An investigation of the potential for eucalyptus oils as reagents in fine coal flotation

Botman, P. T., Holtham, P. N. and Wightman, E. (2010). An investigation of the potential for eucalyptus oils as reagents in fine coal flotation. In: Bruce Atkinson and Sandra Atkinson, Proceedings of the 13th Australian Coal Preparation Conference: Advancing coal preparation technologiesfor our future. 13th Australian Coal Preparation Conference, Mackay, Qld., Australia, (374-387). 12-17 September 2010.

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Author Botman, P. T.
Holtham, P. N.
Wightman, E.
Title of paper An investigation of the potential for eucalyptus oils as reagents in fine coal flotation
Conference name 13th Australian Coal Preparation Conference
Conference location Mackay, Qld., Australia
Conference dates 12-17 September 2010
Proceedings title Proceedings of the 13th Australian Coal Preparation Conference: Advancing coal preparation technologiesfor our future
Place of Publication Sydney, N.S.W., Australia
Publisher Australian Coal Preparation Society
Publication Year 2010
Sub-type Fully published paper
ISBN 9780958934404
Editor Bruce Atkinson
Sandra Atkinson
Start page 374
End page 387
Total pages 14
Collection year 2011
Language eng
Abstract/Summary Natural oils such as pine oil and eucalyptus oil were used in metalliferrous flotation, principally as frothers, in the early days of flotation In recent years synthetic collectors and frothers have taken over, largely because the complex chemistry and wide variation in natural oils results in poor control of their consistency as flotation reagents. Australia, however, has enormous potential as a supplier of eucalyptus oils. If one or more eucalypt species were identified as desirable sources of coal flotation reagents, it would be logical to cultivate them in industrial plantations on mine sites and to have this form of land use accepted as a satisfactory end point for rehabilitation. Such an outcome would have multiple benefits for the mining industry. Essential oils derived from eucalypts are composed predominantly of terpenes, compounds which contain a sequence of two or more isoprene units (C5H8). Gas Chromatography (GC) tests, coupled with Mass Spectrometry (MS)and Flame Ionisation Detection (FID) were carried out on oils from ten different eucalypt species in order to identify those oils, or their constituents, that might have useful properties for the flotation of coal. The action of eucalyptus oils as flotation reagents in terms of surface property parameters of a two-phase system were investigated. Bubble size and foamability measurements were done to evaluate foamability indices and the critical coalescence concentrations in order to characterise the oils' applicability as frothers (relative to MIBC). Flotation tests wee carried out in a laboratory cell to evaluate the flotation response for a Bowen Basin coal using the most prospective oils. The flotation yield and ash curves are presented and compared statistically.
Formatted Abstract/Summary
Natural oils such as pine oil and eucalyptus oil were used in metalliferrous flotation, principally as frothers, in the early days of flotation In recent years synthetic collectors and frothers have taken over, largely because the complex chemistry and wide variation in natural oils results in poor control of their consistency as flotation reagents. Australia, however, has enormous potential as a supplier of eucalyptus oils. If one or more eucalypt species were identified as desirable sources of coal flotation reagents, it would be logical to cultivate them in industrial plantations on mine sites and to have this form of land use accepted as a satisfactory end point for rehabilitation. Such an outcome would have multiple benefits for the mining industry.

Essential oils derived from eucalypts are composed predominantly of terpenes, compounds which contain a sequence of two or more isoprene units (C5H8). Gas Chromatography (GC) tests, coupled with Mass Spectrometry (MS)and Flame Ionisation Detection (FID) were carried out on oils from ten different eucalypt species in order to identify those oils, or their constituents, that might have useful properties for the flotation of coal.

The action of eucalyptus oils as flotation reagents in terms of surface property parameters of a two-phase system were investigated. Bubble size and foamability measurements were done to evaluate foamability indices and the critical coalescence concentrations in order to characterise the oils' applicability as frothers (relative to MIBC). Flotation tests wee carried out in a laboratory cell to evaluate the flotation response for a Bowen Basin coal using the most prospective oils. The flotation yield and ash curves are presented and compared statistically.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 09 Dec 2010, 09:36:46 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre