Abstract
Dealing with froth flotation of coal as a rate process from the kinetic point of view, the thesis is composed of study of the flotation characteristics of coal based on the kinetic consideration by Dr. Imaizumi and Dr. Inoue, which essentially relied on first order rate equation in which the rate constant k1, may not be single-valued but variant.
The effects of particle characteristics (i. e. size, specific gravity) on the rate constant k1 were investigated. The batch flotation experiments were carried out under the same condition using fifteen samples of different degrees of coalification, e. g., ten from domestic coal mines and five from foreign mines. It was ascertained that strong correlation exists between coalification rank and flotation rate, and that flotation rate constant had its maxi mum value on about 85% C (d. a. f.) in connection with Japanese samples. Considering chemical and physical characters and chemical structures of coal, the authors assumed that functional groups in coal structure have an important role in its surface wettability and that aromatic CH might be less effective on its flotation Lbehaviour than aliphatic one.
