Breakup and re-formation of bubble clusters in a flotation cell

被引：7

作者：

Chen, Zhihao ^{[1
]}

Ata, Seher ^{[2
]}

Jameson, Graeme J. ^{[1
]}

机构：

[1] Univ Newcastle, Ctr Multiphase Proc, Callaghan, NSW 2308, Australia

[2] Univ New S Wales, Sch Min Engn, Sydney, NSW 2052, Australia

来源：

MINERALS ENGINEERING | 2015年 / 71卷

基金：

澳大利亚研究理事会;

关键词：

Flotation; Bubble size; Bubble clusters;

D O I：

10.1016/j.mineng.2014.11.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This study is concerned with the behavior of bubble clusters in a well-controlled turbulent flow. We used a specially designed cell where the bubble aggregates could be formed and exposed to breakage by a rotating impeller. The effects of impeller speed and the concentration of collector on cluster behavior were studied. It was found that the size of the clusters increases with the concentration of collector used. We also found that although the clusters could easily be destroyed under the action of impeller, they could reform, especially at lower impeller speeds. It was observed that the size of the bubbles arriving into the impeller region in the absence of particles before breakage was considerably higher than the size of the clusters formed at the same impeller speed. It appears that both cluster breakage and re-formation take place simultaneously, and the extent of formation and regrowth is mainly determined by the hydrophobicity of the particles and the impeller speed. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：16 / 20

页数：5