Engineering & Mining Journal

JUN 2013

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 98 of 171

O N L I N E A N A LY S I S course in Na2O as well, since PRB sodium levels lie below the detection threshold for PGNAA analyzers. Comparisons between the laboratory and the analyzer on three to four hour batches on moisture, calorific value, ash, sulfur and sodium are shown in Figures 6a-6e. Figures 6f and 6g draw a comparison between the performance of the Titan CCA analyzer and another analyzer using PGNAA technology, also on PRB coal. The PGNAA data was taken from a published document from another analyzer supplier. Summary The coal industry has made great strides in productivity over the past quarter century, but it has done so primarily without the benefit of any major technological or significant design improvement in mining equipment. Mining efficiency gains have been largely of the incremental variety, as opposed to step jumps. This has been especially true with online analyzers. However, there now appears to be an innovative pair of technologies found in a single instrument from Progression Figure 6g: Comparison with PGNAA on sulfur, ash and moisture. Inc. that could be the process control breakthrough the market has been waiting for. Richard Woodward is a consultant, specializing in online coal analysis, JUNE 2013 • E&MJ 97

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