东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (3): 409-415.DOI: 10.12068/j.issn.1005-3026.2018.03.021

• 资源与土木工程 • 上一篇    下一篇

钙离子对脂肪酸类捕收剂浮选石英的影响机理

郭文达1, 朱一民1, 韩跃新1, 魏以和2   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 武汉工程大学 资源与土木工程学院, 湖北 武汉430073)
  • 收稿日期:2016-10-14 修回日期:2016-10-14 出版日期:2018-03-15 发布日期:2018-03-09
  • 通讯作者: 郭文达
  • 作者简介:冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.郭文达(1991-),男,湖北武汉人,东北大学博士研究生; 朱一民(1964-),女,辽宁沈阳人,东北大学教授,博士生导师; 韩跃新(1961-),男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51171041).国家自然科学基金资助项目(51274056,51474055).

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

GUO Wen-da1, ZHU Yi-min1, HAN Yue-xin1, WEI Yi-he2   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. College of Resources & Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, China.
  • Received:2016-10-14 Revised:2016-10-14 Online:2018-03-15 Published:2018-03-09
  • Contact: GUO Wen-da
  • About author:-
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摘要: 为了探究脂肪酸类捕收剂在浮选石英过程中,钙离子活化石英的作用及机理,进行了浮选试验、动电位检测、红外光谱分析.结果显示石英被浮选需要钙离子的活化,钙离子能增加石英的表面动电位,以及改性脂肪酸捕收剂DWD-3能在被钙离子活化的石英表面发生吸附,且存在化学吸附、氢键吸附;量子力学模拟显示,Ca2+,Ca(OH)+,OH-能在石英表面发生吸附,且Ca2+吸附作用最强,钙离子活化石英的过程是Ca2+优先在石英表面上的O处发生化学吸附,形成被Ca2+活化的表面,捕收剂DWD-3以单键氧O与2个双键O吸附在被活化的石英表面.

关键词: 钙离子, 活化, 脂肪酸类捕收剂, 石英, 浮选

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) and two double-bond oxygen (O) 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

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