Search Results - "Quast, Keith"

Preconcentration strategies in the processing of nickel laterite ores Part 1: Literature review by Quast, Keith, Connor, Jason N., Skinner, William, Robinson, David J., Addai-Mensah, Jonas

“…•Review of published literature on preconcentrating nickel laterites.•Dominant industrial process is removal of coarse, gangue-rich material.•Other physical…”
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Preconcentration strategies in the processing of nickel laterite ores part 2: Laboratory experiments by Quast, Keith, Connor, Jason N., Skinner, William, Robinson, David J., Li, Jian, Addai-Mensah, Jonas

“…•Various physical separation techniques are only applicable to small scale evaluation.•Physical separation techniques have been tested on Australian Ni…”
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A review on the characterisation and processing of oolitic iron ores by Quast, Keith

“…•Oolitic iron ores comprise a significant and unique mineral assemblage.•The nature of oolitic iron ores can predispose them to contain high levels of…”
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Literature review on the use of natural products in the flotation of iron oxide ores by Quast, Keith

“…•Selective flotation of iron oxide and silicate minerals depends on correct choice of reagents.•Fatty acids and tall oils dominate as collectors for iron…”
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Literature review on the interaction of oleate with non-sulphide minerals using zeta potential by Quast, Keith

“…•Adsorption of oleate on non-sulphide minerals usually ascribed to chemisorption.•Presence of oleate usually causes a reduction in zeta potential.•Positive…”
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Flotation of hematite using 18-carbon fatty acids by Quast, Keith

“…•Saturated 18-carbon fatty acids are not effective as flotation reagents for hematite.•Unsaturated 18-carbon fatty acids are effective collectors for hematite…”
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An investigation of the flotation minimum in the oleate flotation of hematite under alkaline conditions by Quast, Keith

“…•Many reported instances of hematite flotation minimum at alkaline pH using oleate.•These usually coincide with the use of commercial oleate samples.•Minimum…”
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The use of zeta potential to investigate the interaction of oleate on hematite by Quast, Keith

“…[Display omitted] •Zeta potential used to investigate interaction of oleate on hematite.•From literature, presence of oleate causes a reduction in zeta…”
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Direct measurement of oleate adsorption on hematite and its consequences for flotation by Quast, Keith

“…•Direct measurement of oleate on hematite removes the uncertainty of its non-mineral adsorption.•At pH 4, oleate formed a monolayer on hematite at the…”
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The use of zeta potential to investigate the pKa of saturated fatty acids by Quast, Keith

“…[Display omitted] •Wide variety of literature values for the pKa of saturated fatty acids.•Microelectrophoresis used to determine pKa for C10–C18 saturated…”
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Use of conditioning time to investigate the mechanisms of interactions of selected fatty acids on hematite. Part 1: Literature survey by Quast, Keith

“…•Conditioning parameters have a significant effect on subsequent flotation behaviour.•Chemisorption is usual mechanism of adsorption of fatty acids on…”
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Influence of matrix type on WHIMS performance in the magnetic processing of iron ores by Quast, Keith, Skinner, William

“…•Hematite mineralogical characteristics determine recovery into magnetic product.•Hematite can be recovered with appropriate gradient enhancement…”
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Use of conditioning time to investigate the mechanisms of interactions of selected fatty acids on hematite Part II laboratory investigations by Quast, Keith

“…•Conditioning parameters have a significant effect on subsequent flotation behaviour.•Chemisorption is usual mechanism of adsorption of fatty acids on…”
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Surface chemistry and oleate flotation of three South Australian micaceous hematites by Quast, Keith

“…•Paucity of surface chemistry data on micaceous hematites.•Values of isoelectric point affected by presence of inherent silica.•Zero point of charge by…”
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Effects of solution ageing on the zeta potential characteristics of a hematite ore by Quast, Keith

“…[Display omitted] •Storage containers for mineral slurries can affect their surface properties.•Ageing of a hematite ore in plastic bottles caused the iep to…”
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The use of zeta potential to investigate the p K a of saturated fatty acids by Quast, Keith

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The use of canola oil as an environmentally friendly flotation collector in sulphide mineral processing by Owusu, Clement, Quast, Keith, Addai-Mensah, Jonas

“…•Canola oil is more selective than xanthates for chalcopyrite and pyrite flotation.•Postulated mechanism involves canola oil adsorbing on surface iron oxides…”
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Preconcentration strategies in the processing of nickel laterite ores Part 5: Effect of mineralogy by Quast, Keith, Addai-Mensah, Jonas, Skinner, William

“…•Nickel laterite ores usually have low metal grades and complex mineralogy.•Preconcentration processes are required to upgrade metal values prior to…”
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A study of the feasibility of upgrading rare earth elements minerals from iron-oxide-silicate rich tailings using Knelson concentrator and Wilfley shaking table by Abaka-Wood, George Blankson, Quast, Keith, Zanin, Massimiliano, Addai-Mensah, Jonas, Skinner, William

“…A number of gravity separation techniques for rare earth elements (REE) minerals have been investigated and reported in the literature. These include the use…”
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Flotation of hematite using C6–C18 saturated fatty acids by Quast, Keith

“…The homologous series of saturated fatty acids investigated in this study generally show a steady gradation of properties with chain length. The solution p K a…”
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