A preliminary rheological classification of phyllosilicate group minerals.

Ndlovu, Bulelwa, Forbes, Elizaveta, Farrokhpay, Saeed, Becker, Megan, Bradshaw, Dee and Deglon, David (2014) A preliminary rheological classification of phyllosilicate group minerals.. Minerals Engineering, 55 383-389. doi:10.1016/j.mineng.2013.06.004


Author Ndlovu, Bulelwa
Forbes, Elizaveta
Farrokhpay, Saeed
Becker, Megan
Bradshaw, Dee
Deglon, David
Title A preliminary rheological classification of phyllosilicate group minerals.
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.mineng.2013.06.004
Volume 55
Start page 383
End page 389
Total pages 11
Place of publication Kiddlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract With the increased exposure to progressively complex ores, there is growing concern over the effects of phyllosilicate gangue minerals. These minerals present challenges during ore beneficiation, with issuessuch as reduced flotation performance and complex tailings treatment arising. Often broadly classified as ‘clays’, the understanding of the distinct behaviour of phyllosilicates remains poor. This work focusses on talc, illite and kaolinite, and forms part of an ongoing study which aims at investigating the entire phyllosilicate group, categorised as serpentine, micas; talc/pyrophillite, kaolinites, illites, smectites and vermiculite. Using pure minerals belonging to each phyllosilicate type, a comprehensive surface charge and rheological analysis was conducted, incorporating their charge anisotropy and non-spherical morphology.The mineralogy was discussed, based on pre-existing knowledge of the minerals. Talc, kaolinite and illite suspensions are characterised by high yield stresses and low viscosities, with differences in their behaviour attributed to variations in charge anisotropy, aspect ratio and surface morphology. A comparison with other phyllosilicates showed that muscovite (mica) results in the least rheologically complex suspensions, while the fibrous nature of chrysotile (serpentine) leads to suspensions with the highest yield stresses and viscosities. The other minerals demonstrate intermediate rheological behaviour. Such a classification may be foundational to geometallurgical advances which can enable process performance predictions based on mineralogy.
Keyword Phyllosilicates
Iso-electric point
Point of zero charge
Illite
Kaolinite
Talc
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 29 July 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 23 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 16 Aug 2013, 00:49:37 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre