DEVICES TO CONDUCT CURRENT TO OR FROM THE ELECTRODES IN ELECTROLYSIS CELLS, METHODS FOR PREPARATION THEREOF, AND AN ELECTROLYSIS CELL AND A METHOD FOR PRODUCTION OF ALUMINIUM BY ELECTROLYSIS OF ALUMINA SOLVED IN A MELTED ELECTROLYTE

摘要

Device (1) to conduct current to or from the electrodes of an electrolysis cell, which device in the direction towards the electrolysis cell comprises three types of segments; at least one outer segment (2) joined with at least one intermediate segment (3) which again is joined with at least one inner segment (4); where the outer segment (2) has at least one end (5) which is to/shall extend out from an electrode body (6) towards an outer current circuit, and the outer segment is coupled to at least one intermediate segment (3) which again is coupled to at least one inner segment with at least one section (4) or end (7) in the electrode body; where the inner segment (4) is manufactured from steel, the intermediate segment is manufactured with a steel lining (8) over an inner core of a material (9) with better electrical and thermal conductivity than steel, and the outer segment is manufactured from a material (9) with better electrical and thermal conductivity than steel. The devices are distinguished in that the material (9) with better electrical and thermal conductivity than steel is chosen amongst aluminium, copper, silver, alloys and intermetals thereof, preferably pure aluminium and soft copper, the intermediate segment with core of the material (9) with better electrical and thermalconductivity than steel, extends into the electrode body, and the joining between the inner segment and the intermediate segment is by means of a friction weld or induction weld via a steel insert.