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Permanent link (DOI): https://doi.org/10.7939/R30W63

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Froth Phase Study using a Naturally Hydrophobic Coal in a Mechanical Flotation Column Open Access

Descriptions

Other title
Subject/Keyword
entrainment
polyethylene oxide
air recovery
froth recovery
coal flotation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wang, Huiran
Supervisor and department
Xu, Zhenghe (Chemical and Materials Engineering)
Liu, Qi (Chemical and Materials Engineering)
Examining committee member and department
Szymanski, Jozef (Mining Engineering)
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2011-09-27T20:03:57Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
The correlation between froth recovery and air recovery was established in a top-feeding mechanical flotation column. It was also found that the particles were stratified in froth layer, with hydrophobic particles (organic phase) concentrated in the upper region, and hydrophilic particles (quartz) in the lower region. Subsequently, wash water and polyethylene oxide (PEO) were used to lower entrainment of the hydrophilic minerals. In the batch flotation tests of -15 µm quartz, the addition of both wash water and PEO were found to reduce the entrainment within a certain range of superficial water flow rate or PEO concentration, but it increased the entrainment beyond the range. In the batch flotation of 1:1 mixtures of the -15 µm quartz and oxidized coal, wash water improved the separation efficiency somewhat, but the combined use of wash water and PEO dramatically increase the separation efficiency from about 30% to over 70%.
Language
English
DOI
doi:10.7939/R30W63
Rights
License granted by Huiran Wang (huiran@ualberta.ca) on 2011-09-26T21:53:20Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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