2012-12-03_REVISION - M1980244 - Laserfiche WebLink

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As part of MLE, the solution enrichment circuit was upgraded at the AGADR to allow an option to circulate pregnant solution from Phases I, II and IV PSSAs onto Phase 5 of the AGVLF affecting enrichment of the gold in solution. As part of the enrichment circuit upgrade, pregnant solution from the Phases I, II and IV PSSAs can either be pumped to the pregnant solution distribution tank and into the carbon trains at the AGADR or can be pumped to the enrichment tank for routing to Phase 5 of the VLF. The enrichment tank is an existing tank located adjacent to the barren solution tank and within the existing AGADR containment system. The enrichment tank has a capacity of 100,000 gallons. The potential maximum total amount of solution in circulation at the AGVLF is about 29,100 gpm, distributed equally between the Phases I, II, III and IV of AGVLF and associated PSSAs at an average combined rate of 16,000 gpm (maximum total rate of 19,000 gpm) and the Phase 5 of AGVLF and PSSA at a rate of approximately 10,000 gpm. At any one time, the amount entering the AGADR for gold recovery is no more than approximately 17,000 gpm and averages approximately 16,000 gpm. As part of MLE2, two steel pipelines will be constructed from the AGADR to the SGADR to allow transfer of fresh water and barren solution from the AGADR to the SGADR. The barren solution pipeline will be 24 inches in diameter and will be double - walled where it runs on unlined ground. The fresh water pipeline will be 12 inches in diameter. Water and barren solution will flow through the pipelines partially by gravity flow and partially by pumping. 8.1.1 Process Solution Enhancement System ( "PSES ") Process solution. upstream from the carbon trains within the AGADR will be directed to and from the PSES. through the AGADR facilities, then acain to and from the PSES. The subsequent enhanced barren solution will then be distributed onto the AGVLF as currentl\ desiuned. The attached Block Flow Diauram. Drawinu No. 10- 100 -03. outlines the conceptual flow paths. The follow inc is a bit more detailed explanation of the desiuned flow path and maximum flows: A maximum of approximately 20.000 gpm of flow from the pregnant solution head tank ("Pree Tank " ") will proceed to the Process Solution ( " ") Stabilization tank within the PSES. This will allow the PS to reach an equilibrium state within the tank. Approximatel■ 4.000 apm of PS will be directly diverted to the Splitter Box. located at the head of the Comae 'Trains. Approximately 16.000 epm of PS w ill be pumped to the AGADR to be processed in the existinu carbon trains, and then proceed back clown to the PSES to the Splitter Box. Cripple Creek & Victor Gold Mining Company Cresson Project Mine Life Extension 2 8 -4 Formatted: Tab stops: 1.19", Left + Not at 2.63"