Cascabel copper/gold/silver project, Ecuador

Articles can be saved for quick future reference. This is a subscriber benefit. If you are already a subscriber, please log in to save this article. If you are not a subscriber, click on the View Subscription Options button to subscribe. At peak production, the mine will yield 216 000 t/y of copper, 734 000 oz/y of gold and 1.16-million ounces of silver a year.Following a ramp-up period of about two years, the initial cave will achieve a production rate of 12-million tonnes a year.

The mining operations will be expanded by an additional 12-million tonnes a year, increasing to a total production rate of 24-million tonnes in Year 6 of mine production. Ore from the mine will be transported to the underground primary crushers by load, haul, dump loaders and crushed to -160 mm. The crushed ore will be conveyed directly to the coarse ore stockpile adjacent to the mill at the surface.

Ore will be reclaimed from the coarse ore stockpile and conveyed to a conventional semiautogenous grinding ball mill crusher circuit. Slurry from the ball mill will be pumped to the flotation circuit, where concentrate will be floated, filtered and stored for transport by truck to the port site concentrate storage barn. Tailings will flow by gravity to the tailings storage facility.The new PFS shows the project to have a pretax net present value, at an 8% discount rate, of $5.

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