Mechanism of different particle sizes of quartz activated by metallic ion in butyl xanthate solution

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• 作者：Wen-qing Qin 覃文庆 ; Jia-jia Wu 武佳佳 ; Fen Jiao 焦芬
• 关键词：Key wordsparticle size ; quartz ; metallic ion ; activation ; butyl xanthate
• 刊名：Journal of Central South University
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：24
• 期：1
• 页码：56-61
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering, general; Metallic Materials;
• 出版者：Central South University
• ISSN：2227-5223
• 卷排序：24

文摘

To investigate effect of metallic ion activation on different particle sizes of quartz in butyl xanthate solution, six common ions (Pb2+, Cu2+, Fe3+, Fe2+, Mg2+ and Ca2+) were introduced as activators. The approaches of micro-flotation, adsorption test and zeta potential measurement were adopted to reveal the mechanism of ion activation. The results show that Pb2+, Cu2+ and Fe3+ are effective activators for the flotation of quartz in butyl xanthate solution because of their absorption on activated quartz surface. Average recoveries of fine particles (<37 μm) are greater than those of coarser particles (37−74 μm), suggesting that the former is easier to be activated and more likely to be floated and thus entrained in sulphide concentrate. From another perspective, addition of metallic ions (Pb2+, Cu2+ and Fe3+) renders zeta potentials move positively, and addition of the same metallic ions and butyl xanthate makes zeta potential drop apparently, which support a mechanism where they adsorb onto quartz surface, resulting in an expected increase in butyl xanthate collector adsorption with a concomitant increase in the flotation recoveries.