Influence Mechanism of Ions in Industry Backwater of Concentrator on Floatability of Pyrite

被引：0
|
作者：
Fu P. [1 ,2 ]
Li J. [1 ]
Li B. [1 ]
Wang J. [1 ,2 ]
Zhao J. [2 ]
Hu Q. [1 ]
机构：
[1] Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou
[2] Mining Research Institute, Inner Mongolia University of Science and Technology, Baotou
来源：
Li, Jie (yjslijie@126.com) | 1600年 / Editorial Office of Chinese Journal of Rare Metals卷 / 41期
关键词：
Adsorption quantity; Backwater; Infrared spectra; Pyrite; Surface potential;
D O I：
10.13373/j.cnki.cjrm.XY16012901
中图分类号：
学科分类号：
摘要：
The action mechanism of over proof ions (NH4+, Mg2+, Ca2+, F-) in industry backwater to flotation of pyrite was investigated by pure mineral flotation tests, ultraviolet visual (UV-Vis) spectrophotometer, Zeta potential and Fourier transform infrared spectroscopy (FT-IR) spectra measurements. The results showed that NH4+ in backwater made the potential of mineral surface increase and extended the range of pH values of pyrite flotation. FT-IR spectra results showed that NH4+ also made xanthate chemisorb on pyrite surface, and adsorption quantity increased with NH4+concentration increasing. The flotation recovery rate increased by 15.5% after activation of NH4+. While Mg2+, Ca2+ and F- in backwater inhibited the adsorption of xanthate on pyrite surface, the flotation recovery rate decreased by 10% on average. Mg2+ and Ca2+ easily formed hydrophilic membranes on pyrite surface to hinder xanthate adsorption; F- adsorption on mineral surface could make mineral surface be negatively charged, which was found by Zeta potential test, and thus formed a competitive adsorption between xanthate ion and F-, both being anions, and reduced xanthate adsorption on pyrite surface, so floatability of pyrite decreased. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：792 / 798
页数：6
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