A non-invasive and non-intrusive monitoring techniques are developed based on the signal capacitance method to observe column flotation performance. In general, gas holdup and bubble flow characteristics are the essential parameters that affect flotation performance. This study investigates and verifies the effects of frother dosage and solid percent on the gas holdup and bubble flow transition characteristic by analyzing the capacitance signals. Experiments were conducted in two- and three-phase systems with a variation of frother addition and solid concentration in the range of 1–5 cm/s of superficial gas velocities. The results showed that the capacitance signals method could characterize the bubble flow and its transition in column flotation, which consists of discrete bubbly, cap-discrete bubbly, and slug flow. The bubble flow transition in the three-phase system occurred at slightly lower superficial gas velocity and gas holdup than in the two-phase system, as measured by the deviation of gas holdup analysis. Higher frother addition and the higher solid concentration will decrease the gas holdup of bubble flow transition. In this study, the flow transition occurred between the superficial gas velocity of 2.5–3.3 cm/s for 2 phase and 2.5–3 cm/s for 3 phase systems.

基于信号电容法开发了一种非侵入性和非侵入性的监测技术，以观察色谱柱的浮选性能。通常，气体滞留率和气泡流动特性是影响浮选性能的基本参数。本研究通过分析电容信号来研究和验证起泡剂用量和固体百分比对气体滞留率和气泡流动过渡特性的影响。实验在两相和三相系统中进行，起泡剂添加量和固体浓度在表观气体速度的1-5 cm / s范围内变化。结果表明，电容信号法可以表征气泡的流动及其在浮选过程中的过渡过程，该过程由离散气泡，帽顶离散气泡和团状流组成。三相系统中的气泡流动过渡发生在表观气体速度和气体滞留率略低于两相系统中，这是通过气体滞留分析的偏差测得的。较高的起泡剂添加量和较高的固体浓度将减少气泡流动过渡的气体滞留量。在这项研究中，在两相系统的表观气体速度为2.5–3.3 cm / s与三相系统的表观气体速度为2.5–3 cm / s之间发生了流动过渡。