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Unit Of Work Indexbond Ball Mill Work Index Formula

bond work index procedure and method - 911 metallurgist,the work index (bwi) is calculated according to fred bond’s equation. bond work index for testing procedure cleaning and storing of ball mill charge after the bond work index procedure is done: add about 500 g of silica sand into the mill containing the ball tests |,the test determines the bond ball mill work index which is used with bond’s third theory of comminution to calculate net power requirements*. various correction factors may have to be applied. w = wi (10/√p – 10/√f) where w = net power consumption in kwh/t wi = bond work.amit 135: lesson 7 ball mills & circuits – mining mill,work index. bond estimated the amount of wear in terms of kilograms per kwh based on the abrasion index, a;, i.e., wet ball mill = kg kwh = 0.16(a i-0.015) 0.33; dry ball mill = kg / kwh = 0.023a i 0.5; replacement ball size. rowland and kjos proposed the use of their equation for the determination of the initial and replacement media size..model:bond hpgr and ball mill -,where cf is the essbm calibration factor (in the circuit settings) for ball mill operating work index versus laboratory ball mill work index. a value of zero means use the bond/rowland ssbm formula to predict e ball, a value of -0.05 means use 5% less than bond/rowland ssbm formula to predict e ball. cf is a negative number if wi o is less than the laboratory work index..

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