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The ambitious expansion was expected to create

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A JP Morgan research note out a few weeks later also suggested the Olympic Dam would not go ahead "for at least three or four years, if at all.”Copper bubbles in a flotation tank at BHP's Olympic Dam mine.
Then in September, chief executive -Andrew Mackenzie said the long awaited expansion was in need of a technological breakthrough that can make it happen.The ambitious expansion was expected to create the world's largest uranium mine within 11 years.
It included the construction of 270km of power lines, a 400 km pipeline, a new desalination plant and a 105km railway.The miner has been searching for cheaper ways to develop new smelting and extraction technologies to cut costs and offset lower commodity prices.One of the processes it has been testing is heap leaching, a complex chemical process used to , uranium and precious metals from ores.

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