Fine grinding of multicomponent systems in stirred media mills

多组分系统的粉碎引入了一系列关于粉碎本身的基本物理理解的科学问题，包括分析和评估。此外，多组分研磨发生在许多工业应用中，如回收、矿物工业、机械化学或建筑材料。在过去的几年里，搅拌介质米尔斯磨中的单组分细磨得到了广泛的研究，并且可以用基于物理的过程模型来描述。与此相反，无论是多组分混合物的粉碎还是粉碎复合系统都不能用这些模型来描述，并且关于粉碎结果的评估/分析的几个问题正在出现。本研究计划着重于系统地研究研磨多组分体系及相关的分析技术。应根据增加的选择性、效率以及对工艺和材料参数的依赖性来评估特定材料混合物的粉碎行为。此外，需要研究物料结构对粉碎的影响。因此，应研究具有本质上不同形态的材料以及复合材料，并将其与单一组分的等效混合物进行比较。在实验结果的基础上，现有的过程模型应进一步发展，使比能量需求的多组分粉碎的描述。其目的是获得一个深刻的，基本的过程理解的湿式多组分粉碎，并在此基础上，发展新的方法来描述多组分粉碎。

The comminution of multicomponent systems introduces a series of scientific questions regarding the basic physical understanding of comminution itself, including analysis and evaluation. Moreover, the multicomponent grinding occurs in many industrial applications like recycling, mineral industries, mechanochemistry or building materials. Fine grinding of single components in stirred media mills was studied intensely during the past years and can be described by physical based process models. In contrast, neither the comminution of multicomponent mixtures nor the comminution composite systems can be described by these models yet and several questions regarding the evaluation/analysis of the grinding result are coming up. This research proposal focuses on the systematic investigation of grinding multicomponent systems and related analysis techniques. The comminution behavior of defined material mixtures should be evaluated with respect to increased selectivity, efficiency and dependency on process and material parameters. Furthermore, the impact of material structure on the comminution needs to be investigated. Therefore, materials with intrinsically different morphologies as well as composite materials should be investigated and compared to equivalent mixtures of single components. Based on experimental results, an existing process model should be further developed to enable the description of specific energy requirement of multicomponent comminution. The purpose is to gain a deep, fundamental process understanding of wet multicomponent comminution and based on that, the development of new approaches for the description of multicomponent comminution.