OPERATIONS Americas Region
|CERRO CORONA||SALARES NORTE|
|Mining method||Open pit||Open pit|
|Operational infrastructure||Cerro Corona mine operates one open pit and one copper-gold flotation plant. The mining administration and maintenance facilities are located at the mine.||Infrastructure consists of mine and plant facilities, warehouse, camp, offices, on-site power station, fuel station, a potable water plant and water treatment plant. Water will be supplied from a well field 12km from the project.|
|Mineral processing and TSFs||
The processing plant consists of a conventional primary crushing, semi-autogenous grind (SAG)/ball
milling and flotation circuit to generate a copper-gold concentrate. The final concentrate is thickened
and filtered before being stockpiled for road transport (380km) to the Salaverry port for shipment to
copper smelters in Japan and Germany. The thickened rougher flotation tails and the cleaner
scavenger flotation tails are transferred individually to the TSF.
TSF embankments are constructed in a downstream/centreline manner and located downstream from the process plant over the Las Gordas and Las Águilas gorges. The embankments (Las Gordas, Las Águilas and La Hierba) are being constructed progressively with borrow materials from limestone quarries. The embankments contain a clay core constructed from pit material (oxide material). The TSF has a remaining LoM storage capacity of ~26.4Mt up to 3,803m relative level (mRL).
The process plant, designed to process 2Mtpa, will be located south-east of the main pit at ~4,500m
amsl. Ore will be crushed, milled and thickened with thickener underflow pumped to cyanide leaching.
Slurry from the leaching stage will feed a counter-current washing and solid liquid separation process
through a two-stage counter-current decantation (CCD) circuit. Metals in the solution will be recovered
by zinc precipitation in the Merrill-Crowe process. Soluble gold and silver remaining in the tailings
slurry obtained from the underflow of the second CCD stage will be scavenged by a CIP circuit.
The dry stack TSF, located above the south mine WSF, has a total design capacity of 24Mt. Filtered tailings will be transported by trucks to the TSF, spread and allowed to dry to near its specific moisture content before being compacted.