中文摘要：

阐述了采用氟盐转型-HF-H2SO4浸出-氟盐氨转化循环利用过程同步提取废钨渣中的钽、铌、钨的新工艺.通过实验确定了最佳工艺条件，在最优条件下可分别获得Ta2O5和Nb2O5含量分别为6.08%和27.29%的钽铌富集渣及WO3含量为26.71%的钨富集渣.两种富集渣均可直接用于工业生产.钽、铌、钨的单程回收率分别达到83.18%、88.33%和77.91%.该方法工艺流程简单，操作条件温和，且由于氟盐可实现循环利用，工艺过程物料消耗低、成本低廉、技术经济性良好.

英文摘要：

This paper describes a new technology for co-extracting tantalum, niobium and tungsten from tungsten residue using fluoride salt transformation-HF-H 2SO4 leaching-fluoride salt recycling through ammonia conversion.The optimal technical conditions are ensured by experiments. Under the optimal condition, an enriched material with the contents of Ta2O5 and Nb2O5 are 6.08 % and 27.29 % respectively and an enriched material with the content of WO3 is 26.71 % are gained. The single pass recovery rates of tantalum, niobium and tungsten are 83.18 %, 88.33 % and 77.91 %, respectively. This technology process is simple with mild operation conditions. This new process offers a favorable technical economic value due to the recycling use of the fluoride salt and low cost materials consumption.