Lydian International has reported additional metallurgical results from the Amulsar gold project located in Armenia. This gold project is of high-sulfidation style that has a CIM compliant indicated resource of 2.1 Moz of gold at 0.98 g/t and an inferred resource of 1.1 Moz of gold at 0.92 g/t.
The company conducted test work at Kappes, Cassiday & Associates (KCA) on half core reserve samples, surface outcrop and whole core obtained from metallurgical diamond drill-holes, as a part of demands in metallurgical test work program for the Amulsar full feasibility study (FFS).
Column leach tests and intermittent bottle roll cyanidation are included in the KCA test work program. The leach recoveries of silver vary due to the presence of mineralized silver at the Amulsar project.
Rapid leach kinetics is displayed in the column leach tests. The final full scale design will utilize a leach cycle of 110 days, depending on these laboratory leach cycle times.
The average consumption rates of lime and cyanide were 2.01 kg/t and 0.20 kg/t, respectively. The consumption rates of cyanide have reduced corresponding to the column leach tests carried out at Wardell Armstrong International, due to the optimization of the cyanide dosage addition.
The company has corrected laboratory column leach test recoveries in order to include metal losses, and inefficiencies emerging from percolation present in the heap. The average gold leach recoveries obtained from the test results of column leach recovery have been corrected by removing 5% in order to consider full-scale leach performance.
Source: http://www.lydianresources.com/