Study on the Maximum Bubble Loads in Frcth Flotation
Study on the Bubble Loads in Froth Flotation-1
1961 Volume 77 Issue 872 Pages 94-100
Details
1961 Volume 77 Issue 872 Pages 94-100
In froth flotation if mineral particles attached on bubble surface are arranged in monolayer packing, . the particles more than that of their arrangement becomes closest packing can not be attached to definite bubble surface. Hence it is thinkable that this specific number of mineral particles corresponds to maximum bubble. load. In order to calculate the maximum bubble load the authors theoretically introduced the equation represe nting the numbers of closely packed small spheres on large spherical surface assuming that particles and bubble. respectively having spherical form.
By using the equation variations of numbers of closely packed mineral particles and of maximum bubble, loads of galena, chalcopyrite and coal against their particle sizes were calculated. These results were elucidated by Fig. 9, 10 and 12. From these relations the following facts were ascertained that the numbers of closely packed mineral particles are increased with the decrease of particle size, while the maximum bubble: loads remarkably diminish with the decrease of particle size. This is caused by the considerable weight re duction of mineral particle due to the decrease of particle size.
The above size dependency of maximum bubble load have an important meanings to solve the flotation, of fine mineral particles. Hitherto it have been considered that the less floatabilities of fine particles are dueto the change of their surface properties, however, even though their surfaces are unchanged as shown in Fig. 9, 10 and 12 since the weight of virtually floated minerals is remarkably diminished with the decrease of particle size, it should seem that as if finer particles substantially have weak floatabilities.
Concerning the maximum bubble load of coal flotation the approximation between calculated results. and Sun and Zimmerman's experimental values was ascertained. Moreover the relation between ibuoyancy and gravity of armored bubble was discussed.
