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Extractive Metallurgy Chapter of Denver - Dinner Meeting - September 14, 2023

  • 1.  Extractive Metallurgy Chapter of Denver - Dinner Meeting - September 14, 2023

    Posted 08-31-2023 04:53 PM

    The EMCD is hosting a dinner meeting with guest speaker Dr. John L. Uhrie, P.E. presenting on the topic of Sulfide Bioleaching, How Far Can We Go?. 

    When: Thursday, September 14, 2023

    Time: 6 p.m.

    Where: The Club at Rolling Hills (15707 W 26th Ave. Golden, CO 80401)

    Cost: $40 per person, students attendee dinners are complimentary

    ***Please RSVP by Thursday, September 7th by 8:00 PM.  If you cannot RSVP by then, please call me to check availability, we usually plan for a couple extra spots. Philip Keller (303) 974-2151, pkeller@energyfuels.com

    Abstract: Chalcopyrite leaching is dramatically enhanced by elevated temperature.  Field scale heat balance includes sources due to rapid oxidation of ferrous iron and pyrite and sinks of radiation, evaporation, and convection.  Significantly elevated temperature is only possible on supergene ores which are high in pyrite content or contain highly reactive pyrite.  Best field results should be obtained through combined stockpile aeration, fine crushing, controlled irrigation rates, and regular rest cycles.  The economics of primary sulfide leaching could be very favorable at properties where existing capital of excess SXEW, crushing plant, and pad space is available.

    Biography: Dr. Uhrie has 30 years of experience with major and mid-tier mining companies including Phelps Dodge, Freeport McMoRan and Newmont, Doe Run and Energy Fuels, has operated mines on three continents including Latin America and is highly experienced in operations, operations management, project development, exploration, engineering, and startups of copper and gold projects.  He is highly experienced in all aspects of owner's side project engineering as both the process manager and project manager for prefeasibility through detailed engineering activities and is a recognized technical expert in sulfide processing of copper, heap bio-leaching, pressure oxidation, and SXEW.  Dr. Uhrie has authored 20 technical publications and one book, holds 3 US Patents, is a Registered PE (Mining and Minerals Processing), and is a Qualified Professional through the MMSA.  Dr. Uhrie is fluent in English and Spanish.

    Madeline Sova
    Geotechnical Engineer
    Lakewood CO United States