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| Transformation and separation of metallic iron in reduced ilmenite during corrosion process |
| Fu‑qiang Zheng 1, Xia Liu2, Yu‑feng Guo 1, Shuai Wang 1, Feng Chen 1, Ling‑zhi Yang 1, Tao Jiang 1, Guan‑zhou Qiu 1 |
| 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China; 2 Hunan Qingzhiyuan Environmental Protection Technology Co., Ltd., Changsha 410083, Hunan, China |
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Abstract The effects of corrosion temperature, oxygen flow rate and corrosion time on the transformation of metallic iron were systematically studied, and the effects of mineral phases of Fe-bearing products on Ti–Fe separation were investigated. The reaction mechanism of metallic iron in corrosion process was proposed. The results showed that corrosion temperature played a key role in determining the transformation of metallic iron in reduced ilmenite during corrosion process. Under suitable corrosion conditions, Fe-bearing mineral in reduced ilmenite could be converted to amorphous ferric hydroxide, lepidocrocite, hematite and magnetite, respectively, and lepidocrocite was the most easily separated Fe-bearing mineral from corrosion products owing to the significant density difference between lepidocrocite and Ti-rich materials. The Ti-rich material with 77.81 wt.% TiO2 and Fe-bearing product with 52.69 wt.% total Fe were obtained by gravity separation. The Ti recovery ratio and Fe recovery ratio were 91.16% and 86.27%, respectively.
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| Cite this article: |
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Fu‑qiang Zheng,Xia Liu,Yu‑feng Guo, et al. Transformation and separation of metallic iron in reduced ilmenite during corrosion process[J]. Journal of Iron and Steel Research International, 2020, 27(12): 1372-1381.
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2020, Vol. 27 
