在可控氧流冶金理念指导下发展了熔渣无污染短路电化学还原新方法.分析了以氧离子导体作隔离膜时从氧化物熔渣中直接提取金属的电化学还原原理.利用电池等效电路,比较了熔渣在短路、开路条件下电化学还原时氧电流的特点,讨论了熔渣还原时影响氧电流的因素.结果表明:外电路短路、降低电路中总电阻、选用更强的还原剂或采用阴极合金化等措施可以增大氧离子电流,提高熔渣电化学还原速度.实验利用碳饱和铁液作还原剂,组成如下两种电池:石墨棒|[O]Fe+C饱和| ZrO2(MgO)| FeO(slag)|铁棒;石墨棒|[O]Fe+C饱和| ZrO2(MgO)|FeO(slag)+Cu(l)| |钼丝,从CaO-SiO2-Al2O3-FeO系熔渣中分别得到了纯铁和无碳铁合金.
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