Measuring turbulence in a flotation cell using electrical resistance tomography

Meng, Jun, Xie, Weiguo, Runge, Kym and Bradshaw, Dee (2015) Measuring turbulence in a flotation cell using electrical resistance tomography. Measurement Science and Technology, 26 11: . doi:10.1088/0957-0233/26/11/115305

Author Meng, Jun
Xie, Weiguo
Runge, Kym
Bradshaw, Dee
Title Measuring turbulence in a flotation cell using electrical resistance tomography
Journal name Measurement Science and Technology   Check publisher's open access policy
ISSN 0957-0233
Publication date 2015-10-14
Year available 2015
Sub-type Article (original research)
DOI 10.1088/0957-0233/26/11/115305
Open Access Status Not Open Access
Volume 26
Issue 11
Total pages 12
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Formatted abstract
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 60 l 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 on and use the fluctuation in the ERT measurement caused by bubbles moving through the measurement area changing the density of the fluid. The results from both approaches were validated by comparing the results produced by the ERT probe in a 60l 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.
Keyword Electrical resistance tomography
Turbulence measurement
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
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