ABSTRACT

In reuse of process water in flotation plants, the inability to measure residual frother concentrations in both flotation and plant water circuits in real time has created challenges for flotation process control. We previously developed a simple and fast method to measure frother concentration based on the guest–host interactions between frother molecules and specially formulated liquid comprising cyclodextrin and pyrene. In the present study, the formulation and analysis procedure were upgraded to further improve the measurement sensitivity. The potential of the present method was demonstrated through methyl isobutyl carbinol (MIBC) concentration measurement at six different locations across an industrial coal flotation circuit. The measured MIBC distribution was in good agreement with that obtained using the colorimetric method developed by Finch and coworkers at McGill University. The implications of the established MIBC distribution in the coal flotation circuit for frother dosing and water reuse were discussed.

摘要

在浮选厂工艺水的再利用中，无法实时测量浮选和工厂水回路中残留的泡沫浓度，这给浮选过程控制带来了挑战。我们之前开发了一种简单快速的方法来测量起泡剂浓度，该方法基于起泡剂分子与包含环糊精和芘的特殊配制液体之间的客体-宿主相互作用。在本研究中，升级了配方和分析程序，以进一步提高测量灵敏度。通过在工业煤浮选回路的六个不同位置测量甲基异丁基甲醇 (MIBC) 浓度，证明了本方法的潜力。测得的 MIBC 分布与使用麦吉尔大学 Finch 及其同事开发的比色法获得的分布非常一致。讨论了煤浮选回路中已建立的 MIBC 分布对起泡剂剂量和水回用的影响。