Located on the eastern edge of the Golden Mile, the main gold milling process plant includes coarse ore crushing, fine ore crushing, screening, milling, flotation, filtration, tailings leach, carbon-in-pulp gold recovery and peripheral reagents, water management and tailings disposal systems.
Saline Water System
Saline process water is extracted from 15 bores in the Gidji Paleo Channel stretching 25km northeast from the roaster site. The borefield delivers saline water to a holding dam at the roaster and a transfer system pumps the water 20km to a storage dam at Fimiston.
The satellite roaster plant, located 20 km north of Kalgoorlie, receives gold concentrate filter cake by road transport from the Fimiston mill. It includes a circulating fluid bed roaster which calcines the concentrate to eliminate sulphur, calcine leach, carbon-in-pulp and peripheral reagents, water management and tailings disposal systems.
Loaded carbon from the leach circuit is transported back to Fimiston for elution and gold recovery. It was the first commercial gold circulating fluid bed roaster in the world. An identical second roaster unit has been constructed at Gidji.