Mineral Processing Circuit

This section outlines the proposed recovery methods for the Frances Creek Prospect, which is currently in the exploration stage. While NI 43-101 does not require recovery details for exploration projects, Voyageur has developed a conceptual milling plan to benefit potential investors. The plan involves on-site crushing and gravity separation of barite, followed by off-site milling and acid washing to produce high-purity barite powder.

This Feasibility Study Update for the Bayan Khundii Gold Project presents a Class 2 estimate based on a complete engineered design. The process plant is designed to handle an annual throughput of 650,000 tonnes per annum (tpa), processing ore with an average gold head grade of 3.98 g/t. The design incorporates Mongolian structural standards alongside Eurocode guidelines to ensure comprehensive engineering compliance. The study confirms that the ore is amenable to conventional cyanide leaching with recoveries averaging in the low to mid 90s, specifically targeting a 92.7% recovery rate over the life of mine.

The White Pine North Project Preliminary Economic Assessment outlines a process plant design focused on producing copper concentrate. The facility is engineered for a nominal throughput of 15,000 tons per day, utilizing a flowsheet that includes grinding, classification, rougher flotation, and a three-stage cleaner flotation circuit employing both flotation cells and columns. Final concentrate processing involves thickening and filtration, with tailings managed via pumping to a common Tailings Disposal Facility.

The metallurgical process objective is to obtain gravity and flotation concentrates in a plant with a capacity of 500 tonnes per day (tpd). The plant will be composed of a single production line in two conventional processes namely gravity followed by flotation to obtain sulphide concentrates containing gold. The process path involves a dry section consisting of crushing (primary and secondary stages) and milling and a wet plant comprising gravity concentration, flotation and filtration of concentrates where gold is recovered.

This technical report outlines the recovery methods for the Ruby Creek Project, referencing previous feasibility studies by Wardrop Engineering and MinnovEX. The process plant design aims to produce a final molybdenite concentrate with a grade of 54% molybdenum and an overall recovery rate of 90% from a feed grade of 0.087% molybdenum. The circuit is designed to operate at an average throughput of 20,000 metric tonnes per day with a plant availability of 92%.

This NI 43-101 Technical Report and Preliminary Economic Assessment outlines the proposed recovery methods for the Terakimti Oxide Deposit within the Harvest Project in Ethiopia. Based on test work conducted by BCR in 2013 and SGS in 2016, the oxide zone is amenable to conventional cyanide leaching. The study proposes heap leaching technology over agitated tank leaching due to satisfactory gold extraction kinetics, lower capital and operating costs, and reduced project complexity.