Effects and Activation Mechanism of Calcium Ion on the Flotation of Quartz with Fatty Acid Collector

doi:10.12068/j.issn.1005-3026.2018.03.021

Abstract

Abstract: To investigate the effects and activation mechanism of calcium ion on quartz in the flotation process with fatty acid collector， flotation tests， Zeta potential measurements and infrared spectroscopy analysis were applied. The results showed that flotation of quartz requires the activation of calcium ions， and calcium ions can increase the surface zeta potential of the quartz and the modified fatty acid collector DWD-3 can be adsorbed on the surface of the activated quartz through chemical and hydrogen bonding adsorption. The results of quantum mechanics simulation indicated that Ca²⁺， Ca(OH)⁺ and OH^-ions can all adsorbe on the quartz surface， and Ca²⁺ ion adsorption is the strongest. The process of Ca²⁺ion activation is that Ca²⁺ preferentially adsorbs on the O position of the quartz surface by chemical adsorption， forming a surface activated by Ca²⁺， then a single-bond oxygen (O_Ⅰ) and two double-bond oxygen (O_Ⅱ) of the collector DWD-3 adsorbe on the activated quartz surface by chemical and hydrogen bond adsorption.

Key words: calcium ion, activation, fatty acid collector, quartz, flotation

CLC Number:

TD923

GUO Wen-da， ZHU Yi-min， HAN Yue-xin， WEI Yi-he. Effects and Activation Mechanism of Calcium Ion on the Flotation of Quartz with Fatty Acid Collector[J]. Journal of Northeastern University Natural Science, 2018, 39(3): 409-415.

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