ABSTRACT

Literature shows that flotation is highly size dependent and processing both coarse and fine size fractions is problematic. The latter is the subject of the current paper. Fine particles have a relatively high surface area, and therefore more reagents are needed for their processing. In addition, the problem of fine particle flotation is mainly due to their low collision and attachment efficiencies with bubbles. Several strategies are proposed in the literature to overcome the problems of fine particle flotation. They mainly rely on increasing particle size by selective aggregation and decreasing the bubble size by using nano or microbubbles, but also on using reactor-separator type flotation cells which promote a much stronger particle–bubble interaction. The pros and cons of these strategies are discussed in this paper.

摘要

文献表明浮选高度依赖于粒度，并且处理粗粒度和细粒度级分是有问题的。后者是当前论文的主题。细颗粒具有相对较高的表面积，因此需要更多的试剂进行处理。此外，细颗粒浮选的问题主要是由于它们与气泡的碰撞和附着效率低。文献中提出了几种策略来克服细颗粒浮选的问题。它们主要依赖于通过选择性聚集来增加颗粒尺寸并通过使用纳米或微气泡来减小气泡尺寸，但也依赖于使用反应器 - 分离器型浮选槽来促进更强的颗粒 - 气泡相互作用。本文讨论了这些策略的优缺点。