The analysis presented in this paper is relative to the application of AVR to a Merrill-Crowe operation, however AVR has broad applicability to most cyanide-containing pulps or clear solutions. In general, an AVR plant can recovery cyanide from a solution or pulp containing 150 mg/L or more of WAD cyanide for less than the purchase price of sodium cyanide. In addition, since an AVR plant recovers most of the cyanide contained in tailings pulp or barren solution, leach circuits can be operated at vary high cyanide concentrations with only a minor increase in the overall cyanide consumption. For proposed silver leaching operations, incorporation of an AVR circuit would significantly reduce concerns associated with optimizing silver extractions while minimizing he leach cyanide concentration since a majority of cyanide would be recycled with an AVR process.
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