电转化和氢氧化钠滴定法从氯化铝溶液中制备氧化铝及其性能对比研究  

A comparative study of alumina prepared from aluminum chloride solution by electrotransformation method and by sodium hydroxide titration method

作　　者：韩秀秀 张廷安[1] 吕国志[1] 潘喜娟 HAN Xiuxiu;ZHANG Tingan;LYU Guozhi;PAN Xijuan(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education),Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室

出　　处：《有色金属科学与工程》2019年第4期16-21,共6页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目（U1710257）

摘　　要：目前,我国存在许多以氯化铝溶液为原料制备氧化铝的方法.然而,这些方法均存在着许多不足之处,如产生废酸和废盐、制备条件要求较高、反应中涉及有毒有害物质等.基于这种情况,在氯碱工业的启发下,东北大学已经提出了一种电转化AlCl3水溶液制备氧化铝的新方法.并且该方法已经得到了试验性验证.文中主要研究了电转化新方法和氢氧化钠滴定法制备的氧化铝前驱体在红外光谱及粒度分布方面的不同;同时研究了这2种方法制备的氧化铝在物相、形貌及粒度等方面的差异.结果表明,这2种方法制备的氧化铝前躯体均含有铝元素及Al-OH键,且其焙烧产物也均为氧化铝.与氢氧化钠滴定法制备的氧化铝相比,电转化法制备的氧化铝形貌较规整且为片状结构,而氢氧化钠滴定法制备的氧化铝形状不规则.同时,电转化法制备的氧化铝及其前驱体的粒径小于氢氧化钠滴定法制备的氧化铝及其前躯体的粒径,但前者的粒径分布比后者的粒径分布更为均匀.At present,there are many methods for preparing alumina from aluminum chloride solution in our country.However,these methods have some shortcomings,such as producing waste acid and salt,requiring demanding preparation conditions,producing toxic and harmful substances in the reaction,and so on.In this case,inspired by the chlorine-alkali industry,Northeastern University has proposed a new method for the preparation of alumina by electrochemical conversion of AlCl3 aqueous solution.And the method has been verified experimentally.This paper investigates the differences in infrared spectrum and particle size distribution of alumina precursor prepared by electrochemical transformation and the one prepared by sodium hydroxide titration.At the same time,this paper also studies the differences in phase,morphology and particle size between the two kinds of alumina precursors.The results show that the alumina precursors prepared by the two methods contained Al element and Al-OH bond,and the precursors'roasted products are all alumina.In addition,compared with alumina prepared by sodium hydroxide titration,the morphology of alumina prepared by electrochemical transformation is more regular and flake-like,while the shape of alumina prepared by sodium hydroxide titration is irregular.Meanwhile,alumina and its precursor prepared by electrochemical transformation have smaller particle size and more regular particle size distribution than those prepared by sodium hydroxide titration.

关 键 词：氧化铝 氯化铝溶液 电转化法 氢氧化钠滴定法 

分 类 号：TF821[冶金工程—有色金属冶金]