in said first line comprising a metal shell, at least one internal lining element, at least one anode and at least one cathodic element, each of said cathodic elements being provided with cathodic connection ends, wherein a first part Im of the current Io being output through the cathodic ends exits from the upstream side of each pot, and a second part Iv of the current Io being output through the cathodic ends exits from the downstream side of each pot, said connecting conductors further including risers, the current Io being output from all cathodic elements in an upstream pot being transmitted to the anodes of a downstream pot through said risers, at least one axial conductor that passes under each upstream pot in the central zone, at least one lateral conductor that passes under each upstream pot in the inner lateral zone, at least one bypass conductor that goes around each upstream pot, and wherein each lateral conductor is connected to a first set of said cathodic ends located on an upstream side in order to transmit a first part I1 of the current Im comprising between 10 and 20% of the said current Im, to said risers, each axial conductor is connected to a second set of the said cathodic ends located on an upstream side in order to transmit a second part I2 of the said current Im comprising between 10 and 20% of the said current Im, to said risers, and each bypass conductor is connected to a third set of the said cathodic ends located on an upstream side in order to transmit a third part I3 of the current I comprising a remaining portion of the current Im, and further wherein said risers connect the cathodic ends located on the downstream side of the corresponding upstream pot to the conducters passing under said pot and to each bypass conductor of the said pot, such that a fraction Mc of the current Io less than 15% is transmitted through the risers located in the central zone of the first line.