Operations
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Doyon Division Gold Mines, Québec

Mining & Processing

Mining

The mining method used at the Doyon Gold Mine is sub-level stoping with paste backfill. At the Mouska Gold Mine, shrinkage stoping and long hole stoping are used. All ore extracted from the Doyon Division is processed onsite.

The Doyon mine has both a shaft and a ramp for mobile equipment access. Once the ore has been mucked from the drawpoints, it is transported to the nearest ore pass and goes to one of the two crushers. Once crushed, the ore is loaded into skips from one of two automatic loading stations and hoisted to surface by the production hoist. At surface, the ore is transferred to the ore bin and then onto the mill for processing.


Processing

The 3,500 tonnes per day Doyon processing plant uses the carbon-in-leach (CIL) and carbon-in-pulp (CIP) processes to recover gold and produce gold bullion from Mouska ores and flotation. These produce a gold bearing copper concentrate that is then shipped to a smelter for final metal recovery. Copper is a by-product and is credited against Mouska’s production costs.

The Doyon Gold Mine facilities and equipment include a conventional mill equipped with a SAG mill and cyanidation and CIP processing facilities, a flotation circuit, a high-density sludge plant, a water treatment plant, a tailings pond and settling pond, electrical and mechanical maintenance shops and a headframe, mechanised mobile underground equipment, as well as a warehouse, a paste backfill plant and an administrative building.

Mouska Gold Mine’s principal facilities include a headframe, a service building housing electrical and mechanical shops and an administrative office. Access to underground is via a main shaft of 485 metres and an internal shaft of 560 metres. The internal shaft is located 1.2 kilometres east of the main shaft.