硫酸烧渣中铁浸取条件的研究及应用

The research and application of leaching condition of Fe in the sulphuric acid residue

以硫酸烧渣、废酸为原料制取铁系化工产品。通过硫酸烧渣的活化焙烧及硫酸浓度、固液比、浸取时间等关键工艺条件的研究,得到最佳浸取条件:即烧渣与活化剂质量配比4∶1,固液比0.25～0.30g/mL,反应时间40～50min,酸度50%～60%。渣中铁浸取率达到95%以上,浸取液可以直接用于制备铁系产品。

This experiment is to make a range of Feseries products from sulphuric acid residue and waste sulphuric acid.Through the research of such key technological conditions as activation roast,the sulphuric acid concentration,the solidliquid ratio,and the leaching time,the best leaching conditions are as following:residue/active agent=4∶1,solid/liquid=0.25～0.30 g/mL,reaction time:40～50 min and the acidity 50%～60%.The leaching rate of iron can reach 95%.