Measuring turbulence in a flotation cell using the piezoelectric sensor

Meng, Jun; Xie, Weiguo; Brennan, Matthew; Runge, Kym; Bradshaw, Dee

doi:10.1016/j.mineng.2014.06.007

Cited by 21 publications

(16 citation statements)

References 20 publications

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“…In this study, an LDTO-028 piezoelectric sensor was applied to measure the turbulence in the flotation cell as suggested by Meng and et.al [5]. As depicted in Figure 2, the piezoelectric sensor was connected to a rod and it was located in the cell using a mesh surface in order to prevent the sensor vibration and to measure the turbulence at various depths.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Cross Section of Mechanical Flotation Cells on the Height of Turbulent and Quiescent Zones

2017

International Journal of Mining Science

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Section: Methodsmentioning

confidence: 99%

The Effect of Cross Section of Mechanical Flotation Cells on the Height of Turbulent and Quiescent Zones

2017

International Journal of Mining Science

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“…The sensor consists of a piezoelectric film which when deflected backwards and forwards produces an AC current. Meng, et al [29] has developed techniques for processing this information and has shown it can be used to provide an estimation of the fluctuation in kinetic energy at the point of measurement. Measurement can be performed, reliably, in the presence of bubbles and/or high concentrations of solids.…”

Section: Methodsmentioning

confidence: 99%

“…PVS is a sensor that has been shown to be capable of measuring kinetic energy fluctuation ( ) in the flotation environment where air bubbles are present(Meng, et al [29] ). Therefore, a method is required to calculate from , which will be measured by ERT.…”

Section: Conductivity Variance Methodsmentioning

confidence: 99%

Measuring turbulence in a flotation cell using electrical resistance tomography

Meng

Xie

Runge

et al. 2015

Meas. Sci. Technol.

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Measuring turbulence in an industrial flotation environment has long been problematic due to the opaque, aggressive and abrasive three-phase environment in a flotation cell. One of the promising measurement techniques is Electrical Resistance Tomography (ERT). By measuring the conductivity distribution across a measurement area, ERT has been adopted by many researchers to monitor and investigate many processes involving multiphase flows. In the research outlined in this paper, a compact ERT probe was built and then used to measure the conductivity distribution within a 60L flotation cell operated with water and air. Two approaches were then developed to process the ERT data and estimate turbulence related parameters. One is a conductivity variance method and the other is based on the Green-Kubo relations. Both rely and use the fluctuation in the ERT measurement caused by bubbles moving through the measurement area, changing the density of the fluid. Results from both approaches were validated by comparing results produced by the ERT probe in a 60 litre flotation cell operated at different air rates and impeller speeds to that measured using an alternative turbulence measurement device. The second approach is considered superior to the first as the first requires the development of auxiliary information which would not usually be known for a new system.

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“…Although turbulence plays a key role in wide range of industries, until now it has not been possible to undertake detailed model validation and sufficient study to turbulence due to the lack of proper measurement tools (Meng et al,2014a;Meng, Xie, Runge, et al,2015a), especially for multi-phase flows such as in flotation cells.…”

Section: Figure 1: a Schematic Of A Flotation Cell With The Various Smentioning

confidence: 99%

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

Xie¹,

Meng²,

Nguyen

2016

International Journal of Mineral Processing

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Turbulence is common in daily activities, both naturally and industrially. However, it is not well understood on the microscopic level because there is a lack of suitable quantification techniques especially for multi-phase particulate systems such as flotation pulps. In this paper, the different quantification techniques which have been used to characterise turbulence in the literature have been reviewed in terms of their basic principles, system structure, the range of application and limitations. Optical techniques such as Laser Doppler Anemometry and Particle Image Velocimetry can produce accurate measurement results with high spatial and temporal resolution, but their applications are limited to transparent flows. Hot wire probes have high spatial and temporal resolution in turbulence quantification, but they are susceptible to environmental factors. Conductivity probe, Electrical Resistance Tomography (ERT) and Piezoelectric Sensor are techniques that can quantify turbulence in multiphase flows, but their spatial resolutions are limited. Particle Tracking Velocimetry can reveal particle trajectories in multiphase flows; it can also measure velocity fluctuation. Positron Emission Particle Tracking cannot be used to quantify turbulence although it can also be used to determine the Lagrangian trajectory of particles. For turbulence quantification in three phase flows, piezoelectric sensor, ERT and conductivity probe require further development.

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Measuring turbulence in a flotation cell using the piezoelectric sensor

Cited by 21 publications

References 20 publications

The Effect of Cross Section of Mechanical Flotation Cells on the Height of Turbulent and Quiescent Zones

The Effect of Cross Section of Mechanical Flotation Cells on the Height of Turbulent and Quiescent Zones

Measuring turbulence in a flotation cell using electrical resistance tomography

Experimental quantification of turbulence and its applications in the study of multiphase flotation pulps

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