Abstract: A unit for the collection, cleaning and calibration of electrolysis pots and, in particular, of anodic orifices thereof, as the anodes of an installation for the production of aluminum by igneous electrolysis are replaced, includes two buckets hinge-mounted at the level of a lower end of a shovel-bearing chassis which is vertically movable. The lower edge of each of the buckets is movable in a circular direction by a connecting rod assembly. Also the shovel-bearing chassis is joined to a vertical guide mast and is mechanically linked to the buckets-supporting chassis. The buckets-supporting chassis is moveable relative to the shovel-bearing chassis and integrates the connecting rod assembly for closing and opening the buckets with the buckets being hinge-mounted at the lower end of the buckets-supporting chassis.