高纯钨酸铵溶液结晶制取超高纯APT的研究  

Preparation of Super High-purity APT by Crystallization from High-purity(NH_4)_2WO_4 Solution

作　　者：万林生[1] 习雪康[1] 严永海 章小兵[1] 

机构地区：[1]江西理工大学,江西赣州341000 [2]章源钨业股份有限公司,江西崇义341200

出　　处：《稀有金属与硬质合金》2010年第4期6-9,20,共5页Rare Metals and Cemented Carbides

摘　　要：通过控制不同的APT(仲钨酸铵)结晶率、结晶温度以及钨酸铵溶液中WO3初始浓度等条件进行蒸发结晶实验,研究了P、Mo、S、Fe等杂质在高纯钨酸铵溶液蒸发结晶中的析出规律。实验结果表明:降低APT结晶率和提高钨酸铵溶液中WO3浓度均能不同程度地降低P、Mo、S、Fe等杂质在APT中的含量;提高结晶温度对于减少APT中S含量效果最好,且P、Mo、S、Fe含量的下降幅度S>P>Mo>Fe。Evaporation crystallization experiments of（NH4）2WO4 solution were carried out through controlling different APT crystallization ratio,crystallization temperature and initial WO3 concentration in the solution.The rules of P,Mo,S and Fe impurity precipitation from high purity（NH4）2WO4 solution during evaporation crystallization were studied.The results show that reducing APT crystallization ratio and increasing initial WO3 concentration can significantly decrease the impurity content in APT.The least sulfur content in APT can be obtained by raising crystallization temperature,and the reduction level of P,Mo,S and Fe content follows the order of SPMoFe.

关 键 词：超高纯APT 钨酸铵溶液 蒸发结晶 P MO S FE 杂质析出 

分 类 号：TF841.1[冶金工程—有色金属冶金]