以氧化镁为原料生产铝镁合金的研究  

Preparation of Aluminum-Magnesium Alloys from Magnesium Oxide

作　　者：杨少华[1] 班允刚[1] 郭玉华[1] 邱竹贤[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第6期839-842,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50334030)

摘　　要：以氧化镁为原料,以熔盐电解法制备了Al-Mg合金.实验过程中Al液为阴极,石墨为阳极,产生出CO2和CO,而不是传统镁电解生产中放出的大量有毒有害物质.研究表明,随着电解时间的延长,Mg在Al中的含量可以逐渐增大,可以达到1%～5%（质量分数）,添加KCl可以使MgO在电解质中的溶解度提高30%以上.CaF2可以降低电解质的初晶温度,但同时又增加了电解质的黏度.电流效率在前45 min之内最高可达74.5%,然后随着电解时间的延长下降,甚至在2 h降到40%.Aluminum-magnesium alloys were prepared through molten salt electrolysis from magnesium oxide. In the test, the liquid Al was taken as cathode with graphite as anode to produce CO and CO2 instead of a big amount of toxic or harmful gases released from conventional magnesium electrolysis. It was revealed that the content of Mg in Al increases gradually and up to 1%～5wt% with lengthening electrolyzing time, and the solubility of MgO can be improved by over 30% if 10 wt% KCl is added into electrolyte. CaF2 can lower the initial crystallization temperature of electrolyte, while the viscosity of electrolyte can be increased. The maximum current efficiency comes up to 74.5 % within the first 45 min, then it decreases sharply, even below 40 % after 2 hours.

关 键 词：氧化镁 铝镁合金 熔盐 电解 制备 

分 类 号：TF821[冶金工程—有色金属冶金]