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AssigneeAluminum Pechiney
InventorsPaul Morel, Jean-Pierre Dugois
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The invention relates to a method of and an apparatus for compensating the magnetic fields in adjacent rows of transversely arranged igneous electrolysis cells. In this method, the distribution of current in the conductors feeding the anode of a downstream cell from the cathode of the adjacent upstream cell is modified in such a way as to superimpose upon the cell an electrical loop which produces an additional magnetic field substantially equal to that created by the adjacent row and opposite in direction. The invention is applicable to the compensation of the magnetic fields of adjacent rows of transversely arranged igneous electrolysis cells and, more particularly, to cells for the production of aluminium.
A method for compensating the magnetic fields of adjacent rows of transversely arranged igneous electrolysis cells wherein the anode of a downstream cell is fed with current from the cathode of the adjacent upstream cell, the current from the cathode being taken off of inner and outer cathode bars, with the inner cathode bars situated on the side of the adjacent row of cells and the outer cathode bars situated on the side opposite to the adjacent row of cells, superimposing an electrical loop which produces additional magnetic fields substantially equal to that created by the adjacent rows and in the opposite direction by increasing the intensity of the current in the conductor situated on the side of the adjacent row and connecting one of the upstream or downstream ends of the cathode bars of the upstream cell to the anode bar of the downstream cell.
An apparatus for compensating the magnetic fields of adjacent rows of transversely arranged igneous electrolysis cells comprising at least one upstream cell and one downstream cell each cell having at least two anode bars to which rods secured to the anodes are anchored, and a cathode crucible of which the base is formed by blocks of carbon secured to cathode bars, the anode bars of the downstream cell being supplied with electrical current from the cathode bars of the upstream cell by at least two steps including an inner step situated on the side of the adjacent row, and an outer step on the opposite side, each step comprising two conductors of which one is connected to the upstream ends of the cathode bars and the other or is connected to the downstream ends of the cathode bars, wherein one of the conductors of the inner step on the upstream side or downstream side is connected to more than half of the corresponding ends of the cathode bars, taken from the inner side, the conductor corresponding to the outer step being connected to the ends of the cathode bars from the outer side which are not connected to the inner step, while the other inner conductor on the downstream or upstream side is connected to less than half of the cathode bars inside of the corresponding ends and the corresponding outer conductor to less than half the cathode bars on the outer side.
An apparatus for compensating the magnetic fields of adjacent rows of transversely arranged igneous electrolysis cells without creating a parasitic horizontal field comprising at least one upstream cell and one downstream cell, in which each cell comprises at least two anode bars to which rods secured to the anodes are anchored, and a cathode crucible of which the base is formed by blocks of carbon anchored to cathode bars, the anode bars of the downstream cell being supplied with electrical current from the cathode bars of the upstream cell by at least two steps, including an inner step, situated on the side of the adjacent row, and an outer step on the opposite side, each step comprising two conductors of which one is connected to the upstream ends of the cathode bars and the other to the downstream ends of the cathode bars, wherein the upstream conductor of the inner step is connected to more than half the upstream ends of the cathode bars, taken from the inner side, the upstream conductor of the outer step being connected to the outside ends of the cathode bars which are not connected to the inner conductor, the outer downstream conductor being connected in the same greater number to half the downstream ends of the cathode bars, taken from the outer side, the inner downstream conductor being connected to the inner downstream ends of the cathode bars which are not connected to the outer downstream conductor.
Dependencies are inferred from the claim text.