Ahmet Deniz Bas, Liliana Gavrila
This study investigates the electrochemical dissolution behavior of roasted gold ore (RGO) in cyanide solutions, aiming to identify optimal leaching conditions and corrosion rates. Utilizing free corrosion tests and electrochemical noise measurements, it was found that pure gold exhibits more active behavior compared to RGO, with an initial increase in corrosion rate for gold that plateaus for RGO after 10 hours. Scanning reference electrode techniques indicated higher electromotive forces for pure gold. The optimal leaching parameters for RGO were identified as a sodium cyanide concentration of 0.04 M, a pH of 10-10.5, and an agitation speed of 250 rpm. Detailed analysis revealed that the cathodic Tafel slope is the primary factor influencing corrosion rates during cyanidation, contradicting traditional models that treat anodic and cathodic sites separately. Potentiodynamic scanning without prior cathodic cleaning yielded consistent results for both electrode types. Scanning electron microscopy (SEM) analysis suggested that iron-oxide products play a significant role in the passivation of the gold surface. The findings enhance the understanding of gold dissolution mechanisms in cyanide solutions and offer insights for the optimization of gold recovery processes.
@article{762ad9d3-3033-47d0-85b1-857e7f338953,
title={Electrochemical dissolution of roasted gold ore in cyanide solutions},
author={Ahmet Deniz Bas and Liliana Gavrila},
year={2015},
language={en}
}TY - JOUR TI - Electrochemical dissolution of roasted gold ore in cyanide solutions AU - Ahmet Deniz Bas AU - Liliana Gavrila PY - 2015 LA - en ER -
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle
Roger Rumbu
W. Hoffelner
Structural materials must be able to operate under demanding exposure conditions, particularly for advanced nuclear plants where challenges arise from
A. Rabieh, J.J. Eksteen, B. Albijanic
In this paper, the role of grinding media type on cyanide-based gold leaching in the presence of pyrrhotite was investigated. Pyrrhotite commonly occu
J. J. Eksteen, E. A. Oraby
The technology to selectively leach gold, silver and base metals from ores, concentrates, and wastes, using an alkaline glycine solution, has initiat