Nitric acid pretreatment applied to a refractory gold-tellurides ore
Argumedo-Jimenez, Carlos; Chaverra, Dairo E.; Restrepo-Baena, Oscar J.
ABSTRACT:
This paper presents the results obtained by processing a gold and silver telluride mineral concentrate from a mine in Colombia. An acid wash, also known as acidification, was carried out, followed by oxidation with nitric acid as a form of pretreatment. Cyanidations of the pretreatment residues were carried out, and the results compared with results from cyanidations of base materials. The removal of carbonates in the acidification, a tellurium extraction close to 90 percent during pretreatment, and a 30 percent improvement in gold recovery compared to the conventional process were achieved.
Full-text paper:
Mining, Metallurgy & Exploration (2023) 40:2051–2058, https://doi.org/10.1007/s42461-023-00817-y
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