Martabe, North Sumatra - Mining Technology | Mining …
Mining of waste will peak after two or three years of operation, reducing the costs in the initial mine life. Ore processing The ore will be treated using 4.5 million tonnes of ore per annum using proven SAG and ball milling, and carbon-in-leach (CIL) technology. Recoveries are expected to average 76% for gold and 55% for silver.