Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores

dc.contributor.advisorPetersen, Jochenen_ZA
dc.contributor.authorMusonda, Kabwe Juliannaen_ZA
dc.date.accessioned2015-08-12T04:04:22Z
dc.date.available2015-08-12T04:04:22Z
dc.date.issued2015en_ZA
dc.descriptionIncludes bibliography.en_ZA
dc.description.abstractThe exploitation of near-surface deposits has resulted in the need to adjust current conventional mineral processing technologies for the treatment of low grade oxidised PGM ores. The exposure of the ore to the atmosphere leads to the formation of an oxidation layer (consisting of base metal oxides) which inhibits the flotation process that requires a clean mineral surface to be effective. Previous studies have shown that an acid pre-treatment could lead to a 20% PGM recovery increase. Due to the corrosive nature of acid, such treatment would require additional equipment and a pre-wash. Therefore, this project investigates the use of ammonia as a pre-treatment of oxidised low grade PGM ores. Ammonia leaching has shown success in the extraction of base metals (94% and 91% Cu and Ni extraction) and is used as a wash reagent in an attempt to dissolve the oxidation layer and expose a cleaner mineral surface. Both column leaching of whole ore and batch stirred tank reactor leaching of milled ore were investigated as pre-treatment methods for varying length of process times, and the material was subsequently tested for its flotation behaviour. The total solids, base metal and PGM recoveries were monitored in order to determine the effect of the treatment.en_ZA
dc.identifier.apacitationMusonda, K. J. (2015). <i>Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/13708en_ZA
dc.identifier.chicagocitationMusonda, Kabwe Julianna. <i>"Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015. http://hdl.handle.net/11427/13708en_ZA
dc.identifier.citationMusonda, K. 2015. Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Musonda, Kabwe Julianna AB - The exploitation of near-surface deposits has resulted in the need to adjust current conventional mineral processing technologies for the treatment of low grade oxidised PGM ores. The exposure of the ore to the atmosphere leads to the formation of an oxidation layer (consisting of base metal oxides) which inhibits the flotation process that requires a clean mineral surface to be effective. Previous studies have shown that an acid pre-treatment could lead to a 20% PGM recovery increase. Due to the corrosive nature of acid, such treatment would require additional equipment and a pre-wash. Therefore, this project investigates the use of ammonia as a pre-treatment of oxidised low grade PGM ores. Ammonia leaching has shown success in the extraction of base metals (94% and 91% Cu and Ni extraction) and is used as a wash reagent in an attempt to dissolve the oxidation layer and expose a cleaner mineral surface. Both column leaching of whole ore and batch stirred tank reactor leaching of milled ore were investigated as pre-treatment methods for varying length of process times, and the material was subsequently tested for its flotation behaviour. The total solids, base metal and PGM recoveries were monitored in order to determine the effect of the treatment. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores TI - Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores UR - http://hdl.handle.net/11427/13708 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13708
dc.identifier.vancouvercitationMusonda KJ. Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13708en_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.titleAmmonia leaching as a pre-treatment for the processing of oxidised PGM oresen_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
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
thesis_ebe_2015_musonda_kj.pdf
Size:
3.52 MB
Format:
Adobe Portable Document Format
Description:
Collections