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Permanent link (DOI): https://doi.org/10.7939/R30933

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Separation of Pyrolusite and Hematite by Froth Flotation Open Access

Descriptions

Other title
Subject/Keyword
selective flotation
iron ore
sodium oleate
pyrolusite
hematite
flotation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Parrent, Marc Donald
Supervisor and department
Liu, Qi (Materials Engineering)
Examining committee member and department
Etsell, Thomas (Materials Engineering)
Joseph, Tim (Mining Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Materials Engineering
Date accepted
2012-08-10T14:18:00Z
Graduation date
2012-11
Degree
Master of Science
Degree level
Master's
Abstract
Due to challenges faced by the Wabush mine, the separation of pyrolusite and hematite using froth flotation was investigated. Using sodium oleate as a collector, micro-scale flotation testing identified conditions for selective separation of pyrolusite and hematite. When applied to Wabush iron ore on a bench-scale, direct flotation produced hematite concentrates meeting the target of 90% mass pull at 40% Mn rejection. Two separate bench-scale conditions achieved the target; the first at pH 11 using 200 g/t sodium oleate, and the second at pH 9 using 200 g/t sodium oleate and 250 g/t potato starch. Fourier transform infrared spectroscopy (FTIR) was used to study adsorption of oleate on pyrolusite and hematite. At pH 11 oleate was bound to hematite via a mixture of inner-sphere monodentate mononuclear (ISMM) and open-sphere surface hydration-shared (OS-HS) modes, while adsorption on pyrolusite was primarily ISMM with contributions from (OS-HS) and inner-sphere bidentate binuclear (ISBB) modes.
Language
English
DOI
doi:10.7939/R30933
Rights
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 these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before 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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