铟废渣中铟的回收

Residue Indium Recycling in Indium Waste

对铟废渣中铟的回收进行了条件和工艺的研究，研究了酸度、液固比、时间、温度等因素对铟浸出率的影响。实验研究结果表明，控制合适的的工艺条件：反应温度为60℃，反应时间为6h，液固比为4：1，酸度440g／L（H2SO4），加CaO，加聚丙稀酰胺；锌粉置换温度为常温，时间为72h，pH1～2，锌粉粒度80～120目可以高效地置换出酸液中的铟，并且一次浸出率达到79％，富集后铟的浸出率高于87．83％。

The condition and craft of residue indium recycling in indium waste were researched. The acidity, fluid to solid ratio, time, temperature etc. that affect the leaching rate of the indium were studyed. The react conditions were as follows： temperature 60 12, time 6 h, fluid to solid ratio 4：1, acidity 440 g/L（H2SO4） ; if adds CaO and acrylamid, the zinc powder replacement temperature was normal, the time 72 h, pH 1～2 and zinc powder granularity 80～120. The experiment results indicated that controcing the appropriate craft condition can replace the indium highly in the acid liquor. The leaching rate can achieve 79 % at the first time, and after concentrating the indium leaching rate could be higher than 87.83 %.