Abstract
In this study, density functional theory (DFT) was used to calculate the difference of adsorption between sphalerite (110) surfaces and butyl xanthate in the flotation process with and without Ge doping, and the effect of Ge doping on Cu (II) activation in the flotation process of sphalerite. The results show that there is covalent bonding between Zn-S and Cu-S bonds, the Cu-S bonds are more stable than Zn-S bonds, and Ge-S bonds cannot be bonded. The adsorption of sodium butyl xanthate (NaBX) on the surface of germanium-bearing sphalerite is weak, and the effect of Cu(II) activation on the adsorption of germanium-bearing sphalerite is less, that is, Cu is difficult to activate germanium-bearing sphalerite. Through the calculation and analysis of the adsorption model of NaBX on the (110) surface of sphalerite and germanium-bearing sphalerite in the absence and presence of Cu activation, it is proved that the existence of Ge doping will hinder the adsorption of sphalerite and NaBX, weaken the activation of Cu on sphalerite, reduce the flotability of sphalerite, and cause the loss of sphalerite and Ge elements in the froth flotation process.
Published Version
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