A company was using an Excel workbook to determine ROM stockpiling, reclaiming, and Mill feed blending schedule. The ROM was stockpiled by stope with in-situ Cu:S between 0.1 and 0.5. Limited ROM stockpile capacity reduced the ability to retain material for future blending. Other constraints in the value chain were the crusher and crushed ore bin capacities. To complicate matters, they also added materials hauled from a smaller, nearby-mine with significantly different quality and unexpected variations in relevant impurities.
Using the BlendOpt and collaborating with Paradyn, the customer investigated how changes to ROM stockpile definitions, combined with optimization of reclaim across time, impacted Cu and Cu:S mill feed quality and stability.
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