广西高铁铝土矿拜耳法溶出试验研究  

Tests on the Bayer Dissolving Method for The High-iron Bauxite from Guangxi

作　　者：张永康[1,2] 胡四春[1,2] 张耀[1,2] 马化龙[1,2] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,郑州450006 [2]国家非金属矿产资源综合利用工程技术研究中心,郑州450006

出　　处：《矿产保护与利用》2013年第6期37-41,共5页Conservation and Utilization of Mineral Resources

基　　金：中国地质调查局地质调查工作项目(编号:12120113088300)支持

摘　　要：针对广西某地高铁一水硬铝石型铝土矿的矿物特性,采用拜耳法溶出工艺,对其进行了溶出试验研究。研究结果表明:最佳溶出条件为溶出温度270℃、溶出时间60 min、配料分子比1.45、石灰加入量7%、磨矿细度(-0.097 mm含量)为85%、循环母液苛性碱浓度230 g/L,在此条件下氧化铝的相对溶出率达到95.15%。Based on the characteristics of the high - iron diasporic bauxite from Guangxi, leaching alumina by Bayer process was carried out. The results showed that the optimum conditions were digestion temperature of 270℃, digestion time of 60 minutes, caustic ratio of 1.45, lime dosage of 7% to bauxite, grinding fineness of ore to -0. 097mm accounted for 85%, caustic alkali concentration of 230 g/L. Under the optimum conditions,the digestion rate of alumina was 95.15%.

关 键 词：高铁铝土矿 氧化铝 溶出率 

分 类 号：TF821[冶金工程—有色金属冶金]