煤炭工程 ›› 2013, Vol. 45 ›› Issue (11): 108-110.doi: 10.11799/ce201311036

• 研究探讨 • 上一篇    下一篇

基于抑制蒙脱石水化膨胀的煤泥水处理方法

王辉锋   

  1. 中国矿业大学(北京)
  • 收稿日期:2013-07-17 修回日期:2013-02-27 出版日期:2013-11-10 发布日期:2013-11-11
  • 通讯作者: 王辉锋 E-mail:littleleft@126.com

The Coal Slurry Treatment Based on Inhibition of Montmorillonite Expansion and Hydration

  • Received:2013-07-17 Revised:2013-02-27 Online:2013-11-10 Published:2013-11-11

摘要:

蒙脱石遇水极易水化膨胀,从而形成胶体悬浮液,使煤泥难以沉降。从抑制蒙脱石水化膨胀的角度出发,以沉降性能作为检测指标,分析了不同电解质对其膨胀水化的抑制作用,得出结论,K+溶液能有效抑制蒙脱石水化膨胀,用K+溶液配制的煤泥水,其沉降性能大大改善,且所需絮凝剂加入量明显减少。本文还探讨了该方法对浮选可能造成的影响,结果显示,这种方法对浮选造成的影响极小。因此,这种煤泥水处理方法或可作为煤中含蒙脱石较多的选煤厂的一种参考。

关键词: 煤泥, 蒙脱石, 水化膨胀, 沉降

Abstract:

The coal slime is difficult sedimentation because of montmorillonite easily expansion and hydration to form colloidal suspensions. In order to suppress montmorillonite expansion and hydration, using its sedimentation experimental results, to analyze the effects of different electrolytes. The results indicate that K+ solution can inhibit expansion and hydration of montmorillonite and improve its sedimentation characteristics significantly. Moreover the amount of flocculant was reduced greatly. The effects of this method for flotation was studied, and the results showed that this effects was little. Therefore this coal slurry treatment may be used as the coal preparation plant with more montmorillonite.

Key words: coal slime, montmorillonite, expansion and hydration, sedimentation