Antamina exploits a skarn deposit through a conventional open pit mine (typical stripping ratio of 3.5) and a 145kt/d ore polymetallic concentrator processing 8 type of ores and producing 5 types of concentrates. At the end of 2015 Antamina was processing above 165kt/d ore in the mill. The concentrates produced are copper concentrate, bornite concentrate, zinc concentrate, moly concentrate and Pb-Bi concentrate. The copper and zinc concentrates are transported via a 302km pipeline to the Punta Lobitos port in Huarmey owned by Antamina.
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