Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique

Vadlakonda, Balraju and Mangadoddy, Narasimha (2020) Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique. Transactions of the Indian Institute of Metals, 73 (8). pp. 2129-2140. ISSN 0972-2815

Full text not available from this repository. (Request a copy)


This work mainly aims on the investigation of phase hold-up characteristics in a column flotation at different feed solid concentrations performing for an extensive range of working conditions. Phase hold-ups are measured using the electrical resistance tomography (ERT) coupled with pressure transducers technique. Experiments are conducted for two different nature mineral particles: hydrophilic (silica) and semi-hydrophobic (oxidized coal). The impact of gas superficial velocity, feed superficial velocity and pulp slurry height for a fixed sparger and frother addition on the gas and solid dispersion are studied. Gas hold-up increases with the gas flowrate and slurry feed rate, decreases with solid concentration. Further, bubble dynamics is estimated using coupled ERT with dynamic gas disengagement (DGD) approach. It is found that the solid’s presence affect the bubble swarm velocity thereby causing local gas holdup to drop. Possible mechanisms due to solid particles on gas dispersion are discussed and verified in the light of current experimental results.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Mangadody, Narasimha
Item Type: Article
Uncontrolled Keywords: Column flotation; Electrical resistance tomography (ERT); Gas dispersion; Hydrodynamics
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 07 Jul 2021 04:27
Last Modified: 14 Mar 2022 06:34
Publisher URL:
OA policy:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 8147 Statistics for this ePrint Item