Property Function to Compute the Dustiness of Powders

计算粉末含尘量的属性函数

• 批准号: 238865079
• 负责人: Professor Dr.-Ing. Eberhard Schmidt
• 金额: --
• 依托单位: Institut für Partikeltechnologie (IPT)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/238865079?language=en
• 关键词: Property; Function; Compute; Dustiness; Powders

The dustiness of a disperse solid can be understood as a property, which when handled in a gaseous environment, behaves similar to an aerosol, releasing the respective particle fraction of given quantity and size distribution. In general, this release of dust is undesirable because it might result in material loss and often is associated with an exposure of personnel involved or represents a risk of environmental pollution.The dustiness is therefore a product property, which might change along the process path, for example through comminution, agglomeration, classification or mixing of solids involved. Property functions which describe time variable dustiness integrated in dynamic processes as a function of the distribution of particle size, particle shape, and particle interaction during a certain handling, are to be determined as part of this project.For this purpose, experiments with laboratory equipment such as free fall in still air, moving in a rotating drum, dispersion, pressure surges method or airflow dispersion will be performed at very well defined boundary conditions and physically based models will be established. These models will be improved through the introduction of the so called Fractionated grade of release. Together with the description of time-dependent changes of the related strain-functions (apparatus properties) and rigidity-functions (material properties) this approach will help to better predict transient processes of dustiness. The discovered property functions will be evaluated for their suitability in practice in cooperation with project partners with respect to application.

分散固体的灰尘性可以理解为一种特性，当在气态环境中处理时，其表现与气溶胶相似，从而释放给定数量和尺寸分布的各个粒子分数。通常，这种粉尘的释放是不受欢迎的，因为它可能导致物质损失，并且通常与涉及人员的暴露或代表环境污染的风险有关。因此，尘土是一种产品特性，可能会沿过程路径发生变化，例如通过粉碎，聚集，凝聚，分类，固体混合或涉及的固体混合。将在某个项目的一部分中确定粒径，粒子形状和粒子相互作用的分布的函数，这些函数描述了在动态过程中积分的时间变化灰尘，这是该项目的一部分。对于此目的，对静态空气（如静止空气）的实验，在旋转的旋转鼓中移动，分配方法或空气流量分散良好的条件，并且在旋转的旋转式旋转式的旋转式且符合性能的条件下，并在旋转的情况下进行了良好的符合条件，并在符合性的条件下，并符合符合条件的条件。这些模型将通过引入所谓的释放等级来改进。连同描述相关应变功能（设备特性）和刚性功能（材料特性）的时间相关变化，此方法将有助于更好地预测灰尘的短暂性过程。发现的财产功能将在与项目合作伙伴合作的实践中评估其适用性。