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dc.contributor.authorKoss, Elizabeth
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2015-04-27 14:20:49.441en
dc.date.accessioned2015-04-27T19:24:54Z
dc.date.issued2015-04-27
dc.identifier.urihttp://hdl.handle.net/1974/13004
dc.descriptionThesis (Master, Mining Engineering) -- Queen's University, 2015-04-27 14:20:49.441en
dc.description.abstractIt is challenging to obtain a final lead concentrate from copper-lead-zinc ores due to the complex mineralogy of the ore and the similar flotation behaviour of minerals within the ore. This study was carried out to investigate a new method of separating lead, found in the form of galena, through the use of the polyamine chelating agent triethylenetetramine (TETA). Fundamental micro-flotation, X-Ray Photoelectron Spectroscopy (XPS), and leaching tests were conducted on pure galena to investigate the ability of TETA to reactivate galena previously depressed using sulphite or dichromate ions. From the micro-flotation and XPS experiments it was found that when galena was depressed using sulphite ions, the addition of TETA resulted in the reactivation of galena and an increase in recovery. However when galena was depressed using dichromate ions, the addition of TETA caused a further decrease in recovery. Leaching experiments showed that lead dichromate is not easily leached by TETA. Bench scale studies were conducted to verify whether TETA could be used to reactivate galena from complex copper-lead-zinc ores. Results for the bench scale experiments were consistent with the fundamental studies. When sulphite ions were used to depress galena, TETA was able to effectively reactivate the galena. However when dichromate was used as the depressant, the addition of TETA did not result in the reactivation and flotation of galena. These findings further suggested that the addition of TETA in the sulphite system resulted in the removal of lead sulphite from the mineral surface. It is believed that this is lead xanthate, being more stable than lead sulphite, remained on the mineral surface, resulting in an increase in hydrophobicity and a subsequent increase in recovery. In the dichromate system, TETA did not remove the lead dichromate bearing hydrophilic product, which is believed to act as a barrier for required xanthate interaction. Interestingly, action of TETA at this stage caused reactivation of other sulphides co-existing with galena. Residual xanthate, which cannot be utilized by depressed galena, promoted stage flotation of sphalerite, pyrite and copper bearing minerals. Removal of these minerals was helpful for further upgrading of galena in the tailings fraction.en_US
dc.languageenen
dc.language.isoenen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsCreative Commons - Attribution - CC BYen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectTETAen_US
dc.subjectChelating Agentsen_US
dc.subjectGalenaen_US
dc.subjectSulphide Oreen_US
dc.subjectCopper-lead-zinc oreen_US
dc.subjectFlotationen_US
dc.titleAn Investigation of Selective Galena Recovery Following Its Depressionen_US
dc.typeThesisen_US
dc.description.restricted-thesisThis thesis is to be restricted for a year and a half. This is restriction is required as a patent for the process described in this thesis is being pursued. My supervisor is going to conduct additional studies and file a patent in the next year and a half, and as such we ask that this thesis be restricted.en
dc.description.degreeMasteren
dc.contributor.supervisorKelebek, Sadanen
dc.contributor.departmentMining Engineeringen
dc.embargo.terms1825en
dc.embargo.liftdate2020-04-25


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