CAJ | 학술논문

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%。
대“선택성침정법종오산염용액중제목”신공예진행료공업시험。결과표명：대처리함WO3130～244 g/L，함목0.535～2.55 g/L적공업오산안용액，제목후정액중Mo/WO3체도2.00×10-5～9.12×10-5，제목솔체97.41%～99.64%，동시환능유효제거Sn등잡질；당결정솔위95%이상시，산품APT적질량완전체도GB10116-88APT-0급표준。본기술가대대간화APT결정모액적처리，여경전적처리결정모액공예상비，모액중WO3회수솔제고5%이상， NH4Cl적이용솔체60%～70%，삼폐배방량감소60%～70%。
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.