Developing critical coalescence concentration curves for industrial process waters using dilution
Developing critical coalescence concentration curves for industrial process waters using dilution
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DOI：
10.1016/j.mineng.2013.06.011
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发表时间：
2013-09
影响因子：
4.8
通讯作者：
M. Nassif;J. Finch;K. Waters
中科院分区：
文献类型：
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作者：
M. Nassif;J. Finch;K. Waters
临界聚结浓度（CCC）通常用于表征起泡剂。CCC由Sauter平均气泡尺寸（D32）对起泡剂浓度的图确定，在此称为“添加”方法。工业浮选系统可能会遇到许多天然存在的表面活性剂和盐，这些表面活性剂和盐也会影响气泡大小。实际上，有一个“系统”CCC。本文介绍了一种稀释法鉴别系统CCC的方法。本研究验证了使用市售起泡剂DF-250的稀释技术。结果表明，系统CCC可以表示为一个等效的DF-250浓度，以提供上下文和比较水样的手段。还探讨了使用气含率来估计工艺用水D32的可行性。为了说明该程序，检查了来自Albian Sands沥青加工厂的三个工艺用水样品。它们被证明是相似的，并产生了相当于约20 ppm DF-250的体系CCC。它的结论是，稀释和起泡剂等效技术可以用来帮助识别系统的流体动力学特性。
Critical coalescence concentration (CCC) is commonly used to characterize frothers. The CCC is determined from a plot of Sauter mean bubble size (D32) vs. frother concentration, referred to here as the ‘addition’ method. Industrial flotation systems can encounter a number of naturally occurring surfactants and salts that also influence bubble size. In effect there is a ‘system’ CCC. This paper introduces a dilution method to identify the system CCC. The study verifies the dilution technique using the commercial frother DF-250. It is shown that the system CCC can be expressed as an equivalent DF-250 concentration to provide context and a means of comparing water samples. The viability of using gas holdup to provide an estimate of process waterD32is also explored. To illustrate the procedure three samples of process water from the Albian Sands bitumen processing plant were examined. They proved to be similar and yielded a system CCC equivalent to about 20 ppm DF-250. It is concluded that the dilution and frother equivalent techniques can be used to help identify system hydrodynamic properties.