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- Hosseini, S. H., et al.
(author)
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Adsorption studies of smithsonite flotation using dodecylamine and oleic acid
- 2006
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In: Minerals & metallurgical processing. - 0747-9182. ; 23:2, s. 87-96
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Journal article (peer-reviewed)abstract
- The interaction of various concentrations of sodium sulfide, dodecylamine (DDA) and oleicacid (OA) on smithsonite were investigated at different pH levels using zeta potential, contact angle, microflotation and diffilse-reflectance FT-IR studies. Flotation results show that the recovery and contact angle are enhanced to 94% and 115 degrees, respectively, with a dodecylamine concentration of 1.6 x 10(-3) M and a pH of 11.5. The optimum sodium sulfide consumption was found to be 2.6 x 10(-2) M. Zeta potential measurements showed less negative charge after DDA treatment on the surface of pure crystalline smithsonite. The recovery and contact angle for oleic acid flotation rises to 93% and 105 degrees respectively, with an oleic acid concentration of 1.1 x 10(-3) M and a pH of 10. The zeta potential in the case of using oleic acid showed a more negative charge after oleic acid treatment on the smithsonite surface. The FT-IR spectra studies of smithsonite conditioned with DDA confirmed the adsorption of DDA on the smithsonite surface. The spectra show that the mineral surface is changed partially to a ZnS layer after sodium sulfide treatment. The spectra confirmed the formation of zinc oleate on the smithsonite surface after oleic acid treatment. A comparison of the results using cationic and anionic collectors showed that the different adsorption densities of the reagents in two cases conferred different degrees of hydrophobicity on the smithsonite surface.
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