The effect of electrolytes on the flotation of pyrite

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dc.contributor.advisorO'Connor, Cyril Ten_ZA
dc.contributor.authorBarker, Louise Madeleineen_ZA
dc.date.accessioned2016-09-25T16:49:07Z
dc.date.available2016-09-25T16:49:07Z
dc.date.issued1983en_ZA
dc.descriptionBibliography: pages 145-149.en_ZA
dc.description.abstractIn the flotation of pyrite a minimum concentration of any ions is necessary to stabilize the froth and thus produce a reasonable recovery of pyrite. In the absence of ions a "dry froth" is formed which results in a decreased mass pull and thus a low pyrite recovery. The predominant effect of an .increased concentration of univalent ions was a decrease in ·the formation of "dry froth" during flotation which resulted in an increase in pyrite recovery. This was due to the increase in froth stability with the addition of ions and was verified in the two and three phase froth stability tests. The predominant effects of the divalent ions were: (i) an increase in froth stability resulting in increased pyrite recovery (ii) a sharp increase in grade due to a decrease in gangue recovery (iii) a decreased rate of flotation. The decrease in gangue recovery was possibly due to the effect of the ion on the compression of the electrical double layer resulting in coagulation of the quartz particles. The slow rate of flotation was ascribed to the slow rate of the ascent of the heavily mineralized bubbles. This increase in bubble mineralization could be due to coagulation of pyrite in the pulp phase. The adsorption of the collector, sodium ethyl xanthate, on pyrite was not affected by the univalent or divalent cations but decreased with the addition of the nitrate anion. However these variations in xanthate adsorption did not seem to have a significant effect on the flotation of pyrite. Flotation experiments using oxidised ore showed a reduced pyrite recovery compared with the leached ore. This was ascribed to the low xanthate adsorption and the low natural floatability of the ore.en_ZA
dc.identifier.apacitationBarker, L. M. (1983). <i>The effect of electrolytes on the flotation of pyrite</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/21916en_ZA
dc.identifier.chicagocitationBarker, Louise Madeleine. <i>"The effect of electrolytes on the flotation of pyrite."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1983. http://hdl.handle.net/11427/21916en_ZA
dc.identifier.citationBarker, L. 1983. The effect of electrolytes on the flotation of pyrite. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Barker, Louise Madeleine AB - In the flotation of pyrite a minimum concentration of any ions is necessary to stabilize the froth and thus produce a reasonable recovery of pyrite. In the absence of ions a "dry froth" is formed which results in a decreased mass pull and thus a low pyrite recovery. The predominant effect of an .increased concentration of univalent ions was a decrease in ·the formation of "dry froth" during flotation which resulted in an increase in pyrite recovery. This was due to the increase in froth stability with the addition of ions and was verified in the two and three phase froth stability tests. The predominant effects of the divalent ions were: (i) an increase in froth stability resulting in increased pyrite recovery (ii) a sharp increase in grade due to a decrease in gangue recovery (iii) a decreased rate of flotation. The decrease in gangue recovery was possibly due to the effect of the ion on the compression of the electrical double layer resulting in coagulation of the quartz particles. The slow rate of flotation was ascribed to the slow rate of the ascent of the heavily mineralized bubbles. This increase in bubble mineralization could be due to coagulation of pyrite in the pulp phase. The adsorption of the collector, sodium ethyl xanthate, on pyrite was not affected by the univalent or divalent cations but decreased with the addition of the nitrate anion. However these variations in xanthate adsorption did not seem to have a significant effect on the flotation of pyrite. Flotation experiments using oxidised ore showed a reduced pyrite recovery compared with the leached ore. This was ascribed to the low xanthate adsorption and the low natural floatability of the ore. DA - 1983 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1983 T1 - The effect of electrolytes on the flotation of pyrite TI - The effect of electrolytes on the flotation of pyrite UR - http://hdl.handle.net/11427/21916 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21916
dc.identifier.vancouvercitationBarker LM. The effect of electrolytes on the flotation of pyrite. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1983 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21916en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleThe effect of electrolytes on the flotation of pyriteen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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