Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination

• Published in: International journal of minerals, metallurgy and materials Vol. 19; no. 6; pp. 473 - 477
• Main Authors: Zhu, Ping, Zhang, Xin-jiong, Li, Kun-fang, Qian, Guang-ren, Zhou, Ming
• Format: Journal Article
• Language: English
• Published: Springer Berlin Heidelberg University of Science and Technology Beijing 01.06.2012; Springer Nature B.V; College of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China%Semiconductor Manufacturing International Corporations(Shanghai),Shanghai 201203,China
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chlorination; Composites; Corrosion and Coatings; Glass; Gold; Gold ores; Hydrochloric acid; Kinetics; Leaching; Materials Science; Metallic Materials; Natural Materials; Reaction kinetics; Surfaces and Interfaces; Thin Films; Tribology; 动力学参数; 反应动力学; 扩散控制; 氯化浸出; 浸出温度; 经济效益; 超声; 难处理金矿石; ultrasonic applications; leaching; kinetics; chlorination; gold ore treatment
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-012-0582-6

The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination. The effects of ultrasound time ratio, initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were discussed. It is found that the leaching ratio goes up with all the factors increasing. The reaction kinetics is controlled by diffusion. When ultrasound improves the diffusion by reducing the diffusion resistance, the activation energy increases to 37.1 kJ/mol.