After 154 years of digging at Morenci, all the easily recoverable copper has been mined. Left behind are towering piles of waste rock that hold nearly 10 million tons of the metal seen as critical to global electrification. It’s a cache that could prove key to President Donald Trump’s ambition to boost US production of critical minerals.
Freeport-McMoRan Inc., which owns Morenci, is trying to develop technology that can burrow within those gigantic waste piles and extract low-grade copper that miners previously saw as too expensive and difficult to process.
“For a long time, we just didn’t think it was possible to recover any of this stuff,” said Robert Pollock, Morenci’s site manager, gazing up at a waste pile the size of a Manhattan office building. “But now, all this historical copper – we’re going after it.”
Source – Bloomberg
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