Triboelectrostatic Coal Cleaning

This research has shown that both pressurized and suction configurations for utility pulverizers impart substantial and differential charge on mineral matter and combustible material in coal. The absolute value of the average charge per unit mass was the same order of magnitude for both utility systems and was in agreement with values obtained within a laboratory system. This differential charge can be utilized to beneficiate combustibles and mineral matter in-line between the pulverizers and burners under conditions typical to that of coal transport in the utility.