某高硫铝土矿选择性溶出氧化铝试验研究  

Selective Dissolution of Al2O3 From a High Sulphur Bauxite

作　　者：刘洪波 刘安荣[1] 彭伟 王振杰[1] LIU Hongbo;LIU Anrong;PENG Wei;WANG Zhenjie(Guizhou Institute of Metallurgical and Chemical Engineering,Guiyang 550002,China)

机构地区：[1]贵州省冶金化工研究所

出　　处：《湿法冶金》2020年第1期7-11,共5页Hydrometallurgy of China

基　　金：贵州省科学技术基础研究基金资助项目(黔科合基础[2017]1175)

摘　　要：研究从贵州某高硫铝土矿中溶出氧化铝,通过正交试验确定了氧化铝溶出的影响因素及优化条件。结果表明:各因素对Al2O3和S溶出率的影响顺序为溶出温度>苛性碱质量浓度>石灰添加量>溶出时间;在溶出温度250℃、苛性碱质量浓度254.9g/L、石灰添加量8%、溶出时间60min优化条件下,氧化铝溶出率在95%以上,硫溶出率在24%以下,氧化铝的选择性溶出效果较好。The selective dissolution of A2O3 from a high sulphur bauxite from Guizhou was studied.The effects of some factors on leaching of A2O3 were determined by orthogonal test.The leaching process was optimized by single factor tests.The test results show that the influencing order on leaching of Al2O3 and S was temperature>caustic soda mass concentration>lime dosage>time.Under the optimum leaching conditions of temperature of 250℃,caustic soda mass concentration of 254.9 g/L,lime dosage of 8%and time of 60 min,the leaching of alumina is above 95%,and the leaching of sulfur is below 24%.The selective dissolution effect is good.

关 键 词：高硫铝土矿 正交试验 氧化铝 选择性溶出 

分 类 号：TF821[冶金工程—有色金属冶金] TF803.21