Abstract: The invention relates to a multi-layer lifter for semi-autogenous mills or SAG mills with improved durability, made up of: a base formed by a body having a rectangular cross-section, which has a first straight side wall and a second angled side wall; where an angled rectangular portion emerges from the upper half of said angled wall, in which a trapezoidal projection emerges from the lower portion of said base, to fit with the coatings or liners of the inside of the mill; a multi-laminated spring portion which is made up of a plurality of convex curved sheets and a bent straight portion that is located under the angled rectangular portion of said base; and a hollowed-out rubber body, located in the cavity formed by the base and the convex curved sheets.

Abstract: A reusable anode system for electrorefining processes allows eliminating the excess or scrap and generating a continuous electrorefining process having an increased contact surface between the anode and the electrolyte which comprises: a container (10) which is made of stainless steel and having the shape of a straight thin rectangular parallelepiped which on its front and rear faces has a plurality of holes (11) allowing the communication between the outside and inside in such a way the electrolyte is able to enter the container (10) wherein the upper portion of the container (10) is projecting higher than the position of the electrical contact bars (12, 13) by means of projections (16) extending the inside (15) of the container (10) to form an unloading and loading zone and (b) a plurality of copper bars (14) coming from an extrusion and wire drawing process is grouped inside (15) of the container.