Abstract In this study, a conductivity sensor was designed that allows the vertical water content profile of a two-phase flotation froth to be measured with a minimum vertical measurement resolution of 15 mm. The conductivity sensor consists of 32 ring electrodes, three of which measuring the collection zone gas holdup and 29 measuring the water content in the froth zone at various heights. The sensor was applied to study the water content profile for three increasing average molecular weight polypropylene glycols (PPG 425, PPG 725 and PPG 1000), under various operating conditions (1.0–3.0 cm s−1 input gas velocity and 5–45 ppm frother concentrations). For all conditions, a large increase in a defined degradation function occurred at 70–80% of the froth equilibrium height, indicating a point where small increases in froth height will have large effects on the froth stability.

中文翻译：

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通过电导率测量的两相浮选泡沫的垂直含水量分布

摘要 在本研究中，设计了一种电导率传感器，能够以 15 mm 的最小垂直测量分辨率测量两相浮选泡沫的垂直含水量分布。电导率传感器由 32 个环形电极组成，其中 3 个测量收集区的气体保持率，29 个测量不同高度的泡沫区中的水含量。该传感器用于研究三种平均分子量逐渐增加的聚丙二醇（PPG 425、PPG 725 和 PPG 1000）在各种操作条件下（1.0–3.0 cm s-1 输入气体速度和 5–45 ppm 起泡剂）的含水量分布。浓度）。对于所有条件，定义的降解函数在泡沫平衡高度的 70-80% 处出现大幅增加，