Abstract Axial dispersion in column flotation is critical for optimizing particle-bubble interaction and maximizing recovery. The effect of different flotation frothers on axial gas dispersion rates in a column flotation cell were measured using electrical resistance tomography (ERT). Gas holdup can be measured using ERT and utilized in the determination of axial gas dispersion rate in the column. The ERT is constructed with two sensor planes making it possible to simultaneously capture gas holdup values at and immediately above the cavitation sparger. Three frothers of varying strengths were used to investigate axial dispersion rates. Experimental conditions were modified by altering the superficial gas rate, frother concentration, and sparger pump speed. Utilizing a two-phase (gas–liquid) system, the effects of varying experimental conditions were captured and are represented using concentration tomograms. There is a strong positive correlation between axial dispersion rate, frother strength, and machine operating parameters.

中文翻译：

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电阻层析成像测量的起泡强度对空化分布器中气体分散的影响

摘要 柱浮选中的轴向分散对于优化颗粒-气泡相互作用和最大化回收率至关重要。使用电阻断层扫描 (ERT) 测量不同浮选起泡剂对柱式浮选池中轴向气体扩散率的影响。气体滞留率可以使用 ERT 进行测量，并用于确定色谱柱中的轴向气体扩散率。ERT 由两个传感器平面构成，从而可以同时捕获空化分布器处和正上方的气体保持率值。三种不同强度的起泡剂用于研究轴向分散率。通过改变表观气体速率、起泡浓度和喷射泵速度来修改实验条件。利用两相（气-液）系统，捕获了不同实验条件的影响，并使用浓度断层图表示。轴向分散率、起泡强度和机器操作参数之间存在很强的正相关关系。