graphite, holmium, lanthanum, lithium, lutetium, manganese, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, and yttrium. (2) Secondary recovery The term secondary recovery means the recovery of minerals and metals from discarded end-use products or from waste products produced during the metal refining and manufacturing process, including from mine waste piles, acid mine drainage sludge, or byproducts produced through legacy mining and metallurgy activities.