Method and a device for the supply of electric current to transverse igneous electrolysis tanks to minimize effects of magnetic fields

A method for supplying electric current to transverse igneous electrolysis tanks which minimizes the effects of magnetic fields and applies to rectangular tanks connected in series for flow of electrical current from cathode of one tank to anode of the next tank comprising on the one hand a crucible of which the bottom constituting the cathode is formed from sealed carbon blocks on metal bars parallel to the small side of the tank, and on the other hand an anode formed from carbonaceous anodic blocks suspended from one or the other of the two metal cross pieces parallel to the large side of the tank, this method being characterized in that one anode cross piece of the downstream tank is supplied with current by conductors connected to the ends of the cathode bars on the downstream side of the downstream tank, the other anode cross piece of the downstream tank being supplied with current by one set of conductors connecting the other anode cross piece with one set of cathode bars from the upstream side and another set of conductors connecting another set of cathode bars from the upstream side of the upstream tank, one set of conductors passing about the outside of the upstream tank while the other set of conductors pass underneath the upstream tank whereby the magnetic fields created by the different supply conductors cancel one another out.