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美国新奥尔良PT弗里波特·印度尼西亚公司的埃兹伯格(Ertsberg)铜-金露天矿于1972年开始开采。选厂处理量为7,500t/d。在发现埃兹伯格·伊斯特(GBT)矿体之前的数年间,选厂一直保持上述处理量。此矿体的发现促成了从1981至1988年间3个阶段的成功扩建工作,使处理量增加到2万t/d。1988年大型格拉斯伯格矿斑岩铜矿床的发现揭开了大规模扩建的序幕。在1989年首先安装了第4台一段磨机,使处理量增加到3.2万t/d。然后对破碎厂和筛分厂进行扩建。1991年在南部新建了一座选矿厂,使处理量增加到5.7万t/d。1993年新增加的一段球磨机以及对原丹弗浮选机的更换,使处
The Ertsberg copper-gold open pit of PT Freeport Indonesia in New Orleans, United States started mining in 1972. Processing plant capacity of 7,500 t / d. In the few years prior to the discovery of the Ezberg East (GBT) ore body, the plant maintained the above capacity. The discovery of this ore body led to the successful expansion of three stages from 1981 to 1988, increasing the treatment capacity to 20,000 t / d. The discovery of the large-scale Grasberg ore porphyry copper deposit in 1988 opened the prelude to large-scale expansion. In 1989, the first four mill was installed, increasing the capacity to 32,000 t / d. Then the crushing plant and screening plant expansion. In 1991, a new concentrator was set up in the south, increasing the treatment capacity to 57,000 t / d. In 1993 a new section of the ball mill and the replacement of the original Denver flotation machine, so place