## Closed crushing circuits with nomographs

Another equation proposed earlier (Allis-Chalmers, 1953; Flavel, 1977) gives the circulating load ratio Rg as a function of e and x, 1 1 x e Rg (2) where e is the % efficiency of the oversize removal, 100 x u is the percent oversize in the crusher discharge, and Rg is the circulating load ratio expressed as fraction of the new feed F. But, since 100 e r, Eq.