Search Results - "McFadzean, B."

The effect of the alkyl chain length and ligand type of thiol collectors on the heat of adsorption and floatability of sulphide minerals by Taguta, J., O'Connor, C.T., McFadzean, B.

“…•Studied adsorption of thiol collectors onto sulphide minerals using calorimetry.•Heat of adsorption and microflotation recoveries increased with alkyl chain…”
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Adsorption of copper sulphate on PGM-bearing ores and its influence on froth stability and flotation kinetics by Nyabeze, W., McFadzean, B.

“…•Copper sulphate addition resulted in a decrease in froth stability.•Froth stability of different ores affected differently by copper sulphate addition.•Copper…”
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Flotation frother mixtures: Decoupling the sub-processes of froth stability, froth recovery and entrainment by McFadzean, B., Marozva, T., Wiese, J.

“…•Flotation sub-processes were decoupled to examine synergistic frother behaviour.•Froth stability: Synergistic increase when using frother blends.•Froth…”
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The relationship between enthalpy of immersion and flotation response by Taguta, J., O’Connor, C.T., McFadzean, B.

“…[Display omitted] The enthalpy of immersion is the heat change arising from the replacement of the solid-gas interface with the solid-liquid interface when a…”
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The synergistic interaction between dithiophosphate collectors and frothers at the air-water and sulphide mineral interface by Pienaar, D., Jordaan, T., McFadzean, B., O'Connor, C.T.

“…•DTP in the presence of frother synergistically improves pulp-zone recovery.•DTP exhibits low adsorption on the mineral, and weak activity at the bubble…”
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Investigating the interaction of thiol collectors and collector mixtures with sulphide minerals using thermochemistry and microflotation by Taguta, J., O'Connor, C.T., McFadzean, B.

“…•Adsorption of thiol collector mixtures studied using calorimetry and microflotation.•Synergistically enhanced enthalpies of interaction produced by collector…”
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Decoupling the effects of alteration on the mineralogy and flotation performance of Great Dyke PGE ores by Dzingai, T., McFadzean, B., Tadie, M., Becker, M.

“…Ores from a single deposit may exhibit extensive variability in their mineralogy and texture. The ability to quantify this variability and link it to mineral…”
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Comparison of collector performance for a South African and a Brazilian iron ore considering mineralogical characteristics by Mhonde, N.P., Wiese, J.G., McFadzean, B.

“…•Evaluation of different grind sizes in the flotation of the South African BIF ore.•Column flotation was conducted in a hybrid cell with wash water to reduce…”
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The effect of mixed thiol collectors on the flotation of galena by McFadzean, B., Castelyn, D.G., O’Connor, C.T.

“…[Display omitted] ► Collector mixtures significantly improved the rate and recovery of galena flotation. ► An ethyl xanthate, ethyl dithiocarbamate mixture…”
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A thermochemical study of thiol collector surface reactions on galena by McFadzean, B., O’Connor, C.T.

“…•Ethyl xanthate reaction with galena followed in real time under flotation condition.•Two sequential reactions were observed and reaction mechanisms were put…”
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A thermochemical study of thiol collector surface reactions on galena and chalcopyrite by McFadzean, B., Moller, K.P., O’Connor, C.T.

“…•Surface reactions of thiol collectors with galena and chalcopyrite were studied.•Heat evolved in real time was tracked.•Reaction mechanisms were different for…”
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The effect of thiol collector mixtures on the flotation of pyrite and galena by McFadzean, B., Mhlanga, S.S., O’Connor, C.T.

“…•Benefits of collector mixtures were found to be mineral-specific.•A mixture of a weak and a strong collector improved mineral recovery.•The designation of…”
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The interactive effects of chemical and process parameters on the flotation performance of a UG2 ore by McFadzean, B., Pani, S., Wiese, J., O’Connor, C.T.

“…•The interactive effects of four process parameters were investigated using a UG2 ore.•Performance of a parameter is dependent on the levels of other…”
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The effect of pulp bubble size on the dynamic froth stability measurement by Geldenhuys, S., McFadzean, B.

“…•Dynamic and static froth stability measurements have found widespread application.•Little to no focus on how scale parameters, such as pulp bubble size,…”
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Molecular interactions between thiolate collectors and non-ionic frothers in mixed monolayers at the air–water interface using a regular solution theory approach by Pienaar, D., McFadzean, B., O'Connor, C.

“…[Display omitted] •Regular solution approach shows interactions between flotation reagents.•Interactions at the air–water interface shown between…”
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Investigating the floatability of sperrylite and its interactions with selected standard and novel collectors by Pikinini, S., McFadzean, B., O’Connor, CT, Zhang, X.

“…•The floatability of sperrylite has been determined with different collectors.•Study showed very poor interaction with collectors under alkaline…”
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A review of the use of microcalorimetry to determine the enthalpies of immersion and adsorption on various minerals and their relationship to flotation performance by O'Connor, C.T., Taguta, J., McFadzean, B.

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An investigation into the use of xanthate, trithiocarbonate and thiourea collectors on the flotation of sperrylite (PtAs2) by Wali, A., O'Connor, C.T., McFadzean, B.

“…[Display omitted] •At monolayer coverage, collectors do not sufficiently increase sperrylite recovery.•Increasing ionic strength or collector dosage improves…”
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Investigating the reasons for the improvement in flotation grade and recovery of an altered PGE ore when using sodium silicate by Molifie, A., Becker, M., Geldenhuys, S., McFadzean, B.

“…[Display omitted] •Utilising the dispersant effect of sodium silicate to improve recoveries.•Depressing gangue minerals using sodium silicate to improve…”
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Decoupling heats of immersion and dissolution of mineral powders in solution to assess wettability by Magudu, A., O’Connor, C.T., Geldenhuys, S., McFadzean, B.

“…Wettability is an important property of powders in many applications such as inks and paints, the food and pharmaceutical industries, as well as flotation…”
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