Bubble-particle attachment science: Advances and dilemma in bubble-particle attachment on a macroscopic scale

被引：0
|
作者：
Xing Y. [1 ]
Gui X. [1 ]
Cao Y. [1 ,2 ]
Liu J. [1 ,2 ]
机构：
[1] Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou
[2] Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou
来源：
Meitan Xuebao/Journal of the China Coal Society | 2019年 / 44卷 / 02期
关键词：
Attachment; Bubble-particle; Flotation; Induction time;
D O I：
10.13225/j.cnki.jccs.2018.0427
中图分类号：
学科分类号：
摘要：
Bubble-particle attachment is defined as the processes of film thinning and rupture from bubble-particle encounter, three phased contact line spreading and the formation of a stable mineralized gas floc, which is the key process in flotation. However, the underlying mechanism for bubble-particle attachment is not well understood. The attachment process is mainly influenced by the physical and chemical properties of particle and bubble, and the chemical conditions of the solution. The thinning rupture behavior of the thin liquid film between bubble and particle is controlled by the synergistic effect between surface force and hydrodynamic force. The deformation of gas-liquid interface further increases the complexity of the system, making the theoretical research and experimental exploration on bubble-particle attachment challenging. Early researches on attachment have been mainly focused on attachment probability. The induction time test on a macroscopic scale is the dominant and the attachment probability can be calculated based on induction time result. A comprehensive review on the current bubble-particle attachment probability models and the existing technical bottlenecks was carried out. The existing technical bottlenecks and limitations were also analyzed. Experimental techniques such as the induction timer and high speed visualization have significantly contributed to a better understanding of bubble-particle attachment. It has been demonstrated that the induction time correlates well with flotation recovery. However, surface forces and film drainage information between bubble and particle could not be identified, leading to the fundamental adhesion mechanism could not be revealed by macroscopic induction time. It is an inevitable trend of the development of technology to measure the interaction force between bubble and particle and the thinning dynamics of the thin liquid film on a nanometer scale. It can shed new light on flotation micro-mineralization process, and also provide a theoretical support for the flotation intensification of difficult-to-float coal and refractory ore. © 2019, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：582 / 587
页数：5
相关论文
共 34 条
  • [1] Xing Y.W., Gui X.H., Pan L., Et al., Recent experimental advances for understanding bubble-particle attachment in flotation, Advances in Colloid and Interface Science, 246, pp. 105-132, (2017)
  • [2] Nguyen A.V., Schulze H.J., Colloidal Science of Flotation, (2004)
  • [3] Hewitt D., Fornasiero D., Ralston J., Bubble particle attachment efficiency, Minerals Engineering, 7, 5-6, pp. 657-665, (1994)
  • [4] Ralston J., Dukhin S.S., Mishchuk N.A., Wetting film stability and flotation kinetics, Advances in Colloid and Interface Science, 95, 2-3, pp. 145-236, (2002)
  • [5] Yoon R.H., The role of hydrodynamic and surface forces in bubble-particle interaction, International Journal of Mineral Processing, 58, 1-4, pp. 129-143, (2000)
  • [6] Sutherland K., Physical chemistry of flotation. XI. Kinetics of the flotation proces, The Journal of Physical Chemistry, 52, 2, pp. 394-425, (1948)
  • [7] Yoon R.H., Luttrell G., The effect of bubble size on fine particle flotation, Mineral Procesing and Extractive Metallurgy Review, 5, 1-4, pp. 101-122, (1989)
  • [8] Dobby G., Finch J., Particle size dependence in flotation derived from a fundamental model of the capture process, International Journal of Mineral Processing, 21, 3-4, pp. 241-260, (1987)
  • [9] Sven-Nilsson I., Effect of contact time between mineral and air bubbles on flotation, Kolloid-Z, 69, 2, pp. 230-232, (1934)
  • [10] Eigeles M., Volova M., Kinetic investigation of effect of contact time, temperature and surface condition on the adhesion of bubbles to mineral surfaces, Proceedings, (1960)
1234