Yes, Dry Fog is the system of choice and is Best Demonstrated Technology for sub-bituminous western coals like PRB Coal. It used for other hydrophobic materials such as pet coke and fly ash. We make water droplets the same size as the airborne particles overcoming any surface tension issues. The Colorado School of Mines reported their research on the how droplet size effects dust suppression in a 1976 issue of Coal Age Magazine .