Mineral Processing Circuit

The 2026 NI 43-101 Technical Report for the La Plata Project, specifically focusing on the Allard Cu-Ag Porphyry Deposit, outlines conceptual metallurgical studies regarding recovery methods. The proposed flowsheet suggests sequential recovery techniques, starting with copper sulfide flotation, followed by magnetic separation for magnetite, flotation for apatite, and gravity concentration for heavy minerals like zircon. These pathways are noted as commonly employed in similar mining operations targeting specific mineral concentrates.

This Preliminary Economic Assessment (PEA) outlines the recovery methods for the Coles Hill Uranium Property, focusing on an alkaline processing circuit designed to extract uranium from underground ore resources. The project utilizes a standard mill and yellowcake facility configuration, employing carbonate reagents for leaching to maximize internal water recycling and conserve reagents. The design assumes a 35-year mine life with an average head grade of 0.098% U3O8 and a mill leach recovery of 85%.

This section of the NI 43-101 Technical Report details the recovery methods for the Magistral Project, focusing on the modification and operation of an existing processing plant. The plant is designed to treat the Magistral tailings deposit with a nominal throughput of 1,000 tonnes per day. The flowsheet includes grinding, cyanide leaching, countercurrent decantation (CCD), SART (Sulfidation, Acidification, Recycling and Thickening), Merrill-Crowe precipitation, and cyanide destruction circuits.

The South Deep processing facility is designed to treat 330,000 tonnes of ore per month, with a name plate capacity of approximately 4 million tonnes per annum. The plant currently treats a combination of underground ore and reclaimed tailings, utilizing a semi-autogenous grinding (SAG) and ball mill circuit integrated with gravity recovery, thickening, leaching, CIP, elution, and electrowinning technology.

Intergeo’s December 2011 report, based on a Hatch scoping study, targets a 9.0% Ni concentrate at 61.9% nickel recovery and adds valleriite recovery options to Gipronikel’s older design.

The Goldex Mine Technical Report dated October 14, 2012, outlines the recovery methods and processing plant status for the Goldex Mine. The plant was commissioned in 2008 and operated until October 2011, when mining was suspended and the facility entered care and maintenance. The report details a feasibility study proposing a reopening in 2013 with a design throughput of 5,100 tonnes per day.