(1. 江西农业大学 理学院， 南昌 330045;
2. 江西农业大学 应用化学研究所， 南昌 330045)
摘 要: 采用一种新的串级萃取方式——萃取预分离法分离富铕中钇矿的新工艺。 原料首先流入十几的三出口预先粗分离工艺， 其萃余液La~Gd(TbDy) 直接流入Nd/Sm工艺； 中间出口流入(Gd)Tb~HoY(Er)Gd~Dy/Ho~LuY细分离工艺； 出口负载有机相(Ho)Er~LuY流入Gd~Dy/Ho~LuY的洗涤段。 结果表明， 新工艺的粗分离工艺将占原料约70%的La~Gd(TbDy)预分离掉， 使流入Gd~Dy/Ho~LuY工艺的稀土量减少约70%； 由于Gd~Dy/Ho~LuY分组的萃余液GdTbDy含Ho2O3小于0.03%， 省去原工艺的GdTbDy/HoY分离； 新工艺的处理能力提高30%， 酸碱消耗减少20%以上， 贵重稀土元素Eu和Tb的存槽量大大减少。
关键字: 富铕中钇矿； 萃取工艺； 萃取预分离法； 稀土
（ 1. College of Science, Jiangxi Agricultural University, Nanchang 330045, China;
2. Institute of Applied Chemistry, Jiangxi Agricultural University,
Nanchang 330045, China）
Abstract: A new pre-separation extraction method and a new separation process for the rare earth mineral with middle Y and rich Eu were introduced. The first step of the new process is a pre-separation extraction process of three outlet with number of stages more 10, the raffinate La~Gd(TbDy) directly flows into separation process of Nd/Sm. The (Gd)Tb~HoY(Er) of middle outlet is used as aqueous feed of Gd~Dy/Ho ~LuY process, the extract loaded (Ho)Er~LuY directly flows into the scrubbing section of the Gd~Dy/Ho ~LuY process. As a result, the pre-separation extraction process of the new process separates out the La~Gd(TbDy), and the content in raw material is approximately 70% from raw material, the feed flowing into Gd~Dy/Ho~ LuY process decreases approximately 70%. Due to the Ho2O3 content in the raffinate of the Gd~Dy/Ho~LuY process less than 0.03%, the separation GdTbDy/ HoY of the GdTbDy(HoY) concentrate from original process is leaved out. While the process handling capacity with the new process increases more 30%, the consumption of chemical reagents including HCl and NH3 decreases 20%, the hold capacity of valuable rare earth element Eu and Tb reduces largely.
Key words: middle Y and rich Eu mineral; extraction separation process; pre-separation extraction method; rare earth
