Production of refractory metal powders with special properties

Project Manager: Dipl.-Ing. Johanna Bolitschek Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold The goal of this doctoral thesis is the production of refractory metal powders for Cold Gas Spraying. To guarantee the deposition of new thin films materials during this process many powder characteristics such as morphology and mechanical properties has to be considered. To identify the […]

Hydrometallurgical recycling of residues

Project Managers Dipl.-Ing. Eva Gerold Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold Through process and technology development for the processing of complex residues with varying composition in the field of metallurgy as well as a development of methods for the simultaneous multi-metal recovery from primary and secondary sources, an improvement of the raw material availability can be […]

Concepts for optimization of cemented carbides recycling

Project Managers: Dipl.-Ing. Dr.mont. Tamara Ebner Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold The objective of this thesis comprises the development of an integrated recycling concept for coated carbide cutting tools, which enables ecological, economical as well as strategical process optimizations. The reconditioning of cemented carbides represents a particular challenge based on the excellent properties of this […]

Recycling of Drill Bits

Project Managers: Dipl.-Ing. Claudia Kerschbaumer Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold The aim of the project as a part of the `Christian Doppler Laboratory for Extractive Metallurgy of Technological Metals´ is to devise a method to recycle bits for oil and gas drilling that is both industrially applicable and economically reasonable. The PDC bit of the […]

Process development for recycling of contaminated hard scrap

Project Manager: Dipl.-Ing. Gregor Kücher Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold This study is concerned with the elaboration of an alternative hydrometallurgical method for reconditioning of hard metal residues, which avoids the state of the art. Therefore a leaching step removes adhered coating material as the binder metal. For the remaining hard phase contingent a suitable […]

Recycling of tantalum containing residues

Project monitoring: Dipl.-Ing. Dominik Hofer Priv.-Doz. Dipl.-Ing. Dr.mont. Stefan Luidold Synthetic tantalum concentrate for the production of pure tantalum is produced by a multistage pyrometallurgical process. The main focus of this study is the investigation of the melting process in an electric arc furnace and the optimisation of metal/slag separation for an increased tantalum output […]