How to Size a Ball Mill -Design Calculator & Formula - 911 MetallurgistApr 8, 2018 . Estimation based on FLSmith (Krebs) Capacity Correlation. Ideally, design value should not exceed 13 psi. If higher, increase # of Cyclones or Cyclone Diameter. Mill Feed (incl. Recycle), Flow Number. ton/hr, m3/hr, FLOW NUMBER: Direct Circuit: Keep < 4 to assure sufficient slurry transport capacity of the.formula for calculating capacity of a rod mill design,Mill Throughput Capacity2, Scope :The SAGDesign_Mill_sizing spreadsheet was designed to determine the most appropriate mill dimensions andoperating conditions for a given . 3.35 mm and is subjected to the Bond ball mill work index (Sd-BWI) grindability test to provide the total pinion energy at the specified grind size for mill design purposes,.