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The objective of this study was to optimize the Au⋅Ag extraction from CPU of abandoned computer using chloride solvent (Chlorine - hypochlorous acid). Batch experiments were conducted under various experimental conditions to examine Au⋅Ag extraction with hydrochloric acid – hypochlorite. Results showed that the extraction of Au⋅Ag by hydrochloric acid - hypochlorite was a fast process, reaching equilibrium (maximum extraction) within 30 min. The Au⋅Ag maximum extraction of 67.84% and 68.20 were investigated under hydrochloric acid to hypochlorite ratio with a 1:1. The influence of NaCl concentration and temperature on Au⋅Ag extraction were significant due to their increase in oxidation potential and solubility of extraction solutions. This study demonstrated that hydrochloric acid - hypochlorite could be applied as solvents for Au⋅Ag recovery in resources resource recovery of an urban mine.
본 연구의 목적은 염산-차아염소산 용매제를 이용하여 폐 CPU내 Au⋅Ag의 용출 최적화이다. 염산-차아염소산 나트륨 용액을 이용한 Au⋅Ag 용출을 관찰하기 위하여 다양한 실험조건에서 회분실험을 실시하였다. 실험결과, 염산-차아염소산 용매제에 의한 Au⋅Ag의 용출은 빠른 반응으로써, 30분 안에 평형(최대용출)에 도달하였다. 염산-차아염소산 나트륨의 Au 용출율은 67.84%이며, Ag는 68.20% 이었다. NaCl의 농도와 반응온도는 Au⋅Ag 용출에 영향을 미쳤는데, 이들 인자들은 용출액의 산화력과 용해도를 증가시켰기 때문이다. 본 연구에 의하면, 염산-차아염소산 나트륨 용액은 용매제로써 도시광산의 자원회수 과정에서 Au⋅Ag 회수에 적용될수 있을 것으로 판단된다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society for Geosystem Engineering
- Journal Title(Ko) :한국지구시스템공학회지
- Volume : 49
- No :6
- Pages :778-787
- DOI :https://doi.org/10.12972/ksmer.2012.49.6.778
Journal of the Korean Society of Mineral and Energy Resources Engineers
