The Reflux Flotation Cell (RFC) utilises the Boycott Effect to decouple the overflow water flux from the gas flux, permitting in principle high product grade and recovery at a vastly higher volumetric feed flux. This study investigated this relationship between concentrate grade, recovery, and volumetric feed throughput using a single flotation stage and feed fluxes spanning 1–9 cm/s, well beyond that used in conventional flotation. Coal flotation tailings and hydrocyclone overflow provided convenient representations of “binary” feeds for the experiments, constituting liberated hydrophobic and hydrophilic particles. The results demonstrated robust recoveries through the preservation of the gas to feed flux ratio with increasing feed flux, while minimising the gas flux strengthened the capacity to maintain high product grade using inverted fluidization water as the wash water. Remarkably, a high product grade (low product ash%) was maintained over the extreme feed flux range by ensuring a net downwards flux of wash water delivered through the upper fluidized bed of bubbles. Coal Grain Analysis (CGA), an optical imaging technique, identified the maceral composition of the feed particles and validated, with close agreement, the RFC steady state separation performance. Indeed, under continuous operation the RFC data demonstrated an overall positive shift in performance relative to that of the standard tree flotation curve. The findings showed strong preservation of product grade and recovery using a single RFC stage, over a seven-fold increase in the feed flux relative to conventional flotation systems.

回流浮选池（RFC）利用抵制效应将溢流水通量与气体通量解耦，原则上可实现高产品等级，并以高得多的体积进料通量进行回收。这项研究调查了单个浮选阶段精矿品位，回收率和饲料进料量之间的这种关系，饲料通量范围为1–9 cm / s，远远超过了常规浮选所用的流量。煤浮选尾矿和水力旋流器溢流为实验提供了“二元”进料的便捷表示，构成了释放的疏水和亲水颗粒。结果表明，随着进料流量的增加，气体进料流量的比率得以保持，从而实现了稳健的回收率，同时使用反向流化水作为洗涤水，最大限度地减少了气体通量，从而增强了保持高产品等级的能力。值得注意的是，通过确保通过上部气泡流化床输送的洗涤水的净向下净通量，在极限进料通量范围内保持了较高的产品等级（较低的产品灰分％）。煤炭颗粒分析（CGA）是一种光学成像技术，可识别进料颗粒的宏观组成，并以非常一致的方式验证RFC稳态分离性能。实际上，在连续操作下，RFC数据显示出相对于标准树浮选曲线而言，性能总体上呈正向变化。调查结果表明，使用一个RFC阶段就可以很好地保护产品等级和回收率，