Incomplete Reduction of Iron Ore in a Fluidized Bed Reactor

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Agha Ali, Mohammad Hadi | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44846 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Halali, Mohammad
Abstract:
The main goal of current investigation was partial reduction of Fe2O3 available in Hematite-rich ore to Magnetite by Fludization Bed method. The reductive gas, CO, was produced by incomplete combustion of Acetylene and Airmixed in inappropriate ratio. X-Ray Diffraction and X-Ray Florescence analyses were implemented in order to conducting qualitative analysis of present phases before and after reduction of the ore. Quantitative analysis of the same phases was also conducted by Titration. The latter analysis revealed the precise magnitude of available iron in each of the oxide containing phases. The chemical composition of the reactor gas was also determined before and after reduction process, by Gas Chromatography Analysis. The main variables of the experiment were temperature and initial size of the feeding ore particles. The maximum temperature chosen in this study was 430 ˚C. Eventually, partial reduction of Hematite to Magnetite was observed in all under study temperatures and particle sizes. The level of reduction increased with temperature; however, the inverse trend was observed with particle size
Keywords:
Hematite ; Magnetite ; Direct Reduction Process ; Fluidized Bed ; Incomplete Combustion ; Iron Oxide

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