Patent ID: 8500827

Claim:
A method for preparing a continuous nano-dispersion slurry of coal-in-water suitable for use as an efficient-burning liquid fuel, coal particles in the nano-dispersion slurry of coal-in-water comprising about 50 weight percent to about 80 weight percent of the slurry, water comprising about 20 weight percent to about 50 weight percent of the slurry, between about 30% to about 50% of the coal particles having a size of about 10 microns or less, and at least 20% of the coal particles having a size of less than 1 micron with a size mode of about 200 nm to about 300 nm, the method comprising: providing a source of water to a chamber with a slit channel; providing a source of coal to the chamber to create an initial slurry of coal-in-water; spinning the initial slurry of coal-in-water in a centrifugal field in excess of 13,000 gs to create a film of the initial slurry of coal-in-water; and milling the coal that has been concentrated in stagnation regions in a wet-comminution process for about 3 seconds to about 20 seconds to form the nano-dispersion of coal in water slurry.