TY - JOUR
T1 - A Numerical Study of the Thermochemical and Aerodynamic States of H2-intensive Direct Reduction Shaft Furnace
AU - Zhai, Yandong
AU - Shao, Lei
AU - Zhao, Chenxi
AU - Zhang, Xinya
AU - Saxén, Henrik
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024
Y1 - 2024
N2 - In the urgent pursuit of deep decarbonization, the steel industry has paid significant attention to the hydrogen-intensive direct reduction process, where the H2-to-CO (volume) ratio of feed gas for the shaft furnace (SF) is increased compared to the current level. In this work, the reduction process of iron oxide pellets in the SF is investigated numerically to clarify how the in-furnace thermochemical and aerodynamic states are affected by increasing hydrogen content, with the goal to provide guidelines for more efficient operations of the unit. Multiscale modeling is conducted to investigate the complicated gas–solid countercurrent reactive flows in the SF where the reduction behavior of an individual iron oxide pellet is described using a three-interface unreacted shrinking core model. The results show that an increase in the hydrogen content leads to a lower temperature level and hence a deteriorated thermochemical state. It also induces a lower gas pressure drop over the in-furnace packed bed.
AB - In the urgent pursuit of deep decarbonization, the steel industry has paid significant attention to the hydrogen-intensive direct reduction process, where the H2-to-CO (volume) ratio of feed gas for the shaft furnace (SF) is increased compared to the current level. In this work, the reduction process of iron oxide pellets in the SF is investigated numerically to clarify how the in-furnace thermochemical and aerodynamic states are affected by increasing hydrogen content, with the goal to provide guidelines for more efficient operations of the unit. Multiscale modeling is conducted to investigate the complicated gas–solid countercurrent reactive flows in the SF where the reduction behavior of an individual iron oxide pellet is described using a three-interface unreacted shrinking core model. The results show that an increase in the hydrogen content leads to a lower temperature level and hence a deteriorated thermochemical state. It also induces a lower gas pressure drop over the in-furnace packed bed.
KW - aerodynamic condition
KW - direct reduced iron
KW - hydrogen-intensive shaft furnace
KW - multiscale modeling
KW - sustainable ironmaking
KW - thermochemical state
UR - http://www.scopus.com/inward/record.url?scp=85208967766&partnerID=8YFLogxK
U2 - 10.1002/srin.202400567
DO - 10.1002/srin.202400567
M3 - Article
AN - SCOPUS:85208967766
SN - 1611-3683
JO - Steel Research International
JF - Steel Research International
ER -