Research Team: A/Prof. Pramod Koshy, Dr. Xing Xing (School of Materials Science and Engineering), Dr. Sushil Gupta, Prof. Charles Sorrell, Dr. Hannah Lomas (University of Newcastle), Dr. Richard Roest (University of Newcastle), Dr. Harold Rogers (University of Newcastle), Dr. Michael Drew (ANSTO), Dr. Ray Longbottom (University of Wollongong), Prof. Paul Zulli (University of Wollongong), Mr. Kim Hockings (BHP), Mr. Stephen Brant (BHP), Mr. Nick Andriopoulos (Angloamerican), Mr. Jay Zheng (South32)
Industry Partner: ACARP
Timeframe: 2019 – 2021
Objectives
Outcomes
Objectives
- Compare the high-temperature (1100°-1550°C) and room temperature strengths for two individual cokes and their blended compositions fabricated using different methods (all from the pilot-oven)
- Gain understanding of the effects of mineralogical, microstructural, and fracture characteristics of the cokes at high temperatures with the evolution of strength after reactivity tests
- Develop the fundamental understanding of the key factors affecting carbon dissolution from coke into hot metal both by itself and in the presence of slag
- Develop comprehensive understanding of coke degradation mechanisms at high-temperatures (temperature, gasification, hot metal/slag reactions) for individual and blended cokes in order to correlate this behaviour to the constituent coal properties and blending configurations
Outcomes
- The study showed that the rank of the coals has an impact on its properties and performance under blast furnace conditions
- Presence of low rank coal components was found to have a major impact on weight losses on exposure to blast furnace conditions and on the porosity that would develop in these cokes after gasification
- High-temperature tests in the present work showed similar trends to those observed in previous ACARP projects in that the values were higher than those observed at room temperature and showed an increase with temperature to a specific value after which the strengths decreased with further increase in temperature
- Immersion testing method is highly suitable for developing reaction interfaces between the cokes and the coke metal and also for recovering the majority of the coke sample after reaction for further analysis