从高杂钨细泥制取高纯仲钨酸铵的新工艺
来源期刊：中南大学学报(自然科学版)1990年第4期
论文作者：张启修 龚柏凡 黄蔚庄 黄芍英
文章页码：389 - 396
关键词：钨； 低品位矿； 对流浸出； 吸附分离； 液液萃取
Key words：tungsten； low-grade ores； countercurrent leaching； adsorption separaton； liquid-liquid extraction
摘 要：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%。
Abstract: A new hydrometallurgical process for producing high-purity ammonium paratungstate(APT) from low-grade tungsten material is presented.The flowsheet includes two-stage countercurrent leaching,removal of Sn,Si,As and P,separation of molybdenum from tungsten by solvent extraction or adsorption,solvent extraction of tungsten with N235 and a wet-type multi-step flotation agent removal process.This process is suitable for treating materials whose content of impurities(Si,As,P,Mo,Sn,Ca)fluctuates widely.When the crystallization rate is greater than 90% the total amount of the impurity of APT is less than 110ppm.The recovery of WO3 in the process is more than 90%.
