摘要
利用低价氟化铝歧化反应,用碳作还原剂,在真空条件下,从氧化铝中提取铝进行了实验研究。实验结果表明:不同粘接指数的煤混合物作为还原剂可以防止喷料;同时得到较优的实验参数:冰晶石与氧化铝的质量比为5∶1,氧化铝的还原率达到80%以上;固定碳过量3.02倍时,还原率将近80%;温度在1400℃时金属铝纯度达92.54%。为下一步从低品位含氧化铝原料中直接提取金属铝提供依据。
A novel technique has been successfully developed to extract aluminum,in vacuum,from alumina through disproportionation of aluminum subflorides with carbon as the reducing agent.In the technique,formation of the meta-stable aluminum subflorides,at high temperature,is followed by decomposition into aluminum and alumina.The preliminary results show that the new technique is feasible under optimized conditions.Interesting finding is that if a mixture of coal with different adhesions is used as reducing agent,s...
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2008年第2期182-184,共3页
Chinese Journal of Vacuum Science and Technology
基金
973计划前期研究专项(No.2007CB616908)
云南省自然科学基金资助项目(No.2002E0012R)
关键词
铝
真空冶金
低价氟化物
歧化
Aluminum
Vacuum metallurgy
Sub-fluoride
Disproportion