| 熔盐电解法制备铝镁合金过程电流效率和反电动势研究 |
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| 引用本文： | 张保国,李继东,王一雍,张明杰.熔盐电解法制备铝镁合金过程电流效率和反电动势研究[J].有色金属(冶炼部分),2015(3):57-61. |
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| 作者姓名： | 张保国 李继东 王一雍 张明杰 |
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| 作者单位： | 辽宁科技大学,辽宁科技大学,辽宁科技大学,东北大学材料与冶金学院 |
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| 基金项目： | 国家自然科学基金资助项目(51204094)；鞍山市科技项目（2012MS02） |
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| 摘 要： | 以氧化镁为原料,在MgF2-LiF-KCl电解质体系中采用熔盐电解制备铝镁合金,考查电解时间、电流强度对电流效率以及合金中镁含量的影响,并采用连续脉冲—计算机法测量电解过程反电动势的变化。结果表明,电流效率随电流密度和电解时间的增加先增大后减小;镁含量随电流强度的增加先增大后减小,随电解时间逐渐增大。在3A的电流强度下电解2h的电流效率达87%,加料前后平均反电动势降低0.5V,氧化镁(1%)的加料周期约45min。铝镁合金中镁浓度分布比较均匀,无明显偏析现象。
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| 关 键 词： | 铝镁合金 熔盐电解 反电动势 电流效率 |
| 收稿时间： | 2014/10/19 0:00:00 |
| 修稿时间： | 2014/10/21 0:00:00 |
Study on Current Efficiency and Back EMF during Preparation of Al-Mg Alloy by Molten Salt Electrolysis |
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| zhangbaoguo,lijidong,WANG Yi-yong and ZHANG Ming-jie.Study on Current Efficiency and Back EMF during Preparation of Al-Mg Alloy by Molten Salt Electrolysis[J].Nonferrous Metals(Extractive Metallurgy),2015(3):57-61. |
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| Authors: | zhangbaoguo lijidong WANG Yi-yong and ZHANG Ming-jie |
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| Affiliation: | University of Science and Technology Liaoning |
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| Abstract: | Al-Mg alloy was prepared in MgF2-LiF-KCl electrolyte system by molten salt electrolysis with MgO as raw material. The effects of electrolysis duration and current intensity on current efficiency and magnesium content were investigated. Back EMF was measured by continuous pulse computer method. The results show that current efficiency rises first and then drops with increasing of current intensity and electrolysis duration. Magnesium content in alloy rises first and then drops with increasing of current intensity while rises with electrolysis duration. Current efficiency is 87% under electrolysis at I=3 A for 2 h. Back EMF decreases 0.5 V after feeding for 45 min. Magnesium is distributed evenly in Al-Mg alloy with no obvious segregation. |
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| Keywords: | Al-Mg alloy molten salt electrolysis back EMF current efficiency |
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