What exactly is 'Work Index' and how can I make use of it - Metcom .W is the work (energy) input per ton. F80 is the 80% passing size of the circuit feed, and P80 is the 80% passing size of the circuit product, in microns. . (W) it would use to reduce this ore from a very large size to a P80 of 100 um. For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index.input size how big before crushing,Equipment Sizing: Crusher or Grinding Mill - Mineral Processing .Oct 23, 2016 . 1.1 Sizing a Crusher using >1200 Wi of Ores from Database; 1.2 How to .. Let W represent the work input in Kwhr/T, F the feed size or diameter in . calculated Work Index for large differences between the product and feed.
input size how big before crushing