Polyus Completes Verninskoye Mill Expansion
Polyus also completed a number of initiatives to upgrade the crushing and grinding circuit at Verninskoye. This included the installation of an additional crushing circuit, which included a ball mill and two vibrating screens in the extension of the main building. An additional cone crusher and screens were installed to reduce recirculation and increase the throughput capacity of the existing SAG mill. The gravity concentration circuit was equipped with additional centrifugal concentrators and a hydrocyclone unit, which were also installed in the main building extension.
As part of the project, Polyus said it implemented a number of initiatives aimed at improving gold recovery, including the installation of an additional reactivation kiln, as well as installation of an additional centrifugal concentrator. This resulted in the recovery rate at Verninskoye reaching nearly 90% in February.