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 97 of 171

O N L I N E A N A LY S I S time, looking for any trends that might threaten a contract limit. He, too, can direct a mitigation response, to restore a cushion in coal quality vis-à-vis contract limits. There are tangible benefits that the analyzer brings to the mine. With the analyzer, the mine has increased its ability to communicate with the pit production operators and troubleshoot quality variances, and they can more readily respond to adverse quality trends not apparent from the core data. Having coal quality information on a real-time basis is especially critical when the mine is loading trains back to back, in order to avoid backing up rail traffic or losing a train altogether. Analytical Results Figure 6f: Comparison with PGNAA on Btu/lb. trends in sulfur, ash, moisture, Btu/lb and Na2O ash fraction, and ascertain whether any of the contract specs are at risk. If they are, a team makes a quick mitigation decision that may consist of either guidance to the shovel operators or in extreme cases reassigning one or more haul trucks to the higher quality location. In addition, the control room operator tracks the silo qualities in real Inasmuch as the mine already had a two-stage sampling system on the silo feed belt, lab vs. analyzer comparisons for performance assessment were straightforward. Performance data from a three-week period in February 2012March 2012 showed that the Progression unit was outperforming other elemental analyzers particularly in calorific value and moisture, and of COMPANY PROFILE- PAID ADVERTISEMENT ANDRITZ SEPARATION offers the widest range of Solid-Liquid Separation equipment and solutions to meet all your mineral processing requirements. ANDRITZ's experience in mineral processing spans many decades and covers an extensive list of mining applications, including Alumina, Coal, Potash, Iron Ore, Copper, Gold, Silver, Platinum, Molybdenum, Zinc, REE, Uranium, Oil Sands, Lithium, Calcium Carbonate and many others. 96 E&MJ • JUNE 2013 ANDRITZ helps you choose the best solution for your needs: Thickeners • Welded or bolted designs • CCD Circuits with Interstage Mixing feature Filters • Filter Presses—Sidebar & Overhead • Hyperbaric Disc Filters • Horizontal Belt Filters • Vacuum Disc Filters • Vacuum Drum Filters • Belt Filter Presses • Linear Screens Centrifuges • Decanter Centrifuges • Screen Bowl Centrifuges • Pusher Centrifuges • Peeler Centrifuges • Screen Scroll Centrifuges • Gypsum Basket Centrifuges Fluid Bed Dryers • For Drying and Cooling Conveying Systems • Belt, screw, bucket and other types of conveyors Laboratory and pilot testing are available. Call us to discuss your solid-liquid separation needs. ANDRITZ SEPARATION Inc. 1010 Commercial Blvd. South Arlington TX 76001, USA Phone: +1 (817) 465 5611, Fax: +1 (817) 468 3961,

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