Dewatering

Wills, B.A.

doi:10.1016/b978-0-08-097053-0.00015-7

Cited by 22 publications

(24 citation statements)

References 17 publications

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“…provided were obtained from laboratory metallurgical tests on composite samples taken from 20-meter drill hole segments. The first four variables (Cu rec, Mo rec, pH, Lime cons) were obtained from unit cell Rougher Flotation tests; the fifth (WI) was obtained from a standard Bond Work Index test which is described in Wills, 2015, chapter 5 5 .…”

Section: Methodsmentioning

confidence: 99%

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HIDSAG: Hyperspectral Image Database for Supervised Analysis in Geometallurgy

et al. 2023

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Supervised analysis using spectral data requires a well-informed characterisation of the response variables and abundant spectral data points. The presented hyperspectral dataset comes from five sets of geometallurgical samples, each characterised by different methods. To provide the spectral data, all mineral samples were scanned with SPECIM VNIR and SWIR hyperspectral cameras. For each subset the following data are provided 1) hyperspectral reflectance images in the VNIR spectral range (400–1000 nm wavelength); 2) hyperspectral reflectance images in the SWIR spectral range (900–2500 nm wavelength); 3) hyperspectral reflectance images in the VNIR-SWIR range (merged to SWIR spatial resolution); 4) RGB images constructed from hyperspectral data using a Bilateral Filter based sensor fusion method; 5) response variables representing mineral sample characterisation results, provided as training and validation data. This dataset is intended for use in general regression and classification research and experiments. All subsets were validated using machine learning models with satisfactory results.

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Section: Methodsmentioning

confidence: 99%

“…Air is injected into the cell through a vertical tube surrounding the impeller shaft, the volume of which is controlled by a valve and by the impeller rotation speed. The air stream is separated into small bubbles that rise through the slurry to the surface, collecting particles from the collection zone into the froth phase 5 .…”

Section: Methodsmentioning

confidence: 99%

HIDSAG: Hyperspectral Image Database for Supervised Analysis in Geometallurgy

et al. 2023

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“…To separate microparticles, field-flow fractionation [8], gel electrophoresis [9], and size-exclusion chromatography [10] are state-of-the-art approaches. A major drawback of these approaches is their low throughput or low selectivity for particle mixtures with similar separation properties (e.g., shape, density) below a particle size of 10 µm [11][12][13]. Dielectrophoresis (DEP), which is referred to as the movement of polarizable particles in an inhomogeneous electric field, offers an alternative tool to address a wide range of particles and at the same time is able to achieve relevant throughputs [14,15].…”

Section: Introductionmentioning

confidence: 99%

Polarizability-Dependent Sorting of Microparticles Using Continuous-Flow Dielectrophoretic Chromatography with a Frequency Modulation Method

et al. 2019

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The separation of microparticles with respect to different properties such as size and material is a research field of great interest. Dielectrophoresis, a phenomenon that is capable of addressing multiple particle properties at once, can be used to perform a chromatographic separation. However, the selectivity of current dielectrophoretic particle chromatography (DPC) techniques is limited. Here, we show a new approach for DPC based on differences in the dielectrophoretic mobilities and the crossover frequencies of polystyrene particles. Both differences are addressed by modulating the frequency of the electric field to generate positive and negative dielectrophoretic movement to achieve multiple trap-and-release cycles of the particles. A chromatographic separation of different particle sizes revealed the voltage dependency of this method. Additionally, we showed the frequency bandwidth influence on separation using one example. The DPC method developed was tested with model particles, but offers possibilities to separate a broad range of plastic and metal microparticles or cells and to overcome currently existing limitations in selectivity.

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“…A major drawback of these approaches is their low throughput or low selectivity for particle mixtures with similar separation properties (e.g. shape, density) below a particle size of 10 µm [11][12][13]. Dielectrophoresis (DEP), which is referred to as the movement of polarizable particles in an inhomogeneous electric field, offers an alternative tool to address a wide range of particles and at the same time is able to achieve relevant throughputs [14,15].…”

Section: Introductionmentioning

confidence: 99%

Polarizability-dependent Sorting of Microparticles Using Continuous-flow Dielectrophoretic Chromatography with a Frequency Modulation Method

Giesler

Pesch

Weirauch

et al. 2019

Preprint

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The separation of microparticles with respect to different properties such as size and material is a research field of great interest. Dielectrophoresis, a phenomenon which is capable of addressing multiple particle properties at once, can be used to perform a chromatographic separation. However, the selectivity of current dielectrophoretic particle chromatography (DPC) techniques is limited. Here we show a new approach for DPC based on differences in the dielectrophoretic mobilities and the crossover frequencies of polystyrene particles. Both differences are addressed by modulating the frequency of the electric field to generate positive and negative dielectrophoretic movement to achieve multiple trap and release cycles of the particles. A chromatographic separation of different particle sizes revealed a voltage dependency of this method. Additionally, we showed the frequency bandwidth influence on separation using one example. The DPC method developed was tested with model particles but offers possibilities to separate a broad range of plastic and metal microparticles or cells and to overcome currently existing limitations in selectivity.

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Dewatering

Cited by 22 publications

References 17 publications

HIDSAG: Hyperspectral Image Database for Supervised Analysis in Geometallurgy

HIDSAG: Hyperspectral Image Database for Supervised Analysis in Geometallurgy

Polarizability-Dependent Sorting of Microparticles Using Continuous-Flow Dielectrophoretic Chromatography with a Frequency Modulation Method

Polarizability-dependent Sorting of Microparticles Using Continuous-flow Dielectrophoretic Chromatography with a Frequency Modulation Method

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