摘要
提出了一种从氧化物熔渣中直接提取金属的电化学方法,即采用氧离子渗透膜原电池短路法,用碳作还原剂,在CaO SiO2 Al2O3 FeO熔渣中,利用阴极合金化原理,获得无碳铁合金。结果表明:在本实验条件下,熔渣中FeO浓度越高,外电路短路电流越大。发现熔渣的还原电流包括外电路短路电流和氧离子膜的内部短路电流,可利用外电路短路电流来监测熔渣的外电路还原率。
A carbon-free Cu-Fe alloy was obtained from molten CaO-SiO_2-Al_2O_3-FeO slags by means of cathode-alloying through oxygen-ion-permeable membrane galvanic short-circuit method. The galvanic cell employed in this experiment was as follows: graphite ｜_(Fe+Csaturation)｜ZrO_2(MgO)｜(FeO)_((slag))+Cu_((l))｜Mo. The experimental results show that under the same condition the external short-circuit current increases with increasing FeO concentration in CaO-SiO_2-Al_2O_3-FeO molten slags. It is found that the reduction current of molten slags consists of an external short-circuit current and an interior short-circuit current in oxygen-ion-permeable membrane. The real-time variation of external circuit reduction ratio of molten slags could be obtained from the curve of external circuit current versus time.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2005年第2期19-23,共5页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(50274008
50274012)
关键词
氧化物
原电池
熔渣
电化学还原
氧离子电流
oxide
galvanic cell
molten slags
electrochemical reduction
oxygen-ion current
