Deurbrouck, A. W. Washing fine-size coal in a dense-medium cyclone Deurbrouck, A. W. - Washington Bureau of mines 1974 - 6 p. - RI 7982 . Subjects--Topical Terms: MINERIAMINING Subjects--Index Terms: SEPARADORES (MAQUINAS) LAVADO DE CARBON SEPARATORS (MACHINES) COAL WASHING Universal Decimal Class. No.: 622