An anode for use in an electrolysis process for production of aluminium in cells of hall-héroult type, and a method for making same

A method for making an anode for use in an electrolysis process for production of aluminium in cells of Hall-Héroult type, the anode comprises a body or block (20) of calcinated carbonaceous material connected with a plate-shaped electrical current lead, where said current lead being electrically connected with an anode rod (3) at one end and further being embedded in a recess (13) in top of said carbonaceous block (20) at the other end, the recess being wider than the lead and being filled with an electric conductive particulate material only, where the anode block is mechanically secured to the current lead by protruding fixation means (8″) arranged on the current lead and further corresponding with an undercut recess (10″) arranged in the anode block,

• characterised in that
• the recess (13) is made by processing an elongated slot or groove in the top of the anode block (20), then a bore (11) is made at an appropriate place of the recess (13) by applying a rotating processing tool, the bore being wider than the recess (13) and thereby defining a point of entrance of the protruding fixation means (8), followed by processing an undercut recess (10) with flanges (12, 12′) in the recess (13) by moving a processing tool along said recess (13) inside the anode block (20).