盐酸浸出拜耳法赤泥预富集钪的研究  

Study of Scandium Pre-enrichment from Red Mud Leached by Hydrochloric Acid

作　　者：徐璐[1] 史光大[1] 李元坤[1] 钟庆文[1] 罗宇智[1] 余平[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,中国地质调查局金属矿产资源综合利用技术研究中心,成都610041

出　　处：《有色金属（冶炼部分）》2015年第1期54-56,共3页Nonferrous Metals（Extractive Metallurgy)

基　　金：国土资源部地质大调查项目(1212011120320)

摘　　要：考察盐酸浓度、浸出时间和液固比对拜耳法赤泥中钪浸出率的影响。结果表明,在下述最佳条件下钪浸出率达到96.63%:盐酸浓度7mol/L、80℃浸出90min、液固比8∶1。用P204进行一次萃取,钪萃取率达到97.99%。富钪有机相通过酸洗除杂、烧碱反萃、过滤、烘干后,固体中钪的质量百分数为2.09%,富集了328倍,总回收率97%以上。The effects of concentration of hydrochloric acid,leaching time and ratio of liquid to solid（L/S）on leaching rate of scandium from red mud of Bayer process were investigated.The results show that leaching rate of scandium is 96.63% under the optimum conditions including hydrochloric acid concentration of 7mol/L,temperature of 80 ℃,leaching time of 90 min,and L/S=8.0.The extraction rate of scandium reaches 97.99% with P204 as extracting agent.Scandium-rich organic phase is cleaned by acid solution,neutralized with NaOH solution and then filtrated and dried.The mass fraction of scandium in solid is 2.09% with total scandium recovery efficiency of 97% above and enriched time of 328 compared with that in red mud.

关 键 词：拜耳法 赤泥 钪 浸出 预富集 

分 类 号：TF845.1[冶金工程—有色金属冶金]