Title: Flotation of copper residues with high oxidation and combination ratios

Authors: Youcai Liu; Wei Yang; Jiangang Fu; Lifeng Li

Addresses: School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. ' School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. ' School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. ' School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China

Abstract: Sulphidising flotation was employed to successfully recover copper residues with high oxidation and combination ratios and the main components of the mineral chrysocolla (CuSiO₃). Sodium sulphide (Na₂S), ammonium sulphate ((NH₄)₂SO₄) and ethylenediamine phosphate were used as the sulphidising agent, sulphidising accelerator and the activator, respectively. The proper dosage ratio of Na₂S to (NH₄)₂SO₄ was determined for optimal sulfidisation effect, and the effect of pulp pH on the sulphidising flotation was investigated. Meanwhile, the collaborated collecting action of two hydroximic acids was studied. From the close circuit test, copper concentrate with a grade of 11.82% and a recovery of 59.60% was obtained.

Keywords: sulphidising flotation; mineral processing; waste copper residues; chrysocolla; hydroximic acid; oxidation; sodium sulphide; ammonium sulphate; ethylenediamine phosphate; copper oxide; copper ores; waste copper recovery.

DOI: 10.1504/IJMME.2011.045474

International Journal of Mining and Mineral Engineering, 2011 Vol.3 No.4, pp.329 - 340

Published online: 17 Feb 2012 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article