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

Ping Zhu1), Xin-jiong Zhang1), Kun-fang Li1), Guang-ren Qian1), and Ming Zhou2) 1) College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China 2) Semiconductor Manufacturing International Corporations (Shanghai), Shanghai 201203, China

摘 要：The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper in-vestigated 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 re-ducing the diffusion resistance, the activation energy increases to 37.1 kJ/mol.

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