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Determination of work index in a common laboratory mill

Abstract:

The Bond work index is one of the most useful and interesting parameters used in designing grinding equipment. However, it must be obtained under restrained conditions, especially in regards to the Bond standard lab mill. The main objective of this study is to show how this index can be obtained using a Denver ball mill, which is present in most mineral processing laboratories. The methodology consisted of carrying out a series of determinations in both mills (following the Bond procedure) and then comparing the results for different materials having a wide range of grindability. An analysis of the results shows a direct relationship between the Bond work index and the Denver work index when the Bond test is defined adequately to the Denver lab mill. Copyright 2006, Society for Mining, Metallurgy, and Exploration, Inc.