The patent-protected flowsheet uses the same front-end as traditional cyanidation-based processing, but where cyanidation oxidises the gold to make gold cyanide, the Cycladex process leaches gold from ...

Refractory gold ores present significant challenges to conventional extraction methods. In these ores, gold is tightly encapsulated within sulphide minerals or locked by carbonaceous matter, thereby ...

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Dear EarthTalk: Most gold mining operations use cyanide to extract gold from surrounding rock. What are the environmental implications of this, and are there alternatives? --J. Pelton, via e-mail ...

Romania’s prime minister, Mihai Tudose, recently raised the prospect of reopening the country’s huge Roșia Montană goldfield. The area had been mined from Roman times until the last state-run ...