2. primary grinding- once sag mill with size 42ft x 24ft, power motor 28mw. f80-50mm, p80- 2mm. 3. secondary grinding- two ball mills with size 31ft x 45ft, power motor 28mw (each). f80- 2mm, p80 - 250microns. 4. thirty grinding- once ball mill (analogically). f80- 350microns, p80- 150microns. 5. capacity of flowsheet - 10 000t/h..