**Author details**

Marcela Achimovičová1,2\*, Christoph Vonderstein3 and Bernd Friedrich3

\*Address all correspondence to: marcela.achimovicova@tu‐clausthal.de

1 Institute of Mineral and Waste Processing, Waste Disposal and Geomechanics, University of Technology‐Clausthal, Germany

2 Institute of Geotechnics, Slovak Academy of Sciences, Košice, Slovakia

3 IME Process Metallurgy and Metal Recycling, RWTH Aachen University, Germany
