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首页> 外文期刊>International Journal of Electrochemical Science >Study on the Direct Electrochemical Reduction of Fe2O3 in NaCl-CaCl2 Melt
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Study on the Direct Electrochemical Reduction of Fe2O3 in NaCl-CaCl2 Melt

机译：NaCl-CaCl 2 熔体中Fe 2 O 3 的直接电化学还原研究

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The electrochemical reduction kinetics of Fe 2 O 3 in melts were investigated by cyclic voltammetry,square wave voltammetry, open circuit potential and i-t curve analyses at 800°C utilizing a Fe 2 O 3cathode filled in a metal pore molybdenum strip and a graphite rod anode. The composition andmorphology of the product obtained by different cell voltage electrolysis were analyzed by XRDand SEM. The reduction mechanism of solid Fe 2 O 3 was a three-step electronic process, and twoelectrons were transferred each time to reduce it to metal iron (Fe 2 O 3 →Fe 3 O 4 →FeO→Fe). Amongthem, Fe 3 O 4 and Fe x O were produced in the process. In addition, an electrolysis voltage of 1.2~3.0V was selected for constant potential electrolysis to determine the high current efficiency and lowenergy consumption. Finally, when an electrolysis voltage of 1.2V was applied, metallized iron witha particle size of 5 μm was obtained, and the current efficiency was 95.3%. The energyconsumption was 3.35 kWh/kg. These studies provide a reasonable potential range processparameter for the green preparation of metallic iron by molten salt electrolysis.
机译：通过循环伏安法，方波伏安法，开路电势研究了熔体中Fe 2 O 3的电化学还原动力学，并利用填充在金属孔钼条中的Fe 2 O 3阴极和石墨棒阳极在800°C下进行了曲线分析。 。用XRD和SEM分析了不同电解槽电压电解得到的产物的组成和形貌。固体Fe 2 O 3的还原机理是三步电子过程，每次转移两个电子以将其还原为金属铁（Fe 2 O 3→Fe 3 O 4→FeO→Fe）。其中，在该过程中产生了Fe 3 O 4和Fe xO。另外，选择1.2〜3.0V的电解电压进行恒电位电解，以确定高电流效率和低能耗。最后，当施加1.2V的电解电压时，获得粒径为5μm的金属化铁，电流效率为95.3％。能耗为3.35 kWh / kg。这些研究为通过熔融盐电解绿色制备金属铁提供了合理的电位范围工艺参数。

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