从掺钕钇铝石榴石晶体中回收稀土  

Recovery of Rare Earth from Scrapped Nd: YAG Crystal

作　　者：李来超 张榕贵 余煜玺[2] 

机构地区：[1]厦门钨业股份有限公司,福建厦门361004 [2]厦门大学材料学院材料科学与工程系福建省特种先进材料重点实验室,福建厦门361005

出　　处：《中国稀土学报》2017年第2期225-230,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51675452)资助

摘　　要：为实现YAG系列晶体生产过程所产生废弃物中的稀土元素的综合利用,以废弃Nd:YAG晶体碎片为原料,经过破碎、碱熔、水洗、酸溶、除杂等一系列工序,得到非稀土杂质较低的氯化钇钕混合溶液,直接作为萃取分离线的原料。实验选用的碱熔融预处理及环烷酸萃取除杂,可有效地将Al与稀土元素分离;而且碱熔融预处理工艺能显著提高废弃Nd:YAG晶体碎片中稀土酸浸出的效率。在最优条件下可回收高达91.3%的稀土元素。In order to recycle rare earth elements from the wastes during YAG crystal production,four operations such as alkali melting,water washing,acid dissolving and unsaponified acid solvent extracting were adopted for getting rare-earth chloride solution which meets the rare earth separation process. The result showed that scrapped YAG powder completely soluble in hydrochloric acid while the size was small enough,and most part of Al could be removed by forming sodium meta-aluminate which could solute in water. The total recoveries of rare earth came to91. 3% under the optimal conditions.

关 键 词：稀土 回收 YAG 

分 类 号：TF845[冶金工程—有色金属冶金]