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Abbreviated test for quick determination of Bond’s work index
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2003
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Unknown Venue
The grindability of an ore in the process of mineral dressing can be determined by use of the Bond work index (Wi). This index is determined on a laboratory scale using a Bond ballmill and by simulating dry grinding in a closed circuit until the 250% circulating load has been obtained. This happens only after 7-10 grinding cycles, which shows that the procedure is a lengthy and complex one and is therefore susceptible to procedural errors. Starting from the first-order grinding kinetics defined by means of the Bond ball mill, this paper discusses a simplified procedure for a rapid determination of the work index by just three grinding tests. The applicability of the simplified procedure has been proved on samples of copper ore, andesite and bauxite.