Abstract
A novel method to limit the adverse effect of fine serpentine on the flotation of pyrite was investigated in this paper. The flotation results showed that coarser serpentine possessed a weaker depression effect on the pyrite flotation process, and the use of KAl(SO4)2·12H2O could efficiently limit the detrimental effect of fine serpentine on pyrite with a maximum increase of pyrite recovery from 14% to 86% at pH 9.0. The results of particle size measurements and rheological measurements exhibited that the addition of KAl(SO4)2·12H2O increased the particle size of serpentine buta hrdly affected the particle size of pyrite, then limited the formation of serpentine-pyrite aggregates. Adsorption test results showed that the adsorption density of potassium butyl xanthate (PBX) onto pyrite regained with the addition of KAl(SO4)2·12H2O, thereby achieving good flotation improvement. It can be concluded that KAl(SO4)2·12H2O is likely to be an effective pyrite flotation reagent, especially in the presence of fine serpentine.
Highlights
IntroductionIn order to eliminate the adverse influence of serpentine on sulfide minerals flotation, chemical additives such as sodium silicate, sodium hexametaphosphate, carboxymethyl cellulose (CMC), and N-carboxymethyl chitosan have been used to prevent the formation of “slime coatings” on valuable mineral surfaces by changing the surface potential of serpentine [7,8,9,10]
The results show that the adsorption density of potassium butyl xanthate (PBX) onto pyrite surface increased with withincrease the increase of PBX
The results show that the adsorption density of PBX onto pyrite surface increased with the increase of PBX
Summary
In order to eliminate the adverse influence of serpentine on sulfide minerals flotation, chemical additives such as sodium silicate, sodium hexametaphosphate, carboxymethyl cellulose (CMC), and N-carboxymethyl chitosan have been used to prevent the formation of “slime coatings” on valuable mineral surfaces by changing the surface potential of serpentine [7,8,9,10]. Physical methods such as ultrasonic treatment and high-intensity conditioning have been usually employed to remove the slime coatings from valuable mineral surfaces [11,12,13]. It appears that ultrasonic treatment and high-intensity conditioning are not efficiently economical methods
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