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首页> 外文会议>Italian Conference on Chemical and Process Engineering(ICheaP-6) vol.2; 20030608-11; Pisa(IT) >Application of in line optical methods to the characterization of aggregate size and morphology in stirred suspensions
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Application of in line optical methods to the characterization of aggregate size and morphology in stirred suspensions

机译：在线光学方法在搅拌悬浮液中骨料尺寸和形态表征中的应用

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摘要

Information about the aggregation state of fine particles is important in many cases of industrial slurries. When aggregates are small or fragile objects, their withdrawal is difficult and off-line characterization may be a source of error. This work deals with the application of different in line methods to the characterization of silica aggregate size and morphology. These methods are based on turbidimetry. One of them consists of the analysis of the turbidity fluctuations and is operated on a commercial instrument. The other one uses the aggregate settling velocity which is determined by turbidimetry too, however with a home-made apparatus. This work gives us the opportunity to define morphological models for small aggregates and to calculate their drag coefficient. Thanks to these models, the aggregate morphological characteristics and their number of primary particles can be derived from the experimental results. Agreement between the different methods is examined and discussed.
机译：在许多工业浆料中，有关微粒聚集状态的信息很重要。当聚集体是小物体或易碎物体时，很难将其撤出，脱机表征可能是错误的来源。这项工作涉及不同的在线方法在二氧化硅聚集体尺寸和形态表征中的应用。这些方法基于浊度法。其中之一包括浊度波动的分析，并在商用仪器上进行操作。另一者也使用由浊度法确定的总沉降速度，但是使用自制设备。这项工作使我们有机会为小型骨料定义形态模型并计算其阻力系数。由于这些模型，可以从实验结果中得出聚集的形态特征及其一次颗粒的数量。研究并讨论了不同方法之间的一致性。

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