TU Bergakademie Freiberg Data Publications
Permanent URI for this collection
Data publications from research of Freiberg University of Mining and Technology.
Browse
Recent Submissions
Now showing 1 - 5 of 10
- ItemOpen AccessRobust Laser Cross Detection(Technische Universität Bergakademie Freiberg, 2024-12-12) Kluwe, Moritz Niklas; Hardege, RobertThe source code repository contains the complete Python implementation of the laser cross detection algorithm, including example datasets. The repository includes synthetic image generation tools, evaluation scripts, and reference implementations of RANSAC and Probabilistic-Hough-Transform methods for comparison. Example datasets feature both synthetic and real-world calibration images, with documentation detailing their usage. All code is thoroughly commented and includes usage examples. The implementation requires common Python libraries (numpy, scipy, lmfit) and provides a straightforward API for integration into existing calibration workflows.
- ItemOpen AccessInfluence of a pyrolysis at different temperatures on the mechanical recycling efficiency of Li-ion batteries(Technische Universität Bergakademie Freiberg, 2024-12-12) Kaas, Alexandra; Wilke, Christian; Born, Jannik; Ahuis, Marco; Kwade, Arno; Peuker, UrsThe integration of a pyrolysis stage into the mechanical recycling process of Li-ion batteries is supposed to improve the decoating of the electrodes, the recovery of valuable components and the overall quality of the products. The effectiveness of the pyrolysis process depends on the applied temperature as the various components of a Li-ion battery melt, evaporate and decompose at different temperatures. The decomposition temperature of the cathode binder is a crucial factor in the thermal mechanical recycling process. Temperatures below this threshold have a negative impact on the recovery rates, as the melting of binder and plastics reduces the efficiency of the recovery process. Conversely, higher temperatures facilitate the recovery of the cathode coating metals (Ni, Co, Li) into the black mass. The majority of the metals (92-98%) are recovered and, following hydrometallurgical treatment, can be reused for cell production, thereby closing the loop and reducing the consumption of raw materials and enhancing the sustainability of batteries. Moreover, the decomposition of the organic components, including binders and plastics, improves the quality of the products, thereby reducing the necessity and extent of further treatment.
- ItemOpen AccessResearch data for: “Forces during film drainage and detachment of NMC and spherical graphite in particle-bubble interactions quantified by CP-AFM and modeling to understand the salt flotation of battery black mass”(Technische Universität Bergakademie Freiberg, 2024-12-09) Nicklas, JanThis dataset characterizes the particle-bubble interaction for single battery black mass particles (NMC 622 and spherical graphite) in sodium chloride solutions (0.001 mol/L to 0.750 mol/L) for pH 3 to pH 10. The interaction of black mass particles with gas bubbles in the AFM-geometry gives information about the likeliness of particle-bubble-attachment and detachment in salt flotation. The research data consists of two parts: A) the Experimental Atomic Force Microscopy data for the interaction of black mass particles (NMC 622 (NMC) and spherical graphite (SG)) with sessile gas bubbles in salt solutions and B) the Data for the key figures of “Forces during film drainage and detachment of NMC and spherical graphite in particle-bubble interactions quantified by CP-AFM and modeling to understand the salt flotation of battery black mass”.
- ItemOpen AccessCorrelative X-ray micro-Computed Tomography (X-µCT) scans of Engineered Artificial Minerals (EnAM)(Technische Universität Bergakademie Freiberg, 2024-11-07) Siddique, Asim; Schröer, LaurenzCharacterizing complex particulate materials like slag using X-ray microcomputed tomography (μCT) is challenging due to minimal grey-scale contrast from similar attenuation properties among phases and intricate microstructures. To address this problem, we developed a standardized multi-scale correlative methodology that combines μCT at different resolutions with scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS) and X-ray fluorescence (XRF). By scanning large samples for statistical significance and sub-samples at higher resolutions, we capture detailed microstructures. Aligning SEM-EDS data with μCT scans using inherent markers enables accurate phase segmentation. Mineral mapping from SEM-EDS can help to train segmentation models for μCT data, overcoming μCT limitations and allowing precise 3D mineralogical characterization. This approach provides a robust framework for analyzing complex slag particles. This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 101005611 https://excite-network.eu.
- ItemOpen AccessRohdaten für Dissertation "Kinetische Studie der Umbenetzungsagglomeration als Basis für die zweidimensionale formselektive Trennung von Partikelgemischen"(Technische Universität Bergakademie Freiberg, 2024-10-02) Schreier, JuliaDieser Datensatz enthält die Rohdaten zur Dissertation "Kinetische Studie der Umbenetzungsagglomeration als Basis für die zweidimensionale formselektive Trennung von Partikelgemischen". Um Partikelgemische hinsichtlicher ihrer Primärpartikelform mit Hilfe der Umbenetzungsagglomeration trennen zu können, muss der Prozess in der Benetzungsphase abgebrochen werden. Um diesen Zeitpunkt bestimmen zu können, kann das Rührerdrehmoment genutzt werden, da damit die Prozesskinetik in-line bestimmt werden kann. Um diese Annahme zu beweisen, wurden zu unterschiedlichen Zeitpunkten Proben aus der Umbenetzungsagglomeration entnommen und mittels Mikroröntgentomographie (µ-CT) und dreidimensionaler Bildverarbeitung analysiert. Die Agglomeratgröße am Ende des Prozesses wurde mit zweidimensionaler Bildverarbeitung bestimmt.