Mineral Processing Circuit

This technical report details the recovery methods and operational performance of the Platosa Polymetallic Mine, operated by Excellon Resources Inc. in Mexico. The mineralized material from the Platosa Mine is transported 220 kilometers to the Miguel Auza processing facility, which has been treating silver-, lead-, and zinc-rich CRD Platosa mineralization since 2009. The facility operates two distinct flotation circuits: one for lead-silver and another for zinc-silver, producing two separate concentrates.

This 2015 Updated Technical Report on the Lincoln Mine Project by Sutter Gold Mining Inc. details the recovery methods and metallurgical testing for the gold deposit in Amador County, California. The report incorporates a comprehensive review by Allihies Engineering Incorporated of previous metallurgical studies, confirming that the proposed conceptual mill design is appropriate based on current data. The project focuses on a gravity and flotation mill circuit designed to process sulphide ore containing arsenopyrite and pyrite.

This Preliminary Economic Assessment (PEA) outlines the conceptual processing flowsheet for the Lac à l’Orignal Phosphate Property. The project involves open pit mining of mineralized material with a nominal capacity of 10,500 tpd. The process is designed to recover three distinct commodities: high-grade apatite for phosphoric acid production, high-purity magnetite, and moderate-grade ilmenite.

This section of the NI 43-101 Technical Report details the recovery methods for the Barry Open Pit Project, utilizing the existing Bachelor Plant. The concentrator is designed for an initial throughput of 800 tpd, with a planned expansion to increase feed to 1,200 tpd to accommodate Barry mineralized material. The development of the new flowsheet prioritizes the use of existing equipment and building space where possible.

The Arctic Project Feasibility Study Technical Report outlines the process plant design for the Arctic deposit, hosted in the Ambler Sequence within a VMS belt. The plant is designed to treat MS and SMS ores with a throughput of 10,000 t/d, operating two 12-hour shifts per day with 92% availability. The process will produce three concentrates: copper, zinc, and lead, with gold and silver recovered in the copper and lead concentrates.