Integrated hydrometallurgical process for production of zinc from electric arc furnace dust in alkaline medium

摘要

In this study, a novel and integrated hydrometallurgical process for the production of zinc powder from electric arc furnace (EAF) dust in alkaline medium is reported. The dust is firstly hydrolysed in water, and then fused in caustic soda at 350deg.C for 1 h, followed by leaching in alkaline solution in which both zinc and lead are effectively extracted. Zinc powder is then pro- duced by electrowinning from the leach solution after the lead is selectively removed by precip- itation using sodium sulphide as precipitant.