An evaluation of a direct method of bubble size distribution measurement in a laboratory batch flotation cell

Hydrodynamics and scale up in Rushton turbine flotation cells: Part 1 — Cell hydrodynamics

“…The presence of small amounts of surface active agents can lead to significant reductions in mean bubble size (Aston et al, 1983;Tucker et al, 1994;Sweet et al, 1997;Aldrich and Feng, 2000;Cho and Laskowski, 2002). This reduction occurs at concentrations at which there is very little change in static surface tension, and is attributed to the ability of the frother to prevent bubble coalescence (Cho and Laskowski, 2002).…”

“…The bubble diameter was measured using a University of Cape Town (UCT) bubble size analyzer (Tucker et al, 1994). Because of size constraints associated with the use of an overhead stirrer, it was only possible to perform measurements close to the wall of the 2.25 dm 3 cell.…”

Flotation in a novel oscillatory baffled column

“…The method of using this type of bubble size measurement is well documented (Randall et. al., 1989;Tucker et. al., 1994).…”

The Online Determination of Bubble Surface Area Flux Using the CiDRA GH-100 Sonar Gas Holdup Meter

“…As the bubbles migrate through the capillary tube they pass through an optical detector that measures the length of the bubble, and the bubble size is calculated from the volume (Tucker et al, 1994). Practical limitations to online applications include the size of the capillary tube, which is thought to produce a bias towards smaller bubble diameters (Hernandez-Aguilar et al, 2004), and the procedures required to normalize the bubble volume for film thickness on the walls of the capillary, which changes with the chemistry of the water (Tucker et al, 1994).…”