سال انتشار: ۱۳۹۱

محل انتشار: اولین همایش بین المللی و ششمین همایش مشترک انجمن مهندسی متالورژی ایران

تعداد صفحات: ۱۰

نویسنده(ها):

Mehdi Ghobeiti Hasab – School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
Fereshteh Rashchi –
Shahram Raygan –

چکیده:

In this paper, gold leaching of a refractory sulfide concentrate by chloride–hypochlorite solution was investigated and effects of stirring speed, temperature and particle size on the leaching rate were reported. Experimental data for leaching rate of gold were analyzed with the shrinking core model. Results were consistent with chemical reaction control mechanism in the first 1 h of leaching and diffusion control mechanism in the second 1 h. Activation energy also was found to be 22.68 kJ/mol in the first step and 3.93 kJ/mol in the second step of leaching