Central project - Slag synthesis, design and characterization

该项目将冶金炉渣生成和机械炉渣配方以及相应的表征相结合。该项目对PP的服务特性来自于为后续项目提供定义的配方和特征化的炉渣样品，因为在第一个供资期的早期阶段，有必要提供足够数量的含炉渣的EnAM，以使PP运行。选择的EnAM系统是LiAlO 2 n*SiO2，其通常在冶金锂离子电池回收期间出现在Al-Ca-Mg炉渣系统中。该服务包括具有给定组成以及限定粒度的含EnAM颗粒的炉渣的可再现合成。此外，在将固化炉渣供应到PP内之前，必须针对粒度范围和粒度分布来定制固化炉渣。此外，有必要提供关于Li-EnAM颗粒的浓度和尺寸（分布）的基本信息。这就是这个中心工程的全部服务任务。该中心项目的研究部分集中在两个领域：冶金工程调查和量化Li-EnAM系统的冶金加工性能，以补充服务合成和正在进行的3D几何表征方法及其应用的开发，以深入了解Li-EnAM系统的异质材料结构的结构和组成。基本的工程冶金挑战旨在研究加工和冷却参数对Li-EnAM性能的影响，例如晶粒尺寸、晶粒形状、产量、浓度或机械稳定性。表征部分旨在开发EnAM的整体表征方法，使用3D X射线断层扫描来量化固化渣的3D结构，元素和矿物组成。这将有助于理解体积结晶和偏析效应的分布性质。对层析图像进行图像分析，以推断不同颗粒和/或晶粒相关的几何尺寸和形状参数。一个进一步的重点将放在EnAM内的3D共生的确定，例如单个晶粒之间的相界。

The project works on a combination of metallurgical slag generation and mechanical slag formulation as well as corresponding characterization. The service character of the project towards the PP derives from the supply of defined formulated and characterized slag samples for further projects, since it is necessary to provide sufficient quantities of EnAM containing slags already in the early stage of the first funding period to make the PP operative. The EnAM system chosen is LiAlO2 n*SiO2, which typically occurs in a Al-Ca-Mg slag system during metallurgical Li-ion-battery recycling. The service comprises a reproducible synthesis of the slag containing EnAM grains with a given composition as well as defined grain size. Furthermore, the solidified slag has to be tailored concerning particle size range and the particle size distribution prior to the supplying it within the PP. Additionally, it is necessary to provide fundamental information on the concentration and size (distribution) of the Li-EnAM-grains. This is all the service task of this central project. The research part of the central project focuses on two areas: metallurgical-engineering investigations and quantification of the metallurgical processing properties of Li-EnAM-system complementary to the service-synthesis and the ongoing development of 3D-geometallurgical characterization methods and their application to create a deep insight in the structure and the composition of the heterogeneous material structure of the Li-EnAM system. The fundamental engineering-metallurgical challenge aims at the influence of the processing and cooling parameters on the properties of the Li-EnAM, e.g. grain-size, grain-shape, yield, concentration or mechanical stability. The characterizing part aims at the development of a holistic characterization method for the EnAM, to quantify the 3D-structure, elemental and mineralogical composition of the solidified slag using 3D X-ray tomography. This will help to understand the distributed nature of volumetric crystallization und segregation effects. The image analysis of the tomograms is developed to deduct different particle and or grain related geometrical size and shape parameters. One further focus will be put on the determination of the 3D-intergrowth within the EnAM, e.g. the phase boundaries between individual grains.