Temperature effect on xanthate sorption by chalcopyrite

A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

“…Chalcopyrite was classified as an n-type mineral and confirmed by other literature [32]. Although it was also reported that both dixanthogen and cuprous xanthate coexisted on the chalcopyrite surface, with amyl dixanthogen being the major product and cuprous xanthate complex forming monolayer [12,28], the spectra in this study showed that only dixanthogen was detected on the chalcopyrite surface and the observation was not affected by changing temperature and xanthate concentration. The difference can be attributed to the different sample preparation methods as applied in different studies.…”

“…However, when a ground chalcopyrite sample was used for an in-situ FTIR study, the chalcopyrite surface was inevitable oxidized with a wide band (~1000 cm −1 ) shown on spectra as mentioned by the authors [28]. In addition, in one reported study [12], impure -200 mesh ore sample (0.8% Cu) instead of pure mineral sample was used. The fine impure chalcopyrite particles were likely oxidized after grinding and further released copper ions into solution when they contacted water, which should facilitate the formation of a cuprous metal complex on the mineral surface.…”

“…Mustafa et al [12] studied the adsorption of xanthate on chalcopyrite and reported that xanthate was stable under the given adsorption conditions (2.58% decomposition per day). The amount of absorbed xanthate gradually increased with temperature increasing for all the tested pH, and the increase was attributed to the surface activation and enhanced solubility of xanthate.…”

Assessing the Combined Effect of Water Temperature and Complex Water Matrices on Xanthate Adsorption Using Multiple Linear Regression

“…Based on Equations (3)-(6) it could suggest that the increased oxygen content at lower temperatures results in a higher degree of xanthate adsorption (reaction of xanthate on the sulphide surface) due to the increase in DO in solution consumed by the cathodic reaction although the linear model and previous authors [24,25] also did not observe such phenomena. It is important to note that other parameters besides oxygen content have an effect on collector adsorption on the chalcopyrite surface.…”

“…The model showed that temperature had a positive influence on xanthate adsorption on chalcopyrite i.e., as the water temperature increased so did the extent of collector adsorption on the chalcopyrite surface. Mustafa et al [24], observed that the degree of adsorption of amyl xanthate on chalcopyrite increased with an increase in temperature from 278 to 293 K at pH 8 and 9. Strong et al [31] observed low residual xanthate concentration in solution after flotation tests at elevated temperatures, which they attributed to the enhanced dixanthogen formation at the mineral surface at elevated temperatures.…”