研究了一个从低品位钨原料生产高纯仲钨酸铵(APT)的新的湿法冶金过程。流程包括两段逆流浸出;净化除Sn,Si,As,P;溶剂萃取及吸附法分离钨与钼;钨的溶剂萃取;湿法多段脱浮等工序。这一新工艺适于处理Si,As,P,Mo,Sn,Mn,Ca等含量变化很大的原料。当结晶率大于90%时,APT中的杂质总量小约110ppm,三氧化钨的工艺总收率大于90%。 A new hydrometallurgical process for the production of high purity APT from low-grade tungsten raw materials was studied. The process includes two stages of countercurrent leaching; the purification is performed except for Sn, Si, As, P; solvent extraction and adsorption are used to separate tungsten and molybdenum; the solvent extraction of tungsten is performed; This new process is suitable for processing raw materials with greatly varying contents of Si, As, P, Mo, Sn, Mn, Ca and so on. When the crystallization rate is greater than 90%, the total amount of impurities in the APT is less than about 110 ppm and the total process yield of tungsten trioxide is greater than 90%.