Moosavi-Khoonsari, Elmira et Tripathi, Nagendra.
2024.
« Copper anode slime processing with a focus on gold recovery: A review of traditional and recent technologies ».
Processes, vol. 12, nº 12.
Prévisualisation |
PDF
Moosavi-Khoonsari-E-2024-30363.pdf - Version publiée Licence d'utilisation : Creative Commons CC BY. Télécharger (7MB) | Prévisualisation |
Résumé
Copper anode slime (CAS) contains high concentrations of precious metals, particularly gold, which can reach up to 11 wt%. During copper anode electrorefining, 5–10 kg of CAS is generated per ton of copper cathode. Processing CAS is crucial for economic reasons, as gold significantly contributes to revenue for both miners and custom copper smelters. This paper provides a comprehensive review of industrial processes and technologies for CAS treatment, with a focus on gold recovery, covering studies from the early 1930s to the present. It documents traditional and recent trends and analyzes the advantages and disadvantages of existing methods. Key factors affecting revenue, such as gold production lead time, in-process inventory, and first-pass recovery rate, are discussed to mitigate losses in fluctuating gold markets. CAS processing routes are categorized into two main groups: traditional hybrid routes (involving hydrometallurgy, pyrometallurgy, and electrorefining/electrowinning) and rather recent purely hydrometallurgical routes. Traditional methods can take up to 45 days, with gold recovery occurring late in the process and losses arising in the anode, cathode, electrolyte, or slag. In contrast, purely hydrometallurgical routes have total processing times of 7–8 days, achieve early gold recovery, and can attain first-pass recovery rates as high as 99%. Additionally, the hydrometallurgical routes are more environmentally friendly, with lower pollution levels and reduced energy consumption compared to hybrid routes. These findings indicate that purely hydrometallurgical routes outperform traditional hybrid methods. This paper aims to serve as a guideline for industrial CAS processing, assisting custom copper smelters in navigating challenging market conditions marked by low treatment and refining charges, with an emphasis on enhancing gold recovery to promote sustainability.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Moosavi-Khoonsari, Elmira |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 03 janv. 2025 21:16 |
| Dernière modification: | 29 janv. 2025 19:50 |
| URI: | https://espace2.etsmtl.ca/id/eprint/30363 |
Actions (Authentification requise)
 |
Dernière vérification avant le dépôt |