METHOD FOR COAL-WATER FUEL PRODUCTION Russian patent published in 2012 - IPC C10L1/32 B02C19/00 B02C19/18 

FIELD: power engineering.

SUBSTANCE: previously ground initial product is exposed in two and more stages to wet grinding in a rotor hydrodynamic cavitation device (2, 7). In a cavitation device the rotor fixed on a driving shaft comprises pump blades, and at least one concentric row of cavitators, quantity of which in the row is a prime number of at least 7 and increases in each subsequent row in direction from a driving shaft to the periphery. Each stage of wet grinding is carried out in a closed cycle with classification of coal-water suspension in size in a device for classification (5, 10). Coarse fraction from the device (10) is returned into the device (7) for grinding. Fine fraction is supplier to a thickener (11). Residue produced in the thickener is divided into two flows, one of which is sent to a mixing device (13) to produce finished fuel. The other is exposed to dehydration at the filter (12), from where it is also supplied to the stage of the finished fuel production into the device (13), where the requested quantity of a stabiliser is supplied.

EFFECT: when using the method, power inputs are reduced due to reduction of energy consumption for grinding.

6 cl, 2 dwg