Aspects of Determining the Surface Activity of Dispersed Systems Based on Mineral Powders

摘要

Samples of mechanically activated quartz sand powder were obtained by grinding in a planetary ball mill to a different specific surface area (1200-3000 m(2)/kg). For these dispersed systems, the surface activity criterion (k(S)) was calculated as a value equal to the ratio of the free surface energy of the system to its total potential value (specific mass atomization energy). It has been found that the value of this criterion nonlinearly depends on the time parameters of the mechanical dispersion of the initial samples. It is recommended to use the k(S) parameter to assess the efficiency of the process of mechanical activation of rocks.