The acid leaching of spent zinc containing targets resources recycling technology

Yu Chi Wang, Wei Sheng Chen, Kai Lun Chiu, Wei Chung Chen

Research output: Contribution to conferencePaper

Abstract

This study focuses on the transparent conductive zinc oxide target: zinc sulfide (ZnS) and gallium zinc oxide (GZO). These two kinds of zinc film targets, conduct resource recycling as zinc sulfide and zinc carbonate powder and the targets contains silver, gallium, indium and other rare metals that we try to make this recycling process effectively. We peeled off the coating layer of the targets and analyzed it. We found that the silver and gallium are in the structure of the targets while the indium is in the coating layer. We used different concentration of nitric acid to leach the rare metals in the targets. Then, we tried different solid-liquid ratio to leach the rare metals. With different conditions, we got different data of leaching amount. After leaching, we will choose solvent extraction to enrich the rare metals and recycle. By using the right condition, we can get 90% overall fraction recovery with more than 98% purity of silver, gallium and indium. After the recovery of rare metal, zinc metal can also be recovered effectively. Therefore, this makes zinc metal and precious metal recovery efficiency of the substantial increase. Moreover, this recovery method has less impact on the environment.

Original languageEnglish
Pages698-704
Number of pages7
Publication statusPublished - 2015 Jan 1
Event13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand
Duration: 2015 Nov 12015 Nov 4

Other

Other13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015
CountryThailand
CityPattaya
Period15-11-0115-11-04

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

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  • Cite this

    Wang, Y. C., Chen, W. S., Chiu, K. L., & Chen, W. C. (2015). The acid leaching of spent zinc containing targets resources recycling technology. 698-704. Paper presented at 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015, Pattaya, Thailand.