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Open AccessArticle

Effect of a Small Amount of Iron Impurity in Sphalerite on Xanthate Adsorption and Flotation Behavior

1
Beijing General Research Institute of Mining and Metallurgy, Beijing 100160, China
2
State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 100160, China
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(11), 687; https://doi.org/10.3390/min9110687
Received: 9 October 2019 / Revised: 31 October 2019 / Accepted: 4 November 2019 / Published: 6 November 2019
(This article belongs to the Special Issue Hydrometallurgical Processing of Base Metal Sulphides)
Through industrial testing at the Huize lead-zinc mine, it was found that the floatability of sphalerite varied greatly with the iron impurity content. Three kinds of Huize sphalerites with iron contents of 2.30 wt.%, 3.20 wt.% and 4.66 wt.%, were used to study the influence of small amounts of iron impurity in the sphalerite on xanthate adsorption and flotation behavior. The flotation experiments showed that the flotation recovery increased with the increase in iron impurity content. Fourier Transform infrared spectroscopy (FTIR) and Ultraviolet–visible (UV-VIS) spectra showed that the adsorbed products of xanthate on the surface of three kinds of sphalerite were metal xanthate. The adsorption capacity measurements showed that the saturation absorption of xanthate on sphalerite increased with the increase in iron impurity content. The cyclic voltammetry curve and Tafel curve showed that with the increase in iron impurity content, sphalerite was more easily oxidized and the adsorption rate of xanthate on the surface of sphalerite increased obviously. To summarize, a small amount of iron impurity was beneficial to the recovery of sphalerite.
Keywords: iron sphalerite; flotation; xanthate adsorption; cyclic voltammetry; Tafel curve iron sphalerite; flotation; xanthate adsorption; cyclic voltammetry; Tafel curve
MDPI and ACS Style

Yu, J.; Wu, X.; Zhao, Z.; Zhu, Y.; Luo, S. Effect of a Small Amount of Iron Impurity in Sphalerite on Xanthate Adsorption and Flotation Behavior. Minerals 2019, 9, 687.

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