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Home > Mining Companies > Wesdome Gold Mines Ltd. > Articles > Mill Facility
Wesdome Gold Mines Ltd.

Mill Facility

Jul 2, 2020
 
Wesdome initially leased then subsequently acquired the former Magnacon mill and tailings facilities in 1996.  The mill is 17 km by road from the mine.  The mill capacity was increased from 600 to 1,000 tpd in 1999.  Even though the addition of the cone crusher expanded capacity to the permitted level of 1,200 tonnes per day on a crushing basis, required maintenance time means the practical limit is approximately 850 tonnes per day of Eagle River underground ore as it is configured to achieve targeted gold recoveries.
 
The mill employs the Merrill-Crowe process for the recovery of gold from Eagle River ore with about 40% of the gold recovered into a gravity concentrate using a recently installed Falcon gravity circuit concentrator.  The Merrill-Crowe process involves cyanide solution and zinc precipitation.  Precipitate is refined on site to produce doré bars containing approximately 80% - 92% gold.  By-product silver is recovered at a rate of one part for every six to ten parts of gold.  Overall mill recoveries for Eagle River is around 96.5 % and for Mishi ore around 83%.
 
The mill tailings commonly average grades of 0.25-0.50 g/t Au are deposited in the tailings pond.  The tailings are processed through a drum filter in order to thicken them. Water from this process and the pond is reclaimed for use in the mill process as required to minimize the discharge of effluent.  The mill operates 24 hours per day, seven days per week with two crews working 12-hour shifts on a seven days in, seven days out rotation.
 
The TMA consists of the Magnacon tailings pond located to the south side of the mill and the polishing pond located to the northeastern of the mill.  Thickened tailings are transported using a conveyor to stockpiles on the west side of the TMA.  When the stockpiles are large enough, the thickened tailings are re-distributed or pushed down into the TMA using a combination of haulage truck and a dozer.  Thickened tailings have a moisture content of about 22% (dry weight basis) and contain about 32% fine sand, 60% silt and 8% clay size particles. The TMA facility has undergone various phases of modifications between 1995 and 2017.  In 2019, the Company reinforced the existing TMA followed by the vertical raise extension (Stage 4) which provides additional storage capacity for the future. The TMA expansion was about 75% completed at the end of 2019 and will continue in 2020.
 
The Eagle River Mine is supported by two surface settling ponds by the portal while the Mishi Pit is supported by a settling pond to its north to manage water quality.
 

Source: https://www.wesdome.com/operations/eagle-river-complex/mill-facility/

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Career Opportunities
IT Analyst

This position is responsible for supporting end-users primarily at our Eagle River Mine Complex.
Junior Accountant

This position is accountable for supporting accounting processes as well as the processing of accounts payable in a manner consistent with established policies and procedures.
Senior Mine Geologist, Eagle River Mine
• Promote safe work practices and safety culture within a production-oriented environment.
• Maintain drill hole databases and monitor underground diamond drill programs.
• Supervise and participate in the selection of underground diamond drill targets.
Surface Maintenance (Hourly)

Ensure that all buildings, and infrastructures on Wesdome property, as well as roads, culverts, & bridges are properly maintained Work in a safe, environmentally friendly, and cost-effective manner.
Heavy Duty Equipment Mechanic

Heavy Equipment Mechanic is responsible, as part of a team, for maintaining the equipment and mechanical systems of the Eagle River Mine site to ensure smooth and continuous operation.
Maintenance Planner
  • Reporting to the Maintenance Projects, Mobile & Mine Fixed Plant Superintendent
  • Ensuring compliance with health and safety and environmental regulations and policies is of primary importance with this position.
Hoist Mechanic/Millwright

Reporting to the Eagle River Maintenance Planner or designate, the successful candidate will perform the maintenance and repairs of all surface, underground stationary equipment, long hole buggies, compressors rock breakers and pumps at the mine site.
Manager – Asset Management & Reliability

Reporting to the Mine General Manager, the Manger of Asset Management & Reliability will be an inspirational and innovative leader responsible and accountable for operational performance excellence in the Asset Management and Reliability Department.
Process Plant Maintenance Millwright (RED SEAL CERTIFCATION REQUIRED)
  • The Millwright is responsible for doing the maintenance of the milling operation equipment.
  • Reports to Lead hand Millwright and Mill General Foreman
Chief Mine Geologist, Eagle River Mine

The Chief Mine Geologist will be responsible and accountable for all work conducted by the Geology Department while ensuring the work is safe, cost effective and makes the most efficient use of manpower and materials.
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