Electrochemical mechanism of p- amino phenol depressing sulfide minerals
(1.College of Resources and Environment, Guangxi University, Nanning 530004, P. R. China2.Department of Mineral Engineering, Central South University of Technology, Changsha 410083, P. R. China)
Abstract: The effect of pulp potential on activity of p amino phenol and its electrochemical mechanism on sulfide minerals have been researched. Results of test show that pulp potential can affect the depression activity of p amino phenol. The separation of sulfide minerals can be carried out by controlling dosage of p amino phenol, pulp pH and pulp potential. The mechanism of p amino phenol depressing sulfide minerals is not an electrostatic interaction but an electrochemical interaction. p amino phenol can lower the edge level of sulfide minerals, which leads the density of electron of mineral surface increased, as a result, the collector’s coatings on the mineral surface become unstable.
Key words: p-amino phenol； sulfide minerals； pulp potential； depressant