FS 2019-3048: Rare Earth Elements in Coal and Coal Fly
2019-9-12 · ties of fly ash, about half of which is beneficially reused, primarily in con struction materials (American Coal Ash Association, 2017). The remainder is stored, mostly in landfills and impound ments. Thus, annual fly ash production, combined with fly ash already in stor age, constitutes a large potential resource (Hower and others, 2017).
