Hidrometalurgia extractiva aplicada a copelas utilizadas en Ensayo al Fuego (FA) para la obtención de acetato de plomo y posterior aplicación en el proceso de cianuración

Abstract

Abstract: The research is part of an approach aimed at improving the management of lead waste generated by the cupellation process, for which an adequate characterization of the starting material was carried out through XRF and ICP-OES, revealing that the cupels used show 29.6% Pb. The most suitable operational parameters for leaching included the use of 25% acetic acid, with a solid-liquid ratio of 1:5, stirring at 250 rpm and a time of 4 hours, reaching a purity of approximately 85.5%, evaluated for the increase in the recovery of Au and Ag in cyanidation. The yield of the established process in the recovery of gold in sample 1 (free gold) was 77.83%; and in sample 2 (with sulfide content) 67.37% and a silver recovery of 99.82% when applying a 10% concentration of lead acetate, compared to the recovery without the use of lead acetate, of sample 1 recorded at 71.3% for Au and 43.3% for Au.