The paper discusses the chemical foaming process of porous structures based on recycled Low-Density Polyethylene (LDPE) and metal powders for electromagnetic interference (EMI) shielding applications. The current literature shows that carbon-based fillers are preferred for fabricating random porous structures based on conductive polymer composite (CPC) thanks to their higher electrical conductivity, lower density, and good processability [1-2]; in contrast, virgin metallic particles are mainly limited due to their high prices and availability. A solution to mitigate such materials' cost and environmental impact can be identified by reusing metal particles or powders retrieved by electronic waste or industrial and manufacturing process discards [3]. Nonetheless, it is worth underlining that the foaming and characterization of porous structures for EMI shielding purposes and involving CPC made of recycled polymers and reused metals simultaneously still need to be addressed by current literature. For these reasons, in this paper, we propose the fabrication of foams based on recycled LDPE and reused metal particles (AISI 316L, WC/Co/Cr, Ni superalloy) retrieved by the Powder Bed Fusion-Laser Beam (PBF-LB) process [4].