The reaction behaviour of partially reduced iron (PRI) was studied to understand the effect of PRI utilisation in the blast furnace process. For quantitative analysis, the reaction behaviour of PRI under typical operating conditions of a blast furnace was measured using the thermogravimetric method along with the reduction behaviour of hematite and sinter. Experimental results indicated that the reoxidation behaviour of the PRI under the conditions of the upper shaft of the blast furnace retarded the indirect reduction rate in the lower shaft. The rate constants derived from the grain model, experimental results of scanning electron microscopy, and porosimetry analysis indicated that the phenomenon of reduction retardation of PRI under the conditions of the lower shaft originated owing to the reoxidation of PRI, resulting in the blockage of pores. The reaction behaviour considering the reaction characteristics of PRI was derived under conventional blast furnace conditions.
|Publication status||Published - 2021 May|
Bibliographical noteFunding Information:
Acknowledgments: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20172010106300), the Korea Initiative for fostering the University of Research and Innovation (KIURI) Program of National Research Foundation (NRF) funded by the Korean government (MSIT) (No. NRF-2020M3H1A1077207), and the Brain Korea 21 FOUR Project in 2021 (BK21).
© 2021 by the authors.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Metals and Alloys