includes atomizing nozzles 62 the nozzles 62 atomize the cooling fluid directed to the radial blades 54 by atomizing the fluid prior to contact with the blades 54 it has been found that the amount of water used with the atomized system is decreased by 90 or more moreover it has been surprisingly found that the cooling properties of the fluid mist provide much greater cooling efficiency for the same amount of water as compared to just a conventional spray that is not atomized the atomized fluid also provides efficient dust control for the grinding operation the resulting slurry has substantially less mass and volume than the slurry that may be collected using a conventional sweeper vacuum or other collector 102 and disposed of in an environmentally safe manner the use of the atomizing nozzles 62 substantially decreases the amount of material that must be disposed of and eliminates the need for a large cyclone separator in addition to using a sprayer assembly with atomizing nozzles to improve the effectiveness of the atomizing spray an air manipulator 80 is positioned above the sprayer assembly 60 as shown in fig2 and 5 the air manipulator 80 includes a block 82 in close contact with the radial blades 54 the block 82 is typically plastic or other relatively soft material that may be easily cut by the blades 54 to form a slot for each blade with the portions 84 extending between the blades for a close fit as the blades 54 rotate relative to the air manipulator 80 the block 82 is biased by a spring 86 towards the blades so that the tight contact is maintained and.