PDF

An Electrochemical and Leach Study of the Oxidative Dissolution of Chalcopyrite in Ammoniacal Solutions

Thandazile Moyo

2016enhydrometallurgychalcopyriteammoniacalelectrochemistryleaching

Abstract

Language:

Chalcopyrite is the most abundant copper sulphide and is extremely stable, which makes it resistant to traditional hydrometallurgical treatment methods, particularly atmospheric leaching. With the decline in ore grades and rising costs associated with concentration processes, there is a compelling need to revisit more economical and environmentally friendly hydrometallurgical options, particularly heap leaching. This study evaluates various hydrometallurgical systems used for chalcopyrite treatment, including ferric sulphate, chloride, and ammonia systems. Despite the established limits of ferric sulphate under atmospheric conditions, and the recent interest in chloride systems for heap leaching, the ammonia system remains largely unexplored, with previous research stemming from over 40 years ago. This thesis introduces significant findings related to the copper(I)/copper(II) redox couple's influence on oxidative leaching and identifies the often-overlooked limiting role of cathodic reactions. Furthermore, it proposes solutions to address the challenge of surface inhibiting layers that form during heap leaching, through the investigation of complexation and precipitation of cations in ammoniacal leach systems. These insights contribute to understanding and enhancing the efficiency of chalcopyrite leaching processes.

Download

Cite This Work

@article{a527f20c-2573-46f4-b5c2-337cf8a6ca79,
  title={An Electrochemical and Leach Study of the Oxidative Dissolution of Chalcopyrite in Ammoniacal Solutions},
  author={Thandazile Moyo},
  year={2016},
  language={en}
}
TY  - JOUR
TI  - An Electrochemical and Leach Study of the Oxidative Dissolution of Chalcopyrite in Ammoniacal Solutions
AU  - Thandazile Moyo
PY  - 2016
LA  - en
ER  -

Similar Items

Treatment of manufacturing scrap TV boar

The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f

2026enPDF

Recovery of precious metals from e waste

Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c

2026enPDF

842063941 SX configuration

2026enPDF

FEASIBILITY STUDY FOR RECOVERING PRECIOUS METALS FROM E-WASTE

ROPAFADZO JAMAKANGA

Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c

2014enPDF

Study on the influence of various factors in the hydrometallurgical processing of waste printed circuit boards for copper and gold recovery

Ionela Birloaga, Ida De Michelis, Francesco Ferella, Mihai Buzatu, Francesco Vegliò

This study investigates the hydrometallurgical recovery of copper and gold from waste printed circuit boards (WPCBs) using a sequential oxidative leac

2013enPDF

Lixiviation Simultanée du Cuivre et Cobalt dans le Système CuFeS2-Fe3O4-Co2O3 régie par la boucle Fe2+- Fe3+

MBUYA ILUNGA Bienvenu, TSHIBANDA NTAKAMUTSHI Patrick, MUHUNGU TSHUYI Symphorien, KAWAMA NGOIE Francis, KASONGO KALENGA Gigi, NKULU WA NGOIE Guy

The current technological and economic constraints impose the development of efficient and eco-friendly processes for the simultaneous treatment of su

2019enPDF