Effect of energy input on surface properties and dispersion of diaspore and kaolinite in flotation process

Abstract

Fluid strengthening and interfacial regulation are two important means to improve the flotation recovery of fine minerals. The fluid strengthening process often affects the surface properties of minerals and thus the dispersion of minerals. The effects of energy input on the dispersion and surface properties of kaolinite and diaspore were investigated in this work. The dispersion of minerals was examined through optical observation, turbidity measurement, and particle size analysis. The surface properties of minerals were characterized by measuring the zeta potential and the contact angle. Micro-flotation was used to test the effect of energy input on flotation performance. The findings revealed that increasing energy input resulted in improved particle dispersion, reduced hetero-coagulation, modified surface properties of minerals, and facilitated the separation of kaolinite and diaspore. This research would provide theoretical and technical support for the flotation of diasporic bauxites.