TY - GEN
T1 - New EAF dust treatment process for co-production of metallic zinc and calcium-ferrite
AU - Koide, Shunsuke
AU - Mizuno, Hitoshi
AU - Yamaguchi, Kazuyoshi
AU - Tanno, Fumio
AU - Nagasaka, Tetsuya
N1 - Funding Information:
The authors wish to thank Mr. Tsuyoshi Kanamori and Mr. Daigo Kubota, former graduate students of the Department of Materials Science and Engineering, School of Engineering, Tohoku University, now JX Nippon Mining and Metals Corp. and Mitsubishi Materials Corp., for their experimental assistance. This work was supported by the Japan Science and Technology Agency (JST) by NexTEP Project in 2014 to 2019, ISIJ Innovative Program for Advanced Technology, and ISIJ Research Promotion Grant, The Iron and Steel Institute of Japan (ISIJ). Helpful comments, discussions and encouragements given by EAF Division of ISIJ and Mrs. Shiobhan Nishimura, Research Associate of MD and GP-Spin Program, Tohoku University, are also gratefully acknowledged.
Publisher Copyright:
© 2020 by the Association for Iron & Steel Technology.
PY - 2020
Y1 - 2020
N2 - In the EAF steelmaking industry, dust treatment is one of the most serious issues worldwide due to its high costs and environmental burden, and thus this critical problem must be solved for sustainability of steel industry. A bench-scale investigation has been conducted in which CaO and coal-added EAF dust was heated at around 1,000°C to convert ZnFe2O4 into ZnO and Ca2Fe2O5, and formed ZnO was reduced. Evaporated zinc was collected as crude ZnO and after the halogens removal process, ZnO was supplied to carbothermic reduction process under reduced pressure. Finally, high-purity metallic zinc was successfully recovered.
AB - In the EAF steelmaking industry, dust treatment is one of the most serious issues worldwide due to its high costs and environmental burden, and thus this critical problem must be solved for sustainability of steel industry. A bench-scale investigation has been conducted in which CaO and coal-added EAF dust was heated at around 1,000°C to convert ZnFe2O4 into ZnO and Ca2Fe2O5, and formed ZnO was reduced. Evaporated zinc was collected as crude ZnO and after the halogens removal process, ZnO was supplied to carbothermic reduction process under reduced pressure. Finally, high-purity metallic zinc was successfully recovered.
KW - Calcium ferrite
KW - EAF dust
KW - Electric arc furnace
KW - Steel scrap
KW - Zinc
KW - Zinc ferrite
UR - http://www.scopus.com/inward/record.url?scp=85092274594&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85092274594&partnerID=8YFLogxK
U2 - 10.33313/380/009
DO - 10.33313/380/009
M3 - Conference contribution
AN - SCOPUS:85092274594
T3 - AISTech - Iron and Steel Technology Conference Proceedings
SP - 61
EP - 70
BT - Proceedings of the Iron and Steel Technology Conference, AISTech 2020
PB - Iron and Steel Society
T2 - AISTech 2020 Iron and Steel Technology Conference
Y2 - 31 August 2020 through 3 September 2020
ER -