离子型稀土矿浸取剂遴选及柱浸工艺优化研究  

Selection of Leaching Agent and Optimization of Column Leaching Process of Ion-Absorbed Rare Earth Deposits

作　　者：王瑞祥[1] 谢博毅[1] 余攀[1] 张兆雪[1] 毛继勇[1] 熊家春 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《稀有金属》2015年第11期1060-1064,共5页Chinese Journal of Rare Metals

基　　金：国家科技部高技术研究发展计划(863计划)项目(2012AA061901);国家自然科学基金项目(51164011);江西省科技支撑计划项目(20141BBG70004);江西省高等学校科技落地计划项目(KJLD13041);福建省区域科技重大合作项目(2011H4025)资助

摘　　要：采用规格为Φ6 cm×20 cm的有机玻璃柱柱浸方式,开展了离子型稀土矿新型无氨氮浸取剂的遴选及柱浸工艺优化研究,重点考察了浸取剂类型、浸出剂质量分数、浸出剂用量、浸出p H值对稀土浸出率的影响。研究结果表明,遴选出的硫酸镁作为离子型稀土矿新型无氨氮浸取剂,稀土浸出的效果较好,并确定了较优柱浸工艺条件:浸出剂硫酸镁质量分数为2%,浸出剂用量为液固体积质量比1.0∶1.0,浸出p H值为5.0,水洗用量为液固体积质量比1∶1,浸出的温度为室温。在上述条件下,进行3次平行实验,稀土平均浸出率达到98.40%。在此基础上,采用规格为Ф11 cm×100 cm的有机玻璃柱进行扩大柱浸实验,扩大实验结果表明,该浸出工艺稳定,稀土浸出率稳定,达到99%以上。The selection study of new non-ammonia nitrogen leaching agent of ion-absorbed rare earth deposits by specifications with Ф6 cm× 20 cm plexiglas column leaching method was carried out. The effects of leaching agent types and mass fraction, dosage, pH value of leaching agent on the leaching rate of rare earth were investigated. Experimental results showed that the magnesium sulfate was preferably as a new non-ammonia nitrogen leaching agent of ion-absorbed rare earth deposits. It was selected as the optimal leaching agent. And the optimal conditions of column leaching process were that the mass fraction of magnesium sulfate was 2% , magnesium sulfate dosage was the volume mass ratio of liquid to solid of 1.0： 1.0, pH value was 5.0, and water dosage was the volume mass ratio of liquid to solid of 1 ： 1 at room temperature. Under above-mentioned conditions, three parallel experiments were carried out. The average leaching rate of rare earth was 98.40%. The extensive experiment of column leaching process by specifications with Ф 11 cm × 100 cm plexiglas column was carried out on this basis. Experimental results showed that the leaching rate of rare earth was stable and reached more than 99%.

关 键 词：硫酸镁 离子型稀土矿 柱浸 浸出率 

分 类 号：TF845[冶金工程—有色金属冶金]