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Bi S.S.,Guizhou University | Bi S.S.,Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy | Huang R.,Guizhou University | Huang R.,Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy | And 6 more authors.
Advances in Energy Science and Equipment Engineering - Proceedings of International Conference on Energy Equipment Science and Engineering, ICEESE 2015 | Year: 2015

Gas based reduction of oolitic hematite was researched with different reduction times. Ore microscopy, phase change and metallization rate of oolitic hematite under different reduction times were characterized by optical microscope, XRD and chemical analysis, respectively. It is shown that the metallization rate increased with the increase of the reduction time; the metallization rate increased fast in the early stage, and then became slow. The metallization rate can reach 80.75% when the temperature was 1000°C, and the reduction time was 120 min. Oolitic hematite was reduced by H2, the reactions of which were from the external to the internal. Meanwhile, the new phases of FeAl2O4 and Fe2SiO4 block can be generated during the reduction process. © 2015 Taylor & Francis Group, London. Source


Run H.,Guizhou University | Run H.,Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy | Bi S.,Guizhou University | Bi S.,Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy | And 6 more authors.
Green Processing and Synthesis | Year: 2016

Oolitic hematite abounds in the Guizhou Province of China but is hard to use with the traditional process. The reduction of Guizhou oolitic hematite by H2 was studied. Ore microscopy, phase change, and the metallization rate of oolitic hematite under different reduction conditions were characterized by optical microscopy, X-ray diffraction, and chemical analysis, respectively. The metallization ratio of the reduced sample increased with the increase of reduction time. The metallization ratio reached 80.75% when the temperature was 1000°C and the reduction time was 120 min. The new phases of FeAl2O4 and Fe2SiO4 can be generated during the reduction process, which hindered the reduction of the oolitic hematite. © 2016 by De Gruyter. Source

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