Efthymios Balomenos received his degree in Mining and Metallurgical Engineering from the National Technical University of Athens in 1995 and completed his PhD study in Thermodynamics from the same institute in 2006. He is currently a Senior Researcher at the Laboratory of Metallurgy. He is passionate in innovative metallurgical processing, focusing on resource preservation and climate change mitigation. He has authored and co-authored 43 publications in peer-reviewed journals and books and more than 45 publications and presentations at scientific conferences. His research interests include industrial residue (bauxite residue, metallurgical slags, spent catalyst, e-waste) valorization, critical metal extraction and recovery, alternative paths to metallic iron and aluminum production, innovation in alumina production, electric arc furnace processing, microwave processing, thermodynamic modeling, exergy accounting, circular economy, and others.