Calculation of electron structure by density function theory and electrochemical process of surface (100) of FeS₂

来源期刊：中南大学学报(英文版)2007年第5期

论文作者：黎全 覃文庆 孙伟 邱冠周

文章页码：618 - 618

Key words：pyrite; electrochemiscal process; flotation; ab-initio calculation

Abstract: The electron structure of FeS₂ surface (100) was computed by DFT (density function theory) and the process of electron transfer in sulfide flotation was simulated through ab-initio calculation. The results show that the interaction between xanthate and FeS₂ is controlled by the energy of valence band. The products and degree of the reaction depend on the density of state of valence band and concentration of positive hole in valence band. Interaction between xanthate and pyrite can be changed by modifying the election structure of the surface of pyrite. Xanthate is adsorbed on the surface of intrinsic pyrite. But the amount of xanthate adsorbed on the surface of the pyrite with sulfur vacancy is more than that on the surface of the intrinsic pyrite due to the higher electron and vacancy density. Xanthate is not adsorbed on the surface of pyrite with Fe vacancy because of its high Fermi energy.

基金信息：the Foundation of National Excellent Doctoral Dissertation of China
the National Natural Science Foundation of China