Effects and action mechanism of CO3^2- on flotation rate of calcite
Abstract：The effects of different concentrations of CO3^2- and pH values on flotation rate of cal- cite were studied through pure mineral flotation tests. The results show that the floating time for calcite was completely shortened from 2 min to 30 s at CO3^2- concentration of 1.5 mmol/L. The flotation rate increased significantly while pH value had no obvious influence on it. The action mechanism was studied using Zeta-potential measurement, solution chemistry calculation and interaction principle of particles. The results show that CO3^2- adsorbed by static was at the surface of calcite in form calcium carbonate deposition which then neutralized the surface electricity. The repulsive force between calcite particles decreased. The Van der Waals force and hydrophobic interaction played dominant roles. The particles attracted each other and agglomerated, which caused the particles to be adsorbed to the bubbles, thus increasing the flotation rate.
Keywords：calcitecarbonate ionflotation ratesolution chemistry
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 48-51 )