The use of very low molecular weight polysaccharides as depressants in PGM flotation

Wiese, J. G., Harris, P. J. and Bradshaw, D.J. (2008) The use of very low molecular weight polysaccharides as depressants in PGM flotation. Minerals Engineering, 21 6: 471-482. doi:10.1016/j.mineng.2008.02.013

Author Wiese, J. G.
Harris, P. J.
Bradshaw, D.J.
Title The use of very low molecular weight polysaccharides as depressants in PGM flotation
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2008-05
Sub-type Article (original research)
DOI 10.1016/j.mineng.2008.02.013
Volume 21
Issue 6
Start page 471
End page 482
Total pages 12
Place of publication Oxford, London, U.K.
Publisher Pergamon
Language eng
Subject 290701 Mining Engineering
Abstract Polysaccharides traditionally used in PGM flotation have molecular weights (MW) varying from 150,000 to 600,000 as measured using gel permeation columns (GPC). In recent years polysaccharides at the lower end of the range (MW of 100,000–150,000) have been used effectively. This work evaluates the use of a modified starch depressant with a much lower average MW of 20,000 as a depressant and compares its performance on two Merensky ores to that of depressants currently used in industry, namely guar gum and carboxymethylcellulose (CMC). The UCT batch flotation system was used to assess the performance of the starch as a depressant of naturally floatable gangue (NFG) as well as its effect on sulphide mineral recovery at low and high dosages. Determination of the amount of polymer adsorbed was also done by assessing polymer in solution at various concentrations using the Du Bois method. PGM assays were carried out on one ore sample. Results indicated that this starch is an effective depressant of NFG.
Keyword Precious metal ores
Froth flotation
Flotation depressants
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Excellence in Research Australia (ERA) - Collection
ERA 2012 Admin Only
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 8 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 19 Jan 2010, 15:34:13 EST by Ms May Balasaize on behalf of Sustainable Minerals Institute