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ENHANCED EVAPORATION FOR IMPROVED FLUID MANAGEMENT OF LOW PH/SUPER SATURATED DRAIN DOWN FLUIDS
Bonner, D. and T. Phelps. | Technical Sessions: Smart Mining: Resources for a Connected World, 24-27 Feb 2019, Denver, Colorado, 2019

At the Yerington Mine, a fluid management system (FMS) is operated and maintained to control drain-down fluids associated with several heap leach pads (HLPs). Fluids in the FMS ponds are low pH (typically ranging from 1.9 to 2.7) and show high total dissolved solids (with average values up to 381,000 mg/L). To improve removal of fluids from the system without off-site disposal, an enhanced evaporation system was installed on top of one of the HLPs with operation occurring during the summer months of 2017 and 2018. Fluids are routed to one of several evaporation ponds where they are removed via active evaporation, which is reasonably effective given the climatic conditions present at the site. More information: https://ndep.nv.gov/uploads/land-aml-docs/20180205_ACMS_IAOC_App_E_ROD-1.pdf



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