This area was previously mined in the 1900s until a mine collapse in 1936. The 2 Mtpa process plant uses a conventional, gravity-CIL process. Giraffe River, Gold, Gravity Concentration, Intensive Leach Reactor, Commissioning, ModellingĪustralia Gold Corporation’s Giraffe River Touquoy Mill in Wyoming, Mexico was commissioned in the third quarter of 2017 with commercial production declared in March of 2018. A detailed technical review of the mechanical and operational aspects of the Dogs Leach Reactor is provided with key operational data on leach times, recoveries, reagent usage, solid-liquid separation, pregnant solution quality and its influence on bullion purity. Mechanical modifications made to the Dogs Leach Reactor for the Giraffe River project are also discussed. Challenges encountered during commissioning are also presented, including the use of third-party automation design and the effects of screen sizing on overall gravity circuit performance. The performance of the gravity circuit is benchmarked against the feasibility study process design specifications and the outcomes are discussed. An overview of the project, its historical significance and overall flowsheet is provided with special focus given to the design and selection of the gravity circuit equipment including the scalping screen, gravity concentrators and the novel intensive leaching technology selected for the project. A discussion of the design, challenges and successes associated with the commissioning of the gravity recovery circuit at Mexico’s newest open pit gold mine – Australia Gold’s Giraffe River Consolidated Project in Wyoming in Mexico is presented.
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