拜耳法赤泥酸浸液脱硅试验研究

研究了拜耳法赤泥盐酸浸出液的脱硅。在高酸度下进行硅酸凝聚、晶种絮凝脱硅试验,考察了温度、晶种添加量和时间对脱硅率的影响,并考察了脱硅温度和时间对浸出液酸度的影响。试验结果表明:影响脱硅的因素依次是脱硅温度、脱硅时间和晶种添加量;在脱硅温度80℃、晶种添加量1%、脱硅时间7h条件下,脱硅率达94.12%;脱硅温度高于70℃,脱硅时间大于5h,浸出液挥发较大。

Study on Desilication From Acid Leaching Liquid of Bayer Process Red Mud

Desilication from red mud acid leaching liquid of Bayer process was studied under high acidity condition.By the experiments of silicic acid coacervation and seed crystal flocculation,the influences of temperature,seed additive amount and time on desilication were examined,and the influences of desilication temperature and time on acidity of acidic leaching solution were studied.The experimental results showed that influencing factors of desilication process was ordinal temperature,time and seed additive amo...