广西某高硫高铁铝土矿拜耳法溶出试验研究  

Investigation on the Bayer Dissolving Method for High-sulfur and Iron Bauxite in Guangxi

作　　者：陈燕清 Chen Yanqing(Guangxi Geological Mineral Test Research Center, Nanning, Guangxi, China)

机构地区：[1]广西地质矿产测试研究中心,广西南宁530023

出　　处：《矿产综合利用》2019年第2期46-50,15,共6页Multipurpose Utilization of Mineral Resources

摘　　要：针对广西某地高硫高铁一水硬铝石型铝土矿的矿石特性,采用浮选脱硫-拜耳法溶出工艺流程,对其进行反浮选除硫再进行拜耳法溶出试验。结果表明,该高硫高铁铝土矿可通过浮选方法脱硫,脱硫尾矿进行拜耳法溶出可以得到较佳的溶出效果。其较佳的溶出条件为溶出温度260℃、溶出时间45 min、配料分子比1.4、石灰加入量10%、循环母液苛性碱浓度260 g/L,在此条件下氧化铝的相对溶出率达到99.40%。Based on the characteristics of the high-sulfur and iron diasporic bauxite in Guangxi, leaching alumina by Sulfur flotation and then Bayer process was carried out. The results showed that the high sulfur bauxite can be desulphurized by flotation method, and desulphurized alumina concentrate can be dissolved by Bayer dissolving method. The optimum conditions were digestion temperature of 260℃, digestion time of minutes 45 min, caustic ratio of 1.4,lime dosage of 10% to bauxite, caustic alkali concentration of 260 g/L.Under the optimum conditions, the digestion rate of alumina was 99.40%.

关 键 词：铝土矿 浮选 拜耳法 溶出率 

分 类 号：TD989[矿业工程—选矿] TF821[冶金工程—有色金属冶金]