Novel size and shape measurements applied to jig plant performance analysis
Journal of the Southern African Institute of Mining and Metallurgy
DebTech, De Beers Group Services (Pty) Ltd., South Africa; Kumba Iron Ore Ltd., South Africa
Iron ore samples representing the input and output of several jigging experiments were analysed to determine the effect of particle size, shape, and density on jigging performance. Traditionally, the manual measurement of the size and shape of individual particles is very tedious and prone to inaccuracies and inconsistencies. Using a novel multi-view imaging technique the 3-dimensional representations of each particle in the sample was determined. From this representation several size and shape measurements were extracted, and these were correlated with the individual particle density measurements. A rigorous investigation into the confidence associated with density and the size and shape features as a function of sample size was conducted, thus allowing the significance of correlations in the data to be determined. The jig's performance was seen to be clearly sensitive to density and markedly so to particle size, while the results for shape indicated the need for continued work in the definition of particle shape. © The Southern African Institute of Mining and Metallurgy, 2012.
3-dimensional representation; Individual particles; Input and outputs; MDS; Multi-views; Particle shape; Plant performance; Sample sizes; Shape; Size; Size and shape; Density (specific gravity); Imaging techniques; Iron ores; Jigs; Particle size