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| Study on Current Efficiency and Back EMF during Preparation of Al-Mg Alloy by Molten Salt Electrolysis |
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Received:October 19, 2014
Revised:October 21, 2014
Accepted:October 22, 2014
Published Online:February 15, 2015
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| DOI：10.3969/j.issn.1007-7545.2015.03.016 |
| KeyWord:Al-Mg alloy; molten salt electrolysis; back EMF; current efficiency |
| Author | Institution |
| zhangbaoguo |
辽宁科技大学 |
| lijidong |
辽宁科技大学 |
| WANG Yi-yong |
辽宁科技大学 |
| ZHANG Ming-jie |
东北大学材料与冶金学院 |
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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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