Susceptibility to cyanidation of pyrrhotite-associated gold in pyrite calcines from (non)oxidizing roasting environments

Faïçal Larachi,David Bampolé Lukumu,Ahmet Deniz Baş

Minerals Engineering（2023）

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摘要

•Study focused on leaching pyrrhotite-associated gold in roasted pyrite calcines.•Air roasting promoted multiple (single) pyrrhotites (unlike He, CO2, steam).•Bilayer leach cell controlled electrochemical gold to raw/roasted pyrite contacts.•Pyrrhotite/iron oxide topology influenced by roasting type.•CO2/H2O roast moderately increases Au recovery regardless of roasted pyrite contact.

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关键词

Gold dissolution, Pyrite roasting, Pyrrhotite, Galvanic interactions, Passivation, Bilayer leach cell, Roasting thermodynamics

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