TY - JOUR
T1 - Development of a novel process for energy and materials recovery in steelmaking slags
AU - Li, Juncheng
AU - Bhattacharjee, Debashish
AU - Hu, Xiaojun
AU - Zhang, Dianwei
AU - Sridhar, Seetharaman
AU - Li, Zushu
N1 - Publisher Copyright:
© 2017 Institute of Materials, Minerals and Mining and The AusIMM Published by Taylor & Francis on behalf of the Institute and The AusIMM.
PY - 2017/4/3
Y1 - 2017/4/3
N2 - This work aims at gathering fundamental knowledge for the development of a novel process for energy (H2 gas) and materials (magnetite Fe3O4) recovery in hot-steelmaking slags by reacting molten steelmaking slag with steam. Thermodynamic simulation was carried out to calculate the accumulated amount of produced H2 gas as a function of the volume of H2O–Ar gas introduced and the precipitated phases of the molten slags during controlled cooling. Laboratory experiments of crystallization behaviours of molten slags during cooling were visualized in situ through a confocal laser scanning microscope, and the cooled slags obtained were characterized by using SEM-EDS and XRD. CCT diagrams for different slags were created showing the slag crystallization/phase transformation at different cooling rates. The recovery ratio of H2 gas and the maximum potential recovery ratio of iron oxide in the oxidized slags were calculated, which concludes that with increasing the slag basicity from 1.0 to 1.5 and 2.0, the recovery ratio of H2 was found to increase from 12.6 to 23.7% and 22.6%, and the maximum potential recovery ratio of iron oxide was found to increase from 18.3 to 34.4% and 32.8% under the investigated conditions.
AB - This work aims at gathering fundamental knowledge for the development of a novel process for energy (H2 gas) and materials (magnetite Fe3O4) recovery in hot-steelmaking slags by reacting molten steelmaking slag with steam. Thermodynamic simulation was carried out to calculate the accumulated amount of produced H2 gas as a function of the volume of H2O–Ar gas introduced and the precipitated phases of the molten slags during controlled cooling. Laboratory experiments of crystallization behaviours of molten slags during cooling were visualized in situ through a confocal laser scanning microscope, and the cooled slags obtained were characterized by using SEM-EDS and XRD. CCT diagrams for different slags were created showing the slag crystallization/phase transformation at different cooling rates. The recovery ratio of H2 gas and the maximum potential recovery ratio of iron oxide in the oxidized slags were calculated, which concludes that with increasing the slag basicity from 1.0 to 1.5 and 2.0, the recovery ratio of H2 was found to increase from 12.6 to 23.7% and 22.6%, and the maximum potential recovery ratio of iron oxide was found to increase from 18.3 to 34.4% and 32.8% under the investigated conditions.
KW - CCT diagram
KW - H gas
KW - Steelmaking slag
KW - recovery
KW - spinel
UR - http://www.scopus.com/inward/record.url?scp=85010002232&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85010002232&partnerID=8YFLogxK
U2 - 10.1080/03719553.2016.1259871
DO - 10.1080/03719553.2016.1259871
M3 - Article
AN - SCOPUS:85010002232
SN - 0371-9553
VL - 126
SP - 94
EP - 105
JO - Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy
JF - Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy
IS - 1-2
ER -