锌铟冶炼过程中镉砷的流向及在废渣中的分布

摘要

研究了锌铟冶炼过程中镉和砷的流向及在废渣中的分布规律和富集机制。结果表明：在锌、铟冶炼过程中，镉的主要流向为氧粉→中性浸出液→一段铜镉渣→二段铜镉渣→净化渣，砷的主要流向为氧粉→中性浸出渣→酸性浸出液→铟萃取液→反萃取液→中和渣；镉主要集中在一段铜镉渣和二段铜镉渣中，砷则更多集中于中和渣中。锌、铟冶炼过程中，一段铜镉渣和中和渣应重点监测。%The flow direction ,distribution and enrichment mechanism in waste residue of cadmium and arsenic in zinc and indium smelting process were studied .The results showed that in the process of zinc and indium smelting ,the main flow direction of cadmium is oxide flue dust →neutral leaching liquid→first stage copper and cadmium residue→second stage copper and cadmium residue→purification slag . T he main flow direction of the arsenic is oxide flue dust →neutral leaching residue→acid leaching liquid→ indium extraction liquid → back-extraction solution → neutralize residue .Cadmium is mainly concentrated in first stage copper-cadmium residue ,second stage copper-cadmium residue ,arsenic is more enriched in neutralize residue .For all kinds of waste residue in zinc and indium smelting process , the first stage copper-cadmium residue and neutralize residue should be monitored .