Nichteisenmetallurgie, Nichteisen, Nichteisenmetalurgie, Metalurgie, Montan, Montanuni, Montanuniversität, Leoben, Metallurgie, Helmut Antrekowitsch, Stefan Pogatscher, Jürgen Antrekowitsch, Stefan Luidold, Stefan Steinlechner, Recyclingtechnik Leoben
Dipl.-Ing. Dr.mont.

Melanie Leitner


• Recycling of hard metals


Education/Professional experience

2002–2010Herta Reich Gymnasium Mürzzuschlag with focus on languages
2010–2011Year abroad in England und France
2011–2018Bachelor’s degree program in Industrial environmental protection and process engineering, University of Leoben, Austria (BSc)
2018–2019Master’s degree program in in Industrial environmental protection and process engineering, University of Leoben, Austria, with focus on metallurgical process engineering and recycling technologies
2019Graduation (Dipl.-Ing.)
Topic: Recycling processes of photovoltaic modules
2019–presentPhD student and research associate at Institute of Nonferrous Metallurgy, University of Leoben, Austria


Recycling of cemented carbides is carried out via the zinc process. The first stage of which takes place at temperatures between 900–1000 °C Since metallic zinc evaporates at 907 °C, a possibility exists that the reaction with the Co-binder between the tungsten carbides occurs with liquid or gaseous zinc or with a mixture of both. For a better understanding of the phase formation between the disintegrant and the binder material, as a strong simplification pure cobalt is used instead of WC Co carbides. In this way, trends derived from this basic data can be applied later and possible influences of several hard material components can be excluded. The aim of this dissertation is the finding of an experimental setup that allows the contacting of cobalt with pure gaseous zinc. With this, influences of temperature, duration, Zn:Co ratio and pressure can be investigated more detailed.


Leitner, M., S. Luidold, T. Ebner, C. Czettel und C. Storf: Contacting Cobalt with vaporous Zinc. Proceedings of European Metallurgical Conference (2021), Salzburg, Österreich (online)

M. Leitner, F. Winter, E. Gerold, S. Luidold, C. Storf, C. Czettl, L. Janka, T. Karhumaa, H. Antrekowitsch: 
Studies on the phase formation of cobalt contacted with zinc vapour. International Journal of Refractory Metals and Hard Materials 107 (2022) 105877. 


Leitner M: Contacting Cobalt with vaporous Zinc. European Metallurgical Conference (2021), Salzburg, Österreich, 2021