Semi-Mechanistic Modelling of Fracture Mechanisms of Engineered Artificial Minerals

工程人造矿物断裂机制的半机械模拟

• 批准号: 470554192
• 负责人: Professor Dr.-Ing. Carsten Schilde
• 金额: --
• 依托单位: Institut für Partikeltechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/470554192?language=en
• 关键词: Semi; Mechanistic; Modelling; Fracture; Mechanisms

The importance of complex high-tech products, for example in the fields of energy storage as well as sensor technology, life science and human health, is increasing rapidly. The associated increasing complexity of material composites and function-integrated components poses even greater challenges regarding closed material cycles and, thus, making valuable raw materials permanently available, e.g. in electro mobility. This is especially true in the area of metallic materials and rare earths, which often accumulate within a pyrometallurgical treatment in the form of slags with an unclear, widely distributed material composition. The different material compositions, phase interactions, crystallite and particle sizes and morphologies pose great challenges for the selective comminution and subsequent separation of the individual material phases. Due to the complex composition of the EnAM particles, the model approaches developed in the last decades for the description of the breakage mechanisms of natural minerals and homogeneous synthetic materials as well as the individual process unit models are no longer sufficient. The logical consequence of this is that new breakage and strength models have to be developed especially for multi-component EnAM particles depending on the complex phase composition and structural parameters (e.g. crystallite and particle sizes and particle morphologies). This task and the associated challenge of detailed structure elucidation and defined mechanical loading of the EnAM particles is addressed by this proposed project. In detail, models for the breakage probability rate, respectively, and multi-variate breakage function as well as mechanical deformation behavior and strength of the individual particles are to be determined and implemented in a discrete element simulation environment (DEM) and flowsheet simulation (DynSim, in the second funding period) to predict different comminution processes.

复杂的高科技产品的重要性正在迅速增加，例如在能源存储以及传感器技术、生命科学和人类健康领域。材料复合材料和功能集成组件的相关复杂性不断增加，这对封闭的材料循环提出了更大的挑战，从而使有价值的原材料永久可用，例如在电动汽车中。在金属材料和稀土领域尤其如此，它们经常在火法冶金处理中以炉渣的形式积累，其材料组成不清楚，分布广泛。不同的材料组成、相相互作用、微晶和颗粒尺寸以及形态对选择性粉碎和随后分离各个材料相提出了巨大的挑战。由于EnAM颗粒的复杂组成，过去几十年中开发的用于描述天然矿物和均质合成材料的破碎机制以及单个过程单元模型的模型方法不再足够。其逻辑结果是，必须开发新的断裂和强度模型，特别是对于多组分EnAM颗粒，这取决于复杂的相组成和结构参数（例如，微晶和颗粒尺寸以及颗粒形态）。这项任务和相关的挑战，详细的结构说明和定义的机械负载的EnAM颗粒是解决这个拟议的项目。详细地说，破碎概率率模型，分别和多变量破碎函数以及机械变形行为和强度的单个颗粒将被确定和实施在离散元模拟环境（DEM）和流程模拟（DynSim，在第二个资金周期），以预测不同的粉碎过程。