1. Process Metallurgy Research Unit University of Oulu P.O. Box 4300 FI-90014 Oulu Finland
2. Reseach & Development/Cokemaking & Ironmaking AG der Dillinger Huettenwerke Werkstrasse 1 66763 Dillingen/Saar Germany
3. Department Process Optimisation Iron and Steel Making VDEh-Betriebsforschungsinstitut GmbH Sohnstr. 65 40237 Düsseldorf Germany