1. Faculty of EngineeringHokkaido University Hokkaido 060‐8628 Japan
2. School of Engineering, College of Sciences and EngineeringUniversity of Tasmania Hobart Tasmania 7001 Australia
3. CSIRO Minerals Resources Business UnitQueensland Centre for Advanced, Technologies Brisbane Queensland 4069 Australia
4. Department of Mineral Resources and Energy EngineeringChonbuk National, University Jeollabuk‐do 561‐756 South Korea