West Red Lake Gold Announces Positive Pre-Feasibility Study Results for Madsen Gold Mine with $315M After-Tax NPV and $70M Average Annual Free Cash Flow

At steady state operation, an average of 800 tpd of material will be processed in a plant that consists of primary crushing, followed by grinding to 80% passing 75 µm using a semi-autogenous grinding mill and ball mill. Gravity concentration will recover gold from the SAG screen undersize and ball mill discharge. Cyclone overflow will be thickened to 50% solids in a pre-leach thickener, then pre-aerated with oxygen followed by a 24-hour cyanide leach at a cyanide concentration of 150-170 ppm and a pH of 11.0 in five leach tanks. Gold in solution will then be recovered via carbon-in-pulp (CIP) adsorption in six CIP tanks with a residence time of five hours, followed by acid wash, elution, and refining to produce gold dore on site. Read More