Show ORE CRUSHING efficiency A correction through the unaccountable omission of the key explanation of the dia diagrammatic dramatic drawing that accompanied mr 0 A gates article on ore crushing efficiency in the january issue of the mining review much of the technical value of the article was lost so that engineers b and ore milling experts may get the full benefit of the authors effort to help in the solution of crushing problems the drawing is reproduced herewith with the key notes attached as follows 0 dalt TER ot tv N i A t 7 s farl ae r s foa e sew V M w 4 1 r P i j as s W SO w L es MUM naf 75 7 w oc H 0 25 W r aso 0 t r als 17 1 I 1 k K t c U 0 i 21 2 Vs G S p N F W asi r J sa b K jf aff 27 7 N 0 o aa 3 00 t as 1 7 as H L 7 s J i 0 classifying SYSTEM circulating FEED area AG surface in feed done by in nii uius ining crushers crashers etc area DF br in ii sands by ii b y classified circulating area CG surface in combined feed A G and il 11 F hy by totaling ordinates di nates natem area CD surface prod produced need avy 1 mill on combined feed area AE A E surface prod produced need ivy it mill on original feed CD C D assuming 80 mesh tine fine enough for liae procesa sn then area FUH F U 11 H 11 surface in classifier sands uselessly returned to sy system oystein stein area X J C surface in mill feed all plus plum SO 80 mesh area X J 3 JK J IC surface in probable product from froin CX CJ C X J feed tons finished |