摘要
采用单因素法,借助XRD、SEM和EDS以及金属铝直收率与物料质量损失率等手段与方法,分别添加Fe2O3、SiO2与TiO2（均为分析纯）,研究铁、硅和钛氧化物对氧化铝碳热还原？氯化法炼铝过程的影响。结果表明：在40～100Pa、1723～1733K添加7.5%～10.0%Fe2O3（质量分数）时,金属铝的直收率达55.24%～60.60%（质量分数）;而在40～100Pa、1763～1783K添加2.5%～15.0%SiO2（质量分数）时,金属铝的直收率达20.12%～28.03%,低于未添加SiO2时的金属铝的直收率;在40～100Pa、1763～1783K添加10.0%TiO2（质量分数）时,金属铝的直收率达73.64%,其平均纯度达95.82%。在上述实验条件下,添加Fe2O3和TiO2有利于氧化铝的碳热还原及碳热？氯化过程的进行,而添加SiO2不利于该法炼铝过程的进行。
To investigate the effects of Fe2O3,SiO2 and TiO2（analytically pure） on the process of aluminum produced by alumina carbothermic reduction-chlorination in vacuum,the methods of single factor method,XRD,SEM,EDS,the recovery rate of Al and reactant mass loss rate were used.The results show that by the addition of 7.5%-10.0% Fe2O3（mass fraction） under 40-100 Pa and 1 723-1 733 K,the recovery rate of Al reaches 55.24%-60.60%（mass fraction）.By the addition of 2.5%-15.0% SiO2 under 40-100 Pa and 1 763-1 783 K,the recovery rate of Al reaches 20.12%-28.03%,which is lower than that without SiO2.By the addition of 10.0% TiO2 under 40-100 Pa and 1 763-1 783 K,the recovery rate of Al reaches 73.64% with the average purity of Al of 95.82%.In a word,addition of Fe2O3 or TiO2 is beneficial to the processes of alumina carbothermic reduction and carbothermic-chlorination,but addition of SiO2 is not beneficial to this aluminum production.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第9期1836-1842,共7页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金-云南联合基金重点资助项目(u0837604)
高等学校博士学科点专项科研基金资助项目(20095314110003)
关键词
氧化铝
碳热还原
氯化
铝冶金
alumina
carbothermic reduction
chlorination
aluminum metallurgy
