 Inspiration
Mines, Inc.
Austin Gold Venture Project
Austin, Nevada
For the Austin Gold Venture project of Inspiration Mines, Inc.
at Austin, Nevada, Roberts & Schaefer furnished engineering
design services. The facility processes 1,000 TPD of highly variable
ore, producing a flotation concentrate for transport to an off-site
smelter, and the casting of doré bullion. Ancillary facilities
(administrative offices, change house, laboratory, warehouse and
shop areas, parking and fencing) were included in the design.
Crushed ore from storage moves for grinding to two 400 HP ball
mills, which are arranged in closed circuit with cyclones. The
cyclone overflow is directed to a flotation circuit, which reports
to rougher cells and two stages of cleaners. Thickened concentrates
are dewatered for shipment. Thickened rougher flotation tails
are pumped to a carbon-inleach circuit, followed by electrowinning
and casting. Leach tails are pumped to a pond, with reclaim water
returned to the leach circuit. Where possible, used equipment
was included in the facility.
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