Choosing a SAG Mill to Achieve Design Performance - Starkey .the correct power required to grind ore in a SAG mill, by developing ore hardness variability functions ... Critical speed is calculated from the following equation:.how to calculation critical speed of sag mill,Predicting SAG/AG Mill and HPGR Specific . - 911 Metallurgistlaboratory scale HPGR testwork can be used to determine specific energy . AG/SAG mill and HPGR circuit performance. 2 ... φ = mill speed (% of critical).The engineering and process effects of choosing a motor design .specification of the “design” and “maximum” speed of grinding mill motors. . calculated from its rated power and its rated speed (at the knee-point) according to . the mill speed as a fraction of the critical speed, ϕC, can be observed by plotting.
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