摘要
以三聚磷酸钠为沉淀剂,研究了模拟含铟加压浸出液和实际含铟加压浸出液中影响铟沉淀率的因素。结果表明:常温下,pH值范围在2.5～2.7,搅拌时间为1.5h,三聚磷酸钠与铟摩尔比为0.91∶1,体系中Fe3+浓度小于0.04g.L-1时,铟的沉淀率高达95%以上。溶液中Fe3+对铟的沉淀率有显著影响,当体系中Fe3+浓度为4.8g.L-1时,铟的沉淀率从96%降到34%,Fe2+,Cu2+,Zn2+等金属离子对铟的沉淀率没有影响,温度对铟的沉淀率也没有影响。并提出可能的反应机制:用三聚磷酸钠沉铟,首先析出含羟基的盐In2OHP3O1.09H2O,随后转变为InH3(PO4)2.4H2O。
Influence factors of indium precipitation rate from simulated and actual pressure oxidative leaching liquor with sodium tripolyphosphate were investigated.The results showed that the indium precipitation rate was above 95% when the pH value was 2.5~2.7,reaction time was 1.5 h and the molar ratio of sodium tripolyphosphate was 0.91∶1 without Fe3+ at normal temperature,and the indium precipitation rate was reduced to 34% from 96% when the concentration of Fe3+ was 4.3 g·L-1,while Fe2+,Cu2+,Zn2+ had no signifi...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第2期285-290,共6页
Chinese Journal of Rare Metals
基金
云南省科学研究基金资助项目(2008049)
关键词
三聚磷酸钠
沉铟
加压浸出液
sodium tripolyphosphate
indium precipitation
pressure leaching liquor
