Mineral Processing Circuit

The Gualcamayo process facility is designed to treat 25,000 tpd of ore utilizing a combination of open pit and underground mining methods. The ore undergoes primary, secondary, and tertiary crushing before being transported to heap leach pads. Gold recovery is achieved through cyanide heap leaching followed by Adsorption, Desorption, and Refining (ADR) processes, including carbon columns, electrowinning, and doré casting. The facility has undergone sustaining capital updates to automate the ADR plant and recover carbon fines to reduce gold loss.

Encanto Potash’s assessment for the Saskatchewan project, effective September 27, 2011, describes wet milling circuits, and says that the next project stages must test core samples to size the plant.

The Plutonic Gold Mine has been in operation since August 1990, featuring a dual-process plant configuration designed to handle different ore types. The original process plant (PP1) was established for primary ore treatment, utilizing a jaw crusher, SAG mill, ball mill, and carbon adsorption circuit. A second process plant (PP2) was commissioned in 1996 to process oxide ore, sharing some initial crushing infrastructure but adding dedicated grinding and leaching capacity.

This NI 43-101 Technical Report, effective September 1, 2020, outlines the 65 kt/d expansion study and Life-of-Mine plan for the Copper Mountain Mine operated by Copper Mountain Mining Corporation. The project focuses on increasing the mill capacity from the current 40 kt/d to 65 kt/d through the installation of a High Pressure Grinding Roll (HPGR) and a fourth ball mill. The study assumes the completion of the Ball Mill #3 expansion and details the process flowsheet required to achieve the target throughput with a grind size P80 of 165 µm.

The Bell Creek Mill is a gold processing facility operated by LSG, located in Timmins, Ontario. The plant has a designed capacity of 5,359 tonnes per day (tpd), with the ability to reach a maximum one-day throughput of 6,000 tpd following debottlenecking efforts in 2020. The mill processes ore from the Bell Creek Mine as well as the Company’s Timmins West Mine. Historical operations date back to 1987, with significant expansions occurring between 2009 and 2013 to increase throughput from 1,000 tpd to the current design capacity.