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Permanent link (DOI): https://doi.org/10.7939/R3ZH13

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The Use of Polyacrylamide as a Selective Depressant in the Separation of Chalcopyrite and Galena Open Access

Descriptions

Other title
Subject/Keyword
Separation of chalcopyrite and galena
Polyacrylamide
Polymer depressant
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wang, Lei
Supervisor and department
Liu, Qi (Chemical and Materials Engineering)
Examining committee member and department
Liu, Qi (Chemical and Materials Engineering)
Prasad, Vinay (Chemical and Materials Engineering)
Choi, Phillip (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Materials Engineering
Date accepted
2013-01-28T13:16:37Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
High molecular weight polyacrylamide (PAM) was tested as a potential selective depressant in the differential flotation separation of galena and chalcopyrite using potassium ethyl xanthate (KEX) as a collector. In single mineral flotation, PAM depressed chalcopyrite while galena was floatable. Mechanism study indicated that PAM could adsorb on galena through hydrogen bonding, and on chalcopyrite through hydrogen bonding as well as ammonium-copper complexation. KEX could only break up the galena-PAM bonding. It is the combined use of PAM and KEX that caused the selectivity. In mineral mixture flotation, galena and chalcopyrite could be separated by PAM and KEX only after EDTA treatment of the mineral mixtures. Time of flight secondary ion mass spectrometric (ToF-SIMS) measurements indicated that when galena and chalcopyrite were present together in the suspension, PAM adsorbed on both galena and chalcopyrite. However, after prior treatment of the mineral mixture by EDTA, PAM mainly adsorbed on chalcopyrite.
Language
English
DOI
doi:10.7939/R3ZH13
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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