Batch ball mill using 10 horsepower and 1 inch diameter ceramic balls Production rate 12 gallons per hour (192 gallons each 16 hours) Grind reading, 7 Hegman INVENTIVE METHOD Presently disclosed mill using 10 horsepower, and 15 mm modified ceramic ball, continuous flow process at 2049 gal per hour Grind reading71/2 (625 microns) Hegman