Global Mining Guidelines Group (GMG) DETERMINING THE BOND EFFICIENCY OF INDUSTRIAL GRINDING CIRCUITS|3 (equation 5) is equal to the inverse of the Wi Efficiency Ratio; it can be used by multiplying against the laboratory-derived WiSTDto give the actual operating work index of a circuit, WioACT WioACT
Get MoreCalculations involving Bond’s work index are generally divided into steps with a different Wi determination for each size class The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index ( WiC, CWi or IWi (impact work index))
Get MoreBond Standard Circuit Work Index: Assume the rod mill Work Index of 95 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod µ mill (circuit) product size of 1,000 µm W Total = 232 + 477 = 709 very large size (FkWh/t of 970 .
Get MoreNov 01, 1998· 高达10%返现· Using the Bond work index to measure operating comminution efficiency C A Rowland 1 Mining, Metallurgy & Exploration volume 15 , ,
Get MoreJun 06, 2015· This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore sampl These equation application methods are used to process
Get MoreBOND WORK INDEX The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore The Bond's Work Index equation is: W=WI* (10/√P80 -10/√F80) where W= the energy input (Work input) per ton, kwh/metric ton WI= Work Index= specific energy per ton, kwh/metric ton (characterizes the ore)
Get More2018-2-20 Bond Standard Circuit Work Index: Assume the rod mill Work Index of 95 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a ,
Get MoreThe Bond work index is a parameter which represents a measure of an ore resistance to grinding Numerically, the work index represents the energy ( kWh/sht) required to reduce the ,
Get MoreJun 06, 2015· 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 charge Seal the mill Rotate for 20 revolutions to clean
Get MoreSep 13, 2017· Efficiency = Wio/Wi x 100 When (Wio/Wi)x100 is less than 100 this indicates the circuit, based upon this comparison, is operating efficiently When it is greater than 100 this indicates the circuit is operating inefficiently A large difference, either low or high, could indicate that the two work indicies are not on the same basis
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