The Study and Application of Hydrometallurgical Gold Leaching in the Analysis of Refractory Precious Metals

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Yang, M.^1,2 ; Geng, X.^2 ; Wang, Y.L.^1,2 ; Li, D.X.^2

Shanghai Cooperative Center for WEEE Recycling, Shanghai Second Polytechnic University, Shanghai

201209, China^1

School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai

201620, China^2

关键词: Aqua-regia digestion;    Gold leaching;    Leaching process;    Optimum conditions;    Optimum reaction conditions;    Orthogonal test;    Sodium thiosulfate;    Study and applications;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012030/pdf
DOI  :  10.1088/1755-1315/63/1/012030

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Three orthogonal tests are separately designed for each hydrometallurgical gold leaching process to finding the optimum reaction conditions of melting gold and palladium in each process. Under the optimum condition, the determination amount of gold and palladium in aqua regia - hydrofluoric acid, Sodium thiosulfate, and potassium iodide reaches 2.87g/kg and 8.34 g/kg, 2.39g/kg and 8.12 g/kg, 2.51g/kg and 7.84g/kg. From the result, the content of gold and palladium using the leaching process of combining Aqua regia, hydrofluoric acid and hydrogen peroxide is relatively higher than the other processes. In addition, the experiment procedure of aqua regia digestion operates easily, using less equipment, and its period is short.