盐酸浸出氧化铝赤泥回收镓  

Gallium Recovery from Alumina Red Mud with Hydrochloric Acid Leaching

作　　者：王克勤[1] 李生虎[1] 朱国海[1] 宋嘉伟[1] 高燕[1] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024

出　　处：《有色金属（冶炼部分）》2012年第8期34-36,共3页Nonferrous Metals（Extractive Metallurgy)

摘　　要：研究了拜耳法赤泥盐酸浸出镓的过程。采用正交试验考察浸出温度、时间、液固比和酸度对镓浸出率的影响。结果表明,在最佳浸出条件下:8mol/L盐酸、液固比4.0、109℃浸出5h,镓浸出率达到95.4%。用50%TBP+50%煤油一次萃取,镓萃取率达到98%。用0.5%食盐水反萃,镓反萃率为96.8%。反萃液用0.5mol/L NaOH溶液中和、过滤、烘干后,固体中镓的质量百分数为4.32%,从赤泥中富集了136倍。镓的总回收率达到85%以上。The hydrochloric acid leaching process of gallium from Bayer red mud was studied. The effects of leaching temperature, time, ratio of liquid to solid （L/S） and concentration of hydrochloric acid on the leaching rate of gallium were investigated with orthogonal test. The results show that the leaching rate of gallium is 95.4% under the optimum conditions including hydrochloric acid concentration of 8 mol/L, L/S =4. 0, 5 hours leaching at 109 ℃. The extraction rate of gallium reaches 98% with 50% TBP＋50% kero- sene, the stripping rate of gallium is 96.8% with 0.5% salt solution. The stripping solution is neutralized with 0. 5mol/L NaOH solution and then filtrated and dried. The gallium mass percentage is 4. 32% in solid and is enriched 136-fold from the red mud. The total gallium recovery is above 85%.

关 键 词：拜耳法 赤泥 镓 浸出 回收 

分 类 号：TF843.1[冶金工程—有色金属冶金]