1. Faculty of Engineering and Natural SciencesTampere University P.O. Box 541 FI‐33101 Tampere Finland
2. National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental TechnologySchool of Material Science and EngineeringShanxi University of Technology Hanzhong 723001 P. R. China
3. École de Technologie SupérieureDepartment of Electrical Engineering 1100 rue Notre‐Dame Ouest Montréal QC H3C 1K3 Canada