• High Speed Production of Large Coal to Facilitate Easier and More Effective Cleaning 

    Summers, David A.; Galecki, Greg; Gillies, A. D. S. (Argyle Douglas Stewart); Awuah-Offei, Kwame (2009-04-23)
    Most modern mining equipment extracts coal through grinding it from the solid using a set of rotating picks. This produces coal that is quite small in average size and generates a lot of dust in the process. The coal is ...