Title: New Technology for Indium Efficient Leaching from Zinc Oxide Dust
Abstract: Indium serves a wide range of industrial applications because of its excellent specificity. How to efficiently recover indium from various indium-bearing materials is the key problem in technology. However, nearly all of the extraction processes have a disadvantage of low indium recovery. In this study, a new process of neutral leaching-low acid low temperature leaching-high temperature strengthened was employed to efficiently leach indium from indium-bearing zinc oxide dust. The optimal leaching conditions and leaching mechanism were investigated. The results showed that the neutral leaching made zinc preferentially extracted and indium left in the leaching residue, which was then treated by low acid low temperature leaching process to make high valence indium enter the leaching solution. The resulted insoluble indium in the residue was treated by high temperature strengthened leaching to oxidize the low valence indium to high valence and destroy the surface structure of the insoluble indium phase to strengthen indium leaching effect. Finally indium was enriched in low acid leaching solution with its leaching ratio ≥93%. This project provides new method and theoretical guidance for indium recovery from various indium containing resources and effective utilization of rare metal resources. It has a promising industrial application prospect.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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