Paper Information

Journal:   IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING   JUNE 2014 , Volume 11 , Number 2; Page(s) 37 To 47.
 
Paper: 

KINETIC STUDIES FOR GOLD LEACHING OF A REFRACTORY SULFIDE CONCENTRATE BY CHLORIDE-HYPOCHLORITE SOLUTION

 
 
Author(s):  GHOBEITI HASAB M., RASHCHI F.*, RAYGAN SH.
 
* SCHOOL OF METALLURGY AND MATERIALS ENGINEERING, COLLEGE OF ENGINEERING, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

In this pape1; 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 he 22.68 kllmol in the first step and 3.93 kl/mol in the second step of leaching.

 
Keyword(s): GOLD CONCENTRATE, NON-CYANIDE LEACHING, CHLORIDE-HYPOCHLORITE, KINETIC
 
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