PEPT studies of heavy particle flow within a spiral concentrator

Boucher, Darryel; Deng, Z.; Leadbeater, Thomas; Langlois, Raymond; Renaud, Marilène; Waters, Kristian E.

doi:10.1016/j.mineng.2013.12.022

Cited by 25 publications

(13 citation statements)

References 28 publications

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“…Quartz tracers (Ø≈58 µm) were tracked flowing on the trough with the ADAC Forte (Boucher et al, 2014) and the modular setup. Figure 16 shows a comparison of the results from the two systems for a 100 mm horizontal slice of the spiral.…”

Section: Tracking Of a Particle In A Spiral Concentratormentioning

confidence: 99%

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Observation of iron ore beneficiation within a spiral concentrator by positron emission particle tracking of large (Ø=1440μm) and small (Ø=58μm) hematite and quartz tracers

Boucher

Deng

Leadbeater

et al. 2016

Chemical Engineering Science

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Section: Tracking Of a Particle In A Spiral Concentratormentioning

confidence: 99%

“…Recent work (Boucher et al, 2014;Waters et al, 2012) has shown the potential of using PEPT to investigate spiral concentrators. These studies were limited by the configuration and location rate of the PEPT detector used (the University of Birmingham ADAC Forte Camera).…”

Section: Introductionmentioning

confidence: 99%

Observation of iron ore beneficiation within a spiral concentrator by positron emission particle tracking of large (Ø=1440μm) and small (Ø=58μm) hematite and quartz tracers

Boucher

Deng

Leadbeater

et al. 2016

Chemical Engineering Science

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“…Diffusive dynamics constitute an important part of processes of interest in fields ranging from biotechnology [1][2][3][4][5][6][7] and cell biology [8][9][10][11][12][13] to fluid mechanics 14,15 and colloid science. 16,17 Understanding the role of diffusion in natural and engineered processes requires methods to quantify the motion of micron and submicron particles in complex media.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the diffusive dynamics of particles with time-dependent asymmetric microscopy intensity profiles

2016

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We put forth an algorithm to track isolated micron-size solid and liquid particles that produce time-dependent asymmetric intensity patterns. This method quantifies the displacement of a particle in the image plane from the peak of a spatial cross-correlation function with a reference image. The peak sharpness results in subpixel resolution. We demonstrate the utility of the method for tracking liquid droplets with changing shapes and micron-size particles producing images with exaggerated asymmetry. We compare the accuracy of diffusivity determination with particles of known size by this method to that by common tracking techniques and demonstrate that our algorithm is superior. We address several open questions on the characterization of diffusive behaviors. We show that for particles, diffusing with a root-mean-square displacement of 0.6 pixel widths in the time between two successive recorded frames, more accurate diffusivity determinations result from mean squared displacement (MSD) for lag times up to 5 time intervals and that MSDs determined from non-overlapping displacements do not yield more accurate diffusivities. We discuss the optimal length of image sequences and demonstrate that lower frame rates do not affect the accuracy of the estimated diffusivity.

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“…Richards and Palmer (1997) attribute this behavior to secondary current. Boucher et al (2014) report that coarse iron carriers may enter the spiral in the outer part of the trough and remain captive in this zone down the spiral due to the outward secondary current. The size distribution of silica carriers in the spiral feed, concentrate and reject stream bands is shown in Fig.…”

Section: Behavior As a Function Of Species Sizementioning

confidence: 99%

Radial distribution of iron oxide and silica particles in the reject flow of a spiral concentrator

Sadeghi

Bazin

Renaud³

2016

International Journal of Mineral Processing

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PEPT studies of heavy particle flow within a spiral concentrator

Cited by 25 publications

References 28 publications

Observation of iron ore beneficiation within a spiral concentrator by positron emission particle tracking of large (Ø=1440μm) and small (Ø=58μm) hematite and quartz tracers

Observation of iron ore beneficiation within a spiral concentrator by positron emission particle tracking of large (Ø=1440μm) and small (Ø=58μm) hematite and quartz tracers

Characterization of the diffusive dynamics of particles with time-dependent asymmetric microscopy intensity profiles

Radial distribution of iron oxide and silica particles in the reject flow of a spiral concentrator

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