The response of sulphide and gangue minerals in selected Merensky ores to increased depressant dosages

Wiese, J., Harris, P. and Bradshaw, D. (2007). The response of sulphide and gangue minerals in selected Merensky ores to increased depressant dosages. In: D. Bradshaw, Minerals Engineering: Reagents 2006 Conference. Reagents 2006 Conference, Cape Town, South Africa, (986-995). November 2006. doi:10.1016/j.mineng.2007.03.008


Author Wiese, J.
Harris, P.
Bradshaw, D.
Title of paper The response of sulphide and gangue minerals in selected Merensky ores to increased depressant dosages
Conference name Reagents 2006 Conference
Conference location Cape Town, South Africa
Conference dates November 2006
Proceedings title Minerals Engineering: Reagents 2006 Conference   Check publisher's open access policy
Journal name Minerals Engineering   Check publisher's open access policy
Place of Publication Oxford, Eng
Publisher Pergamon Press; Elsevier
Publication Year 2007
Sub-type Fully published paper
DOI 10.1016/j.mineng.2007.03.008
Open Access Status Not yet assessed
ISSN 0892-6875
Editor D. Bradshaw
Volume 20
Issue 10
Start page 986
End page 995
Total pages 10
Language eng
Abstract/Summary Depressants are added to flotation circuits to reduce naturally floatable gangue (NFG) present in ores, but under certain conditions have been shown to affect sulphide mineral recovery, particularly guar reducing the recovery of pyrrhotite. Copper sulphate is added to increase sulphide mineral recovery, but may also activate gangue particularly in the presence of dithiophosphate. This has also been shown to vary with ore type. Previous work has shown the usefulness of analysing reagents holistically, decoupling pulp and froth effects and assessing material recovered by true flotation and that recovered by entrainment separately. This work assesses the effect of copper activation on different ores and the ability of two classes of depressants, guar gum (guar) and carboxymethylcellulose (CMC) to reduce this effect and shows that by a depressant dosage of 300 g/t almost all the NFG had been removed from the concentrate. It also evaluates the effect of depressants on the sulphide minerals and shows that pyrrhotite was most affected.
Subjects 290701 Mining Engineering
290702 Mineral Processing
Keyword Sulphide ores
Flotation depressants
Flotation collectors
Flotation activators
Q-Index Code E1

Document type: Conference Paper
Sub-type: Fully published paper
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Excellence in Research Australia (ERA) - Collection
 
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Created: Wed, 13 Jan 2010, 20:07:43 EST by Rosalind Blair on behalf of Sustainable Minerals Institute