Common Basic Formulas for Mineral Processing Calculations20 03 2016· Short Tons of Solids Imp gallons of solution per min 5/36 x W/L R R1 U S gallons of solution per min 1/6 x W/L R R1 Simple Classification To estimate the circulating load in and the efficiency of a classifier operating in closed circuit with a ball mill Original feed may be applied at the ball mill or the classifier T—Tons of