1. Process Metallurgy Research Unit University of Oulu P.O. Box 4300 Oulu 90014 Finland
2. Research Unit of Sustainable Chemistry University of Oulu P.O. Box 4300 Oulu 90014 Finland
3. Environmental and Chemical Engineering Research Unit University of Oulu Oulu Finland
4. Tornio R&D Center Outokumpu Stainless Oy Tornio 95490 Finland