Abstract
In this study, a novel method for simultaneously improving desulfurization of iron ore and lowering SO2 emission in flue gas at low temperature by microwave roasting of the ore with the addition of urea was proposed. The results showed that the desulfurization percentage of iron ore increased significantly with lower SO2 emission in flue gas when urea was added. By adding 1.5 wt% urea into iron ore and roasting the mixture at 250 ℃ for 60 min, the desulfurization percentage of roasted iron ore reached 67.37% and the SO2 emission in flue gas decreased by 74.68%. After leaching of the roasted ore with water at room temperature for 30 min, the residual sulfur content of the leaching product decreased to 0.21 wt%. This study provided a good example for efficient, low-cost, and environmentally friendly desulfurization of iron ore.
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References
Sun W, Wang Q, Zhou Y, Wu J (2020) Material and energy flows of the iron and steel industry: Status quo, challenges and perspectives. Appl Energ 268:114946
Qin H, Guo X, Yu D, Tian Q, Li D, Zhang L (2023) Pyrite as an efficient reductant for magnetization roasting and its efficacy in iron recovery from iron-bearing tailing. Sep Purif Technol 305:122511
Yuan S, Zhou W, Han Y, Li Y (2019) Selective enrichment of iron from fine-grained complex limonite using suspension magnetization roasting followed by magnetic separation. Sep Sci Technol 55:3427–3437
Ye L, Peng Z, Tian R, Tang H, Zhang J, Rao M, Li G (2022) A novel process for highly efficient separation of boron and iron from ludwigite ore based on low-temperature microwave roasting. Powder Technol 410:117848
Yu J, Sun H, Li P, Han W, Li Y, Han Y (2023) A pilot study on recovery of iron from sulfur-bearing hematite ore using hydrogen-based mineral phase transformation followed by magnetic separation. J Environ Chem Eng 11(5):110630
Chandra AP, Gerson AR (2009) A review of the fundamental studies of the copper activation mechanisms for selective flotation of the sulfide minerals, sphalerite and pyrite. Adv Colloid Interf Sci 145(1–2):97–110
Liang Z, Yi L, Huang Z, Lu B, Jiang X, Cai W, Tian B, Jin Y (2019) Insight of iron ore-coal composite reduction in a pilot scale rotary kiln: a post-mortem study. Powder Technol 356:691–701
Rezvanipour H, Mostafavi A, Ahmadi A, Karimimobarakabadi M, Khezri M (2018) Desulfurization of iron ores: processes and challenges. Steel Res Int 89:1700568
Martin SC, Larivière C (2014) Community health risk assessment of primary aluminum smelter emissions. J Occup Environ Med 56(5):33–39
Chen R, Huang W, Wong CM, Wang Z, Thach TQ, Chen BH, Kan H (2012) Short-term exposure to sulfur dioxide and daily mortality in 17 Chinese cities: the China air pollution and health effects study (CAPES). Environ Res 118:101–106
Abzalov VM, Sudai AV, Yur’ev BP (2008) Desulfurization in roasting iron-ore pellets. Steel Transl 38(12):1003–1007
Marland S, Merchant A, Rowson N (2001) Dielectric properties of coal. Fuel 80(13):1839–1849
Tao X, Tang L, Xie M, He H, Xu N, Feng L, Yang Y, Luo L (2016) Dielectric properties analysis of sulfur-containing models in coal and energy evaluation of their sulfur-containing bond dissociation in microwave field. Fuel 181:1027–1033
Wang S, Bi X, Weng D (2013) Study on a new technology of flue gas desulfurization in sintering process. Adv Mater Res 726:2284–2290
Ye L, Peng Z, Tian R, Tang H, Anzulevich A, Rao M, Li G (2023) Efficient pre-reduction of chromite ore with biochar under microwave irradiation. Sustain Mater Technol 37:e00644
Li J, Guang M, Lu Y (2023) Effect of composition on low-temperature soda roasting of boron-rich blast furnace slag. J Sustain Metall 9:1215–1225
Chun T, Long H, Di Z, Zhang X, Wu X, Qian L (2017) Novel technology of reducing SO2 emission in the iron ore sintering. Process Saf Environ 105:297–302
Zhang Y, Li Y, Guo H, Liu X, Cao J (2023) Experimental and calculated solubility isotherms of the quaternary NaBr–MgBr2–Na2SO4–MgSO4–H2O system and its ternary subsystem at 298.15 K. J Chem Thermodyn 183:107040
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This work was partially supported by the National Key Research and Development Program of China under Grant 2020YFC1909800 and the National Natural Science Foundation of China under Grant 72088101.
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Ye, L. et al. (2024). Upgrading Iron Ore by Microwave Desulfurization with Reduction of Harmful SO2 Emission. In: Peng, Z., et al. Characterization of Minerals, Metals, and Materials 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50304-7_7
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DOI: https://doi.org/10.1007/978-3-031-50304-7_7
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