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Hydrodynamics of froth flotation and its effects on fine and ultrafine mineral particle flotation: A literature review
Minerals Engineering ( IF 4.8 ) Pub Date : 2021-09-27 , DOI: 10.1016/j.mineng.2021.107220
Daowei Wang 1 , Qi Liu 1
Affiliation  

Variables of hydrodynamics are equally important as those of surface chemistry in determining the efficiency of froth flotation processes. In a mechanical flotation cell, macro hydrodynamics is responsible for solids suspension and aggregates transport, and micro-turbulence plays an important role in the sub-processes of flotation, such as gas dispersion into small bubbles and bubble-particle collision. Generating optimal hydrodynamic regimes will benefit these sub-processes. Despite the growing research attention, flotation hydrodynamics remains a poorly understood field, especially with respect to its effects on fine and ultrafine minerals flotation. In this work, we have reviewed factors influencing flotation hydrodynamics and the characterization of flotation hydrodynamics at different scales. In particular, the effects of hydrodynamics on fine and ultrafine particle flotation processes, including bubble-particle interaction, gas dispersion, flotation kinetics, fine bubble generation, mineral particle size enlargement, and mechanical entrainment have been discussed. Recent thoughts expressed in the literature are introduced, together with recent advances of improving fines flotation by hydrodynamics optimization in cell design using the reactor-separator concept. This review may improve the overall understanding of flotation hydrodynamics and provide guidance for solving the problems in fine and ultrafine minerals flotation from the hydrodynamics perspectives. Research gaps are identified and opportunities for future work are suggested.



中文翻译:

泡沫浮选的流体动力学及其对细、超细矿物颗粒浮选的影响:文献综述

在确定泡沫浮选过程的效率时,流体动力学变量与表面化学变量同样重要。在机械浮选槽中,宏观流体动力学负责固体悬浮和聚集体的运输,而微湍流在浮选的子过程中起着重要作用,例如气体分散成小气泡和气泡-颗粒碰撞。产生最佳的流体动力学状态将有利于这些子过程。尽管越来越多的研究关注,浮选流体动力学仍然是一个知之甚少的领域,特别是在其对细粒和超细矿物浮选的影响方面。在这项工作中,我们回顾了影响浮选流体动力学的因素以及不同尺度下浮选流体动力学的表征。特别是,讨论了流体动力学对细颗粒和超细颗粒浮选过程的影响,包括气泡-颗粒相互作用、气体分散、浮选动力学、细气泡生成、矿物粒度增大和机械夹带。介绍了文献中表达的最新想法,以及通过使用反应器-分离器概念的池设计中的流体动力学优化来改进细粒浮选的最新进展。该综述可提高对浮选流体动力学的整体认识,并为从流体动力学的角度解决细粒和超细矿物浮选问题提供指导。确定研究差距并建议未来工作的机会。已经讨论了浮选动力学、细泡生成、矿物粒度增大和机械夹带。介绍了文献中表达的最新想法,以及通过使用反应器-分离器概念的池设计中的流体动力学优化来改进细粒浮选的最新进展。该综述可提高对浮选流体动力学的整体认识,并为从流体动力学的角度解决细粒和超细矿物浮选问题提供指导。确定研究差距并建议未来工作的机会。已经讨论了浮选动力学、细泡生成、矿物粒度增大和机械夹带。介绍了文献中表达的最新想法,以及通过使用反应器-分离器概念的池设计中的流体动力学优化来改进细粒浮选的最新进展。该综述可提高对浮选流体动力学的整体认识,并为从流体动力学的角度解决细粒和超细矿物浮选问题提供指导。确定研究差距并建议未来工作的机会。以及使用反应器-分离器概念通过池设计中的流体动力学优化来改进细粒浮选的最新进展。该综述可提高对浮选流体动力学的整体认识,并为从流体动力学的角度解决细粒和超细矿物浮选问题提供指导。确定研究差距并建议未来工作的机会。以及使用反应器-分离器概念通过池设计中的流体动力学优化来改进细粒浮选的最新进展。该综述可提高对浮选流体动力学的整体认识,并为从流体动力学的角度解决细粒和超细矿物浮选问题提供指导。确定研究差距并建议未来工作的机会。

更新日期:2021-09-27
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