Abstract: The system comprises:—a device (9) for sorting residues transported from the outlet of a cremation furnace to an urn, capable of separating the metallic elements and the bone remains;—a device (20) for grinding the portion of the residues that contain the bone remains without metallic elements, positioned downstream of the sorting device;—a container (18) for collecting the metallic elements, and an urn (23) for collecting the ground bone remains. Metal detection means (19) control the movement of a valve (16) between a closed position of a window (15) that opens toward a container (18) for collecting metallic elements, and a position where the metallic elements may drop through this window.