Mill grinding wikipedia.With the limits of bonds range upper d bu 50 mm and lower d bl 005 mm w is the work index measured in a laboratory ball mill kilowatthours per metric or short ton p 80 is the mill circuit product size in micrometers f 80 is the mill circuit feed size in micrometers.
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Work index covering grinding of fine particles is labelled m ib morrell, 2008.M ia values are provided as a standard output from a smc test morrell, 2004a whilst m ib values can be determined using the data generated by a conventional bond ball mill work index test m ib is not the bond ball work index.Get Price
Here is an overview of the bond tests available at sgs modbond grindability test.Similar to a comparative work index, this test is an open circuit dry batch grindability test run in the standard bond ball mill for a set time.It can be used at mesh sizes from 65 to 200 mesh normally 100 mesh.Get Price
The work index for a ball mill, wi, is then calculated from the following equation.7 where p is the closing sieve size m, gbp is the grindability net grev., f80 and p80 are the 80 passing size of the feed and the product m, respectively.Recently the bond equation was revised to improve.Get Price
The bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed.It provides the bond ball mill work index which expresses the resistance of material to.Get Price
A bond ball mill work index is then performed on the mill product for the design of sag-ball mill circuits.This is important because it was found that there was a 11.5 kwht higher ball mill work index if the 3.35 mm ball mill test feed size is obtained by sag mill grinding compared with crushing.Get Price