利用海南高岭土制备氧化铝条件的研究  

Preparing of Alumina Powder from Hainan Kaolin

作　　者：徐树英[1] 张永明[1] 潘莉莎[1] 

机构地区：[1]海南大学材料与化工学院,海南海口570203

出　　处：《化学工业与工程》2010年第3期224-228,共5页Chemical Industry and Engineering

基　　金：海南省自然科学基金资助(808101)

摘　　要：采用海南高岭土为原料制备纳米氧化铝成本低,可以提高海南高岭土的产品附加值,对海南经济发展具有重要意义。本研究采用正交试验方法,研究了盐酸质量浓度、酸浸温度及干凝胶煅烧温度对纳米氧化铝的提取率和结晶度的影响。结果表明干凝胶煅烧温度对氧化铝的提取率和结晶度影响最显著。为了提高氧化铝的提取率和结晶度,优化配比方案为:酸浸温度95℃左右,盐酸质量浓度为333mg/L,煅烧温度为950℃。Using Hainan kaolin as raw material to prepare alumina powder can reduce the cost,improve the kaolin＇s additional value,and have significance role to Hainan economic development. Orthogonal experiment was carried out to study the influence of concentration of HCl,the temperature of acid and drygelatin calcining temperature on the leaching rate of alumina and the crystallinity. The experimental results show that dry-gelatin calcining temperature has the greatest influence. The optimization of the leac- hing yield of alumina and crystallinity can be achieved when the temperature of acid at 95 ℃ ,reacted within HCl of 333 mg /L,and dry-gelatin calcining temperature of 950 ℃ .

关 键 词：海南高岭土 氧化铝 结晶度 正交试验 

分 类 号：TQ174[化学工程—陶瓷工业]