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复杂性不断增加，对封闭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：在电迁移率方面。在金属材料和稀土领域尤其如此，它们通常在火法冶金处理中以炉渣的形式积累，其材料成分不明确、分布广泛。不同的材料成分、相相互作用、微晶和颗粒尺寸以及形态对单个材料相的选择性粉碎和随后的分离提出了巨大的挑战。由于 EnAM 颗粒的复杂组成，过去几十年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工艺单元模型的模型方法已不再足够。其逻辑结果是，必须根据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）开发新的断裂和强度模型，特别是针对多组分 EnAM 颗粒。本提议的项目解决了这项任务以及 EnAM 颗粒的详细结构阐明和定义的机械载荷的相关挑战。具体而言，将在离散元模拟环境 (DEM) 和流程图模拟 (DynSim) 中确定和实施破碎概率模型、多变量破碎函数以及单个颗粒的机械变形行为和强度。 ，在第二个资助期）来预测不同的粉碎过程。