Patent ID: 8500970
Filing Date: 2013-08-06
Classification: C25C

Abstract:
1. An electrolytic cell for production of aluminium, comprising: a metallic shell comprising two lateral walls that are arranged substantially symmetrically with respect to a central plane; at least one carbonaceous cathode block having side faces, end faces, and at least one groove, said block being arranged within said shell so that said groove is substantially perpendicular to said central plane; at least one collector bar made of a first metal, having at least one connection end and side faces and arranged in said groove so that said at least one connection end projects out of said block through a specified end face thereof and out of the shell through a specified lateral wall thereof; an external electrical circuit connected to the at least one connection end of said collector bar; and an electrically conducting sealing material within said groove to provide electrical contact between said collector bar and said block, wherein said cell further includes at least one complementary bar made of a second metal having an electrical conductivity greater than said first metal, wherein said at least one complementary bar has a first end and a second end, has a specified length, and is arranged adjacent to one of said side faces of said collector bar, wherein said second end is at a specified distance from said specified end face of said block, and wherein a supplementary bar made of a third metal is arranged on one of the side faces near said connection end of said collector bar so that there is a gap between said complementary bar and said supplementary bar, and wherein said third metal has an electrical conductivity greater than said first metal.