11 10 Coal Cleaning United States Environmental 11 10 Coal Cleaning 11 10 1 Process Description1-2 9 Coal cleaning is a process by which impurities such as sulfur ash and rock are removed from coal to upgrade its value Coal cleaning processes are categorized as either physical cleaning or chemical cleaning Physical coal cleaning processes the mechanical separation of coal from its-cost of coal cleaning equipment-,Mapping the Economics of U S Coal Power and the Rise of coal accounted for roughly 50% of U S electricity generation Figure 2 By 2015 coal's contribution had dropped to 34% of total generation and it is predicted to decline further 10 11 The rapid recent decline in coal use in the U S can be attributed to the increased real and relative costs of burning coal due to stricter environmental…… Get More