Study on Recovering Indium from the Oxygen Pressure-Leaching Solution of Indium-Containing Zinc Concentrate

By using the zinc concentrate leaching solution with indium contained as raw material,the precess of riching indium was studied by method of reducing Fe3+ by using the zinc concentrate and neutralizing-prcipitation indium.The results showed that the reducing rate of Fe3+ was 96% for 120 minutes of reduceing time at 95℃ with adding quantity of the zinc concentrate 3 times as the theorrtical need;consistency of indium in liquid after precipitating indium was only 0.004 g/L,the content of indium in precipitate was around 1%,the quality rate of indium to iron in precipitate is about 8.3.