Eucalyptus oils as green collectors in gold flotation

In this study, the potential of Eucalyptus oils as green collectors in gold flotation was examined. Flotation tests were conducted on a sample of Boddington’s copper–gold sulfide ores. Eucalyptus oil compositions were determined by gas chromatography–mass spectrometry. Gold association of flotation products was investigated by Mineral Liberation Analyzer. It was found that Eucalyptus oils have the potential to replace potassium amyl xanthate as a collector in free gold flotation. The collecting power of Eucalyptus oils is correlated to the percentage of non-polar and weakly polar constituents, and in particular 1,8-cineole, phellendrene and pipertone. Eucalyptus oils possess strong selectivity for free gold rather than gold carriers, and therefore achieve high gold grades at the head of the flotation circuit.

Eucalyptus oils promote the flotation of free gold and therefore high gold selectivity at the head of the flotation circuit. They cannot substitute xanthate collectors in floating gold carriers.Figure optionsDownload as PowerPoint slideHighlights
► Eucalyptus oils are potential green collectors for gold flotation.
► The collecting power of Eucalyptus oils depends on non-polar constituents.
► Eucalyptus oils promote the flotation of free gold.
► Eucalyptus oils produce high gold selectivity at the head of the flotation circuit.
► Eucalyptus oils cannot substitute xanthate collectors in floating gold carriers.