Journal
JOM
Volume 70, Issue 6, Pages 969-976Publisher
SPRINGER
DOI: 10.1007/s11837-018-2814-3
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-
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Funding
- National Nature Science Foundation of China [51474024, 51734003, 51334001, 51574021, 51604022]
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In this study, the recent innovations and improvements in carbon dioxide (CO2) injection technologies for electric arc furnace (EAF)-ladle furnace (LF) steelmaking processes have been reviewed. The utilization of CO2 in the EAF-LF steelmaking process resulted in improved efficiency, purity and environmental impact. For example, coherent jets with CO2 and O-2 mixed injection can reduce the amount of iron loss and dust generation, and submerged O-2 and powder injection with CO2 in an EAF can increase the production efficiency and improve the dephosphorization and denitrification characteristics. Additionally, bottom-blowing CO2 in an EAF can strengthen molten bath stirring and improve nitrogen removal, while bottom-blowing CO2 in a LF can increase the rate of desulfurization and improve the removal of inclusions. Based on these innovations, a prospective process for the cyclic utilization of CO2 in the EAF-LF steelmaking process is introduced that is effective in mitigating greenhouse gas emissions from the steelmaking shop.
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