东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (3): 404-408.DOI: 10.12068/j.issn.1005-3026.2018.03.020

• 资源与土木工程 • 上一篇    下一篇

蛇纹石表面特性研究

李治杭, 韩跃新, 李艳军, 高鹏   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2016-10-11 修回日期:2016-10-11 出版日期:2018-03-15 发布日期:2018-03-09
  • 通讯作者: 李治杭
  • 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.李治杭(1990-),男,陕西安康人,东北大学博士研究生; 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(51204033).

Surface Property of Serpentine

LI Zhi-hang, HAN Yue-xin, LI Yan-jun, GAO Peng   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2016-10-11 Revised:2016-10-11 Online:2018-03-15 Published:2018-03-09
  • Contact: HAN Yue-xin
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摘要: 通过溶解试验、扫描电镜、Zeta电位测试及XPS多种手段,对蛇纹石表面特性进行了分析.试验结果表明,在水溶液中,蛇纹石表面易发生溶解,使矿浆pH值呈碱性,并表现出较强的缓冲能力.溶解后蛇纹石的表面形貌发生很大变化,出现较多凸起状、絮状结构,并且其表面元素含量也较溶解前有较大差异.此外,从蛇纹石晶体结构上对其机理进行了讨论.结果表明,经磨碎后蛇纹石表面易暴露出大量Mg2+,—OH,并进入溶液中使得溶液中Mg含量及pH值显著升高.同时,细粒级蛇纹石表面暴露的—OH越多,使得矿浆pH值变化越快,pH值也越高.

关键词: 蛇纹石, 表面特性, 溶解, 晶体结构, 浮选

Abstract: Dissolution experiments, SEM, Zeta potential tests and XPS are used to analyse the surface property of serpentine. The results showed that the surface of serpentine is prone to dissolve in aqueous solution and make pulp pH alkaline, which reveals strong buffer ability. Compared with undissolved serpentine, embossment and flocculent structure are observed on the surface topography of dissolved serpentine. Besides, the surface elements content also has a big diffrence. The crystal structure of serpentine was discussed to understand the dissolution mechanism. The result indicated that large amounts of Mg2+ and —OH expose on serpentine surface after grinding and transfer to aqueous solution which leading to a high pH value and high content of Mg2+ of pulp. Furthermore, because of more —OH exposed on fine-grained serpentine surface, the rise of pH value is more remarkable and higher pH value is obtained.

Key words: serpentine, surface property, dissolution, crystal structure, flotation

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