煤炭工程 ›› 2019, Vol. 51 ›› Issue (11): 143-147.doi: 10.11799/ce201911031

• 研究探讨 • 上一篇    下一篇

pH和金属阳离子对煤泥浮选以及动力学的影响研究

刘宜萍,赵云良,陈天星,李洪强,宋少先   

  1. 武汉理工大学资源与环境工程学院
  • 收稿日期:2018-12-04 修回日期:2019-02-16 出版日期:2019-11-20 发布日期:2020-05-11
  • 通讯作者: 赵云良 E-mail:zyl286@whut.edu.cn

Effects of pH and metal cations on the flotation and kinetics of coal slime

  • Received:2018-12-04 Revised:2019-02-16 Online:2019-11-20 Published:2020-05-11

摘要: 针对煤泥浮选困难的问题,探究了pH和金属阳离子对煤泥浮选以及动力学的影响,根据浮选结果,结合浮选动力学计算了煤的浮选速率及灰分的浮选速率。研究表明,pH 在5.5和7.2时在任一浮选时间里煤的浮选动力学曲线都高于其他pH,而灰分的浮选动力学曲线低于其它pH,煤的浮选速率与灰分的浮选速率差值增大|从浮选动力学分析加入不同金属阳离子对灰分回收率的提高效果要高于煤,并且煤的浮选速率也在增加。根据浮选动力学分析表明调节pH可以有效改善煤的浮选回收效果,而加入不同金属阳离子均会导致煤的浮选回收效果下降。

关键词: 浮选动力学, pH, 阳离子, 煤, 高岭土

Abstract: In order to solve the problem of flotation of coal slime,the influence of pH and metal cations on the coal flotation and flotation kinetics of coal slime was investigated. Results showes that the kinetics of coal flotation at pH 5.5 and 7.2 were higher than the other pH in all flotation process, whilst the ash flotation kinetics was lower than the other pH; According to the analysis of flotation kinetics,the effect of adding different metal cation on ash recovery is higher than that of coal, and the flotation rate is also increasing. In addition pH can effectively improve the coal recovery, whilst adding metal cation can leading the decreased of coal recovery.