PDF

Extraction of Copper from Chalcopyrite Using Alkaline Glycine–Ammonia Solutions

Zixian Deng, Elsayed Oraby

2022encopperchalcopyritealkalineleachingglycine

Abstract

Language:

Chalcopyrite is well known as being refractory to conventional leaching approaches at atmospheric pressure. The current study investigated a hybrid approach using aqueous ammonia as a pH modifier for glycine-based lixiviant systems to leach copper from chalcopyrite while maintaining surface refreshment using ceramic media at room temperature. The glycine–ammonia system exhibited significantly better copper extraction than the traditional glycine–NaOH system. A copper extraction of 91.5% was achieved after 72 h of leaching by using 0.71 M ammonia, at a Gly:Cu molar ratio of 4:1, by using a solid content of 1%, with a ceramic media: solid ratio of 3:5 and at ambient temperature. Adding ceramic beads during leaching led to a breakup of particles and a refreshment of particles’ surfaces that significantly improved the copper extraction. At a solid content of 10%, oxygen is essential for leaching; a copper extraction of 95.4% was achieved with oxygen injection, while only 33.4% copper extraction was obtained without introducing oxygen. A kinetic analysis indicates that the leaching rate is limited by combined liquid film diffusion and diffusion through the product layer. A conceptual flowsheet is proposed, where chalcopyrite concentrate can be extracted by a leaching–grinding process and copper can be recovered by a solvent extraction–electrowin.

Download

Cite This Work

@article{cec8b0f4-c239-489e-bc26-cc4dcf3f09b5,
  title={Extraction of Copper from Chalcopyrite Using Alkaline Glycine–Ammonia Solutions},
  author={Zixian Deng and Elsayed Oraby},
  year={2022},
  language={en}
}
TY  - JOUR
TI  - Extraction of Copper from Chalcopyrite Using Alkaline Glycine–Ammonia Solutions
AU  - Zixian Deng
AU  - Elsayed Oraby
PY  - 2022
LA  - en
ER  -

Similar Items

An investigation into the leaching behaviour of copper oxide minerals in aqueous alkaline glycine solutions

B.C. Tanda, J.J. Eksteen

Copper oxide minerals are normally extracted by acidic leaching followed by copper recovery with solvent extraction and electrowinning. However, coppe

2016enPDF

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

Towards industrial implementation of glycine-based leach and adsorption technologies for gold-copper ores

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

2017enPDF

Extraction of copper and the co-leaching behaviour of other metals from waste printed circuit boards using alkaline glycine solutions

Huan Li, Elsayed Oraby, Jacques Eksteen

Waste printed circuit boards (WPCBs) are a complicated and valuable fraction of electric and electronic waste. The recycling of them is critical to av

2025enPDF

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

Metals Recovery: Study of the Kinetic Aspects of Copper Acidic Leaching Waste Printed Circuit Boards from Discarded Mobile Phones

Martina Laubertová, Bora Derin

This study was performed to investigate the possibility of copper recovery from the waste printed circuit boards (WPCBs) of waste mobile phones using

2019enPDF