This investigation is concerned with Forth Flotation dynamics, which is studied on the effect of equivalent mean bubble size on the flotability in single bubble forth flotation.
In order to do this, the experimental work was carried out with the typical mineral, i. e., ground glass powder （-150∼+170 mesh）, in a modified flotation cell supported by dry air supply, and some hydrodynamic results were then obtained thereafter. Besides, theoretical dynamic equations were derived using the direct encounter hypothesis which was based on the collision between air bubbles and mineral particles and gas-liquid adhesion with a forthing agent such as pine oil.
Accordingly, single bubble froth flotation was predominantly effected by bubble rising or bouyant force rather than surface force in the hydrodynamic point of view. In addition to this, the functional relations between equivalent mean bubble radius and the hydrodynamic factors such as Reynolds number, Weber number, Eötvös number, and drag coefficient were also discussed.