1. Division of Materials Science, Luleå University of Technology, S-971 87 Luleå,
Sweden
2. Luossavaara-Kiirunavaara Aktiebolag (LKAB), S-971 28 Luleå, Sweden
3. Energy Engineering, Division of Energy Science, Luleå University of Technology, S-971 87 Luleå, Sweden
4. Energy Technology Centre (ETC), Box 726, S-941 28 Piteå, Sweden
5. Energy Technology
and Thermal Process Chemistry (ETPC), Umeå University, S-901 87 Umeå, Sweden