Volume 11, Issue 2 (June 2014)                   IJMSE 2014, 11(2): 37-47 | Back to browse issues page

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M. Ghobeiti Hasab, F. Rashchi, Sh. Raygan. KINETIC STUDIES FOR GOLD LEACHING OF A REFRACTORY SULFIDE CONCENTRATE BY CHLORIDE–HYPOCHLORITE SOLUTION. IJMSE 2014; 11 (2) :37-47
URL: http://ijmse.iust.ac.ir/article-1-654-en.html
KINETIC STUDIES FOR GOLD LEACHING OF A REFRACTORY SULFIDE CONCENTRATE BY CHLORIDE–HYPOCHLORITE SOLUTION
M. Ghobeiti Hasab , F. Rashchi , Sh. Raygan
Abstract:   (20596 Views)
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. Apparent 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.
Keywords: Gold concentrate, Non–cyanide leaching, Chloride–hypochlorite, Kinetic.
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Type of Study: Research Paper | Subject: materials engineeing and special subjects
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