(中南大學 冶金科學與工程系， 長沙 410083)
摘 要: 對“選擇性沉淀法從鎢酸鹽溶液中除鉬”新工藝進行了工業(yè)試驗。結果表明：對處理含WO3130～244 g/L，含鉬0.535～2.55 g/L的工業(yè)鎢酸銨溶液，除鉬后凈液中Mo/WO3達到2.00×10-5～9.12×10-5， 除鉬率達97.41%～99.64%，同時還能有效除去Sn等雜質；當結晶率為95%以上時，產(chǎn)品APT的質量完全達到GB10116-88APT-0級標準。本技術可大大簡化APT結晶母液的處理，與經(jīng)典的處理結晶母液工藝相比，母液中WO3回收率提高5%以上，NH4Cl的利用率達60%～70%，三廢排放量減少60%～70%。
關鍵字: 鎢酸鹽溶液; 鎢鉬分離; 選擇性沉淀
for Mo removal from tungstate solution
HUO Guang-sheng, ZHAO Zhong-wei, LIU Mao-sheng
（Department of Metallurgy Science and Engineering,
Central South University,Changsha 410083, P.R.China）
Abstract:The commercial scale test was conducted for impurity molybdenum removal from tungstate solution by selective precipitation method. The results show that after commercial (NH4)2WO4 solutions containing 130～244 g/L WO3 and 0.535～2.55 g/L Mo are treated, the Mo/WO3 ratio in purified solution is 2.00×10-5～9.12×10-5 and the Mo removal rate can reach 97.41%～99.64%. Impurity Sn can be removed simultaneously. The quality of product APT obtained after the evaporationcrystallization of purified (NH4)2WO4 solution can conform to GB10116-88APT-0 standard at 95.0%～98.0% crystallization rate. The treatment process of APT crystal liquor is simplified significantly using the technology. The increase of WO3 recovery rate is over 5% in comparison with classical processes and the utilization ratio of NH4Cl is 60％～70%. The practice has expressed that the technology has outstanding characteristics of good adaptability for raw materials, simple process and equipments, high metal recovery and good economics profits.
Key words: tungstate solution; separation of Mo from tungstate solution; selective precipitation
