东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (8): 1192-1196.DOI: 10.12068/j.issn.1005-3026.2018.08.025

• 资源与土木工程 • 上一篇    下一篇

N,N-二(3-氯-2-羟丙基)十二胺对菱镁矿浮选脱硅性能的影响

刘文宝, 刘文刚, 张乃旭, 李振   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2017-04-13 修回日期:2017-04-13 出版日期:2018-08-15 发布日期:2018-09-12
  • 通讯作者: 刘文宝
  • 作者简介:刘文宝(1988-),男,山东临沂人,东北大学博士研究生; 刘文刚(1981-),男,山东潍坊人,东北大学教授,博士生导师.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.
  • 基金资助:
    国家自然科学基金资助项目(51374051); 中央高校基本科研业务费专项资金资助项目(N160105001,N160106003);沈阳市中青年科技创新人才支持计划项目(RC170556).国家自然科学基金资助项目(51171041).

Effect of N,N-2 (3-chloride,2-hydroxypropyl) Dodecylamine on Flotation Desilicication of Magnesite Ore

LIU Wen-bao, LIU Wen-gang, ZHANG Nai-xu, LI Zhen   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2017-04-13 Revised:2017-04-13 Online:2018-08-15 Published:2018-09-12
  • Contact: LIU Wen-gang
  • About author:-
  • Supported by:
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摘要: 通过浮选实验研究了N,N-二(3-氯-2-羟丙基)十二胺(NCDA)作用下石英、菱镁矿和白云石的浮选行为.通过zeta电位测试、基团电负性判据和量子化学计算等分析研究了NCDA的性能及作用机理.浮选实验结果表明:在矿浆自然pH值条件下,加入同等用量的捕收剂,NCDA对石英的捕收能力比十二胺(DDA)强,对菱镁矿和白云石的捕收能力明显弱于DDA.zeta电位测试结果表明,NCDA与石英表面发生静电吸附和氢键作用.基团电负性、水油度和前线轨道能计算结果表明,相比DDA,NCDA具有更好的捕收性能和起泡性能,更容易与石英表面发生相互作用.

关键词: 阳离子捕收剂, 石英, 菱镁矿, 白云石, 量子化学, 动电位

Abstract: Flotation behavior of quartz, magnesite and dolomite in the presence of N,N-2 (3-chloride,2-hydroxypropyl)dodecylamine(NCDA) was investigated by flotation experiments. Properties and adsorption mechanism of NCDA were analyzed by zeta potential test, group electronegativity criteria and quantum chemistry calculation. Flotation results showed that, under the natural pH value of ore pulp, while the same dosages of collectors are added, NCDA has better ability to collect quartz than DDA, but the collecting ability of NCDA to magnesite and dolomite is obviously weaker than that of DDA. Results of zeta potential tests showed that NCDA adsorb on quartz surface by electrostatic adsorption and hydrogen-bond interaction. The calculation results of group electronegativity, hydrophile-lipophile balance and frontier molecular orbital energy indicated that NCDA has better collecting and foaming properties than DDA. Meanwhile, it is easier to interact with the quartz surface.

Key words: cationic collector, quartz, magnesite, dolomite, quantum chemistry, zeta potential

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