The objective of this paper was to study the influence of eteramine on the zeta potential of hematite and quartz. Minerals with high purity degree, between 53 and 44 mm size distribution, and a 50% neutralization degree eteramine acetate were used. The tests were carried out on an eletroforetic cell, Zeta potential- model 1202 of Micromeritics. The pulp used had 12 % w/w solid. Initially, the zeta potential of both minerals were determined in distilled water (pH from 6 to 12). The hematite IEP occurred at pH values between 6 and 8 and the zp of quartz was negative for all pH studied. It was observed that the zeta potential of quartz became less negative in the presence of amine. At 3,54x10-4M eteramine concentration, it was observed that the zeta potential of quartz changes from a negative to a positive value at pH values between 9 and 10.
zeta potential; hematite; quartz; amine
