Adsorption Thermodynamics and Kinetics of Bornite Using Sodium Butyl Xanthate as Collector in Flotation

doi:10.12068/j.issn.1005-3026.2019.04.023

Abstract

Abstract: The flotation performance of bornite was investigated， and the adsorption mechanism of sodium butyl xanthate(NaBX) on the bornite surface was studied by using the adsorption measurement， infrared spectroscopic analysis， adsorption kinetics and thermodynamic calculation. The pH value ranging from 5 to 9 is favorable for highter floatability， and the adsorption conforms to the multimolecular layer adsorption of Freundlich model. When the pH value is 12， the floatability is poor， and the adsorption belongs to monolayer adsorption of Lamgmuir model. The adsorption of NaBX on the bornite surface conforms to second-order kinetic equation， and it is a spontaneous chemical adsorption process. The thermodynamic calculation shows that the adsorption reaction at pH 9 is easier than that at pH 12. Infrared spectroscopic analysis shows that the adsorption species of NaBX on the surface of bornite contain Cu(BX)₂，Fe(BX)₃ and(BX)₂ when the pH ranges from 5 to 9， while there is only Cu(BX)₂ when pH is 12.

Key words: bornite, sodium butyl xanthate(NaBX), adsorption, thermodynamics and kinetics, infrared spectra

CLC Number:

TD923

SUN Qian-yu， YIN Wan-zhong， ZHU Zhang-lei， YAO Jin. Adsorption Thermodynamics and Kinetics of Bornite Using Sodium Butyl Xanthate as Collector in Flotation[J]. Journal of Northeastern University Natural Science, 2019, 40(4): 574-579.

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