Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第11卷    第3期    总第42期    2001年6月

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文章编号:1004-0609(2001)03-0499-04
选择性沉淀法从钨酸盐溶液中除钼的工业试验
孙培梅, 李洪桂, 李运姣, 苏鹏抟, 霍广生, 赵中伟, 刘茂盛

(中南大学 冶金科学与工程系, 长沙 410083)

摘 要: 对“选择性沉淀法从钨酸盐溶液中除钼”新工艺进行了工业试验。结果表明:对处理含WO3130~244 g/L,含钼0.535~2.55 g/L的工业钨酸铵溶液,除钼后净液中Mo/WO3达到2.00×10-5~9.12×10-5, 除钼率达97.41%~99.64%,同时还能有效除去Sn等杂质;当结晶率为95%以上时,产品APT的质量完全达到GB10116-88APT-0级标准。本技术可大大简化APT结晶母液的处理,与经典的处理结晶母液工艺相比,母液中WO3回收率提高5%以上,NH4Cl的利用率达60%~70%,三废排放量减少60%~70%。

 

关键字: 钨酸盐溶液; 钨钼分离; 选择性沉淀

Commercial scale test of selective precipitation method
for Mo removal from tungstate solution
SUN Pei-mei, LI Hong-gui, LI Yun-jiao, SU Peng-tuan,
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 evaporationcrystallization 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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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