Abstract
Electroreduction of Fe2O3to Fe in sodium hydroxide solutions has been investigated. It is found that pure iron powder with uniform crystal particles can be obtained by electrolysis of Fe2O3in alkaline solution. The porosity of the iron oxide (Fe2O3) pellet and the concentration of NaOH solution have significant influences on the electrolysis process. The deoxidation rate increases with increasing the concentration of NaOH solution, the grain size of iron products decreases with increasing the concentration of NaOH. The optimum NaOH concentration and pressure load used to fabricate Fe2O3pellet are 60 wt% and 6 MPa, respectively. X-ray powder diffraction (XRD) analysis indicates that Fe3O4was produced as the intermediate product during the electroreduction process.
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