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Rio Tinto’s Nuton Tech yields 99.99% pure copper at Arizona mine, zero-smelt, renewable-powered.
Rio Tinto has produced the first copper using its Nuton Technology at Arizona’s Johnson Camp mine, a breakthrough after 30 years of development.
The bioleaching process, using on-site microorganisms, generated a 99.99% pure copper cathode without smelting or refining.
The four-year demonstration aims for 30,000 tonnes of production, with low carbon emissions and water use.
The project uses 100% renewable energy and could unlock uneconomic deposits and extend mine life.
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Nuton Tech de Rio Tinto produce un 99,99% de cobre puro en una mina de Arizona, cero smelt, con energía renovable.