**About the Editors**

**Henrik Sax ´en** is Professor in Heat Engineering and has been working at the Process and Systems Engineering Laboratory of Faculty of Science and Engineering, Abo Akademi University, Finland, ˚ since September 1997. Prior to this, he held different positions at the (former) Department of Chemical Engineering of the same university. He completed his M.Sc. in Chemical Engineering on Process Control in 1983 and his doctoral work on mathematical modeling of blast furnaces in 1988 at the same department. Prof. Saxen's primary research is on modeling, simulation, interpretation, and ´ optimization of industrial processes and energy systems, with particular focus on sustainable and efficient iron- and steelmaking technology. He has collaborated extensively with universities and companies, and has participated in many national and international R&D projects on iron- and steelmaking, e.g., within the framework of EU Research Funds for Coal and Steel. He has published around 170 international peer-reviewed journal papers, and has supervised more than 20 doctorate and 90 master's students. He has or is currently serving on the editorial boards of numerous journals, including *Metals*, *ISIJ International*, and *Heliyon*, and serves as reviewer for more than 60 scientific journals. He has also edited several Special Issues of international journals on modeling in ironand steelmaking. Prof. Saxen's teaching activities are mainly in the field of process engineering, ´ including courses on heat and mass transfer, thermodynamics, refrigeration, energy technology, process modeling and optimization, as well as AI and neural networks. He was Dean of the Faculty of Chemical Engineering of Abo Akademi University in 1998–2000 and Vice Rector (Research) of the ˚ same university in 2006–2009. He has served as Visiting Professor of Shanghai University, China, since 2017.

**Marco A. Ram´ırez-Arg´aez** is a Metallurgical Chemical Engineer and graduate of UNAM, where he received his master's degree in Metallurgical Engineering from the Saltillo Unit CINVESTAV, and doctorate in Materials Science and Engineering from MIT in the USA. Since receiving his Ph.D. degree, his main line of research has been focused on metallurgical process engineering, specialized in mathematical and physical modeling. He has worked in the foundry of nodular and gray irons as well as aluminum, TIG electric arc welding, in steel processes such as the electric arc furnace and steel ladle, and in the desalination of crude oil developing fundamental mathematical models based on first principles as the transport of mass, energy, and momentum are solved with numerical methods such as control volume and finite element. His academic production consists of 56 articles published in international peer-reviewed journals indexed in the JCR, 49 bachelor students and 27 master's students, and three completed doctorates. He has directed 13 academic projects as well as 7 industrial projects. He has applied for 6 patents, 3 in Mexico, 1 in the USA, 1 in Germany, and 1 in Brazil. He has served as a referee in 34 international journals in the field of materials science and metallurgy. He is currently a Full-Time Professor at the Faculty of Chemistry of the UNAM, as well as Level 2 of the National Autonomous System of Mexico. He has received several international and national recognitions, which includes the following highlights: Geoffrey Belton Award given by the United States Steelworkers Association for the best doctoral thesis in 2001, the RUNJA (National University Recognition for Young Academics) award in the teaching area of Exact Sciences in 2009, the Gabino Barreda Medal for the best average of the IQM career at UNAM and the medal for the best student in Mexico given by the Diario de Mexico, first place in patents from UNAM in 2018 from the Program ´ for the Promotion for Patenting and Innovation, as well as second place in the national technology award of the National Chamber of the Steel Industry (CANACERO) in 2011.

**Alberto N. Conejo** (Cuitzeo Mexico, 25 September1959) has served as Professor at the University of Science and Technology Beijing (USTB) at the School of Metallurgical and Ecological Engineering since September 2018. Prior to this, he was Professor of Ironmaking and Steelmaking in Mexico for 30 years. He also worked for several metallurgical plants from 1982 until 1988 in several positions. His PhD in Metallurgy was completed at Colorado School of Mines in Golden CO, USA. His Ph.D. thesis was related to gas–solid reactions and the production of iron carbide from iron oxides. During more than 15 years, he had a strong collaboration with the steel industry in Mexico, in particular, with ArcelorMittal Lazaro Cardenas. He has provided more than 1200 hours of technical training on ironmaking and steelmaking to union workers, supervisors, and process engineers. Has served as Visiting Professor at Tokoku University; ArcelorMittal laboratories in Aviles, Spain; University of Science and Technology Beijing (USTB), China; and Indian Institute of Technology Kanpur, India. He has received several national and international awards, including Charles W. Briggs award 2002, Iron and steel society, USA; Best paper award on EAF steelmaking; Michoacan State award—Technology award, 2005, for work on EAF slag foaming; National award ´ (2nd place)—Technology and Science award granted by the Mexican Steel Producers Association (Canacero), 2010/2011 for work on EAF modeling. He has been a member of the National System of Researchers (SNI), at Level II (top 18% nationwide) in 2018–2021 and was Level II member during 2014–2017. He has served as an editorial board member of *Metallurgical Research and Technology* (previously *Revue de Metallurgie*) since January 2017 and *International Journal of Minerals, Metallurgy and Materials* (Beijing, China) since July 2019. He has published more than 60 technical papers in journals, with h-index = 15 (Scopus). He has supervised or co-supervised 18 master's and 2 Ph.D. students.

**Abhishek Dutta** is a Chemical Engineer and graduate of the University of Madras and Jadavpur University, both in India. He obtained his Ph.D. in Chemical Engineering from Ghent University, Belgium, in mathematical modeling using population balances for FCC catalysts. He then continued postdoctoral research in Bioengineering at the same University, again using the concept of population balances for cell heterogeneity. Since 2013, he has served as a Full-Term Visiting Assistant Professor at the Faculty of Engineering Technology at KU Leuven, Campus Groep T. He became involved in academic–industrial projects as a part of capacity development in translational research from February 2020. His academic production consists of around 50 articles in international peer-reviewed journals indexed in the JCR, 20 master's students, and three ongoing doctorates under his co-supervision. He is currently Associate Professor, full-time, at Izmir Institute of Technology in Turkey. His research includes development of energy-efficient processes focusing on the improvement of existing and development of new chemical (and biochemical) process technologies, resource-efficient high-temperature processes involving complex hydrodynamic and reactive phenomena, and cost-efficient experimentally driven mathematical models valorizing waste resource recovery. He has won one European research grant, been co-awarded one Belgian VLIR-UOS grant, and has obtained numerous grants from industries. He is a Life Member of the Indian Institute of Chemical Engineers.
