(江西省稀土研究所，南昌330013)
摘 要: 報道了萃取分離中國南部離子吸附型稀土礦的一種新工藝，第一步進行La-Gd/(Gd)TbDy(HoY)/Ho-LuY萃取分組，出口水相La-Gd再進行Nd/Sm分組；中間出口的(Gd)TbDy(HoY)組份進行Tb/Dy分離。 在各系列的萃取段前設(shè)附加段來提高稀土濃度和回收率。該工藝流程銜接容易，昂貴的P507 萃取劑使用量減少，處理能力增加，貴重Tb，Dy在流程前部富集直收率提高，制取高純Tb，Dy成本降低。適用于高釔礦經(jīng)提釔后的低釔混合稀土礦、 釔富銪礦、低釔離子稀土礦的萃取分離。
關(guān)鍵字: 萃取分離；低釔混合稀土
（Jiangxi Research Institute of Rare Earth, Nanchang 330013, P. R.China）
Abstract:A new extractional process which separates the ion-absorptive rare earth minerals in south China was reported. In the process, the first step is the separation of La-Gd and (Gd)TbDy(HoY) and Ho-LuY using HEH(EH)P, which is different from usual Nd/Sm method. Next, the raffinate obtained from the first step containing La-Gd rare earths is used as raw feed of Nd/Sm process with D2EHPA or HEH(EH)P. The (Gd)TbDy(HoY) concentrate obtained from the first step is directly fed to Tb/Dy process. This process is suitable for low yttrium mischmetal, middle yttrium mineral and low yttrium mineral in South China.
Key words: extractional separation; mischmetal
